CN102517042B - A coke oven heating method capable of controlling multi-stage combustion - Google Patents
A coke oven heating method capable of controlling multi-stage combustion Download PDFInfo
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- CN102517042B CN102517042B CN201110168228.8A CN201110168228A CN102517042B CN 102517042 B CN102517042 B CN 102517042B CN 201110168228 A CN201110168228 A CN 201110168228A CN 102517042 B CN102517042 B CN 102517042B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 65
- 239000000571 coke Substances 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 107
- 239000011449 brick Substances 0.000 claims abstract description 33
- 239000002912 waste gas Substances 0.000 claims abstract description 26
- 238000005192 partition Methods 0.000 claims abstract description 20
- 238000003763 carbonization Methods 0.000 claims abstract description 7
- 238000007865 diluting Methods 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 2
- 238000004939 coking Methods 0.000 abstract description 21
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 206010022000 influenza Diseases 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 description 10
- 238000011144 upstream manufacturing Methods 0.000 description 10
- 239000003034 coal gas Substances 0.000 description 6
- 230000011218 segmentation Effects 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001314 paroxysmal effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Abstract
The invention relates to a coke oven heating method capable of controlling multi-section combustion in the field of metallurgical coking, which is characterized in that blast furnace gas and air are fed into a vertical flue of a combustion chamber in sections, waste gas generated by combustion rises to the top of the vertical flue, turns to enter a downdraft vertical flue through a crossover hole, enters an adjacent regenerator through a downdraft inclined flue at the bottom of the vertical flue, exchanges heat with checker bricks in the regenerator, and the cooled waste gas enters a small flue through an adjustable grate hole and finally is discharged to a chimney through a main flue. The root of the partition wall between the two vertical flues of the duplex flue is provided with a waste gas circulation hole, waste gas in the downdraft vertical flue is sucked into the upwind vertical flue through the waste gas circulation hole and is mixed with upwind combustion airflow, and the purposes of diluting combustion mixed gas, reducing the intensity of combustion, lengthening flame and improving the uniformity of high-direction heating of the carbonization chamber are achieved. The method is suitable for large-scale development of the coke oven, can effectively improve the uniformity of high-direction heating of the coke oven, reduces heat loss, and is beneficial to environmental protection.
Description
Technical field
The present invention relates to metallurgical coking field, particularly pressures inside multi-section-combustion control method.
Background technology
Along with the development of coking technology, national policy is also more and more higher to the environmental requirement of coking industry, especially to the disposal of pollutants of coking paroxysmal, NO
xemission limit set is more and more stricter.Therefore, Coke-oven Design, just towards the structural development that maximizes and combine with Multi-point combustion control, to reduce coke pushing number of times, reduces NO
xbe generated as target, thereby meet the requirement of environmental protection.
Summary of the invention
The object of this invention is to provide the segmentation infeed flue burning respectively of a kind of re-heat down-regulation type, blast furnace gas and air, the coke oven heating means of spraying under coke-oven gas, the method is applicable to coke oven large scale development, can effectively improve coke oven high to heating uniformity, minimizing thermosteresis, is conducive to environmental protection.
For achieving the above object, the present invention is achieved through the following technical solutions:
Coke oven heating means of controlling multi-section-combustion, comprise combustion chamber, coking chamber, regenerator.Combustion chamber is made up of some flues, and each,, to a twinflue of flue composition, is provided with partition wall between twinflue two flues, and its top is communicated with by crossing over hole; It is characterized in that, blast furnace gas, air segmenting feed combustion chamber flue, the waste gas that burning produces rises to flue top, turn to and enter downdraft flue through leap hole, downdraft through flue bottom enters adjacent regenerator through chute, in regenerator, carry out heat exchange with checker brick, the waste gas after cooling enters bottom flue through adjustable grate hole, finally by dividing a flue, main flue to smoke stack emission.
In described combustion chamber flue partition, be provided with multistage blast furnace gas and air for entrance, blast furnace gas, air first paragraph are positioned at flue bottom for entrance, it is high to being distributed in different positions that multistage blast furnace gas and air feed opening's edge combustion chamber flue partition, is provided with slidably adjusting brick in exit topmost at it.
Coke oven heating means of controlling multi-section-combustion, comprise combustion chamber, coking chamber, regenerator.Combustion chamber is made up of some flues, and each,, to a twinflue of flue composition, is provided with partition wall between twinflue two flues, and its top is communicated with by crossing over hole; It is characterized in that, while using coke-oven gas combustion heating, coke-oven gas adopts lower spray to be fed by flue bottom, air segmenting feeds combustion chamber flue, and the waste gas that burning produces rises to flue top, turns to and enters downdraft flue through leap hole, downdraft chute through flue bottom enters adjacent regenerator, in regenerator, carry out heat exchange with checker brick, the waste gas after cooling enters bottom flue through adjustable grate hole brick, finally discharges by main flue to chimney.
While using blast furnace gas combustion heating, blast furnace gas and air segmenting feed combustion chamber flue burning, the waste gas that burning produces rises to flue top, turn to and enter downdraft flue through leap hole, downdraft chute through flue bottom enters adjacent regenerator, in regenerator, carry out heat exchange with checker brick, the waste gas after cooling enters bottom flue through adjustable grate hole, finally discharges by main flue to chimney.
The root of described twinflue two flue partitions is provided with exhaust gas circulation hole, by exhaust gas circulation hole by the Abgasabsaugung in downdraft flue to upstream flue, mix with the combustion gas flowing rising, reach dilute combustion gas mixture, reduce burning severe degree, elongate flame, improve the high object to heating uniformity of coking chamber.
Described blast furnace gas, the infeed amount of air change the feed rate of air-flow by changing the airflow sectional area of the adjustable grate brick between regenerator bottom and bottom flue top, adopt in grate brick hole and add and subtract adjusting brick realization adjusting.
The method is applicable to the coke oven that coking chamber height is 5-10 rice, can adopt blast furnace gas, two kinds of fuel heat supplies of coke-oven gas.
Compared with prior art, the invention has the beneficial effects as follows:
1) use the method effectively to improve coke oven high to heating uniformity, realize coke oven to large scale development; More than using that the coke furnace carbonization chamber of this method is high and can reaching 7m to size; Along with coke oven maximizes, coking chamber single hole is volume gain.Produce same output coke, coke pushing number of times reduces, and paroxysmal exhaust emission reduces, and effectively promotes the operation efficiency of coke over machinery;
2) while using blast furnace gas heat supply, air and blast furnace gas segmentation feed flue, and air gas infeed amount is all adjustable; This method combines with waste gas circulation, can effectively improve coke oven high to heating uniformity, minimizing thermosteresis, has improved the thermo-efficiency of coke oven;
3), while adopting coke-oven gas heat supply, spray under coke-oven gas, air segmenting feed flue, burn, then in conjunction with exhaust gas recirculation, can effectively improve coke oven high to heating uniformity with coke-oven gas, reduce thermosteresis, have improved the thermo-efficiency of coke oven;
4) while adopting blast furnace gas heat supply, row burning when blast furnace gas, air segmenting feed in flue, then in conjunction with exhaust gas recirculation, can effectively improve coke oven high to heating uniformity, and reduce thermosteresis, improve the thermo-efficiency of coke oven;
5) sectional combustion and exhaust gas recirculation are conducive to control combustion, reduce the severe degree of coke-oven gas burning, reduce high temperature dot, thereby reduce NO
xgeneration, be more conducive to environmental protection.
Accompanying drawing explanation
Fig. 1 is coking furnace shaft sectional view of the present invention;
Fig. 2 is coking furnace shaft burning sectional view of the present invention.
In figure: 2-coking chamber 3-upstream flue 4-downdraft flue 5-downdraft chute 6-upstream chute 7-upstream chute 8-regenerator (this exchange of 1-combustion chamber, waste gas) 9-bottom flue (waste gas, this exchange) 10-coal gas bottom flue 11-air bottom flue 12-gas regenerator 13-air regenerator 14-coke-oven gas passage 15-blast furnace gas, air the-section is for entrance (chute outlet) 16-twinflue partition wall 17-second segment blast furnace gas, air is for the 3rd section of blast furnace gas of entrance 18-, air is crossed over hole 20-exhaust gas circulation hole for entrance 19-twinflue
Embodiment
Describe furnace binding of the present invention and heating means in detail below in conjunction with accompanying drawing.
See Fig. 1, coke oven construction comprises combustion chamber 1, coking chamber 2, chute, regenerator, and chute comprises upstream chute 6, upstream chute 7, downdraft chute 5 (this exchange shown in Fig. 1); Regenerator comprises gas regenerator 12, air regenerator 13, waste gas regenerator 8 (this exchange shown in Fig. 1).Coking coal packs coking chamber 2 into by the oven top of coke oven hole of coalingging, and by providing heat that shove charge coal is smelt to coke with coking chamber 2 combustion chamber alternately, the raw gas of generation enters gas recovery system by the rising pore at furnace roof position.
See Fig. 2, coke oven combustion chamber comprises that combustion chamber twinflue, air and coal gas (blast furnace gas, coke-oven gas) are for entrance, twinflue leap hole 19, flue bottom exhaust gas circulation hole 20.Twinflue is made up of upstream flue 3 and downdraft flue 4, is communicated with by the leap hole 19 at flue top.
Air and coal gas comprise that for entrance blast furnace gas, air first paragraph supply entrance 18 for entrance 15, second segment blast furnace gas, air for entrance 17 and the 3rd section of blast furnace gas, air, blast furnace gas, air first paragraph are positioned at flue bottom for entrance 15 (being chute outlet), and three sections of air are positioned at combustion chamber flue and are positioned at different height for entrance.Blast furnace gas, air passageways 16 are positioned at the partition wall of flue.In the time adopting coke-oven gas to be fuel, air is the mode that multistage feeds flue, and air multistage feeds the structure of structure with blast furnace gas combustion, and coke-oven gas sprays into flue bottom by coke-oven gas nozzle 21.
The root of twinflue midfeather is provided with exhaust gas circulation hole 20, by exhaust gas circulation hole 20, two flue bottoms are connected, by the Abgasabsaugung in downdraft flue 4 to upstream flue 3, mix with the combustion gas flowing rising, reach dilute combustion gas mixture, reduce burning severe degree, elongate flame, improve the high object to heating uniformity of coking chamber.
Bottom, combustion chamber is chute, and chute bottom is regenerator.In chute, there is the gas channel mutually staggering to be connected with air regenerator and gas regenerator respectively, as shown in Figure 1 and Figure 2, gas passage 16 in the twinflue partition wall of combustion chamber is respectively blast furnace gas and air passageways, blast furnace gas and air passageways communicate with gas regenerator 12 and air regenerator 13 by chute 7 and chute 6 respectively, and the waste gas after burning enters regenerator 8 by downdraft chute 5.The little partition wall in regenerator Bei16 road is divided into 17 little regenerator of lattice, has porous checker brick in little regenerator, has the adjustable grate hole that can regulate size at little regenerator bottom; By realizing gas by the adjusting of sectional area at vault to grate hole plus-minus adjusting brick.Be bottom flue in little regenerator bottom, the outer end of bottom flue is connected with a point flue, finally discharges by main flue to chimney.
The present embodiment coke oven mode of operation is divided into two kinds of heat supply OFF state, and corresponding two kinds of fuel heat supplies, are specifically described as follows:
1. use blast furnace gas as fuel and air mixed burning, coke oven to be heated
1) air and blast furnace gas respectively via air bottom flue 11 below of air regenerator 13 and gas regenerator 12, coal gas bottom flue 10 by adjustable grate hole divide distribution capacity laggard enter each self-corresponding air regenerator 13 and gas regenerator 12;
2) checker brick that enter in air, blast furnace gas and the regenerator of air regenerator 13 and gas regenerator 12 carry out heat exchange, rise to regenerator top to be warming up to～1100 ℃;
3) heating gas and the warm air on arrival regenerator top enter the each self-corresponding chute in regenerator top, and preheated air enters chute 6, and the blast furnace gas of preheating enters chute 7; Then be divided into two-way through chute and enter respectively the gas channel 16 in the chute outlet 15 of flue bottom, combustion chamber and combustion chamber flue partition;
4) entering the hot blast furnace gas of combustion chamber and warm air is divided into three parts and feeds flues and burn; Blast furnace gas, air first paragraph are chute outlet 15 at the bottom of flue, second segment blast furnace gas, air for entrance 17, the 3rd section of blast furnace gas, air for entrance 18 for entrance; Three sections of blast furnace gases, gas inlets are positioned at different height, and the mode that this kind of gas multistage feeds is particularly suitable for the maximization design of coke oven, can make coal gas height upwards combustion distribution more evenly, more abundant;
5) waste gas that burning produces rises to the leap hole 19 on flue top, then turn to and enter downdraft flue 4, downdraft chute 5 outlets at the bottom of flue enter adjacent regenerator 8, in regenerator 8, carry out heat exchange with checker brick, be cooled to after the heat exchange～waste gas of 270 ℃ enters bottom flue, waste gas lobe and flue bent pipe by a point flue through adjustable grate hole again, finally discharges by main flue to chimney;
6) waste gas circulation: have exhaust gas circulation hole 20 at the root of a twinflue midfeather, the jet power of upstream and heat buoyancy can produce negative pressure herein, Abgasabsaugung in downdraft is come, it is mixed with the combustion gas flowing rising, reach dilute combustion gas mixture, reduce burning severe degree, the target of elongating flame, finally reaches the high object to heating uniformity of coking chamber;
7) sectional combustion gas flow-regulating: be provided with slidably adjusting brick in the outlet of segmentation air feed top, can change pneumatic outlet sectional area by stirring adjusting brick, thereby it is high to distribution of air flow ratio to change segmentation air feed, high to heating uniformity object to reach adjusting;
So far a combustion processes that, uses blast furnace gas to heat as fuel and air combustion has accused.
2. use coke-oven gas as fuel and air mixed burning, coke oven to be heated
1) air enters corresponding regenerator via air regenerator 13 and gas regenerator 12 coal gas bottom flue 10, air bottom flue 11 below after distributing by adjustable grate hole;
2) checker brick that enter in air and the regenerator of air regenerator 13 and gas regenerator 12 carry out heat exchange, then rise to regenerator top;
3) warm air at arrival regenerator top enters in regenerator top chute 6 and chute 7, then enters the gas channel 16 in flue bottom, combustion chamber and combustion chamber flue partition;
4) after the coke-oven gas nozzle 21 that coke-oven gas is flowed through at the bottom of the gas pipe brick in process pipe gasburner, the regenerator main wall of vault, gas pipe brick and the flue in chute district, enter flue 3;
5) warm air that enters combustion chamber be divided into three parts (air first paragraph for entrance be chute outlet 15 at the bottom of flue, second segment air for entrance 17, the 3rd section of air for entrance 18; ) carry out mixed firing with the coke-oven gas ejecting through coke-oven gas nozzle 21;
6) high-temp waste gas that burning produces rises to the leap hole 19 on flue top, then turn to and enter downdraft flue 4, downdraft chute 5 outlets at the bottom of flue enter regenerator 8, in regenerator 8, carry out heat exchange with checker brick, be cooled to after heat exchange～300 ℃ of waste gas enter bottom flue, waste gas lobe and flue bent pipe by a point flue through adjustable grate hole again, finally discharge by main flue to chimney;
7) waste gas circulation: the root of a twinflue midfeather has exhaust gas circulation hole 20, the jet power of upstream and heat buoyancy can produce negative pressure herein, Abgasabsaugung in downdraft is come, it is mixed with the combustion gas flowing rising, reach dilute combustion gas mixture, reduce burning severe degree, the target of elongating flame, finally reaches the high object to heating uniformity of coking chamber.
8) sectional combustion gas flow-regulating: be provided with slidably adjusting brick in the outlet of segmentation air feed top, can change pneumatic outlet basal area by stirring adjusting brick, thereby it is high to air partition rate to change segmentation air feed, high to heating uniformity object to reach adjusting;
It is the coke oven higher to environmental requirement of 5～10 meters that two kinds of fuel type of heating of coke oven of this embodiment and structure are all suitable for for coking chamber height.
Claims (2)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110168228.8A CN102517042B (en) | 2011-06-21 | 2011-06-21 | A coke oven heating method capable of controlling multi-stage combustion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110168228.8A CN102517042B (en) | 2011-06-21 | 2011-06-21 | A coke oven heating method capable of controlling multi-stage combustion |
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| CN102517042A CN102517042A (en) | 2012-06-27 |
| CN102517042B true CN102517042B (en) | 2014-05-21 |
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| CN102925164A (en) * | 2012-11-13 | 2013-02-13 | 中冶焦耐工程技术有限公司 | Coke oven heating method |
| CN106318409A (en) * | 2016-08-23 | 2017-01-11 | 迁安市九江煤炭储运有限公司 | Process for replacing coke oven gas by gasifying furnace gas |
| CN106635068A (en) * | 2017-02-10 | 2017-05-10 | 北京华泰焦化工程技术有限公司 | Coke oven and heating method thereof |
| TWI681048B (en) * | 2017-09-15 | 2020-01-01 | 德商蒂森克虜伯工業解決方案股份有限公司 | Coke oven device having a circular flow path with an encircling flow around it for the production of coke, and method for operating the coke oven device, and control installation, and use thereof |
| DE102019206628B4 (en) * | 2019-05-08 | 2024-04-18 | Thyssenkrupp Ag | Coke oven device for producing coke and method for operating the coke oven device and use |
| CN110938447B (en) * | 2019-12-27 | 2024-06-11 | 中冶焦耐(大连)工程技术有限公司 | A coke oven structure and segmented heating and combustion method thereof |
| CN110982545B (en) * | 2020-01-02 | 2025-05-23 | 华泰永创(北京)科技股份有限公司 | Combustion chamber of coke oven and coke oven |
| CN112538360B (en) * | 2020-12-21 | 2024-07-09 | 中冶焦耐(大连)工程技术有限公司 | Combined adjustable gas-rich heating coke oven |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103685A (en) * | 1985-05-14 | 1986-07-09 | 武汉钢铁公司技术部 | Di-hairpin (quaternary) circulation flues of coke ovens |
| CN1036786A (en) * | 1988-04-15 | 1989-11-01 | 克鲁普科普斯有限公司 | Reduce NO in the flue gas during pit kiln heating xThe pit kiln of the method for content and enforcement this method |
| CN1133337A (en) * | 1995-11-28 | 1996-10-16 | 程相魁 | Heat-exchanging top-jetting no-recovering chamber type coke furnace |
-
2011
- 2011-06-21 CN CN201110168228.8A patent/CN102517042B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103685A (en) * | 1985-05-14 | 1986-07-09 | 武汉钢铁公司技术部 | Di-hairpin (quaternary) circulation flues of coke ovens |
| CN1036786A (en) * | 1988-04-15 | 1989-11-01 | 克鲁普科普斯有限公司 | Reduce NO in the flue gas during pit kiln heating xThe pit kiln of the method for content and enforcement this method |
| CN1133337A (en) * | 1995-11-28 | 1996-10-16 | 程相魁 | Heat-exchanging top-jetting no-recovering chamber type coke furnace |
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