CN204973548U - Bicirculating desulfuration system - Google Patents
Bicirculating desulfuration system Download PDFInfo
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- CN204973548U CN204973548U CN201520283655.4U CN201520283655U CN204973548U CN 204973548 U CN204973548 U CN 204973548U CN 201520283655 U CN201520283655 U CN 201520283655U CN 204973548 U CN204973548 U CN 204973548U
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Abstract
The utility model discloses a bicirculating desulfuration system, the utility model discloses the circulation desulfurization district desulfurization district of circulating after with before desulfurizing tower upper portion sets up mutually independent, preceding circulation desulfurization district, preceding circulating pump and the preceding circulation desulfurization system of the common formation in thick liquid pond, after the desulfurization system that circulates after desulfurization district, back circulating pump form with the thick liquid pond jointly that circulates, the preceding circulation desulfurization system thick liquid pond of desulfurization system sharing of circulating after with to this realizes forming relatively independent bicirculating desulfuration system in a desulfurizing tower, and the desulfurization of flue gas is accomplished by bicirculating desulfuration system jointly, the utility model discloses both guarantee higher desulfurization efficiency, reduced thick liquid circulation volume and system energy consumption again to the desulfurizing tower height has still been reduced to whole the arranging of desulfurizing tower, has simplified the desulfurated system of dual cycle, the utility model discloses the flue gas desulfurization that the sulphur coal that is particularly suitable for burning produced, desulfurization efficiency can reach more than 99%.
Description
Technical field
The utility model relates to a kind of flue gas desulfurization technique, is specifically related to a kind of double circulation desulphurization system.
Background technology
The SO of up-to-date fossil-fuel power plant atmospheric pollutant emission standard (GB13223-2011)
2emission limit improves comparatively large, and General Requirements is at 100mg/Nm
3within, local area requires 50mg/Nm
3.
Current single cycle desulfurizing tower system mainly operates in middle low-sulfur coal area, can meet emission request completely.To part sulphur coal area, require that desulfuration efficiency reaches more than 98%, even require more than 99% could meet emission request, single cycle desulfurizing tower system is utilized to meet emission request, desulfurizing tower will be very high, and energy consumption is also higher, sometimes just has to a desulfurizing tower to be divided into two desulfurizing tower series operations, but two desulfurizing tower series connection are taken up an area, are invested very greatly, are unfavorable for that high-efficiency and economic runs; And when traditional desulphurization system is shut down, slurry pool precipitation is serious, affects the desulfurization performance of slurries, is unfavorable for using.
Therefore, under the up-to-date discharge standard of national requirements, be necessary very much the desulfur technology developing high-efficiency low energy consumption, to meet the requirement of environmental protection, have better living space to the mankind.
Utility model content
In view of this, the utility model provides a kind of double circulation desulphurization system, can while meeting desulfuration efficiency, and reduce system energy consumption, investment reduction, occupation of land, reach again the up-to-date discharge standard of national requirements, desulfurization performance is good, is beneficial to environmental protection.
Double circulation desulphurization system of the present utility model, comprise desulfurizing tower, the top of described desulfurizing tower is the following current tower and countercurrent tower mutually separated, following current tower is provided with smoke inlet, countercurrent tower is provided with exhanst gas outlet, the bottom of desulfurizing tower is slurry pool, for being communicated with the exhaust gases passes of following current tower and countercurrent tower above described slurry pool, in described following current tower, front circulation desulfurization district is set, arrange Posterior circle desulfurization zone in countercurrent tower, described front circulation delivery side of pump is communicated in circulation desulfurization district before slurry pool and following current tower by front three-way pipe; Described Posterior circle delivery side of pump is communicated in the Posterior circle desulfurization zone of slurry pool and countercurrent tower by rear three-way pipe;
Further, top, described following current Ta Neiqian circulation desulfurization district is provided with dry wet interface rinse-system, and in described countercurrent tower, top, Posterior circle desulfurization zone is provided with demister;
Further, described slurry pool is also communicated with oxidation air system;
Further, described slurry pool is also communicated with desulfurizing agent replenishment system;
Further, described slurry pool is also communicated with plasma discharge system;
Further, one or more agitator is provided with in described slurry pool;
Further, described desulfurizing tower is the tower of U-shaped tower or other likeness in form.
The beneficial effects of the utility model are: the utility model arrange in desulfurizing tower simultaneously separate before circulation desulfurization district and Posterior circle desulfurization zone, front circulation desulfurization district, front circulating pump and slurry pool form front circulation desulfurization system jointly; Posterior circle desulfurization zone, Posterior circle pump and slurry pool form Posterior circle desulphurization system jointly; Front circulation desulfurization system and Posterior circle desulphurization system share a slurry pool, and realize forming relatively independent double circulation desulphurization system in a desulfurizing tower with this, the desulfurization of flue gas is completed jointly by double circulation desulphurization system.
The relatively independent operation of double circulation desulphurization system of the present utility model, both ensure that higher desulfuration efficiency, and again reduced serum recycle amount and system energy consumption, and desulfurizing tower integral arrangement also reduces desulfurizing tower height, simplify the system of double circulation desulphurization, save investment; The utility model is particularly suitable for the flue gas desulfurization that burning high sulfur coal produces, and desulfuration efficiency can reach more than 99%, and desulfurization performance is good, is beneficial to environmental protection.
Relative to the desulphurization system of routine, double circulation desulphurization system of the present utility model adopts U-shaped Deethanizer design, and contribute to abundant contact and the mixing of gas-liquid two-phase, the time of staying is longer, and desulfurized effect is better.The desulfurization slurry mass concentration of conventional desulphurization system is about 15%, and adopt double circulation desulphurization system, desulfurization slurry mass concentration is 20% ~ 25%, and concentration improves, and relative to two desulfurizing tower series connection, slurry pool volume is relatively little, cost of reducing investment outlay.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Fig. 1 is structural representation of the present utility model, as shown in the figure, double circulation desulphurization system of the present utility model, comprise desulfurizing tower 14, the top of described desulfurizing tower 14 is the following current tower 2 and countercurrent tower 4 mutually separated, following current tower 2 is provided with smoke inlet, countercurrent tower 4 is provided with exhanst gas outlet, the bottom of desulfurizing tower 14 is slurry pool 9, for being communicated with the exhaust gases passes 16 of following current tower 2 and countercurrent tower 4 above described slurry pool 9, in described following current tower 2, front circulation desulfurization district 15 is set, Posterior circle desulfurization zone 6 is set in countercurrent tower 4, the outlet of described front circulating pump 12 is communicated in circulation desulfurization district 15 before slurry pool 9 and following current tower 2 by front three-way pipe, the outlet of described Posterior circle pump 7 is communicated in the Posterior circle desulfurization zone 6 of slurry pool 9 and countercurrent tower 4 by rear three-way pipe, circulation desulfurization system before front circulation desulfurization district 15, front circulating pump 12 are formed jointly with slurry pool 9, Posterior circle desulfurization zone 6, Posterior circle pump 7 form Posterior circle desulphurization system jointly with slurry pool 9, front circulation desulfurization system and Posterior circle desulphurization system share a slurry pool 9, and in a desulfurizing tower 14, form relatively independent double circulation desulphurization system, the desulfurization of flue gas is completed jointly by double circulation desulphurization system, but the relatively independent operation of double circulation desulphurization system, when traditional desulphurization system is shut down, slurry pool precipitation is serious, affect the desulfurization performance of slurries, be unfavorable for using, the outlet of front circulating pump 12 and Posterior circle pump 7 is not only passed to corresponding front circulation desulfurization district 15 and Posterior circle desulfurization zone 6 by the present embodiment, but also have employed corresponding front three-way pipe and the outlet of front circulating pump 12 and Posterior circle pump 7 is communicated with between slurry pool 9 by rear three-way pipe, front three-way pipe, rear three-way pipe and corresponding front circulation desulfurization district 15, the pipeline section that Posterior circle desulfurization zone 6 is communicated with slurry pool 9 is all provided with the valve for controlling break-make, when desulphurization system is run, by front circulating pump 12 and Posterior circle pump 7, circulation desulfurization district 15 and Posterior circle desulfurization zone 6 provide slurries forward, before opening when desulphurization system is shut down, front three-way pipe closed by circulating pump 12 and Posterior circle pump 7 simultaneously, rear three-way pipe and corresponding front circulation desulfurization district 15, valve between Posterior circle desulfurization zone 6, and then realize circulating of slurries in slurry pool 9 by front circulating pump 12 and Posterior circle pump 7, slurries are effectively avoided to precipitate, ensure desulfurization performance, be beneficial to environmental protection, the liquid outlet that front three-way pipe and rear three-way pipe are communicated with slurry pool 9 is positioned at the liquid level of slurry pool 9 slurries once, before reducing the power consumption of circulating pump 12 and Posterior circle pump 7 avoid slurries to splash simultaneously and noise excessive.
In the present embodiment, top, described following current tower 2 Nei Qian circulation desulfurization district 15 is provided with dry wet interface rinse-system 1, and in described countercurrent tower 4, top, Posterior circle desulfurization zone 6 is provided with demister 3.
In the present embodiment, described slurry pool 9 is also communicated with oxidation air system 13, and the oxidation air cloth air port of oxidation air system 13 can be thatch rifle, also can be other forms such as plug flat.
In the present embodiment, described slurry pool 9 is also communicated with desulfurizing agent replenishment system 5, and desulfurizing agent replenishment system 5 for supplementing appropriate desulfurizing agent in slurry pool 9.
In the present embodiment, described slurry pool 9 is also communicated with plasma discharge system 11, and the crystalline sulfuric acid salt formed in slurry pool 9 can effectively be discharged by plasma discharge system 11.
In the present embodiment, in described slurry pool 9, be provided with one or more agitator (being respectively agitator 10 and agitator 8 in figure); The agitating mode of agitator can be that impeller stirs, and also can be other agitating modes such as flow-disturbing stirring; Agitator major function prevents precipitation, oxidation reinforced effect.
In the present embodiment, described desulfurizing tower 14 is the tower of U-shaped tower or other likeness in form, the preferred U-shaped squarer of structure of desulfurizing tower 14, but also can be various possible combination or the mode of texturing such as U-shaped circular tower or U-shaped circumference tower.
In the utility model, demister 3 can be dull and stereotyped or chevron shaped fixed board-like demister 3, also can be other forms such as the combination of wet electrical dust precipitator or fixed board-like demister 3 and wet electrical dust precipitator; The preferred fluid column of absorpting form (or liquid curtain) of front circulation desulfurization district 15 and Posterior circle desulfurization zone 6 absorbs, but also can be the various possible form such as spray+fluid column (or liquid curtain) or spray+spray-absorption.
Use the sulfur removal technology of double circulation desulphurization system of the present utility model, former flue gas enters desulfurizing tower 14 from smoke inlet, after dry wet interface rinse-system 1, enter front circulation desulfurization district 15, then in front circulation desulfurization district 15 by desulfurization slurry absorbing and removing SO that front circulating pump 12 provides
2, desulfurization slurry absorbs SO
2after fall in slurry pool 9; The exhaust gases passes 16 of neat stress above slurry pool 9 after premenstrual circulation desulfurization district 15 processes enters Posterior circle desulfurization zone 6, then in Posterior circle desulfurization zone 6 by the further absorbing and removing SO of desulfurization slurry that Posterior circle pump 7 provides
2, desulfurization slurry absorbs SO
2after fall in slurry pool 9, through Posterior circle desulfurization zone 6 process after neat stress enter demister 3 demist dedusting after, from exhanst gas outlet discharge desulfurizing tower 14.
Absorb SO
2after the desulfurization slurry fallen in slurry pool 9 provide oxygen to carry out oxidation reaction by oxidation air system 13, generate sulfate crystallization.
Desulfurizing agent is supplemented in slurry pool 9 that (it can be supplement as a slurry that desulfurizing agent supplements by desulfurizing agent replenishment system 5, also can be supplement with other forms such as powders), the crystalline sulfuric acid salt simultaneously in slurry pool 9 discharges laggard row relax through plasma discharge system 11.
Desulfurization slurry pH value in front circulation and in oxidation pond 7 is 5 ~ 6, is conducive to sulphate crystal, and improves desulfuration efficiency, reduces liquid-gas ratio; Desulfurization slurry mass concentration in slurry pool 9 is 20% ~ 25%; Described desulfurization slurry is made up of calcium base or Mg-base desulfurizing agent.
In the utility model, the desulfurization of flue gas is completed jointly by double circulation desulphurization system, the relatively independent operation of double circulation desulphurization system, both ensure that higher desulfuration efficiency, again reduce serum recycle amount and system energy consumption, and desulfurizing tower 14 integral arrangement also reduces desulfurizing tower 14 height, simplifies the system of double circulation desulphurization, has saved investment; The utility model is particularly suitable for the flue gas desulfurization that burning high sulfur coal produces, and desulfuration efficiency can reach more than 99%.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described the utility model by referring to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, various change can be made 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 (7)
1. a double circulation desulphurization system, is characterized in that: comprise desulfurizing tower, and the top of described desulfurizing tower is the following current tower and countercurrent tower mutually separated, and following current tower is provided with smoke inlet, and countercurrent tower is provided with exhanst gas outlet, and the bottom of desulfurizing tower is slurry pool; For being communicated with the exhaust gases passes of following current tower and countercurrent tower above described slurry pool, front circulation desulfurization district is provided with in described following current tower, be provided with Posterior circle desulfurization zone in countercurrent tower, described front circulation delivery side of pump is communicated in circulation desulfurization district before slurry pool and following current tower by front three-way pipe; Described Posterior circle delivery side of pump is communicated in the Posterior circle desulfurization zone of slurry pool and countercurrent tower by rear three-way pipe; The pipeline section that front three-way pipe, rear three-way pipe and corresponding front circulation desulfurization district, Posterior circle desulfurization zone are communicated with slurry pool is all provided with the valve for controlling break-make.
2. double circulation desulphurization system according to claim 1, is characterized in that: top, described following current Ta Neiqian circulation desulfurization district is provided with dry wet interface rinse-system; In described countercurrent tower, top, Posterior circle desulfurization zone is provided with demister.
3. double circulation desulphurization system according to claim 1, is characterized in that: described slurry pool is also communicated with oxidation air system.
4. double circulation desulphurization system according to claim 1, is characterized in that: described slurry pool is also communicated with desulfurizing agent replenishment system.
5. double circulation desulphurization system according to claim 1, is characterized in that: described slurry pool is also communicated with plasma discharge system.
6. double circulation desulphurization system according to claim 1, is characterized in that: be provided with one or more agitator in described slurry pool.
7. double circulation desulphurization system according to claim 1, is characterized in that: described desulfurizing tower is the tower of U-shaped tower or other likeness in form.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520283655.4U CN204973548U (en) | 2015-05-05 | 2015-05-05 | Bicirculating desulfuration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520283655.4U CN204973548U (en) | 2015-05-05 | 2015-05-05 | Bicirculating desulfuration system |
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| CN204973548U true CN204973548U (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180375A (en) * | 2019-06-10 | 2019-08-30 | 武汉凯迪电力环保有限公司 | A kind of unilateral desulfurizing tower of turning back for being equipped with pallet |
-
2015
- 2015-05-05 CN CN201520283655.4U patent/CN204973548U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110180375A (en) * | 2019-06-10 | 2019-08-30 | 武汉凯迪电力环保有限公司 | A kind of unilateral desulfurizing tower of turning back for being equipped with pallet |
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