CN202700364U - Double circulating monotower desulfurizing system - Google Patents
Double circulating monotower desulfurizing system Download PDFInfo
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- CN202700364U CN202700364U CN 201220400931 CN201220400931U CN202700364U CN 202700364 U CN202700364 U CN 202700364U CN 201220400931 CN201220400931 CN 201220400931 CN 201220400931 U CN201220400931 U CN 201220400931U CN 202700364 U CN202700364 U CN 202700364U
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- desulfurizing
- cocycle
- oxidation pond
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- lower circulation
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Abstract
The utility model discloses a double circulating monotower desulfurizing system. A liquid accumulating disc is arranged in a desulfurizing tower to divide a desulfurizing area into an upper circulating desulfurizing area and a lower circulating desulfurizing area. The lower circulating desulfurizing area, a lower circulating neutralization oxidation pond and a lower circulating pump form a lower circulating desulfurizing system jointly. The upper circulating desulfurizing area, an upper circulating neutralization oxidation pond and an upper circulating pump form an upper circulating desulfurizing system jointly. Two circulating desulfurizing systems which are independent are formed in one desulfurizing tower. Desulfurization of flue gas is realized by the two circulating desulfurizing systems jointly. The two circulating desulfurizing systems provided by the utility model operate relatively independently but are arranged in one desulfurizing tower, so that, not only is the higher desulfurizing efficiency ensured, but also the slurry circulation volume and system consumption are reduced, and occupation of land is reduced and the investment is saved due to integral arrangement of the monotower. The double circulating monotower desulfurizing system provided by the utility model is in particular suitable for desulfurization of flue gas generated by combustion of sulphur coal, and the desulfurizing 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 single 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 single 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 single tower desulphurization system of two circulations of the present utility model, comprise desulfurizing tower, described desulfurizing tower bottom is provided with smoke inlet, top is provided with exhanst gas outlet, described desulfurizing tower inner bottom part be provided with in the lower circulation and oxidation pond and cocycle in and oxidation pond, in the cocycle and oxidation pond be communicated with oxidation pond by in overfall and the lower circulation; Set gradually from bottom to up lower circulation desulfurization district, drip tray, cocycle desulfurization zone and demister between the inner smoke inlet of described desulfurizing tower and the exhanst gas outlet; Described lower circulation desulfurization district in the lower circulation and the oxidation pond setting, in the lower circulation and oxidation pond be communicated with lower circulation desulfurization district by lower circulating pump; Separated by drip tray between described lower circulation desulfurization district and the cocycle desulfurization zone, be distributed with projection on the card of described drip tray, convex top has smoke ventilator, in described drip tray and the cocycle and oxidation pond is communicated with, be communicated with the cocycle desulfurization zone by the cocycle pump with oxidation pond in the cocycle.
Further, also be communicated with lower cyclic oxidation air system with oxidation pond in the described lower circulation, also be communicated with cocycle oxidation air system with oxidation pond in the described cocycle.
Further, also be communicated with the desulfurizing agent replenishment system with oxidation pond in the described cocycle, also be communicated with the plasma discharge system with oxidation pond in the described lower circulation.
Further, be respectively equipped with agitator in the described lower circulation and in oxidation pond and the cocycle and on the oxidation pond.
Further, described desulfurizing tower is squarer.
The beneficial effects of the utility model are: the utility model arranges drip tray desulfurization zone is divided into upper and lower circulation desulfurization district in desulfurizing tower, upper and lower circulation desulfurization district and circulating pump, in and the relatively independent operation such as oxidation pond, in a desulfurizing tower, form relatively independent double circulation desulphurization system, the desulfurization of flue gas is finished jointly by the double circulation desulphurization system, the high pH value operation of cocycle desulphurization system, be more conducive to desulfurization, the low pH value operation of lower circulation desulfurization system is more conducive to sulphate crystal.
The relatively independent operation of double circulation desulphurization system of the present utility model, but be arranged in the desulfurizing tower had both guaranteed higher desulfuration efficiency, had reduced again slurries internal circulating load and system energy consumption, and single tower integral arrangement also reduced occupation of land, had 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 single tower desulphurization system of two circulations of the present utility model, comprise desulfurizing tower 1, described desulfurizing tower 1 bottom is provided with smoke inlet 2, top is provided with exhanst gas outlet 3, described desulfurizing tower 1 inner bottom part be provided with in the lower circulation and oxidation pond 4 and cocycle in and oxidation pond 5, in the cocycle and oxidation pond 5 be communicated with oxidation pond 4 by in overfall and the lower circulation; Set gradually from bottom to up lower circulation desulfurization district 6, drip tray 7, cocycle desulfurization zone 8 and demister 9 between described desulfurizing tower 1 inner smoke inlet 2 and the exhanst gas outlet 3; Described lower circulation desulfurization district 6 arranges with oxidation pond 4 in lower circulation, is communicated with lower circulation desulfurization district 6 by lower circulating pump 10 with oxidation pond 4 in the lower circulation; Separated by drip tray 7 between described lower circulation desulfurization district 6 and the cocycle desulfurization zone 8, be distributed with projection on the card of described drip tray 7, convex top has smoke ventilator, in described drip tray 7 and the cocycle and oxidation pond 5 is communicated with, be communicated with cocycle desulfurization zone 8 by cocycle pump 11 with oxidation pond 5 in the cocycle.In lower circulation desulfurization district 6, the lower circulation and oxidation pond 4 and lower circulating pump 10 are common forms lower circulation desulfurization systems, in cocycle desulfurization zone 8, the cocycle and oxidation pond 5 and the cocycle pump 11 common cocycle desulphurization systems that form, in a desulfurizing tower, form relatively independent double circulation desulphurization system; Drip tray 7 can allow flue gas pass through, and can allow again the desulfurization slurry of cocycle desulfurization zone 8 enter in the cocycle He in the oxidation pond 5 and circulate, directly do not enter in the lower circulation and oxidation pond 4 in, guarantee the relatively independent operation of double circulation desulphurization system.
In the present embodiment, also be communicated with lower cyclic oxidation air system 12 with oxidation pond 4 in the described lower circulation, also be communicated with cocycle oxidation air system 13 with oxidation pond 5 in the described cocycle; The oxidation air cloth air port of lower cyclic oxidation air system 12 and cocycle oxidation air system 13 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 14 with oxidation pond 5 in the described cocycle, also be communicated with plasma discharge system 15 with oxidation pond 4 in the described lower circulation.
In the present embodiment, be respectively equipped with agitator (being respectively agitator 16 and agitator 17 among the figure) in the described lower circulation and in oxidation pond 4 and the cocycle and on the oxidation pond 5; 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 desulfurizing tower 1 is squarer; The preferred squarer of the structure of desulfurizing tower 1, but also can be various possible combinations or the modes of texturing such as circular tower or circumference tower.
In the utility model, demister 9 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) of lower circulation desulfurization district 6 and cocycle desulfurization zone 8 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 single tower desulphurization system of two circulations of the present utility model, former flue gas enters desulfurizing tower 1 from smoke inlet 2, then the 6 interior desulfurization slurry absorbing and removing SO that provided by lower circulating pump 10 in lower circulation desulfurization district
2, desulfurization slurry absorbs SO
2After fall in lower circulation and the oxidation pond 4; Clean flue gas after lower circulation desulfurization district 6 processes enters cocycle desulfurization zone 8 from the smoke ventilator on the drip tray 7, then at the cocycle desulfurization zone 8 interior further absorbing and removing SO of desulfurization slurry that provided by cocycle pump 11
2, desulfurization slurry absorbs SO
2Afterwards by drip tray 7 collect flow in the cocycles and in the oxidation pond 5 (desulfurization slurry collected of drip tray 7 can be as shown in the figure directly flow automatically in the cocycle and oxidation pond 5 in, also can be by the tower Outer Tube flow automatically in the cocycle and oxidation pond 5 in); After clean flue gas after cocycle desulfurization zone 8 is processed enters demister 9 demist dedustings, discharge desulfurizing tower 1 from exhanst gas outlet 3.
Absorb SO
2After the desulfurization slurries that fall in lower circulation and the oxidation pond 4 provide oxygen to carry out oxidation reaction by lower cyclic oxidation air system 12, generate sulfate and crystallization; Absorb SO
2Provide oxygen to carry out oxidation reaction with oxidation pond 5 interior desulfurization slurries by cocycle oxidation air system 13 in the rear inflow cocycle, generate sulfate.
Desulfurizing agent replenishment system 14 is supplemented in the cocycle desulfurizing agent with (it can be to replenish with the slurries form that desulfurizing agent replenishes in the oxidation pond 5, also can be to replenish with other forms such as powders), in the cocycle and the desulfurization slurries in the oxidation pond 5 overflow in the lower circulation and oxidation pond 4 in, in the lower circulation and the crystalline sulfuric acid salt in the oxidation pond 4 after plasma discharge system 15 discharges, process.
In the lower circulation and the desulfurization slurry pH values in the oxidation pond 4 be 5 ~ 5.6, be conducive to sulphate crystal, liquid level is in the low level operation; In the cocycle and the desulfurization slurry pH values in the oxidation pond 5 be 5.6 ~ 6.3, be conducive to improve desulfuration efficiency, reduce liquid-gas ratio, reduce cocycle pump energy consumption, liquid level is in run at high level; In the lower circulation and in oxidation pond 4 and the cocycle and the desulfurization slurry mass concentrations in the oxidation pond 5 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, but be arranged in the desulfurizing tower, both guaranteed higher desulfuration efficiency, reduced again slurries internal circulating load and system energy consumption, and single tower integral arrangement also reduces occupation of land, 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 (5)
1. single tower desulphurization system of two circulations, comprise desulfurizing tower, described desulfurizing tower bottom is provided with smoke inlet, top is provided with exhanst gas outlet, it is characterized in that: described desulfurizing tower inner bottom part be provided with in the lower circulation and oxidation pond and cocycle in and oxidation pond, in the cocycle and oxidation pond be communicated with oxidation pond by in overfall and the lower circulation; Set gradually from bottom to up lower circulation desulfurization district, drip tray, cocycle desulfurization zone and demister between the inner smoke inlet of described desulfurizing tower and the exhanst gas outlet; Described lower circulation desulfurization district in the lower circulation and the oxidation pond setting, in the lower circulation and oxidation pond be communicated with lower circulation desulfurization district by lower circulating pump; Separated by drip tray between described lower circulation desulfurization district and the cocycle desulfurization zone, be distributed with projection on the card of described drip tray, convex top has smoke ventilator, in described drip tray and the cocycle and oxidation pond is communicated with, be communicated with the cocycle desulfurization zone by the cocycle pump with oxidation pond in the cocycle.
2. the single tower desulphurization system of two circulations according to claim 1 is characterized in that: also be communicated with lower cyclic oxidation air system with oxidation pond in the described lower circulation, also be communicated with cocycle oxidation air system with oxidation pond in the described cocycle.
3. the single 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 cocycle, also be communicated with the plasma discharge system with oxidation pond in the described lower circulation.
4. the single tower desulphurization system of two circulations according to claim 1 is characterized in that: be respectively equipped with agitator in the described lower circulation and in oxidation pond and the cocycle and on the oxidation pond.
5. the single tower desulphurization system of two circulations according to claim 1, it is characterized in that: described desulfurizing tower is squarer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400931 CN202700364U (en) | 2012-08-14 | 2012-08-14 | Double circulating monotower desulfurizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220400931 CN202700364U (en) | 2012-08-14 | 2012-08-14 | Double circulating monotower desulfurizing system |
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| Publication Number | Publication Date |
|---|---|
| CN202700364U true CN202700364U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220400931 Expired - Lifetime CN202700364U (en) | 2012-08-14 | 2012-08-14 | Double circulating monotower desulfurizing system |
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| CN (1) | CN202700364U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764583A (en) * | 2012-08-14 | 2012-11-07 | 中电投远达环保工程有限公司 | Dual-circulation single-tower desulfurization systems and process thereof |
| CN108421399A (en) * | 2018-03-23 | 2018-08-21 | 东南大学 | Collaboration promotes fine particle and the devices and methods therefor of sulfur trioxide acid mist removing in a kind of process of wet desulphurization of single column two-region |
-
2012
- 2012-08-14 CN CN 201220400931 patent/CN202700364U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102764583A (en) * | 2012-08-14 | 2012-11-07 | 中电投远达环保工程有限公司 | Dual-circulation single-tower desulfurization systems and process thereof |
| CN102764583B (en) * | 2012-08-14 | 2015-04-22 | 中电投远达环保工程有限公司 | Process of dual-circulation single-tower desulfurization systems |
| CN108421399A (en) * | 2018-03-23 | 2018-08-21 | 东南大学 | Collaboration promotes fine particle and the devices and methods therefor of sulfur trioxide acid mist removing in a kind of process of wet desulphurization of single column two-region |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |