CN201586477U - Limestone-plaster wet-method multiple-pollutant simultaneous removing device - Google Patents
Limestone-plaster wet-method multiple-pollutant simultaneous removing device Download PDFInfo
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- CN201586477U CN201586477U CN200920200027XU CN200920200027U CN201586477U CN 201586477 U CN201586477 U CN 201586477U CN 200920200027X U CN200920200027X U CN 200920200027XU CN 200920200027 U CN200920200027 U CN 200920200027U CN 201586477 U CN201586477 U CN 201586477U
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- absorption liquid
- pump
- storage tank
- spray
- spray column
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Abstract
The utility model discloses a limestone-plaster wet-method multiple-pollutant simultaneous removing device, which comprises an absorption liquid slurry tank, a booster fan, a spray tower and the like. Absorption liquid for wet-method desulfuration is prepared by mixing strong oxidizer and high-efficient absorbent, flue gas enters the spray tower after power is supplied via the booster fan, the middle upper portion of the spray tower is provided with two to four spray layers which uniformly spray the absorption liquid into the spray tower and lead the absorption liquid to sufficiently contact with the flue gas, and the absorption liquid in an absorption liquid storage tank is recycled under action of an absorption liquid recycling pump. The upper portions of the spray layers are provided with demisters to remove water vapor in the flue gas, and the flue gas with water vapor removed by the demisters is discharged from the top portion of the spray tower to a chimney and then discharged externally. The limestone-plaster wet-method multiple-pollutant simultaneous removing device has the following advantages of 1), being capable of simultaneously removing pluralities of pollutants by only utilizing one limestone-plaster method technique, 2), being capable of selecting multiple types of oxidizing agents, and 3), having high pollutant removing efficiency.
Description
Technical field
The utility model belongs to the energy environment protection technical field, relates in particular to the multiple pollutant of a kind of limestone-gypsum wet method and removes device simultaneously.
Background technology
The supply of the electric power energy of China's overwhelming majority comes from the coal-burning power plant, and in one quite long from now on period, coal fired power generation is still the main supply of electric power mode of China.Coal dust can produce multiple pollutant in combustion power generation, as: sulfur dioxide, nitrogen oxide, hydrogen chloride, hydrogen fluoride, mercury metal etc.This pollutant is very serious to the harm of environment, so State Bureau of Environmental Protection is in the requirement of constantly strictly regulating coal-burning power plant's all contaminations discharging.
Handle coal-burning power plant's sulfur dioxide at present, hydrogen chloride, the major technique of hydrogen fluoride discharging is a limestone-gypsum method, and the major technique of handling discharged nitrous oxides is the SCR technology, and the method for handling mercury metal is mainly utilizes the adsorbent demercuration.Therefore to remove multiple pollutant simultaneously at present, will need three kinds of technical tie-ups to use, this can make power plant drop into the expense of writing on its exhaust gas processing device, and the operation and maintenance of its exhaust treatment system also can become suitable complexity, has increased operating cost.
At above-mentioned situation, can make it realize sulfur dioxide simultaneously by a kind of technology is wherein improved, nitrogen oxide, hydrogen chloride, hydrogen fluoride, the removing of mercury metal.Consider of the extensive use of desulfurization method of limestone-gypsum technology, therefore, can control the expense of saving writing more for the pollutant of power plant if can realize taking off of limestone-gypsum law technology by improving with this technology as the basis in power plants.
Conventional at present limestone-gypsum method can remove sulfur in smoke, hydrogen chloride, hydrogen fluoride, but very undesirable to the removal effect of nitrogen oxide and mercury metal, this is because the nitrogen oxide in the flue gas comprises nitric oxide and nitrogen dioxide, based on nitric oxide.The main existence form of mercury metal in flue gas is simple substance mercury and divalence mercury compound.Wherein nitrogen dioxide and divalence mercury are more soluble in water, can in the spray column of limestone-gypsum method, be removed, but nitric oxide and simple substance mercury are insoluble in water, these two kinds of materials can't be removed in spray column, and Here it is, and why limestone-gypsum method is to nitrogen oxide and the unfavorable reason of mercury metal removal effect.
At above-mentioned reason, by in absorption liquid, also add oxidant (as hypochlorite, chlorate, perchlorate, permanganate, bichromate, hydrogen peroxide), the nitric oxide that is insoluble in water is become nitrogen dioxide and divalence mercury more soluble in water with the simple substance mercury oxidation, so just can realize utilizing limestone-gypsum method to remove sulfur in smoke simultaneously, hydrogen chloride, hydrogen fluoride, nitrogen oxide and mercury metal.
Because present technique only needs to increase the oxidant add-on system on the basis of original limestone-gypsum method equipment, so improvement expenses is low, pollutant removal is good, should vigorously promote the use.
Summary of the invention
The purpose of this utility model is can't remove this technical deficiency of multiple pollutant simultaneously at existing limestone-gypsum law technology, provides the multiple pollutant of a kind of limestone-gypsum wet method to remove device simultaneously.
The multiple pollutant of limestone-gypsum wet method removes device simultaneously and comprises the oxidant storage tank, the oxidant magnetic valve, the absorption liquid serum pot, booster fan, the agstone storage tank, the lime stone magnetic valve, slush pump, demister, spraying layer, spray column, the absorption liquid storage tank, the calcium plaster liquid pump, the technology water pump, the technology water tank, the absorption liquid circulating pump, flue gas passes through booster fan, enter spray column from the middle part of spray column, spray column sprays flue gas and absorbs after discharge from chimney after the demister demist on spray column top, and the absorption liquid behind the spray flows into the absorption liquid storage tank of spray column bottom, recycling by the absorption liquid circulating pump, and unnecessary absorption liquid is discharged by the calcium plaster liquid pump; The spray column absorption liquid is replenished by slush pump by the absorption liquid serum pot, the absorption liquid serum pot is regulated mixing by oxidant storage tank and agstone storage tank through oxidant magnetic valve and lime stone magnetic valve, fresh water (FW) is replenished by the technology water pump by the technology water tank, be demister above spraying layer, the shower water of demister is provided by the technology water pump by the technology water tank.
The spray column system comprises demister, spraying layer, absorption liquid storage tank, calcium plaster liquid pump, absorption liquid circulating pump, technology water pump, slush pump, the spray absorption liquid is delivered in the absorption liquid storage tank by slush pump, absorption liquid is delivered to spraying layer by the absorption liquid circulating pump and is sprayed, spray back absorption liquid returns in the absorption liquid storage tank, unnecessary absorption liquid is discharged by the calcium plaster liquid pump, and fresh water (FW) is pumped to demister to gas demist after spraying by the technology water tank through fresh water (FW).
The beneficial effect that the utility model compared with prior art has:
Remove when 1) only adopting a kind of limestone-gypsum law technology just can realize multiple pollutant, simplified the thermal power plant tail gas treatment process greatly, saved investment cost and operating cost;
2) alternative oxidant kind is many, mainly contains hypochlorite, chlorate, and perchlorate, permanganate, bichromate, hydrogen peroxide can carry out the purchasing of raw materials easily in actual motion;
3) adopt the most frequently used limestone-gypsum method of thermal power plant to remove the basic technology of technology simultaneously, greatly facilitate the improvement project of a lot of power plant, be worthy to be popularized as multiple pollution;
4) pollutant removing efficient height, the removal efficiency of all contaminations all can reach more than 95%.
Description of drawings
The multiple pollutant of accompanying drawing limestone-gypsum wet method removes the device and method structural representation simultaneously;
Among the figure: oxidant storage tank 1, oxidant magnetic valve 2, absorption liquid serum pot 3, booster fan 4, agstone storage tank 5, lime stone magnetic valve 6, slush pump 7, demister 8, spraying layer 9, spray column 10, absorption liquid storage tank 11, calcium plaster liquid pump 12, technology water pump 13, technology water tank 14, absorption liquid circulating pump 15.
The specific embodiment
As shown in drawings, the multiple pollutant of limestone-gypsum wet method removes device simultaneously and comprises oxidant storage tank 1, oxidant magnetic valve 2, absorption liquid serum pot 3, booster fan 4, agstone storage tank 5, lime stone magnetic valve 6, slush pump 7, demister 8, spraying layer 9, spray column 10, absorption liquid storage tank 11, calcium plaster liquid pump 12, technology water pump 13, technology water tank 14, absorption liquid circulating pump 15, flue gas is by booster fan 4, enter spray column 10 from the middle part of spray column 10,10 pairs of flue gases of spray column spray and absorb after discharge from chimney after demister 8 demists on spray column 10 tops, and the absorption liquid behind the spray flows into the absorption liquid storage tank 11 of spray column 10 bottoms, recycling by absorption liquid circulating pump 15, and unnecessary absorption liquid is discharged by calcium plaster liquid pump 12; The spray column absorption liquid is replenished by slush pump 7 by absorption liquid serum pot 3, absorption liquid serum pot 3 is regulated mixing by oxidant storage tank 1 and agstone storage tank 5 through oxidant magnetic valve 2 and lime stone magnetic valve 6, fresh water (FW) is replenished by technology water pump 13 by technology water tank 14, be demister 8 above spraying layer 9, the shower water of demister is provided by technology water pump 13 by technology water tank 14.
The multiple pollutant of limestone-gypsum wet method removal methods simultaneously is: the flue gas from boiler replenishes power through booster fan 4 earlier, middle part from spray column 10 enters spray column 10 then, the middle and upper part of spray column 10 is provided with 2～4 layers of spraying layer, the effect of spraying layer is to be that 10～18 absorption liquids are sprayed onto in the spray column 10 uniformly with liquid-gas ratio, absorption liquid is fully contacted with flue gas, the absorption liquid of spray falls into the absorption liquid storage tank 11 at 10 ends of spray column, under the effect of absorption liquid circulating pump 15, absorption liquid is recycling.Spraying layer top is provided with demister 8, be used for removing the steam of flue gas, technology water tank 14 can replenish fresh water (FW) by the absorption liquid storage tank 11 of demister 8 to 10 ends of spray column, absorb the slurry preparation device and can at the bottom of tower, replenish fresh absorption liquid by absorption liquid storage tank 11, absorption liquid storage tank 11 also is provided with calcium plaster liquid pump 12 and is used to discharge slurries, and the flue gas of process demister 8 demists is expelled to chimney and discharges from spray column 10 tops.
The absorption liquid preparation facilities comprises the agstone storage tank, absorption liquid serum pot, slush pump, oxidant storage tank.Oxidisability additive and agstone drop in the absorption liquid serum pot under electric control valve control separately by a certain percentage, add fresh water (FW) in proportion simultaneously, are configured to absorption liquid under the effect of Mixing Machine.Absorption liquid is delivered to the spray liquid storage tank of spray column bottom via slush pump.
Comparatively desirable oxidisability additive has hypochlorite, chlorate, perchlorate, permanganate, bichromate, hydrogen peroxide.These oxidation additives are made absorption liquid after injecting absorbent slurry jar and lime stone slurry mixing by the metered flow meter.
If select for use hypochlorite as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
ClO
-+Hg+H
2O＝Hg(OH)
2+Cl
-
ClO
-+NO＝NO
2+Cl
-
If select for use chlorate as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
ClO
3 -+3Hg+3H
2O＝3Hg(OH)
2+Cl
-
ClO
3 -+3NO＝3NO
2+Cl
-
If select for use perchlorate as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
ClO
4 -+4Hg+4H
2O＝4Hg(OH)
2+Cl
-
ClO
4 -+4NO＝4NO
2+Cl
-
If select for use permanganate as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
2MnO
4 -+3Hg+2H
2O＝3Hg(OH)
2+2OH
-+2MnO
2
MnO
4 -+NO＝NO
3 -+MnO
2
If select for use bichromate as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
Cr
2O
7 2-+3Hg+3H
2O＝2CrO
2 -+3Hg(OH)
2
Cr
2O
7 2-+3NO＝3NO
2+2CrO
2 -
If select for use hydrogen peroxide as oxidation additive, it is as follows that the oxidation equation formula takes place in the spray column:
H
2O
2+Hg＝Hg(OH)
2
H
2O
2+NO＝NO
2+H
2O
Claims (2)
1. the multiple pollutant of limestone-gypsum wet method removes device simultaneously, it is characterized in that comprising oxidant storage tank (1), oxidant magnetic valve (2), absorption liquid serum pot (3), booster fan (4), agstone storage tank (5), lime stone magnetic valve (6), slush pump (7), demister (8), spraying layer (9), spray column (10), absorption liquid storage tank (11), calcium plaster liquid pump (12), technology water pump (13), technology water tank (14), absorption liquid circulating pump (15), flue gas is by booster fan (4), enter spray column (10) from the middle part of spray column (10), spray column (10) sprays flue gas and absorbs after discharge from chimney after demister (8) demist on spray column (10) top, and the absorption liquid behind the spray flows into the absorption liquid storage tank (11) of spray column (10) bottom, recycling by absorption liquid circulating pump (15), and unnecessary absorption liquid is discharged by calcium plaster liquid pump (12); The spray column absorption liquid is replenished by slush pump (7) by absorption liquid serum pot (3), absorption liquid serum pot (3) is regulated mixing by oxidant storage tank (1) and agstone storage tank (5) through oxidant magnetic valve (2) and lime stone magnetic valve (6), fresh water (FW) is replenished by technology water pump (13) by technology water tank (14), in the top of spraying layer (9) is demister (8), and the shower water of demister is provided by technology water pump (13) by technology water tank (14).
2. remove device simultaneously according to the multiple pollutant of the described limestone-gypsum wet method of claim 1, it is characterized in that described spray column (10) system comprises demister (8), spraying layer (9), absorption liquid storage tank (11), calcium plaster liquid pump (12), absorption liquid circulating pump (15), technology water pump (14), slush pump (7), the spray absorption liquid is delivered in the absorption liquid storage tank (11) by slush pump (7), absorption liquid is delivered to spraying layer (9) by absorption liquid circulating pump (15) and is sprayed, spray back absorption liquid returns in the absorption liquid storage tank (11), unnecessary absorption liquid is discharged by calcium plaster liquid pump (12), and fresh water (FW) is delivered to demister (8) to gas demist after spraying by the technology water tank through technology water pump (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920200027XU CN201586477U (en) | 2009-11-16 | 2009-11-16 | Limestone-plaster wet-method multiple-pollutant simultaneous removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920200027XU CN201586477U (en) | 2009-11-16 | 2009-11-16 | Limestone-plaster wet-method multiple-pollutant simultaneous removing device |
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| Publication Number | Publication Date |
|---|---|
| CN201586477U true CN201586477U (en) | 2010-09-22 |
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|---|---|---|---|
| CN200920200027XU Expired - Lifetime CN201586477U (en) | 2009-11-16 | 2009-11-16 | Limestone-plaster wet-method multiple-pollutant simultaneous removing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139873A (en) * | 2016-08-22 | 2016-11-23 | 哈尔滨蔚蓝环保设备制造有限公司 | A kind of desulfurization by lime gypsum method device |
-
2009
- 2009-11-16 CN CN200920200027XU patent/CN201586477U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139873A (en) * | 2016-08-22 | 2016-11-23 | 哈尔滨蔚蓝环保设备制造有限公司 | A kind of desulfurization by lime gypsum method device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100922 Effective date of abandoning: 20091116 |