CN206454472U - A kind of flue gas mercury removal device - Google Patents
A kind of flue gas mercury removal device Download PDFInfo
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- CN206454472U CN206454472U CN201720101067.3U CN201720101067U CN206454472U CN 206454472 U CN206454472 U CN 206454472U CN 201720101067 U CN201720101067 U CN 201720101067U CN 206454472 U CN206454472 U CN 206454472U
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- China
- Prior art keywords
- waste water
- flue gas
- water tank
- removal device
- mercury removal
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Abstract
A kind of flue gas mercury removal device, for in the flue gas demercuration of coal-burning power plant, including denitrator, deduster and desulfurizing tower, desulfurization tower bottom is provided with waste water tank, pipeline is provided with the middle part of the waste water tank, the other end of pipeline is parallel with n atomizer, waste water tank is externally provided with vulcanized sodium pond, the utility model is collected utilization to the waste water after desulfurization by setting waste water tank in desulfurization tower bottom, sets atomizer, the waste water of collection is sprayed by atomizer into flue, the contact area of the liquid of spray pattern, increase liquid and flue gas, makes reaction more abundant.In a word, the utility model is simple in construction, it is adaptable to industrialized production.
Description
Technical field
The utility model provides a kind of flue gas mercury removal device, is particularly suitable for use in the flue gas demercuration of coal-burning power plant, belongs to waste gas
Processing technology field.
Background technology
Coal produces compared with multi-pollutant as topmost fuel in power plant combustion, mainly there is SO in combustion2、
CO, nitrogen oxides etc., Hg are one of trace elements in coal, and it discharges into the atmosphere with burning of coal with flue gas.Due to Hg
Pollutant has stronger physiological-toxicity and bioaccumulation, and high risks can be produced to human and environment, therefore various countries are to flue gas
Middle Hg content has strict emission standards.
Hg in flue gas has three kinds of existing forms, is respectively：HgP, Hg0, Hg2+, its discharge ratio is respectively 16%, 61%
With 23%.In the mercury element of three kinds of forms, HgPIt can be removed, Hg by particulate control device (such as electrostatic precipitator)2+It can lead to
Absorption method, washing method is crossed to remove, and Hg0It is difficult to directly remove, at present generally Hg0It is oxidized to Hg2+, and then Hg is all de-
Remove.
Utility model content
The utility model, there is provided a kind of flue gas mercury removal device, is given up according to the drawback of prior art by being sprayed into flue gas
Water, Hg0It is oxidized to Hg2+, vulcanized sodium is added, Hg2+Precipitate and discharge.
Technical problem described in the utility model is solved by the following technical programs：
A kind of flue gas mercury removal device, including denitrator, deduster and desulfurizing tower, the denitrator, deduster and desulfurizing tower
It is sequentially connected by flue, desulfurization tower bottom is provided with the middle part of waste water tank, the waste water tank and is provided with waste pipe, waste pipe
The other end be parallel with n atomizer, waste water tank is externally provided with vulcanized sodium pond, and vulcanized sodium pond is connected with waste water tank by jet
Connect.
Above-mentioned flue gas mercury removal device, is sequentially provided with filter, fluid reservoir and water pump between the waste water tank and atomizer.
Above-mentioned flue gas mercury removal device, the waste water pot bottom is provided with pipeline, and pipeline connects desulfurizing tower by water pump.
Above-mentioned flue gas mercury removal device, the atomizer number n is 6-9, and it is distributed as：Denitrator front portion sets one group, one
Group 1-2, sets one group, one group 3-4, one group, one group 2-3 is set before desulfurizing tower before deduster.
Preheater is provided with after above-mentioned flue gas mercury removal device, the denitrator, the warm area of denitrator is 600-700 DEG C, preheating
The warm area of device is 300-500 DEG C, and the warm area of deduster is 150-300 DEG C.
Above-mentioned flue gas mercury removal device, the waste pipe (16) is provided with air compressor.
The utility model has advantages below：
The utility model is collected utilization to the waste water after desulfurization by setting waste water tank in desulfurization tower bottom, sets
Atomizer, the waste water of collection is sprayed by atomizer into flue, the liquid of spray pattern, increase liquid and flue gas
Contact area, make reaction more abundant, atomizer be provided with three groups, the diverse location of flue is separately positioned on, to Hg in flue gas0
Repeatedly aoxidized, make Hg in flue gas0Oxidation is complete；Vulcanized sodium pond is set outside waste water tank, NaS is sprayed into waste water tank, is made
Hg2+Precipitation, so as to realize the removing of mercury in flue gas.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
The label of each in figure is expressed as：1st, boiler, 2, denitrator, 3, preheater, 4, deduster, 5, desulfurizing tower, 6,
Chimney, 7, waste water tank, 8, fluid reservoir, 9, water pump, 10, air compressor, 11, atomizer, 12, vulcanized sodium pond, 13, filtering
Device, 14, jet, 15, flue, 16, waste pipe.
Embodiment
A kind of flue gas mercury removal device, including denitrator 2, deduster 4 and desulfurizing tower 5, the denitrator 2, deduster 4 are with taking off
Sulphur tower 5 is sequentially connected by flue 15, and the bottom of desulfurizing tower 5 is provided with waste water tank 7, and the middle part of waste water tank 7 is provided with waste pipe
Road, the other end of waste pipe is parallel with n atomizer 11, and atomizer 11 is located in flue 15, the peripheral hardware of waste water tank 7
There is vulcanized sodium pond 12, vulcanized sodium pond 12 is connected with waste water tank 7 by jet 14.The flue gas discharged in boiler 1, via cigarette
Feed channel is by denitrator 2, and the warm area of denitrator 2 is 600-700 DEG C, for removing nitride in flue gas, passes through dedusting afterwards
Device 4, deduster removes Hgp (particle mercury) by electrostatic interaction, finally by desulfurizing tower 5, removes the sulfide in flue gas,
Atomizer 11 sprays into remaining desulfurization wastewater in desulfurizing tower 5 into pipeline, and desulfurization wastewater contains Cl-、Cu2+Plasma, makes Hg0
It is oxidized to Hg2+, vulcanized sodium, Hg are sprayed into waste water tank 72+In waste water tank 7, precipitate and gone with vulcanized sodium generation solid
Remove.
Filter 13, fluid reservoir 8 and water pump 9 are sequentially provided between the waste water tank 7 and atomizer 11, in order to prevent mist
Change nozzle 11 to be blocked by the solid particle in waste water, the setting filter 13 between waste water tank 7 and atomizer 11, and fluid reservoir
8 waste water being used for after stored filter, the wastewater flow for spraying atomizer 11 is stable.
The bottom of waste water tank 7 is provided with pipeline, and pipeline connects desulfurizing tower 5 by water pump 9, partial desulfurization waste liquid can beaten
It is back in desulfurizing tower and is reused, improves the utilization rate of desulfurization waste liquor.
The number of atomizer 11 n is 6-9, and it is distributed as：Denitrator 2 is anterior to set one group, one group 1-2, deduster
One group is set before 4, one group 3-4, one group is set before desulfurizing tower 5, one group 2-3, atomizer is into multigroup distribution, in flue gas
Hg0Repeatedly aoxidized, to ensure the Hg in flue gas0It is fully oxidized and dispels.
Preheater 3 is provided with after the denitrator 2, the warm area of denitrator 2 is 600-700 DEG C, at this temperature, Hg0By oxygen
Turn to Hg2+Efficiency up to more than 98%, the warm area of preheater 3 is 300-500 DEG C, at this temperature, Hg0It is oxidized to Hg2+'s
Efficiency is up to more than 97%, and the warm area of deduster 4 is 150-300 DEG C, at this temperature, Hg0It is oxidized to Hg2+Efficiency up to 40%
Left and right.The waste pipe 16 is provided with air compressor 10.
Claims (6)
1. a kind of flue gas mercury removal device, including denitrator (2), deduster (4) and desulfurizing tower (5), it is characterised in that the denitration
Device (2), deduster (4) are sequentially connected with desulfurizing tower (5) by flue (15), and desulfurizing tower (5) bottom is provided with waste water tank
(7) waste pipe (16), is provided with the middle part of the waste water tank (7), the other end of waste pipe (16) is parallel with n atomizer
(11), waste water tank (7) is externally provided with vulcanized sodium pond (12), and vulcanized sodium pond (12) are connected with waste water tank (7) by jet (14).
2. a kind of flue gas mercury removal device according to claim 1, it is characterised in that the waste water tank (7) and atomizer
(11) filter (13), fluid reservoir (8) and water pump (9) are sequentially provided between.
3. a kind of flue gas mercury removal device according to claim 2, it is characterised in that waste water tank (7) bottom is provided with pipe
Road, pipeline connects desulfurizing tower (5) by water pump (9).
4. a kind of flue gas mercury removal device according to claim 3, it is characterised in that atomizer (11) the number n is 6-
9, it is distributed as：Denitrator (2) front portion sets one group, and one group 1-2, deduster (4) is preceding to set one group, one group 3-4, desulfurization
One group, one group 2-3 is set before tower (5).
5. a kind of flue gas mercury removal device according to claim 4, it is characterised in that the denitrator (2) is afterwards provided with preheating
Device (3), the warm area of denitrator (2) is 600-700 DEG C, and the warm area of preheater (3) is 300-500 DEG C, and the warm area of deduster (4) is
150-300℃。
6. a kind of flue gas mercury removal device according to claim 5, it is characterised in that the waste pipe (16) is provided with sky
Air compressor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720101067.3U CN206454472U (en) | 2017-01-24 | 2017-01-24 | A kind of flue gas mercury removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720101067.3U CN206454472U (en) | 2017-01-24 | 2017-01-24 | A kind of flue gas mercury removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206454472U true CN206454472U (en) | 2017-09-01 |
Family
ID=59695196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720101067.3U Active CN206454472U (en) | 2017-01-24 | 2017-01-24 | A kind of flue gas mercury removal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930359A (en) * | 2017-12-21 | 2018-04-20 | 华北电力大学（保定） | The apparatus and method that elemental mercury in coal-fired flue-gas is removed using desulfurization wastewater |
| CN110801723A (en) * | 2019-10-17 | 2020-02-18 | 浙江浙能技术研究院有限公司 | Method for removing SO in coal-fired flue gas by base injection3Pilot test device and method |
-
2017
- 2017-01-24 CN CN201720101067.3U patent/CN206454472U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107930359A (en) * | 2017-12-21 | 2018-04-20 | 华北电力大学（保定） | The apparatus and method that elemental mercury in coal-fired flue-gas is removed using desulfurization wastewater |
| CN110801723A (en) * | 2019-10-17 | 2020-02-18 | 浙江浙能技术研究院有限公司 | Method for removing SO in coal-fired flue gas by base injection3Pilot test device and method |
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