CN219784248U - Flue gas purification system - Google Patents
Flue gas purification system Download PDFInfo
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- CN219784248U CN219784248U CN202321118652.6U CN202321118652U CN219784248U CN 219784248 U CN219784248 U CN 219784248U CN 202321118652 U CN202321118652 U CN 202321118652U CN 219784248 U CN219784248 U CN 219784248U
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- Prior art keywords
- flue gas
- washing
- channel
- pipeline
- acid
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 253
- 239000003546 flue gas Substances 0.000 title claims abstract description 253
- 238000000746 purification Methods 0.000 title claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 137
- 238000005406 washing Methods 0.000 claims abstract description 136
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000001035 drying Methods 0.000 claims abstract description 57
- 239000007789 gas Substances 0.000 claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 55
- 239000000110 cooling liquid Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 76
- 238000000034 method Methods 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 24
- 238000004140 cleaning Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 11
- 239000002826 coolant Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 description 8
- 239000003595 mist Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a flue gas purification system, comprising: the washing and drying tower is provided with a first flue gas channel and a first washing channel, the first flue gas channel is arranged in the washing and drying tower, the first flue gas channel is communicated with the first washing channel, flue gas is arranged in the first flue gas channel, the first washing channel is used for introducing acid liquor, and the acid liquor can wash the flue gas; the gas cooling tower is provided with a second flue gas channel and a second washing channel, the second flue gas channel is arranged in the gas cooling tower, an inlet of the second flue gas channel is communicated with an outlet of the first flue gas channel, the second flue gas channel is communicated with the second washing channel, the second washing channel is used for introducing cooling liquid, and the cooling liquid can wash flue gas so as to reduce the temperature of the flue gas in the second flue gas channel and absorb moisture in the flue gas. By the technical scheme provided by the utility model, the problems of more water consumption and higher energy consumption in the flue gas purification in the prior art can be solved.
Description
Technical Field
The utility model relates to the technical field of flue gas purification, in particular to a flue gas purification system.
Background
At present, the flue gas purification system can purify the flue gas containing impurities into pure flue gas, and the pure flue gas can be used for preparing concentrated sulfuric acid, so that the moisture content in the pure flue gas needs to be strictly controlled. When the flue gas is purified, the circulating liquid is required to be firstly adopted to wash the flue gas, the moisture content in the washed flue gas is increased, the circulating liquid is heated by the flue gas, and when the water in part of the circulating liquid is evaporated and the moisture in the flue gas is removed at the later stage, a large amount of cooling water is required to be adopted to cool the flue gas so as to condense the water vapor in the flue gas, thus the waste of water resources is caused, and the energy consumption is improved.
Disclosure of Invention
The utility model provides a flue gas purification system, which aims to solve the problems of more water consumption and higher energy consumption in flue gas purification in the prior art.
The utility model provides a flue gas purification system, comprising: the washing and drying tower is provided with a first flue gas channel and a first washing channel, the first flue gas channel is arranged in the washing and drying tower, the first flue gas channel extends to the top of the washing and drying tower along the bottom of the washing and drying tower, the first flue gas channel is communicated with the first washing channel, flue gas is arranged in the first flue gas channel, the first washing channel is used for introducing acid liquor, and the acid liquor can wash the flue gas so as to reduce the temperature of the flue gas and absorb moisture in the flue gas; the gas cooling tower is provided with second flue gas passageway and second washing passageway, and second flue gas passageway sets up in the inside of gas cooling tower, and second flue gas passageway extends to the top of gas cooling tower along the bottom of gas cooling tower, and second flue gas passageway's import communicates with first flue gas passageway's export, and second flue gas passageway communicates with second washing passageway each other, and second washing passageway is used for letting in the coolant liquid, and the coolant liquid can wash the flue gas to reduce the temperature of the flue gas in the second flue gas passageway and absorb the moisture in the flue gas.
Further, the washing and drying tower is provided with a first discharge port, the first discharge port is arranged at the bottom of the washing and drying tower and used for discharging acid liquor, a first spray pipeline is arranged in the washing and drying tower and is arranged at the top of the washing and drying tower, the first washing channel is provided with a first acid liquor inlet and a first acid liquor outlet which are oppositely arranged, the first acid liquor outlet is communicated with the first spray pipeline, and the first acid liquor inlet is communicated with the first discharge port.
Further, a first heat exchanger is arranged on the first washing channel, the first heat exchanger is provided with a first pipeline and a second pipeline, the first pipeline is communicated with the first washing channel, and the first heat exchanger exchanges heat with the first pipeline through the second pipeline.
Further, the flue gas cleaning system further includes: the second-stage scrubber is internally provided with a third flue gas channel and a third washing channel, the third flue gas channel is arranged in the second-stage scrubber, the third flue gas channel extends to the top of the second-stage scrubber along the bottom of the second-stage scrubber, the inlet of the third flue gas channel is communicated with the outlet of the second flue gas channel, the third flue gas channel is communicated with the third washing channel, and the third washing channel is used for introducing process water to wash flue gas in the third flue gas channel; the electric demister is provided with an air inlet and an air outlet, the air inlet is arranged at the bottom of the electric demister, the air outlet is arranged at the top of the electric demister, the air inlet is communicated with the outlet of the third flue gas channel, and the air outlet can discharge flue gas so as to remove impurities in the flue gas.
Further, the flue gas purification system further comprises an acid supply part for replenishing acid liquid into the first washing channel, a first circulating pump and a regulator are further arranged on the first washing channel, the first circulating pump can drive the acid liquid from the first acid liquid inlet to the first acid liquid outlet, the regulator is arranged at the downstream of the first heat exchanger and is communicated with the acid supply part, and the contact area between the replenished acid liquid and the acid liquid in the first washing channel can be regulated by the regulator.
Further, the first washing channel comprises a first circulating pipeline and a first heat exchange pipeline, the first heat exchanger, the first circulating pump and the regulator are arranged on the first circulating pipeline, the first heat exchange pipeline is communicated with the first circulating pipeline, an inlet of the first heat exchange pipeline is arranged between the first circulating pump and the first heat exchanger, an outlet of the first heat exchange pipeline is arranged between the first heat exchanger and the regulator, and a first regulating valve is arranged on the first heat exchange pipeline.
Further, the gas cooling tower is provided with a second discharge port, the second discharge port is arranged at the bottom of the gas cooling tower and is used for discharging cooling liquid, a second spray pipeline is arranged in the gas cooling tower and is arranged at the top of the gas cooling tower, the second washing channel is provided with a second acid liquid inlet and a second acid liquid outlet which are oppositely arranged, the second acid liquid outlet is communicated with the second spray pipeline, and the second acid liquid inlet is communicated with the second discharge port; the second-stage scrubber is provided with a third discharge port, the third discharge port is arranged at the bottom of the second-stage scrubber and is used for discharging process water, a third spray pipeline is arranged in the second-stage scrubber and is arranged at the top of the second-stage scrubber, the third washing channel is provided with a third acid liquor inlet and a third acid liquor outlet which are oppositely arranged, the third acid liquor outlet is communicated with the third spray pipeline, and the third acid liquor inlet is communicated with the third discharge port.
Further, the second washing channel comprises a second circulating pipeline and a second heat exchange pipeline, the second circulating pipeline is provided with a second circulating pump and a second heat exchanger, the second heat exchange pipeline is communicated with the second circulating pipeline, an inlet of the second heat exchange pipeline is arranged between the second circulating pump and the second heat exchanger, an outlet of the second heat exchange pipeline is arranged between the second heat exchanger and a second acid liquor outlet, and a second regulating valve is arranged on the second heat exchange pipeline; the third washing channel is provided with a third circulating pump so as to drive the process water from a third acid liquid inlet to a third acid liquid outlet.
Further, the flue gas purification system further comprises a fourth heat exchange pipeline, a third heat exchanger is arranged on the fourth heat exchange pipeline, the third heat exchanger comprises a third pipeline and a fourth pipeline, the second pipeline and the third pipeline are communicated with the fourth heat exchange pipeline, the fourth pipeline is communicated with the domestic water system, and the third heat exchanger exchanges heat with the third pipeline through the fourth pipeline.
Further, the fourth heat exchange pipeline is further provided with a fourth circulating pump and an expansion tank, and the fourth circulating pump can drive liquid in the fourth heat exchange pipeline to circularly flow in the fourth heat exchange pipeline.
By adopting the technical scheme of the utility model, the flue gas firstly enters the washing and drying tower through the inlet of the first flue gas channel, is washed by the acid liquor in the first washing channel, is discharged into the gas cooling tower through the outlet of the first flue gas channel and the inlet of the second flue gas channel, and is washed by the cooling liquid in the second washing channel. When the acid liquor washes the flue gas, the acid liquor can cool the flue gas, and the moisture in the flue gas can be condensed into the acid liquor, so that the moisture content in the flue gas can be reduced, the acid liquor can absorb acid mist in the flue gas, partial impurities are removed, and the flue gas can be washed better; and when the flue gas is introduced into the gas cooling tower for washing again, the consumption of cooling liquid can be reduced, and the waste of water resources is avoided, so that the energy consumption is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic structural diagram of a flue gas cleaning system according to an embodiment of the present utility model.
Wherein the above figures include the following reference numerals:
10. washing and drying the tower; 11. a first flue gas channel; 121. a first circulation line; 1211. a first acid inlet; 1212. a first acid outlet; 1213. a first heat exchanger; 1214. a first circulation pump; 1215. a regulator; 122. a first heat exchange line; 1221. a first regulating valve;
20. a gas cooling tower; 21. a second flue gas channel; 22. a second washing passage; 221. a second circulation line; 2211. a second acid inlet; 2212. a second acid outlet; 2213. a second circulation pump; 2214. a second heat exchanger; 222. a second heat exchange line; 2221. a second regulating valve;
30. a secondary scrubber; 31. a third flue gas channel; 32. a third washing passage; 321. a third acid inlet; 322. a third acid outlet; 323. a third circulation pump;
40. an electric defogger; 41. an air inlet; 42. an exhaust port;
50. an acid supply part;
60. a fourth heat exchange pipeline; 61. a third heat exchanger; 62. a fourth circulation pump; 63. an expansion tank;
71. a first liquid discharge portion; 72. a second liquid discharge portion; 73. a smoke supply part; 74. a water supply part; 75. a flue gas collection unit;
80. and a water seal structure.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present utility model provides a flue gas cleaning system including a scrubber drying tower 10 and a gas cooling tower 20. The washing and drying tower 10 is provided with a first flue gas channel 11 and a first washing channel, the first flue gas channel 11 is arranged in the washing and drying tower 10, the first flue gas channel 11 extends to the top of the washing and drying tower 10 along the bottom of the washing and drying tower 10, the first flue gas channel 11 is provided with an inlet and an outlet which are oppositely arranged, the inlet of the first flue gas channel 11 is arranged at the bottom of the washing and drying tower 10, and the outlet of the first flue gas channel 11 is arranged at the top of the washing and drying tower 10. The first flue gas channel 11 is communicated with the first washing channel, flue gas is arranged in the first flue gas channel 11, the first washing channel is used for introducing acid liquor, and the acid liquor can wash the flue gas so as to reduce the temperature of the flue gas and absorb moisture in the flue gas. The gas cooling tower 20 is provided with a second flue gas channel 21 and a second washing channel 22, the second flue gas channel 21 is arranged in the gas cooling tower 20, the second flue gas channel 21 extends to the top of the gas cooling tower 20 along the bottom of the gas cooling tower 20, the second flue gas channel 21 is provided with an inlet and an outlet which are oppositely arranged, the inlet of the second flue gas channel 21 is arranged at the bottom of the gas cooling tower 20, the outlet of the second flue gas channel 21 is arranged at the top of the gas cooling tower 20, and the inlet of the second flue gas channel 21 is communicated with the outlet of the first flue gas channel 11. The second flue gas channel 21 is communicated with the second washing channel 22, and the second washing channel 22 is used for introducing cooling liquid, and the cooling liquid can wash the flue gas so as to reduce the temperature of the flue gas in the second flue gas channel 21 and absorb the moisture in the flue gas.
By adopting the technical scheme of the utility model, the flue gas firstly enters the washing and drying tower 10 through the inlet of the first flue gas channel 11, is washed by the acid liquor in the first washing channel, is discharged into the gas cooling tower 20 through the outlet of the first flue gas channel 11 and the inlet of the second flue gas channel 21, and is washed by the cooling liquid in the second washing channel 22. When the acid liquor washes the flue gas, the acid liquor can cool the flue gas, and the moisture in the flue gas can be condensed into the acid liquor, so that the moisture content in the flue gas can be reduced, the acid liquor can absorb acid mist in the flue gas, partial impurities are removed, and the flue gas can be washed better; and when the flue gas is introduced into the gas cooling tower 20 for washing again, the consumption of cooling liquid can be reduced, and the waste of water resources is avoided, so that the energy consumption is avoided.
In the utility model, the concentration of the acid liquor entering the washing and drying tower 10 for circulation is controlled between 50% and 70%, and the saturated vapor pressure of the acid liquor is smaller, so that the water in the flue gas can be absorbed conveniently. For example, in the present utility model, the water content of the flue gas entering the scrub-drying column 10 is about 18%, the water content of the flue gas discharged from the scrub-drying column 10 and entering the gas cooling column 20 is controlled to be between 12% and 15%, and the water content of the flue gas discharged from the gas cooling column 20 is controlled to be 7%. Alternatively, dilute sulfuric acid may be used as the acid solution.
Wherein in the utility model, the temperature of the flue gas entering the washing and drying tower 10 is controlled between 250 ℃ and 350 ℃, the temperature of the acid liquor circulating in the washing and drying tower 10 is controlled between 60 ℃ and 80 ℃, the temperature of the acid liquor exiting the washing and drying tower 10 is controlled between 90 ℃ and 120 ℃, the temperature of the flue gas exiting the washing and drying tower 10 is controlled between 60 ℃ and 80 ℃, and the liquid-gas ratio of the acid liquor and the flue gas is controlled at 1.0L/m 3 ～5.0L/m 3 In addition, the heat carried by the flue gas is mostly discharged through the acid liquor in the washing and drying tower 10, and the heat required to be discharged by the cooling liquid in the gas cooling tower 20 is less, so that the consumption of the cooling water can be further reduced, and the energy consumption is reduced.
Specifically, the washing and drying tower 10 has a first discharge port provided at the bottom of the washing and drying tower 10 for discharging acid solution, the washing and drying tower 10 having a first spray line therein, the first spray line being provided at the top of the washing and drying tower 10, the first washing passage having a first acid solution inlet 1211 and a first acid solution outlet 1212 provided opposite to each other, the first acid solution outlet 1212 being in communication with the first spray line, the first acid solution inlet 1211 being in communication with the first discharge port. The flue gas flows to the top of washing drying tower 10 from the bottom of washing drying tower 10, and the acidizing fluid in the washing drying tower 10 falls to the bottom of washing drying tower 10 from the top, so set up, can guarantee that acidizing fluid and flue gas fully contact to can guarantee the washing and the cooling effect of acidizing fluid to the flue gas. In the utility model, the first discharge port is arranged below the inlet of the first flue gas channel 11, and the first spray pipeline is arranged below the outlet of the first flue gas channel 11, so that the acid liquor and the flue gas can be further ensured to be fully contacted.
Wherein the washing and drying tower 10 is communicated with the smoke supply part, and untreated smoke enters the washing and drying tower 10. The flue gas in the scrubber-drier 10 has large smoke content and complex components, the operation environment is the worst in the flue gas purifying system, and the components of the discharged waste acid are relatively complex. In order to ensure that the washing and drying tower 10 can stably operate for a long time, materials such as simple structure, corrosion resistance, wear resistance, difficult scaling and the like are adopted. The tower structure can adopt an empty tower, a reverse spray washing tower and the like.
Specifically, the first washing passage is provided with a first heat exchanger 1213, the first heat exchanger 1213 has a first pipe and a second pipe, the first pipe communicates with the first washing passage, and the first heat exchanger 1213 exchanges heat with the first pipe through the second pipe. By such arrangement, the temperature of the acid liquid discharged from the washing and drying tower 10 can be conveniently reduced, and the acid liquid can be conveniently reused, so that the consumption of the acid liquid can be reduced, and the energy consumption can be further reduced.
In the present utility model, since the acid liquid discharged from the washing and drying tower 10 has a large amount of impurities, complex components, and corrosive cavities, and is easily scaled when the temperature is lowered, the diameter of the first pipe is larger than that of the second pipe, thereby avoiding the blockage in the first pipe and further ensuring the normal operation of the first heat exchanger 1213. The material of the first heat exchanger 1213 may be an alloy material with corrosion resistance and wear resistance, fluorine-resistant glass, or the like, and the first heat exchanger 1213 may be a plate structure, a tube array structure, or the like.
Further, the flue gas cleaning system further comprises a secondary scrubber 30 and an electric mist eliminator 40. The secondary scrubber 30 is internally provided with a third flue gas channel 31 and a third scrubbing channel 32, the third flue gas channel 31 is arranged in the secondary scrubber 30, the third flue gas channel 31 extends to the top of the secondary scrubber 30 along the bottom of the secondary scrubber 30, the third flue gas channel 31 is provided with an inlet and an outlet which are oppositely arranged, the inlet of the third flue gas channel 31 is arranged at the bottom of the secondary scrubber 30, and the outlet of the third flue gas channel 31 is arranged at the top of the secondary scrubber 30. The inlet of the third flue gas channel 31 is communicated with the outlet of the second flue gas channel 21, the third flue gas channel 31 is communicated with the third washing channel 32, and the third washing channel 32 is used for introducing process water to wash the flue gas in the third flue gas channel 31. The flue gas is discharged into the secondary scrubber 30 through the outlet of the second flue gas channel 21 and the inlet of the third flue gas channel 31, and the process water can further scrub the flue gas to further remove dust or acid mist in the flue gas.
The temperature of the process water is the same as the temperature of the flue gas in the third flue gas channel 31, so the process water does not increase the moisture content in the flue gas, and the moisture content of the flue gas discharged from the secondary scrubber 30 is 7%.
Specifically, the electric demister 40 has an air inlet 41 and an air outlet 42, the air inlet 41 is provided at the bottom of the electric demister 40, the air outlet 42 is provided at the top of the electric demister 40, the air inlet 41 communicates with the outlet of the third flue gas channel 31, and the air outlet 42 can discharge flue gas to remove impurities in the flue gas. By the arrangement, dust and acid mist in the flue gas can be further removed, the cleanliness of the flue gas is improved, and the flue gas exhausted from the exhaust port 42 is clean flue gas and can be used for subsequent production of concentrated sulfuric acid.
Further, the flue gas purification system further comprises a flue gas collection portion 75, and the exhaust port 42 is communicated with the flue gas collection portion 75 and used for collecting clean flue gas so as to facilitate follow-up work.
Wherein, the flue gas purification system still includes water seal structure 80, water seal structure 80 and gas vent 42 intercommunication, when the flue gas purification system normal operating, in water seal structure 80 can avoid external gas to get into the flue gas purification system, when the flue gas purification system work appears the mistake, very easily produces negative pressure state in the flue gas purification system, and the flue gas purification system can inhale the flue gas purification system with water in the water seal structure 80, and then in external air can get into the flue gas purification system, avoids the flue gas purification system to produce the damage.
Further, the flue gas purification system further includes an acid supply portion 50 for replenishing acid solution into the first washing channel, the first washing channel is further provided with a first circulation pump 1214 and a regulator 1215, the first circulation pump 1214 can drive the acid solution from the first acid solution inlet 1211 to the first acid solution outlet 1212, the regulator 1215 is disposed at the downstream of the first heat exchanger 1213, the regulator 1215 is communicated with the acid supply portion 50, and the regulator 1215 can regulate the contact area between the replenished acid solution and the acid solution in the first washing channel. When the moisture in the flue gas is condensed into the acid liquor, the concentration of the acid liquor is reduced, and the acid liquor with higher concentration needs to be supplemented into the first washing channel to ensure the concentration of the acid liquor. In the present utility model, the acid in the acid supply portion 50 is concentrated sulfuric acid. However, the higher concentration of acid solution releases a large amount of heat when it contacts water, and regulator 1215 can reduce the amount of heat released.
In the present utility model, the regulator 1215 has a plurality of nozzles therein, which can increase the contact area between the acid liquid in the first washing passage and the acid liquid in the replenishment, and reduce the generation of heat. In the present utility model, the temperature of the acid solution before and after mixing can be controlled within the range of 1 ℃ to 5 ℃ by the regulator 1215, and the material of the concentration regulator 1215 is a material which is resistant to severe temperature change, corrosion and abrasion.
Further, the flue gas purification system further comprises a first liquid draining part 71, the first washing channel is communicated with the first liquid draining part 71, when moisture in flue gas is condensed into acid liquor, the content of the acid liquor is increased, and redundant acid liquor in the washing and drying tower 10 can be drained into the first liquid draining part 71 through the first washing channel.
Specifically, the first washing passage includes a first circulation line 121 and a first heat exchange line 122, a first heat exchanger 1213, a first circulation pump 1214 and a regulator 1215 are disposed on the first circulation line 121, the first heat exchange line 122 communicates with the first circulation line 121, an inlet of the first heat exchange line 122 is disposed between the first circulation pump 1214 and the first heat exchanger 1213, an outlet of the first heat exchange line 122 is disposed between the first heat exchanger 1213 and the regulator 1215, and a first regulating valve 1221 is disposed on the first heat exchange line 122. So set up, can control the temperature of acidizing fluid in the first washing passageway through adjusting the aperture of first governing valve 1221, be convenient for control the temperature of acidizing fluid.
Further, the gas cooling tower 20 has a second discharge port, the second discharge port is disposed at the bottom of the gas cooling tower 20, the second discharge port is used for discharging the cooling liquid, a second spray pipeline is disposed in the gas cooling tower 20, the second spray pipeline is disposed at the top of the gas cooling tower 20, the second washing channel 22 has a second acid liquid inlet 2211 and a second acid liquid outlet 2212 which are disposed oppositely, the second acid liquid outlet 2212 is communicated with the second spray pipeline, and the second acid liquid inlet 2211 is communicated with the second discharge port. The flue gas flows to the top of gas cooling tower 20 by the bottom of gas cooling tower 20, and the coolant liquid in the gas cooling tower 20 falls to the bottom of gas cooling tower 20 from the top, so set up, can guarantee that coolant liquid and flue gas fully contact to can guarantee the washing and the cooling effect of coolant liquid to the flue gas. In the utility model, the second discharge port is arranged below the inlet of the second flue gas channel 21, and the second spray pipeline is arranged below the outlet of the second flue gas channel 21, so that the cooling liquid and the flue gas can be further ensured to be fully contacted.
Specifically, the flue gas cleaning system further includes a second liquid drain portion 72, the second washing channel 22 is in communication with the second liquid drain portion 72, and when moisture in the flue gas condenses into a cooling liquid, the content of the cooling liquid increases, and the excess cooling liquid in the gas cooling tower 20 can be drained into the second liquid drain portion 72 through the second washing channel 22.
The second-stage scrubber 30 is provided with a third discharge port, the third discharge port is arranged at the bottom of the second-stage scrubber 30, the third discharge port is used for discharging process water, a third spray pipeline is arranged in the second-stage scrubber 30, the third spray pipeline is arranged at the top of the second-stage scrubber 30, the third washing channel 32 is provided with a third acid liquid inlet 321 and a third acid liquid outlet 322 which are oppositely arranged, the third acid liquid outlet 322 is communicated with the third spray pipeline, and the third acid liquid inlet 321 is communicated with the third discharge port. The flue gas flows to the top of secondary scrubber 30 from the bottom of secondary scrubber 30, and the process water in the secondary scrubber 30 falls to the bottom of secondary scrubber 30 from the top, so set up, can guarantee that process water and flue gas fully contact to can guarantee the washing and the cooling effect of process water to the flue gas. In the utility model, the third discharge port is arranged below the inlet of the third flue gas channel 31, and the third spray pipeline is arranged below the outlet of the third flue gas channel 31, so that the process water and the flue gas can be further ensured to be fully contacted.
The flue gas purification system further comprises a water supply part 74, the water supply part 74 is communicated with the bottom of the secondary scrubber 30, the water supply part 74 can supplement process water for the secondary scrubber 30, a communication pipeline is arranged between the secondary scrubber 30 and the gas cooling tower 20, the communication pipeline can supplement redundant process water in the secondary scrubber 30 into the gas cooling tower 20, and the process water is still clean after the flue gas is washed by the process water, and waste of the process water can be caused by direct discharge, so that the process water in the secondary scrubber 30 is supplemented into the gas cooling tower 20.
Specifically, the second washing channel 22 includes a second circulation pipe 221 and a second heat exchange pipe 222, the second circulation pipe 221 is provided with a second circulation pump 2213 and a second heat exchanger 2214, the second heat exchange pipe 222 is communicated with the second circulation pipe 221, an inlet of the second heat exchange pipe 222 is disposed between the second circulation pump 2213 and the second heat exchanger 2214, an outlet of the second heat exchange pipe 222 is disposed between the second heat exchanger 2214 and a second acid liquid outlet 2212, and the second heat exchange pipe 222 is provided with a second regulating valve 2221. A third circulation pump 323 is provided on the third washing passage 32 to drive the process water from the third acid inlet 321 to the third acid outlet 322. Thus, the temperature of the coolant in the second washing passage 22 can be controlled by adjusting the opening degree of the second adjusting valve 2221, so that the temperature of the coolant can be controlled. The second circulation pump 2213 facilitates driving the coolant to flow in the second washing passage 22, and the third circulation pump 323 facilitates driving the process water to flow in the third washing passage 32.
Further, the flue gas purification system further comprises a fourth heat exchange pipeline 60, the fourth heat exchange pipeline 60 is a closed cycle pipeline, a third heat exchanger 61 is arranged on the fourth heat exchange pipeline 60, the third heat exchanger 61 comprises a third pipeline and a fourth pipeline, the second pipeline and the third pipeline are communicated with the fourth heat exchange pipeline 60, the fourth pipeline is used for being communicated with a domestic water system, and the third heat exchanger 61 exchanges heat with the third pipeline through the fourth pipeline. The heat in the acid liquor can be recovered through the arrangement, the heat can be utilized, and the heat loss is reduced.
Moreover, the liquid in the fourth heat exchange pipeline 60 is softened water, the liquid in the domestic water system is ordinary domestic water, if the domestic water system is directly communicated with the second pipeline, the second pipeline and the domestic water system are extremely easy to scale, so that the pipelines in the first heat exchanger 1213 and the domestic water system are extremely easy to be blocked, and the normal operation of heat exchange work is influenced.
Meanwhile, if the domestic water system is directly communicated with the second pipeline, when the first heat exchanger 1213 leaks, the whole domestic water system is damaged, but with the above structure, only the fourth heat exchange pipeline 60 is damaged, so that the maintenance is convenient, and the damage range is reduced.
Wherein, in the utility model, the heat recovery rate of the flue gas purification system is about 60-80%.
Specifically, the fourth heat exchange pipeline 60 is further provided with a fourth circulating pump 62 and an expansion tank 63, and the fourth circulating pump 62 can drive the liquid in the fourth heat exchange pipeline 60 to circulate in the fourth heat exchange pipeline 60. So set up, the liquid flow in the fourth heat transfer pipeline 60 of being convenient for, the liquid in the fourth heat transfer pipeline 60 receives expend with heat and contract with cold's hardness, and the volume of liquid can change, and expansion tank 63 can hold the liquid of abundance, avoids fourth heat transfer pipeline 60 to produce the fracture.
Further, a temperature detector, a pressure detection alarm device, a pH detection alarm device, etc. are provided on the fourth heat exchange pipeline 60, so that the working state of the fourth heat exchange pipeline 60 can be detected.
Wherein, the bottom of the washing and drying tower 10, the bottom of the gas cooling tower 20 and the bottom of the gas cooling tower 20 are all provided with liquid level detectors for detecting the liquid levels of the washing and drying tower 10, the gas cooling tower 20 and the gas cooling tower 20; a temperature detector is arranged on a communicating pipeline between the outlet of the first flue gas channel 11 and the inlet of the second flue gas channel 21, and is used for detecting the temperature of flue gas discharged from the washing and drying tower 10; the first washing channel and the second washing channel 22 are provided with temperature detectors for detecting the temperature of the acid liquid and the cooling liquid; a concentration detector is arranged on the first washing channel to detect the concentration of the acid liquor; a flow rate detector is provided on a communication line between the water supply part 74 and the secondary scrubber 30 to detect the flow rate of the process water entering the secondary scrubber 30.
In order to better understand the technical scheme of the utility model, the flue gas purifying system in the prior art is compared with the flue gas purifying system of the utility model, wherein the flue gas amount of the flue gas inlet purifying system is 156300Nm 3 And/h, moisture content 18.5%, temperature 280 ℃ and water content:
from the above table, it can be obtained that the flow rate of the liquid flowing through the second circulation pump 2213 is smaller than the flow rate of the liquid flowing through the gas cooling tower 20, so that the flue gas purifying system of the present utility model can reduce the usage amount of the cooling liquid, avoid the waste of water resources, and avoid the energy consumption.
In addition, in the flue gas purification system of the present utility model, the concentration of the acid solution entering the washing and drying tower 10 is 50%, the temperature is 70 ℃, and the liquid-gas ratio is 3L/m 3 The temperature of the acid liquid discharged from the washing and drying tower 10 was theoretically calculated to be 109 ℃. The recoverable heat in the flue gas purification system is 71.6%.
In the present utility model, the spent acid discharge comprises two parts: a part is discharged from the washing and drying tower 10, about 10m 3 And/h, the concentration is about 50%, the components are complex and dirty; another part is discharged from the gas cooling tower 20, about 8m 3 And (3) the acid concentration is lower, the impurity components are mainly halogen elements, and the acid concentration is clearer. In the prior art, the discharge amount of waste acid is about 34m 3 And/h, the acid concentration is lower, about 8%, the components are complex, and the product is dirty. The flue gas purification system can reduce wasteThe discharge amount of the acid can realize the dirt removal and diversion, and the waste acid can be recovered and treated conveniently.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A flue gas cleaning system, characterized in that the flue gas cleaning system comprises:
the washing and drying tower (10), be provided with first flue gas passageway (11) and first washing passageway on the washing and drying tower (10), first flue gas passageway (11) set up the inside of washing and drying tower (10), just first flue gas passageway (11) follow the bottom of washing and drying tower (10) extends to the top of washing and drying tower (10), first flue gas passageway (11) with first washing passageway intercommunication, have the flue gas in first flue gas passageway (11), first washing passageway is used for letting in acidizing fluid, the acidizing fluid can wash the flue gas in order to reduce the temperature of flue gas and absorb the moisture in the flue gas;
the gas cooling tower (20), be provided with second flue gas passageway (21) and second washing passageway (22) on gas cooling tower (20), second flue gas passageway (21) set up the inside of gas cooling tower (20), just second flue gas passageway (21) are followed the bottom of gas cooling tower (20) extends to the top of gas cooling tower (20), the import of second flue gas passageway (21) with the export intercommunication of first flue gas passageway (11), second flue gas passageway (21) with second washing passageway (22) are intercommunication each other, second washing passageway (22) are used for letting in the coolant liquid, the coolant liquid can be right the flue gas wash, in order to reduce the temperature of flue gas in second flue gas passageway (21) and absorb moisture in the flue gas.
2. The flue gas cleaning system according to claim 1, wherein the wash drying tower (10) has a first discharge port, the first discharge port is arranged at the bottom of the wash drying tower (10), the first discharge port is used for discharging acid liquor, a first spray pipeline is arranged in the wash drying tower (10), the first spray pipeline is arranged at the top of the wash drying tower (10), the first wash channel has a first acid liquor inlet (1211) and a first acid liquor outlet (1212) which are oppositely arranged, the first acid liquor outlet (1212) is communicated with the first spray pipeline, and the first acid liquor inlet (1211) is communicated with the first discharge port.
3. The flue gas cleaning system according to claim 2, wherein a first heat exchanger (1213) is provided on the first wash channel, the first heat exchanger (1213) having a first pipe and a second pipe, the first pipe being in communication with the first wash channel, the first heat exchanger (1213) exchanging heat with the first pipe through the second pipe.
4. The flue gas cleaning system according to claim 2, further comprising:
a second-stage scrubber (30), wherein a third flue gas channel (31) and a third washing channel (32) are arranged in the second-stage scrubber (30), the third flue gas channel (31) is arranged in the second-stage scrubber (30), the third flue gas channel (31) extends to the top of the second-stage scrubber (30) along the bottom of the second-stage scrubber (30), the inlet of the third flue gas channel (31) is communicated with the outlet of the second flue gas channel (21), the third flue gas channel (31) is communicated with the third washing channel (32), and the third washing channel (32) is used for introducing process water to wash the flue gas in the third flue gas channel (31);
the electric demister (40) is provided with an air inlet (41) and an air outlet (42), the air inlet (41) is arranged at the bottom of the electric demister (40), the air outlet (42) is arranged at the top of the electric demister (40), the air inlet (41) is communicated with the outlet of the third flue gas channel (31), and the air outlet (42) can exhaust the flue gas so as to remove impurities in the flue gas.
5. A flue gas cleaning system according to claim 3, further comprising an acid supply (50) to replenish acid liquid into the first washing channel, a first circulation pump (1214) and a regulator (1215) being further provided on the first washing channel, the first circulation pump (1214) being capable of driving the acid liquid from the first acid liquid inlet (1211) to the first acid liquid outlet (1212), the regulator (1215) being provided downstream of the first heat exchanger (1213), the regulator (1215) being in communication with the acid supply (50), the regulator (1215) being capable of regulating the contact area of the replenished acid liquid with the acid liquid in the first washing channel.
6. The flue gas cleaning system according to claim 5, wherein the first wash channel comprises a first circulation line (121) and a first heat exchange line (122), the first heat exchanger (1213), the first circulation pump (1214) and the regulator (1215) are arranged on the first circulation line (121), the first heat exchange line (122) is in communication with the first circulation line (121), an inlet of the first heat exchange line (122) is arranged between the first circulation pump (1214) and the first heat exchanger (1213), an outlet of the first heat exchange line (122) is arranged between the first heat exchanger (1213) and the regulator (1215), and a first regulating valve (1221) is arranged on the first heat exchange line (122).
7. The flue gas cleaning system according to claim 4, wherein,
the gas cooling tower (20) is provided with a second discharge port, the second discharge port is arranged at the bottom of the gas cooling tower (20), the second discharge port is used for discharging cooling liquid, a second spray pipeline is arranged in the gas cooling tower (20), the second spray pipeline is arranged at the top of the gas cooling tower (20), the second washing channel (22) is provided with a second acid liquid inlet (2211) and a second acid liquid outlet (2212) which are oppositely arranged, the second acid liquid outlet (2212) is communicated with the second spray pipeline, and the second acid liquid inlet (2211) is communicated with the second discharge port;
the secondary scrubber (30) is provided with a third discharge port, the third discharge port is arranged at the bottom of the secondary scrubber (30), the third discharge port is used for discharging process water, a third spraying pipeline is arranged in the secondary scrubber (30), the third spraying pipeline is arranged at the top of the secondary scrubber (30), the third washing channel (32) is provided with a third acid liquid inlet (321) and a third acid liquid outlet (322) which are oppositely arranged, the third acid liquid outlet (322) is communicated with the third spraying pipeline, and the third acid liquid inlet (321) is communicated with the third discharge port.
8. The flue gas cleaning system according to claim 7, wherein,
the second washing channel (22) comprises a second circulation pipeline (221) and a second heat exchange pipeline (222), a second circulation pump (2213) and a second heat exchanger (2214) are arranged on the second circulation pipeline (221), the second heat exchange pipeline (222) is communicated with the second circulation pipeline (221), an inlet of the second heat exchange pipeline (222) is arranged between the second circulation pump (2213) and the second heat exchanger (2214), an outlet of the second heat exchange pipeline (222) is arranged between the second heat exchanger (2214) and the second acid liquor outlet (2212), and a second regulating valve (2221) is arranged on the second heat exchange pipeline (222);
a third circulating pump (323) is arranged on the third washing channel (32) so as to drive the process water from the third acid liquid inlet (321) to the third acid liquid outlet (322).
9. The flue gas cleaning system according to claim 5, further comprising a fourth heat exchange line (60), a third heat exchanger (61) being provided on the fourth heat exchange line (60), the third heat exchanger (61) comprising a third line and a fourth line, the second line and the third line being in communication with the fourth heat exchange line (60), the fourth line being for communication with a domestic water system, the third heat exchanger (61) exchanging heat with the third line through the fourth line.
10. The flue gas purification system according to claim 9, wherein a fourth circulation pump (62) and an expansion tank (63) are further arranged on the fourth heat exchange pipeline (60), and the fourth circulation pump (62) can drive the liquid in the fourth heat exchange pipeline (60) to circulate in the fourth heat exchange pipeline (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321118652.6U CN219784248U (en) | 2023-05-10 | 2023-05-10 | Flue gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321118652.6U CN219784248U (en) | 2023-05-10 | 2023-05-10 | Flue gas purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219784248U true CN219784248U (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321118652.6U Active CN219784248U (en) | 2023-05-10 | 2023-05-10 | Flue gas purification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219784248U (en) |
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2023
- 2023-05-10 CN CN202321118652.6U patent/CN219784248U/en active Active
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