CN105199749A - NOx control method and device for coke oven stack gas - Google Patents
NOx control method and device for coke oven stack gas Download PDFInfo
- Publication number
- CN105199749A CN105199749A CN201510737956.4A CN201510737956A CN105199749A CN 105199749 A CN105199749 A CN 105199749A CN 201510737956 A CN201510737956 A CN 201510737956A CN 105199749 A CN105199749 A CN 105199749A
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- coke oven
- waste gas
- gas
- stack gas
- breeches pipe
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- 239000000571 coke Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 239000002912 waste gas Substances 0.000 claims description 57
- 239000007789 gas Substances 0.000 claims description 45
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 33
- 230000007306 turnover Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 7
- 238000010790 dilution Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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- Coke Industry (AREA)
Abstract
The invention relates to the technical field of coke oven equipment upgrading, in particular to a NOx control method and device for coke oven stack gas. The device comprises a stack gas main pipe communicated with a main chimney flue of a coke oven and stack gas blowing-in mechanisms arranged above dampers of coke oven stack gas shutters, wherein an induced draft fan is arranged between the stack gas main pipe and the main chimney flue of the coke oven; each stack gas blowing-in mechanism adopts a three-way turn plate switching mechanism, one channel of the mechanism is communicated with the stack gas main pipe, the other two channels are formed above the dampers of two adjacent coke oven stack gas shutters, and the stack gas blowing in direction can be changed through switching of turn plates. According to the NOx control method and device for the coke oven stack gas, the conventional coke oven production equipment is improved, so that the content of emitted NOx is controlled effectively with an air depletion method.
Description
Technical field
The present invention relates to coke oven for iron renovation technique field, particularly a kind of coke oven stack gas oxynitride control method and device.
Background technology
Coke-oven gas can produce oxynitride (NOx) when coke oven combustion chamber burns, oxynitride refers to the mixture of NO and NO2 usually, and the oxynitride in air damages the ozone layer, and causes acid rain, contaminate environment.In mid-term in generation last century 80, developed country just regards it as obnoxious flavour, proposes control discharge standard.Current developed country control criterion is oxynitride (O in waste gas substantially
2content conversion to 5% time), with coke-oven gas heating mass concentration be not more than 500mg/m in NOx
3, be not more than 350mg/m by the mass concentration that dilution coal gas (mixed gas) heats
3(170ppm).
Along with the fast development of China's economy, to the harm also pay attention to day by day of coke oven discharge oxynitride, and work out emission control standard.At present, the emission standard that China coke oven chimney gas NOx performs is limit value 500mg/m3, " especially area " coke oven chimney gas NOx emission standard is limit value 150mg/m3, but majority is with coke oven, especially a large amount of 5.5 meters and above coke oven, its chimney gas NOx discharge is general all between 600 ~ 1800mg/m3.
Existing coke oven chimney gas NOx control techniques is divided into control techniques and burning post-control technology in burning.
Burning post-control technology, the general catalytic decomposition technology that adopts carries out disaggregating treatment to the NOx in coke oven stack gas, and the investment of its treatment unit is huge, and working cost is high.
In burning, control techniques comprises waste gas circulation, zone heating etc., but all need the ready made arrangement when Coke-oven Design, for coke oven of going into operation, but there is no highly effective control method, along with improving constantly of environmental requirement, become the important factor of restriction coal chemical enterprise survival and development.
Summary of the invention
In order to solve the problem of prior art, the invention provides a kind of coke oven stack gas oxynitride control method and device, it improves existing coke oven production unit, utilizes the method for dilution air, control effectively to the amount of nitrogen oxides of stack gas.
The technical solution adopted in the present invention is as follows:
A kind of coke oven stack gas oxynitride control method, comprising:
A, above coke oven exhaust gas shutter, lay waste gas supervisor, utilize induced draft fan to be drawn by the waste gas in coke oven main flue, and send into waste gas supervisor;
B, multiple waste gas is set is blown into mechanism in waste gas supervisor below, waste gas is blown into mechanism and comprises three-way body, waste gas described in the communication of the upper end supervisor of described three-way body, described three-way body arranges symmetrical left breeches pipe and right breeches pipe downwards respectively, described left breeches pipe and right breeches pipe junction are provided with exchange turnover panel, described exchange turnover panel is externally connected to rocking arm, and described rocking arm is linked by the exchange tie rod of pull bar and coke oven;
The exchange tie rod of C, coke oven is when pulling waste gas valve air door, pull described exchange turnover panel simultaneously, make the breeches pipe corresponding with the air door opened connect all the time, and side breeches pipe is closed in addition, thus be blown into waste gas while realizing sucking air, realize the object of air dilution.
By regulating the adjustable exhausted air quantity being blown into air door of induced draft fan rotating speed, thus reach the object regulating amount of nitrogen oxides in coke oven chimney.
Arrange oxynitride on-line measuring device, chimney gas oxynitride is carried out on-line checkingi, the amount of nitrogen oxides signal access control system of detection, can control induced draft fan rotating speed automatically, thus realizes the object automatically regulating coke oven chimney gas amount of nitrogen oxides.
A kind of coke oven stack gas oxynitride control device, the waste gas supervisor and the waste gas be arranged at above coke oven exhaust gas shutter air door that comprise connection coke oven main flue are blown into mechanism, it is characterized in that, induced draft fan is provided with between described waste gas supervisor and coke oven main flue, it is three-port structure that described waste gas is blown into mechanism, waste gas supervisor described in its path one end is communicated with, two ends path lays respectively at above the air door of two adjacent coke oven exhaust gas shutters in addition.
Waste gas is blown into mechanism and comprises three-way body, waste gas described in the communication of the upper end supervisor of described three-way body, described three-way body arranges symmetrical left breeches pipe and right breeches pipe downwards respectively, described left breeches pipe and right breeches pipe junction are provided with exchange turnover panel, described exchange turnover panel is externally connected to rocking arm, and described rocking arm is linked by the exchange tie rod of pull bar and coke oven.
The beneficial effect that technical scheme provided by the invention is brought is:
A kind of coke oven stack gas oxynitride control method of the present invention and device, it had both been applicable to newly-built coke oven and has also been applicable to have gone into operation during the chimney gas NOx of coke oven burns and controls, device of the present invention is directly from coke oven main flue extracting high-temperature waste gas (about 300 ~ 320 DEG C), and be directly blown into from waste gas valve air door, control chimney NOx content by the method for dilution air.
A kind of coke oven stack gas oxynitride control method of the present invention and device are tried out, before coming into operation on the coke oven of 5.5 meters, 2x55 hole: chimney NOx content 600 ~ 800mg/m
3between, after coming into operation: when the waste gas amount of being blown into reaches 10% of air capacity, chimney NOx content can be down to 260 ~ 300mg/m
3between, current environment protection emission requirement can be met.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the apparatus structure schematic diagram of a kind of coke oven stack gas oxynitride control method of the present invention and device;
Fig. 2 is the structural front view that the waste gas of a kind of coke oven stack gas oxynitride control method of the present invention and device is blown into mechanism;
Fig. 3 is the structure side view that the waste gas of a kind of coke oven stack gas oxynitride control method of the present invention and device is blown into mechanism.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
A kind of coke oven stack gas of the present embodiment oxynitride control method, comprising:
A, above coke oven exhaust gas shutter, lay waste gas supervisor, utilize induced draft fan to be drawn by the waste gas in coke oven main flue, and send into waste gas supervisor;
B, multiple waste gas is set is blown into mechanism in waste gas supervisor below, waste gas is blown into mechanism and comprises three-way body, waste gas described in the communication of the upper end supervisor of described three-way body, described three-way body arranges symmetrical left breeches pipe and right breeches pipe downwards respectively, described left breeches pipe and right breeches pipe junction are provided with exchange turnover panel, described exchange turnover panel is externally connected to rocking arm, and exchanges tie rod interlock with coke oven;
C, coke oven exchange tie rod when pulling waste gas valve air door, pull affiliated exchange turnover panel simultaneously, make the breeches pipe corresponding with the air door opened connect all the time, and side breeches pipe is closed in addition, thus be blown into waste gas while realizing sucking air, realize the object of air dilution.
In the present embodiment, by regulating the waste gas straying quatity of induced draft fan speed adjustment coke oven exhaust gas shutter air door, thus the object regulating amount of nitrogen oxides in coke oven chimney can be reached.
Embodiment two:
The difference of the present embodiment and embodiment one is, by the amount of nitrogen oxides signal access control system that chimney gas oxynitride on-line measuring device detects, can automatically control induced draft fan rotating speed, thus realize the object automatically regulating coke oven chimney gas amount of nitrogen oxides.
Embodiment three:
As shown in Figure 1, a kind of coke oven stack gas oxynitride control device, the waste gas comprised above the waste gas supervisor 2 being communicated with coke oven main flue 1 and the air door 4 being arranged at coke oven exhaust gas shutter 3 is blown into mechanism 5, induced draft fan 6 is provided with between waste gas supervisor 2 and coke oven main flue 1, described waste gas is blown into mechanism 5 for three-port structure, waste gas supervisor 2 described in its path one end is communicated with, two ends path lays respectively at above the air door 4 of two adjacent coke oven exhaust gas shutters 3 in addition.
As shown in accompanying drawing 2,3, waste gas in the present embodiment is blown into mechanism 5 and comprises three-way body 51, waste gas described in the communication of the upper end supervisor 2 of described three-way body 51, described three-way body 51 arranges symmetrical left breeches pipe 52 and right breeches pipe 53 downwards respectively, the hinge 54 of described left breeches pipe 52 and right breeches pipe 53 junction is hinged with and exchanges turnover panel 55, and described hinge 54 outside is provided with Rocker arm 56 and is linked by pull bar 57 and exchange tie rod 58.
Adopt a kind of coke oven stack gas oxynitride control device of the present embodiment, can while commutation, waste gas is made to be blown into the left breeches pipe 52 of mechanism 5 or right breeches pipe 53 and air door opening and closing simultaneously, thus realize while coke oven exhaust gas shutter 3 air door opens, corresponding breeches pipe is opened simultaneously, thus realizes effective control of amount of nitrogen oxides in coke oven chimney in the mode of dilution air.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a coke oven stack gas oxynitride control method, comprising:
A, above coke oven exhaust gas shutter, lay waste gas supervisor, utilize induced draft fan to be drawn by the waste gas in coke oven main flue, and send into waste gas supervisor;
B, multiple waste gas is set is blown into mechanism in waste gas supervisor below, waste gas is blown into mechanism and comprises three-way body, waste gas described in the communication of the upper end supervisor of described three-way body, described three-way body arranges symmetrical left breeches pipe and right breeches pipe downwards respectively, described left breeches pipe and right breeches pipe junction are provided with exchange turnover panel, described exchange turnover panel is externally connected to rocking arm, and described rocking arm is linked by the exchange tie rod of pull bar and coke oven;
The exchange tie rod of C, coke oven is when pulling waste gas valve air door, pull described exchange turnover panel simultaneously, make the breeches pipe corresponding with the air door opened connect all the time, and side breeches pipe is closed in addition, thus be blown into waste gas while realizing sucking air, realize the object of air dilution.
2. a kind of coke oven stack gas oxynitride control method according to claim 1, is characterized in that, by regulating the adjustable exhausted air quantity being blown into air door of induced draft fan rotating speed, thus reaches the object regulating amount of nitrogen oxides in coke oven chimney.
3. a kind of coke oven stack gas oxynitride control method according to claim 2, it is characterized in that, oxynitride on-line measuring device is set, chimney gas oxynitride is carried out on-line checkingi, the amount of nitrogen oxides signal access control system detected, can automatically control induced draft fan rotating speed, thus realize the object automatically regulating coke oven chimney gas amount of nitrogen oxides.
4. a coke oven stack gas oxynitride control device, the waste gas supervisor and the waste gas be arranged at above coke oven exhaust gas shutter air door that comprise connection coke oven main flue are blown into mechanism, it is characterized in that, induced draft fan is provided with between described waste gas supervisor and coke oven main flue, it is three-port structure that described waste gas is blown into mechanism, waste gas supervisor described in its path one end is communicated with, two ends path lays respectively at above the air door of two adjacent coke oven exhaust gas shutters in addition.
5. a kind of coke oven stack gas oxynitride control device according to claim 2, it is characterized in that, described waste gas is blown into mechanism and comprises three-way body, waste gas described in the communication of the upper end supervisor of described three-way body, described three-way body arranges symmetrical left breeches pipe and right breeches pipe downwards respectively, described left breeches pipe and right breeches pipe junction are provided with exchange turnover panel, and described exchange turnover panel is externally connected to rocking arm, and described rocking arm is linked by the exchange tie rod of pull bar and coke oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737956.4A CN105199749A (en) | 2015-11-03 | 2015-11-03 | NOx control method and device for coke oven stack gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510737956.4A CN105199749A (en) | 2015-11-03 | 2015-11-03 | NOx control method and device for coke oven stack gas |
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| Publication Number | Publication Date |
|---|---|
| CN105199749A true CN105199749A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510737956.4A Pending CN105199749A (en) | 2015-11-03 | 2015-11-03 | NOx control method and device for coke oven stack gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106010587A (en) * | 2016-07-21 | 2016-10-12 | 中冶焦耐(大连)工程技术有限公司 | Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas |
| CN106701108A (en) * | 2017-03-09 | 2017-05-24 | 安徽工业大学 | Double-control pipe network device for circulatory flue gas of coking furnace and use method of double-control pipe network device |
| CN109957407A (en) * | 2017-12-14 | 2019-07-02 | 宝钢工程技术集团有限公司 | Coke oven exhaust gas denitration and improvement coke oven heating device |
| CN110938440A (en) * | 2019-12-25 | 2020-03-31 | 中冶焦耐(大连)工程技术有限公司 | Coke oven flue gas blending process unit |
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| CN101066518A (en) * | 2007-06-08 | 2007-11-07 | 神华乌海煤焦化有限责任公司 | Coke oven coal loading dedust system |
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| CN204042077U (en) * | 2014-07-10 | 2014-12-24 | 宝山钢铁股份有限公司 | Pneumatic three-way switching valve is used in sinter fume circulation |
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| CN104861991A (en) * | 2015-04-23 | 2015-08-26 | 武汉钢铁(集团)公司 | Coke oven flue gas recycling system and processing method |
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| CN101066518A (en) * | 2007-06-08 | 2007-11-07 | 神华乌海煤焦化有限责任公司 | Coke oven coal loading dedust system |
| CN201387423Y (en) * | 2009-04-07 | 2010-01-20 | 北京三博中自科技有限公司 | Transverse oxygen content detecting device of burnt gas in coke oven |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105670650B (en) * | 2016-01-21 | 2019-07-23 | 金能科技股份有限公司 | Reduce the device and method that coke oven nitrogen oxides generates |
| CN106010587A (en) * | 2016-07-21 | 2016-10-12 | 中冶焦耐(大连)工程技术有限公司 | Coke oven heating method capable of lowering concentration of nitrogen oxides in waste gas |
| CN106701108A (en) * | 2017-03-09 | 2017-05-24 | 安徽工业大学 | Double-control pipe network device for circulatory flue gas of coking furnace and use method of double-control pipe network device |
| CN106701108B (en) * | 2017-03-09 | 2022-03-08 | 安徽工业大学 | Coke oven circulating flue gas double-control pipe network device and using method thereof |
| CN109957407A (en) * | 2017-12-14 | 2019-07-02 | 宝钢工程技术集团有限公司 | Coke oven exhaust gas denitration and improvement coke oven heating device |
| CN110938440A (en) * | 2019-12-25 | 2020-03-31 | 中冶焦耐(大连)工程技术有限公司 | Coke oven flue gas blending process unit |
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Application publication date: 20151230 |
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