CN113842751A - Device and method for treating waste gas containing carbon disulfide - Google Patents
Device and method for treating waste gas containing carbon disulfide Download PDFInfo
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- CN113842751A CN113842751A CN202111159446.5A CN202111159446A CN113842751A CN 113842751 A CN113842751 A CN 113842751A CN 202111159446 A CN202111159446 A CN 202111159446A CN 113842751 A CN113842751 A CN 113842751A
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- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 title claims abstract description 612
- 239000002912 waste gas Substances 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 159
- 238000000746 purification Methods 0.000 claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 33
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002351 wastewater Substances 0.000 claims description 86
- 230000008929 regeneration Effects 0.000 claims description 57
- 238000011069 regeneration method Methods 0.000 claims description 57
- 239000002250 absorbent Substances 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 12
- 230000014759 maintenance of location Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 238000012856 packing Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
Abstract
The invention relates to the technical field of waste gas treatment, in particular to a device and a method for treating waste gas containing carbon disulfide. In order to continuously and circularly purify the carbon disulfide in the waste gas containing the carbon disulfide and simultaneously recycle the carbon disulfide in the waste gas, the method increases the retention time of the waste gas containing the carbon disulfide by the countercurrent of water, obtains different gas-liquid balance data of the carbon disulfide and the water under different concentrations by using actual experimental measurement, removes most of the carbon disulfide in the waste gas by the principle of gas phase replacement, and the produced mixed liquid containing liquid carbon disulfide and water is output to a first separator, the carbon disulfide and the water are separated by the first separator, then one part of the water is conveyed back to a purification tower to purify the carbon disulfide-containing waste gas in the tower, the other part of the water passes through a second separator to reduce the content of carbon disulfide in the water, and then flows back to the carbon disulfide purification tower, the concentration of carbon disulfide in the outlet gas phase is ensured to be low enough, and then the cyclic utilization of water is realized.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a device and a method for treating waste gas containing carbon disulfide.
Background
Carbon disulfide is an important basic chemical raw material, is widely used in the fields of chemical fibers, rubber, pesticides, medicines and the like, has a low boiling point, is very volatile under normal pressure, and is very easy to explode after the ignition point is low and the volatilization is carried out.
Because carbon disulfide explosion range is narrow and volatility is better, in chemical fiber industry, rubber accelerator, xanthate, organic intermediate industry and the like which use carbon disulfide as raw materials, and carbon disulfide manufacturing enterprises and various places for storing or using carbon disulfide, in order to ensure that gas contacting with carbon disulfide does not contain oxygen, a large amount of nitrogen is required to be used for sealing carbon disulfide or serving as a carrier, the inevitable generation of waste gas emission containing carbon disulfide is generated, and if the carbon disulfide contained in waste gas is directly emitted without treatment, not only the environment is seriously polluted, the health is harmed, but also equipment is easy to corrode, and serious potential safety hazards are caused.
At present, the industry processes carbon disulfide waste gas by using chilled water to indirectly cool the waste gas and burning the waste gas to remove sulfur. According to the method, a large amount of chilled water is used for cooling the gas containing carbon disulfide to be near 0 ℃ (equipment is blocked due to the fact that water in the gas is frozen when the temperature is lower than 0 ℃), and the carbon disulfide contained in the cooled waste gas still far exceeds the emission standard, so that the carbon disulfide in the waste gas is burned into sulfur dioxide by using the waste gas burning technology and fuels such as natural gas and diesel oil, and then the waste gas is treated to reach the standard by using a traditional desulfurization mode. Therefore, the method has the advantages of high cost, long treatment process and high investment, and a large amount of recyclable carbon disulfide is incinerated to form pollutants. Meanwhile, a large amount of natural gas is consumed as fuel, and byproducts such as worthless industrial sodium sulfate and the like are basically produced. In addition, other treatment modes such as catalytic oxidation, biochemistry and the like in the industry are based on a mode of destroying carbon disulfide in waste gas instead of resource recycling, and compared with the mode, the method has the advantages of more complex flow and higher consumption.
Disclosure of Invention
For solving prior art's shortcoming and not enough, provide a device and method that contain carbon disulfide waste gas, can last the endless with the carbon disulfide in the waste gas that contains carbon disulfide purify to realize tail gas discharge to reach standard, can no longer consume fuels such as natural gas, diesel oil with the carbon disulfide recycle in the waste gas simultaneously, also can not use industrial raw materials such as liquid alkali, lime as the absorbent, reduced the exhaust-gas treatment cost by a wide margin.
In order to achieve the purpose, the invention adopts the following technical scheme:
a treatment device for waste gas containing carbon disulfide comprises a carbon disulfide purification tower, a first separator, a water circulating pump, a regenerated water circulating pump, a reboiler, a tower top cooler, a second separator, a circulating heat exchanger, a waste water regeneration tower and a circulating cooler, wherein a waste gas outlet is arranged at the top of the carbon disulfide purification tower, a first water inlet, a second water inlet and a carbon disulfide waste gas inlet are arranged on the side wall of the carbon disulfide purification tower, the second water inlet is positioned below the first water inlet, the carbon disulfide waste gas inlet is positioned below the second water inlet, a mixed liquid outlet is arranged at the bottom of the carbon disulfide purification tower, the mixed liquid outlet is connected to a mixed liquid inlet arranged on the first separator through a pipeline, a carbon disulfide product outlet is arranged at the top of the first separator, and a third water outlet is arranged on the side wall of the first separator, the third water outlet is connected with an inlet of a water circulating pump through a pipeline, an outlet of the water circulating pump is respectively connected with an inlet of a circulating heat exchanger and a third water inlet arranged on the side wall of a wastewater regeneration tower through pipelines, an outlet of the circulating heat exchanger is connected with a second water inlet through a pipeline, a fourth water outlet is arranged at the bottom of the wastewater regeneration tower and is connected with an inlet of a regenerated water circulating pump, an outlet of the regenerated water circulating pump is connected with an inlet of a circulating cooler, an outlet of the circulating cooler is connected with a first water inlet, an outlet at the top of the wastewater regeneration tower is connected with an inlet of a tower top cooler through a pipeline, an outlet of the tower top cooler is connected with an inlet arranged on a second separator, a fifth water outlet is arranged on the side wall of the second separator and is connected to a fifth water inlet arranged on the wastewater regeneration tower through a pipeline, the bottom of second separator is provided with carbon disulfide and retrieves the mouth, carbon disulfide retrieves the mouth and passes through the carbon disulfide import of pipe connection to first separator top setting, a port of reboiler is connected to on the pipeline between reclaimed water circulating pump and the fourth delivery port, another port of reboiler passes through the circulation port intercommunication that sets up on pipeline and the waste water regeneration tower.
A treatment method of the treatment device for the waste gas containing the carbon disulfide comprises the following steps:
step 1, conveying waste gas containing carbon disulfide into a carbon disulfide purification tower, wherein the carbon disulfide purification tower adopts water as an absorbent, the temperature of the water is not higher than 40 ℃, mixed liquid containing carbon disulfide and water is produced through the carbon disulfide purification tower, and the treated waste gas containing carbon disulfide is discharged from the top of the tower;
and 4, further separating the separated wastewater by a wastewater regeneration tower, dividing the separated recovered water into two paths, conveying one path of the recovered water to the carbon disulfide purification tower by a regenerated water circulating pump and a circulating cooler, returning the other path of the recovered water to the wastewater regeneration tower by a reboiler, allowing carbon disulfide in the wastewater regeneration tower to enter a second separator by a tower top cooler for further separation, refluxing the separated recovered water to the wastewater regeneration tower, and refluxing the separated carbon disulfide to the first separator.
Further, the temperature of the water in the step 1 is 0-10 ℃.
Further, the carbon disulfide mass fraction in the wastewater separated in the step 3 is 0.2% -0.3%.
Further, the mass ratio of the separated wastewater conveyed back to the carbon disulfide purification tower in the step 3 is 50-90%, and the mass ratio of the separated wastewater conveyed to the wastewater regeneration tower is 10-50%.
Further, the mass concentration of the carbon disulfide in the separated recovered water conveyed back to the carbon disulfide purification tower in the step 4 is lower than 0.01%.
Further, the waste water regeneration tower is a packed tower or a plate tower, and the operating pressure of the waste water regeneration tower is normal pressure to 0.2MPa (G); the carbon disulfide purification tower is a packed tower or a plate tower.
The invention has the beneficial effects that:
(1) compared with the traditional scheme, the method can lead the tail gas to be discharged after one-time treatment and reach the standard, and simultaneously all the carbon disulfide can be recycled. Meanwhile, fuels such as natural gas, diesel oil and the like are not consumed, industrial raw materials such as liquid caustic soda, lime and the like are not used as an absorbent, and the cost is greatly reduced.
(2) The content of the treated carbon disulfide is from 0.1 to 40 percent, the carbon disulfide can be directly treated by using a purification tower without pre-cooling, the investment of a freezing heat exchanger and freezing equipment is reduced, and the freezing energy consumption is reduced.
(3) No matter how high the content of carbon disulfide in the tail gas is, the concentration of the carbon disulfide in the treated tail gas can be controlled to be 1mg/m3The emission standard of the state GB/T14554 is completely achieved, and direct emission is realized.
(4) According to the difference of the carbon disulfide content in the waste gas, the purification towers with different tower plates are selected, the actual operation flexibility is larger, and the treatment requirements of different working conditions can be met.
(5) The absorbent is water, the carbon disulfide in the waste gas is mostly removed by the principle of gas phase displacement by increasing the retention time of the waste gas containing carbon disulfide through the countercurrent of water, the gas-liquid balance data of the carbon disulfide and the water under different concentrations are obtained by using actual experimental measurement, the produced mixed liquid containing the liquid carbon disulfide and the water is output to a first separator, the carbon disulfide is separated by the first separator, the carbon disulfide is recovered as a product, one part of the water obtained in the mixed liquid is conveyed back to a second inlet to purify the waste gas containing the carbon disulfide in a purification tower, the other part of the water is matched with a waste water regeneration tower, a reboiler, a tower top cooler and a second separator to reduce the content of the carbon disulfide in the water, the purity of the water is ensured, and then the water flows back to a carbon disulfide purification tower from a first water inlet, the concentration of the carbon disulfide in the outlet gas phase is ensured to be sufficiently low, thereby realizing the recycling of water.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
Detailed Description
Example 1
As shown in fig. 1, a processing apparatus for waste gas containing carbon disulfide comprises a carbon disulfide purification tower 1, a first separator 2, a water circulation pump 3, a regenerated water circulation pump 4, a reboiler 5, a tower top cooler 6, a second separator 7, a circulating heat exchanger 8, a waste water regeneration tower 9, and a circulating cooler 10, wherein a waste gas outlet 101 is arranged at the top of the carbon disulfide purification tower 1, a first water inlet 102, a second water inlet 103, and a carbon disulfide waste gas inlet 104 are arranged on the side wall of the carbon disulfide purification tower 1, the second water inlet 103 is located below the first water inlet 102, the carbon disulfide waste gas inlet 104 is located below the second water inlet 103, a mixed liquid outlet 105 is arranged at the bottom of the carbon disulfide purification tower 1, the mixed liquid outlet 105 is connected to a mixed liquid inlet 201 arranged on the first separator 2 through a pipeline, a carbon disulfide product outlet 202 is arranged at the top of the first separator 2, a third water outlet 203 is arranged on the side wall of the first separator 2, the third water outlet 203 is connected with an inlet of a water circulating pump 3 through a pipeline, an outlet of the water circulating pump 3 is respectively connected with an inlet of a circulating heat exchanger 8 and a third water inlet 901 arranged on the side wall of a wastewater regeneration tower 9 through pipelines, an outlet of the circulating heat exchanger 8 is connected with a second water inlet 103 through a pipeline, a fourth water outlet 902 is arranged at the bottom of the wastewater regeneration tower 9, the fourth water outlet 902 is connected with an inlet of the regenerated water circulating pump 3, an outlet of the regenerated water circulating pump 3 is connected with an inlet of a circulating cooler 10, an outlet of the circulating cooler 10 is connected with a first water inlet 102, a top outlet 905 of the wastewater regeneration tower 9 is connected with an inlet of a tower top cooler 6 through a pipeline, an outlet of the tower top cooler 6 is connected with an inlet 703 arranged on a second separator 7, be provided with fifth delivery port 701 on the second separator 7 lateral wall, fifth delivery port 701 is connected to the fifth water inlet 903 that sets up on the waste water regeneration tower 9 through the pipeline, the bottom of second separator 7 is provided with carbon disulfide recovery mouth 702, carbon disulfide recovery mouth 702 is connected to the carbon disulfide import 204 that first separator 2 top set up through the pipeline, a port of reboiler 5 is connected to on the pipeline between recycled water circulating pump 4 and the fourth delivery port 902, another port of reboiler 5 communicates through the circulation port 904 that sets up on pipeline and the waste water regeneration tower 9.
The content of carbon disulfide-containing waste gas is shown in the following table
| Substance(s) | N2 | CS2 | H2O |
| Content% | 90 | 8 | 2 |
The temperature is 20 ℃ and the flow rate is 130m3The waste gas/h can use a carbon disulfide purification tower 9 with a regular packing having 10 trays, the water circulation amount is 200kg/h, wherein 150kg/h of water directly enters the 3 rd tray of the carbon disulfide purification tower 9 after passing through a first separator 2, 50kg/h of waste water is sent into the carbon disulfide purification tower 1 through a first water inlet 102 after passing through a waste water regeneration tower 9, and the carbon disulfide concentration in the waste gas discharge is 0.4mg/m3Zero discharge of waste water, and basically complete recovery of carbon disulfide。
A method for treating waste gas containing carbon disulfide, comprising the following steps:
step 1, adding 130m containing the components at the temperature of 20 DEG C3The method comprises the following steps that/h waste gas containing carbon disulfide is conveyed to a carbon disulfide purification tower 1 with a regular packing and 10 tower plates, water is adopted as an absorbent in the carbon disulfide purification tower 1, the water circulation amount is 200kg/h, the temperature of the water is 10 ℃, mixed liquid containing carbon disulfide and water is produced through the carbon disulfide purification tower 1, the treated waste gas containing carbon disulfide is discharged from the top of the tower, and the discharge concentration of the carbon disulfide is 0.4mg/m3；
and 4, further separating the separated wastewater by a wastewater regeneration tower 9, wherein the operating pressure of the wastewater regeneration tower 9 is normal pressure, the separated recovered water is divided into two paths, one path of the recovered water is conveyed back to the carbon disulfide purification tower 1 by a regenerated water circulating pump 4 and a circulating cooler 10 at a rate of 50kg/h, the mass concentration of the carbon disulfide is lower than 0.01%, the other path of the recovered water returns to the wastewater regeneration tower 9 by a reboiler 5, the carbon disulfide in the wastewater regeneration tower 9 enters a second separator 7 through a tower top cooler 6 for further separation, the separated recovered water flows back to the wastewater regeneration tower 9, and the separated carbon disulfide flows back to the first separator 2.
Example 2
The content of carbon disulfide-containing waste gas is shown in the following table
| Substance(s) | N2 | CS2 | H2O |
| Content% | 80 | 18 | 2 |
The waste gas with the temperature of 40 ℃ and the flow rate of 500m3/h can use a carbon disulfide purification tower 9 with structured packing with 14 trays, the water circulation amount is 1400kg/h, wherein 1000kg/h of water directly enters the 3 rd tray of the carbon disulfide purification tower 9 after passing through a first separator 2, and 400kg/h of waste water is sent into a carbon disulfide purification tower 1 through a first water inlet 102 after passing through a waste water regeneration tower 9, so that the carbon disulfide concentration in the waste gas discharge is 0.3mg/m3, the zero discharge of waste water is realized, and the carbon disulfide can be basically and completely recovered.
A method for treating waste gas containing carbon disulfide by using the device in example 1, comprising the following steps:
step 1, adding 500m containing the components at the temperature of 40 DEG C3The/h carbon disulfide-containing waste gas is conveyed to a carbon disulfide purification tower 1 with a regular packing of 14 trays, the carbon disulfide purification tower 1 adopts water as an absorbent, the water circulation amount is 1400kg/h, the temperature of the water is 0 ℃, mixed liquid containing carbon disulfide and water is produced through the carbon disulfide purification tower 1, the treated carbon disulfide-containing waste gas is discharged from the top of the tower, and the carbon disulfide discharge concentration is 0.3mg/m3；
and 4, further separating the separated wastewater by a wastewater regeneration tower 9, wherein the operating pressure of the wastewater regeneration tower 9 is 0.15MPa, the separated recovered water is divided into two paths, one path of the recovered water is conveyed back to the carbon disulfide purification tower 1 by a regenerated water circulating pump 4 and a circulating cooler 10 at 400kg/h, the mass concentration of the carbon disulfide is lower than 0.01%, the other path of the recovered water returns to the wastewater regeneration tower 9 by a reboiler 5, the carbon disulfide in the wastewater regeneration tower 9 enters a second separator 7 by a tower top cooler 6 for further separation, the separated recovered water flows back to the wastewater regeneration tower 9, and the separated carbon disulfide flows back to the first separator 2.
Example 3
The content of carbon disulfide-containing waste gas is shown in the following table
| Substance(s) | N2 | CS2 | H2O |
| Content% | 96 | 3 | 1 |
The temperature is 40 ℃ and the flow rate is 300m3The waste gas/h can use a structured packing carbon disulfide purification tower 9 with 9 trays, the water circulation amount is 150kg/h, wherein 110kg/h water directly enters the 3 rd tray of the carbon disulfide purification tower 9 after passing through a first separator 2, 40kg/h waste water is sent into the carbon disulfide purification tower 1 through a first water inlet 102 after passing through a waste water regeneration tower 9, and the carbon disulfide concentration in the waste gas discharge is 0.5mg/m3Zero discharge of waste water and basically complete recovery of carbon disulfide.
A method for treating waste gas containing carbon disulfide by using the device in example 1, comprising the following steps:
step 1, adding the components at the temperature of 40 ℃ for 300m3The method comprises the following steps that/h waste gas containing carbon disulfide is conveyed to a carbon disulfide purification tower 1 with regular packing and 9 tower plates, water is adopted as an absorbent in the carbon disulfide purification tower 1, the water circulation amount is 150kg/h, the temperature of the water is 5 ℃, mixed liquid containing carbon disulfide and water is produced through the carbon disulfide purification tower 1, the treated waste gas containing carbon disulfide is discharged from the top of the tower, and the discharge concentration of the carbon disulfide is 0.3mg/m3；
Step 2: conveying a mixed liquid containing carbon disulfide and water from a carbon disulfide purification tower 1 into a first separator 2;
and 4, further separating the separated wastewater by a wastewater regeneration tower 9, wherein the operating pressure of the wastewater regeneration tower 9 is 0.2MPa, the separated recovered water is divided into two paths, one path of the separated recovered water is conveyed back to the carbon disulfide purification tower 1 by a regenerated water circulating pump 4 and a circulating cooler 10 at 40kg/h, the mass concentration of the carbon disulfide is lower than 0.01%, the other path of the separated recovered water returns to the wastewater regeneration tower 9 by a reboiler 5, the carbon disulfide in the wastewater regeneration tower 9 enters a second separator 7 through a tower top cooler 6 for further separation, the separated recovered water returns to the wastewater regeneration tower 9, and the separated carbon disulfide returns to the first separator 2.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (7)
1. A processing apparatus who contains carbon disulfide waste gas which characterized in that: the device comprises a carbon disulfide purification tower (1), a first separator (2), a water circulating pump (3), a regenerated water circulating pump (4), a reboiler (5), a tower top cooler (6), a second separator (7), a circulating heat exchanger (8), a wastewater regeneration tower (9) and a circulating cooler (10), wherein a waste gas outlet (101) is formed in the top of the carbon disulfide purification tower (1), a first water inlet (102), a second water inlet (103) and a carbon disulfide waste gas inlet (104) are formed in the side wall of the carbon disulfide purification tower (1), the second water inlet (103) is formed below the first water inlet (102), the carbon disulfide waste gas inlet (104) is formed below the second water inlet (103), a mixed liquid outlet (105) is formed in the bottom of the carbon disulfide purification tower (1), and the mixed liquid outlet (105) is connected to a mixed liquid inlet (201) formed in the first separator (2) through a pipeline, a carbon disulfide product outlet (202) is arranged at the top of the first separator (2), a third water outlet (203) is arranged on the side wall of the first separator (2), the third water outlet (203) is connected with an inlet of a water circulating pump (3) through a pipeline, an outlet of the water circulating pump (3) is respectively connected with an inlet of a circulating heat exchanger (8) and a third water inlet (901) arranged on the side wall of a wastewater regeneration tower (9) through pipelines, an outlet of the circulating heat exchanger (8) is connected with a second water inlet (103) through a pipeline, a fourth water outlet (902) is arranged at the bottom of the wastewater regeneration tower (9), the fourth water outlet (902) is connected with an inlet of a regenerated water circulating pump (3), an outlet of the regenerated water circulating pump (3) is connected with an inlet of a circulating cooler (10), an outlet of the circulating cooler (10) is connected with a first water inlet (102), the top outlet (905) of the waste water regeneration tower (9) is connected with the inlet of the tower top cooler (6) through a pipeline, the outlet of the tower top cooler (6) is connected with the inlet (703) arranged on the second separator (7), a fifth water outlet (701) is arranged on the side wall of the second separator (7), the fifth water outlet (701) is connected to a fifth water inlet (903) arranged on the wastewater regeneration tower (9) through a pipeline, a carbon disulfide recovery port (702) is arranged at the bottom of the second separator (7), the carbon disulfide recovery port (702) is connected to a carbon disulfide inlet (204) arranged at the top of the first separator (2) through a pipeline, one port of the reboiler (5) is connected to a pipeline between the regeneration water circulating pump (4) and the fourth water outlet (902), and the other port of the reboiler (5) is communicated with a circulating port (904) arranged on the wastewater regeneration tower (9) through a pipeline.
2. A method for treating the carbon disulfide-containing waste gas as set forth in claim 1, wherein: the method comprises the following steps:
step 1, conveying waste gas containing carbon disulfide into a carbon disulfide purification tower (1), wherein water is adopted as an absorbent in the carbon disulfide purification tower (1), the temperature of the water is not higher than 40 ℃, mixed liquid containing carbon disulfide and water is produced through the carbon disulfide purification tower (1), and the treated waste gas containing carbon disulfide is discharged from the top of the tower;
step 2, conveying mixed liquid containing carbon disulfide and water from the carbon disulfide purification tower (1) to a first separator (2);
step 3, separating mixed liquid containing carbon disulfide and water in a first separator (2), outputting the separated carbon disulfide serving as a product from the bottom of the first separator (2), conveying one part of the separated wastewater back to a carbon disulfide purification tower (1) through a water circulating pump (3) and a circulating heat exchanger (8), and conveying the other part of the separated wastewater to a wastewater regeneration tower (9);
and 4, further separating the separated wastewater through a wastewater regeneration tower (9), dividing the separated recovered water into two paths, wherein one path of the recovered water is conveyed back to the carbon disulfide purification tower (1) through a regenerated water circulating pump (4) and a circulating cooler (10), the other path of the recovered water returns to the wastewater regeneration tower (9) through a reboiler (5), the carbon disulfide in the wastewater regeneration tower (9) enters a second separator (7) through a tower top cooler (6) for further separation, the separated recovered water flows back to the wastewater regeneration tower (9), and the separated carbon disulfide flows back to the first separator (2).
3. The method for treating waste gas containing carbon disulfide as recited in claim 2, wherein: the temperature of the water in the step 1 is 0-10 ℃.
4. The method for treating waste gas containing carbon disulfide as recited in claim 2, wherein: the carbon disulfide mass fraction in the wastewater separated in the step 3 is 0.2-0.3%.
5. The method for treating waste gas containing carbon disulfide as recited in claim 2, wherein: the proportion of the separated wastewater conveyed back to the carbon disulfide purification tower (1) in the step 3 is 50-90 wt%, and the proportion of the separated wastewater conveyed to the wastewater regeneration tower (9) is 10-50 wt%.
6. The method for treating waste gas containing carbon disulfide as recited in claim 2, wherein: and in the step 4, the mass concentration of the carbon disulfide in the separated recovered water conveyed back to the carbon disulfide purification tower (1) is lower than 0.01%.
7. The method for treating waste gas containing carbon disulfide as recited in claim 2, wherein: the waste water regeneration tower (9) is a packed tower or a plate tower, and the operating pressure of the waste water regeneration tower (9) is normal pressure to 0.2 MPa; the carbon disulfide purification tower (1) is a packed tower or a plate tower.
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