CN102777891A - Furnace combustion structure for reducing NOx (nitrogen oxide) discharge - Google Patents

Furnace combustion structure for reducing NOx (nitrogen oxide) discharge Download PDF

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Publication number
CN102777891A
CN102777891A CN2012102503307A CN201210250330A CN102777891A CN 102777891 A CN102777891 A CN 102777891A CN 2012102503307 A CN2012102503307 A CN 2012102503307A CN 201210250330 A CN201210250330 A CN 201210250330A CN 102777891 A CN102777891 A CN 102777891A
Authority
CN
China
Prior art keywords
spout
discharge
nox
furnace combustion
gaseous fuel
Prior art date
Application number
CN2012102503307A
Other languages
Chinese (zh)
Inventor
何雁飞
韦志平
陈益增
孟慧
Original Assignee
无锡华光锅炉股份有限公司
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 无锡华光锅炉股份有限公司 filed Critical 无锡华光锅炉股份有限公司
Priority to CN2012102503307A priority Critical patent/CN102777891A/en
Publication of CN102777891A publication Critical patent/CN102777891A/en

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Abstract

The invention provides a furnace combustion structure for reducing NOx (nitrogen oxide) discharge. The NOx generated in a main combustion area generates reduction reaction to reduce discharge of NOx of a boiler when passing through a reburning zone, thereby reducing the NOx and ensuring the discharge accords with national requirements. The furnace combustion structure comprises a hearth, wherein a pulverized coal main combustor is arranged on an inner wall of the hearth. The furnace combustion structure is characterized in that: a gas fuel reburning nozzle is arranged above the pulverized coal main combustor; a burn-out air nozzle is arranged above the gas fuel reburning nozzle, and the fuel led by the gas fuel reburning nozzle is tail gas generated by a chemical device.

Description

Reduce NO xThe burner hearth burning structure of discharging
Technical field
The present invention relates to the technical field of structures of boiler, be specially and reduce NO xThe burner hearth burning structure of discharging.
Background technology
Existing pulverized-coal fired boiler generally all can allow to mix the burning proportion of gas; And the arrangement of this gas spout has two kinds; A kind of is that it directly is arranged in the overfiren air port of coal burner; Another kind is to arrange a gas specific spout separately in the main burner district, and these arrangements all are so that gas is mixed burning as purpose of design.Along with the development of improving day by day of requiring of Environmental Protection in China and economic technology, particularly country in 2011 has issued after " thermal power plant's atmosphere pollutants emission standards ", to the pollutant of new and old power plant NO particularly xDischarging has proposed very harsh requirement, and wherein coal-fired power station boiler reduces NO xIt is top priority.
Summary of the invention
To the problems referred to above, the invention provides and reduce NO xThe burner hearth burning structure of discharging, it makes at the NO of main combustion zone generation xProduce reduction reaction during through the reburning zone and reduce boiler NO xDischarging, thereby reduce NO x, guarantee that discharging meets national requirements.
Reduce NO xThe burner hearth burning structure of discharging; Its technical scheme is such: it comprises burner hearth; The inwall of said burner hearth is provided with the coal dust main burner; It is characterized in that: the top of said coal dust main burner is provided with gaseous fuel and fires spout again, and the top that said gaseous fuel fires spout again is provided with the burnt wind spout, and the fuel that said gaseous fuel fires the spout feeding again is the tail gas that chemical plant installations produced.
It is further characterized in that: the volume content that the tail gas that said chemical plant installations produced is specially methane is greater than 30% mist.
After adopting said structure of the present invention; At the boiler coal-ash main burner; The top that is the primary zone arranges that gaseous fuel fires spout again and forms the reducing zone; Arrange that above gaseous fuel fires spout again the burnt wind spout forms burnt zone, and gaseous fuel to fire the fuel that spout feeds again be the tail gas that chemical plant installations produced, it makes the NO that generates in main combustion zone xThe tail gas generation reduction reaction that is produced with chemical plant installations when firing spout again through gaseous fuel reduces boiler NO xDischarging, thereby reduce NO x, guarantee that discharging meets national requirements; On the other hand, the tail gas that chemical plant installations produced is turned waste into wealth, practiced thrift production cost.
Description of drawings
Fig. 1 is a front view structural representation of the present invention.
The specific embodiment
See Fig. 1; It comprises burner hearth 1; The inwall of burner hearth 1 is provided with coal dust main burner 2, and the distance H spaced above of coal dust main burner 2 is provided with gaseous fuel and fires spout 3 again, and the area of space that gaseous fuel fires spout 3 pairing burner hearths again is the reducing zone; The distance B spaced above that gaseous fuel fires spout 3 again is provided with burnt wind spout 4; The area of space of burnt wind spout 4 pairing burner hearths is a burnt zone, and it is the tail gas that chemical plant installations produced that gaseous fuel fires the fuel that spout 4 feeds again, and the volume content that the tail gas that chemical plant installations produced is specially methane is greater than 30% mist.
  

Claims (2)

1. reduce NO xThe burner hearth burning structure of discharging; It comprises burner hearth; The inwall of said burner hearth is provided with the coal dust main burner; It is characterized in that: the top of said coal dust main burner is provided with gaseous fuel and fires spout again, and the top that said gaseous fuel fires spout again is provided with the burnt wind spout, and the fuel that said gaseous fuel fires the spout feeding again is the tail gas that chemical plant installations produced.
2. reduction NO according to claim 1 xThe burner hearth burning structure of discharging is characterized in that: the volume content that the tail gas that said chemical plant installations produced is specially methane is greater than 30% mist.
CN2012102503307A 2012-07-19 2012-07-19 Furnace combustion structure for reducing NOx (nitrogen oxide) discharge CN102777891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102503307A CN102777891A (en) 2012-07-19 2012-07-19 Furnace combustion structure for reducing NOx (nitrogen oxide) discharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102503307A CN102777891A (en) 2012-07-19 2012-07-19 Furnace combustion structure for reducing NOx (nitrogen oxide) discharge

Publications (1)

Publication Number Publication Date
CN102777891A true CN102777891A (en) 2012-11-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102980174A (en) * 2012-11-30 2013-03-20 山东大学 Coal-gas combined efficient low-emission grate firing combustion apparatus and technology

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2501564Y (en) * 2001-10-31 2002-07-24 清华大学 Apparatus by bio-matter pyrolytic gas refiring denitration
CN1387006A (en) * 2001-05-18 2002-12-25 清华大学 Method and apparatus for reducing exhaustion of nitrogen oxides from coal-fired boiler
CN1415891A (en) * 2001-10-31 2003-05-07 清华大学 Combustion method and device for denitration by refueling pyrolysis gas of biomass
CN101016986A (en) * 2007-02-28 2007-08-15 哈尔滨工业大学 Method for burning of low nitrogen oxides in coal-burning boiler
CN101021316A (en) * 2007-03-14 2007-08-22 哈尔滨工业大学 Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology
CN101050853A (en) * 2007-04-03 2007-10-10 哈尔滨工业大学 Method for reducing nitrogen oxide of powder coal boiler mixed burning gas fuel
CN101062461A (en) * 2007-04-27 2007-10-31 南京师范大学 Method and system for combinablenably removing SO2, NOx and Hg in coal smoke gas by using recombustion of biomass
CN202791991U (en) * 2012-07-19 2013-03-13 无锡华光锅炉股份有限公司 Hearth combustion structure capable of lowing NOx discharge

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1387006A (en) * 2001-05-18 2002-12-25 清华大学 Method and apparatus for reducing exhaustion of nitrogen oxides from coal-fired boiler
CN2501564Y (en) * 2001-10-31 2002-07-24 清华大学 Apparatus by bio-matter pyrolytic gas refiring denitration
CN1415891A (en) * 2001-10-31 2003-05-07 清华大学 Combustion method and device for denitration by refueling pyrolysis gas of biomass
CN101016986A (en) * 2007-02-28 2007-08-15 哈尔滨工业大学 Method for burning of low nitrogen oxides in coal-burning boiler
CN101021316A (en) * 2007-03-14 2007-08-22 哈尔滨工业大学 Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology
CN101050853A (en) * 2007-04-03 2007-10-10 哈尔滨工业大学 Method for reducing nitrogen oxide of powder coal boiler mixed burning gas fuel
CN101062461A (en) * 2007-04-27 2007-10-31 南京师范大学 Method and system for combinablenably removing SO2, NOx and Hg in coal smoke gas by using recombustion of biomass
CN202791991U (en) * 2012-07-19 2013-03-13 无锡华光锅炉股份有限公司 Hearth combustion structure capable of lowing NOx discharge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102980174A (en) * 2012-11-30 2013-03-20 山东大学 Coal-gas combined efficient low-emission grate firing combustion apparatus and technology

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Application publication date: 20121114