CN107033926A - Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning - Google Patents

Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning Download PDF

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Publication number
CN107033926A
CN107033926A CN201710467659.1A CN201710467659A CN107033926A CN 107033926 A CN107033926 A CN 107033926A CN 201710467659 A CN201710467659 A CN 201710467659A CN 107033926 A CN107033926 A CN 107033926A
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China
Prior art keywords
outlet
combustion
combustion air
gas
flue
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CN201710467659.1A
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CN107033926B (en
Inventor
景殿策
严国华
刘洪春
王满
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Acre Coking and Refractory Engineering Consulting Corp MCC
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Acre Coking and Refractory Engineering Consulting Corp MCC
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00Heating of coke ovens with combustible gases
    • C10B21/10Regulating and controlling the combustion
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B21/00Heating of coke ovens with combustible gases
    • C10B21/10Regulating and controlling the combustion
    • C10B21/18Recirculating the flue gases

Abstract

The present invention relates to a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning, poor gas outlet at bottom absolute altitude is higher than combustion air outlet at bottom absolute altitude;Combustion air outlet at bottom absolute altitude is less than exhaust gas circulation hole bottom surface absolute altitude or consistent with its absolute altitude;The absolute altitude of the outlet of each section of combustion air and each section of poor gas outlet in the outlet of multistage poor gas in the outlet of multistage combustion air is differed, and the absolute altitude of final stage combustion air outlet is higher than the absolute altitude that final stage poor gas is exported;The coal gas amount that the outlet of final stage poor gas is fed is feed coal gas total amount 1%~50%, and the combustion-supporting air quantity that the outlet of final stage combustion air is fed is the 1%~50% of infeed combustion air total amount.Present invention realization is gently with a variety of low nitrogen oxide burning modes of depth hypoxemia dilute combustion, bias combustion, fuel-staged combustion and Researched of Air Staging Combustion Burning Pulverized Coal, NOx generation, the higher environmental requirement of satisfaction effectively in suppression flue combustion process.

Description

Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning
Technical field
The present invention relates to coke oven technical field, more particularly to a kind of it can realize the coke oven combustion chamber of low nitrogen oxide burning Flue structure.
Background technology
Combustion chamber and carbonization chamber that it is alternate configuration under furnace roof, furnace roof that modern coking furnace shaft topmost, which is, lower portion of furnace body There is the chute area of regenerator and connection regenerator and combustion chamber, the bottom flue of each regenerator bottom passes through exchange shutter and cigarette Road is connected.Flue is located in coke oven base or basic both sides, and chimney is led in flue end.Therefore coke oven is charing by three Shi Liang areas Room, combustion chamber, regenerator, chute area, furnace roof area, and foundation composition.Combustion chamber is in carbonization chamber both sides, by multiple vertical fire Road is constituted.Regenerator is located at lower portion of furnace body, point air regenerator and gas regenerator.
A pair of duplex flues (deserve to be called respectively and fire, decline quirk) of each two flue composition are walked respectively in combustion chamber Provided with hole is crossed at the top of ascending air and down current, each pair duplex flue, bottom is provided with exhaust gas circulation hole, makes 2 vertical fire Road is connected.Combustion air, the coal gas for entering flue from flue bottom form ascending air after diffusion combustion, rise gas Flow through to enter across hole and decline quirk as down current, down current is joined through quirk bottom exhaust gas circulation hole into ascending air With circulation.
With the transformation of modern mode of production, higher requirement is proposed to coke oven, such as production capacity is big, heating system resistance Power is small, adjusts easy to control, and low azo-cycle is protected etc..The current existing lower spray coke oven of China is improves in flue height to homogeneous heating Property, produce load requirement is met, the modes such as height lamp holder, waste gas circulation and combustion-supporting gas segmentation supply are employed, but suppressed Still there is improved space in terms of NO_x formation in combustion process.
The content of the invention
The invention provides a kind of coke oven combustion chamber flue structure for realizing low nitrogen oxide burning, by adding to segmentation Each combustion air outlet and poor gas are exported in hot type coke oven combustion chamber flue position and the confession of combustion air and coal gas Enter amount to be defined, realize gently many with depth hypoxemia dilute combustion, bias combustion, fuel-staged combustion and Researched of Air Staging Combustion Burning Pulverized Coal Low nitrogen oxide burning mode is planted, effectively suppresses the generation of NOx in flue combustion process, higher environmental requirement is met.
In order to achieve the above object, the present invention is realized using following technical scheme:
A kind of coke oven combustion chamber flue structure of low nitrogen oxide burning, coke oven combustion chamber is made up of multiple flues, Each two flue constitutes a duplex flue, and the top of duplex flue across hole by being connected, and bottom is followed by waste gas Annular distance is connected;Each flue bottom sets rich gas brick gas passage, poor gas outlet at bottom and combustion air outlet at bottom respectively, Flue partition is exported along height to the outlet of multistage combustion air and multistage poor gas is set;The poor gas outlet at bottom absolute altitude is higher than 50~500mm of combustion air outlet at bottom absolute altitude;Combustion air outlet at bottom absolute altitude less than exhaust gas circulation hole bottom surface absolute altitude or with Exhaust gas circulation hole bottom surface absolute altitude is consistent;During each section of combustion air outlet in the outlet of multistage combustion air is exported with multistage poor gas Each section of poor gas outlet absolute altitude differ, and final stage combustion air outlet absolute altitude be higher than final stage poor gas The absolute altitude of outlet;The coal gas amount that the outlet of final stage poor gas is fed is feeds the 1%~50% of coal gas total amount, and final stage is helped The combustion-supporting air quantity of air outlet slit infeed is fired to feed the 1%~50% of combustion air total amount.
Combustion air road and meager coal air flue are set in the flue partition, along height to combustion air road passes through multiple combustion-supporting Air outlet slit connects flue, and meager coal air flue is exported and meager coal by multiple poor gas outlet flues, and combustion air Gas outlet is inclined upward, narrowed passage into flue.
The rich gas outlet of the rich gas brick gas passage, combustion air outlet at bottom, each section of combustion air are exported and each Section meager coal gas outlet sets flow regulator respectively.
The multistage combustion air outlet and the number of fragments that multistage poor gas is exported are identical or different.
Compared with prior art, the beneficial effects of the invention are as follows:
1) relative altitude of poor gas outlet at bottom, combustion air outlet at bottom and exhaust gas circulation hole, preheating are rationally set Combustion air afterwards enter flue when first mix with waste gas, reduction combustion air in oxygen concentration, then up spray and Coal gas catalytic combustion, realize gently with depth hypoxemia dilute combustion so that NOx generation is obtained in flue combustion process Effectively suppress;
2) each section of combustion air outlet and poor gas outlet set highly inconsistent in flue, so as to ensure each section of burning Process always has that excessive combustion air reacts with the flammable solid/liquid/gas reactions of low concentration or excessive combustible gas with oxygen deprivation combustion air, The combustion process of deep or light deviation in flue is formed, so as to avoid the generation of coal gas and the quick vigorous combustion of combustion air;
3) segmentation feeds excessive combustion air or poor gas, can reduce the temperature of waste gas after upstream combustion, suppresses NOx generation in combustion process;
4) the coal gas amount that the outlet of final stage poor gas is fed in flue accounts for the 1~50% of total coal gas amount, it is ensured that at this Ascending air overall air coefficient of excess is less than 1, high-temp waste gas residual reducing atmosphere is reduced and has generated NOx, so as to reduce the NOx concentration in waste gas;
5) bias combustion, fuel-staged combustion and a variety of low nitrogen oxide burning modes of Researched of Air Staging Combustion Burning Pulverized Coal are realized, make to stand NOx generation is effectively suppressed in every one-level combustion process in quirk.
Brief description of the drawings
Fig. 1 is the structural representation of the coke oven combustion chamber flue structure of the present invention for realizing low nitrogen oxide burning.
Fig. 2 is the A-A sectional views in Fig. 1.
Fig. 3 is the B-B sectional views in Fig. 1.
Fig. 4 is the C-C sectional views in Fig. 1.
In figure:1. the poor gas bottom of 4. meager coal air flue of flue 2. flue partition, 3. rich gas brick gas passage 5. goes out It is combustion-supporting that 6. poor gas of mouth export the 7. final stage poor gas outlet combustion air outlet at bottom 10. of 8. combustion air road 9. The exhaust gas circulation hole of hole 13. is crossed in the final stage combustion air of air outlet slit 11. outlet 12.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings:
As Figure 1-Figure 4, a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning of the present invention, coke oven Combustion chamber is made up of multiple flues 1, and each two flue 1 is constituted to be passed through at the top of a duplex flue, duplex flue Connected across hole 12, bottom is connected by exhaust gas circulation hole 13;Each bottom of flue 1 sets rich gas brick gas passage 3 respectively, poor Coal gas outlet at bottom 5 and combustion air outlet at bottom 9, flue partition 2 export 10 and multistage along height to multistage combustion air is set Poor gas outlet 6;The absolute altitude of poor gas outlet at bottom 5 is higher than the 50~500mm of absolute altitude of combustion air outlet at bottom 9;Combustion air bottom Portion exports 9 absolute altitudes and is less than the bottom surface absolute altitude of exhaust gas circulation hole 13 or consistent with the bottom surface absolute altitude of exhaust gas circulation hole 13;Multistage combustion air The absolute altitude of each section of combustion air outlet 10 and each section of poor gas outlet 6 in the outlet of multistage poor gas in outlet is differed, And the absolute altitude of final stage combustion air outlet 11 exports 7 absolute altitude higher than final stage poor gas;Final stage poor gas goes out The coal gas amounts that mouth 7 is fed is feed the 1%~50% of coal gas total amount, and final stage combustion air exports the combustion airs of 11 infeeds Measure to feed the 1%~50% of combustion air total amount.
Combustion air road 8 and meager coal air flue 4 are set in the flue partition 2, along height to combustion air road 8 is by multiple Combustion air outlet 10 connects flue 1, and meager coal air flue 4 connects flue 1, and combustion air by multiple poor gas outlet 6 It is inclined upward, narrowed passage into flue 1 that outlet 10 and poor gas, which export 6,.
Rich gas outlet, combustion air outlet at bottom 9, each section of combustion air outlet 10 of the rich gas brick gas passage 3 And flow regulator is set respectively at each section of poor gas outlet 6.
The multistage combustion air outlet and the number of fragments that multistage poor gas is exported are identical or different.
In the present invention, the top of 2 flues 1 in duplex flue across hole 12 by connecting, and bottom passes through waste gas Circulation port 13 is connected;The combustion air road 8 and meager coal air flue 4 mutually completely cut off is provided with flue partition 2, along flue 1 It is high to flue partition 2 on set the outlet of multistage combustion air, multistage poor gas to export respectively;Poor gas outlet at bottom 5 is set Put in the bottom of flue partition 2;Rich gas brick gas passage 1 is arranged on the flue partition 2 that does not open up exhaust gas circulation hole 13 Both sides.
The combustion air outlet at bottom 9 and poor gas outlet at bottom 5 that the present invention is pointed to the bottom of flue 1 first are closed Reason design, that is, limit combustion air outlet at bottom 9 less than exhaust gas circulation hole 13 or with its contour arrangement, the bottom of flue partition 2 Poor gas outlet at bottom 5 higher than the bottom surface absolute altitude arrangement of exhaust gas circulation hole 13 so that the combustion air after preheating enters vertical fire First mixed during road 1 with waste gas, the concentration of oxygen in reduction combustion air, injection and coal gas catalytic combustion, form temperature then up With with depth hypoxemia dilute combustion, and then reduce NOx growing amount.
The bottom of flue 1 is connected with coke oven chute, and when coke oven is using poor gas or mixed gas heating, combustion air is same When feed in combustion air road 8 on the bottom of flue 1 and flue partition 2, which part combustion air is by combustion air bottom Portion outlet 9 sprays, and each section combustion air outlet 10 of remaining combustion air on flue partition 2 sprays.Poor gas is mixed The meager coal air flue 4 on coal gas infeed flue partition 2 is closed, which part poor gas is sprayed by poor gas outlet at bottom 5, remaining Each section poor gas outlet 6 of the poor gas on flue partition 2 sprays.In the present invention, the outlet 7 of final stage poor gas is always low 11 are exported in final stage combustion air.
Each combustion air outlet 9,10,11 and each poor gas outlet 5,6,7 set flow regulator respectively, for adjusting The flow of combustion air or coal gas, can also be calculated by analog simulation and determine that gas vent area of section is controlled to gas flow System.In coke oven production heating process, the coal gas and combustion-supporting air quantity respectively exported in regulation flue 1 makes the sky of combustion process Gas coefficient of excess always deviates 1, and the coal gas that can be sprayed by hypomere of flame of epimere burning generation or combustion air cooling, with This makes the NOx in flue combustion process obtain Comprehensive Control.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (4)

1. a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning, coke oven combustion chamber is made up of multiple flues, often Two flues constitute a duplex flue, and the top of duplex flue across hole by connecting, and bottom passes through waste gas circulation Hole is connected;Each flue bottom sets rich gas brick gas passage, poor gas outlet at bottom and combustion air outlet at bottom respectively, stands Quirk partition wall is exported along height to the outlet of multistage combustion air and multistage poor gas is set;Characterized in that, the poor gas bottom goes out Mouth absolute altitude is higher than 50~500mm of combustion air outlet at bottom absolute altitude;Combustion air outlet at bottom absolute altitude is less than waste gas circulation bottom hole Face absolute altitude is consistent with exhaust gas circulation hole bottom surface absolute altitude;Each section of combustion air outlet in the outlet of multistage combustion air is poor with multistage The absolute altitude of each section of poor gas outlet in gas exit is differed, and the absolute altitude of final stage combustion air outlet is higher than finally The absolute altitude of one section of poor gas outlet;The coal gas amount that the outlet of final stage poor gas is fed is the 1%~50% of infeed coal gas total amount, The combustion-supporting air quantity that the outlet of final stage combustion air is fed is the 1%~50% of infeed combustion air total amount.
2. a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning according to claim 1, it is characterised in that Combustion air road and meager coal air flue are set in the flue partition, along height to combustion air road is exported by multiple combustion airs Flue is connected, meager coal air flue is by multiple poor gas outlet flues, and combustion air outlet and poor gas outlet are equal For inclined upward, narrowed passage into flue.
3. a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning according to claim 1, it is characterised in that Rich gas outlet, combustion air outlet at bottom, each section of combustion air outlet and each section of poor gas of the rich gas brick gas passage Exit sets flow regulator respectively.
4. a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning according to claim 1, it is characterised in that The multistage combustion air outlet and the number of fragments that multistage poor gas is exported are identical or different.
CN201710467659.1A 2017-06-20 2017-06-20 Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning Active CN107033926B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108728127A (en) * 2018-07-31 2018-11-02 中冶焦耐(大连)工程技术有限公司 The low-nitrogen discharged coke oven heating system and its adjusting method heated using rich gas
CN108753314A (en) * 2018-05-22 2018-11-06 北京科技大学 A kind of burner and combustion method of coke oven vertical flame path
WO2019053107A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Industrial Solutions Ag Coke oven device with eccentric inlets for producing coke and method for operating the coke oven device and control system and use
DE102017216439A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus with circulating flow path around it for producing coke and method for operating the coke oven apparatus, as well as control means and use
DE102017216437A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus having eccentric inlets for producing coke, and methods of operating the coke oven apparatus, and controller and use
DE102017216436A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus with centric recirculation for producing coke and method for operating the coke oven apparatus as well as controller and use
CN110527525A (en) * 2019-09-27 2019-12-03 中冶焦耐(大连)工程技术有限公司 Chute height export structure in a kind of flue
CN110938447A (en) * 2019-12-27 2020-03-31 中冶焦耐(大连)工程技术有限公司 Novel coke oven structure and sectional heating combustion method thereof
WO2020225013A1 (en) 2019-05-08 2020-11-12 Thyssenkrupp Industrial Solutions Ag Coke oven device for producing coke, method for operating the coke oven device, and use
CN113122284A (en) * 2021-05-20 2021-07-16 中冶焦耐(大连)工程技术有限公司 Method for adjusting low nitrogen emission of reheating coke oven

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CN102721058A (en) * 2012-06-26 2012-10-10 上海华之邦能源科技有限公司 Gas burner with low NOX
CN206887003U (en) * 2017-06-20 2018-01-16 中冶焦耐(大连)工程技术有限公司 Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244786A (en) * 1977-08-24 1981-01-13 Dr. C. Otto & Comp. G.M.B.H. Double flue arrangement in heating walls for horizontal coke ovens
CN1510335A (en) * 2002-12-26 2004-07-07 上海理工大学 Low NOx combustor with mixed coal and gas fuel
CN200989589Y (en) * 2006-08-29 2007-12-12 上海理工大学 Gas refiring and double-path level thin and thick integrated low NOx burner
CN102721058A (en) * 2012-06-26 2012-10-10 上海华之邦能源科技有限公司 Gas burner with low NOX
CN206887003U (en) * 2017-06-20 2018-01-16 中冶焦耐(大连)工程技术有限公司 Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017216437A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus having eccentric inlets for producing coke, and methods of operating the coke oven apparatus, and controller and use
DE102017216436A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus with centric recirculation for producing coke and method for operating the coke oven apparatus as well as controller and use
WO2019053107A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Industrial Solutions Ag Coke oven device with eccentric inlets for producing coke and method for operating the coke oven device and control system and use
WO2019053103A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Industrial Solutions Ag Coke oven device with circumflowed circular current path for producing coke and method for operating the coke oven device and control system and use
WO2019053105A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Industrial Solutions Ag Coke oven device with central recirculation for producing coke and method for operating the coke oven device and control system and use
DE102017216439A1 (en) 2017-09-15 2019-03-21 Thyssenkrupp Ag Coke oven apparatus with circulating flow path around it for producing coke and method for operating the coke oven apparatus, as well as control means and use
CN108753314A (en) * 2018-05-22 2018-11-06 北京科技大学 A kind of burner and combustion method of coke oven vertical flame path
CN108728127A (en) * 2018-07-31 2018-11-02 中冶焦耐(大连)工程技术有限公司 The low-nitrogen discharged coke oven heating system and its adjusting method heated using rich gas
CN108728127B (en) * 2018-07-31 2023-08-25 中冶焦耐(大连)工程技术有限公司 Low-nitrogen-emission coke oven heating system adopting rich gas heating and adjusting method thereof
WO2020225013A1 (en) 2019-05-08 2020-11-12 Thyssenkrupp Industrial Solutions Ag Coke oven device for producing coke, method for operating the coke oven device, and use
DE102019206628A1 (en) * 2019-05-08 2020-11-12 Thyssenkrupp Ag Coke oven device for producing coke and method for operating the coke oven device and use
CN110527525A (en) * 2019-09-27 2019-12-03 中冶焦耐(大连)工程技术有限公司 Chute height export structure in a kind of flue
CN110938447A (en) * 2019-12-27 2020-03-31 中冶焦耐(大连)工程技术有限公司 Novel coke oven structure and sectional heating combustion method thereof
CN113122284A (en) * 2021-05-20 2021-07-16 中冶焦耐(大连)工程技术有限公司 Method for adjusting low nitrogen emission of reheating coke oven

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