EP0182063A2 - Procédé de réduction de la teneur en oxydes d'azote dans les gaz de combustion - Google Patents

Procédé de réduction de la teneur en oxydes d'azote dans les gaz de combustion Download PDF

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Publication number
EP0182063A2
EP0182063A2 EP85112718A EP85112718A EP0182063A2 EP 0182063 A2 EP0182063 A2 EP 0182063A2 EP 85112718 A EP85112718 A EP 85112718A EP 85112718 A EP85112718 A EP 85112718A EP 0182063 A2 EP0182063 A2 EP 0182063A2
Authority
EP
European Patent Office
Prior art keywords
carrier
fuel
secondary fuel
combustion
reduction
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.)
Withdrawn
Application number
EP85112718A
Other languages
German (de)
English (en)
Other versions
EP0182063A3 (fr
Inventor
Helmut Martin
Wolfgang Dipl.-Ing. Schreier
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.)
Hitachi Zosen Inova Steinmueller GmbH
Original Assignee
L&C Steinmueller 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 L&C Steinmueller GmbH filed Critical L&C Steinmueller GmbH
Publication of EP0182063A2 publication Critical patent/EP0182063A2/fr
Publication of EP0182063A3 publication Critical patent/EP0182063A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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 
    • F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air

Definitions

  • the invention relates to a method for reducing the NO x content in combustion gases by introducing secondary fuel.
  • the object of the invention is therefore to create a method in which the NO content in X of the combustion gases of large-scale combustion plants, in particular steam generators, is effectively reduced.
  • the method according to the invention is particularly advantageous in its application to combustion processes which are based on dry firing or melting boiler firing.
  • both solid fuels, such as coal, and liquid fuels, such as oil, are suitable as secondary fuels.
  • a wide range of suitable liquids can be used as the liquid carrier medium for the secondary fuel.
  • non-flammable liquids in the simplest case water, can be used as well as flammable liquids, which are usually of organic origin.
  • flammable liquids which are usually of organic origin.
  • oil should be mentioned here, but other, lower-boiling organic liquids, such as alcohols (methanol), can also advantageously be used as carriers.
  • a well-suited mixture consists of coal dust as a secondary fuel and water as a carrier medium.
  • the ratio of secondary fuel to carrier medium can vary within wide limits.
  • the lower limit for the proportion of the carrier medium is limited by the atomization ability of the suspension of fuel and carrier.
  • the upper limit of the carrier medium is determined by the economy and the required degree of nitrogen oxide reduction.
  • the proportion of the carrier, based on the carrier and fuel is 20 to 80% by weight.
  • Fuel and carrier are fed to the combustion chamber in finely divided form, usually through nozzles. No special nozzles are required for blowing into the firebox. Rather, a sufficiently good fuel distribution and atomization quality can be achieved with known nozzle designs.
  • nozzle constructions known for atomizing liquid are suitable, e.g. the Y atomizer.
  • the secondary fuel can be atomized using various methods known per se. Pressure is just as suitable for this as the use of an external medium such as air, steam or gas.
  • the method according to the invention enables a sufficient penetration depth of the secondary fuel and thorough mixing, with the distribution and regulation of the fuel injection being additionally simplified.
  • the direction and amount of the injection can also be controlled independently of the respective boiler load. Individual nozzles can also be switched on or off without any effect on other nozzles.
  • the boiler (1) is supplied with fuel and air for primary combustion through the lines (2). To complete the combustion, combustion air is fed in at (3) behind the primary combustion zone. Secondary fuel becomes between the fuel / air supply for the primary combustion (2) and the supply for the secondary air (3) injected into the combustion chamber via a line (4) in a liquid carrier via nozzles (not shown), a control element (5) being provided for controlling the flow rate. The secondary fuel is supplied or returned in line (6).
  • the fuel for primary combustion can be solid, liquid or gaseous, the secondary fuel is always a suspension of either a solid or a liquid fuel in a liquid carrier medium and is therefore always liquid.
  • Figure 3 illustrates the general design of a Y atomizer that is suitable for atomizing the suspension.
  • This atomizer can be used with different atomization angles to evenly distribute the secondary fuel in the combustion chamber.
  • the atomizing medium is transported through the centrally arranged pipe and the secondary fuel / carrier mixture is transported through the jacket pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP85112718A 1984-11-15 1985-10-08 Procédé de réduction de la teneur en oxydes d'azote dans les gaz de combustion Withdrawn EP0182063A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843441675 DE3441675A1 (de) 1984-11-15 1984-11-15 Verfahren zur verringerung des no(pfeil abwaerts)x(pfeil abwaerts)-gehalts in verbrennungsgasen
DE3441675 1984-11-15

Publications (2)

Publication Number Publication Date
EP0182063A2 true EP0182063A2 (fr) 1986-05-28
EP0182063A3 EP0182063A3 (fr) 1988-03-02

Family

ID=6250320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112718A Withdrawn EP0182063A3 (fr) 1984-11-15 1985-10-08 Procédé de réduction de la teneur en oxydes d'azote dans les gaz de combustion

Country Status (4)

Country Link
US (1) US4669399A (fr)
EP (1) EP0182063A3 (fr)
JP (1) JPS61122405A (fr)
DE (1) DE3441675A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993022600A1 (fr) * 1992-04-30 1993-11-11 Abb Carbon Ab Procede permettant de maintenir une temperature de travail nominale dans les gaz de combustion d'une centrale electrique a lit fluidise sous pression
EP0565196A3 (en) * 1992-04-09 1993-12-08 Shell Int Research Premixed/high-velocity fuel jet low no x burner
EP0575540A4 (fr) * 1991-03-14 1994-04-13 James M. Valentine
EP0809067A1 (fr) * 1996-05-21 1997-11-26 Gaz De France Procédé de réduction, par recombustion des oxydes d'azote contenus dans les fumées issues d'une combustion primaire réalisée dans un four, et installation pour sa mise en oeuvre.

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621347A1 (de) * 1986-06-26 1988-01-14 Henkel Kgaa Verfahren und anlage zur verminderung des no(pfeil abwaerts)x(pfeil abwaerts)-gehaltes im rauchgas bei kohlenstaubbefeuerten dampferzeugern mit trockenentaschung
US4891339A (en) * 1987-10-23 1990-01-02 Aerochem Research Laboratories, Inc. Process and apparatus for the flame preparation of ceramic powders
US4989549A (en) * 1988-10-11 1991-02-05 Donlee Technologies, Inc. Ultra-low NOx combustion apparatus
US5042404A (en) * 1990-09-04 1991-08-27 Consolidated Natural Gas Service Company, Inc. Method of retaining sulfur in ash during coal combustion
US5634329A (en) * 1992-04-30 1997-06-03 Abb Carbon Ab Method of maintaining a nominal working temperature of flue gases in a PFBC power plant
AT399297B (de) * 1993-12-28 1995-04-25 Staudinger Gernot Verfahren zum zerstören von stickoxiden in rauchgasen von feuerungsanlagen
GB2292452B (en) * 1994-07-26 1998-03-25 Airoil Flaregas Ltd A flare tip structure and a method of disposal of waste gas utilising such a structure
CZ2003318A3 (en) * 2000-07-05 2004-03-17 Software & Technologie Glas Gmbh Cottbus Nitrogen oxide reduced introduction of fuel in combustion air ports of a glass furnace
US6652265B2 (en) 2000-12-06 2003-11-25 North American Manufacturing Company Burner apparatus and method
US6929469B2 (en) * 2002-02-28 2005-08-16 North American Manufacturing Company Burner apparatus
US7135027B2 (en) * 2002-10-04 2006-11-14 Baxter International, Inc. Devices and methods for mixing and extruding medically useful compositions
US8215949B2 (en) * 2006-05-17 2012-07-10 Majed Toqan Combustion stabilization systems
US9353944B1 (en) 2009-09-03 2016-05-31 Poet Research, Inc. Combustion of high solids liquid
US9541280B2 (en) 2014-06-04 2017-01-10 Fives North American Combustion, Inc. Ultra low NOx combustion for steam generator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US411555A (en) * 1889-09-24 Cyrus
US3611954A (en) * 1970-05-08 1971-10-12 Du Pont Oxidative waste disposal
US3738289A (en) * 1971-08-16 1973-06-12 Chicago Bridge & Iron Co Counter-flow sludge burner
US3867507A (en) * 1972-04-24 1975-02-18 Exxon Research Engineering Co Method for removing the oxides of nitrogen as air contaminants
JPS5318466A (en) * 1976-08-05 1978-02-20 Mitsubishi Heavy Ind Ltd Charging method for oxygen-containing hydrocarbons and/or their precursors into exhaust gas
US4496306A (en) * 1978-06-09 1985-01-29 Hitachi Shipbuilding & Engineering Co., Ltd. Multi-stage combustion method for inhibiting formation of nitrogen oxides
JPS5623615A (en) * 1979-08-06 1981-03-06 Babcock Hitachi Kk Burning method for low nox

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0575540A4 (fr) * 1991-03-14 1994-04-13 James M. Valentine
EP0565196A3 (en) * 1992-04-09 1993-12-08 Shell Int Research Premixed/high-velocity fuel jet low no x burner
WO1993022600A1 (fr) * 1992-04-30 1993-11-11 Abb Carbon Ab Procede permettant de maintenir une temperature de travail nominale dans les gaz de combustion d'une centrale electrique a lit fluidise sous pression
EP0809067A1 (fr) * 1996-05-21 1997-11-26 Gaz De France Procédé de réduction, par recombustion des oxydes d'azote contenus dans les fumées issues d'une combustion primaire réalisée dans un four, et installation pour sa mise en oeuvre.
FR2749066A1 (fr) * 1996-05-21 1997-11-28 Gaz De France Procede de reduction, par recombustion, des oxydes d'azote contenus dans les fumees issues d'une combustion primaire realisee dans un four, et installation pour sa mise en oeuvre

Also Published As

Publication number Publication date
US4669399A (en) 1987-06-02
JPS61122405A (ja) 1986-06-10
EP0182063A3 (fr) 1988-03-02
DE3441675A1 (de) 1986-05-22
DE3441675C2 (fr) 1989-02-02

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