CN102444898B - Power station boiler dry slag discharge air infiltration control system and method - Google Patents
Power station boiler dry slag discharge air infiltration control system and method Download PDFInfo
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- CN102444898B CN102444898B CN 201110387291 CN201110387291A CN102444898B CN 102444898 B CN102444898 B CN 102444898B CN 201110387291 CN201110387291 CN 201110387291 CN 201110387291 A CN201110387291 A CN 201110387291A CN 102444898 B CN102444898 B CN 102444898B
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- 239000002893 slag Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 7
- 230000008595 infiltration Effects 0.000 title abstract description 7
- 238000001764 infiltration Methods 0.000 title abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 12
- 239000010935 stainless steel Substances 0.000 claims abstract description 12
- 238000001931 thermography Methods 0.000 claims description 34
- 230000001174 ascending effect Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 239000002956 ash Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A power station boiler dry slag discharge air infiltration control system and a method belong to the field of power station boiler dry slag discharge. A cold ash bucket is fixedly connected with a dry slag discharge box body. An electric air door is located in the middle of the side face of the dry slag discharge box body. A stainless steel conveying belt is disposed inside the dry slag discharge box body. The tail end of an ascending section of the dry slag discharge box body is connected with the top end of a slag bucket. The upper portion in the slag bucket is fixedly connected with a slag crusher, the bottom portion in the slag bucket is connected with a conveyor which is connected with a bucket conveyor, and the other end of the bucket conveyor is connected with a slag bin. By controlling opening and closing of the electric air door, the air infiltration problem in the power station boiler dry slag discharge air infiltration control system is resolved, the temperature of slag passing through the cold ash bucket is led to keep from 750 DEG C to 800 DEG C, the temperature of discharged smoke is normal, and economical efficiency of boiler operation is maintained.
Description
Technical field
The invention belongs to the power station boiler dry slag discharge field.
Background technology
Closely during the last ten years, the survival and development of the power plant take coal as fuel are subject to ash occupation of land and water consumption, the wearing and tearing of grey pipeline, the restriction of environmental pollution; So, all carried out total utilization of PCA, at present flyash is mainly used in building the road and as the material of dosing of cement.According to the market demand, in order to keep the activity of ash, each genco all adopts dry ash removal and dry slag disposal basically.When boiler adopted wet slag removal, boiler design furnace bottom air leakage coefficient mostly was greatly 0.05, because the restriction of slagging-off mode in most cases in early days, leaking out is greater than this value, and the later stage is owing to the improvement of deashing device mode, generally can approach or less than this value.And dry slag disposal, has leaked out into necessary so artificially designed air inlet owing to will chain be cooled off.The increase that the burner hearth furnace bottom leaks out causes boiler efficiency to descend, and exhaust gas temperature raises, and is large to the boiler economic influence, causes the unit generation coal consumption to raise, and exhaust gas temperature exceeds 10 ℃ of design loads, and gross coal consumption rate will increase about 3.5g/kwh.
Summary of the invention
The invention provides a kind of power station boiler dry slag discharge air infiltration control system and method, the problem of leaking out and causing exhaust gas temperature to raise, cause boiler efficiency to descend to solve dried dreg removing system.
The technical scheme that the present invention takes is: furnace hopper is fixedly connected with dried deslagging casing, MOD is positioned at dried dreg discharging box body side surface middle part, in this dried deslagging casing the stainless steel conveyer belt is arranged, the end of dried deslagging casing ascent stage is connected with the slag bucket top, this slag bucket internal upper part is fixedly connected with slag crusher, the bottom connects conveyer, this conveyer is connected with bucket elevator, this bucket elevator other end is connected with the slag storehouse, five/everywhere be fixedly connected with slag position measuring point one in the inside of slag bucket far from the bottom, 3/10ths places are fixedly connected with slag position measuring point two far from the bottom in the inside of slag bucket, horizontal segment terminus inner at dried deslagging casing is fixedly connected with infrared thermography instrument one, is fixedly connected with infrared thermography instrument two in the ascent stage of dried deslagging casing terminus inner;
The high 40cm of MOD, long 30cm, MOD is at a distance of 100cm;
The wide 2m of dried deslagging casing, long 32m, high 2.5m.
Method:
One, on slag drops on stainless steel chain in the dried deslagging casing from furnace hopper, the wide 1.4 ~ 1.5m of this stainless steel chain, the speed of service is 1m ~ 9m/ minute, the high 20 ~ 30cm of slag on the stainless steel chain,
During the temperature oc that two, records when the infrared thermography instrument one of horizontal segment end 〉=700 ℃, each MOD of horizontal segment is all opened; During the 600 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜700 ℃, each MOD of horizontal segment opens 80%; During the 500 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜600 ℃, each MOD of horizontal segment opens 70%; When the temperature that records when the infrared thermography instrument one of horizontal segment end was 400 ℃≤α＜500 ℃, each MOD of horizontal segment opened 50%; When the temperature that records when the infrared thermography instrument one of horizontal segment end is α＜400 ℃, each MOD complete shut-down of horizontal segment;
During the temperature oc that three, records when the infrared thermography instrument two of ascent stage end 〉=400 ℃, each MOD of ascent stage is all opened; During the 350 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜400 ℃, each MOD of ascent stage opens 80%; During the 300 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜350 ℃, each MOD of ascent stage opens 60%; During the 230 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜300 ℃, each MOD of ascent stage opens 50%; During the temperature oc that records when the infrared thermography instrument two of ascent stage end＜230 ℃, each MOD Close All of ascent stage;
Four, when slag in the slag bucket is high when surpassing the height of slag position measuring point one, the door of slag bucket bottom is opened slagging, and when slag height in the slag bucket during in the height of slag position measuring point two, the door of slag bucket bottom is closed not slagging;
The slag of five, emitting from slag bucket enters in the slag storehouse by conveyer, bucket elevator.
Advantage of the present invention is novel structure, by solving the Air Leakage in the power station boiler dry slag discharge air infiltration control system, makes the slag temperature by the furnace hopper place remain on 750 ℃ ~ 800 ℃, and exhaust gas temperature is normal, keeps the economy of boiler operatiopn.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
The present invention equally also is fit to 2 * 350MW unit take 2 * 300MW unit as example, and fuel is brown coal.
Furnace hopper 1 is fixedly connected with dried deslagging casing 2, MOD 3 is positioned at dried dreg discharging box body side surface middle part, in this dried deslagging casing stainless steel conveyer belt 4 is arranged, the end of dried deslagging casing ascent stage is connected with slag bucket 5 tops, this slag bucket internal upper part is fixedly connected with slag crusher 6, the bottom connects conveyer 7, this conveyer is connected with bucket elevator 8, this bucket elevator other end is connected with slag storehouse 9, five/everywhere be fixedly connected with slag position measuring point 1 in the inside of slag bucket far from the bottom, 3/10ths places are fixedly connected with slag position measuring point 2 11 far from the bottom in the inside of slag bucket, horizontal segment terminus inner at dried deslagging casing is fixedly connected with infrared thermography instrument 1, is fixedly connected with infrared thermography instrument 2 13 in the ascent stage of dried deslagging casing terminus inner;
The high 40cm of MOD, long 30cm, MOD is at a distance of 100cm;
The wide 2m of dried deslagging casing, long 32m, high 2.5m;
Method:
One, on slag drops on stainless steel chain in the dried deslagging casing from furnace hopper, the wide 1.4 ~ 1.5m of this stainless steel chain, the speed of service is 1m ~ 9m/ minute, the high 20 ~ 30cm of slag on the stainless steel chain,
During the temperature oc that two, records when the infrared thermography instrument one of horizontal segment end 〉=700 ℃, each MOD of horizontal segment is all opened; During the 600 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜700 ℃, each MOD of horizontal segment opens 80%; During the 500 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜600 ℃, each MOD of horizontal segment opens 70%; When the temperature that records when the infrared thermography instrument one of horizontal segment end was 400 ℃≤α＜500 ℃, each MOD of horizontal segment opened 50%; When the temperature that records when the infrared thermography instrument one of horizontal segment end is α＜400 ℃, each MOD complete shut-down of horizontal segment;
During the temperature oc that three, records when the infrared thermography instrument two of ascent stage end 〉=400 ℃, each MOD of ascent stage is all opened; During the 350 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜400 ℃, each MOD of ascent stage opens 80%; During the 300 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜350 ℃, each MOD of ascent stage opens 60%; During the 230 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜300 ℃, each MOD of ascent stage opens 50%; During the temperature oc that records when the infrared thermography instrument two of ascent stage end＜230 ℃, each MOD Close All of ascent stage;
Four, when slag in the slag bucket is high when surpassing the height of slag position measuring point one, the door of slag bucket bottom is opened slagging, and when slag height in the slag bucket during in the height of slag position measuring point two, the door of slag bucket bottom is closed not slagging;
The slag of five, emitting from slag bucket enters in the slag storehouse by conveyer, bucket elevator.
Claims (1)
1. a power station boiler dry slag discharge Air leakage control method is characterized in that comprising the following steps:
One, on slag drops on stainless steel chain in the dried deslagging casing from furnace hopper, the wide 1.4 ~ 1.5m of this stainless steel chain, the speed of service is 1m ~ 9m/ minute, the high 20 ~ 30cm of slag on the stainless steel chain,
During the temperature oc that two, records when the infrared thermography instrument one of horizontal segment end 〉=700 ℃, each MOD of horizontal segment is all opened; During the 600 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜700 ℃, each MOD of horizontal segment opens 80%; During the 500 ℃≤α of temperature that records when the infrared thermography instrument one of horizontal segment end＜600 ℃, each MOD of horizontal segment opens 70%; When the temperature that records when the infrared thermography instrument one of horizontal segment end was 400 ℃≤α＜500 ℃, each MOD of horizontal segment opened 50%; When the temperature that records when the infrared thermography instrument one of horizontal segment end is α＜400 ℃, each MOD complete shut-down of horizontal segment;
During the temperature oc that three, records when the infrared thermography instrument two of ascent stage end 〉=400 ℃, each MOD of ascent stage is all opened; During the 350 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜400 ℃, each MOD of ascent stage opens 80%; During the 300 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜350 ℃, each MOD of ascent stage opens 60%; During the 230 ℃≤α of temperature that records when the infrared thermography instrument two of ascent stage end＜300 ℃, each MOD of ascent stage opens 50%; During the temperature oc that records when the infrared thermography instrument two of ascent stage end＜230 ℃, each MOD Close All of ascent stage;
Four, when slag in the slag bucket is high when surpassing the height of slag position measuring point one, the door of slag bucket bottom is opened slagging, and this slag position measuring point one is positioned at the inside of slag bucket and apart from the bottom five/everywhere; When slag height in the slag bucket during in the height of slag position measuring point two, the door of slag bucket bottom is closed not slagging, and this slag position measuring point two is positioned at the inside of slag bucket and 3/10ths places apart from the bottom;
The slag of five, emitting from slag bucket enters in the slag storehouse by conveyer, bucket elevator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110387291 CN102444898B (en) | 2011-11-29 | 2011-11-29 | Power station boiler dry slag discharge air infiltration control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110387291 CN102444898B (en) | 2011-11-29 | 2011-11-29 | Power station boiler dry slag discharge air infiltration control system and method |
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| CN102444898A CN102444898A (en) | 2012-05-09 |
| CN102444898B true CN102444898B (en) | 2013-01-16 |
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| CN 201110387291 Active CN102444898B (en) | 2011-11-29 | 2011-11-29 | Power station boiler dry slag discharge air infiltration control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104132355A (en) * | 2014-07-25 | 2014-11-05 | 国家电网公司 | Dry-type deslagging system capable of adjusting cooling air |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2616811Y (en) * | 2003-04-25 | 2004-05-19 | 铁岭市华隆仪表有限公司 | Boiler slag-removing failure diagnosis and monitoring system |
| CN1587815A (en) * | 2004-09-13 | 2005-03-02 | 中天仕名科技集团有限公司 | Cooling system for dry slag of new boiler |
| JP3827916B2 (en) * | 2000-05-18 | 2006-09-27 | 株式会社タクマ | Detection method of defective molten slag discharge |
| CN101008492A (en) * | 2006-01-24 | 2007-08-01 | 北京国电富通科技发展有限责任公司 | Dry slag-draining device of coal boiler |
| CN201053686Y (en) * | 2007-06-14 | 2008-04-30 | 北京国电富通科技发展有限责任公司 | Bucket elevator with cooling function |
| CN102155743A (en) * | 2011-04-15 | 2011-08-17 | 山东电力研究院 | Ventilation control system and method applicable to dry type slag extractor |
-
2011
- 2011-11-29 CN CN 201110387291 patent/CN102444898B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3827916B2 (en) * | 2000-05-18 | 2006-09-27 | 株式会社タクマ | Detection method of defective molten slag discharge |
| CN2616811Y (en) * | 2003-04-25 | 2004-05-19 | 铁岭市华隆仪表有限公司 | Boiler slag-removing failure diagnosis and monitoring system |
| CN1587815A (en) * | 2004-09-13 | 2005-03-02 | 中天仕名科技集团有限公司 | Cooling system for dry slag of new boiler |
| CN101008492A (en) * | 2006-01-24 | 2007-08-01 | 北京国电富通科技发展有限责任公司 | Dry slag-draining device of coal boiler |
| CN201053686Y (en) * | 2007-06-14 | 2008-04-30 | 北京国电富通科技发展有限责任公司 | Bucket elevator with cooling function |
| CN102155743A (en) * | 2011-04-15 | 2011-08-17 | 山东电力研究院 | Ventilation control system and method applicable to dry type slag extractor |
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| CN102444898A (en) | 2012-05-09 |
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Owner name: JILIN PROV. POWER SCIENCE INST. CO., LTD. STATE EL Free format text: FORMER OWNER: JILIN ELECTRIC POWER SUPPLY COMPANY CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121008 Owner name: JILIN ELECTRIC POWER SUPPLY COMPANY CHINA ELECTRIC Free format text: FORMER OWNER: JILIN PROV. POWER SCIENCE INST. CO., LTD. Effective date: 20121008 |
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Effective date of registration: 20121008 Address after: 130021 Jilin City, Changchun province people's street, No. 4433 Applicant after: Electric Power Research Institute of Jilin Electric Power Company Applicant after: Jilin Academy of Electric Power Science Applicant after: State Grid Corporation of China Address before: 130021 Jilin City, Changchun province people's street, No. 4433 Applicant before: Jilin Academy of Electric Power Science Applicant before: Electric Power Research Institute of Jilin Electric Power Company |
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