CN100394107C - Smoke-controllable self-circulating type burner with low pollution - Google Patents

Smoke-controllable self-circulating type burner with low pollution Download PDF

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Publication number
CN100394107C
CN100394107C CNB2006100427695A CN200610042769A CN100394107C CN 100394107 C CN100394107 C CN 100394107C CN B2006100427695 A CNB2006100427695 A CN B2006100427695A CN 200610042769 A CN200610042769 A CN 200610042769A CN 100394107 C CN100394107 C CN 100394107C
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China
Prior art keywords
air
combustion chamber
fuel
inlet
gas
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Expired - Fee Related
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CNB2006100427695A
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Chinese (zh)
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CN1865774A (en
Inventor
惠世恩
范庆伟
周屈兰
徐通模
田成文
董陈
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Xian Jiaotong University
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Xian Jiaotong University
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Abstract

The present invention relates to a smoke-controllable self-circulating type burner with low pollution, which comprises a burning room and a fuel inlet, wherein the fuel inlet is communicated with the burning room by a pre-mixing nozzle fixing section and a pre-mixing nozzle adjusting section, and the pre-mixing nozzle adjusting section is connected with the burning room by a piston type baffle; a secondary air distributor is arranged at the outlet position of the pre-mixing nozzle adjusting section in the burning room, a secondary air inlet which is communicated with an inner cavity of the secondary air distributor is arranged on the secondary air distributor, the burning room is in the structure of double layers of sleeves, the double layers of sleeves constitute a hollow cavity, air inlets and tertiary air inlets which are communicated with the hollow cavity are respectively arranged on an outer sleeve body and an inner sleeve body of the burning room, and the inlet position of the pre-mixing nozzle fixing section is provided with a vortex blade and a primary air inlet which is communicated with the hollow cavity. The present invention adopts a structure to meet conditions required by stable, quick and efficient burn with the low pollution when changeable constituent fuel and changeable component fuel burn, and has the characteristics of wide fuel suitability, high burn efficient, and convenient processing and manufacture.

Description

The smoke-controllable self-circulating type burner with low pollution
Technical field
The invention belongs to the burner of Thermal Energy and Power Engineering technical field, be specifically related to a kind of smoke-controllable self-circulating type burner with low pollution.
Background technology
Domestic and international existing Poly-generation pattern all is to turn to the gas head with single coal gas, adjust C/Hratio in the raw gas to satisfy the needs of composite part by the CO transformationreation, the complexity that this has not only increased system and technology has caused the loss of energy, and has increased CO 2Discharging.The output of China's coke, consumption figure, export volume all rank first in the world in addition, produce 200000000 tons of coke per year by the whole nation and calculate, and except that being used to melt down burning and a small amount of generating, nearly 29,000,000,000 m are arranged still 3Coke-stove gas do not obtain utilizing and being discharged, be equivalent to transfering natural gas from the west to the east first stage of the project 12,000,000,000 m of expensive 1,200 hundred million yuan 32.4 times of/year gas pushing quantity.So many heat enters the significant wastage of being not only resource in the atmosphere, also can cause serious pollution problem.At above various situations, country " 973 " project " gasification gas and the basic research of the Poly-generation application of preparing synthetic gas altogether of the pyrolysis coal gas " suggestion that the prosperous academician of gram serves as the chief scientist of thanking by Institutes Of Technology Of Taiyuan: the characteristics of the rich carbon of gasification gas, coke-stove gas (pyrolysis coal gas) Fu Qing are combined, adopt the gasification gas of innovation and the coke-stove gas technology of reforming altogether, further make the CO in the gasification gas 2With the CH in the coke-stove gas 4Change into synthesis gas, like this, not only can improve the active ingredient of unstripped gas, reconcile hydrogen-carbon ratio, and can exempt the CO transformationreation, realize CO 2Reduce discharging, and reduce energy loss.
At present obtained commercial Application and just at the gas-steam combined circulating generation (IGCC) of commerical test, be unique output products with electric power all, the fuel of supply gas turbine generally is that calorific value is comparatively stable, and pollutant load is also lower.But for polygenerations systeme, electric power and not exclusive product, unstripped gas need be used to prepare other chemicals, and what be used to generate electricity is chemical process off-gas and residue raw gas.Therefore can there be following problem in fuel gas generation in polygenerations systeme: the composition of (1) off-gas and raw gas changes with the operation conditions of system, thereby the calorific value instability, and other relevant physics, chemical characteristic also can change; (2) parameters such as the pressure of off-gas and raw gas, temperature, flow can change with the operation conditions of system, and the fuel ratio that causes finally entering gas turbine also can change.
Therefore, for the output power product stably of combined cycle generation system of fuel gas-steam in the assurance system, at first need allotment to enter the gross calorific value of gas turbine fuel according to ruuning situation.In addition because the composition and the parameter of system's off-gas and raw gas also change, under gross calorific value meets the requirements of situation, also must guarantee fuel gas can stablize, fully, combustion with reduced pollutants, could guarantee that like this stablizing normally of gas turbine moves.Therefore, the control of burning just seems particularly important in utilizing the generating of Poly-generation off-gas and raw gas, is the key scientific problems that needs to be resolved hurrily.
Burning is the course of reaction of physics and chemical action Comprehensive Control.The main combustible component of gaseous fuel is generally methane, hydrogen, carbon monoxide and the very high alkane of various carbon content, these materials generally can burn more safely and airborne nitrogen when temperature is too high, can generate heating power type NOx, cause serious atmosphere pollution, in addition, the too high burner that also can make of temperature can't bear.
For speed venting and the raw gas in the Poly-generation, under different system operation situations, the calorific value of aerogenesis and composition proportion are different, and existing various burner, as pure diffusion burner, half premix burner, fully premixed burner etc., because its air distribution mode or air distribution element (swirl vane, bluff body, flue gas recirculation, toroidal swirl type) fixing when design, when at the fuel component, when composition changes, ignition temperature can not be better controlled, imperfect combustion may be occurred, flame-out, localized hyperthermia, deflagration, the working condition that overtemperature etc. are abominable.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of wide adaptability is provided, load regulation range is big, and ignition temperature is low, the smoke-controllable self-circulating type burner with low pollution that pollutant discharge amount is few.
For achieving the above object, the technical solution used in the present invention is: comprise combustion chamber and fuel inlet, be characterized in, fuel inlet is connected with the combustion chamber by pre-mix nozzle canned paragraph and premix cut-out governing section, premix cut-out governing section is connected with the combustion chamber by piston back plate, the exit that is positioned at premix cut-out governing section in the combustion chamber is provided with the auxiliary air air register, offer secondary wind inlet on this auxiliary air air register with its intracavity inter-connection, said combustion chamber is a double-layer sleeve structure, this double layer sleeve barrel has constituted cavity, on the outer cylinder body of combustion chamber and inner barrel, offer air inlet and tertiary air import that cavity therewith is connected respectively, the wind inlet that the porch of pre-mix nozzle canned paragraph is provided with the swirling flow blade and is connected with cavity.
The inner chamber of auxiliary air air register of the present invention is the first convergent pyramidal structure of flaring again; The outlet nozzle of premix cut-out governing section is a pyramidal structure, and also is provided with steady flame tube in nozzle.
The present invention is by the variation of pre-mixing gas combustion nozzle, the recirculation volume of control flue gas in the combustion chamber, thereby the igniting and the burning that realize becoming branch, become component fuel gas have that fuel tolerance is wide, efficiency of combustion is high and convenient processing and manufacture and flameholding, quick, efficient, oligosaprobic characteristics.
Description of drawings
Accompanying drawing is an overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are described in further detail.
Referring to accompanying drawing, the present invention includes combustion chamber 13, fuel inlet 1 is connected with combustion chamber 13 by pre-mix nozzle canned paragraph 3 and premix cut-out governing section 4, pre-mix nozzle canned paragraph 3 is connected by connecting ring 7 with premix cut-out governing section 4, premix cut-out governing section 4 is connected with combustion chamber 13 by piston back plate 8, the outlet nozzle 14 of premix cut-out governing section 4 is a pyramidal structure, and in nozzle 14, also be provided with steady flame tube 5, the exit that is positioned at premix cut-out governing section 4 in combustion chamber 13 is provided with auxiliary air air register 9, offer secondary wind inlet 10 on this auxiliary air air register 9 with its intracavity inter-connection, the inner chamber of auxiliary air air register 9 is the first convergent pyramidal structure of flaring again, said combustion chamber 13 is a double-layer sleeve structure, this double layer sleeve barrel has constituted cavity 15, on the outer cylinder body of combustion chamber 13 and inner barrel, offer air inlet 12 and tertiary air import 11 that cavity 15 therewith is connected respectively, the wind inlet 6 that the porch of pre-mix nozzle canned paragraph 3 is provided with swirling flow blade 2 and is connected with cavity 15.
The course of work of the present invention is as follows: fuel gas is infeeded in pre-mix nozzle canned paragraph 3 and the premix cut-out governing section chamber 4 by fuel inlet 1, be pre-mixed evenly with the primary air in the primary air import 6, primary air produces rotation through swirling flow blade 2 earlier before mixing.The uniform admixture of gas of premix sprays into the combustion chamber by the conical nozzle 14 of premix cut-out governing section 4, air velocity is higher, form a low-pressure area (with respect to the combustion chamber part at auxiliary air air register rear portion) in nozzle 14 exits, flue gas is back to nozzle exit by the annular space of reserving between auxiliary air air register 9 and the combustion chamber 13, light fresh premixed fuel gas, the auxiliary air that fuel after catching fire enters through secondary wind inlet 10 in auxiliary air air register 9 mixes, reduce the temperature of combustion reaction, and in the combustion chamber, rear portion, finish whole chemical reactions and also further with through tertiary air import 11 tertiary airs mix.Needed one, the tertiary air of burning is infeeded by air inlet 12, and auxiliary air is infeeded by secondary wind inlet 10, and four bursts of air inflows can be controlled separately, to reach best combustion efficiency.
When fuel gas composition, change of component, by changing the position of premix cut-out governing section 4, be that circumferential weld crack between regulating piston formula baffle plate 8 and the auxiliary air air register 9 changes thereupon, the corresponding change of resistance that flue gas recycled refluxes, the flue gas recycled amount also changes, thereby reaches the purpose of regulating the flue gas recycled amount.
Adopt fuel tolerance of the present invention wide, to becoming branch, becoming component fuel good adaptability is arranged; Adopt the premixed combustion mode, the premixed combustion mode makes fuel gas catch fire, burn in the condition that departs from stoichiometric ratio, can reduce the NOx growing amount; Load regulation range is bigger, takes the method for controlled flue gas self internal circulating load, strengthens stable ignition, the burning of fresh fuel, thereby has increased the load regulation range of burner; Ignition temperature is lower, adopts the mode of premixed combustion, and ignition temperature can control to lower level, the increment of auxiliary air is controlled simultaneously, also can reduce the bulk temperature level of combustion chamber, reduces the NOx discharge capacity, pollutant discharge amount low NOx drainage amount is few, adapts to environmental requirement.

Claims (3)

1. smoke-controllable self-circulating type burner with low pollution, comprise combustion chamber (13) and fuel inlet (1), it is characterized in that: fuel inlet (1) is connected with combustion chamber (13) by pre-mix nozzle canned paragraph (3) and premix cut-out governing section (4), premix cut-out governing section (4) is connected with combustion chamber (13) by piston back plate (8), the exit that is positioned at premix cut-out governing section (4) in combustion chamber (13) is provided with auxiliary air air register (9), offer secondary wind inlet (10) on this auxiliary air air register (9) with its intracavity inter-connection, said combustion chamber (13) is a double-layer sleeve structure, this double layer sleeve barrel has constituted cavity (15), on the outer cylinder body of combustion chamber (13) and inner barrel, offer air inlet (12) and tertiary air import (11) that cavity (15) therewith is connected respectively, the wind inlet (6) that the porch of pre-mix nozzle canned paragraph (3) is provided with swirling flow blade (2) and is connected with cavity (15).
2. smoke-controllable self-circulating type burner with low pollution according to claim 1 is characterized in that: the inner chamber of said auxiliary air air register (9) is the first convergent pyramidal structure of flaring again.
3. smoke-controllable self-circulating type burner with low pollution according to claim 1 is characterized in that: the outlet nozzle (14) of said premix cut-out governing section (4) is a pyramidal structure, and also is provided with steady flame tube (5) in nozzle (14).
CNB2006100427695A 2006-04-30 2006-04-30 Smoke-controllable self-circulating type burner with low pollution Expired - Fee Related CN100394107C (en)

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CN100394107C true CN100394107C (en) 2008-06-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192515A (en) * 2010-03-10 2011-09-21 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace

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Publication number Priority date Publication date Assignee Title
CN102679347A (en) * 2011-03-15 2012-09-19 佛山市启迪节能科技有限公司 Emission-reduction premixing type secondary burner
CN102759101A (en) * 2011-04-25 2012-10-31 佛山市启迪节能科技有限公司 Working method and device of pre-mixing type secondary combustor
CN102226522B (en) * 2011-06-01 2013-01-23 中国科学院广州能源研究所 Gas burner
CN102537958B (en) * 2012-02-20 2014-08-13 北京交通大学 Cone rotor type gas burner
EP2821699A1 (en) * 2013-07-02 2015-01-07 Haldor Topsøe A/S Mixing of recycle gas with fuel gas to a burner
CN105299642B (en) * 2015-11-02 2018-05-15 无锡华光锅炉股份有限公司 A kind of gas burner structure
CN107166395B (en) * 2017-05-31 2019-01-29 北京理工大学 A kind of self-loopa low nitrogen oxide swirling burner
CN108443865A (en) * 2018-02-27 2018-08-24 常州凯丽纺织有限公司 A kind of three eddy flow ignition cylinders of three eddy flow fire-biomass gasification combustion engines
CN110345475B (en) * 2019-07-23 2020-05-19 华中科技大学 Premixing type anti-backfire flameless combustor
CN111023090A (en) * 2019-12-26 2020-04-17 常州大学 Double-cyclone ultralow nitrogen gas burner with adjustable secondary air

Citations (6)

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Publication number Priority date Publication date Assignee Title
US5098284A (en) * 1990-06-15 1992-03-24 Veg-Gastinstituut N. V. Premix gas burner having a high turn down ratio
JPH04190002A (en) * 1990-11-26 1992-07-08 Toshiba Corp Burner
JPH07324750A (en) * 1994-05-30 1995-12-12 Hitachi Ltd Operation method of gas turbine combustor
JP2001074207A (en) * 1999-08-31 2001-03-23 Tokyo Gas Co Ltd LOW NOx BURNER
EP1211459A2 (en) * 1996-04-09 2002-06-05 Toyota Jidosha Kabushiki Kaisha Combustion apparatus
CN1756925A (en) * 2003-03-07 2006-04-05 瑞特克股份有限公司 Gas combustion device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5098284A (en) * 1990-06-15 1992-03-24 Veg-Gastinstituut N. V. Premix gas burner having a high turn down ratio
JPH04190002A (en) * 1990-11-26 1992-07-08 Toshiba Corp Burner
JPH07324750A (en) * 1994-05-30 1995-12-12 Hitachi Ltd Operation method of gas turbine combustor
EP1211459A2 (en) * 1996-04-09 2002-06-05 Toyota Jidosha Kabushiki Kaisha Combustion apparatus
JP2001074207A (en) * 1999-08-31 2001-03-23 Tokyo Gas Co Ltd LOW NOx BURNER
CN1756925A (en) * 2003-03-07 2006-04-05 瑞特克股份有限公司 Gas combustion device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192515A (en) * 2010-03-10 2011-09-21 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace
CN102192515B (en) * 2010-03-10 2012-11-14 中国石油天然气股份有限公司 Compulsory mixed tail gas furnace

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