CN101813312A - Device for desulphurization in circulating fluidized bed boiler - Google Patents
Device for desulphurization in circulating fluidized bed boiler Download PDFInfo
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- CN101813312A CN101813312A CN201010177495A CN201010177495A CN101813312A CN 101813312 A CN101813312 A CN 101813312A CN 201010177495 A CN201010177495 A CN 201010177495A CN 201010177495 A CN201010177495 A CN 201010177495A CN 101813312 A CN101813312 A CN 101813312A
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- absorbent
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- stokehold
- desulphurization
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Abstract
The invention discloses a device for desulphurization in a circulating fluidized bed boiler, which consists of a boiler coal feeding system and an absorbent feeding system, wherein the boiler coal feeding system consists of a coal bin in the front of the boiler, a gate plate, a coal feeding machine in the front of the boiler, a coal drop pipe and a hearth; the absorbent feeding system consists of an absorbent bin in the front of the boiler, a gate plate, an absorbent feeding machine and pipelines; the absorbent feeding machine conveys an absorbent to the coal feeding machine in the front of the boiler or the coal drop pipe behind the coal feeding machine through the pipelines; and the absorbent is mixed with coals and then the absorbent and the coals simultaneously enter a boiler furnace for combustion and desulphurization.
Description
The present invention relates to a kind of device of boiler flue desulfurization, especially relate to a kind of device of desulphurization in circulating fluidized bed boiler.
China is primary energy consumption in the world based on one of country of coal, causes a large amount of SO based on the energy consumption structure of coal
2Discharging, SO
2Human beings'health is caused direct harm, the SO in the atmosphere
2Form acid rain with rainfall, in harm humans health, and cause the acidifying of the burn into lake water of building and material, the acidifying and the impoverishment of soil, crops and Forest Growth are slowed down, fish growth is suppressed.
Desulphurization in circulating fluidized bed boiler technology is a kind of novel desulfur technology that develops rapidly in recent years, in system's design dual mode is arranged, and a kind of is hybrid, and a kind of is stand alone type.1. hybrid limestone desulfurization system is that desulfurization falls on the belt conveyor from hopper separately simultaneously with agstone and coal, is transported in the coal bin of stokehold temporaryly with coal, at last with coal, enters boiler furnace burning, desulfurization through the stokehold feeder.The advantage of this mode is that system is comparatively simple, reduced investment, and operation is convenient, and maintenance of equipment work amount is little.But it also has its some drawbacks.The first, ageing relatively poor, when the stokehold coal bin is filled a storehouse coal, and just this moment boiler SO
2Discharging exceeds standard, and wants in time to replenish agstone, reduces SO
2Discharging is just relatively more difficult, wait until always that this storehouse coal combustion could increase agstone after intact, and this will lag behind generally 8-9 hour.The second, the bad control of injection rate causes waste easily.We wish: the feeding coal of agstone can be according to SO
2Discharge value is controlled and is regulated, but on said system, coal and lime stone are to fall into simultaneously on the belt conveyor, and coal can not separate with the input quantity of lime stone to be controlled, can't be according to SO
2Discharge value regulate the lime stone feeding coal, do not reach the purpose that guarantees emission compliance.2. typical free-standing limestone desulfurization system is that the agstone that will advance the particle diameter≤1mm of factory transports plant area to tank car, be discharged to the outer agstone intermediate bin of on-site boiler room, being transported in the boiler room storage of the lime stone before the boiler by the downstriker storehouse pump Pneumatic conveyer under the limestone powder bin deposits, feed conveyance conduit by the machine supplying powder under the lime stone storehouse before the boiler again and agstone is blown into boiler furnace by the lime stone blower fan, participate in desulphurization reaction, to reach the purpose of desulfurization.The lime stone storehouse another program before the boiler is in the boiler room for agstone is transported to: the agstone that will advance the particle diameter≤1mm of factory transports plant area to car and is discharged to storage ground, with forklift with agstone from the storage transport to the agstone hopper, agstone falls into belt conveyor separately and is delivered directly to the lime stone storehouse before the boiler in the boiler room from the hopper of oneself.Recently, follow-on free-standing limestone desulfurization system is that the limestone powder bin agstone down that boiler room is outer is carried by batcher, Pneumatic conveyer and directly is blown into boiler furnace, the participation desulphurization reaction.Compare with hybrid, stand-alone system and equipment more complicated, investment is big, and the operation power consumption is many.But it can separate lime stone feeding system and coal supply system fully, can be freely according to SO
2Discharge value regulate the lime stone feeding coal at any time, thereby reach the purpose that guarantees emission compliance.
The device of a kind of desulphurization in circulating fluidized bed boiler that the objective of the invention is to propose, the feed of the agstone batcher under the lime stone storehouse before the boiler is directly delivered in stokehold feeder or the coal pipeline thereafter, agstone with enter boiler furnace burning, desulfurization after coal mixes simultaneously.So can one, according to SO
2Discharge value regulate the agstone batcher and change feeding coal, guarantee SO
2Emission compliance, two, remove the lime stone blower fan for typical free-standing limestone desulfurization system, simplify the agstone induction system, reduce investment, reduce the operation power consumption, avoid pipe wear, reach economical operation, reduce the purpose of maintenance capacity.
The present invention realizes like this, by the stokehold coal bin, flashboard, the stokehold feeder, the boiler coal feeding system that burner hearth is formed, and by the absorbent storehouse before the boiler, flashboard, the absorbent batcher, the device of a kind of desulphurization in circulating fluidized bed boiler that the absorbent feeding system that pipeline is formed is formed, the absorbent batcher is delivered to absorbent in the feeder of stokehold by pipeline, the coal of stokehold coal bin enters the stokehold feeder by the flashboard of opening like this, the absorbent in the absorbent storehouse before the boiler enters the absorbent batcher by the flashboard of opening, enter in the feeder of stokehold by pipeline then, entering boiler furnace after coal in absorbent and the stokehold feeder mixes simultaneously burns, desulfurization, stokehold feeder described here can adopt belt-type, buried scraper or the good conveyer of air-tightness such as spiral, absorbent refers to particle diameter≤6mm, the agstone of the finger particle diameter≤1mm of desulfurized effect the best, oyster shell whitings etc. contain CaCO
3, CaO material, the absorbent batcher can adopt belt-type, buried scraper, spiral, vane type, the good conveyer of air-tightness such as star-like.
The present invention realizes like this, the boiler coal feeding system that forms by stokehold coal bin, flashboard, stokehold feeder, coal spout, burner hearth, and the device of a kind of desulphurization in circulating fluidized bed boiler of forming by the absorbent feeding system that the absorbent storehouse before the boiler, flashboard, absorbent batcher, pipeline are formed, the absorbent batcher is delivered to absorbent in the coal spout behind the feeder of stokehold by pipeline, absorbent with enter boiler furnace burning, desulfurization simultaneously after the coal that comes out to enter coal spout from the stokehold feeder mixes.
The invention has the beneficial effects as follows, compare hybrid limestone desulfurization system one, can be according to SO
2Discharge value regulate the absorbent batcher and change feeding coal, guarantee SO
2Emission compliance, two, avoid excessively adding absorbent quantity and cause waste.From desulphurization mechanism, near its SO behind the coal combustion
2Concentration is the highest, CaCO in the absorbent
3Near calcining back CaO concentration it is the highest, and absorbent and coal are mixed and enter burner hearth and compare free-standing limestone desulfurization system and absorbent is sprayed into burner hearth, near the SO the CaO
2Concentration the former than latter height, so the former CaO and SO
2Reaction rate is higher, desulfurized effect is better, and the absorbed dose of radiation that needs is just little, and it is better therefore to compare free-standing limestone desulfurization system desulfurized effect, and the absorbent consumption is just little, and desulphurization cost reduces; In addition, compare typical free-standing limestone desulfurization system and remove the lime stone blower fan, simplify the absorbent induction system, reduce investment, reduce the operation power consumption, avoid pipe wear, reach economical operation, reduce the purpose of maintenance capacity.For large-scale CFBB more a plurality of coal supply points are arranged, should all join the absorbent feeding system that a cover is made up of the absorbent storehouse before the boiler, flashboard, absorbent batcher, pipeline for each coal supply point, as far as possible in the hope of reaching best desulfurized effect.
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a process principle figure of the present invention.
Fig. 2 is another process principle figure of the present invention.
1. stokehold coal bins among the figure, 2. flashboard, 3. stokehold feeder, 4. the absorbent storehouse before the boiler, 5. absorbent batcher, 6. burner hearth, 7. coal spout, 8. pipeline.
In Fig. 1, the device of a kind of desulphurization in circulating fluidized bed boiler that the present invention proposes, by stokehold coal bin (1), flashboard (2), stokehold feeder (3), the boiler coal feeding system that burner hearth (6) is formed, and by the absorbent storehouse (4) before the boiler, flashboard (2), absorbent batcher (5), the absorbent feeding system that pipeline (8) is formed is formed, absorbent batcher (5) is delivered to absorbent in the stokehold feeder (3) by pipeline (8), the coal of stokehold coal bin (1) enters stokehold feeder (3) by the flashboard of opening (2) like this, the absorbent in the absorbent storehouse (4) before the boiler enters absorbent batcher (5) by the flashboard of opening (2), enter in the stokehold feeder (3) by pipeline (8) then, enter boiler furnace (6) internal combustion simultaneously after the coal in absorbent and the stokehold feeder (3) mixes, desulfurization.
In embodiment illustrated in fig. 2, the device of a kind of desulphurization in circulating fluidized bed boiler that the present invention proposes, by stokehold coal bin (1), flashboard (2), stokehold feeder (3), coal spout (7), the boiler coal feeding system that burner hearth (6) is formed, and by the absorbent storehouse (4) before the boiler, flashboard (2), absorbent batcher (5), the absorbent feeding system that pipeline (8) is formed is formed, absorbent batcher (5) is delivered to absorbent in the coal spout (7) behind the stokehold feeder (3) by pipeline (8), the coal of stokehold coal bin (1) enters stokehold feeder (3) by the flashboard of opening (2) like this, the absorbent in the absorbent storehouse (4) before the boiler enters absorbent batcher (5) by the flashboard of opening (2), enter in the coal spout (7) behind the stokehold feeder (3) by pipeline (8) then, absorbent with enter boiler furnace (6) internal combustion simultaneously after coal in the coal spout (7) mixes, desulfurization.
Claims (2)
1. the device of a desulphurization in circulating fluidized bed boiler, the boiler coal feeding system that forms by stokehold coal bin, flashboard, stokehold feeder, burner hearth, and form by the absorbent feeding system that the absorbent storehouse before the boiler, flashboard, absorbent batcher, pipeline are formed, it is characterized in that: the absorbent batcher is delivered to absorbent in the feeder of stokehold by pipeline.
2. the device of a kind of desulphurization in circulating fluidized bed boiler according to claim 1 is characterized in that: the absorbent batcher is delivered to absorbent in the coal spout behind the feeder of stokehold by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010177495A CN101813312A (en) | 2010-05-05 | 2010-05-05 | Device for desulphurization in circulating fluidized bed boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010177495A CN101813312A (en) | 2010-05-05 | 2010-05-05 | Device for desulphurization in circulating fluidized bed boiler |
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| CN101813312A true CN101813312A (en) | 2010-08-25 |
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| CN201010177495A Pending CN101813312A (en) | 2010-05-05 | 2010-05-05 | Device for desulphurization in circulating fluidized bed boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094093A (en) * | 2011-03-04 | 2011-06-15 | 徐伟 | Method for producing ferronickel alloy grain by directly reducing lateritic nickel ore by rotary kiln |
| CN102128448A (en) * | 2011-04-21 | 2011-07-20 | 韩永胜 | Multifunctional coal bunker suitable for circulating fluidized bed boiler |
| CN104548920A (en) * | 2014-12-03 | 2015-04-29 | 河南神马尼龙化工有限责任公司 | Desulfurization device and desulfurization method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57153109A (en) * | 1981-02-19 | 1982-09-21 | Stal Laval Turbin Ab | Combustion equipment for polluting solid fuel |
| CN1587007A (en) * | 2004-08-27 | 2005-03-02 | 北京国电龙源环保工程有限公司 | Double blanking tubular storehouse |
-
2010
- 2010-05-05 CN CN201010177495A patent/CN101813312A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57153109A (en) * | 1981-02-19 | 1982-09-21 | Stal Laval Turbin Ab | Combustion equipment for polluting solid fuel |
| CN1587007A (en) * | 2004-08-27 | 2005-03-02 | 北京国电龙源环保工程有限公司 | Double blanking tubular storehouse |
Non-Patent Citations (3)
| Title |
|---|
| 张磊等: "《燃煤锅炉机组》", 28 February 2006, article "锅炉阀门", pages: 322 * |
| 张磊等: "《燃煤锅炉机组》", 28 February 2006, 中国电力出版社 * |
| 杨建华等: "《循环流化床锅炉设备及运行》", 31 January 2006, 中国电力出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094093A (en) * | 2011-03-04 | 2011-06-15 | 徐伟 | Method for producing ferronickel alloy grain by directly reducing lateritic nickel ore by rotary kiln |
| CN102128448A (en) * | 2011-04-21 | 2011-07-20 | 韩永胜 | Multifunctional coal bunker suitable for circulating fluidized bed boiler |
| CN104548920A (en) * | 2014-12-03 | 2015-04-29 | 河南神马尼龙化工有限责任公司 | Desulfurization device and desulfurization method |
| CN104548920B (en) * | 2014-12-03 | 2017-02-22 | 河南神马尼龙化工有限责任公司 | Desulfurization device and desulfurization method |
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Application publication date: 20100825 |