CN204865475U - Coal -fired power plant boiler flue gas desulphurization device - Google Patents

Coal -fired power plant boiler flue gas desulphurization device Download PDF

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Publication number
CN204865475U
CN204865475U CN201520564582.6U CN201520564582U CN204865475U CN 204865475 U CN204865475 U CN 204865475U CN 201520564582 U CN201520564582 U CN 201520564582U CN 204865475 U CN204865475 U CN 204865475U
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CN
China
Prior art keywords
coal
desulfurizer
desulfurizing agent
flue gas
reactor
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CN201520564582.6U
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Chinese (zh)
Inventor
于遂影
高冠帅
郭波
王智
王大虎
郑立军
周兴野
李文颖
康壮
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辽宁中电投电站燃烧工程技术研究中心有限公司
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Priority to CN201520564582.6U priority Critical patent/CN204865475U/en
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Abstract

The utility model provides a coal -fired power plant boiler flue gas desulphurization device, desulfurizer in the feed bin with the help of compressed air with air mixing after the desulfurizer add in the ware spouts furnace, flue gas desulfurization reaction carries out one time, then the interior desulfurizer with being defeated by by the additional joining ware of desulfurizer of post -reactor that the entering bottom has venturi reducing pipe carries out secondary flue gas desulfurization reaction, it isolates to make its institute contain the desulfurizer that not participation reacts through cyclone at last, it recycles to be defeated by post -reactor through desulfurizer recoverer and the additional joining ware of desulfurizer. The device examines desulfurizer addition that measure and regulate saved post -reactor according to flue gas on -line monitoring appearance flue gas sulfur content to coal -fired coal strong adaptability when the coal sulfur content changes, makes device desulfurization effect best, but attend the desulfurizer recycle of reaction in the emission flue gas, the desulfurizer high -usage, little, construction investment of device area and running cost are low, both have been applicable to newly -built coal -fired unit boiler, are applicable to coal -fired unit boiler improvement again.

Description

A kind of coal-fired power station boiler flue gas desulfur device

Technical field

The present invention relates to boiler smoke process, particularly a kind of coal-fired power station boiler flue gas desulfur device.

Background technology

China take coal as the energy big country of primary raw material, especially in coal fired power generation field, due to a large amount of burning coals, causes the sulfur dioxide entered in air to increase.Sulfur dioxide is the major pollutants causing acid rain environment to pollute, and drastically influence the living environment of the mankind.CNS " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011), defines 100mg/Nm to newly-built coal fired power plant unit 3sO 2allow discharge maximum concentration limit value.

The sulfur method conventional for the sulfur dioxide in coal-fired power station boiler flue gas is divided into wet method and dry method two kinds.

Wet desulphurization take lime white as desulfurizing agent, and need comparatively complicated pulping system, floor space is larger; Desulfurizing agent sprays into as a slurry, and need use the wear resistant spray nozzle of special shape, spraying system easily blocks, and influential system normally runs; The concentration of slurry of whitewashing has a definite limitation, when coal-fired sulfur content is higher, need add more desulfurizing agent.

Dry desulfurization mostly adopts single desulfurization method at present, namely air compressor is utilized to spray into boiler furnace by adding device by desulfurizing agent after the desulfurizing agent be stored in feed bin (lime) and air mixing, in burner hearth, carry out desulphurization reaction, remove the sulfur dioxide in flue gas.This single desulfurizer is that the fire coal species determined according to boiler designs, boiler is only had to adopt the desulfurized effect that could play device during design coal preferably, when fire coal species sulfur content changes, if the sulfur content of coal is greater than design coal sulfur content, the desulphurizing ability of device is inadequate, and desulfurization degree reduces; If the sulfur content of coal is less than design coal sulfur content, the sorbent utilization of device reduces, and causes unnecessary waste.

Utility model content

The purpose of this utility model is that the defect existed for above-mentioned prior art provides that a kind of floor space is little, desulfurization degree is high, sorbent utilization is high, the adaptable coal-fired power station boiler flue gas desulfur device of fire coal species.

For achieving the above object, the coal-fired power station boiler flue gas desulfur device that the utility model provides, comprise the desulfurizing agent feed bin being provided with feed bin vibrator, desulfurizing agent feed bin connects with an entrance of air mixer with desulfurizing agent, desulfurizing agent connects with air compressor with another entrance of air mixer, and desulfurizing agent adds device with the outlet of air mixer by desulfurizing agent and connects with boiler furnace; Be characterized in, the exhanst gas outlet of boiler furnace connects with the bottom of bottom with the post-reactor of venturi reducing pipe, venturi reducing pipe sidepiece and desulfurizing agent supplement and add device and connect, the exhanst gas outlet of post-reactor is connected with the flue being provided with smoke gas on-line monitor by cyclone separator, and the discharging opening of cyclone separator is supplemented by desulfurizing agent recover and desulfurizing agent and adds device and connect.

Operation principle of the present utility model is:

Desulfurizing agent in feed bin is added device through desulfurizing agent after being mixed with air with air mixer by desulfurizing agent by the compressed air that air compressor provides and sprays in boiler furnace, once desulfurization reaction is carried out in burner hearth, for reacting fully and saving desulfurizing agent, the desulfurizing agent addition that device controls to spray in burner hearth is added by desulfurizing agent, the calcium to sulphur mole ratio making desulfurizing agent and sulfur dioxide in flue gas in burner hearth is 1.5, sloughs a part of sulfur dioxide.Flue gas after once desulfurization enters in post-reactor and carries out secondary desulfuration: supplemented by desulfurizing agent and add device and throw in a certain amount of desulfurizing agent according to the detection of smoke gas on-line monitor to post-reactor, these sorbent particles form gas-particle flow with the flue gas improving flow velocity through venturi reducing pipe, move up and down, height back-mixing, form Inner eycle, this special motion mode makes sorbent particle extended residence time in the reactor; Produce gas, solid two alternate Relative sliding speed simultaneously, accelerate gas, solid two alternate quality transmission, heat transmission, Momentum Transfer and chemical reaction, promote secondary desulfuration reaction.Complete in post-reactor the flue gas after secondary desulfuration by cyclone separator make not participate in contained by it reaction sorbent particle (with component loops ash) separate, fall into desulfurizing agent recover, by desulfurizing agent recover be defeated by desulfurizing agent supplement add device, be defeated by post-reactor participation desulphurization reaction by the supplementary device that adds of desulfurizing agent again, the utilization rate of device desulfurizing agent is improved.

Compared with existing dry desulfurization device, the utility model has the advantages that:

(1) when boiler fired coal coal sulfur content changes, according to the desulfurizing agent addition of the amount of sulfur contenting in smoke adjustment post-reactor that smoke gas on-line monitor detects, the desulfurization degree of adjusting apparatus, it is made to reach optimum value, enable device adapt to the coal type change of different sulfur content, expand the adaptability to the change of Coal rank sulfur content;

(2) device is to the recyclable recycling of desulfurizing agent of not participating in reaction in discharge flue gas, and sorbent utilization is high;

(3) little, the construction investment of this device plant area area and operating cost low, be both applicable to newly-built coal unit boiler, be applicable to again the transformation of coal unit boiler.

Accompanying drawing explanation

Fig. 1 is the utility model desulfurizer overall structure schematic diagram;

In figure: 1-desulfurizing agent feed bin, 2-feed bin vibrator, 3-air compressor, 4-desulfurizing agent and air mixer, 5-desulfurizing agent adds device, 6-boiler furnace, 7-post-reactor, 8-desulfurizing agent supplements and adds device, 9-desulfurizing agent recover, 10-cyclone separator, 11-smoke gas on-line monitor, 12-venturi reducing pipe.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described further.

As shown in Figure 1, the utility model coal-fired power station boiler flue gas desulfur device, before it, once desulfurization part-structure is same as the prior art, namely desulfurizing agent (dry lime) is housed in desulfurizing agent feed bin 1, lump for preventing desulfurizing agent, desulfurizing agent feed bin is provided with feed bin vibrator 2, desulfurizing agent feed bin connects with an entrance of air mixer 4 with desulfurizing agent, desulfurizing agent connects with air compressor 3 with another entrance of air mixer 4, desulfurizing agent adds device 5 with the outlet of air mixer 4 by desulfurizing agent and connects with boiler furnace 6, during work, the shower nozzle (not shown) adding device by desulfurizing agent after desulfurizing agent in feed bin is mixed with air with air mixer by desulfurizing agent by the compressed air that air compressor provides directly sprays in boiler furnace 6, once desulfurization reaction is carried out in burner hearth, slough part sulfur dioxide.Secondary desulfuration completes in the post-reactor 7 connected with boiler furnace 6 exhanst gas outlet, the bottom of post-reactor 7 is with venturi reducing pipe 12, the exhanst gas outlet of boiler furnace connects with the bottom of post-reactor 7, sidepiece and the desulfurizing agent of venturi reducing pipe 12 supplement the screw feeder (not shown) adding device 8 and connect, the exhanst gas outlet of post-reactor 7 is connected with flue by cyclone separator 10, the smoke gas on-line monitor 11 measuring SO 2 from fume content is housed in flue, the desulfurizing agent (with component loops ash) that flue gas after post-reactor secondary desulfuration does not participate in reaction contained by cyclone separator 10 is isolated falls into desulfurizing agent recover 9, by the screw feeder (not shown) of desulfurizing agent recover give desulfurizing agent supplement add device 8, supplement by desulfurizing agent the screw feeder (not shown) adding device 8 again and give post-reactor 7, participation secondary desulfuration reacts, the sorbent utilization of device is improved.

Claims (1)

1. a coal-fired power station boiler flue gas desulfur device, comprise the desulfurizing agent feed bin (1) being provided with feed bin vibrator (2), desulfurizing agent feed bin connects with an entrance of air mixer (4) with desulfurizing agent, desulfurizing agent connects with air compressor (3) with another entrance of air mixer (4), and desulfurizing agent adds device (5) with the outlet of air mixer (4) by desulfurizing agent and connects with boiler furnace (6); It is characterized in that: the exhanst gas outlet of boiler furnace (6) connects with the bottom of bottom with the post-reactor (7) of venturi reducing pipe (12), venturi reducing pipe (12) sidepiece and desulfurizing agent supplement and add device (8) and connect, the exhanst gas outlet of post-reactor (7) is connected with the flue being provided with smoke gas on-line monitor (11) by cyclone separator (10), and the discharging opening of cyclone separator (10) is by desulfurizing agent recover (9) and desulfurizing agent is supplementary adds device (8) and connect.
CN201520564582.6U 2015-07-31 2015-07-31 Coal -fired power plant boiler flue gas desulphurization device CN204865475U (en)

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Application Number Priority Date Filing Date Title
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106110869A (en) * 2016-08-30 2016-11-16 温州乐享科技信息有限公司 A kind of method removing sulfide in flue gas
CN106122993A (en) * 2016-08-30 2016-11-16 温州乐享科技信息有限公司 A kind of coal combustion process of clean environment firendly
CN106178855A (en) * 2016-08-30 2016-12-07 温州乐享科技信息有限公司 A kind of sulfur method of flue gas
CN106178868A (en) * 2016-08-30 2016-12-07 温州乐享科技信息有限公司 A kind of method reducing sulfide in flue gas content
CN106237829A (en) * 2016-08-30 2016-12-21 温州乐享科技信息有限公司 For the method removing sulfide in flue gas
CN106322423A (en) * 2016-08-30 2017-01-11 温州乐享科技信息有限公司 Clean and environment-friendly coal combusting method
CN106345267A (en) * 2016-08-30 2017-01-25 温州乐享科技信息有限公司 Method for flue gas desulfurization
CN106382648A (en) * 2016-12-05 2017-02-08 温州乐享科技信息有限公司 Coal combustion method
CN106377996A (en) * 2016-08-30 2017-02-08 温州乐享科技信息有限公司 Flue gas desulphurization method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106110869A (en) * 2016-08-30 2016-11-16 温州乐享科技信息有限公司 A kind of method removing sulfide in flue gas
CN106122993A (en) * 2016-08-30 2016-11-16 温州乐享科技信息有限公司 A kind of coal combustion process of clean environment firendly
CN106178855A (en) * 2016-08-30 2016-12-07 温州乐享科技信息有限公司 A kind of sulfur method of flue gas
CN106178868A (en) * 2016-08-30 2016-12-07 温州乐享科技信息有限公司 A kind of method reducing sulfide in flue gas content
CN106237829A (en) * 2016-08-30 2016-12-21 温州乐享科技信息有限公司 For the method removing sulfide in flue gas
CN106322423A (en) * 2016-08-30 2017-01-11 温州乐享科技信息有限公司 Clean and environment-friendly coal combusting method
CN106345267A (en) * 2016-08-30 2017-01-25 温州乐享科技信息有限公司 Method for flue gas desulfurization
CN106377996A (en) * 2016-08-30 2017-02-08 温州乐享科技信息有限公司 Flue gas desulphurization method
CN106382648A (en) * 2016-12-05 2017-02-08 温州乐享科技信息有限公司 Coal combustion method

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Granted publication date: 20151216

Termination date: 20180731