CN206887003U - 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 PDFInfo
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- CN206887003U CN206887003U CN201720715594.3U CN201720715594U CN206887003U CN 206887003 U CN206887003 U CN 206887003U CN 201720715594 U CN201720715594 U CN 201720715594U CN 206887003 U CN206887003 U CN 206887003U
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- combustion air
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Abstract
A kind of coke oven combustion chamber flue structure for realizing low nitrogen oxide burning is the utility model is related to, 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；Each section of combustion air exports and the absolute altitude of each section of poor gas outlet in the outlet of multistage poor gas in multistage combustion air exports differ, and the absolute altitude of final stage combustion air exports is higher than the absolute altitude of final stage poor gas outlet；For the gas volume of final stage poor gas outlet infeed to feed the 1%~50% of coal gas total amount, the combustion-supporting air quantity that final stage combustion air exports are fed is the 1%~50% of infeed combustion air total amount.The utility model is realized 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, is effectively suppressed the generation of NOx in flue combustion process, is met higher environmental requirement.
Description
Technical field
Coke oven technical field is the utility model is related to, more particularly to a kind of coke oven combustion that can realize low nitrogen oxide burning
Burn room flue structure.
Background technology
Modern coking furnace shaft topmost is furnace roof, is combustion chamber and the carbonization chamber of alternate configuration under furnace roof, lower portion of furnace body
There is regenerator and connect the chute area of regenerator and combustion chamber, the bottom flue of each regenerator bottom passes through exchange shutter and cigarette
Road connects.Flue is located in coke oven base or basic both sides, and chimney is led in flue end.Therefore coke oven is carbonized 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 formed.Regenerator is located at lower portion of furnace body, divides 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
Ascending air and down current, each pair duplex flue top, which is provided with, crosses over hole, and 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 turns into down current across hole into quirk is declined, and 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, as production capacity is big, heating system resistance
Power is small, and adjustment control is convenient, and low azo-cycle is protected etc..The existing lower spray coke oven in China is improves in flue height to homogeneous heating at present
Property, meet produce load requirement, employ the modes such as height lamp holder, waste gas circulation and combustion-supporting gas segmentation supply, but suppressing
Still there is improved space in terms of NO_x formation in combustion process.
The content of the invention
The utility model provides a kind of coke oven combustion chamber flue structure for realizing low nitrogen oxide burning, by dividing
Section heated type coke oven combustion chamber flue in each combustion air exports and poor gas outlet position be defined, realize gently with
Depth hypoxemia dilute combustion, bias combustion, fuel-staged combustion and a variety of low nitrogen oxide burning modes of Researched of Air Staging Combustion Burning Pulverized Coal, have
Effect suppresses the generation of NOx in flue combustion process, meets higher environmental requirement.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of coke oven combustion chamber flue structure of low nitrogen oxide burning, coke oven combustion chamber are made up of multiple flues,
Each two flue forms a duplex flue, and by being connected across hole, bottom is followed by waste gas at the top of duplex flue
Annular distance connects；Each flue bottom sets rich gas brick gas passage, poor gas outlet at bottom and combustion air outlet at bottom respectively,
Flue partition is along high to setting multistage combustion air exports and multistage poor gas exports；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 exports in multistage combustion air exports export with multistage poor gas
The absolute altitude of each section of poor gas outlet differ, and the absolute altitude of final stage combustion air exports is higher than final stage poor gas
The absolute altitude of outlet；To feed the 1%~50% of coal gas total amount, final stage helps the gas volume that the outlet of final stage poor gas is fed
It is the 1%~50% of infeed combustion air total amount to fire the combustion-supporting air quantity that air outlet slit is fed.
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 by multiple poor gas outlet flues, and combustion air exports and meager coal
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 exports and each
Section meager coal gas outlet sets flow regulator respectively.
The multistage combustion air exports and the number of fragments that multistage poor gas exports are identical or different.
Compared with prior art, the beneficial effects of the utility model are：
1) relative altitude of poor gas outlet at bottom, combustion air outlet at bottom and exhaust gas circulation hole, preheating are rationally set
When combustion air afterwards enters flue first mix with waste gas, reduce combustion air in oxygen concentration, then up spray and
Coal gas catalytic combustion, realize gently with depth hypoxemia dilute combustion so that NOx generation obtains in flue combustion process
Effectively suppress；
2) each section of combustion air exports and poor gas outlet setting are 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) gas volume that the outlet of final stage poor gas is fed in flue accounts for the 1~50% of total gas volume, ensures 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 described in the utility model for realizing low nitrogen oxide burning
Figure.
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 final stage combustion air exports 12. of air outlet slit 11. cross over the exhaust gas circulation hole of hole 13.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
A kind of coke oven combustion chamber flue structure of low nitrogen oxide burning described in the utility model, coke oven combustion chamber is by more
Individual flue 1 forms, and each two flue 1 forms a duplex flue, and the top of duplex flue across hole 12 by connecting
Logical, bottom is connected by exhaust gas circulation hole 13；It is each that the bottom of flue 1 sets rich gas brick gas passage 3 respectively, poor gas bottom goes out
Mouthfuls 5 and combustion air outlet at bottom 9, flue partition 2 is along height to setting multistage combustion air exports 10 and multistage poor gas exports
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；The absolute altitude of combustion air outlet at bottom 9
It 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；Each section in multistage combustion air exports
Combustion air exports 10 and the absolute altitude of each section of poor gas outlet 6 in the outlet of multistage poor gas differ, and final stage helps
Fire absolute altitude of the absolute altitude higher than final stage poor gas outlet 7 of air outlet slit 11；The coal gas that final stage poor gas outlet 7 is fed
Measure to feed the 1%~50% of coal gas total amount, the combustion-supporting air quantity that final stage combustion air exports 11 are fed is combustion-supporting to feed
The 1%~50% of 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 exports 10 connect flue 1, and meager coal air flue 4 connects flue 1, and combustion air by multiple poor gas outlet 6
Outlet 10 and poor gas outlet 6 are inclined upward, narrowed passage into flue 1.
The rich gas outlet of the rich gas brick gas passage 3, combustion air outlet at bottom 9, each section of combustion air exports 10
And flow regulator is set respectively at each section of poor gas outlet 6.
The multistage combustion air exports and the number of fragments that multistage poor gas exports are identical or different.
In the utility model, by being connected across hole 12, bottom passes through at the top of 2 flues 1 in duplex flue
Exhaust gas circulation hole 13 connects；The combustion air road 8 and meager coal air flue 4 mutually completely cut off is provided with flue partition 2, along vertical fire
Road 1 it is high to flue partition 2 on set multistage combustion air exports, multistage poor gas to export respectively；Poor gas outlet at bottom 5
It is arranged on the bottom of flue partition 2；Rich gas brick gas passage 1 is arranged on the flue partition 2 for not opening up exhaust gas circulation hole 13
Both sides.
The utility model is pointed to the combustion air outlet at bottom 9 of the bottom of flue 1 first and poor gas outlet at bottom 5 enters
Row rationally designs, that is, limit combustion air outlet at bottom 9 less than exhaust gas circulation hole 13 or with its contour arrangement, flue partition 2
The poor gas outlet at bottom 5 of bottom is higher than the bottom surface absolute altitude arrangement of exhaust gas circulation hole 13, so that the combustion air after preheating enters
First mixed during flue 1 with waste gas, reduce the concentration of oxygen in combustion air, then up injection and coal gas catalytic combustion, shape
Into gently 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 heated using poor gas or mixed gas, 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 is sprayed, and remaining combustion air is sprayed by each section of combustion air exports 10 on flue partition 2.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
Poor gas is sprayed by each section of poor gas outlet 6 on flue partition 2.In the utility model, the outlet 7 of final stage poor gas is total
It is less than final stage combustion air exports 11.
Each combustion air exports 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, it can also be calculated by analog simulation and determine that gas vent area of section is controlled to gas flow
System.In coke oven produces heating process, the coal gas and combustion-supporting air quantity respectively exported in flue 1 is adjusted, makes the sky of combustion process
Gas coefficient of excess always deviates 1, and the flame of epimere burning generation can be cooled by the coal gas of hypomere ejection or combustion air, with
This makes the NOx in flue combustion process obtain Comprehensive Control.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality
New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model
Within enclosing.
Claims (4)
1. a kind of coke oven combustion chamber flue structure of low nitrogen oxide burning, coke oven combustion chamber are made up of multiple flues, often
Two flues form a duplex flue, and by being connected across hole, bottom passes through waste gas circulation at the top of duplex flue
Hole connects；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 along high to setting multistage combustion air exports and multistage poor gas exports；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 exports and multistage in multistage combustion air exports are poor
The absolute altitude of each section of poor gas outlet in gas exit differs, and the absolute altitude of final stage combustion air exports is higher than last
The absolute altitude of one section of poor gas outlet.
A kind of 2. 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 passes through multiple combustion air exports
Flue is connected, meager coal air flue is by multiple poor gas outlet flues, and combustion air exports and poor gas outlet are equal
For inclined upward, narrowed passage into flue.
A kind of 3. 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 exports and each section of poor gas of the rich gas brick gas passage
Exit sets flow regulator respectively.
A kind of 4. coke oven combustion chamber flue structure of low nitrogen oxide burning according to claim 1, it is characterised in that
The multistage combustion air exports and the number of fragments that multistage poor gas exports are identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720715594.3U CN206887003U (en) | 2017-06-20 | 2017-06-20 | Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720715594.3U CN206887003U (en) | 2017-06-20 | 2017-06-20 | Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206887003U true CN206887003U (en) | 2018-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720715594.3U Withdrawn - After Issue CN206887003U (en) | 2017-06-20 | 2017-06-20 | Realize the coke oven combustion chamber flue structure of low nitrogen oxide burning |
Country Status (1)
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| CN (1) | CN206887003U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107033926A (en) * | 2017-06-20 | 2017-08-11 | 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 |
| CN108774537A (en) * | 2018-07-31 | 2018-11-09 | 中冶焦耐(大连)工程技术有限公司 | A kind of low-nitrogen discharged complex thermal coke heating system and its adjusting method |
-
2017
- 2017-06-20 CN CN201720715594.3U patent/CN206887003U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107033926A (en) * | 2017-06-20 | 2017-08-11 | 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 |
| CN107033926B (en) * | 2017-06-20 | 2019-08-27 | 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 |
| CN108774537A (en) * | 2018-07-31 | 2018-11-09 | 中冶焦耐(大连)工程技术有限公司 | A kind of low-nitrogen discharged complex thermal coke heating system and its adjusting method |
| CN108774537B (en) * | 2018-07-31 | 2023-08-25 | 中冶焦耐(大连)工程技术有限公司 | Low-nitrogen-emission reheating coke oven heating system and adjusting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180116 Effective date of abandoning: 20190827 |