CN202762303U - Desulfurization system of bi-circulating U-shaped tower - Google Patents
Desulfurization system of bi-circulating U-shaped tower Download PDFInfo
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- CN202762303U CN202762303U CN201220446704.8U CN201220446704U CN202762303U CN 202762303 U CN202762303 U CN 202762303U CN 201220446704 U CN201220446704 U CN 201220446704U CN 202762303 U CN202762303 U CN 202762303U
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Abstract
The utility model discloses a desulfurization system of a bi-circulating U-shaped tower. A slurry separating wall is arranged in a slurry pool of a U-shaped desulfurization tower, the slurry pool is divided into a front circulation neutralization oxidation pool and a rear circulation neutralization oxidation pool, simultaneously a front circulation desulfurization zone and a rear circulation desulfurization zone are arranged independently, a front circulation desulfurization system is formed by the front circulation neutralization oxidation pool, a front circulation pump and the front circulation desulfurization zone commonly, a rear circulation desulfurization system is formed by the rear circulation neutralization oxidation pool, a rear circulation pump and the rear circulation desulfurization zone commonly, a relatively independent bi-circulating desulfurization system is formed in the U-shaped desulfurization tower, and desulfurization of flue gas is finished by the bi-circulating desulfurization system commonly. The desulfurization system of the bi-circulating U-shaped tower guarantees high desulfurization efficiency and reduces slurry circulation volume and system energy consumption. The U-shaped desulfurization tower is arranged entirely, height of the desulfurization tower is lowered, and the bi-circulating desulfurization system is simplified. The desulfurization system of the bi-circulating U-shaped tower is particularly suitable for desulfurization of flue gas generated by burning high-sulphur coal, and desulfurization efficiency can reach above 99%.
Description
Technical field
The utility model relates to a kind of flue gas desulfurization technique, is specifically related to the U-shaped tower desulphurization system of a kind of two circulations.
Background technology
The SO of up-to-date fossil-fuel power plant atmospheric pollutant emission standard (GB 13223-2011)
2Emission limit improves larger, and General Requirements is at 100mg/N m
3In, the local area requires 50mg/Nm
3
Present single cycle desulfurizing tower system mainly operates in middle low-sulfur coal area, can satisfy emission request fully.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 is also higher, sometimes just has to a desulfurizing tower is divided into two desulfurizing tower series operations, but the series connection of two desulfurizing towers is taken up an area, investment is very large, 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, to satisfy the requirement of environmental protection, to the mankind better living space arranged.
Summary of the invention
In view of this, the utility model provides a kind of two circulations U-shaped tower desulphurization system, can reduce system energy consumption when satisfying desulfuration efficiency, saves investment, takes up an area, and reaches again the up-to-date discharge standard of national requirements.
The U-shaped tower desulphurization system of two circulations of the present utility model, comprise U-shaped desulfurizing tower, the top of described U-shaped desulfurizing tower is following current tower and the countercurrent tower of mutually separating, the following current tower is provided with smoke inlet, countercurrent tower is provided with exhanst gas outlet, the bottom of U-shaped desulfurizing tower is slurry pool, be provided with the slurries divider wall in the described slurry pool, the slurries divider wall is divided into slurry pool in the front circulation of following current tower and oxidation pond and in the rear 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, front circulation desulfurization district is set in the described following current tower, rear circulation desulfurization district is set in the countercurrent tower, be communicated with front circulation desulfurization district by front circulating pump with oxidation pond in the described front circulation, be communicated with rear circulation desulfurization district by rear circulating pump with oxidation pond in the rear circulation.
Further, top, front circulation desulfurization district is provided with and does wet interface rinse-system in the described following current tower, and top, circulation desulfurization district was provided with demister after described countercurrent tower was interior.
Further, also be communicated with front cyclic oxidation air system with oxidation pond in the described front circulation, also be communicated with rear cyclic oxidation air system with oxidation pond in the described rear circulation.
Further, also be communicated with the desulfurizing agent replenishment system with oxidation pond in the described rear circulation, also be communicated with the plasma discharge system with oxidation pond in the described front circulation.
Further, be respectively equipped with agitator in the described front circulation and in oxidation pond and the rear circulation and on the oxidation pond.
Further, described U-shaped desulfurizing tower is U-shaped squarer.
The beneficial effects of the utility model are: the utility model arranges the slurries divider wall in the slurry pool of U-shaped desulfurizing tower, slurry pool is divided in the front circulation and oxidation pond and rear circulation in and oxidation pond, separate front circulation desulfurization district and rear circulation desulfurization district are set simultaneously, in the front circulation and oxidation pond, circulation desulfurization system before the common formation in front circulating pump and front circulation desulfurization district, in the rear circulation and oxidation pond, circulation desulfurization system after the common formation in rear circulating pump and rear circulation desulfurization district, form relatively independent double circulation desulphurization system in a U-shaped desulfurizing tower, the desulfurization of flue gas is finished jointly by the double circulation desulphurization system.
The relatively independent operation of double circulation desulphurization system of the present utility model, both guaranteed higher desulfuration efficiency, and reduced again slurries internal circulating load and system energy consumption, and U-shaped desulfurizing tower integral arrangement has also reduced the desulfurizing tower height, simplify the system of double circulation desulphurization, saved investment; The utility model 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 purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.
Fig. 1 is structural representation of the present utility model, as shown in the figure, the U-shaped tower desulphurization system of two circulations of the present utility model, comprise U-shaped desulfurizing tower 1, the top of described U-shaped desulfurizing tower 1 is following current tower 2 and the countercurrent tower 3 of mutually separating, following current tower 2 is provided with smoke inlet 4, countercurrent tower 3 is provided with exhanst gas outlet 5, the bottom of U-shaped desulfurizing tower 1 is slurry pool, be provided with slurries divider wall 6 in the described slurry pool, slurries divider wall 6 is divided into slurry pool in the front circulation of following current tower 2 and oxidation pond 7 and in the rear circulation of countercurrent tower 3 and 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, the described following current tower 2 interior front circulation desulfurization districts 10 that arrange, the countercurrent tower 3 interior rear circulation desulfurization districts 11 that arrange, be communicated with front circulation desulfurization district 10 by front circulating pump 12 with oxidation pond 7 in the described front circulation, be communicated with rear circulation desulfurization district 11 by rear circulating pump 13 with oxidation pond 8 in the rear circulation; Circulation desulfurization system before in the front circulation and oxidation pond 7, front circulating pump 12 and front circulation desulfurization district 10 forms jointly, circulation desulfurization system after in the rear circulation and oxidation pond 8, rear circulating pump 13 and rear circulation desulfurization district 11 forms jointly, a relatively independent double circulation desulphurization system of U-shaped desulfurizing tower 1 interior formation, the desulfurization of flue gas is finished jointly by the double circulation desulphurization system, but the relatively independent operation of double circulation desulphurization system.
In the present embodiment, 10 tops, described following current tower 2 interior front circulation desulfurization districts are provided with does wet interface rinse- system 14, and 11 tops, described countercurrent tower 3 interior rear circulation desulfurization districts are provided with demister 15.
In the present embodiment, also be communicated with front cyclic oxidation air system 16 with oxidation pond 7 in the described front circulation, also be communicated with rear cyclic oxidation air system 17 with oxidation pond 8 in the described rear circulation; The oxidation air cloth air port of front cyclic oxidation air system 16 and rear cyclic oxidation air system 17 can be the thatch rifle, also can be other forms such as plug flat.
In the present embodiment, also be communicated with desulfurizing agent replenishment system 18 with oxidation pond 8 in the described rear circulation, also be communicated with plasma discharge system 19 with oxidation pond 7 in the described front circulation.
In the present embodiment, be respectively equipped with agitator (being respectively agitator 20 and agitator 21 among the figure) in the described front circulation and in oxidation pond 7 and the rear circulation and on the oxidation pond 8; The agitating mode of agitator can be that impeller stirs, and also can be other agitating modes such as flow-disturbing stirring; The agitator major function is to prevent precipitation, oxidation reinforced effect.
In the present embodiment, described U-shaped desulfurizing tower 1 is U-shaped squarer; The preferred U-shaped squarer of the structure of U-shaped desulfurizing tower 1, but also can be various possible combinations or the modes of texturing such as U-shaped circular tower or U-shaped circumference tower.
In the utility model, demister 15 can be dull and stereotyped or chevron shaped fixed board-like demister, also can be other forms such as combination of wet electrical dust precipitator or fixed board-like demister and wet electrical dust precipitator; The preferred fluid column of absorpting form (or liquid curtain) in front circulation desulfurization district 10 and rear circulation desulfurization district 11 absorbs, but also can be the various possible forms such as spray+fluid column (or liquid curtain) or spray+spray-absorption.
Use the sulfur removal technology of the U-shaped tower desulphurization system of two circulations of the present utility model, former flue gas enters U-shaped desulfurizing tower 1 from smoke inlet 4, after doing wet interface rinse-system 14, enter front circulation desulfurization district 10, then the 10 interior desulfurization slurry absorbing and removing SO that provided by front circulating pump 12 in front circulation desulfurization district
2, desulfurization slurry absorbs SO
2After fall in front circulation and the oxidation pond 7; Circulation desulfurization district 11, the then 11 interior further absorbing and removing SO of desulfurization slurry that provided by rear circulating pump 13 in rear circulation desulfurization district after clean flue gas after front circulation desulfurization district 10 processes enters from the exhaust gases passes 9 on slurries divider wall 6 tops
2, desulfurization slurry absorbs SO
2After fall in rear circulation and the oxidation pond 8; Through after after the circulation desulfurization district 11 clean flue gas after processing enters demister 15 demist dedustings, discharge U-shaped desulfurizing tower 1 from exhanst gas outlet 5.
Absorb SO
2After the desulfurization slurries that fall in front circulation and the oxidation pond 7 provide oxygen to carry out oxidation reaction by front cyclic oxidation air system 16, generate sulfate and crystallization; Absorb SO
2After the desulfurization slurries that fall in rear circulation and the oxidation pond 8 provide oxygen to carry out oxidation reaction by rear cyclic oxidation air system 17, generate sulfate.
Desulfurizing agent replenishment system 18 is supplemented in the rear circulation 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), in the rear circulation and the desulfurization slurries in the oxidation pond 8 overflow in the front circulation and oxidation pond 7 in, in the front circulation and the crystalline sulfuric acid salt in the oxidation pond 7 after plasma discharge system 19 discharges, process.
In the front circulation and the desulfurization slurry pH values in the oxidation pond 7 be 5 ~ 5.6, be conducive to sulphate crystal, liquid level is in the low level operation; In the rear circulation and the desulfurization slurry pH values in the oxidation pond 8 be 5.6 ~ 6.3, be conducive to improve desulfuration efficiency, reduce liquid-gas ratio, circulating pump energy consumption after reducing, liquid level is in run at high level; In the front circulation and in oxidation pond 7 and the rear circulation and the desulfurization slurry mass concentrations in the oxidation pond 8 be 13% ~ 32%; Described desulfurization slurry is made by calcium base or Mg-base desulfurizing agent.
In the utility model, the desulfurization of flue gas is finished jointly by the double circulation desulphurization system, the relatively independent operation of double circulation desulphurization system, both guaranteed higher desulfuration efficiency, slurries internal circulating load and system energy consumption have been reduced again, and U-shaped desulfurizing tower integral arrangement has also reduced the desulfurizing tower height, has simplified the system of double circulation desulphurization, has saved investment; The utility model 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 the technical solution of the utility model to be described, although by the utility model being described with reference to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, can make various changes to it in the form and details, and not depart from the spirit and scope of the present utility model that appended claims limits.
Claims (6)
1. U-shaped tower desulphurization system of two circulations, comprise U-shaped desulfurizing tower, the top of described U-shaped desulfurizing tower is following current tower and the countercurrent tower of mutually separating, the following current tower is provided with smoke inlet, countercurrent tower is provided with exhanst gas outlet, the bottom of U-shaped desulfurizing tower is slurry pool, it is characterized in that: be provided with the slurries divider wall in the described slurry pool, the slurries divider wall is divided into slurry pool in the front circulation of following current tower and oxidation pond and in the rear 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, front circulation desulfurization district is set in the described following current tower, rear circulation desulfurization district is set in the countercurrent tower, be communicated with front circulation desulfurization district by front circulating pump with oxidation pond in the described front circulation, be communicated with rear circulation desulfurization district by rear circulating pump with oxidation pond in the rear circulation.
2. the U-shaped tower desulphurization system of two circulations according to claim 1, it is characterized in that: top, circulation desulfurization district is provided with and does wet interface rinse-system before in the described following current tower, in the described countercurrent tower after top, circulation desulfurization district be provided with demister.
3. the U-shaped tower desulphurization system of two circulations according to claim 1 is characterized in that: also be communicated with front cyclic oxidation air system with oxidation pond in the described front circulation, also be communicated with rear cyclic oxidation air system with oxidation pond in the described rear circulation.
4. the U-shaped tower desulphurization system of two circulations according to claim 1 is characterized in that: also be communicated with the desulfurizing agent replenishment system with oxidation pond in the described rear circulation, also be communicated with the plasma discharge system with oxidation pond in the described front circulation.
5. the U-shaped tower desulphurization system of two circulations according to claim 1 is characterized in that: be respectively equipped with agitator in the described front circulation and in oxidation pond and the rear circulation and on the oxidation pond.
6. the U-shaped tower desulphurization system of two circulations according to claim 1, it is characterized in that: described U-shaped desulfurizing tower is U-shaped squarer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220446704.8U CN202762303U (en) | 2012-09-04 | 2012-09-04 | Desulfurization system of bi-circulating U-shaped tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220446704.8U CN202762303U (en) | 2012-09-04 | 2012-09-04 | Desulfurization system of bi-circulating U-shaped tower |
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| Publication Number | Publication Date |
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| CN202762303U true CN202762303U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220446704.8U Expired - Lifetime CN202762303U (en) | 2012-09-04 | 2012-09-04 | Desulfurization system of bi-circulating U-shaped tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794103A (en) * | 2012-09-04 | 2012-11-28 | 中电投远达环保工程有限公司 | Double circulation U-shaped tower desulfurization system and process |
| CN103831006A (en) * | 2014-01-18 | 2014-06-04 | 西安西热锅炉环保工程有限公司 | Novel downstream tower-countercurrent tower series-connected flue gas desulphurization apparatus |
-
2012
- 2012-09-04 CN CN201220446704.8U patent/CN202762303U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794103A (en) * | 2012-09-04 | 2012-11-28 | 中电投远达环保工程有限公司 | Double circulation U-shaped tower desulfurization system and process |
| CN103831006A (en) * | 2014-01-18 | 2014-06-04 | 西安西热锅炉环保工程有限公司 | Novel downstream tower-countercurrent tower series-connected flue gas desulphurization apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |
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| CX01 | Expiry of patent term |