US20130269576A1 - Burner with adjustable flue gas recirculation - Google Patents

Burner with adjustable flue gas recirculation Download PDF

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Publication number
US20130269576A1
US20130269576A1 US13/885,404 US201113885404A US2013269576A1 US 20130269576 A1 US20130269576 A1 US 20130269576A1 US 201113885404 A US201113885404 A US 201113885404A US 2013269576 A1 US2013269576 A1 US 2013269576A1
Authority
US
United States
Prior art keywords
burner
feed duct
throttle apparatus
flue gas
combustion chamber
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.)
Abandoned
Application number
US13/885,404
Other languages
English (en)
Inventor
Robert Stegemann
Christopher Eberstein
Michael Nold
Christian Geipel
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.)
Linde GmbH
Original Assignee
Linde 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 Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EBERSTEIN, CHRISTOPHER, GEIPEL, CHRISTIAN, NOLD, MICHAEL, STEGEMANN, ROBERT
Publication of US20130269576A1 publication Critical patent/US20130269576A1/en
Abandoned 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/08—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for reducing temperature in combustion chamber, e.g. for protecting walls of combustion chamber
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/20—Premixing fluegas with 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/50—Control of recirculation rate

Definitions

  • the invention relates to a burner for firing a combustion chamber, with a feed duct for feeding fuel gas or combustion air into the combustion chamber, wherein the burner comprises an inlet opening via which flue gas may flow into the feed duct.
  • a burner of the above type is known, for example, from patent DE10337526. Said burner makes it possible to lower the maximum combustion temperatures through the recirculation of flue gases and thereby to reduce thermal nitrogen oxide formation.
  • the burner which is arranged at the bottom of the combustion chamber of a combustion furnace, comprises a first feed duct for feeding fuel gas into the combustion chamber, with an inlet opening for flue gas which opens towards the combustion chamber. The flue gas is sucked in by the pressurized fuel gas flowing into the first feed duct and mixes with the fuel gas. Combustion air can be introduced into the combustion chamber via a second feed duct. The outlet openings of the two feed ducts are arranged adjacent one another, such that the combustion air mixes with the fuel gas and the flue gas outside the burner.
  • Flue gas intake by the burner has an effect on the shape of the developing flame, which may for example be compressed or otherwise deformed, such that the reaction zone is concentrated onto a smaller spatial region and the maximum combustion temperature increases. This effect neutralizes, or at least lessens, the nitrogen oxide formation-reducing effect of the flue gas recirculation. Furthermore, a deformed flame may come too close to internals, such as reformer or cracking tubes, arranged in the combustion chamber and damage them.
  • the object of the present invention is accordingly to modify a burner of the above type in such a way as to overcome the outlined disadvantages of the prior art.
  • the burner comprises an adjustable throttle apparatus, by means of which the mass flow rate of the flue gas flowing into the feed duct is adjustable.
  • the throttle apparatus is preferably constructed such that it is operable from outside the combustion chamber when the burner is in the installed state. With its assistance, the magnitude of the mass flow rate of the flue gas flowing into the feed duct may be varied at any time, but in particular during burner operation.
  • the burner according to the invention may be used to fire steam reformers and crackers, and also other process furnaces. Such apparatuses are operated in a steady state over relatively long periods. This means that the burner settings remain unchanged after ignition thereof and any heating phase which may follow thereafter. Since under such operating conditions the position of the throttle apparatus only occasionally needs to be changed, it makes sense for an apparatus to be provided which enables manual adjustment of the position thereof.
  • the throttle apparatus is connected to an adjusting drive, by means of which it is adjustable with the assistance of a motor.
  • This variant for example allows the position of the throttle apparatus to be changed by remote control from a control desk.
  • the throttle apparatus may furthermore be incorporated into a control loop, with which the rate of nitrogen oxide formation in the combustion chamber may be kept constantly at a predetermined value even when operating conditions vary over time.
  • the inlet opening and/or the throttle apparatus are constructed with a shape by means of which, when the burner is in operation, an at least linear relationship arises between the position of the throttle apparatus and the variation of the mass flow rate of the flue gas flowing into the feed duct.
  • the throttle apparatus usually comes into contact with aggressive gases, the temperatures of which may be far greater than 1000° C. To ensure its functionality even over relatively long periods, it is necessary to construct the throttle apparatus with materials which are largely insensitive to the hot combustion chamber atmosphere.
  • the throttle apparatus therefore conveniently consists wholly or partially of refractory material and/or ceramic fibers and/or a high temperature metal.
  • the throttle apparatus comprises a disk arranged so as to be movable lengthwise in the feed duct, the cross sectional shape of which disk largely corresponds to the shape of the clear cross section of the feed duct and which narrows the inlet opening to a greater or lesser extent depending on its position.
  • the throttle apparatus comprises a rotary slide valve mounted rotatably about the longitudinal axis of the feed duct, rotation of which may narrow the inlet opening to a greater or lesser extent.
  • the feed duct preferably comprises a duct for feeding fuel gas into the combustion chamber.
  • This variant allows the feed duct to be compactly constructed, since the relatively significant momentum of the inflowing fuel gas may be used to suck flue gas in effectively.
  • FIG. 1 shows a longitudinal section through a preferred variant of the burner according to the invention.
  • the burner B which is arranged at the bottom A of a combustion chamber, comprises a first feed duct Z 1 for supplying combustion fuel 1 and a second feed duct Z 2 , via which combustion air 2 may be fed into a combustion chamber.
  • a gas feed tube R is arranged in the first feed duct Z 1 , which is connected with a fuel gas source under overpressure (not shown) and by means of which fuel gas 3 is expandable into the first feed duct Z 1 .
  • a hole C is provided in the side wall of the first feed duct Z 1 , which hole opens towards the combustion chamber and through which flue gas 4 may flow in from the combustion chamber, to form a gas mixture 5 with the combustion gas 3 .
  • a throttle apparatus D is arranged, which comprises a disk P and a rod S connected firmly therewith.
  • the disk P the cross section of which corresponds largely to the cross section of the first feed duct Z 1 , is vertically mobile.
  • the rod S is mounted in a mobile manner in the bottom of the burner B and passed outwards therethrough. This makes it possible to manipulate the rod S from outside the burner B, in order thereby to change the vertical position of the disk P in the first feed duct Z 1 .
  • the cross section of the inlet opening E, and thus also the flow resistance for the flue gas 4 flowing into the first feed duct Z 1 varies depending on the position of the disk P, such that it is possible to adjust the mass flow rate of the flue gas 4 with the assistance of the throttle member D.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
US13/885,404 2010-11-18 2011-11-03 Burner with adjustable flue gas recirculation Abandoned US20130269576A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010051806A DE102010051806A1 (de) 2010-11-18 2010-11-18 Brenner mit einstellbarer Rauchgasrezirkulation
DE102010051806.9 2010-11-18
PCT/EP2011/005541 WO2012065691A2 (fr) 2010-11-18 2011-11-03 Brûleur à recirculation de gaz de fumées réglable

Publications (1)

Publication Number Publication Date
US20130269576A1 true US20130269576A1 (en) 2013-10-17

Family

ID=44925482

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/885,404 Abandoned US20130269576A1 (en) 2010-11-18 2011-11-03 Burner with adjustable flue gas recirculation

Country Status (5)

Country Link
US (1) US20130269576A1 (fr)
CA (1) CA2816176A1 (fr)
DE (1) DE102010051806A1 (fr)
RU (1) RU2013127511A (fr)
WO (1) WO2012065691A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150111159A1 (en) * 2012-06-05 2015-04-23 Loesche Gmbh Method for operating a multi-gas burner and a multi-gas burner
CN111911917A (zh) * 2020-07-15 2020-11-10 江苏迈阳环保有限公司 一种燃烧器用烟气循环装置

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532740A (en) * 1948-02-10 1950-12-05 William H Speer Fuel burner provided with combustion gas recirculating means
US2648599A (en) * 1949-03-22 1953-08-11 Petro Chem Process Company Inc Heat control in vertical furnace by flue gas recirculation
US3161228A (en) * 1961-05-17 1964-12-15 Brodlin Willi Method of gasifying liquid fuels
US3402654A (en) * 1966-05-04 1968-09-24 American Air Filter Co Ventilation control
US3685740A (en) * 1969-10-29 1972-08-22 Air Reduction Rocket burner with flame pattern control
US3984196A (en) * 1974-05-28 1976-10-05 Kurt Zenkner Method and burner for combustion of waste air
US4551089A (en) * 1984-07-30 1985-11-05 Dowa Company, Ltd. Evaporation burner
US4728282A (en) * 1984-09-12 1988-03-01 Air, Ltd. Method and apparatus for conducting a substantially isothermal combustion process in a combustor
US4926765A (en) * 1986-12-11 1990-05-22 Walter Dreizler Furnace blower with external gas recycling for the reduction of NOx
US4995807A (en) * 1989-03-20 1991-02-26 Bryan Steam Corporation Flue gas recirculation system
US5044932A (en) * 1989-10-19 1991-09-03 It-Mcgill Pollution Control Systems, Inc. Nitrogen oxide control using internally recirculated flue gas
US5073105A (en) * 1991-05-01 1991-12-17 Callidus Technologies Inc. Low NOx burner assemblies
US5135387A (en) * 1989-10-19 1992-08-04 It-Mcgill Environmental Systems, Inc. Nitrogen oxide control using internally recirculated flue gas
US5284438A (en) * 1992-01-07 1994-02-08 Koch Engineering Company, Inc. Multiple purpose burner process and apparatus
US5370526A (en) * 1992-03-21 1994-12-06 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V. Burner poor in nitrogen oxide
US5542840A (en) * 1994-01-26 1996-08-06 Zeeco Inc. Burner for combusting gas and/or liquid fuel with low NOx production
US5882184A (en) * 1996-08-05 1999-03-16 The Boc Group Plc Low emission swirl burner
US5944507A (en) * 1997-05-07 1999-08-31 The Boc Group Plc Oxy/oil swirl burner
US6044827A (en) * 1997-06-18 2000-04-04 Daimlerchrysler Ag Exhaust gas recirculation arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868211A (en) * 1974-01-11 1975-02-25 Aqua Chem Inc Pollutant reduction with selective gas stack recirculation
DE3666625D1 (en) * 1985-02-21 1989-11-30 Tauranca Ltd Fluid fuel fired burner
AT396821B (de) * 1990-03-21 1993-12-27 Vaillant Gmbh Öl- oder gas-gebläsebrenner
GB2394275B (en) 2002-08-14 2005-09-21 Hamworthy Combustion Eng Ltd Burner and method of burning gas in a furnace
US7104787B2 (en) * 2004-05-06 2006-09-12 Eclipse, Inc. Apparatus for radiant tube exhaust gas entrainment
DE202009002700U1 (de) * 2009-03-05 2009-04-30 Meku Metallverarbeitungs Gmbh & Co. Kg Mischeinrichtung für einen Brenner

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532740A (en) * 1948-02-10 1950-12-05 William H Speer Fuel burner provided with combustion gas recirculating means
US2648599A (en) * 1949-03-22 1953-08-11 Petro Chem Process Company Inc Heat control in vertical furnace by flue gas recirculation
US3161228A (en) * 1961-05-17 1964-12-15 Brodlin Willi Method of gasifying liquid fuels
US3402654A (en) * 1966-05-04 1968-09-24 American Air Filter Co Ventilation control
US3685740A (en) * 1969-10-29 1972-08-22 Air Reduction Rocket burner with flame pattern control
US3984196A (en) * 1974-05-28 1976-10-05 Kurt Zenkner Method and burner for combustion of waste air
US4551089A (en) * 1984-07-30 1985-11-05 Dowa Company, Ltd. Evaporation burner
US4728282A (en) * 1984-09-12 1988-03-01 Air, Ltd. Method and apparatus for conducting a substantially isothermal combustion process in a combustor
US4926765A (en) * 1986-12-11 1990-05-22 Walter Dreizler Furnace blower with external gas recycling for the reduction of NOx
US4995807A (en) * 1989-03-20 1991-02-26 Bryan Steam Corporation Flue gas recirculation system
US5044932A (en) * 1989-10-19 1991-09-03 It-Mcgill Pollution Control Systems, Inc. Nitrogen oxide control using internally recirculated flue gas
US5135387A (en) * 1989-10-19 1992-08-04 It-Mcgill Environmental Systems, Inc. Nitrogen oxide control using internally recirculated flue gas
US5073105A (en) * 1991-05-01 1991-12-17 Callidus Technologies Inc. Low NOx burner assemblies
US5284438A (en) * 1992-01-07 1994-02-08 Koch Engineering Company, Inc. Multiple purpose burner process and apparatus
US5370526A (en) * 1992-03-21 1994-12-06 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V. Burner poor in nitrogen oxide
US5542840A (en) * 1994-01-26 1996-08-06 Zeeco Inc. Burner for combusting gas and/or liquid fuel with low NOx production
US5882184A (en) * 1996-08-05 1999-03-16 The Boc Group Plc Low emission swirl burner
US5944507A (en) * 1997-05-07 1999-08-31 The Boc Group Plc Oxy/oil swirl burner
US6044827A (en) * 1997-06-18 2000-04-04 Daimlerchrysler Ag Exhaust gas recirculation arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150111159A1 (en) * 2012-06-05 2015-04-23 Loesche Gmbh Method for operating a multi-gas burner and a multi-gas burner
CN111911917A (zh) * 2020-07-15 2020-11-10 江苏迈阳环保有限公司 一种燃烧器用烟气循环装置

Also Published As

Publication number Publication date
RU2013127511A (ru) 2014-12-27
CA2816176A1 (fr) 2012-05-24
DE102010051806A1 (de) 2012-05-24
WO2012065691A2 (fr) 2012-05-24
WO2012065691A3 (fr) 2013-08-08

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Date Code Title Description
AS Assignment

Owner name: LINDE AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:STEGEMANN, ROBERT;EBERSTEIN, CHRISTOPHER;NOLD, MICHAEL;AND OTHERS;REEL/FRAME:030556/0452

Effective date: 20130605

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION