CN201930713U - Wet flue gas desulfurizer - Google Patents
Wet flue gas desulfurizer Download PDFInfo
- Publication number
- CN201930713U CN201930713U CN2011200357646U CN201120035764U CN201930713U CN 201930713 U CN201930713 U CN 201930713U CN 2011200357646 U CN2011200357646 U CN 2011200357646U CN 201120035764 U CN201120035764 U CN 201120035764U CN 201930713 U CN201930713 U CN 201930713U
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- CN
- China
- Prior art keywords
- flue gas
- limestone slurry
- air pipeline
- wet flue
- oxidation air
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Abstract
The utility model discloses a wet flue gas desulfurizer, which comprises a desulfurizing absorption tower, a limestone slurry tank and a limestone slurry circulating spray system, wherein the desulfurizing absorption tower is provided with a gas inlet and a gas outlet, and the limestone slurry tank is arranged on the lower portion of an inner cavity of the desulfurizing absorption tower. An oxidation air pipeline and at least one stirrer are arranged in the limestone slurry tank; the oxidation air pipeline is communicated with an oxidation fan; and the stirrers are connected with a stirring motor and positioned on the upper portion of the oxidation air pipeline. Air led in the oxidation air pipeline forms large bubbles in the limestone slurry tank, and the large bubbles are broken into tiny bubbles by the stirrers when rising. Compared with the prior art, as the specific surface area of the tiny bubbles is extremely large, the wet flue gas desulfurizer has the advantages that the velocity of converting CaSO3 (calcium sulfite) into CaSO4 (calcium sulfate) is increased, the desulfurizing capacity of an integral device is improved, only less change is needed in modification without adding equipment investment, and cost is lower.
Description
Technical field
The utility model belongs to the flue gases purification field, is specifically related to a kind of wet flue gas desulfurizer.
Background technology
It is the country of main energy sources with coal that China is one, and coal fired power generation is one of most important approach of utilizing of coal in China, according to the national conditions of China, 21st century coal fired power generation will occupy an leading position.In numerous atmosphere pollutions of coal-fired fired power generating unit discharging, SO2 and dust are bigger to the harm of environment, are the major pollutants that will control.Along with the progress and the expanding economy of society, thermal power plant has been subjected to people's common concern to the pollution of atmospheric environment, and therefore effectively reducing pollutant emission is the severe challenge that China's energy field sustainable development is faced with the influence that improves environment.
At present, existing flue gas desulfurization technique comprises wet desulphurization and dry desulfurization etc., and the utilization of wherein wet desulphurization technology is the most extensive, and wet process of FGD is the technological process that current 85% left and right sides large thermal power plant in the world adopts.Existing wet flue gas desulfurizer capital equipment comprises the limestone slurry liquid pool and the lime stone slurry circulated sprinkling system of desulfuration absorbing tower, desulfuration absorbing tower inner chamber bottom, also is provided with oxidation air pipeline and agitator in the limestone slurry liquid pool; By lime stone slurry circulated sprinkling system, the lime stone slurry in the limestone slurry liquid pool is promoted in the desulfuration absorbing tower top spray and descend lime stone slurry drop and flue gas haptoreaction generation CaSO
3, CaSO
3Air (oxygen wherein) with the feeding of oxidation air pipeline reacts again, generates CaSO
4, relevant reaction equation is as follows:
1) SO
2+ H
2O → H
2SO
3Absorb
2) CaCO
3+ H
2SO
3→ CaSO
3+ CO
2+ H
2The O neutralization
3) CaSO
3+ 1/2 O
2→ CaSO
4Oxidation
4) CaSO
3+ 1/2 H
2O → CaSO
31/2H
2The O crystallization
5) CaSO
4+ 2H
2O → CaSO
42H
2The O crystallization
6) CaSO
3+ H
2SO
3→ Ca (HSO
3)
2PH control
From above-mentioned reaction as can be known, because reaction 2) be the key reaction of desulfurization, and it is reversible reaction, augmenting response 3) reaction rate, quickening CaSO
3Be converted into CaSO
4Speed, can make reaction 2) positive reaction speed increase, favourable to the desulphurizing ability that increases whole device.
But in the existing wet flue gas desulfurizer, the oxidation air pipeline is positioned at agitator top, and the air that the oxidation air pipeline feeds forms air pocket in the limestone slurry liquid pool, does not rise through the stirring fragmentation of agitator is just past, with the CaSO that generates
3Reaction because reaction contact is abundant inadequately, makes reaction 3) reaction rate lower, CaSO
3Conversion rate lower, thereby make the reaction 2) positive reaction speed lower, the desulphurizing ability of whole device is not ideal enough.Particularly working as used coal of boiler combustion and design coal exists than big-difference, cause in the flue gas sulfur content to be higher than design load and needs when increasing desulphurizing ability, common way is to improve liquid-gas ratio to strengthen spray flux, thereby need to increase the volume of limestone slurry liquid pool, come augmenting response 2 by the amount that increases lime stone slurry) positive reaction speed, but this remodeling method cost height, effect is also not obvious.
Therefore, need improve existing wet flue gas desulfurizer, when increasing desulphurizing ability, need not device is carried out big transformation, minimizing equipment drops into, and reduces manufacturing cost.
Summary of the invention
In view of this, the utility model provides a kind of wet flue gas desulfurizer, when increasing desulphurizing ability, need not device is carried out big transformation, and minimizing equipment drops into, and reduces manufacturing cost.
Wet flue gas desulfurizer of the present utility model, comprise the desulfuration absorbing tower that is provided with air inlet and gas outlet, the limestone slurry liquid pool that is arranged at desulfuration absorbing tower inner chamber bottom and lime stone slurry circulated sprinkling system, be provided with oxidation air pipeline and at least one agitator in the described limestone slurry liquid pool, the oxidation air pipeline is communicated with oxidation fan, agitator is connected with stirring motor, and described agitator is positioned at the oxidation air conduit upper.
Further, described lime stone slurry circulated sprinkling system comprises circulating pump that is communicated with the limestone slurry liquid pool and the spray piping that stretches into desulfuration absorbing tower inner chamber top that is communicated with circulating pump;
Further, top, described desulfuration absorbing tower internal sparger pipe road is provided with demister.
The beneficial effects of the utility model are: in the wet flue gas desulfurizer of the present utility model, agitator is positioned at the oxidation air conduit upper, the air that the oxidation air pipeline feeds forms air pocket in the limestone slurry liquid pool, when rising, be stirred the device stirring and be broken for small bubble, oxygen in the small bubble and CaSO
3Haptoreaction generates CaSO
4Compared with prior art,, increased the mass transfer area of oxygen in the bubble, accelerated the rate of dissolution of oxygen, improved the content of oxygen in the slurries, impelled reaction 3 because small bubble ratio surface area is very big) to the positive direction acceleration, accelerated CaSO
3Be converted into CaSO
4Speed because reaction 3) speed increases and to cause CaSO in the slurries
3Content reduces rapidly, thereby makes reaction 2) positive reaction speed increase, increased the desulphurizing ability of whole device; Simultaneously, when transforming existing wet flue gas desulfurizer as the utility model, only need less change, and need not increase equipment input, cost is lower.
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 a 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 a structural representation of the present utility model, as shown in the figure, wet flue gas desulfurizer of the present utility model, comprise the desulfuration absorbing tower 1 that is provided with air inlet 11 and gas outlet 12, be arranged at the limestone slurry liquid pool 2 and the lime stone slurry circulated sprinkling system of desulfuration absorbing tower 1 inner chamber bottom, be provided with in the described limestone slurry liquid pool 2 among oxidation air pipeline 3 and at least one agitator 4(figure and only draw one, in order to increase mixing effect, agitator 4 can be for a plurality of), oxidation air pipeline 3 is communicated with oxidation fan 5, agitator 4 is connected with stirring motor 6, and described agitator 4 is positioned at oxidation air pipeline 3 tops.
Described lime stone slurry circulated sprinkling system comprises circulating pump 7 that is communicated with limestone slurry liquid pool 2 and the spray piping 8 that stretches into desulfuration absorbing tower 1 inner chamber top that is communicated with circulating pump 7; Described circulating pump 7 can be for one or more; Described spray piping 8 can be set to multilayer, and the multilayer spray makes that the desulfurization performance of desulfuration absorbing tower is very high, on the described spray piping 8 nozzle can also be set, and increases spray effect.
8 tops, described desulfuration absorbing tower 1 internal sparger pipe road can also be provided with demister 9, and demister 9 is used for removing the moisture of flue gas.
The utility model is when operation, by lime stone slurry circulated sprinkling system, spray and descend above being promoted to the lime stone slurry in the limestone slurry liquid pool 2 in the desulfuration absorbing tower 1, lime stone slurry drop and flue gas (the flow of flue gas direction is shown in arrow among the figure) haptoreaction generates CaSO
3, simultaneously, the air that feeds from oxidation air pipeline 3 forms air pocket in limestone slurry liquid pool 2, is stirred device 4 stirrings and is broken for small bubble, oxygen in the small bubble and CaSO when rising
3Haptoreaction generates CaSO
4Compared with prior art,, increased the mass transfer area of oxygen in the bubble, accelerated the rate of dissolution of oxygen, improved the content of oxygen in the slurries, impelled reaction 3 because small bubble ratio surface area is very big) to the positive direction acceleration, accelerated CaSO
3Be converted into CaSO
4Speed because reaction 3) speed increases and to cause CaSO in the slurries
3Content reduces rapidly, thereby makes reaction 2) positive reaction speed increase, increased the desulphurizing ability of whole device; Simultaneously, when transforming existing wet flue gas desulfurizer as the utility model, only need reduce the height of oxidation air pipeline 3, agitator 4 is set at an upper portion thereof, change lessly, and need not increase equipment input, cost is lower.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, 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 the spirit and scope of the present utility model that do not depart from appended claims and limited.
Claims (3)
1. wet flue gas desulfurizer, comprise the desulfuration absorbing tower (1) that is provided with air inlet (11) and gas outlet (12), the limestone slurry liquid pool (2) that is arranged at desulfuration absorbing tower (1) inner chamber bottom and lime stone slurry circulated sprinkling system, be provided with oxidation air pipeline (3) and at least one agitator (4) in the described limestone slurry liquid pool (2), oxidation air pipeline (3) is communicated with oxidation fan (5), agitator (4) is connected with stirring motor (6), it is characterized in that: described agitator (4) is positioned at oxidation air pipeline (3) top.
2. wet flue gas desulfurizer according to claim 1 is characterized in that: described lime stone slurry circulated sprinkling system comprises circulating pump (7) that is communicated with limestone slurry liquid pool (2) and the spray piping (8) that stretches into desulfuration absorbing tower (1) inner chamber top that is communicated with circulating pump (7).
3. wet flue gas desulfurizer according to claim 2 is characterized in that: top, described desulfuration absorbing tower (1) internal sparger pipe road (8) is provided with demister (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200357646U CN201930713U (en) | 2011-02-10 | 2011-02-10 | Wet flue gas desulfurizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200357646U CN201930713U (en) | 2011-02-10 | 2011-02-10 | Wet flue gas desulfurizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201930713U true CN201930713U (en) | 2011-08-17 |
Family
ID=44442253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200357646U Expired - Lifetime CN201930713U (en) | 2011-02-10 | 2011-02-10 | Wet flue gas desulfurizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201930713U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432869A (en) * | 2013-08-26 | 2013-12-11 | 瓮福（集团）有限责任公司 | Low-concentration sulfur dioxide absorption tower |
| CN107670618A (en) * | 2017-10-24 | 2018-02-09 | 徐州市全中电力科技有限公司 | A kind of array oxidation wind induction system |
| CN109107228A (en) * | 2017-06-26 | 2019-01-01 | 大唐环境产业集团股份有限公司 | A kind of desulfuration absorbing tower automatic defoaming device and debubbling method |
-
2011
- 2011-02-10 CN CN2011200357646U patent/CN201930713U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432869A (en) * | 2013-08-26 | 2013-12-11 | 瓮福（集团）有限责任公司 | Low-concentration sulfur dioxide absorption tower |
| CN109107228A (en) * | 2017-06-26 | 2019-01-01 | 大唐环境产业集团股份有限公司 | A kind of desulfuration absorbing tower automatic defoaming device and debubbling method |
| CN107670618A (en) * | 2017-10-24 | 2018-02-09 | 徐州市全中电力科技有限公司 | A kind of array oxidation wind induction system |
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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 |
Granted publication date: 20110817 |
|
| CX01 | Expiry of patent term |