WO2017174751A1 - Procédé de combustion à faible taux en émissions d'oxyde d'azote de combustibles solides, liquides ou gazeux, en particulier de charbon pulvérisé, brûleur et installation de chauffe pour mettre ledit procédé en oeuvre - Google Patents

Procédé de combustion à faible taux en émissions d'oxyde d'azote de combustibles solides, liquides ou gazeux, en particulier de charbon pulvérisé, brûleur et installation de chauffe pour mettre ledit procédé en oeuvre Download PDF

Info

Publication number
WO2017174751A1
WO2017174751A1 PCT/EP2017/058301 EP2017058301W WO2017174751A1 WO 2017174751 A1 WO2017174751 A1 WO 2017174751A1 EP 2017058301 W EP2017058301 W EP 2017058301W WO 2017174751 A1 WO2017174751 A1 WO 2017174751A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
burner
fuel
flow
slots
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/058301
Other languages
German (de)
English (en)
Inventor
Hans-Ulrich Thierbach
Stefan Hamel
Anojan Santhirasegaran
Samir Nasri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Steinmueller Engineering GmbH
Original Assignee
Steinmueller Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Steinmueller Engineering GmbH filed Critical Steinmueller Engineering GmbH
Publication of WO2017174751A1 publication Critical patent/WO2017174751A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
    • F23C5/08—Disposition of burners
    • F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/102—Furnace staging in horizontal direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/10—Nozzle tips
    • F23D2201/101—Nozzle tips tiltable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/20—Fuel flow guiding devices

Definitions

  • the invention relates to methods for the combustion of solid, liquid or gaseous fuels, in particular pulverized coal, a burner and a furnace for carrying out the method.
  • Lignite makes a significant contribution to power generation.
  • Lignite usually contains a high water content, which is evaporated during comminution in the mill by mixing with hot, extracted from the furnace flue gas flue gas. This results in a particle-carrier gas mixture which contains a high proportion of water vapor and impairs the ignition properties at the fuel outlet. Owing to the large transport gas volume flows in conjunction with the larger lignite mass flows resulting from the lower calorific value, large cross sections for the burners are obtained to maintain predetermined speeds of the carrier gas-particle mixture.
  • Lignite dust burners are usually used as jet burners (also called register or slot burners) with rectangular cross-sections.
  • air nozzles are provided in the middle planes but also above and below the dust outlet for supplying under-air, middle air and upper air.
  • the burner is divided into two fingers, which in turn are separated horizontally by a core air. Below the lower finger is the sub-air supply, between both fingers the intermediate or middle air and above the upper burner finger the upper air.
  • DE 37 31 271 C2 describes a brown coal jet burner, which admits flue gas between the lower, middle and upper air opening and the associated dust-Traggas-Gemisch- cross section in each case by a further cross-section to separate the air from the fuel.
  • the defined goal was to achieve a delayed ignition to avoid combustion peak temperatures and thereby reduce the slagging tendency of the firebox by lignite ash.
  • a separation of the particle-carrier gas mixture in a particle-enriched and a depleted fraction by means of so-called Brüdentrennung be useful.
  • a device for this purpose for example, DE-OS 29 33 528 A1, wherein a swirl body in the dust line from the mill to the burners ensures that a fuel-rich and a fuel-poor (vapors) partial flow is formed, which is then fed to individual burners.
  • the partial streams are passed to jet burners, wherein the fuel-enriched partial flow to two burners (main burner) in the lower combustion chamber area and the fuel-poor vapor stream is passed to a separate burner above the main burner.
  • NOx nitrogen oxides
  • thermal NO x The oxidation of the nitrogen of the combustion air (thermal NO x ) and the oxidation of the fuel nitrogen (fuel NO x ).
  • Thermal NO x is formed essentially at temperatures greater than about 1200 ° C to 1500 ° C, because only at these temperatures the molecular oxygen present in the air changes noticeably into atomic oxygen (thermal oxidation) and with the nitrogen of the air combines.
  • the rate of formation of thermal NOx depends exponentially on temperature and is proportional to the oxygen concentration.
  • the primary nitrogen compounds contained in the fuel first disintegrate into secondary nitrogen compounds (simple amines and cyanides), which are competitively converted to either NO x or N 2 in the course of combustion.
  • secondary nitrogen compounds simple amines and cyanides
  • NO x is competitively converted to either NO x or N 2 in the course of combustion.
  • N 2 is preferred or the formation of NO x is suppressed or even reversed.
  • the formation of fuel NO x is only slightly dependent on temperature and proceeds even at low temperatures.
  • the measures to reduce NO x emission are aimed at lowering the combustion temperature and generating a lack of oxygen during combustion.
  • stage burners In such stage burners, the entire combustion air is divided into primary air and stage air. A part of the recirculated flue gas is fed with the primary air through the burner core, the other supplied with cold fresh air as a step air.
  • An essential feature in furnaces with several superimposed burner levels is that the temperature profile of the flue gas has a maximum along the longitudinal axis of the combustion chamber. In the area around the temperature maximum, in the so-called high temperature range, an increased formation of thermal NO x begins. A further reduction of the NO x emission can therefore be achieved by targeted influencing of the combustion process in the combustion chamber, for example by an additional air or fuel staging.
  • the burners receive only part of the amount of air necessary for complete combustion.
  • the remaining air is e.g. in the so-called OFA process (over-fire-air) blown above the burner in the furnace.
  • nitric oxide combustion of coal dust in a combustion chamber is known to supply the oxidizing agent, usually in the form of air, stepped.
  • the fuel eg lignite dust
  • the fuel is introduced with the secondary air into the combustion chamber, eg by means of jet burners installed in the combustion chamber wall, in such a way that initially only substoichiometric combustion can take place. This ensures that the least possible NO x is produced or reduced in a subsequent reduction zone.
  • a further addition of air takes place above the jet burners in a so-called air staging.
  • DE 35 31 571 A1 discloses a method for burning fuels while reducing the nitrogen oxide load and a furnace for carrying out the method.
  • coal dust in particular is introduced tangentially into a rectangular or square combustion chamber via main burners and, in addition, reduction fuel is introduced into the combustion chamber via reduction burners for reducing the nitrogen oxides formed during the combustion of the main fuel and burned in a substoichiometric manner.
  • combustion air is supplied to the conversion of the main fuel above the supply of main and reduction fuel. The supply of all reactants is done in such a way that a helical ascending flow is built up in the furnace.
  • the reduction burner near its associated main burner are arranged at least with a lateral distance and aligned so that when operating the Tangential85ung the injected over the reduction burner reducing fuel is mixed at a predetermined location in the main burner to be assigned primary flame.
  • the burner consists of one or more main burners and fuel nozzles are horizontally limited by under air nozzles, intermediate air nozzles and top air nozzles, on each side of each fuel nozzle additional side air nozzles are arranged without lateral distance to the fuel nozzles.
  • the additional side air nozzles may have the same vertical extent as the fuel nozzles or may extend over the entire vertical length of the main burner.
  • the document EP 1 731 832 furthermore describes a tangential firing.
  • the axes of the main burner are directed to a circle of the combustion chamber longitudinal axis.
  • the main burner consists of three rectangular fuel nozzles, which are bounded below by the lower air nozzle and above by the upper air nozzle. Between the individual fuel nozzles intermediate air nozzles are arranged. The under air nozzles, the upper air nozzles and the intermediate air nozzles are arranged over the entire width of the fuel nozzle.
  • the pulverized coal-flue gas mixture is entered into the combustion chamber.
  • the fuel nozzles have center core air pipes or nozzles in a cross-shaped arrangement.
  • FIG. 1 The variant shown is equipped with two burner fingers, each burner fingers having horizontal central core air pipes or nozzles. Furthermore, in this design, the burner fingers are horizontally limited by the lower air slot, intermediate air slot and upper air slot.
  • the center core air pipes divide the burner finger into two burner half fingers and, in addition to participating in the combustion process, also provide cooling of the dust fingers when the burner is out of operation. In this burner concept, the main secondary air flow is injected above, below and below the fuel jet.
  • the distinguishing or special feature of this conventional burner is the horizontal stratification between dust flow and the main secondary air flow.
  • This air staging on the one hand to the total fuel jet recirculation of hot flue gas, which is required for a reliable ignition.
  • this air staging reduces the primary pollutant emissions, in particular the formation of nitrogen oxides, due to the reduction of the O2 supply by a low air ratio (air / fuel ratio) in the burner belt area. Because of the horizontal stratification of combustion air and coal dust, a slow mixing of the two components is achieved.
  • the technical object is achieved by a method for the combustion of solid, liquid or gaseous fuels, in particular pulverized coal, in which the fuel stream is introduced and burnt into a combustion chamber via one or more main burners,
  • the other part of the burner air is introduced via unilaterally arranged air slots or air nozzles which extend at least over the entire vertical extent of all fuel slots of the main burner, into the combustion chamber, said laterally introduced burner air, the fuel flow of the respective main burner, vertical on one side limited and forms a side air stream;
  • At least 20% of the burner air introduced via a main burner is introduced into the combustion chamber via the side louvers or air nozzles of the main burner so that a vertical stratification is created between the fuel flow and the burner air flow;
  • the concentration of fuel flow increases from the side airflow side to the opposite side, creating a radial fuel staging.
  • stratification means that at least two adjacent layers of mass flows are produced, for example, in the horizontal stratification, the alternating layers of burner airflow (eg injected via the top air nozzles, under air nozzles, intermediate air nozzles and center core air nozzles) and fuel flow, ie a line along the vertical different layers occur in the vertical stratification, alternating layers of fuel flow and side air flow, ie a line along the horizontal passes through different layers.
  • burner airflow eg injected via the top air nozzles, under air nozzles, intermediate air nozzles and center core air nozzles
  • fuel flow ie a line along the vertical different layers occur in the vertical stratification
  • alternating layers of fuel flow and side air flow ie a line along the horizontal passes through different layers.
  • grading means that within a mass flow, ie within a layer of the fuel flow or an air flow, there is a different density of the particles in a horizontal grading, or in a "radial grading" with respect to lying in a horizontal plane imaginary circle of fire, the concentration or density of the particles of the respective stream changes along a horizontal line.
  • concentration or density of the particles of the respective stream changes along a horizontal line.
  • burner air or “secondary air” refers to the air that is introduced into the combustion chamber by means of separate air slots or air nozzles immediately adjacent to the fuel slots or fuel nozzles. If air is used as the carrier medium or part of it for the fuel, and thus introduced via the fuel slots or fuel nozzles, this is referred to as primary air.
  • the additional burner air is introduced through horizontally extending rows of louvers or air nozzles in the firebox. These are arranged at least above the uppermost fuel slot and below the lower fuel slot. Thus, the fuel flow is limited by the burner air introduced through these horizontally extending rows of louvers or air nozzles above and below.
  • Coal dust or preferably a pulverized coal / flue gas mixture, in particular a brown coal dust / flue gas mixture is preferably introduced into the combustion chamber via the fuel slots.
  • the burner air flow is introduced via lateral air slots or air nozzles in the combustion chamber, wherein the distance between the center of the air slot and the air nozzle to the adjacent edge of the fuel slot is at most Vi the horizontal dimension of the fuel slot.
  • a helical, ascending flow is built up in the combustion chamber, wherein preferably introduced via the lateral louvers or air nozzles in the combustion chamber burner air flow is introduced relative to the direction of rotation of the helical flow leading to the fuel flow.
  • the vertical stratification between the fuel stream and the burner air stream is configured such that the layer of burner airflow passes between the wall of the furnace and the fuel stream, and the fuel stream passes between the burner air stream and the central longitudinal axis of the furnace.
  • a method is preferred in which the ratio of the vertical extent to the horizontal extent of the layer of the fuel stream of a Main burner at the exit into the combustion chamber at least 1, 0: 1, preferably at least 1, 5: 1, more preferably at least 2.0: 1, even more preferably at least 2.5: 1, more preferably at least 3.0: 1, still more preferably at least 3.5: 1 and more preferably at least 4.0: 1. These measures promote the formation of vertical stratification.
  • further burner air is introduced into the combustion chamber by means of one or more horizontal rows of louvers or air nozzles, whereby the fuel flow is divided horizontally by this burner air.
  • the amount of burner air introduced into the combustion chamber via the one or more horizontally extending rows of air slots or air nozzles increases in the direction of side air slots or side air nozzles.
  • a radial air staging is generated.
  • the air staging takes place on the burner from the furnace in the radial direction. This means that the side air is injected so that it forms a relative to the firing circle outside fog.
  • the injected air quantity is increased in the direction of rotation of the combustion chamber flow (ie towards the outside).
  • the radial air staging also provides a predominantly oxidizing atmosphere near the wall, which is an important criterion for suppressing corrosion. Oxygen, ie oxidizing conditions, on the wall prevent corrosion of the furnace walls.
  • the burner air is introduced by means of one or more horizontally extending rows of louvers or air nozzles in the combustion chamber, wherein the fuel flow is limited above and below, and optionally divided horizontally.
  • the amount of burner air introduced via these louvers or air nozzles increases from top to bottom, from bottom to top or from above and below in the direction of the center of the burner, ie it will be a generated vertical air grading. It is a vertical air staging, because along the vertical, the amount of injected air is varied.
  • This vertical air staging is preferably done together with the above-described radial air staging for advantageous operation in the burner.
  • different amounts of air are set in the sub-air, upper air and possibly intermediate air.
  • the sidewall air can also be varied over the height.
  • the exact setting depends on the fuel properties, such as fineness, water content and reactivity, but also on the geometry and flow of the furnace.
  • An advantageous setting can preferably be made so that the amount of air in the sub-air is set larger than in the intermediate air and the upper air. The reason for this is, depending on the reactivity of the coal and / or depending on the fineness of grinding, to increase the amount of under-air in order to reduce unburned particles falling into the hopper.
  • the burner allows a two-dimensional air staging (in radial and vertical direction) to allow optimal adaptation to the current fuel.
  • a radial fuel staging is performed, that is, the concentration of fuel flow increases along the horizontal, within the fuel flow along the horizontal from the side bounded by the side airflow to the opposite side.
  • the particle density in the fuel stream increases.
  • the radial fuel staging takes place counter to the direction of the radial air staging.
  • the difference in the concentration of the fuel at the fuel outlet (of the fuel slot) at the edge facing the side air stream is at least 5% compared to the opposite edge.
  • the design of the feed passage for the fuel outlet is carried out such that local local enrichment of the fuel particle stream takes place through the flow guide.
  • the formation of primary NOx is thus further suppressed.
  • the burner includes flow diversion means in the fuel slots or in the feed slots of the fuel slots to increase the concentration of fuel flow introduced through the fuel slots from the side of the side air slots or nozzles to the opposite side. In this case, a radial fuel staging is generated.
  • These means of flow diversion in the fuel slots or their feed channels are selected from the group consisting of i) a one-sided taper of the feed channel, the taper being located in the feed channel on the side adjacent to the side air slots; ii) harassment; iii) steering flaps; iv) curvature of the feed channel.
  • the particles are guided by flow deflection on the side of the burner, which is opposite to the side of the side air nozzles or the side air flow.
  • the mixing of the combustion air is delayed in the carrier gas fuel stream and it forms a more extensive degassing.
  • a zone of sub-stoichiometric combustion is formed.
  • the air flow introduced via the lateral air slots or air nozzles is aligned such that it is introduced into the combustion chamber at an angle of 2 ° to 20 °, preferably 5 ° to 15 °, away from the orientation of the fuel flow becomes. This also delays the mixing of the combustion air into the carrier gas fuel stream, which leads to a reduction in the production of NOx.
  • a further preferred measure results in a more extensive degassing zone with substoichiometric combustion, which leads to a reduction in the production of NOx.
  • the fuel flow at an angle of 2 ° to 30 °, preferably from 5 ° to 15 °, with respect to the horizontal inclined downwards introduced into the furnace.
  • the undefined ignition the unequal distribution of the fuel and the undefined mixing of the combustion air and their negative effects on the NO x -emissons can be eliminated.
  • the invention enables improved combustion with reduced NOx emissions by means of defined ignition, optimized air staging (radial and vertical), optimized combustion air interference in the carrier gas-dust jet, and radial fuel staging.
  • advantageous properties are achieved during operation by means of the above-mentioned measures, namely a reduction of local temperature peaks, and thereby a reduction of the slagging tendency and of the thermally formed NO x in the temperature peaks. Furthermore, an improvement of the wall atmosphere is effected by radial air curtain, whereby the tendency to corrosion of the furnace walls is reduced.
  • the method of the present invention results in optimizing the combustion process and reducing primary NOx emissions in the burner belt area.
  • the combustion air is essentially radially stepped.
  • the vertical stratification between coal dust flow and side air flow is the characterizing feature of the present invention.
  • the superposition of the radial air staging in the combustor and the vertical air staging in the furnace (via top air nozzles) ensures an even slower mixing effect of the air into the fuel jet and thus additional suppression of the primary NO x - formation.
  • the side air at the burner supplies the nearest evaporator walls with combustion air, so that moderate flue gas temperatures and a comparatively high O 2 wall atmosphere are established there. This significantly minimizes the risk of both wall corrosion and slagging in the burner belt area.
  • the upper, intermediate and sub-air is no longer introduced through slots, but through thermally stable tube constructions.
  • the fuel stream is introduced tangentially into the combustion chamber via one or more main burners, wherein the fuel stream or the partial fuel streams fed from a plurality of main burners are or are aligned with a combustion circuit in the combustion chamber.
  • burn-out air is supplied to ensure the burn-out of the fuel introduced into the combustion chamber above the supply of the fuel stream.
  • the combustion chamber has a rectangular, in particular a square cross-section, wherein the fuel flow in the form of a wall fire, preferably a Allwand85ung is introduced into the furnace.
  • a furnace wherein two or more burners according to the invention are arranged side by side per firebox wall.
  • two or more burners according to the invention are arranged one above the other per combustion chamber wall.
  • a first plane at least one burner according to the invention is preferably arranged per firebox wall, and in a second plane likewise at least one burner according to the invention is disposed per firebox wall, wherein the second plane is arranged above the first plane.
  • Each burner is a level aligned to a circle of fire, the circle of fire of the 1. Plane is offset to the circle of fire of the 2nd level along the vertical.
  • a firing is used, wherein in the furnace according to the described 1.
  • the inventive method for burning fuels leads to the reduction of nitrogen oxide pollution.
  • lignite dust is introduced via main burner tangentially into a rectangular or square combustion chamber and air vertically layered also introduced into the furnace.
  • combustion air is supplied to the implementation of the fuel above its supply. The supply of all reactants is done in such a way that a helical ascending flow is built up in the furnace. Due to the stepped supply of the reduction fuel, a combustion zone in the region of the main burners with substoichiometric combustion and a burn-out zone above the supply of the burn-out air are formed.
  • an additional air flow in the form of a corner fire is introduced into the firebox.
  • the fuel stream is passed to flame stabilizers (teeth) mounted directly on the fuel exit (coal dust exit) of the fuel slots.
  • flame stabilizers will serve to stably ignite the coal dust / air mixture.
  • the flame stabilizers serve to slow down the dust particles and create turbulence of the particles to accelerate the release of volatiles and to stabilize the ignition close to the exit of the burners.
  • the obstruction of the free cross-section of the fuel slot is from 5% to 50%.
  • the fuel stream is passed by ramps which are mounted directly on the fuel outlet of the fuel slots. These ramps serve to ensure the ignition of the fuel directly at the burner.
  • the ramps increasingly narrow the burner feed channel towards the exit.
  • the ramps provide a further increase in turbulence at the fuel outlet. They can be carried out either individually or together in combination with flame stabilizers.
  • the technical problem is further solved by a burner for a firing installation for introducing a stream of fuel, in particular a pulverized coal stream into a combustion chamber of the firing plant,
  • the burner has a fuel slot or a plurality of fuel slots arranged in a vertical plane
  • louvers or air nozzles are disposed at least above and below the fuel slots
  • burner in the fuel slots or their supply channels includes means for flow deflection.
  • the burner has a fuel slot or a plurality of fuel slots arranged in a vertical plane
  • One or more horizontal rows of louvers or air nozzles are arranged at least above and below the fuel slots, for limiting the flow of fuel up and down by means of burner air,
  • louvers or air nozzles are arranged, which extend at least over the entire vertical extent of all fuel slots of the burner, for introducing burner air into the furnace and for the vertical limitation of the fuel flow on one side by means of a side air stream;
  • the burner in the fuel slots or their supply channels includes means for flow deflection, to increase the concentration of the fuel flow introduced through the fuel slots from the side of the side air slots or air nozzles to the opposite side, wherein a radial fuel staging is generated.
  • the "one-sided" arrangement of the louvers or air nozzles means that such side louvers or nozzles are arranged only on one side of the burner or the fuel slots or nozzles, and not on both sides.
  • the means for directing the flow in the fuel slots or their supply passages may be of any configuration, as appropriate, the concentration of fuel flow introduced through the fuel slots along a horizontal axis, i.e., the fuel flow. from one side of the fuel outlet to the other, or to create a horizontally extending fuel gradient.
  • these means are selected from the group consisting of i) a one-sided taper of the feed channel, the taper being located in the feed channel on the side adjacent to the side air slots;
  • the fuel slots preferably have a rectangular or square shape.
  • the main burner is configured such that at least 20%, preferably at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 85%, at least 90%, at least 95% of the air flow introduced through the burner through the side louvers or air nozzles.
  • the lateral louvers or air nozzles are arranged so that the distance between the center of the louver or the air nozzle to the adjacent edge of the fuel slot is at most Vi the horizontal dimension of the fuel stoffschl itzes.
  • the ratio of the vertical extent to the horizontal extent of the entirety of the fuel slots of the burner is at least 1.0: 1, preferably at least 1.5: 1, more preferably at least 2.0: 1, even more preferably at least 2 , 5: 1, more preferably at least 3.0: 1, even more preferably at least 3.5: 1 and most preferably at least 4.0: 1.
  • the orientation of the lateral air slots or air nozzles is inclined by an angle of 2 ° to 20 °, preferably from 5 ° to 15 ° away from the fuel slots.
  • burners wherein one or more horizontal rows of air slots or air nozzles are arranged between the fuel slots, for the horizontal subdivision of the fuel flow of a burner by means of burner air.
  • the burner is configured so that the burner air is introduced by means of one or more horizontally extending rows of louvers or air nozzles in the firebox, wherein the fuel flow is divided horizontally and limited above and below, and in particular configured so that the over this air slits or air nozzles introduced amount of air increases in the direction 9.l Kunststoffschlitze- or nozzles, with a radial air staging is generated.
  • the burner is configured such that the burner air is conveyed by means of one or more horizontally extending rows of air. slits or air nozzles is introduced into the combustion chamber, wherein the fuel flow is divided horizontally and limited above and below, and in particular configured so that the introduced via these louvers or air nozzles amount of air from top to bottom, from bottom to top or from increases up and down toward the center of the burner, creating a vertical air staging.
  • the burner according to the present invention eliminates the undefined ignition, the unequal distribution of the fuel and the undefined mixing of the combustion air and its negative effects on the NO x -emissons.
  • the invention provides an improved burner of the "jet burner” type with reduced NO x emissions by means of defined ignition, optimized air staging (radial and vertical), optimized combustion air mixing in the carrier gas dust jet and radial fuel staging
  • the burner according to the invention achieves advantageous properties during operation by means of the abovementioned measures, namely a reduction in local temperature peaks and thereby a reduction in the tendency to shrinkage and of the NO x thermally formed in the temperature peaks the tendency to corrosion of the furnace walls is reduced.
  • the burner flame stabilizers are attached to the ignition of the fuel at the outlets of the individual fuel slots. These flame stabilizers are used for stable ignition of the coal dust / air mixture.
  • the stabilizers serve to slow down the dust particles and generate turbulence of the particles to accelerate the release of volatiles and to stabilize the ignition close to the exit of the burners.
  • the flame stabilizers are attached to the fuel outlet of the fuel slots and protrude into the cross section of the fuel slot.
  • the shape of the flame stabilizers is not limited. Thus, the flame stabilizers may have a rounded, rectangular or square shape.
  • the different tooth shapes serve in principle the same purpose, namely by generating local turbulence to favor the ignition (flame holder).
  • the flame stabilizers are provided with a support rib or stiffening rib on the side facing away from the firebox.
  • This rib fulfills two main tasks, namely i) the stiffening of the flame stabilizer from a constructive point of view, and ii) the removal or dissipation of heat.
  • the flame stabilizer is exposed to large thermal radiation from the furnace. Although cooling takes place due to the continuous flow of carrier gas / fuel mixture. Nevertheless, the rib provides better heat dissipation. This is particularly important when the burner is out of operation, so no cooling is done by the carrier gas / fuel mixture. In the case where the burner is out of operation, then usually abandoned amounts of cooling air are comparatively small, so that the improved heat dissipation through the rib is required.
  • the flame stabilizers may be placed on all edges of the exit of the rectangular or square fuel slot, i) on the upper horizontal; ii) at the lower horizontal; iii) at the vertical to the side air; iv) on the vertical side air. It is also possible not to equip individual edges with flame stabilizers.
  • the flame stabilizers are placed at the following edges of the exit of the rectangular or square fuel slot: i) at the upper horizontal; ii) at the lower horizontal; iii) at the vertical adjacent to the side air jets; iv) at the vertical relative to the soluftdüsen- or -Schlitzen, particularly preferably in particular at the vertical relative to the Soluftdüsen- or Slots.
  • the flame stabilizers are attached to the vertical adjacent the side air jets throughout, while the flame stabilizers are adjacent to the upper horizontal and lower horizontal adjacent the edge over the entire edge distributed to the soluftdü- sen- or -Slots are not continuously attached. This situation is shown in FIG. 9B.
  • ramps are preferably attached to the fuel outlet, which increasingly narrow the burner inlet channel in the direction of exit.
  • the ramps provide a further increase in turbulence at the fuel outlet. They can be carried out either individually or together in combination with flame stabilizers.
  • the ramps can also be mounted horizontally and vertically at the coal dust outlet. In Figure 1 1, an application example of the ramps is shown. The ramps are in this case individually and attached to the horizontally extending edges of the fuel outlet.
  • the technical object is further achieved by a firing system for the combustion of solid, liquid or gaseous fuels, in particular pulverized coal, wherein at least one burner per combustion chamber wall according to the present invention, as described above, is arranged and aligned these burners tangentially to a combustion circuit in the furnace are.
  • the main burners used in the furnace have a fuel slot or a plurality of fuel slots arranged in a vertical plane,
  • one or more horizontal rows of louvers or air nozzles are arranged at least above and below the fuel slots, for limiting the fuel flow up and down by means of burner air, wherein one side of the fuel slots louvers or air nozzles are arranged, which extend at least over the entire vertical extent of all the fuel slots extending the burner, for introducing burner air into the combustion chamber and for the vertical limitation of the fuel flow on one side by means of the burner air;
  • the burner in the fuel slots or their supply channels includes means for flow deflection to increase the concentration of the fuel flow introduced through the fuel slots from the side of the side air slots or air nozzles to the opposite side, wherein a radial Brennstoffstu- tion is generated.
  • the firing system has a rectangular, in particular a square cross-section, wherein at least one wall, preferably at least two opposite walls, more preferably all walls of the firebox are each equipped with at least one main burner, preferably two juxtaposed main burners.
  • the burners are tangentially aligned with a combustion circuit in the combustion chamber.
  • the furnace is configured so that when operating in the furnace a helical, ascending flow is established, based on the sense of rotation of the helical Flow of the introduced via the side louvers or air nozzles in the combustion chamber side air flow leading to the fuel flow is introduced.
  • the vertical stratification between the fuel stream and the side air stream is constructed such that the layer of side airflow passes between the wall of the furnace and the fuel stream, and the fuel stream runs between the side airstream and the central longitudinal axis of the furnace.
  • the burners are preferably oriented at an angle of 2 ° to 30 °, preferably from 5 ° to 15 °, with respect to the horizontal inclined downwards.
  • two or more burners according to the invention are arranged next to one another per combustion chamber wall. In another preferred embodiment, two or more burners according to the invention are arranged one above the other per combustion chamber wall.
  • At least one burner according to the invention is preferably arranged per firebox wall, and in a second plane likewise at least one burner according to the invention is disposed per firebox wall, wherein the second plane is arranged above the first plane.
  • Each burner is a level aligned to a circle of fire, the circle of fire of the 1. Plane is offset to the circle of fire of the 2nd level along the vertical.
  • In further preferred embodiments are in the furnace according to the described 1. or 2nd level further levels arranged with the burners according to the invention.
  • two or more burners according to the invention are arranged side by side per firebox wall, and preferably also in a second plane, two or more burners according to the invention are arranged above the first plane.
  • Each burner is one level on a circle of fire aligned, with the circle of fire of 1. Plane is offset to the circle of fire of the 2nd level along the vertical.
  • 2nd level further levels arranged with the burners according to the invention.
  • the main burner (s) are configured such that at least 20%, preferably at least 30%, at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 85%, at least 90%, at least 95% of the air flow introduced via a main burner is introduced into the combustion chamber via the side air slots or air nozzles, so that a vertical stratification between the fuel flow and the side air flow is generated.
  • the lateral louvers or air nozzles arranged so that the distance between the center of the louver and the air nozzle to the adjacent edge of the fuel slot is at most Vi the horizontal dimension of the fuel material slot.
  • the ratio of the vertical extent to the horizontal extent of the entirety of the fuel slots of a main burner exiting the furnace is at least 1.0: 1, preferably at least 1.5: 1, at least 2.0 : 1, at least 2.5: 1, more preferably at least 3.0: 1 and even more preferably at least 3.5: 1 and most preferably at least 4.0: 1.
  • this is configured so that the burner air is introduced by means of one or more horizontally extending rows of louvers or air nozzles in the furnace, the fuel flow is divided horizontally and limited above and below, and in particular configured in that the amount of air introduced via these air vents increases in the direction of side air vents or nozzles, creating a radial air staging.
  • this is configured so that the burner air is introduced by means of one or more horizontally extending rows of louvers or air nozzles in the furnace, the fuel flow is divided horizontally and limited above and below, and in particular configured in that the quantity of air introduced via these louvers or air nozzles increases from top to bottom, from bottom to top or from top to bottom in the direction of the center of the burner, producing a vertical air staging.
  • burn-out air nozzles for introducing burn-out air into the furnace are arranged above the main burners.
  • additional air nozzles are arranged in the corners of the firebox, which is also referred to as corner firing.
  • flame stabilizers are attached to the ignition of the fuel at the outlets of the individual fuel slots.
  • These flame stabilizers are used for stable ignition of the coal dust / air mixture.
  • the stabilizers serve to slow down the dust particles and create turbulence of the particles to accelerate the release of volatiles and to stabilize the ignition close to the exit of the burners.
  • the shape of the flame stabilizers is not limited.
  • the flame stabilizers may have a rounded, rectangular or square shape.
  • the fuel slots in the furnace around the entire edge of the exit of the fuel slots around flame stabilizers.
  • Figure 1 shows a schematic representation of a burner mirror of the prior art seen from the furnace.
  • Figure 2 shows a schematic representation of a burner mirror according to the present invention seen from the firebox.
  • Figure 3 shows a schematic representation of a burner mirror according to the present invention seen from the combustion chamber in which the radial air staging is explained.
  • Figure 4 shows a schematic representation of a burner mirror according to the present invention seen from the firebox in which the vertical air staging is explained.
  • Figure 5 shows the radial fuel staging of the burner set in a preferred process according to the present invention.
  • Figure 6 shows a cross-sectional view of a firebox in a schematic representation with identification of the flow directions of the introduced into the combustion chamber fuel and the injected into the firebox air.
  • FIG. 7 shows different geometries of flame stabilizers.
  • FIG. 8 shows further embodiments of flame stabilizers.
  • FIG. 9 shows possible arrangements of flame stabilizers at the fuel outlet.
  • FIG. 10 shows different geometries of flame stabilizers at a fuel outlet.
  • FIG. 11 shows the functioning of ramps at the outlets of the fuel nozzles.
  • the conventional burner 1 shown in FIG. 1 has two burner fingers, an upper burner finger 1 a and a lower burner finger 1 b.
  • the fuel slots are designated 2. Rows of central core air pipes 3 split the burner fingers horizontally into two burner half-fingers. Between the upper burner finger and the lower burner finger, an intermediate air slot 5 is arranged, while an upper air slot 4, the fuel slots up and an under air slot 6, the fuel slots down limited.
  • the main secondary air flow is injected above, below and below the fuel flow.
  • This type of burner of the prior art is characterized by the horizontal stratification of coal dust flow and main secondary air flow.
  • the burner 1 shown in FIG. 2 represents an embodiment of the present invention.
  • the embodiment shown in FIG. 2 has two burner fingers, an upper burner finger 1 a and a lower burner finger 1 b.
  • the fuel slots are designated 2.
  • the individual fuel slots 2 are separated from one another by rows of center core air nozzles 9 or intermediate air nozzles 13.
  • a series of top air nozzles 8 limits the fuel slots 2 upwards and a row of under air nozzles 10 down the fuel slots.
  • louvers or air nozzles 1 1 are arranged according to the present invention. These extend over at least the entire vertical extent of the burner 1 and serve to supply side air.
  • the burner 1 is configured so that at least 20% of the air flow introduced through the burner is introduced into the furnace via the side air slots 11 or air nozzles to create a vertical stratification between fuel flow and main secondary air flow.
  • the lateral louvers 1 1 or air nozzles are preferably arranged so that the Distance between the center of the louver 1 1 to the adjacent edge of the fuel slot 2 is at most Vi the horizontal dimension of the fuel slot 2.
  • a helical, ascending flow is built up in the furnace. Based on the direction of rotation of the helical flow, the side airflow conducted via the lateral air slots 11 is introduced into the combustion chamber in advance of the fuel flow.
  • the vertical stratification of fuel flow and side airflow according to the present invention is such that the layer of side airflow passes between the wall of the furnace and the fuel stream, and the fuel stream runs between the side airflow and the central longitudinal axis of the furnace.
  • the vertical extent of the fuel slots of the burner at the exit into the combustion chamber is preferably a multiple of the horizontal extent of the fuel slots, namely here about a factor of 4.
  • flame stabilizers 12 are attached to the outlets of the individual fuel slots 2 to ignite the fuel. These flame stabilizers are used for stable ignition of the coal dust / air mixture.
  • the flame stabilizers are attached to the fuel outlet of the fuel slots 2 and protrude into the cross section of the fuel slot.
  • flame holders 12 are mounted along all four edges of the fuel slots 2.
  • FIG 3 the radial air staging of the burner, which is set in a preferred method according to the present invention, is explained.
  • a portion of the burner air is introduced by means of one or more horizontally extending rows of air nozzles 8, 9, 10 in the furnace. Characterized the introduced through the fuel slots 2 fuel flow is divided horizontally and limited above and below.
  • the over these air nozzles 8, 9, 10 introduced Air quantity in the direction of soluftschlitze- or nozzles 1 1 towards, ie it is generated a radial air grading.
  • the air in the side is injected in such a way that it forms a veil on the outside of the circle of fire.
  • the amount of air injected via the horizontally extending rows of burner air nozzles 8, 9, 10 is increased in the direction of rotation of the combustion chamber flow (ie, outward or in the direction of side air nozzles 11).
  • the increasing amount of air or radial air grading is shown schematically by the wedge at the top of the figure.
  • two flame stabilizers 12 are attached to only three edges of the fuel slots 2 at the exit of the fuel slots 2.
  • Fig. 4 the vertical air staging of the burner set in a preferred method according to the present invention will be explained.
  • the burner air is introduced by means of one or more horizontally extending rows of air nozzles 8, 9, 10 in the furnace. In this way, the introduced through the fuel slots 2 fuel flow is divided horizontally and limited above and below.
  • the quantity of air introduced via these air nozzles 1 1 increases from top to bottom.
  • the different amount of air or the vertical gradation of the amount of air is shown schematically by the bar on the right side of the figure.
  • Figure 5 shows in the left part of the figure, the burner mirror seen from the firebox.
  • the right part of the figure represents a sectional view along the drawn in the left part of the figure CC level.
  • the side air nozzle is represented by 1 1.
  • the axis of the side air nozzle 1 1 is inclined away from the axis of the fuel supply channel 2.
  • the fuel flow increases from the side airflow side to the opposite side.
  • the design of the feed channel 2 to the burner is designed so that a local accumulation of the fuel particle stream is carried out by the flow guide. This can be achieved, for example, with a beginning of a shoulder 20 narrowing of the fuel supply channel 2, which is arranged on the side of the fuel supply channel, which is adjacent to the side air duct 1 1.
  • the particles are guided by flow deflection on the side of the burner, which is opposite to the side of the side air nozzles or the side air flow.
  • the radial fuel flow is schematically represented by the bar on the lower side of the figure.
  • FIG. 6 shows a cross-sectional view of a combustion chamber 18 in a schematic illustration with identification of the flow directions of the fuel introduced into the combustion chamber 18 (thick arrow) and the side air blown into the combustion chamber (thin arrow).
  • the burners 1 are designed to be identical to one another and the burners are illustrated by their burner mirrors 1 as an example. Downstream of the burner creates an air curtain on the burner wall.
  • the arrangement of the burner on the combustion chamber 18 follows here the principle of tangential firing. In this case, the burners 1 fire from the wall 14 (or from the corners, not shown in Figure 6) tangentially to an imaginary circle, the so-called burning circle or fire circle.
  • the vertical stratification between fuel flow and side airflow is configured such that the layer of side airflow between the wall of the furnace and the fuel stream, and the fuel flow between the side airflow and the central longitudinal axis of the fuel Firebox runs.
  • the figure 6 is further shown schematically by means of the solid arrows coming from the direction of the burner, that in preferred embodiments, the axis of the side air flow (thin arrow) from the axis of the fuel flow (thick arrow) is inclined away.
  • FIG. 7 shows different geometries of flame stabilizers (a, b, c: flame stabilizers in front view).
  • flame stabilizers (teeth) are attached to the outlets of the individual fuel slots to ignite the fuel. These flame stabilizers are used for stable ignition of the coal dust / air mixture. The stabilizers serve to slow down the dust particles and generate turbulence of the particles to accelerate the release of volatiles and to stabilize the ignition close to the exit of the burners.
  • the shape of the flame stabilizers is not limited. Thus, the flame stabilizers may have a rounded, rectangular or square shape.
  • a1 and a2 further embodiments of the flame stabilizers 12 are shown.
  • the flame stabilizers 12 are provided with a support rib or stiffening rib 15 on the side facing away from the firebox. This rib is used for stiffening from a constructive point of view and the dissipation of heat.
  • FIG. 8 shows further embodiments of the flame stabilizers 12.
  • the flame stabilizers 12 are provided with a support rib or stiffening rib 15 on the side remote from the firebox.
  • FIG. 9 explains possible arrangements of flame stabilizers at the fuel outlet.
  • the flame stabilizers 12 may be disposed on all edges of the exit of the rectangular or square fuel slot 2: at the upper edge; at the bottom edge; at the vertical edge adjacent to the side air; on the vertical edge opposite the side air. It is also possible not to provide individual edges with flame stabilizers, as shown in FIGS. 9A and 9B.
  • the flame stabilizers 12 are continuously connected to the upper and lower horizontal on the same ben distributed over the entire edge, while the flame stabilizers 12 on the vertical adjacent to the Soluftdüsen- or -Slitzen 1 1 are not continuously distributed (Figure 9 A).
  • the flame stabilizers 12 are mounted on the vertical adjacent to the side air nozzle slots 1 1 throughout the same throughout the edge, while the flame stabilizers 12 adjoin the upper horizontal and lower horizontal towards the edge are not continuously distributed to the So Kunststoffdüsen- or -Slitzen (Figure 9 B).
  • FIG. 10 shows an embodiment in which flame stabilizers 12 of different geometries are attached to a fuel outlet 2.
  • FIG. 11 shows the mode of operation of ramps 7 at the outlets of the fuel nozzles.
  • the left part of the figure shows a section along the registered in the right part of the axis A-A.
  • a portion of the burner air is introduced by means of one or more horizontally extending rows of air nozzles 8, 9, 10 in the furnace.
  • the fuel flow is divided horizontally and limited above and below.
  • ramps 7 are preferably attached to the fuel outlet 2. These ramps 7 provide a further increase in turbulence at the fuel outlet (shown in the left part of the figure).
  • the figure shows an embodiment in which the ramps 7 are mounted on the upper and lower edges, while the flame stabilizers 12 are arranged only on the vertical edges.
  • the burner type according to the present invention leads to an optimization of the combustion process and to the reduction of the primary NO x emissions in the burner belt area.
  • the combustion air is essentially stepped radially.
  • the characterizing feature of the present invention is the vertical stratification between coal dust flow and side air flow. The superimposition of the radial air staging in the burner and the vertical air staging in the combustion chamber (via top air nozzles) still ensures slower mixing effect of the air in the fuel jet and thus an additional suppression of primary NO x formation.
  • the side air on the burner supplies the adjacent evaporator walls with combustion air, so that there moderate flue gas temperatures and a relatively high O2 wall atmosphere prevail.
  • the furnace or the burner according to the present invention form in the furnace from bottom to top, a main burner combustion zone and the application of burnout air supply a burn-out.
  • a tangential firing is used with a plurality of main burners aligned on a combustor, and preferably a plurality of burnout air nozzles located above the main burners.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

La présente invention concerne un procédé de combustion de combustibles solides, liquides ou gazeux, en particulier de charbon pulvérisé, selon lequel le flux de combustible est introduit dans le foyer (18) et brûlé par l'intermédiaire d'un ou de plusieurs brûleurs principaux, le flux de combustible de chaque brûleur principal étant introduit dans le foyer par l'intermédiaire d'une fente pour combustible (2) ou par l'intermédiaire de plusieurs fentes pour combustible (2) ménagées dans un plan vertical, de l'air de brûleur additionnel étant introduit dans le foyer par l'intermédiaire de fentes de passage d'air ou de buses d'air, une partie de l'air de brûleur additionnel étant introduite dans le foyer au moyen de rangées horizontales de fentes de passage de l'air ou de buses d'air (8, 10), le flux de combustible étant délimité au-dessus et au-dessous par l'air de brûleur introduit par ces fentes de passage de l'air ou ces buses d'air, un autre air de brûleur pouvant être introduit dans le foyer au moyen d'une ou de plusieurs rangées horizontales de fentes de passage de l'air ou de buses d'air (9, 13), le flux de combustible étant divisé horizontalement par cet air de brûleur, l'autre partie de l'air de brûleur étant introduite dans le foyer par l'intermédiaire de fentes de passage de l'air ou de buses d'air (11) disposées d'un seul côté, qui s'étendent sur toute l'extension verticale de toutes les fentes de passage de l'air du brûleur principal, et délimitant verticalement sur une face le flux de combustible de chaque brûleur principal et un flux d'air latéral étant ainsi formé, au moins 20% de l'air de brûleur introduit par l'intermédiaire du brûleur principal étant introduits dans le foyer par l'intermédiaire d'un brûleur principal par les fentes de passage de l'air ou les buses d'air latérales du brûleur principal, de sorte à former une disposition verticale par couches entre le flux de combustible et le flux d'air de brûleur et la concentration du flux de combustible augmentant de la face du flux d'air latéral jusqu'à la face opposée, ce qui donne lieu à un étagement radial du combustible. L'invention concerne en outre un brûleur (1) et une installation de chauffe.
PCT/EP2017/058301 2016-04-08 2017-04-06 Procédé de combustion à faible taux en émissions d'oxyde d'azote de combustibles solides, liquides ou gazeux, en particulier de charbon pulvérisé, brûleur et installation de chauffe pour mettre ledit procédé en oeuvre Ceased WO2017174751A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16164523.9 2016-04-08
EP16164523.9A EP3228935B1 (fr) 2016-04-08 2016-04-08 Procédé de combustion pauvre en oxyde d'azote de combustibles gazeux, solides ou liquides, en particulier de poussière de charbon, brûleur et installation de combustion destinée a exécuter le procédé

Publications (1)

Publication Number Publication Date
WO2017174751A1 true WO2017174751A1 (fr) 2017-10-12

Family

ID=55701860

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/058301 Ceased WO2017174751A1 (fr) 2016-04-08 2017-04-06 Procédé de combustion à faible taux en émissions d'oxyde d'azote de combustibles solides, liquides ou gazeux, en particulier de charbon pulvérisé, brûleur et installation de chauffe pour mettre ledit procédé en oeuvre

Country Status (3)

Country Link
EP (1) EP3228935B1 (fr)
PL (1) PL3228935T3 (fr)
WO (1) WO2017174751A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111156501A (zh) * 2020-01-02 2020-05-15 袁东辉 中心筒、形成中心筒的方法、分离器、循环流化床锅炉

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890254C (de) * 1950-03-05 1953-09-17 Kohlenscheidungs Ges M B H Verfahren und Einrichtung zum Betrieb von Kohlenstaubfeuerungen fuer Hochleistungs-Dampfkessel
EP0022454A2 (fr) * 1979-07-12 1981-01-21 Combustion Engineering, Inc. Four avec des jeux d'ajutages pour l'introduction tangentielle de charbon pulvérisé, d'air et de gaz de recyclage
DE3531571A1 (de) * 1985-09-04 1987-03-05 Steinmueller Gmbh L & C Verfahren zum verfeuern von brennstoffen unter reduzierung der stickoxidbelastung und feuerung zur durchfuehrung des verfahrens
EP0405294A2 (fr) * 1989-06-24 1991-01-02 Balcke-Dürr AG Dispositif de combustion des combustibles dans une chambre de combustion
US5020454A (en) * 1990-10-31 1991-06-04 Combustion Engineering, Inc. Clustered concentric tangential firing system
US5799594A (en) * 1993-11-08 1998-09-01 Ivo International Oy Method and apparatus for reducing nitrogen oxide emissions from burning pulverized fuel
US6138588A (en) * 1999-08-10 2000-10-31 Abb Alstom Power Inc. Method of operating a coal-fired furnace to control the flow of combustion products
DE10301316B3 (de) * 2003-01-15 2004-08-05 Alstom Power Boiler Gmbh Verfahren und Vorrichtung zum NOx-armen Verbrennen von Brennstoffstaub
US20060191451A1 (en) * 2005-02-25 2006-08-31 Clean Combustion Technologies Llc Combustion method and system
CN103134049B (zh) * 2011-11-22 2015-09-30 中国科学院过程工程研究所 一种多角切圆多尺度煤粉解耦燃烧装置及其解耦燃烧方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933528A1 (de) 1979-08-18 1981-03-26 Deutsche Babcock AG, 46049 Oberhausen Vorrichtung zum abtrennen von brueden
DE3731271C2 (de) 1987-09-17 1996-09-05 Babcock Energie Umwelt Vorrichtung und Verfahren zum Verfeuern hochballasthaltiger Braunkohle
DE4407198A1 (de) 1994-03-04 1995-09-07 Lentjes Kraftwerkstechnik Braunkohlenbrenner
DE19514302C2 (de) 1995-04-25 2001-11-29 Alstom Power Boiler Gmbh Verfahren und Feuerungssystem zur stickoxidarmen Wärmeerzeugung
EP1731832A1 (fr) 2005-06-11 2006-12-13 Vattenfall Europe Generation AG & Co. KG Arrangement d'un brûleur à jet pour la combustion du charbon pulvérisé dans une chambre de combustion à émission réduite de NOx

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890254C (de) * 1950-03-05 1953-09-17 Kohlenscheidungs Ges M B H Verfahren und Einrichtung zum Betrieb von Kohlenstaubfeuerungen fuer Hochleistungs-Dampfkessel
EP0022454A2 (fr) * 1979-07-12 1981-01-21 Combustion Engineering, Inc. Four avec des jeux d'ajutages pour l'introduction tangentielle de charbon pulvérisé, d'air et de gaz de recyclage
DE3531571A1 (de) * 1985-09-04 1987-03-05 Steinmueller Gmbh L & C Verfahren zum verfeuern von brennstoffen unter reduzierung der stickoxidbelastung und feuerung zur durchfuehrung des verfahrens
EP0405294A2 (fr) * 1989-06-24 1991-01-02 Balcke-Dürr AG Dispositif de combustion des combustibles dans une chambre de combustion
US5020454A (en) * 1990-10-31 1991-06-04 Combustion Engineering, Inc. Clustered concentric tangential firing system
US5799594A (en) * 1993-11-08 1998-09-01 Ivo International Oy Method and apparatus for reducing nitrogen oxide emissions from burning pulverized fuel
US6138588A (en) * 1999-08-10 2000-10-31 Abb Alstom Power Inc. Method of operating a coal-fired furnace to control the flow of combustion products
DE10301316B3 (de) * 2003-01-15 2004-08-05 Alstom Power Boiler Gmbh Verfahren und Vorrichtung zum NOx-armen Verbrennen von Brennstoffstaub
US20060191451A1 (en) * 2005-02-25 2006-08-31 Clean Combustion Technologies Llc Combustion method and system
CN103134049B (zh) * 2011-11-22 2015-09-30 中国科学院过程工程研究所 一种多角切圆多尺度煤粉解耦燃烧装置及其解耦燃烧方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111156501A (zh) * 2020-01-02 2020-05-15 袁东辉 中心筒、形成中心筒的方法、分离器、循环流化床锅炉

Also Published As

Publication number Publication date
EP3228935B1 (fr) 2019-10-16
EP3228935A1 (fr) 2017-10-11
PL3228935T3 (pl) 2020-05-18

Similar Documents

Publication Publication Date Title
DE69107857T2 (de) Feuerungssystem mit mehrfachbrennern und mit tangentialer luftzufuhr konzentrisch zum zentralteil des feuerraumes.
DE68912401T2 (de) Brenner für staubförmigen Brennstoff.
DE3306483C2 (fr)
DE69735965T2 (de) Brenner
DE69516939T2 (de) Kohlenstaubbrenner
DE69614547T2 (de) Brenner
DE69409058T2 (de) Verfahren zum betrieb eines integrierten tangential-feuerungssystems mit niedrigem nox-gehalt
DE69923797T2 (de) Verfahren zum betrieb eines tangentialen feuerungssystems
DE69925176T2 (de) Verfahren zur Verbrennung von Kohlenstaub
DE3330373C2 (de) Verfahren und Vorrichtung zum Verbrennen von Kohle
DE69009686T2 (de) Verbrennungsverfahren.
DE3116376C2 (fr)
DE2658847A1 (de) Brennereinrichtung
DE60120787T2 (de) Kombiniertes wirbelbett- und kohlenstaubverbrennungsverfahren
EP2691701B1 (fr) Procédé d'optimisation de la combustion totale des gaz d'échappement d'une installation de combustion
DE2534438A1 (de) Verfahren und vorrichtung zur kalzinierung von zementmaterial
EP3228935B1 (fr) Procédé de combustion pauvre en oxyde d'azote de combustibles gazeux, solides ou liquides, en particulier de poussière de charbon, brûleur et installation de combustion destinée a exécuter le procédé
EP1754937B1 (fr) Tête de brûleur et procédé pour brûler du combustible
EP0105081A2 (fr) Dispositif de chauffage
EP1026465B1 (fr) Installation pour le traitement thermique de matières premières en poudre
DE2424069C2 (de) Verfahren zum Verbrennen von staubförmigem organischen Brennstoff
DE4211839C2 (de) Verfahren und Vorrichtung zur Regelung des Abbrandes fester Brennstoffe in einer Verbrennungsanlage
EP1352197B1 (fr) Bruleur pour la combustion de combustible pulverulent
WO1987006677A1 (fr) Procede et installation de reduction des emissions d'oxyde nitrique lors de la combustion de combustibles solides
DE3434970A1 (de) Einrichtung zur minderung der feststoffpartikel- und schadstoff-anteile im zwangsgefoerderten abgasstrom aus der verbrennung von kohlenstoffhaltigen feststoffen in einem reaktorbett

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17716206

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17716206

Country of ref document: EP

Kind code of ref document: A1