EP0874196A2 - Procédé et dispositif pour enlever les dépots dans des buses ou des tubes d'amenée dans les installations de combustion - Google Patents

Procédé et dispositif pour enlever les dépots dans des buses ou des tubes d'amenée dans les installations de combustion Download PDF

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Publication number
EP0874196A2
EP0874196A2 EP98105977A EP98105977A EP0874196A2 EP 0874196 A2 EP0874196 A2 EP 0874196A2 EP 98105977 A EP98105977 A EP 98105977A EP 98105977 A EP98105977 A EP 98105977A EP 0874196 A2 EP0874196 A2 EP 0874196A2
Authority
EP
European Patent Office
Prior art keywords
feed
medium
deposits
lance
nozzles
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.)
Granted
Application number
EP98105977A
Other languages
German (de)
English (en)
Other versions
EP0874196B1 (fr
EP0874196A3 (fr
Inventor
Johannes Josef Edmund Dipl.-Ing. Martin
Peter Spichal
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.)
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
Martin GmbH fuer Umwelt und Energietechnik
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 Martin GmbH fuer Umwelt und Energietechnik filed Critical Martin GmbH fuer Umwelt und Energietechnik
Publication of EP0874196A2 publication Critical patent/EP0874196A2/fr
Publication of EP0874196A3 publication Critical patent/EP0874196A3/fr
Application granted granted Critical
Publication of EP0874196B1 publication Critical patent/EP0874196B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices or arrangements for removing water, minerals or sludge from boilers ; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • 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 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/101—Furnace arrangements with stepped or inclined grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/00001—Exhaust gas recirculation

Definitions

  • the invention relates to a method for removal of deposits in and on feed nozzles or feed pipes of combustion plants in which recirculated Exhaust gas that is fed back into a combustion chamber will fix these deposits, taking care of the deposits applied a liquid or vapor medium becomes.
  • the invention also relates to a device for carrying it out of the procedure.
  • exhaust gas after a certain cooling (e.g. in a steam generator) or the exhaust gas from the appropriate areas Withdrawn from the combustion chamber and via feed nozzles or feed pipes fed back into the combustion chamber.
  • the reasons for the recirculation of exhaust gas can in the pursuit a high thermal efficiency of the plant, in the generation particularly high turbulence in the area of the secondary combustion zone, in exploiting the still in the exhaust existing oxygen and for regulating the oxygen content be seen in the secondary combustion zone.
  • the exhaust gas is preferably after one of the heat use downstream exhaust gas cleaning system, e.g. the dedusting device, deducted. But it can also be from the can be taken from the rear of the combustion chamber, in which there is already largely burnt out fuel and therefore the exhaust gases are still relatively high Have oxygen content.
  • the feed nozzles or feed pipes which are also for the Supply of secondary air can serve in the area of their Outlet opening through deposits originating from the exhaust gas, be gradually added so that at certain time intervals these deposits need to be removed to keep the free Outlet cross section of the feed nozzles or feed pipes restore. So far, the removal of Deposits mechanically by knocking off or repelling them by means of appropriate poles, which is not only tedious and is time-consuming, but is therefore also unsatisfactory, because the extremely strongly adhering deposits only from the firebox forth can be completely removed what the parking and cooling of the affected system.
  • This Deposits occur in the area of the mouth of the feed nozzles or feed pipes both inside these feed nozzles and feed pipes as well as on the immediate outer surfaces adjacent to the mouth. you will be caused by the strong heat radiation from the firebox, taking this heat radiation to a glazing of the deposits in the part of the furnace facing the furnace Baking and thus a particularly good adhesion and resistant structure that leads in a mechanical way is difficult to destroy.
  • the object of the invention is a method and an apparatus provide with the help of which it is possible to remove these deposits in a simple way during normal operation to remove the combustion system practically residue-free.
  • liquid medium sprayed onto the deposits in droplet form is that the medium in the flow direction of the exhaust gases inside the feed nozzles or feed pipes starting with that in the flow direction of the exhaust gases within of the feed nozzles or the feed pipes leading edge the deposits are applied to them.
  • a liquid medium in particular Water
  • the liquid Medium quickly penetrates the inside of the deposits.
  • heat from the combustion chamber or from the circulated Gas flow evaporates this into the pores of the hygroscopic Deposits of water explosive.
  • the deposits are blown up from the inside. This will not only remove the deposits on the inner wall the feed nozzles or the feed pipes removed, but also around the mouth area to the outside.
  • the task at the beginning can also be solved in that the vaporous medium in Direction of flow of the exhaust gases within the feed nozzles or the feed pipes starting with that in the direction of flow the exhaust gases inside the supply nozzles or the feed pipes front edge of the deposits is applied to this. It is crucial indicates that the vaporous medium after its penetration a rapid increase in volume in the pores of the deposits learns what is the case when the vapor Medium is water vapor. When using water vapor Expect a longer treatment time (a few minutes up to about 1 hour) because of the increase in the specific volume when the temperature rises is significantly lower than, for example when using water.
  • the application of the medium in the direction of flow of the exhaust gases inside the feed nozzles and especially at the front Edge of the deposits has the advantage that the medium, preferably Water, deposits reached inside the Feed nozzle or the feed pipe and the still have a rough and porous surface because they are against the heat radiation from the combustion chamber through the feed nozzle or the feed pipe is better protected as deposits on the outside of the feed nozzle or of the feed pipe, where due to the strong heat glazing of these deposits occurs.
  • the medium can therefore start at a point where it is still easy to get into the deposits can penetrate with the explained Explosives begin, which then move towards the Mouth of the feed nozzle or the feed pipe to to the outside of the feed nozzle or the feed pipe continues.
  • the droplets By supplying the liquid medium by means of a supply nozzle in droplet form, the droplets being so have a small size so that the medium is sprayed on, becomes a uniform wetting of the surface of the deposits achieved with relatively low media consumption. Excess medium will escape from the Feed nozzles or the feed pipes largely avoided, so that an impairment of the combustion in There is no combustion chamber due to excessively large quantities of medium escaping. It is particularly advantageous if the liquid medium in fine distribution as a droplet mist on the deposits is applied.
  • the medium is concentric with the feed nozzle or is fed to the feed pipe.
  • the cone angle of the medium veil can range from 10 ° to Be adjustable by 180 °.
  • the medium pressure in particular the water pressure is the pressure of a public water supply network corresponds and is preferably 6 bar. It is beneficial when both the pressure and the amount as well the feeding time and the duration between two medium feeding phases are adjustable.
  • a device for carrying out the method is identified by a lance with a medium connection, into the interior of a feed nozzle or tube for recirculated exhaust gas from a combustion system can be used, the lance at its front free end carries a nozzle head.
  • the application of the invention requires in most cases no special additional effort, since existing ones Systems in the rear area of the feed nozzles or feed pipes lying in the axial direction of the same Have stubs for importing rods to help with these rods to remove the deposits. About these The lances can cut into the interior of the feed nozzles or feed lines are introduced. Training a nozzle head at the free end of the lance makes it possible Apply medium finely distributed on the deposits. Here it is again advantageous if the spray angle of the nozzle head is adjustable to adapt the trained Make medium veils to the present circumstances to be able to.
  • the lance inside the feed nozzle or the feed pipe in is kept displaceable in the longitudinal direction, so is an adjustment of the medium outlet to the respective places where there are deposits.
  • the medium emerging from the nozzle head of the advancing Track cleaning effect within the feed nozzle is possible.
  • a controllable valve device for Opening and shutting off the medium supply to regulate the Medium pressure and the amount of medium and to regulate the Opening times and the intervals between two opening phases is connected to a control device.
  • FIG. 1 shows a furnace with a feed hopper 1 with subsequent chute 2 for the task of Firing goods on a feed table 3, on the loading piston 4 are provided to the coming from the feed chute Put the firing material on a grate 5.
  • a total designated 6 device provided for the supply of primary combustion air.
  • exhaust gas is re-introduced sucked into the firebox.
  • a suction opening 12 is provided, from which a suction line 13 extends into which a fan 14 is used.
  • a line 15 connected to the amount of exhaust gas extracted feeds a ring line 16 from the so-called secondary air nozzles 17 are fed via which the exhaust gas extracted is returned to the combustion chamber 7.
  • FIGS. 2 and 3 there is 18 in the wall the combustion chamber 7 within a niche 19 of the same Feed nozzle or a feed tube 20 is used, wherein the feed nozzle 20 via a flange connection 21 connected to a total of 22 designated manifold is.
  • the manifold has an aligned one hand the feed nozzle 20 aligned tube 23 and another Tube 24 on that with the ring line 16 for the returned Exhaust gas is connected.
  • a closure cover 25 is provided, in the center of a holding device 26 for a Lance 27 is provided.
  • the holding device 26 is in the Able to receive the lance 27 displaceably in its longitudinal direction.
  • a nozzle head 28 intended.
  • a valve device 29 is arranged at the rear end of the lance 27, to which a water supply line in the form of a Hose 30 is flanged.
  • the valve device 29 stands via a line 31 to a control device 32 in connection, which is able to supply water to the lance 27 regulate in terms of pressure and quantity and also shut off and open the valve device 29, whereby also the time intervals between the opening phases and the Length of the opening phases set by the control device 32 can be.
  • the nozzle head 28 provided at the front end of the lance 27 allows water to be sprayed out in the form of a conical Water curtain, the cone angle is adjustable.
  • This water curtain is in figure with dash-dotted lines 3 indicated and provided with the reference number 33.
  • dashed lines Lines 34 depict deposits that are both inside the feed nozzle as well as on the outside thereof occur when exhaust gas from the supply nozzle 20 is blown into the combustion chamber 7. The length of time in which Such deposits form depends on the composition of the exhaust gas and also depending on whether only exhaust gas or exhaust gas mixed with ambient air via the feed nozzles 20 is introduced into the combustion chamber 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Incineration Of Waste (AREA)
  • Cleaning In General (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Air Supply (AREA)
  • Processing Of Solid Wastes (AREA)
  • Physical Vapour Deposition (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP98105977A 1997-04-24 1998-04-01 Procédé et dispositif pour enlever les dépots dans des buses ou des tubes d'amenée dans les installations de combustion Expired - Lifetime EP0874196B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19717378A DE19717378A1 (de) 1997-04-24 1997-04-24 Verfahren und Vorrichtung zum Entfernen von Ablagerungen in und an Zuführungsdüsen oder Zuführungsrohren von Feuerungsanlagen
DE19717378 1997-04-24

Publications (3)

Publication Number Publication Date
EP0874196A2 true EP0874196A2 (fr) 1998-10-28
EP0874196A3 EP0874196A3 (fr) 1999-11-03
EP0874196B1 EP0874196B1 (fr) 2002-10-23

Family

ID=7827652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105977A Expired - Lifetime EP0874196B1 (fr) 1997-04-24 1998-04-01 Procédé et dispositif pour enlever les dépots dans des buses ou des tubes d'amenée dans les installations de combustion

Country Status (17)

Country Link
US (1) US6105590A (fr)
EP (1) EP0874196B1 (fr)
JP (1) JP2868761B2 (fr)
AT (1) ATE226706T1 (fr)
BR (1) BR9801429A (fr)
CA (1) CA2234804C (fr)
CZ (1) CZ288190B6 (fr)
DE (2) DE19717378A1 (fr)
DK (1) DK0874196T3 (fr)
ES (1) ES2184159T3 (fr)
NO (1) NO312982B1 (fr)
PL (1) PL191420B1 (fr)
PT (1) PT874196E (fr)
RU (1) RU2143087C1 (fr)
SG (1) SG75832A1 (fr)
TW (1) TW346533B (fr)
UA (1) UA41463C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086206A1 (fr) * 2000-05-08 2001-11-15 Erik Riedel Procede pour eliminer les depots dans des chambres de combustion d'installations thermiques pendant le fonctionnement courant
EP2447607A1 (fr) * 2010-10-28 2012-05-02 Wgm-Waste Gasification & Melting Sa Appareil pour détacher des depots solides à l'interieur de fours de combustion ou gasification
CN104595882A (zh) * 2015-01-19 2015-05-06 浙江徐氏厨房设备有限公司 燃气蒸汽发生器除垢装置

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
RU2190699C2 (ru) * 2000-12-04 2002-10-10 Акционерное общество открытого типа "Всероссийский теплотехнический научно-исследовательский институт" Способ кислородной пассивации и очистки стальных труб
DE102004060884A1 (de) * 2004-12-17 2006-06-29 Clyde Bergemann Gmbh Verfahren und Vorrichtung zum Entfernen von Verbrennungsrückständen mit unterschiedlichen Reinigungsmedien
US8381690B2 (en) * 2007-12-17 2013-02-26 International Paper Company Controlling cooling flow in a sootblower based on lance tube temperature
JP5352096B2 (ja) * 2008-02-29 2013-11-27 三菱重工環境・化学エンジニアリング株式会社 燃焼炉及び堆積物除去機構
JP5535506B2 (ja) * 2009-03-23 2014-07-02 三菱重工環境・化学エンジニアリング株式会社 ストーカ式焼却炉のノズル清掃装置
CN101876447B (zh) * 2010-07-01 2012-10-10 中国石油化工股份有限公司 一种吹灰器
GB201312870D0 (en) * 2013-07-18 2013-09-04 Charlton & Jenrick Ltd Fire constructions
US9541282B2 (en) 2014-03-10 2017-01-10 International Paper Company Boiler system controlling fuel to a furnace based on temperature of a structure in a superheater section
US9927231B2 (en) * 2014-07-25 2018-03-27 Integrated Test & Measurement (ITM), LLC System and methods for detecting, monitoring, and removing deposits on boiler heat exchanger surfaces using vibrational analysis
CA2955299C (fr) 2014-07-25 2017-12-12 International Paper Company Systeme et procede pour la determination de localisation d'encrassement sur une surface de transfert de chaleur de chaudiere
CN105750256A (zh) * 2016-05-14 2016-07-13 淮安美妙电子科技有限公司 一种可预排气的高压清洗机
US20210341140A1 (en) 2020-05-01 2021-11-04 International Paper Company System and methods for controlling operation of a recovery boiler to reduce fouling

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DE741701C (de) 1938-08-30 1943-11-15 Rheinmetall Borsig Ag Brennkammer mit Luftzufuehrungsoeffnungen, insbesondere fuer Kohlenstaubfeuerungen

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001086206A1 (fr) * 2000-05-08 2001-11-15 Erik Riedel Procede pour eliminer les depots dans des chambres de combustion d'installations thermiques pendant le fonctionnement courant
EP2447607A1 (fr) * 2010-10-28 2012-05-02 Wgm-Waste Gasification & Melting Sa Appareil pour détacher des depots solides à l'interieur de fours de combustion ou gasification
CN104595882A (zh) * 2015-01-19 2015-05-06 浙江徐氏厨房设备有限公司 燃气蒸汽发生器除垢装置
CN104595882B (zh) * 2015-01-19 2016-06-08 浙江徐氏厨房设备有限公司 燃气蒸汽发生器除垢装置

Also Published As

Publication number Publication date
PL191420B1 (pl) 2006-05-31
NO981805L (no) 1998-10-26
RU2143087C1 (ru) 1999-12-20
US6105590A (en) 2000-08-22
CZ124898A3 (cs) 1999-02-17
PL325947A1 (en) 1998-10-26
SG75832A1 (en) 2000-10-24
BR9801429A (pt) 1999-03-30
JPH10306913A (ja) 1998-11-17
ES2184159T3 (es) 2003-04-01
CA2234804A1 (fr) 1998-10-24
CA2234804C (fr) 2004-06-08
TW346533B (en) 1998-12-01
ATE226706T1 (de) 2002-11-15
EP0874196B1 (fr) 2002-10-23
DE19717378A1 (de) 1998-10-29
DK0874196T3 (da) 2003-02-17
UA41463C2 (uk) 2001-09-17
CZ288190B6 (en) 2001-05-16
NO981805D0 (no) 1998-04-22
PT874196E (pt) 2003-03-31
EP0874196A3 (fr) 1999-11-03
JP2868761B2 (ja) 1999-03-10
NO312982B1 (no) 2002-07-22
DE59806011D1 (de) 2002-11-28

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