CN208952122U - A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation - Google Patents
A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation Download PDFInfo
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- CN208952122U CN208952122U CN201821515872.1U CN201821515872U CN208952122U CN 208952122 U CN208952122 U CN 208952122U CN 201821515872 U CN201821515872 U CN 201821515872U CN 208952122 U CN208952122 U CN 208952122U
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Abstract
The utility model discloses a kind of devices by the nitrogen oxides in waste gas circulation reduction flue gases of cock oven, including PLC control panel, PLC control panel is separately connected two industrial personal computers, the single hot coke oven external circulating system of two industrial personal computers difference and re-heat coke oven external circulating system, single hot single hot coke oven of coke oven external circulating system connection, re-heat coke oven external circulating system connect re-heat coke oven；Unit is mixed by the first exhaust gas and the second exhaust gas is mixed into unit and is respectively single hot coke oven and re-heat coke oven offer air and mixes with coke oven exhaust gas, and adjusts mixing ratio by adjusting flashboard aperture, coke oven combustion point flame central temperature can be reduced, to control NOXProduction quantity, realize low nitrogen burning.
Description
[technical field]
The utility model belongs to coking industry tail gas clean-up technical field, more particularly to a kind of burnt by waste gas circulation reduction
The device of nitrogen oxides in furnace flue gas.
[background technique]
Coke-stove gas can generate nitrogen oxides (NO in coke oven combustion Indoor Combustionx), NOxTypically refer to the mixed of NO and NO2
Object is closed, nitrogen oxides, which is discharged into atmosphere, can destroy ozone layer, cause acid rain, pollute environment.80 generation of last century mid-term, developed country is just
Pernicious gas is regarded it as, control discharge standard is proposed.With the rapid development of our country's economy, to coke oven discharge nitrogen oxides
Also pay attention to day by day is endangered, and has worked out emission control standard.Currently, China coke oven chimney gas NOxThe discharge standard of execution is limit
Value 500mg/Nm3, " especially regional " coke oven chimney gas NOxDischarge standard is limit value 150mg/m3, but 5.5 meters of coke oven chimney gas NOx
For discharge amount (when full production) mostly in 1000mg/Nm or more, it is higher that excess load produces Shi Zehui.
Existing coke oven chimney gas NOxControl technology is divided into control technology and burning post-control technology before burning.Common burning
Post-control technology can be divided into three classes substantially, first is that catalytic reduction method, second is that advanced oxidation processes, third is that active carbon adsorption, but
All there is the problems such as processing unit investment is huge, and operating cost is high.Control technology is also referred to as watershed management technology before burning, and wraps
Exhaust gas outer circulation, segmentally heating, dilution coal gas or air etc. are included, has been widely applied, its main feature is that small investment, running cost
With low.In addition to exhaust gas outside circulation, other technologies are required in the ready made arrangement of Coke-oven Design stage, for coke oven of having gone into operation,
So far lack effective method or apparatus, with the continuous improvement of environmental requirement, oneself, which becomes, restricts coal chemical enterprise survival and development
An important factor for.
[utility model content]
The purpose of the utility model is to provide a kind of dresses by the nitrogen oxides in waste gas circulation reduction flue gases of cock oven
It sets, to solve the problems, such as that amount of nitrogen oxides is high in flue gas.
The utility model uses following technical scheme: a kind of nitrogen oxides reduced in flue gases of cock oven by waste gas circulation
Device, including PLC control panel, PLC control panel is separately connected two industrial personal computers, the single hot coke oven outer circulations respectively of two industrial personal computers
System and re-heat coke oven external circulating system, single hot single hot coke oven of coke oven external circulating system connection, re-heat coke oven external circulating system connect
Connect re-heat coke oven；
Single hot coke oven external circulating system includes that the exhaust gas being connected with single hot coke oven exhaust gas outlet conduit draws unit, and exhaust gas draws
Unit connects exhaust gas supply unit by its outlet conduit out, is also connected with the first exhaust gas on the outlet conduit of exhaust gas extraction unit
It is mixed into unit；First exhaust gas is mixed into unit for introducing outside air and conveying jointly by exhaust gas supply unit with coke oven exhaust gas
The nitrogen oxidation in exhaust gas is reduced to the coke side entrance and pusher side entrance of single hot coke oven to reduce the ignition temperature in single hot coke oven
Object content；
Re-heat coke oven external circulating system includes that the exhaust gas being connected with re-heat coke oven exhaust gas outlet conduit draws unit, and exhaust gas draws
Unit connects exhaust gas supply unit by its outlet conduit out, is also connected with the second exhaust gas on the outlet conduit of exhaust gas extraction unit
It is mixed into unit；Second exhaust gas is mixed into unit for introducing outside air and conveying jointly by exhaust gas supply unit with coke oven exhaust gas
The nitrogen oxidation in exhaust gas is reduced to the coke side entrance and pusher side entrance of re-heat coke oven to reduce the ignition temperature in re-heat coke oven
Object content.
Further, it includes drawing with what the waste gas outlet pipeline of single hot coke oven/re-heat coke oven was connected that exhaust gas, which draws unit,
Fan inlet pipeline, the other end of air-introduced machine inlet pipeline connect air-introduced machine, are also equipped with gate valve on air-introduced machine inlet pipeline, draw
Blower is connected to exhaust gas supply unit by air-introduced machine outlet conduit, and air-introduced machine outlet conduit is additionally coupled to the first exhaust gas and is mixed into list
Member/the second exhaust gas is mixed into unit.
Further, exhaust gas supply unit includes two automatic transfer valves being connected with air-introduced machine outlet conduit, and two certainly
Dynamic switching valve passes through the coke side entrance and pusher side entrance that exhaust gas disc is connected to single hot coke oven/re-heat coke oven respectively.
Further, it includes the first mixed wind input channel being connected with air-introduced machine outlet conduit that the first exhaust gas, which is mixed into unit,
Autocontrol valve is also equipped on first mixed wind input channel, the first mixed wind input channel other end connects manual modulation valve, hand
Dynamic regulating valve connects mixed wind nozzle by hose, and mixed wind nozzle connects waste gas valve by pipeline.
Further, it includes the second mixed wind input channel being connected with air-introduced machine outlet conduit that the second exhaust gas, which is mixed into unit,
Autocontrol valve is also equipped on second mixed wind input channel, the second mixed wind input channel other end connects manual modulation valve, hand
Dynamic regulating valve is connected to plunger valve by pipeline, and plunger valve is separately connected two mixed wind nozzles by hose, each mixed wind nozzle
Same waste gas valve is connected to by pipeline.
Further, each automatic transfer valve, air-introduced machine, autocontrol valve are connected with corresponding industrial personal computer respectively.
The beneficial effects of the utility model are: unit is mixed by the first exhaust gas and the second exhaust gas to be mixed into unit be respectively single
Hot coke oven and re-heat coke oven provide air and simultaneously mixs with coke oven exhaust gas, and adjust mixing ratio by adjusting flashboard aperture, can be with
Coke oven combustion point flame central temperature is reduced, to control NOXProduction quantity, realize low nitrogen burning.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of the utility model.
Wherein: 1.PLC control panel；2. industrial personal computer；3. re-heat coke oven；4. single hot coke oven；5. air-introduced machine inlet pipeline；6. lock
Valve；7. air-introduced machine；8. air-introduced machine outlet conduit；9. automatic transfer valve；10. exhaust gas disc；11. manual modulation valve；12. mixed wind spray
Mouth；13. shutter；14. autocontrol valve；31. the second mixed wind input channel；32. plunger valve；41. the first mixed wind input channel.
[specific embodiment]
The utility model is described in detail with reference to the accompanying drawings and detailed description.
The utility model discloses a kind of devices by the nitrogen oxides in waste gas circulation reduction flue gases of cock oven, such as scheme
Shown in 1, including PLC control panel 1, PLC control panel 1 are separately connected two industrial personal computers 2, and two industrial personal computers 2 are respectively outside single hot coke oven
The circulatory system and re-heat coke oven external circulating system, single hot single hot coke oven 4 of coke oven external circulating system connection, re-heat coke oven outer circulation system
System connection re-heat coke oven 3.Each operation of single hot coke oven 4 or re-heat coke oven 3 can be controlled by corresponding industrial personal computer 2, it is real
Now automatically control, it is simple to operate.PLC control panel 1 and two industrial personal computers 2 form robot control system(RCS), the master control list of robot control system(RCS)
Member uses SIEMENS PLC (S7-300) system, and 1/0 point contracting amount is no less than 15%, has high reliability.Under nominal situation,
It is run by lC system Automatic Control, industrial personal computer is mainly used for human-computer dialogue, data record facies analysis, and industrial personal computer has hot standby function
Can, when an industrial personal computer breaks down, another industrial personal computer is automatically into working condition.
Single hot coke oven external circulating system includes that the exhaust gas being connected with single hot 4 waste gas outlet pipeline of coke oven draws unit.Exhaust gas
It draws unit to be mainly used for introducing the exhaust gas in coke oven in single hot coke oven external circulating system comprising multiple with single hot coke oven 4/
The other end of the air-introduced machine inlet pipeline 5 that the waste gas outlet pipeline of hot coke oven 3 is connected, air-introduced machine inlet pipeline 5 connects air inducing
Machine 7, by air-introduced machine 7 be pipeline pressurize, by exhaust piping a part of exhaust gas introduce coke oven external circulating system, air-introduced machine into
Gate valve 6 is also equipped on mouth pipeline 5, air-introduced machine 7 is connected to exhaust gas supply unit by air-introduced machine outlet conduit 8, and air-introduced machine goes out
Mouthful pipeline 8 is additionally coupled to the first exhaust gas and is mixed into unit/second exhaust gas to be mixed into unit.
Using 5.5 meters of 65 hole coke oven -15 in the present embodiment, device allows to be mixed into about 4.5 ten thousand friendship/h, 300 DEG C of high temperature
Exhaust gas.The selection water-cooled resisting blower of air-introduced machine 7,132KW frequency conversion explosion proof motor, nominal air delivery 50,000 m3/h, total pressure 6KPa,
Flow passage part (including shell, impeller etc.) 304 stainless steels match SKF bearing, and blower excessively stream part is INSULATION DESIGN.Air-introduced machine into
Mouth pipeline 5 is made of spiral welded pipe, and is directly connect with coke shield main chimney flue.Air-introduced machine outlet conduit 8 uses spiral welding control
Make, is extended to before the automatic transfer valve 9 of machine coke two sides from the outlet of air-introduced machine 7.It adversely affects, draws for trouble saving state
7 front and back connecting pipe of blower sets circulating line and circulation valve.
Exhaust gas draws unit and connects exhaust gas supply unit by its outlet conduit, and exhaust gas supply unit includes going out with air-introduced machine
Two connected automatic transfer valves 9 of mouth pipeline 8, two automatic transfer valves 9 are connected to single hot coke oven 4/ by exhaust gas disc 10 respectively
The coke side combustion gas entrance and pusher side combustion gas entrance of re-heat coke oven 3.
The first exhaust gas, which is also connected with, on the outlet conduit of exhaust gas extraction unit is mixed into unit；First exhaust gas is mixed into unit and is used for
It introduces outside air and is delivered to singly the coke side entrance of hot coke oven 4 and pusher side jointly with coke oven exhaust gas by exhaust gas supply unit
Mouthful, to reduce the ignition temperature in single hot coke oven 4, reduce the amount of nitrogen oxides in exhaust gas.
It includes the first mixed wind input channel 41 being connected with air-introduced machine outlet conduit 8 that first exhaust gas, which is mixed into unit, and first is mixed
Autocontrol valve 14 is also equipped on wind input channel, first mixed 41 other end of wind input channel connects manual modulation valve 11, hand
Dynamic regulating valve 11 connects mixed wind nozzle 12 by hose, mixes wind nozzle 12 by pipeline and connects waste gas valve 13.It automatically controls
Valve 14 is adopted between river between high-temperature hard sealing rule, and takes side with coke shield reversing machine, realizes that exhaust gas is mixed into the synchronism switching with air dampers,
Adjust automatically branch pipe pressure balance.Whole higher in bottom temperature, rule of thumb, wind cooling temperature lowering dress is matched by all executing agencies herein
It sets.
Re-heat coke oven external circulating system includes that the exhaust gas being connected with 3 waste gas outlet pipeline of re-heat coke oven draws unit, exhaust gas
It draws unit and exhaust gas supply unit is connected by its outlet conduit, it is useless to be also connected with second on the outlet conduit of exhaust gas extraction unit
Gas is mixed into unit；Second exhaust gas be mixed into unit for introduce outside air and by exhaust gas supply unit and coke oven exhaust gas it is jointly defeated
It send to the coke side entrance of re-heat coke oven 3 and pusher side entrance, to reduce the ignition temperature in re-heat coke oven 3, reduces the nitrogen in exhaust gas
Oxide content.
It includes the second mixed wind input channel 31 being connected with air-introduced machine outlet conduit 8 that second exhaust gas, which is mixed into unit, and second is mixed
Autocontrol valve 14 is also equipped on wind input channel 31, second mixed 31 other end of wind input channel connects manual modulation valve 11,
Manual modulation valve 11 is connected to plunger valve 32 by pipeline, and plunger valve 32 is separately connected two mixed wind nozzles 12 by hose, often
A mixed wind nozzle 12 is connected to same waste gas valve 13 by pipeline.Manual modulation valve 11 for adjust be mixed into exhausted air quantity,
Metal hose can offset positional shift caused by pipeline expands with heat and contract with cold.Draw to 32 spool top of plunger valve connection blast furnace gas exhaust gas
Bar realizes the synchronous exchange with coke-stove gas exhaust gas switch.
Above-mentioned each automatic transfer valve 9, air-introduced machine 7, autocontrol valve 14 are connected with corresponding industrial personal computer 2 respectively, with
Realize automatic manipulation, industrial automation.
As coke oven NOxThe WX equipment series of control technology are mature before burning, and the utility model is in the prior art
Upper process is continuously improved, it is therefore an objective to meet current environmental requirement (coke oven chimney gas NOxDischarge capacity reaches 500mg/Nm3Environmentally friendly limit value
While below), considerable economic benefit is brought for enterprise.
Nitrogen oxides formation mechenism in coke oven chimney gas can be attributed to 2 big types substantially: first is that temperature thermal NOx,
N i.e. in air2And O2Reaction generates NO at high temperaturex；Second is that the type of Components Fuel containing N NOx, i.e., group containing N in coal gas
The NO that part burning is formedxA large amount of basic research prove, for most coke ovens, temperature thermal NOxTo NOx in chimney gas
95% or more contribution rate, as long as therefore by first kind NOxControl is in proper level, so that it may efficiently control in chimney gas
NOxContent.
By carrying out lot of experiments to the nitrogen oxides formation mechenism in the burnt shield chimney gas of collection, using coke-stove gas plus
Heat, NO when burning point temperature is higher than 1750 DEG C, in chimney exhaust gasxContent will double in geometric progression, and vice versa, pass through this
Chimney exhaust gas can be directly blown into air door by the device of utility model, and dilution combustion air slows down partial combustion intensity, be reduced
Burning point temperature, eliminates NOxFormation condition, thus reach control chimney gas NOxThe purpose of discharge amount.
The utility model reduces cigarette by being mixed and burned with burning gases more particularly to being recycled flue gas
NO in road gasx, by using the device of the utility model, coke oven height is obviously improved that (flue mark temperature can reduce 20- to heating
50 DEG C), coke cutting, green coke phenomenon greatly improve, and coke quality significantly improves；Jia Men is plucked in coke pushing and coke-pushing process ditch between fields dirt obviously subtracts
Small, environment protecting is obviously improved；Firing tunnel in coking furnace consumption can reduce by 2.5~4%；Coke pushing current is substantially reduced, carbonizing chamber lower part
Scratch significantly reduces, and improves converter life；Chimney exhaust gas total amount decreases, and temperature is risen.
Claims (6)
1. a kind of device for reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation, which is characterized in that controlled including PLC
Plate (1), the PLC control panel (1) are separately connected two industrial personal computers (2), and single hot coke oven follows two industrial personal computers (2) outside respectively
Loop system and re-heat coke oven external circulating system, the hot single hot coke oven (4) of coke oven external circulating system connection of list, the re-heat coke oven
External circulating system connects re-heat coke oven (3)；
The hot coke oven external circulating system of list includes that the exhaust gas being connected with single hot coke oven (4) waste gas outlet pipeline draws unit, institute
It states exhaust gas extraction unit and exhaust gas supply unit is connected by its outlet conduit, also connect on the outlet conduit of the exhaust gas extraction unit
It is connected to the first exhaust gas and is mixed into unit；First exhaust gas be mixed into unit for introduce outside air and by exhaust gas supply unit with
Coke oven exhaust gas is delivered to the coke side entrance and pusher side entrance of single hot coke oven (4) jointly, to reduce the burning temperature in single hot coke oven (4)
Degree reduces the amount of nitrogen oxides in exhaust gas；
The re-heat coke oven external circulating system includes that the exhaust gas being connected with re-heat coke oven (3) waste gas outlet pipeline draws unit, institute
It states exhaust gas extraction unit and exhaust gas supply unit is connected by its outlet conduit, also connect on the outlet conduit of the exhaust gas extraction unit
It is connected to the second exhaust gas and is mixed into unit；Second exhaust gas be mixed into unit for introduce outside air and by exhaust gas supply unit with
Coke oven exhaust gas is delivered to the coke side entrance and pusher side entrance of re-heat coke oven (3) jointly, to reduce the burning temperature in re-heat coke oven (3)
Degree reduces the amount of nitrogen oxides in exhaust gas.
2. a kind of device for reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation as described in claim 1, special
Sign is that it includes drawing with what the waste gas outlet pipeline of single hot coke oven (4)/re-heat coke oven (3) was connected that the exhaust gas, which draws unit,
The other end of fan inlet pipeline (5), the air-introduced machine inlet pipeline (5) connects air-introduced machine (7), the air-introduced machine inlet pipeline
(5) it is also equipped on gate valve (6), the air-introduced machine (7) is connected to exhaust gas supply unit, institute by air-introduced machine outlet conduit (8)
Air-introduced machine outlet conduit (8) is stated to be additionally coupled to the first exhaust gas and be mixed into unit/second exhaust gas to be mixed into unit.
3. a kind of device for reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation as claimed in claim 2, special
Sign is that the exhaust gas supply unit includes two automatic transfer valves (9) being connected with air-introduced machine outlet conduit (8), two institutes
State coke side entrance and machine that automatic transfer valve (9) is connected to single hot coke oven (4)/re-heat coke oven (3) by exhaust gas disc (10) respectively
Side entrance.
4. a kind of device for reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation as claimed in claim 3, special
Sign is that it includes the first mixed wind input channel (41) being connected with air-introduced machine outlet conduit (8) that first exhaust gas, which is mixed into unit,
It is also equipped with autocontrol valve (14) on the first mixed wind input channel, first mixed wind input channel (41) other end connects
It connects manual modulation valve (11), the manual modulation valve (11) connects mixed wind nozzle (12), the mixed wind nozzle (12) by hose
Waste gas valve (13) are connected by pipeline.
5. a kind of device for reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation as claimed in claim 3, special
Sign is that it includes the second mixed wind input channel (31) being connected with air-introduced machine outlet conduit (8) that second exhaust gas, which is mixed into unit,
It is also equipped with autocontrol valve (14) on the second mixed wind input channel (31), the second mixed wind input channel (31) is another
End connection manual modulation valve (11), the manual modulation valve (11) are connected to plunger valve (32), the plunger valve by pipeline
(32) two mixed wind nozzles (12) are separately connected by hose, each mixed wind nozzle (12) is connected to by pipeline same
Waste gas valve (13).
6. a kind of device that the nitrogen oxides in flue gases of cock oven is reduced by waste gas circulation as described in claim 4 or 5,
Be characterized in that, each automatic transfer valve (9), air-introduced machine (7), autocontrol valve (14) respectively with corresponding industrial personal computer (2)
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821515872.1U CN208952122U (en) | 2018-09-17 | 2018-09-17 | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821515872.1U CN208952122U (en) | 2018-09-17 | 2018-09-17 | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation |
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| CN208952122U true CN208952122U (en) | 2019-06-07 |
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| CN201821515872.1U Active CN208952122U (en) | 2018-09-17 | 2018-09-17 | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916888A (en) * | 2018-09-17 | 2018-11-30 | 陕西黑猫焦化股份有限公司 | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation |
-
2018
- 2018-09-17 CN CN201821515872.1U patent/CN208952122U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916888A (en) * | 2018-09-17 | 2018-11-30 | 陕西黑猫焦化股份有限公司 | A kind of device reducing the nitrogen oxides in flue gases of cock oven by waste gas circulation |
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