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EP0756134A1 - Procédé et brûleur pour la réduction de la production de NOx de la combustion de poussière de charbon - Google Patents

Procédé et brûleur pour la réduction de la production de NOx de la combustion de poussière de charbon Download PDF

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Publication number
EP0756134A1
EP0756134A1 EP96106401A EP96106401A EP0756134A1 EP 0756134 A1 EP0756134 A1 EP 0756134A1 EP 96106401 A EP96106401 A EP 96106401A EP 96106401 A EP96106401 A EP 96106401A EP 0756134 A1 EP0756134 A1 EP 0756134A1
Authority
EP
European Patent Office
Prior art keywords
primary
dust
air
pipe
tube
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
EP96106401A
Other languages
German (de)
English (en)
Other versions
EP0756134B1 (fr
Inventor
Alfons Leise
Michael Streffing
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 Power Europe GmbH
Original Assignee
Babcock Lentjes Kraftwerkstechnik 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 Babcock Lentjes Kraftwerkstechnik GmbH filed Critical Babcock Lentjes Kraftwerkstechnik GmbH
Publication of EP0756134A1 publication Critical patent/EP0756134A1/fr
Application granted granted Critical
Publication of EP0756134B1 publication Critical patent/EP0756134B1/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
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • F23D17/005—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or pulverulent fuel
    • 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
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
    • 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
    • F23C2201/20—Burner staging
    • 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
    • F23C2202/10—Premixing fluegas with fuel and combustion air
    • 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 a method for reducing the formation of NO x in the combustion of coal dust with combustion air in burners with the features of the preamble of claim 1 and a burner with the features of the preamble of claim 5.
  • a coal dust burner with a stepped air supply is known from DE-OS 42 17 879.
  • the air flows are fed through spiral inlet housings and flow through concentric ring channels in which a swirl is forced on them.
  • the secondary and the tertiary air flow are led away to the outside of the fuel flow via deflection fillets, which is discharged through an annular duct, which is arranged between the core air pipe and the secondary air duct and is not divided. This creates an internal combustion zone with a low air ratio and a more stable, oxygen-rich flame envelope from which the fuel-rich flame is supplied with oxygen with a delay.
  • the invention has for its object to influence the formation of NO x in the ignition phase of the coal dust.
  • the invention is based on the idea that the combustion of coal dust in steam generator systems, the formation of NO x is mainly influenced by the air ratio in the combustion chamber of the steam generator system, by the combustion temperature, by the fuel quality and above all by the oxygen quotient ⁇ , which at the time of Primary reactions, i.e. during the pyrolysis and the parallel oxidation of the volatile constituents of the coal.
  • Oxygen quotient ⁇ is understood to mean the ratio that is formed from the oxygen available in the ignition phase and the need for oxygen for the combustion of the outgassing volatile constituents.
  • the percentage of volatile constituents released ⁇ volatile constituents which outgas from the coal is low (FIG. 1).
  • the averaged oxygen quotient ⁇ can be calculated for all burner designs.
  • the measures according to the invention can influence the maximum level and the average value of the oxygen quotient ⁇ in such a way that a minimum of NO x is produced without the processes necessary for maintaining the primary reactions at the burner outlet coming to a standstill.
  • the burner shown contains an oil burner ignition lance 2 which is provided in the burner longitudinal axis 1 and which is arranged within a core air tube 3.
  • the core air tube 3 is surrounded by a primary dust tube 6 to form a cylindrical annular channel.
  • a flow body 4 and in front of it a swirl body 5 are arranged on the core air tube 3 within the primary dust tube 6.
  • the primary dust tube 6 is connected at the rear end via a bend to a dust line 7, which leads to a mill, not shown.
  • a mixture is created via the dust line 7 from primary air and coal dust fed into the primary dust tube 6.
  • a stabilizing ring 8 At the outlet end of the primary dust tube 6 internals in the form of a stabilizing ring 8 are attached, which has a radially inward edge. This edge protrudes into the stream of primary air and coal dust.
  • the primary dust tube 6 is arranged concentrically in an annular channel which is formed by a primary gas tube 9.
  • This annular duct is surrounded by a secondary air tube 10 to form a further cylindrical annular duct, and this is in turn surrounded concentrically by a tertiary air tube 11 to form a cylindrical annular duct.
  • the primary dust tube 6, the primary gas tube 9 and the secondary air tube 10 have, at their outlet ends, conically widened sections which represent deflection fillets 12, 13, 14 for the medium flows which pass them outside.
  • the tertiary air tube 11 continues into the burner groove 15, which widens outwards.
  • the secondary air tube 10 and the tertiary air tube 11 of the burner are each connected at the rear end to a spiral inlet housing 16, 17 which are connected to inlet lines 20, 21 receiving control flaps 18, 19 and which connect the secondary air tube 10 with secondary air and the tertiary air tube 11 with tertiary air supply as partial flows of the combustion air.
  • the inlet housings 16, 17 ensure a uniform air distribution over the ring cross sections of the secondary air tube 10 and the tertiary air tube 11.
  • a device for influencing the swirl is arranged in the form of a cupboard made of rotatably mounted, axial swirl flaps 22, 23 in the secondary air pipe 10 and in the tertiary air pipe 11, which are adjustable from the outside via a linkage (not shown) with a drive.
  • These axial swirl flaps 22, 23 impose a swirl of adjustable size on the secondary air and the tertiary air.
  • these swirl flaps 22, 23 increase or decrease the swirl of the air flow caused by the inlet housing 16, 17. In special cases, the swirl can also be completely removed.
  • a swirl body 24 is arranged in the dust line 7 near the burner inlet and divides the mixture flow of primary air and coal dust into an outer, dust-rich and an inner, low-dust partial flow.
  • An immersion tube 25 is arranged in the dust line 7 downstream of the swirl body 24.
  • a line 26 is connected to the dip tube 25, which line leads out of the dust line 7 and is connected to the primary gas tube 9 via a radial inlet housing 31.
  • the burner shown in FIG. 5 largely corresponds to the burner according to FIG. 4.
  • a gas tube 27 is arranged around the core air tube 3, which forms an annular channel with the core air tube 3, which is blocked by a nozzle plate 28 at the outlet end.
  • gas outlet nozzles are arranged distributed over the circumference.
  • the gas pipe 27 is connected to a ring line 29 to which a feed line 30 is connected.
  • FIGS. 4 and 5 can also be combined with one another, as shown in FIG. 6.
  • the pyrolysis of the coal dust begins immediately after ignition. This creates a mixture in the primary ignition zone that contains the outgassed volatile constituents of the coal.
  • the method according to the invention aims to reduce the quotient ⁇ from the oxygen content in the primary gas and from the oxygen requirement for burning the volatile constituents present in the primary gas.
  • the mixture flow is divided into a dust-rich partial flow and a low-dust partial flow, and these partial flows are fed to the ignition area of the burner with different dust loads via separate channels.
  • the separation into two partial flows with different dust loading is preferably carried out in the dust line 7 directly on the burner. It is also possible to provide the separation at another point in the firing system.
  • the reduction in the proportion of oxygen in the primary gas can also be achieved by replacing part of the air in the primary air / coal dust mixture with flue gas.
  • This flue gas which can be warm or cooled, is mixed into the air before it enters the mill.
  • Another method for lowering the oxygen quotient ⁇ in the primary gas is that a flammable foreign gas is introduced into the primary gas via the gas pipe 27 described above. In this way, the share becomes more reactive volatile fuel products in the primary gas and thus the oxygen demand in the primary gas increases.
  • the amount of this foreign gas can be up to 20% of the burner output.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
EP96106401A 1995-07-25 1996-04-24 Procédé et brûleur pour la réduction de la production de NOx lors de la combustion de charbon pulvérisé Expired - Lifetime EP0756134B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527083A DE19527083A1 (de) 1995-07-25 1995-07-25 Verfahren und Brenner zur Verminderung der Bildung von NO¶x¶ bei der Verbrennung von Kohlenstaub
DE19527083 1998-07-25

Publications (2)

Publication Number Publication Date
EP0756134A1 true EP0756134A1 (fr) 1997-01-29
EP0756134B1 EP0756134B1 (fr) 2000-06-28

Family

ID=7767695

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106401A Expired - Lifetime EP0756134B1 (fr) 1995-07-25 1996-04-24 Procédé et brûleur pour la réduction de la production de NOx lors de la combustion de charbon pulvérisé

Country Status (13)

Country Link
US (2) US5832847A (fr)
EP (1) EP0756134B1 (fr)
JP (1) JPH0942611A (fr)
CN (1) CN1152686A (fr)
AU (1) AU727761B2 (fr)
CA (1) CA2175113A1 (fr)
DE (2) DE19527083A1 (fr)
DK (1) DK0756134T3 (fr)
ES (1) ES2149402T3 (fr)
PL (1) PL181172B1 (fr)
RU (1) RU2147708C1 (fr)
UA (1) UA45963C2 (fr)
ZA (1) ZA963667B (fr)

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FR2772887A1 (fr) * 1997-12-24 1999-06-25 Pillard Chauffage Bruleur a faible emission d'oxyde d'azote avec circuit de gaz recycle
EP1862737A2 (fr) * 2006-06-01 2007-12-05 The Babcock & Wilcox Company Cône de séparation d'air central à grand diamètre pour étendre la zone de recirculation interne
EP1998112A2 (fr) * 2007-05-29 2008-12-03 Hitachi Power Europe GmbH Brûleur destiné à la combustion d'un gas à faible capacité calorifique
EP2009351A3 (fr) * 2007-06-28 2009-11-04 Hitachi Power Europe GmbH Brûleur à charbon carbonisé destiné à l'allumage de combustible transporté dans un transport en phase dense
EP2141413A1 (fr) * 2008-12-22 2010-01-06 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé d'oxycombustion des carburants solides pulvérisés
CN102183022A (zh) * 2011-04-21 2011-09-14 扬州市银焰机械厂 一种多通道混合燃料燃烧器
EP2369230A2 (fr) 2010-03-22 2011-09-28 Hitachi Power Europe GmbH Brûleur doté d'un coude d'admission tangentiel à spirale
CN102213422A (zh) * 2011-04-21 2011-10-12 扬州市银焰机械厂 一种多通道混合气体燃烧器
DE102010030904A1 (de) 2010-07-02 2012-01-05 Hitachi Power Europe Gmbh Brenner mit Tangential-Spiral-Eintrittskrümmer
DE102006011326C5 (de) * 2006-03-09 2015-03-19 Alstom Technology Ltd. Rundbrenner
CN104566357A (zh) * 2013-10-29 2015-04-29 烟台龙源电力技术股份有限公司 煤粉燃烧器以及锅炉
CN104832918A (zh) * 2015-05-05 2015-08-12 集美大学 新型旋流浓淡煤粉燃烧器
CN105910101A (zh) * 2016-06-13 2016-08-31 西安西热电站信息技术有限公司 一种内外浓淡实时可调的煤粉浓缩器
CN106765075A (zh) * 2016-12-31 2017-05-31 集美大学 一种多煤种适应性的旋流煤粉燃烧器
EP3318801A4 (fr) * 2015-06-30 2019-01-09 Mitsubishi Hitachi Power Systems, Ltd. Brûleur de combustible solide

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US6699031B2 (en) 2001-01-11 2004-03-02 Praxair Technology, Inc. NOx reduction in combustion with concentrated coal streams and oxygen injection
US6702569B2 (en) 2001-01-11 2004-03-09 Praxair Technology, Inc. Enhancing SNCR-aided combustion with oxygen addition
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AU2003269127A1 (en) 2002-05-15 2003-12-02 Praxair Technology, Inc. Combustion with reduced carbon in the ash
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EP2143998B1 (fr) * 2008-07-11 2012-08-29 Rheinkalk GmbH Unité de brûleur pour combustible pulvérulent
CN101363625B (zh) * 2008-09-26 2010-06-02 哈尔滨工业大学 一种大速比中心给粉旋流煤粉燃烧器
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EP0926434A1 (fr) * 1997-12-24 1999-06-30 Entreprise Generale De Chauffage Industriel Pillard Brûleur à faible émission d'oxyde d'azote avec circuit de gaz recyclé
FR2772887A1 (fr) * 1997-12-24 1999-06-25 Pillard Chauffage Bruleur a faible emission d'oxyde d'azote avec circuit de gaz recycle
DE102006011326C5 (de) * 2006-03-09 2015-03-19 Alstom Technology Ltd. Rundbrenner
EP1862737A3 (fr) * 2006-06-01 2014-02-26 Babcock & Wilcox Power Generation Group, Inc. Cône de séparation d'air central à grand diamètre pour étendre la zone de recirculation interne
EP1862737A2 (fr) * 2006-06-01 2007-12-05 The Babcock & Wilcox Company Cône de séparation d'air central à grand diamètre pour étendre la zone de recirculation interne
EP1998112A2 (fr) * 2007-05-29 2008-12-03 Hitachi Power Europe GmbH Brûleur destiné à la combustion d'un gas à faible capacité calorifique
EP1998112A3 (fr) * 2007-05-29 2010-05-05 Hitachi Power Europe GmbH Brûleur destiné à la combustion d'un gas à faible capacité calorifique
EP2009351A3 (fr) * 2007-06-28 2009-11-04 Hitachi Power Europe GmbH Brûleur à charbon carbonisé destiné à l'allumage de combustible transporté dans un transport en phase dense
DE102007030269B4 (de) * 2007-06-28 2014-07-17 Mitsubishi Hitachi Power Systems Europe Gmbh Kohlenstaubbrenner zur Verfeuerung von in Dichtstromförderung zugeführtem Brennstoff
EP2141413A1 (fr) * 2008-12-22 2010-01-06 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé d'oxycombustion des carburants solides pulvérisés
EP2369230A2 (fr) 2010-03-22 2011-09-28 Hitachi Power Europe GmbH Brûleur doté d'un coude d'admission tangentiel à spirale
DE102010030904A1 (de) 2010-07-02 2012-01-05 Hitachi Power Europe Gmbh Brenner mit Tangential-Spiral-Eintrittskrümmer
DE102010030904B4 (de) * 2010-07-02 2017-07-27 Mitsubishi Hitachi Power Systems Europe Gmbh Brenner mit Tangential-Spiral-Eintrittskrümmer
CN102213422B (zh) * 2011-04-21 2012-12-19 扬州市银焰机械厂 一种多通道混合气体燃烧器
CN102213422A (zh) * 2011-04-21 2011-10-12 扬州市银焰机械厂 一种多通道混合气体燃烧器
CN102183022A (zh) * 2011-04-21 2011-09-14 扬州市银焰机械厂 一种多通道混合燃料燃烧器
CN104566357A (zh) * 2013-10-29 2015-04-29 烟台龙源电力技术股份有限公司 煤粉燃烧器以及锅炉
CN104832918A (zh) * 2015-05-05 2015-08-12 集美大学 新型旋流浓淡煤粉燃烧器
EP3318801A4 (fr) * 2015-06-30 2019-01-09 Mitsubishi Hitachi Power Systems, Ltd. Brûleur de combustible solide
CN105910101A (zh) * 2016-06-13 2016-08-31 西安西热电站信息技术有限公司 一种内外浓淡实时可调的煤粉浓缩器
CN105910101B (zh) * 2016-06-13 2018-01-12 西安西热电站信息技术有限公司 一种内外浓淡实时可调的煤粉浓缩器
CN106765075A (zh) * 2016-12-31 2017-05-31 集美大学 一种多煤种适应性的旋流煤粉燃烧器

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CN1152686A (zh) 1997-06-25
DE19527083A1 (de) 1997-01-30
PL181172B1 (pl) 2001-06-29
AU727761B2 (en) 2000-12-21
AU5461196A (en) 1997-01-30
UA45963C2 (uk) 2002-05-15
EP0756134B1 (fr) 2000-06-28
JPH0942611A (ja) 1997-02-14
ES2149402T3 (es) 2000-11-01
DK0756134T3 (da) 2000-11-06
ZA963667B (en) 1996-11-20
US5979342A (en) 1999-11-09
DE59605487D1 (de) 2000-08-03
US5832847A (en) 1998-11-10
CA2175113A1 (fr) 1997-01-26
PL314866A1 (en) 1997-02-03
RU2147708C1 (ru) 2000-04-20

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