CN104923064A - Flue gas desulphurization system - Google Patents
Flue gas desulphurization system Download PDFInfo
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- CN104923064A CN104923064A CN201510326051.8A CN201510326051A CN104923064A CN 104923064 A CN104923064 A CN 104923064A CN 201510326051 A CN201510326051 A CN 201510326051A CN 104923064 A CN104923064 A CN 104923064A
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Abstract
The invention discloses a flue gas desulphurization system which comprises a desulfurizing tower. A fair current tower and a countercurrent tower are arranged on the upper portion of the desulfurizing tower and separated from each other, a smoke inlet is formed in the fair current tower, a smoke outlet is formed in the countercurrent tower, and a slurry pond is arranged on the lower portion of the desulfurizing tower. A front circulating desulfurization area is arranged in the fair current tower, a rear circulating desulfurization area is arranged in the countercurrent tower, and an outlet of a front circulation pump is communicated with the slurry pond through a front return pipe. An outlet of a rear circulation pump is further communicated with the slurry pond through a rear return pipe. Multiple spraying holes are evenly formed in the part, stretching into the corresponding fair current tower, of a front circulation pipe and the part, stretching into the corresponding countercurrent tower, of a rear circulation pipe, slurry is sprayed out to the center to form a slurry curtain, smoke can be filtered fully, and the desulphurization effect is guaranteed.
Description
Technical field
The present invention relates to a kind of flue gas desulfurization technique, be specifically related to a kind of flue gas desulphurization system.
Background technology
Current single cycle flue gas desulphurization system 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 flue gas desulphurization system system is utilized to meet emission request, flue gas desulphurization system will be very high, and energy consumption is also higher, sometimes just has to a flue gas desulphurization system to be divided into two flue gas desulphurization system series operations, but two flue gas desulphurization system 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.
Summary of the invention
In view of this, the invention provides a kind of flue gas desulphurization system, can while meeting desulfuration efficiency, reduce system energy consumption, investment reduction, occupation of land, reach again the up-to-date discharge standard of national requirements, desulfurized effect is good, is beneficial to environmental protection.
Flue gas desulphurization system of the present invention, comprises 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, Posterior circle desulfurization zone is provided with in countercurrent tower, described front circulation delivery side of pump is communicated to front circulation desulfurization district by front circulation pipe, Posterior circle delivery side of pump is communicated to Posterior circle desulfurization zone by Posterior circle pipe, and front circulation delivery side of pump is also communicated with slurry pool by front return duct; Posterior circle delivery side of pump is also communicated with slurry pool by rear return duct; Front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower, and front circulation pipe and Posterior circle pipe stretch into partial fixing in corresponding following current tower and countercurrent tower in corresponding following current tower and countercurrent tower inwall and at least one circumference of passage circulated for flue gas in circulation desulfurization district before corresponding and Posterior circle desulfurization zone; Front circulation pipe and Posterior circle pipe stretch into the length of the part in corresponding following current tower and countercurrent tower along pipe to being evenly arranged multiple squit hole;
Further, the passage of part for flue gas circulation in corresponding front circulation desulfurization district and Posterior circle desulfurization zone that described front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower forms spiral tube structure;
Further, described squit hole is horizontally disposed with and towards the axis of spiral tube structure;
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 flue gas desulphurization system is the tower of U-shaped tower or other likeness in form.
Beneficial effect of the present invention is: the present invention arrange in flue gas desulphurization system 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, realize forming relatively independent double circulation desulphurization system in a flue gas desulphurization system with this, the desulfurization of flue gas is completed jointly by double circulation desulphurization system, slurries are formed slurries curtain to center ejection, can filter fully flue gas, ensure desulfurized effect.
The relatively independent operation of flue gas desulphurization system of the present invention, both ensure that higher desulfuration efficiency, and again reduced serum recycle amount and system energy consumption, and flue gas desulphurization system integral arrangement also reduces flue gas desulphurization system height, simplify the system of double circulation desulphurization, save investment; The present invention is particularly suitable for the flue gas desulfurization that burning high sulfur coal produces, and desulfuration efficiency can reach more than 99%, and desulfurized effect is good, is beneficial to environmental protection.
Relative to the desulphurization system of routine, flue gas desulphurization system of the present invention 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 flue gas desulphurization system, desulfurization slurry mass concentration is 20% ~ 25%, and concentration improves, and relative to two flue gas desulphurization system series connection, slurry pool volume is relatively little, cost of reducing investment outlay.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Fig. 1 is structural representation of the present invention, as shown in the figure, flue gas desulphurization system of the present invention, comprise desulfurizing tower, 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, and countercurrent tower 4 is provided with exhanst gas outlet, and 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, front circulation desulfurization district 15 is provided with in described following current tower 2, Posterior circle desulfurization zone 6 is provided with in countercurrent tower 4, front circulation desulfurization district 15 is communicated with slurry pool 9 by front circulating pump 12, and Posterior circle desulfurization zone 6 is communicated with slurry pool 9 by Posterior circle pump 7, the outlet of described front circulating pump 12 is communicated with by front circulation pipe 17 with between front circulation desulfurization district 15, and the outlet of Posterior circle pump 7 is communicated with by Posterior circle pipe 18 with between Posterior circle desulfurization zone 6, and front circulation delivery side of pump is also communicated with slurry pool by front return duct 19, Posterior circle delivery side of pump is also communicated with slurry pool by rear return duct 20, front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower, and front circulation pipe and Posterior circle pipe stretch into partial fixing in corresponding following current tower and countercurrent tower in corresponding following current tower and countercurrent tower inwall and at least one circumference of passage circulated for flue gas in circulation desulfurization district before corresponding and Posterior circle desulfurization zone, front circulation pipe and Posterior circle pipe stretch into the length of the part in corresponding following current tower and countercurrent tower along pipe to being evenly arranged multiple squit hole, 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, relatively independent double circulation desulphurization system is formed in a desulfurizing tower 14, the desulfurization of flue gas is completed jointly by double circulation desulphurization system, but the relatively independent operation of double circulation desulphurization system, slurries are formed slurries curtain to center ejection by the part that the front circulation pipe of the present embodiment and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower, can filter fully flue gas, ensure desulfurized effect, front return duct 19 is connected to form front three-way pipe with front circulation pipe, rear return duct 20 is connected to form rear three-way pipe with Posterior circle pipe, 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, the passage of part for flue gas circulation in corresponding front circulation desulfurization district and Posterior circle desulfurization zone that described front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower forms spiral tube structure, the end of front circulation pipe 17 and Posterior circle pipe 18 is shut, slurries in front circulation pipe 17 and Posterior circle pipe 18 are sprayed by squit hole, spiral tube structure integraty is good, metal tube bending forming in the shape of a spiral can be adopted, and need to arrange the corresponding number of turn according to the purification of flue gas, ensure filter effect.
In the present embodiment, described squit hole is horizontally disposed with and towards the axis of spiral tube structure, spiral helicine slurries curtain can be formed, each squit hole is arranged the cross section that can realize covering corresponding front circulation desulfurization district 15 and Posterior circle desulfurization zone 6 completely around the passage dislocation that flue gas circulates, flue gas is filtered fully, ensures desulfurized effect; Front circulation pipe 17 and Posterior circle pipe 18 are provided with the helicla flute of the center line around pipe, make the slurries helical flow in front circulation pipe 17 and Posterior circle pipe 18, the tubular wire of squit hole and corresponding front circulation pipe 17 or Posterior circle pipe 18 inwall tangent, be beneficial to slurries ejection.
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 present invention, 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 flue gas desulphurization system of the present invention, 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 present invention, 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 present invention 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 technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, 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 invention that appended claims limits.
Claims (9)
1. a flue gas 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, front circulation desulfurization district is communicated with slurry pool by front circulating pump, and Posterior circle desulfurization zone is communicated with slurry pool by Posterior circle pump; Described front circulation delivery side of pump is communicated with by front circulation pipe with between front circulation desulfurization district, is communicated with between Posterior circle delivery side of pump with Posterior circle desulfurization zone by Posterior circle pipe, and front circulation delivery side of pump is also communicated with slurry pool by front return duct; Posterior circle delivery side of pump is also communicated with slurry pool by rear return duct; Front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower, and front circulation pipe and Posterior circle pipe stretch into partial fixing in corresponding following current tower and countercurrent tower in corresponding following current tower and countercurrent tower inwall and at least one circumference of passage circulated for flue gas in circulation desulfurization district before corresponding and Posterior circle desulfurization zone; Front circulation pipe and Posterior circle pipe stretch into the length of the part in corresponding following current tower and countercurrent tower along pipe to being evenly arranged multiple squit hole.
2. flue gas desulphurization system according to claim 1, is characterized in that: the passage of part for flue gas circulation in corresponding front circulation desulfurization district and Posterior circle desulfurization zone that described front circulation pipe and Posterior circle pipe stretch in corresponding following current tower and countercurrent tower forms spiral tube structure.
3. flue gas desulphurization system according to claim 2, is characterized in that: described squit hole is horizontally disposed with and towards the axis of spiral tube structure.
4. flue gas desulphurization system according to claim 3, 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.
5. flue gas desulphurization system according to claim 4, is characterized in that: described slurry pool is also communicated with oxidation air system.
6. flue gas desulphurization system according to claim 5, is characterized in that: described slurry pool is also communicated with desulfurizing agent replenishment system.
7. flue gas desulphurization system according to claim 6, is characterized in that: described slurry pool is also communicated with plasma discharge system.
8. flue gas desulphurization system according to claim 7, is characterized in that: be provided with one or more agitator in described slurry pool.
9. flue gas desulphurization system according to claim 8, is characterized in that: described flue gas desulphurization system is the tower of U-shaped tower or other likeness in form.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510326051.8A CN104923064A (en) | 2015-06-15 | 2015-06-15 | Flue gas desulphurization system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510326051.8A CN104923064A (en) | 2015-06-15 | 2015-06-15 | Flue gas desulphurization system |
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| CN104923064A true CN104923064A (en) | 2015-09-23 |
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| CN201510326051.8A Pending CN104923064A (en) | 2015-06-15 | 2015-06-15 | Flue gas desulphurization system |
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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 |
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| CN201519551U (en) * | 2009-01-23 | 2010-07-07 | 四川君和环保工程有限公司 | Smoke gas desulfurization absorption tower with combined tower kettle liquid phase mixing system |
| CN103381333A (en) * | 2013-07-25 | 2013-11-06 | 中能服(北京)节能投资有限公司 | Device and method for dust removal and desulphurization through wet method |
| CN203725009U (en) * | 2014-02-21 | 2014-07-23 | 中电投远达环保工程有限公司 | Single-tower and double-circulation desulfurization system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201015726Y (en) * | 2007-02-13 | 2008-02-06 | 浙江天蓝脱硫除尘有限公司 | Segmented sodium calcium double alkali desulfurization device |
| JP2009045522A (en) * | 2007-08-15 | 2009-03-05 | Ihi Corp | Exhaust gas treating method and treatment apparatus |
| CN201519551U (en) * | 2009-01-23 | 2010-07-07 | 四川君和环保工程有限公司 | Smoke gas desulfurization absorption tower with combined tower kettle liquid phase mixing system |
| CN103381333A (en) * | 2013-07-25 | 2013-11-06 | 中能服(北京)节能投资有限公司 | Device and method for dust removal and desulphurization through wet method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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Application publication date: 20150923 |