CN106010587A - Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas - Google Patents
Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas Download PDFInfo
- Publication number
- CN106010587A CN106010587A CN201610579961.1A CN201610579961A CN106010587A CN 106010587 A CN106010587 A CN 106010587A CN 201610579961 A CN201610579961 A CN 201610579961A CN 106010587 A CN106010587 A CN 106010587A
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- waste gas
- coke oven
- supervisor
- gas supervisor
- flue duct
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
- C10B21/18—Recirculating the flue gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
- C10B21/10—Regulating and controlling the combustion
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to a coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas. A waste gas main pipe A and a waste gas main pipe B are embedded at the bottoms of the two sides of small coke oven flues, one end of the waste gas main pipe A and one end of the waste gas main pipe B are respectively connected with a total flue of the coke oven, and the other end of the waste gas main pipe A and the other end of the waste gas main pipe B are communicated with the small coke oven flues having different air flow directions respectively through cleaning holes. The small coke oven flue connected with the waste gas main pipe A/B is changed from lifting air flow to descending air flow, the small coke oven flue connected with the waste gas main pipe B/A is changed from descending air flow to lifting air flow; and at this time, high temperature waste gas is extracted from the total flue of the coke oven to enter the lifting air flow of the corresponding small coke oven flues through the waste gas main pipe B and the cleaning holes. According to the method, by extracting the flue waste gas in the total flue of the coke oven and mixing the flue waste gas into the lifting air flow heated by the coke oven, the burning intensity of gas can be reduced, and the goal of reducing the content of the nitrogen oxides in waste gas in the waste gas discharged out of the coke oven is achieved. A device adopted for the method is simple in structure, less in investment and convenient to adjust, and automatic control can be achieved.
Description
Technical field
The present invention relates to coke oven environmental technology field, particularly relate to a kind of coke oven heating reducing nitrogen oxides of exhaust gas concentration
Method.
Background technology
In process of production, the burning in coke oven combustion chamber of coal gas and air can produce nitrogen oxides (NO to coke ovenX).These contain
The waste gas of nitrogen oxides can be directly discharged in air by coke oven chimney, and the nitrogen oxides in air can damage the ozone layer, and makes
Become acid rain, pollute environment.Along with China's pay attention to day by day to environmental problem, to the discharge standard of nitrogen oxides in coke oven exhaust gas
Have also been made stricter regulation, but the nitrous oxides concentration of overwhelming majority coke oven discharge all exceeds standard at present.
The coke oven heating technology that can reduce nitrous oxides concentration at present mainly has two kinds, and the first carries out with waste gas circulation and divides
Duan Jiare etc. are main coke oven construction optimization design, although the method can be greatly reduced the concentration of nitrogen oxides in coke oven exhaust gas,
But it is existing to the discharge standard requirement of nitrogen oxides in coke oven exhaust gas to be not met by country；Its two be to discharge coke oven give up
Gas carries out denitration process, although this technology also can be greatly reduced the concentration of nitrogen oxides in coke oven exhaust gas, but its disadvantage is
Processing means investment is huge, take up an area more, operating cost is high, directly limit the universal of this technology and application.
Summary of the invention
The invention provides a kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration, in extraction coke oven main chimney flue
Stack gases is blended in the ascending air of coke oven heating, can reduce the combustion intensity of coal gas, and reduce row outside coke oven
The purpose of nitrogen oxides of exhaust gas content；Its apparatus structure used is simple, small investment, easy to adjust, and can realize automatically
Control.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration, comprises the steps:
1) burying waste gas supervisor A and waste gas supervisor B the most side by side underground at small flue duct of coke oven two side bottom, coke oven main chimney flue is leaning on
Nearly coke oven divides extraction waste gas header at flue point, and waste gas header connects waste gas supervisor A by waste gas connecting tube A, passes through
Waste gas connecting tube B connects waste gas supervisor B；Waste gas header is provided with high-temperature blower, and waste gas connecting tube A sets electric control valve
A, waste gas connecting tube B sets electric control valve B, high-temperature blower, electric control valve A and electric control valve B respectively with Jiao
Stove heating control system connects；
2), during coke oven heating system commutation, the small flue duct of coke oven of adjacent bottom of combustion chamber is respectively provided with down current or rising
Air-flow；Waste gas supervisor A is connected by the clean-out hatch bottom small flue duct of coke oven respectively with waste gas supervisor B has different airflow direction
Small flue duct of coke oven；
3) when being transferred to down current by ascending air in the small flue duct of coke oven that waste gas supervisor A connects, waste gas supervisor B connects
Small flue duct of coke oven in simultaneously transferred to ascending air by down current；Now heating control system of coke oven controls electric control valve A
Closing, electric control valve B opens, and high-temperature blower is responsible for B and clean-out hatch from coke oven main chimney flue extracting high-temperature waste gas by waste gas
Enter in the ascending air of corresponding small flue duct of coke oven；
4) when being transferred to ascending air by down current in the small flue duct of coke oven that waste gas supervisor A connects, waste gas supervisor B connects
Small flue duct of coke oven in simultaneously transferred to down current by ascending air；Now heating control system of coke oven controls electric control valve B
Closing, electric control valve A opens, and high-temperature blower is responsible for A and clean-out hatch from coke oven main chimney flue extracting high-temperature waste gas by waste gas
Enter in the ascending air of corresponding small flue duct of coke oven.
Along being longitudinally provided with multiple clean-out hatch bottom described small flue duct of coke oven, waste gas supervisor A and waste gas supervisor B passes through Y shape respectively
Ingress pipe connects the corresponding outermost clean-out hatch of small flue duct of coke oven.
It is respectively equipped with heat-insulation layer outside described waste gas supervisor A and waste gas supervisor B.
High-temperature compensator, waste gas supervisor A and the end of waste gas supervisor B it is respectively equipped with on described waste gas supervisor A and waste gas supervisor B
End is respectively equipped with pipeline voltage stabilizer.
Compared with prior art, the invention has the beneficial effects as follows:
1) the method for the invention can increase the waste gas circulation amount of coke oven, reduces combustion intensity, reduces nitrogen in coke oven exhaust gas
Oxide content；
2) apparatus structure used is simple, it is little to take up an area, small investment, easy to adjust, and can realize automatically controlling；
3) waste gas introduces from small flue duct of coke oven bottom purge hole, has lower end cleaning function to bottom flue simultaneously.
Accompanying drawing explanation
Fig. 1 is the operation principle schematic diagram of the coke oven heating method of reduction nitrous oxides concentration of the present invention.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 is small flue duct of coke oven arrangement schematic diagram.
In figure: 1. coke oven main chimney flue 2. high-temperature blower 3. electric control valve A 4. waste gas supervisor A 5. high-temperature compensator
6.Y type ingress pipe 7. pipeline voltage stabilizer 8. heating control system of coke oven 9. electric control valve B 10. waste gas supervisor B
11. coke ovens divide flue 12. small flue duct of coke oven 13. clean-out hatch 14. combustor 15. carbonization chamber 16. regenerator
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
As Figure 1-Figure 2, a kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration of the present invention, bag
Include following steps:
1) burying waste gas supervisor A 4 and waste gas supervisor B 10 the most side by side underground at 12 liang of side bottoms of small flue duct of coke oven, coke oven is total
Flue 1 is dividing extraction waste gas header at flue 11 point near coke oven, and waste gas header connects useless by waste gas connecting tube A
Gas supervisor A 4, connects waste gas supervisor B 10 by waste gas connecting tube B；Waste gas header is provided with high-temperature blower 2, and waste gas is even
Set electric control valve A 3 on adapter A, waste gas connecting tube B sets electric control valve B 9, high-temperature blower 2, motorized adjustment
Valve A 3 and electric control valve B 9 is connected with heating control system of coke oven 8 respectively；
2), during coke oven heating system commutation, the small flue duct of coke oven 12 bottom adjacent combustor 14 is respectively provided with down current
Or ascending air；Waste gas supervisor A 4 and waste gas supervisor B 10 is respectively by the clean-out hatch 13 bottom small flue duct of coke oven 12 even
The logical small flue duct of coke oven 12 with different airflow direction；
3) when the small flue duct of coke oven 12 that waste gas supervisor A 4 connects is transferred to down current by ascending air, waste gas supervisor B
10 small flue duct of coke ovens 12 connected are transferred to ascending air by down current simultaneously；Now heating control system of coke oven 8 controls
Electric control valve A 3 closes, and electric control valve B 9 opens, and high-temperature blower 2 leads to from coke oven main chimney flue 1 extracting high-temperature waste gas
Cross waste gas supervisor B 10 and clean-out hatch 13 enters in the ascending air of corresponding small flue duct of coke oven 12；
4) when being transferred to ascending air by down current in the small flue duct of coke oven 12 that waste gas supervisor A 4 connects, waste gas is responsible for
The small flue duct of coke oven 12 that B10 connects is transferred to down current by ascending air simultaneously；Now heating control system of coke oven 8 is controlled
Electric control valve B 9 processed closes, and electric control valve A 3 opens, and high-temperature blower 2 is from coke oven main chimney flue 1 extracting high-temperature waste gas
Entered by waste gas supervisor A 4 and clean-out hatch 13 in the ascending air of corresponding small flue duct of coke oven 12.
Along being longitudinally provided with multiple clean-out hatch 13 bottom described small flue duct of coke oven 12, waste gas supervisor A 4 and waste gas supervisor B 10
The corresponding outermost clean-out hatch of small flue duct of coke oven 12 13 is connected respectively by Y shape ingress pipe 6.
It is respectively equipped with heat-insulation layer outside described waste gas supervisor A 4 and waste gas supervisor B 10.
It is respectively equipped with high-temperature compensator 5, waste gas supervisor A 4 and waste gas on described waste gas supervisor A 4 and waste gas supervisor B 10
The end of supervisor B 10 is respectively equipped with pipeline voltage stabilizer 7.
As it is shown on figure 3, in coke oven heating system, combustor 14 and the alternate setting of carbonization chamber 15, burn and divide bottom room 14
Tong Guo not connect small flue duct of coke oven 12 in chute district, bottom small flue duct of coke oven 12, be provided with clean-out hatch 13.According to coke oven heating seasonal epidemic pathogens
Small flue duct of coke oven 12 is in turn divided into 1# bottom flue, 2# by the difference (ascending air or down current) of flow path direction in order
Bottom flue, 3# bottom flue ... 6# bottom flue (small flue duct of coke oven quantity does not limits, herein for illustrating).Such as air-flow in figure
Shown in direction, odd numbers bottom flue is ascending air, even numbers bottom flue is down current.
Being arranged in sequence with n in Fig. 1 altogether and arrange small flue duct of coke oven 12, wherein odd numbers bottom flue is respectively by outermost clean-out hatch
13 connect Y shape ingress pipe 6, then reconnect waste gas supervisor A 4, and even numbers bottom flue is respectively by outermost clean-out hatch 13
Connect Y shape ingress pipe 6, then reconnect waste gas supervisor B 10.
Realized the automatic start-stop of high-temperature blower 2 by heating control system of coke oven 8, and realize electric control valve A 3 with electronic
Regulation valve B 9 and the interlocked control of heating system reversing arrangement, make waste gas import participation combustion chambers burn in ascending air all the time,
High-temperature blower 2 is adjustable speed fan, by speed regulating control waste gas import volume.In above work process, filled by high temperature compensation
Put 5 and pipeline voltage stabilizer 7 ensure that security of system stable operation, high temperature compensation device 5 can use high-temperature expansion joint.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, and appoints
What those familiar with the art is in the technical scope that the invention discloses, according to technical scheme and send out
Bright design equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (4)
1. the coke oven heating method that can reduce nitrogen oxides of exhaust gas concentration, it is characterised in that comprise the steps:
1) burying waste gas supervisor A and waste gas supervisor B the most side by side underground at small flue duct of coke oven two side bottom, coke oven main chimney flue is leaning on
Nearly coke oven divides extraction waste gas header at flue point, and waste gas header connects waste gas supervisor A by waste gas connecting tube A, passes through
Waste gas connecting tube B connects waste gas supervisor B；Waste gas header is provided with high-temperature blower, and waste gas connecting tube A sets electric control valve
A, waste gas connecting tube B sets electric control valve B, high-temperature blower, electric control valve A and electric control valve B respectively with Jiao
Stove heating control system connects；
2), during coke oven heating system commutation, the small flue duct of coke oven of adjacent bottom of combustion chamber is respectively provided with down current or rising
Air-flow；Waste gas supervisor A is connected by the clean-out hatch bottom small flue duct of coke oven respectively with waste gas supervisor B has different airflow direction
Bottom flue；
3) when being transferred to down current by ascending air in the small flue duct of coke oven that waste gas supervisor A connects, waste gas supervisor B connects
Small flue duct of coke oven in simultaneously transferred to ascending air by down current；Now heating control system of coke oven controls electric control valve A
Closing, electric control valve B opens, and high-temperature blower is responsible for B and clean-out hatch from coke oven main chimney flue extracting high-temperature waste gas by waste gas
Enter in the ascending air of corresponding small flue duct of coke oven；
4) when being transferred to ascending air by down current in the small flue duct of coke oven that waste gas supervisor A connects, waste gas supervisor B connects
Small flue duct of coke oven in simultaneously transferred to down current by ascending air；Now heating control system of coke oven controls electric control valve B
Closing, electric control valve A opens, and high-temperature blower is responsible for A and clean-out hatch from coke oven main chimney flue extracting high-temperature waste gas by waste gas
Enter in the ascending air of corresponding small flue duct of coke oven.
A kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration the most according to claim 1, its feature
Being, along being longitudinally provided with multiple clean-out hatch bottom described small flue duct of coke oven, waste gas supervisor A and waste gas supervisor B passes through Y respectively
Shape ingress pipe connects the corresponding outermost clean-out hatch of small flue duct of coke oven.
A kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration the most according to claim 1, its feature
It is, outside described waste gas supervisor A and waste gas supervisor B, is respectively equipped with heat-insulation layer.
A kind of coke oven heating method reducing nitrogen oxides of exhaust gas concentration the most according to claim 1, its feature
It is, described waste gas supervisor A and waste gas supervisor B is respectively equipped with high-temperature compensator, waste gas supervisor A and waste gas supervisor B
End is respectively equipped with pipeline voltage stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610579961.1A CN106010587A (en) | 2016-07-21 | 2016-07-21 | Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610579961.1A CN106010587A (en) | 2016-07-21 | 2016-07-21 | Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas |
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| CN106010587A true CN106010587A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610579961.1A Pending CN106010587A (en) | 2016-07-21 | 2016-07-21 | Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas |
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Cited By (3)
| 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 |
| CN109307435A (en) * | 2018-10-31 | 2019-02-05 | 中冶焦耐(大连)工程技术有限公司 | A kind of flue gases of cock oven time match system and method |
| CN110283603A (en) * | 2019-06-11 | 2019-09-27 | 安阳钢铁股份有限公司 | A kind ofization producing exhaust gas and spray into lower regulatable coke oven burning new process |
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| JP2863608B2 (en) * | 1990-07-31 | 1999-03-03 | 川崎製鉄株式会社 | How to raise the temperature of the coke oven |
| CN105199749A (en) * | 2015-11-03 | 2015-12-30 | 济南弘科信泰环保技术有限公司 | NOx control method and device for coke oven stack gas |
| CN205077002U (en) * | 2015-11-03 | 2016-03-09 | 济南弘科信泰环保技术有限公司 | Coke oven chimney waste gas nitrogen oxide controlling means |
| CN105385460A (en) * | 2015-12-02 | 2016-03-09 | 中冶焦耐工程技术有限公司 | Circulating structure and method for exhaust gas of coke oven |
| CN105670650A (en) * | 2016-01-21 | 2016-06-15 | 金能科技股份有限公司 | Device and method for reducing nitrogen oxide generated by coke oven |
-
2016
- 2016-07-21 CN CN201610579961.1A patent/CN106010587A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2863608B2 (en) * | 1990-07-31 | 1999-03-03 | 川崎製鉄株式会社 | How to raise the temperature of the coke oven |
| CN105199749A (en) * | 2015-11-03 | 2015-12-30 | 济南弘科信泰环保技术有限公司 | NOx control method and device for coke oven stack gas |
| CN205077002U (en) * | 2015-11-03 | 2016-03-09 | 济南弘科信泰环保技术有限公司 | Coke oven chimney waste gas nitrogen oxide controlling means |
| CN105385460A (en) * | 2015-12-02 | 2016-03-09 | 中冶焦耐工程技术有限公司 | Circulating structure and method for exhaust gas of coke oven |
| CN105670650A (en) * | 2016-01-21 | 2016-06-15 | 金能科技股份有限公司 | Device and method for reducing nitrogen oxide generated by coke oven |
Cited By (4)
| 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 |
| CN109307435A (en) * | 2018-10-31 | 2019-02-05 | 中冶焦耐(大连)工程技术有限公司 | A kind of flue gases of cock oven time match system and method |
| CN109307435B (en) * | 2018-10-31 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | Coke oven flue gas back-mixing system and method |
| CN110283603A (en) * | 2019-06-11 | 2019-09-27 | 安阳钢铁股份有限公司 | A kind ofization producing exhaust gas and spray into lower regulatable coke oven burning new process |
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Application publication date: 20161012 |
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