CN102794103A - Double circulation U-shaped tower desulfurization system and process - Google Patents

Double circulation U-shaped tower desulfurization system and process Download PDF

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Publication number
CN102794103A
CN102794103A CN2012103227516A CN201210322751A CN102794103A CN 102794103 A CN102794103 A CN 102794103A CN 2012103227516 A CN2012103227516 A CN 2012103227516A CN 201210322751 A CN201210322751 A CN 201210322751A CN 102794103 A CN102794103 A CN 102794103A
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China
Prior art keywords
circulation
desulfurization
tower
back
oxidation pond
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CN2012103227516A
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Chinese (zh)
Inventor
唐小健
但康
杨斌懿
赵培超
胡萍
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中电投远达环保工程有限公司
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Priority to CN2012103227516A priority Critical patent/CN102794103A/en
Publication of CN102794103A publication Critical patent/CN102794103A/en

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Abstract

The invention discloses a double circulation U-shaped tower desulfurization system and a process. According to the double circulation U-shaped tower desulfurization system, a slurry separation wall is arranged in a slurry pond of a U-shaped desulfurization tower to divide the slurry pond into a front circulation neutralization and oxidization pond and a rear circulation neutralization and oxidization pond, and meanwhile, a front circulation desulfurization region and a rear circulation desulfurization region which are mutually independent are arranged, wherein a front circulation desulfurization system is jointly formed by the front circulation neutralization and oxidization pond, a front circulation pump and the front circulation desulfurization region, and a circulation desulfurization system is jointly formed by the rear circulation neutralization and oxidization pond, a rear circulation pump and the rear circulation desulfurization region; and the double circulation desulfurization system which is relatively independent is formed in the U-shaped desulfurization tower, and the desulfurization of smoke is jointly finished by the double circulation desulfurization system. According to the double circulation U-shaped tower desulfurization system, higher desulfurization efficiency is not only guaranteed, but also the slurry circulation quantity and the system energy consumption are reduced, the height of the desulfurization tower is also reduced due to the overall layout of the U-shaped desulfurization tower, and the double circulation desulfurization system is simplified. The double circulation U-shaped tower desulfurization system is particularly suitable for desulfurizing smoke generated by burning high-sulfur coal, and the desulfurization efficiency can reach higher than 99 percent.

Description

Two circulation U type tower desulphurization systems and technology

Technical field

The present invention relates to a kind of flue gas desulfurization technique, be specifically related to a kind of pair of circulation U type tower desulphurization system and technology.

Background technology

The SO of up-to-date thermal power plant's atmosphere pollutants emission standards (GB 13223-2011) 2Emission limit improves bigger, generally requires at 100mg/N m 3In, the local area requires 50mg/Nm 3

Emission request can be satisfied fully in the low-sulfur coal area in mainly the operating in of present single cycle desulfurizing tower system.To part sulphur coal area, require desulfuration efficiency to reach more than 98%, even require to satisfy emission request more than 99%; Utilize single cycle desulfurizing tower system will satisfy emission request; Desulfurizing tower will be very high, and energy consumption just has to a desulfurizing tower is divided into two desulfurizing tower series operations also than higher sometimes; But the series connection of two desulfurizing towers is taken up an area of, investment is very big, is unfavorable for the high-efficiency and economic operation.

Therefore, under the up-to-date discharge standard of national requirements, be necessary very much to develop the desulfur technology of high-efficiency low energy consumption,, better living space arranged to the mankind to satisfy requirement on environmental protection.

Summary of the invention

In view of this, the invention provides a kind of pair of circulation U type tower desulphurization system and technology, can when satisfying desulfuration efficiency, reduce system energy consumption, practice thrift investment, take up an area of, reach the up-to-date discharge standard of national requirements again.

The invention discloses a kind of pair of circulation U type tower desulphurization system, comprise U type desulfurizing tower, the top of said U type desulfurizing tower is following current tower and the countercurrent tower of separating each other; The following current tower is provided with smoke inlet; Countercurrent tower is provided with exhanst gas outlet, and the bottom of U type desulfurizing tower is the slurries pond, and said slurries are provided with the slurries divider wall in the pond; The slurries divider wall is divided in the preceding circulation of following current tower the slurries pond with oxidation pond with in the back circulation of countercurrent tower and oxidation pond; Slurries divider wall top is for being communicated with the exhaust gases passes of following current tower and countercurrent tower, and circulation desulfurization district before being provided with in the said following current tower is provided with circulation desulfurization district, back in the countercurrent tower; Be communicated with preceding circulation desulfurization district through preceding circulating pump with oxidation pond in the circulation before said, be communicated with circulation desulfurization district, back through the back circulating pump with oxidation pond in the circulation of back.

Further, top, preceding circulation desulfurization district is provided with and does wet interface rinse-system in the said following current tower, and top, circulation desulfurization district, back is provided with demister in the said countercurrent tower.

Further, also be communicated with preceding cyclic oxidation air system with oxidation pond in the said preceding circulation, also be communicated with back cyclic oxidation air system with oxidation pond in circulating in said back.

Further, also be communicated with the desulfurizing agent replenishment system with oxidation pond in the circulation of said back, also be communicated with the plasma discharge system with oxidation pond in the said preceding circulation.

Further, before said in the circulation with oxidation pond and back circulation in oxidation pond on be respectively equipped with agitator.

Further, said U type desulfurizing tower is a U type squarer.

The invention also discloses the sulfur removal technology that uses above-mentioned pair of circulation U type tower desulphurization system, former flue gas gets into U type desulfurizing tower, the desulfurization slurry absorbing and removing SO that in preceding circulation desulfurization district, is provided by preceding circulating pump then from smoke inlet 2, desulfurization slurry absorbs SO 2After fall into before the circulation and oxidation pond in; Clean flue gas after preceding circulation desulfurization district handles gets into circulation desulfurization district, back from the exhaust gases passes on slurries divider wall top, the further absorbing and removing SO of desulfurization slurry that in circulation desulfurization district, back, is provided by the back circulating pump then 2, desulfurization slurry absorbs SO 2After fall in back circulation and the oxidation pond; Through after the clean flue gas of circulation desulfurization district after handling discharge U type desulfurizing tower from exhanst gas outlet.

Further, absorb SO 2After fall into before circulation provide oxygen to carry out oxidation reaction with desulfurization slurry in the oxidation pond by preceding cyclic oxidation air system, generation sulfate and crystallization; Absorb SO 2After fall into back circulation and provide oxygen to carry out oxidation reaction by back cyclic oxidation air system, generation sulfate with desulfurization slurry in the oxidation pond.

Further; The desulfurizing agent replenishment system is supplemented to desulfurizing agent in the circulation of back and in the oxidation pond; Overflow in the preceding circulation and in the oxidation pond with the interior desulfurization slurry of oxidation pond in circulating in the back, handle after the discharge of plasma discharge system with the interior crystalline sulfuric acid salt of oxidation pond in the preceding circulation.

Further, in the preceding circulation with oxidation pond in the desulfurization slurry pH value be 5 ~ 5.6, in the back circulation with oxidation pond in the desulfurization slurry pH value be 5.6 ~ 6.3, in the preceding circulation with oxidation pond and back circulation in oxidation pond in the desulfurization slurry mass concentration be 13% ~ 32%.

Beneficial effect of the present invention is: the present invention is provided with the slurries divider wall in the slurries pond of U type desulfurizing tower; Before the slurries pond is divided in the circulation with oxidation pond and back circulation in and oxidation pond; Separate preceding circulation desulfurization district and circulation desulfurization district, back are set simultaneously; Form preceding circulation desulfurization system jointly with oxidation pond, preceding circulating pump and preceding circulation desulfurization district in the preceding circulation; Form back circulation desulfurization system jointly with oxidation pond, back circulating pump and circulation desulfurization district, back in the circulation of back, in a U type desulfurizing tower, form relatively independent double circulation desulphurization system, the desulfurization of flue gas is accomplished by the double circulation desulphurization system jointly.

The relatively independent operation of double circulation desulphurization system of the present invention; Both guaranteed higher desulfuration efficiency, and reduced slurries internal circulating load and system energy consumption again, and U type desulfurizing tower entire arrangement has also reduced the desulfurizing tower height; Simplify the system of double circulation desulphurization, practiced thrift investment; The present invention's flue gas desulfurization that sulphur coal produces that is particularly suitable for burning, desulfuration efficiency can reach more than 99%.

Description of drawings

In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:

Fig. 1 is a structural representation of the present invention.

The specific embodiment

Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.

Fig. 1 is structural representation of the present invention, and is as shown in the figure, of the present invention pair of circulation U type tower desulphurization system; Comprise U type desulfurizing tower 1; The top of said U type desulfurizing tower 1 is the following current tower of separating each other 2 and countercurrent tower 3, and following current tower 2 is provided with smoke inlet 4, and countercurrent tower 3 is provided with exhanst gas outlet 5; The bottom of U type desulfurizing tower 1 is the slurries pond; Said slurries are provided with slurries divider wall 6 in the pond, slurries divider wall 6 with the slurries pond be divided in the preceding circulation of following current tower 2 with oxidation pond 7 and in the back circulation of countercurrent tower 3 with oxidation pond 8, slurries divider wall 6 tops are for being communicated with the exhaust gases passes 9 of following current tower 2 and countercurrent tower 3; Circulation desulfurization district 10 before being provided with in the said following current tower 2; Circulation desulfurization district, back 11 is set in the countercurrent tower 3, is communicated with preceding circulation desulfurization district 10 through preceding circulating pump 12 with oxidation pond 7 in the said preceding circulation, be communicated with circulation desulfurization district, back 11 through back circulating pump 13 with oxidation pond 8 in circulating in the back; Form preceding circulation desulfurization system jointly with oxidation pond 7, preceding circulating pump 12 and preceding circulation desulfurization district 10 in the preceding circulation; In the back circulation with oxidation pond 8, back circulating pump 13 and circulation desulfurization district, the back 11 common back circulation desulfurization systems that form; In a U type desulfurizing tower 1, form relatively independent double circulation desulphurization system; The desulfurization of flue gas is accomplished by the double circulation desulphurization system jointly, but the relatively independent operation of double circulation desulphurization system.

In the present embodiment, 10 tops, preceding circulation desulfurization district are provided with and do wet interface rinse-system 14 in the said following current tower 2, and 11 tops, circulation desulfurization district, back are provided with demister 15 in the said countercurrent tower 3.

In the present embodiment, also be communicated with preceding cyclic oxidation air system 16 with oxidation pond 7 in the said preceding circulation, also be communicated with back cyclic oxidation air system 17 with oxidation pond 8 in circulating in said back; Preceding cyclic oxidation air system 16 can be the thatch rifle with the oxidation air cloth air port of back cyclic oxidation air system 17, also can be flat other form that waits of inserting.

In the present embodiment, also be communicated with desulfurizing agent replenishment system 18 with oxidation pond 8 in the circulation of said back, also be communicated with plasma discharge system 19 with oxidation pond 7 in the said preceding circulation.

In the present embodiment, said before in the circulation with oxidation pond 7 and back circulation in oxidation pond 8 on be respectively equipped with agitator (being respectively agitator 20 and agitator 21 among the figure); The alr mode of agitator can be that impeller stirs, and also can be that the flow-disturbing stirring waits other alr mode; The agitator major function is to prevent deposition, oxidation reinforced effect.

In the present embodiment, said U type desulfurizing tower 1 is a U type squarer; The structure optimization U type squarer of U type desulfurizing tower 1, but also can be various possible combinations or modes of texturing such as U type circular tower or U type circumference tower.

Among the present invention, demister 15 can be dull and stereotyped or chevron shaped fixed board-like demister, also can be that the combination of wet electrical dust precipitator or fixed board-like demister and wet electrical dust precipitator waits other form; Preceding circulation desulfurization district 10 absorbs with the preferred fluid column of absorpting form (or liquid curtain) in circulation desulfurization district, back 11, but also can be various possible forms such as spray+fluid column (or liquid curtain) or the absorption of spray+spray.

Use the sulfur removal technology of of the present invention pair of circulation U type tower desulphurization system; Former flue gas gets into U type desulfurizing tower 1 from smoke inlet 4; Circulation desulfurization district 10 before after doing wet interface rinse-system 14, getting into, the desulfurization slurry absorbing and removing SO that in preceding circulation desulfurization district 10, is provided then by preceding circulating pump 12 2, desulfurization slurry absorbs SO 2After fall into before the circulation and oxidation pond 7 in; Clean flue gas after preceding circulation desulfurization district 10 handles gets into circulation desulfurization district, back 11 from the exhaust gases passes 9 on slurries divider wall 6 tops, the further absorbing and removing SO of desulfurization slurry that in circulation desulfurization district, back 11, is provided by back circulating pump 13 then 2, desulfurization slurry absorbs SO 2After fall in back circulation and the oxidation pond 8; Through after after the circulation desulfurization district 11 clean flue gas after handling gets into demister 15 demist dedustings, discharge U type desulfurizing towers 1 from exhanst gas outlet 5.

Absorb SO 2After fall into before circulation provide oxygen to carry out oxidation reaction with desulfurization slurries in the oxidation pond 7 by preceding cyclic oxidation air system 16, generation sulfate and crystallization; Absorb SO 2After fall into back circulation and provide oxygen to carry out oxidation reaction by back cyclic oxidation air system 17, generation sulfate with desulfurization slurries in the oxidation pond 8.

Desulfurizing agent replenishment system 18 is supplemented in the circulation of back desulfurizing agent with (it can be to replenish with the slurries form that desulfurizing agent replenishes in the oxidation pond 8; Also can be to replenish) with other forms such as powders; Overflow in the preceding circulation and in the oxidation pond 7 with oxidation pond 8 interior desulfurization slurries in circulating in the back, handle after 19 discharges of plasma discharge system with oxidation pond 7 interior crystalline sulfuric acid salt in the preceding circulation.

Before in the circulation with oxidation pond 7 in the desulfurization slurry pH values be 5 ~ 5.6, help sulphate crystal, liquid level is in the low level operation; In the back circulation with oxidation pond 8 in the desulfurization slurry pH values be 5.6 ~ 6.3, help improving desulfuration efficiency, reduce liquid-gas ratio, reduce back circulating pump energy consumption, liquid level is in high-order operation; Before in the circulation with oxidation pond 7 and back circulation in oxidation pond 8 in the desulfurization slurry mass concentrations be 13% ~ 32%; Said desulfurization slurry is processed by calcium base or Mg-base desulfurizing agent.

Among the present invention; The desulfurization of flue gas is accomplished by the double circulation desulphurization system jointly, and the relatively independent operation of double circulation desulphurization system had both guaranteed higher desulfuration efficiency; Slurries internal circulating load and system energy consumption have been reduced again; And U type desulfurizing tower entire arrangement has also reduced the desulfurizing tower height, has simplified the system of double circulation desulphurization, has practiced thrift investment; The present invention's flue gas desulfurization that sulphur coal produces that is particularly suitable for burning, desulfuration efficiency can reach more than 99%.

Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although through invention has been described with reference to the preferred embodiments of the present invention; But those of ordinary skill in the art should be appreciated that and can make various changes to it in form with on the details, and the spirit and scope of the present invention that do not depart from appended claims and limited.

Claims (10)

1. a two circulation U type tower desulphurization system comprises U type desulfurizing tower, and the top of said U type desulfurizing tower is following current tower and the countercurrent tower of separating each other; The following current tower is provided with smoke inlet; Countercurrent tower is provided with exhanst gas outlet, and the bottom of U type desulfurizing tower is the slurries pond, it is characterized in that: said slurries are provided with the slurries divider wall in the pond; The slurries divider wall is divided in the preceding circulation of following current tower the slurries pond with oxidation pond with in the back circulation of countercurrent tower and oxidation pond; Slurries divider wall top is for being communicated with the exhaust gases passes of following current tower and countercurrent tower, and circulation desulfurization district before being provided with in the said following current tower is provided with circulation desulfurization district, back in the countercurrent tower; Be communicated with preceding circulation desulfurization district through preceding circulating pump with oxidation pond in the circulation before said, be communicated with circulation desulfurization district, back through the back circulating pump with oxidation pond in the circulation of back.
2. according to claim 1 pair of circulation U type tower desulphurization system is characterized in that: top, circulation desulfurization district is provided with and does wet interface rinse-system before in the said following current tower, and top, circulation desulfurization district, back is provided with demister in the said countercurrent tower.
3. based on described couple of circulation U of claim 1 type tower desulphurization system, it is characterized in that: also be communicated with preceding cyclic oxidation air system with oxidation pond in the circulation before said, also be communicated with back cyclic oxidation air system with oxidation pond in the circulation of said back.
4. according to claim 1 pair of circulation U type tower desulphurization system is characterized in that: also be communicated with the desulfurizing agent replenishment system with oxidation pond in the circulation of said back, also be communicated with the plasma discharge system with oxidation pond in the said preceding circulation.
5. based on described couple of circulation U of claim 1 type tower desulphurization system, it is characterized in that: be respectively equipped with agitator in the circulation and in oxidation pond and the back circulation with on the oxidation pond before said.
6. according to claim 1 pair of circulation U type tower desulphurization system, it is characterized in that: said U type desulfurizing tower is a U type squarer.
7. use the sulfur removal technology of any one the described pair circulation U type tower desulphurization system of claim 1 to 6, it is characterized in that: former flue gas gets into U type desulfurizing tower, the desulfurization slurry absorbing and removing SO that in preceding circulation desulfurization district, is provided by preceding circulating pump then from smoke inlet 2, desulfurization slurry absorbs SO 2After fall into before the circulation and oxidation pond in; Clean flue gas after preceding circulation desulfurization district handles gets into circulation desulfurization district, back from the exhaust gases passes on slurries divider wall top, the further absorbing and removing SO of desulfurization slurry that in circulation desulfurization district, back, is provided by the back circulating pump then 2, desulfurization slurry absorbs SO 2After fall in back circulation and the oxidation pond; Through after the clean flue gas of circulation desulfurization district after handling discharge U type desulfurizing tower from exhanst gas outlet.
8. sulfur removal technology according to claim 7 is characterized in that: absorb SO 2After fall into before circulation provide oxygen to carry out oxidation reaction with desulfurization slurry in the oxidation pond by preceding cyclic oxidation air system, generation sulfate and crystallization; Absorb SO 2After fall into back circulation and provide oxygen to carry out oxidation reaction by back cyclic oxidation air system, generation sulfate with desulfurization slurry in the oxidation pond.
9. sulfur removal technology according to claim 8; It is characterized in that: the desulfurizing agent replenishment system is supplemented to desulfurizing agent in the circulation of back and in the oxidation pond; Overflow in the preceding circulation and in the oxidation pond with the interior desulfurization slurry of oxidation pond in circulating in the back, handle after the discharge of plasma discharge system with the interior crystalline sulfuric acid salt of oxidation pond in the preceding circulation.
10. sulfur removal technology according to claim 9; It is characterized in that: in the preceding circulation with oxidation pond in the desulfurization slurry pH value be 5 ~ 5.6; In the back circulation with oxidation pond in the desulfurization slurry pH value be 5.6 ~ 6.3, in the preceding circulation with oxidation pond and back circulation in oxidation pond in the desulfurization slurry mass concentration be 13% ~ 32%.
CN2012103227516A 2012-09-04 2012-09-04 Double circulation U-shaped tower desulfurization system and process CN102794103A (en)

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CN104174283A (en) * 2014-09-10 2014-12-03 北京国能中电节能环保技术有限责任公司 Bicirculating desulfuration system
CN104607007A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607011A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607010A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607008A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607020A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607019A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104722192A (en) * 2015-02-12 2015-06-24 西安西热锅炉环保工程有限公司 Efficient dual-circular turn-back absorption tower
CN104722194A (en) * 2015-03-19 2015-06-24 永清环保股份有限公司 Deep flue gas purification device for efficient desulphurization and dust removal
CN104874283A (en) * 2015-06-15 2015-09-02 重庆广播电视大学 Desulfurizing tower
CN104941434A (en) * 2015-06-15 2015-09-30 重庆广播电视大学 Flue gas purifying device
CN105013314A (en) * 2015-06-15 2015-11-04 重庆广播电视大学 Flue gas filtration column
CN105536446A (en) * 2016-03-08 2016-05-04 攀钢集团攀枝花钢钒有限公司 Gas-liquid cocurrent type waste gas absorption treatment system and method
CN105597506A (en) * 2015-11-26 2016-05-25 攀钢集团攀枝花钢钒有限公司 Waste gas treatment system
CN110404394A (en) * 2019-09-25 2019-11-05 山东润扬环保设备有限公司 Ultraviolet catalytic oxidation-Fenton high efficiency composition organic waste gas treatment device and method

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CN104607007A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607011A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607010A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607008A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607020A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607019A (en) * 2013-11-05 2015-05-13 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607011B (en) * 2013-11-05 2017-01-11 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607010B (en) * 2013-11-05 2017-02-08 中国石油化工股份有限公司 Flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607007B (en) * 2013-11-05 2017-02-01 中国石油化工股份有限公司 Flue gas dust removal desulfurization reactor and flue gas desulfurization method
CN104607008B (en) * 2013-11-05 2017-01-11 中国石油化工股份有限公司 Double-circulating flue gas dust removal desulfurization tower and flue gas desulfurization method
CN104607019B (en) * 2013-11-05 2017-10-27 中国石油化工股份有限公司 Two-way Cycle flue-gas dust-removing and desulfurization reactor and fume desulphurization method
CN104174283A (en) * 2014-09-10 2014-12-03 北京国能中电节能环保技术有限责任公司 Bicirculating desulfuration system
CN104722192A (en) * 2015-02-12 2015-06-24 西安西热锅炉环保工程有限公司 Efficient dual-circular turn-back absorption tower
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CN104941434A (en) * 2015-06-15 2015-09-30 重庆广播电视大学 Flue gas purifying device
CN104874283A (en) * 2015-06-15 2015-09-02 重庆广播电视大学 Desulfurizing tower
CN105597506A (en) * 2015-11-26 2016-05-25 攀钢集团攀枝花钢钒有限公司 Waste gas treatment system
CN105597506B (en) * 2015-11-26 2018-01-12 攀钢集团攀枝花钢钒有限公司 Exhaust treatment system
CN105536446A (en) * 2016-03-08 2016-05-04 攀钢集团攀枝花钢钒有限公司 Gas-liquid cocurrent type waste gas absorption treatment system and method
CN110404394A (en) * 2019-09-25 2019-11-05 山东润扬环保设备有限公司 Ultraviolet catalytic oxidation-Fenton high efficiency composition organic waste gas treatment device and method

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