CN103566751B - A kind of fluidized-bed combustion boiler sulfur method and device thereof - Google Patents
A kind of fluidized-bed combustion boiler sulfur method and device thereof Download PDFInfo
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- CN103566751B CN103566751B CN201310531657.6A CN201310531657A CN103566751B CN 103566751 B CN103566751 B CN 103566751B CN 201310531657 A CN201310531657 A CN 201310531657A CN 103566751 B CN103566751 B CN 103566751B
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Abstract
The present invention relates to a kind of fluidized-bed combustion boiler sulfur method, comprise the following steps: the powdered lime stone in lime storage tank is delivered in injector by spiral shell thatch blower and pipeline, injector access compressed air, in injector, compressed air sprays into boiler secondary airduct in vaporific after mixing with lime stone, evenly enters burner hearth Mi Xiang district and sulfur dioxide high temperature state fully react under secondary wind action from boiler both sides.The ash of certain pressure, gas mixture are entered burner hearth at a high speed by injector by the present invention, lime material after atomization fully can react under the disturbance of boiler smoke wind speed with sulfur dioxide in boiler smoke, control stable through trial run, desulfuration efficiency is high, remarkable in economical benefits.
Description
technical field:
The present invention relates to a kind of effective fluidized bed boiler desulfurization technical field.
technical background:
In recent years, along with improving constantly of national requirements for environmental protection, waste gas qualified discharge is that enterprise has to an environmental protection index of strict implement.So far, various desulfur technology arises.Dry type desulfurizing, wet type desulfurizing, half dry type desulfurization etc.For CFBB, desulfuration in furnace raw material limestone consumes high, and desulfuration efficiency is low, affect that the normal working of a furnace of boiler is run, sulfur dioxide (SO2) emissions fluctuation is large in sweetening process because lime stone amount is uncontrollable.
summary of the invention:
Object of the present invention is exactly the deficiency existed for existing desulphurization in circulating fluidized bed boiler technology, a kind of effective fluidized bed boiler desulfurization method provided and device thereof.
The technical solution used in the present invention is as follows:
A kind of fluidized-bed combustion boiler sulfur method, it is characterized in that comprising the following steps: the powdered lime stone in lime storage tank is delivered in injector by spiral shell thatch blower and pipeline, injector access compressed air, in injector, compressed air sprays into boiler secondary airduct in vaporific after mixing with lime stone, evenly enters burner hearth Mi Xiang district and sulfur dioxide high temperature state fully react under secondary wind action from boiler both sides.
Present invention also offers a kind of fluidized-bed combustion boiler desulfurizer, it is characterized in that comprising:
Lime storage tank, manual flashboard and screw(-type) feeder is provided with below lime storage tank, be connected to injector by pipeline below screw(-type) feeder, be also connected with spiral shell thatch blower fan and restricting orifice in the pipeline below screw(-type) feeder, injector is connected with compressed air source by pipeline.
In the present invention's application, the lime stone of certain standard granularity is stored in lime storage tank, by frequency conversion charger continuous charging in pipeline storehouse.Power conduit roots blower provides power gas source that lime stone in pipeline storehouse is delivered to ash silo above boiler coal feeding mouth, atomising device access certain pressure compressed air, mixing chamber is entered together with ash material in ash silo above boiler coal feeding mouth, mixed lime stone and compressed air are that mist sprays into boiler secondary airduct, under secondary wind action, evenly enter burner hearth Mi Xiang district fully react in sulfur dioxide high temperature state from boiler both sides, to reduce content of sulfur dioxide in boiler smoke, accomplish row up to standard.Emulsion zone is in after lime stone enters burner hearth after improving, react more abundant under the condition of high temperature, move along with after flue gas, continuation is reacted by lime stone residual in temperature decline boiler back segment flue gas, because the reaction time is long, simultaneously to ensure that in returning charge ash that limestone content reaches minimize due to vaporific, desulfuration efficiency is high and stable.
For making pipeline air quantity Uniform Flow, not causing and breathing heavily flow phenomenon, install restricting orifice one additional at fan outlet, power wind flow is stablized, and lime stone is steady flow in pipeline, ensures that dosage is even.
Automatic frequency-conversion charger: bucket type receives master signal, controls frequency conversion size according to the change of actual sulfur dioxide and changes lime stone dosage to reach, thus realize auto feed.
Injector atomising device: this contrive equipment mainly quotes injector principle, namely using compressed air as working media, aspirates and force feed gas, to obtain the injector of vacuum.Compressed air enters injector, from nozzle, eject supersonic flow, and due to the viscosity of gas, high velocity air entrainments the gas in suction chamber, thus forms vacuum in suction chamber.This atomising device mainly consists of nozzle, mixed room, diffuser and suction chamber.Nozzle and these two parts of diffuser constitute the special airflow line of a section variation.Pressure energy becomes kinetic energy to bleed by nozzle by compressed air, and kinetic energy is become pressure energy by diffuser thus is exhausted by mixed airflow.Pressure differential between import and export, makes air be flowed in the duct.Because injection air-flow is comparatively large, make the gas ejected, grey mixture is vaporific, reach atomizing effect.Lime stone enters in the ash can above coal feeding hole, enters mixing chamber, spray into secondary air channel after mixed at high speed under the suction of injector together with compressed air, forms atomization shape at boiler emulsion zone.
Namely traditional Geldart-D particle and high velocity jet atomizing principles are applied to desulfuration in furnace field for above problem by its feature of the present invention.By changing air velocity, air and ash material are mixed, the ash of certain pressure, gas mixture enter burner hearth at a high speed by injector, owing to having certain pressure and flow velocity makes it be atomization shape.Ash material after atomization fully can be reacted under the disturbance of boiler smoke wind speed with sulfur dioxide in boiler smoke, and control stable through trial run, desulfuration efficiency is high, remarkable in economical benefits.
accompanying drawing illustrates:
Fig. 1 is present system structural representation.
detailed description of the invention:
Below by detailed description of the invention, this technology is set forth:
One, as shown in Figure 1, a kind of fluidized-bed combustion boiler desulfurizer provided by the invention, comprise: lime storage tank, manual flashboard and screw(-type) feeder is provided with below lime storage tank, injector is connected to by pipeline below screw(-type) feeder, also be connected with spiral shell thatch blower fan and restricting orifice in pipeline below screw(-type) feeder, injector is connected with compressed air source by pipeline.
Spiral shell thatch blower fan is the first conveying wind, and charger is exported ash material and is delivered to grey room below atomising device by Main Function, for guaranteeing that ash material Uniform Flow installs restricting orifice one additional at 2 meters of straight tube places after charger ash hole.
Injector atomising device is the second conveying wind, mainly desulfurizing agent high speed atomisation shape is sent into boiler secondary bellows, enters burner hearth Mi Xiang district and SO 2 from fume reacts after mixed with Secondary Air.Position, boiler secondary air port is boiler feed opening 2 meters of.
Lime stone is by closed cell tank car pump in storage tank, and tank deck dust arrester installation prevents the collection of dust in canned operation.High pressure loosens wind and prevents lime stone caking in storage tank, and self-timing loosens lime stone in storage tank, guarantees that blanking is normal.Lime stone manually descend composite plate to screw(-type) feeder by Cemented filling to boiler secondary bellows atomising device ash silo, atomising device will enter burner hearth after the ash after mixed, pneumatic transmission to secondary air duct and sulfur dioxide reacts.
Control system adopts DCS to control, monitoring sulfur dioxide actual parameter, setting sulfur dioxide controling parameters, and the frequency conversion of Long-distance Control charger, realizes remote auto adjustment, stable.
Two, a kind of fluidized-bed combustion boiler sulfur method, comprise the following steps: the powdered lime stone in lime storage tank is delivered in injector by spiral shell thatch blower and pipeline, the compressed air of injector access 0.45MPa, in injector, compressed air sprays into boiler secondary airduct in vaporific after mixing with lime stone, evenly enters burner hearth Mi Xiang district and sulfur dioxide high temperature state fully react under secondary wind action from boiler both sides.
Claims (1)
1. a fluidized-bed combustion boiler sulfur method, it is characterized in that comprising the following steps: the powdered lime stone in lime storage tank is delivered in injector by spiral shell thatch blower and pipeline, injector access compressed air, in injector, compressed air sprays into boiler secondary airduct in vaporific after mixing with lime stone, evenly enters burner hearth Mi Xiang district and sulfur dioxide high temperature state fully react under secondary wind action from boiler both sides.
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| CN201310531657.6A CN103566751B (en) | 2013-11-01 | 2013-11-01 | A kind of fluidized-bed combustion boiler sulfur method and device thereof |
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| CN201310531657.6A CN103566751B (en) | 2013-11-01 | 2013-11-01 | A kind of fluidized-bed combustion boiler sulfur method and device thereof |
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| CN103566751A CN103566751A (en) | 2014-02-12 |
| CN103566751B true CN103566751B (en) | 2016-04-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104474880B (en) * | 2014-12-02 | 2016-09-14 | 成都华西堂投资有限公司 | A kind of realize the absorbent preprocess method that flue gas slightly purifies |
| CN104888599B (en) * | 2015-05-28 | 2017-02-01 | 上海三融环保工程有限公司 | Spray drying desulfurizer used for cement plant and process method |
| CN106247364A (en) * | 2016-08-29 | 2016-12-21 | 大唐清苑热电有限公司 | A kind of online limestone is to powder system |
| CN108826278A (en) * | 2018-07-04 | 2018-11-16 | 山西建邦集团铸造有限公司 | A kind of fluidized-bed combustion boiler gas conveying desulfurizer and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102210971A (en) * | 2010-04-07 | 2011-10-12 | 华盛江泉集团有限公司 | Circulating fluidized bed boiler desulfurizer |
| CN202263524U (en) * | 2011-10-14 | 2012-06-06 | 浙江宏宇环保工程设备有限公司 | In-furnace desulfurization device for high-efficiency desulfurization |
| CN102974211A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Circulating fluidized bed boiler in-furnace desulfurization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007191670A (en) * | 2006-01-20 | 2007-08-02 | Institute Of Strategy For Sustainable Solutions Co Ltd | System for producing alkaline soil-improving material, combined with flue-gas desulfurization |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102210971A (en) * | 2010-04-07 | 2011-10-12 | 华盛江泉集团有限公司 | Circulating fluidized bed boiler desulfurizer |
| CN202263524U (en) * | 2011-10-14 | 2012-06-06 | 浙江宏宇环保工程设备有限公司 | In-furnace desulfurization device for high-efficiency desulfurization |
| CN102974211A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Circulating fluidized bed boiler in-furnace desulfurization device |
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