CN101121893A - Method for controlling flue suction force in coke oven automatic heating system - Google Patents
Method for controlling flue suction force in coke oven automatic heating system Download PDFInfo
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- CN101121893A CN101121893A CNA200710053335XA CN200710053335A CN101121893A CN 101121893 A CN101121893 A CN 101121893A CN A200710053335X A CNA200710053335X A CN A200710053335XA CN 200710053335 A CN200710053335 A CN 200710053335A CN 101121893 A CN101121893 A CN 101121893A
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- coke
- flue
- suction force
- coke oven
- flue suction
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Abstract
The invention discloses a method for controlling the suction force of smoke flue in a coke-oven heating system. The method is capable to settle the problem of existing coke-ovens that the pressure at the kiln-eye of the vertical flue of the combustion chamber drops below 0Pa due to vacant gas input during the period when coke-oven heating is halted, and the heat loss of the coke-oven is increased when a large amount of air enters, and so forth. The control procedures are: when heating is halted, three control parameters (start time of the heating exchanger, the time of heating halation, and suction force of the smoke flue) of the coke-oven are sent to DCS distribution control system; DCS distribution control system controls the suction control and execution device of the coke-oven side and coke-side flue to reduce the opening degree of the flue shutter plate to reduce the pressure to 85-120Pa, and the pressure at the kiln-eye is kept at 0-5Pa; when heating is over, DCS distribution control system controls the suction control and execution device of the coke-oven side and coke-side flue to increase the opening degree of the flue shutter plate to restore the pressure to 170-190Pa until normal production is guaranteed.
Description
Technical field
The present invention relates to the working method of coking coke oven, specifically belong to the control of flue suction force in the coke oven automatic heating system.
Background technology
Existing coke oven heating automatic system adopts the control gas flow or adopts exchange to stop to heat dual mode and control coke oven temperature.
Adopt exchange to stop type of heating: because coke oven flue suction still is stabilized in normal controlled levels, its deficiency is: in stopping section heat-up time, coke oven heating system is not owing to there is blast furnace gas to send into, cause the pressure at flue peephole place, combustion chamber to become negative pressure below dropping to 0Pa pressure, as easy as rolling off a log suction freezing air, in addition, the same during with normal heating in exhaust gas disc place air admission amount, promptly air door is for often opening.Above-mentioned situation causes air to enter coke oven in a large number, and the coke oven heat-energy losses is increased, and causes fire-resistant brickwork joint cracking, damages body of heater, the work-ing life of having reduced coke oven.
Summary of the invention
The present invention is directed to above-mentioned coke oven heating system existing problem in stopping section heat-up time, a kind of coke oven heating system is proposed in stopping section heat-up time, make that flue suction force reduces, coal gas flue peephole place pressure remains pressure-fired power, the coke oven heat waste is little, reduce the coking thermal losses, the control method of stablizing furnace temperature and prolonging flue suction force in the coke oven coke oven automatic heating system in work-ing life.
The technical measures that address the above problem:
The control method of flue suction force in the coke oven automatic heating system, its controlled step is:
1),, at first coke oven is added heat exchanger and begin swap time, the heat-up time of stopping, these three controlled variable of flue suction force to be defeated by the DCS-distribution control system when entering when stopping to heat according to technique initialization;
2) divide flue suction force control performer by DCS-distribution control system control coke oven machine side and coke side, close bottom flue turnover panel aperture and drop to 85～120Pa, make the pressure at peephole place remain on 0～5Pa until flue suction force;
When 3) stopping heat-up time and finish, divide flue suction force control performer, open large flue turnover panel aperture and return to 170～190Pa to ordinary production until flue suction force by DCS-distribution control system control coke oven machine side and coke side.The pressure that it is characterized in that the peephole place remains on 0～1Pa.
The present invention compared with prior art; have and make flue suction force reduce (have promptly that 170 original～190Pa is reduced to 85～120Pa), flue pressure peephole place, combustion chamber pressure remains pressure-fired power; freezing air intrusion amount is little; thereby the coke oven heat waste is reduced, reduce the coking thermal losses, keep furnace temperature stable; prevented the cracking of the fire-resistant brickwork joint of coke oven; protect body of heater, prolonged its work-ing life, and simple to operate.
Embodiment
Embodiment 1
The control method of flue suction force in the coke oven automatic heating system, its controlled step is:
1), according to technique initialization, entered in per 30 minutes and to stop heating.With 30 minutes heat-up times, stop 132 seconds heat-up times, these three controlled variable of flue suction force 90 ± 5Pa are defeated by the DCS-distribution control system;
2), divide flue suction force control performer, close bottom flue turnover panel aperture and drop to 90 ± 5Pa, make the pressure at peephole place remain on 0～0.5Pa until flue suction force by DCS-distribution control system control coke oven machine side and coke side;
3), when stopping heat-up time and finishing, divide flue suction force control performer, open large flue turnover panel aperture and return to 175Pa to ordinary production until flue suction force by DCS-distribution control system control coke oven machine side and coke side.
Embodiment 2
The coke oven automatic system adds the control method of pining for flue suction force, and its controlled step is:
1), entered in per 30 minutes and to stop heating according to technique initialization.With 30 minutes heat-up times, stop 92 seconds heat-up times, these three controlled variable of flue suction force 100 ± 5Pa are defeated by the DCS-distribution control system;
2), divide flue suction force control performer, close bottom flue turnover panel aperture and drop to 100 ± 5Pa, and make the pressure at peephole place remain on 0～1.5Pa until flue suction force by DCS-distribution control system control coke oven machine side and coke side;
3), when stopping heat-up time and finishing, divide flue suction force control performer, open large flue turnover panel aperture and return to 180Pa to ordinary production until flue suction force by DCS-distribution control system control coke oven machine side and coke side.
Embodiment 3
The coke oven automatic system adds the control method of pining for flue suction force, and its controlled step is:
1), entered in per 30 minutes and to stop heating according to technique initialization.With 30 minutes heat-up times, stop 79 seconds heat-up times, these three controlled variable of flue suction force 110 ± 5Pa are defeated by the DCS-distribution control system;
2), divide flue suction force control performer, close bottom flue turnover panel aperture and drop to 110 ± 5Pa, and make the pressure at peephole place remain on 0～3.5Pa until flue suction force by DCS-distribution control system control coke oven machine side and coke side;
3), when stopping heat-up time and finishing, divide flue suction force control performer, open large flue turnover panel aperture and return to 180Pa to ordinary production until flue suction force by DCS-distribution control system control coke oven machine side and coke side.
Claims (2)
1. the control method of flue suction force in the coke oven automatic heating system, its controlled step is:
1),, at first coke oven is added heat exchanger and begin swap time, the heat-up time of stopping, these three controlled variable of flue suction force to be defeated by the DCS-distribution control system when entering when stopping to heat according to technique initialization;
2) divide flue suction force control performer by DCS-distribution control system control coke oven machine side and coke side, close bottom flue turnover panel aperture and drop to 85～120Pa, and make the pressure at peephole place remain on 0～5Pa until flue suction force;
When 3) stopping heat-up time and finish, divide flue suction force control performer, open large flue turnover panel aperture and return to 170～190Pa to ordinary production until flue suction force by DCS-distribution control system control coke oven machine side and coke side.
2. the control method of flue suction force in the coke oven automatic heating system as claimed in claim 1 is characterized in that the pressure at peephole place remains on 0～1Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710053335XA CN101121893B (en) | 2007-09-21 | 2007-09-21 | Method for controlling flue suction force in coke oven automatic heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710053335XA CN101121893B (en) | 2007-09-21 | 2007-09-21 | Method for controlling flue suction force in coke oven automatic heating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101121893A true CN101121893A (en) | 2008-02-13 |
| CN101121893B CN101121893B (en) | 2010-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710053335XA Expired - Fee Related CN101121893B (en) | 2007-09-21 | 2007-09-21 | Method for controlling flue suction force in coke oven automatic heating system |
Country Status (1)
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| CN (1) | CN101121893B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102241992A (en) * | 2010-05-14 | 2011-11-16 | 湖南省醴陵市马恋耐火泥有限公司 | Reconstruction method of 7.63 meter coke oven |
| CN101353580B (en) * | 2008-08-26 | 2012-04-18 | 武汉钢铁(集团)公司 | 7.63m coke oven upper spanning hole masonry method |
| CN103911167A (en) * | 2013-01-08 | 2014-07-09 | 宝山钢铁股份有限公司 | Add and subtract suction control system during coke oven longitudinal temperature measurement, and control method thereof |
| CN105176554A (en) * | 2015-09-07 | 2015-12-23 | 中国庆华能源集团有限公司 | Method of controlling coke quality for plateau coking |
| CN113801665A (en) * | 2021-10-19 | 2021-12-17 | 马鞍山钢铁股份有限公司 | Coke oven flue gas desulfurization and denitrification safety control system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266251C (en) * | 2003-12-26 | 2006-07-26 | 中国科学院自动化研究所 | Automatic heating method for coke oven coking production |
| JP4258454B2 (en) * | 2004-08-10 | 2009-04-30 | 住友金属工業株式会社 | Control recovery method of coke oven generated coal crude gas suction pressure |
-
2007
- 2007-09-21 CN CN200710053335XA patent/CN101121893B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353580B (en) * | 2008-08-26 | 2012-04-18 | 武汉钢铁(集团)公司 | 7.63m coke oven upper spanning hole masonry method |
| CN102241992A (en) * | 2010-05-14 | 2011-11-16 | 湖南省醴陵市马恋耐火泥有限公司 | Reconstruction method of 7.63 meter coke oven |
| CN103911167A (en) * | 2013-01-08 | 2014-07-09 | 宝山钢铁股份有限公司 | Add and subtract suction control system during coke oven longitudinal temperature measurement, and control method thereof |
| CN103911167B (en) * | 2013-01-08 | 2016-02-24 | 宝山钢铁股份有限公司 | Plus-minus suction control system and control method when coke oven mean flue temperature is measured |
| CN105176554A (en) * | 2015-09-07 | 2015-12-23 | 中国庆华能源集团有限公司 | Method of controlling coke quality for plateau coking |
| CN113801665A (en) * | 2021-10-19 | 2021-12-17 | 马鞍山钢铁股份有限公司 | Coke oven flue gas desulfurization and denitrification safety control system |
| CN113801665B (en) * | 2021-10-19 | 2022-07-15 | 马鞍山钢铁股份有限公司 | Coke oven flue gas desulfurization and denitrification safety control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101121893B (en) | 2010-12-01 |
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Granted publication date: 20101201 Termination date: 20160921 |
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