CN209809917U - Be used for coal-fired steam power plant boiler flue gas demercuration purifier - Google Patents
Be used for coal-fired steam power plant boiler flue gas demercuration purifier Download PDFInfo
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- CN209809917U CN209809917U CN201920334650.8U CN201920334650U CN209809917U CN 209809917 U CN209809917 U CN 209809917U CN 201920334650 U CN201920334650 U CN 201920334650U CN 209809917 U CN209809917 U CN 209809917U
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- CN
- China
- Prior art keywords
- flue gas
- mercury
- storage tank
- coal
- power plant
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000003546 flue gas Substances 0.000 title claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 102
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 53
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000001704 evaporation Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000002087 whitening effect Effects 0.000 description 8
- DOBUSJIVSSJEDA-UHFFFAOYSA-L 1,3-dioxa-2$l^{6}-thia-4-mercuracyclobutane 2,2-dioxide Chemical compound [Hg+2].[O-]S([O-])(=O)=O DOBUSJIVSSJEDA-UHFFFAOYSA-L 0.000 description 6
- 229940074994 mercuric sulfate Drugs 0.000 description 6
- 229910000372 mercury(II) sulfate Inorganic materials 0.000 description 6
- QXKXDIKCIPXUPL-UHFFFAOYSA-N sulfanylidenemercury Chemical compound [Hg]=S QXKXDIKCIPXUPL-UHFFFAOYSA-N 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 5
- 241000276489 Merlangius merlangus Species 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a be used for coal-fired steam power plant boiler flue gas demercuration purifier, include: the system comprises a white removal tower, a mercury-containing liquid storage tank communicated to the white removal tower for collecting solution in the white removal tower, an evaporator for evaporating the solution to form a mixture of concentrated solution and secondary steam, a liquid inlet pump communicated with the mercury-containing liquid storage tank and the evaporator for conveying the solution in the mercury-containing liquid storage tank to the evaporator, a separator for performing gas-liquid separation on the concentrated solution and the secondary steam formed by the evaporator, a heat exchanger for heating flue gas generated by the white removal tower by using the secondary steam separated by the separator, a cyclone separator for performing solid-liquid separation on liquid at the bottom of the separator and heating the liquid flowing out of the cyclone separator by using the liquid flowing into the cyclone separator. The utility model discloses an useful part lies in optimizing pollutant treatment process, saves heat energy consumption, effectively demercuration and can carry out recycle to the pollutant.
Description
Technical Field
The utility model relates to a be used for coal-fired steam power plant boiler flue gas demercuration purifier.
Background
The flue gas discharged by the coal-fired boiler contains mercury, and the direct discharge causes serious pollution to the atmosphere, so that the mercury removal treatment is required.
The traditional demercuration treatment has high cost and serious heat energy loss.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of prior art, the utility model provides a be used for coal-fired steam power plant boiler flue gas demercuration purifier has optimized pollutant treatment process, saves heat energy consumption, can carry out recycle to the pollutant.
In order to achieve the above object, the utility model adopts the following technical scheme:
a mercury removal and purification device for boiler flue gas of a coal-fired thermal power plant comprises: the system comprises a whitening tower, a mercury-containing liquid storage tank communicated with the whitening tower for collecting solution in the whitening tower, an evaporator for evaporating the solution to form a mixture of concentrated solution and secondary steam, a liquid inlet pump communicated with the mercury-containing liquid storage tank and the evaporator for conveying the solution in the mercury-containing liquid storage tank to the evaporator, a separator for performing gas-liquid separation on the concentrated solution and the secondary steam formed by the evaporator, a heat exchanger for heating flue gas generated by the whitening tower by using the secondary steam separated by the separator, a cyclone separator for performing solid-liquid separation on liquid at the bottom of the separator and flowing the separated liquid into the mercury-containing liquid storage tank, a liquid outlet pump for conveying the liquid at the bottom of the separator to the cyclone separator and a heat regenerator for heating the liquid flowing out of the cyclone separator by using the liquid flowing into the cyclone separator; the separator is communicated to the de-whitening tower, so that the concentrated solution at the upper layer separated by the separator flows back to the de-whitening tower by gravity; the cyclone separator is communicated to the mercury-containing liquid storage tank; the evaporator is communicated with the liquid inlet pump and the separator.
Further, a be used for coal-fired steam power plant boiler flue gas demercuration purifier still includes: and the cyclone liquid storage tank is used for collecting the impurities separated by the cyclone separator.
Further, a be used for coal-fired steam power plant boiler flue gas demercuration purifier still includes: a filter pressing device for discharging the sediment deposited in the rotational flow liquid storage tank; the filter pressing device is communicated to the rotational flow liquid storage tank.
And further, the rotational flow liquid storage tank is communicated to a mercury-containing liquid storage tank, and the clear liquid treated by the filter pressing device flows back to the mercury-containing liquid storage tank.
And further, the clear liquid treated by the filter pressing device flows through the heat regenerator and then enters the mercury-containing liquid storage tank.
Further, a be used for coal-fired steam power plant boiler flue gas demercuration purifier still includes: and the stirrer is used for stirring the liquid in the mercury-containing liquid storage tank.
Further, the mercury-containing liquid storage tank is provided with an alkali supplementing opening for supplementing alkali into the tank.
Further, a be used for coal-fired steam power plant boiler flue gas demercuration purifier still includes: and the water condensing device is used for condensing the secondary steam passing through the heat exchanger.
Further, a heat exchanger is communicated to the top of the de-whitening tower. Further, the separator is communicated to the bottom of the whiting tower.
The utility model discloses a zero release of coal-fired thermal power plant flue gas pollutant and filth recovery system that useful part lies in providing optimize pollutant processing technology, save heat energy consumption, can be to pollutant recycle.
The mercury in the flue gas can be converted into mercuric sulfide and mercuric sulfate precipitate for recycling. The secondary steam is utilized to heat the flue gas and the secondary steam condensate can be recycled. The additional heat energy consumption is saved, the operating cost is reduced, the waste heat recovery is realized, and the method has important economic benefits.
Drawings
FIG. 1 is a schematic diagram of a device for removing mercury from boiler flue gas of a coal-fired thermal power plant according to the present invention.
The device is used for a coal-fired thermal power plant boiler flue gas demercuration purification device 100, a white removal tower 1, a heat exchanger 2, a stirrer 3, a mercury-containing liquid storage tank 4, a liquid inlet pump 5, an evaporator 6, a separator 7, a liquid outlet pump 8, a heat regenerator 9, a cyclone separator 10, a cyclone liquid storage tank 11, a filter pressing device 12 and an alkali supplement port 13.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a device 100 for removing mercury from boiler flue gas of coal-fired thermal power plant comprises: the equipment comprises a whitening tower 1, a heat exchanger 2, a stirrer 3, a mercury-containing liquid storage tank 4, a liquid inlet pump 5, an evaporator 6, a separator 7, a liquid outlet pump 8, a heat regenerator 9, a cyclone separator 10, a cyclone liquid storage tank 11 and a filter pressing device 12.
After entering the white-removing tower 1, the flue gas is sprayed by the solution to absorb the moisture in the flue gas. Hg2+, SO2 and other impurities in the flue gas generate mercuric sulfide and mercuric sulfate in the white-removing tower 1.
The mercury-containing liquid storage tank 4 is communicated to the white-removing tower 1 to collect the solution in the white-removing tower 1, and the mercuric sulfide and mercuric sulfate precipitate enter the mercury-containing liquid storage tank 4 and precipitate to the bottom. The stirrer 3 stirs the solution in the mercury-containing liquid storage tank 4. Specifically, the mercury-containing liquid storage tank 4 is provided with an alkali supply port 13 for supplying alkali into the tank.
The liquid inlet pump 5 is communicated with the mercury-containing liquid storage tank 4 and the evaporator 6 to convey the solution in the mercury-containing liquid storage tank 4 to the evaporator 6.
The evaporator 6 evaporates the solution to form a mixture of concentrated solution and secondary steam. The evaporator 6 is communicated with the liquid inlet pump 5 and the separator 7. The separator 7 performs gas-liquid separation of the concentrated solution and the secondary steam formed in the evaporator 6.
The heat exchanger 2 heats the flue gas generated by the white-removing tower 1 by using the secondary steam separated by the separator 7. Specifically, the heat exchanger 2 communicates to the top of the whitening tower 1.
The secondary steam is used for reheating the flue gas, extra energy is not consumed, and the secondary whitening treatment can be performed on the flue gas. Effectively saving heat energy. The water condensing device condenses the secondary steam passing through the heat exchanger 2. The secondary steam condensate can be recycled.
The separator 7 is communicated to the whiting tower 1, so that the concentrated solution at the upper layer separated by the separator 7 flows back to the whiting tower 1 by gravity. The separator 7 communicates to the bottom of the whitening tower 1.
The concentrated solution containing the mercuric sulfide and mercuric sulfate sediment at the bottom of the separator 7 is pumped into a heat regenerator 9 through a liquid outlet pump 8 for cooling and then enters a cyclone separator 10 for solid-liquid separation.
The cyclone separator 10 performs solid-liquid separation of the bottom liquid of the separator 7 and flows the separated liquid into the mercury-containing tank 4. The cyclone separator 10 is connected to the mercury-containing reservoir 4. A liquid outlet pump 8 is used to convey the bottom liquid of the separator 7 to a cyclone separator 10. The liquid returning from the cyclone 10 is heated by the liquid returning from the cyclone 9 into the cyclone 10. The heat energy is also effectively utilized. The turbid liquid is placed still in the cyclone liquid storage tank 11 and then is discharged through a filter pressing device 12 to obtain precipitates such as mercuric sulfide, mercuric sulfate and the like. The clear liquid is heated by the heat regenerator 9 and then returns to the mercury-containing liquid storage tank 4. The cyclone liquid storage tank 11 collects the impurities separated by the cyclone separator 10. The filter pressing device 12 is used for discharging sediment deposited in the cyclone liquid storage tank 11. The filter pressing device 12 is communicated to the rotational flow liquid storage tank 11. The rotational flow liquid storage tank 11 is communicated to the mercury-containing liquid storage tank 4, and the clear liquid treated by the filter pressing device 12 flows back to the mercury-containing liquid storage tank 4. The clear liquid treated by the filter pressing device 12 flows into the mercury-containing liquid storage tank 4 after flowing through the heat regenerator 9.
After the flue gas is purified by the device 100 for removing mercury from the flue gas of the boiler of the coal-fired thermal power plant, the moisture content in the flue gas is reduced by 30-60%, more than 95% of Hg2+ in the flue gas is removed, the flue gas is fully reheated, the lifting height and the diffusion radius of the flue gas are improved, the corrosion of the flue gas to a chimney is reduced, and white smoke generated after the flue gas is discharged into the atmosphere is eliminated. Hg2+ in the flue gas can be converted into mercuric sulfide and mercuric sulfate precipitate for recycling. The moisture in the flue gas can be converted into secondary steam, and the secondary steam condensate generated after the flue gas is heated is recycled.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a be used for coal-fired steam power plant boiler flue gas demercuration purifier which characterized in that includes: the system comprises a white removal tower, a mercury-containing liquid storage tank communicated with the white removal tower and used for collecting solution in the white removal tower, an evaporator used for evaporating the solution to form a mixture of concentrated solution and secondary steam, a liquid inlet pump communicated with the mercury-containing liquid storage tank and the evaporator and used for conveying the solution in the mercury-containing liquid storage tank to the evaporator, a separator for carrying out gas-liquid separation on the concentrated solution and the secondary steam formed by the evaporator, a heat exchanger for heating the flue gas generated by the de-whitening tower by utilizing the secondary steam separated by the separator, the liquid at the bottom of the separator is subjected to solid-liquid separation, and the separated liquid flows into a cyclone separator of the mercury-containing liquid storage tank, a liquid outlet pump for delivering the bottom liquid of the separator to the cyclone separator and a heat regenerator for heating the liquid flowing out of the cyclone separator with the liquid flowing into the cyclone separator; the separator is communicated to the de-whitening tower, so that the concentrated solution at the upper layer separated by the separator flows back to the de-whitening tower by gravity; the cyclone separator is communicated to the mercury-containing liquid storage tank; the evaporator is communicated with the liquid inlet pump and the separator.
2. The device for removing mercury and purifying boiler flue gas of a coal-fired thermal power plant according to claim 1,
the device for removing mercury from boiler flue gas of coal-fired thermal power plant further comprises: and the cyclone liquid storage tank is used for collecting the impurities separated by the cyclone separator.
3. The coal-fired thermal power plant boiler flue gas demercuration purification device according to claim 2,
the device for removing mercury from boiler flue gas of coal-fired thermal power plant further comprises: the filter pressing device is used for discharging the sediment deposited in the rotational flow liquid storage tank; the filter pressing device is communicated to the rotational flow liquid storage tank.
4. The coal-fired thermal power plant boiler flue gas demercuration purification device according to claim 3,
the rotational flow liquid storage tank is communicated to the mercury-containing liquid storage tank, and the clear liquid treated by the filter pressing device flows back to the mercury-containing liquid storage tank.
5. The coal-fired thermal power plant boiler flue gas demercuration purification device according to claim 4,
and the clear liquid treated by the filter pressing device flows through the heat regenerator and then enters the mercury-containing liquid storage tank.
6. The device for removing mercury and purifying boiler flue gas of a coal-fired thermal power plant according to claim 1,
the device for removing mercury from boiler flue gas of coal-fired thermal power plant further comprises: and the stirrer is used for stirring the liquid in the mercury-containing liquid storage tank.
7. The device for removing mercury and purifying boiler flue gas of a coal-fired thermal power plant according to claim 1,
the mercury-containing liquid storage tank is provided with an alkali supplementing port for supplementing alkali into the tank.
8. The device for removing mercury and purifying boiler flue gas of a coal-fired thermal power plant according to claim 1,
the device for removing mercury from boiler flue gas of coal-fired thermal power plant further comprises: and the water condensing device is used for condensing the secondary steam after passing through the heat exchanger.
9. The device for removing mercury and purifying boiler flue gas of a coal-fired thermal power plant according to claim 1,
the heat exchanger is communicated to the top of the de-whitening tower.
10. The coal-fired thermal power plant boiler flue gas demercuration purification device according to claim 2,
the separator is communicated to the bottom of the de-whitening tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920334650.8U CN209809917U (en) | 2019-03-15 | 2019-03-15 | Be used for coal-fired steam power plant boiler flue gas demercuration purifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920334650.8U CN209809917U (en) | 2019-03-15 | 2019-03-15 | Be used for coal-fired steam power plant boiler flue gas demercuration purifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209809917U true CN209809917U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920334650.8U Expired - Fee Related CN209809917U (en) | 2019-03-15 | 2019-03-15 | Be used for coal-fired steam power plant boiler flue gas demercuration purifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209809917U (en) |
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2019
- 2019-03-15 CN CN201920334650.8U patent/CN209809917U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |