CN111265969A - Method for efficiently recovering carbon disulfide from tail gas - Google Patents
Method for efficiently recovering carbon disulfide from tail gas Download PDFInfo
- Publication number
- CN111265969A CN111265969A CN202010200713.8A CN202010200713A CN111265969A CN 111265969 A CN111265969 A CN 111265969A CN 202010200713 A CN202010200713 A CN 202010200713A CN 111265969 A CN111265969 A CN 111265969A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- carbon disulfide
- receiving tank
- pressure
- efficiently recovering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
- B01D5/0012—Vertical tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the field of tail gas treatment, and provides a method for efficiently recovering carbon disulfide from tail gas, wherein after the tail gas is condensed, the condensed tail gas is released into a carbon disulfide receiving tank through pressure control; the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa; carbon disulfide in the condensation tail gas is liquefied in the carbon disulfide receiving tank, and the unliquefied tail gas is discharged from the carbon disulfide receiving tank outlet. According to the invention, the pressure of the carbon disulfide receiving tank is controlled within the range, and the characteristic that carbon disulfide is easy to liquefy under the condition of increased pressure is utilized, so that the carbon disulfide source is continuously liquefied, the recovery rate of carbon disulfide in tail gas is effectively improved, and other gases in the tail gas are continuously discharged without influencing the recovery of carbon disulfide. The method provided by the invention can greatly improve the recovery rate of the carbon disulfide in the tail gas, and the example results show that the recovery rate of the carbon disulfide in the tail gas can reach 95%.
Description
Technical Field
The invention relates to the field of tail gas treatment, in particular to a method for efficiently recovering carbon disulfide from tail gas.
Background
At present, carbon disulfide in tail gas is generally collected by a freezing recovery method, but the recovery rate of the method is low, and a large amount of carbon disulfide in the tail gas cannot be recovered.
At present, the market competition is fierce, carbon disulfide is taken as an important raw material, and the cost can be greatly reduced if the consumption is reduced, so that enterprises are more competitive; and if the tail gas with higher carbon disulfide content is directly discharged, the environmental protection is not facilitated. Therefore, how to improve the recovery rate of carbon disulfide in tail gas is a problem to be solved urgently at present.
Disclosure of Invention
The invention provides a method for efficiently recovering carbon disulfide from tail gas, which can greatly improve the recovery rate of carbon disulfide in the tail gas, and the recovery rate of carbon disulfide in the tail gas can reach 95%.
The invention provides a method for efficiently recovering carbon disulfide from tail gas, which comprises the following steps:
condensing the tail gas to obtain condensed tail gas, and then inputting the condensed tail gas into a carbon disulfide receiving tank; the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa;
carbon disulfide in the condensation tail gas is liquefied in the carbon disulfide receiving tank, and the unliquefied tail gas is discharged from the carbon disulfide receiving tank outlet.
Preferably, the volume fraction of carbon disulfide in the tail gas is 1-10%.
Preferably, the components of the tail gas include carbon disulfide, hydrogen sulfide and benzothiazole.
Preferably, the tail gas is high-temperature and high-pressure tail gas, the pressure of the tail gas is 1-10 MPa, and the temperature of the tail gas is 30-200 ℃; the flow rate of the tail gas is 20-200 kg/h.
Preferably, the temperature of the cooling water for condensation is-20 ℃ to 20 ℃.
Preferably, after the condensation is finished, the temperature of the condensation tail gas is-10-20 ℃.
Has the advantages that:
the invention provides a method for efficiently recovering carbon disulfide from tail gas, which comprises the steps of condensing the tail gas to obtain condensed tail gas, and inputting the condensed tail gas into a carbon disulfide receiving tank; the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa; carbon disulfide in the condensation tail gas is liquefied in the carbon disulfide receiving tank, and the unliquefied tail gas is discharged from the carbon disulfide receiving tank outlet. According to the invention, the pressure of the carbon disulfide receiving tank is controlled within the range, and the characteristic that condensed carbon disulfide is easy to liquefy under the condition of increased pressure is utilized, so that the carbon disulfide source is continuously liquefied, the recovery rate of carbon disulfide in tail gas is effectively improved, and other gases in the tail gas are continuously discharged without influencing the recovery of carbon disulfide. The method provided by the invention can greatly improve the recovery rate of the carbon disulfide in the tail gas, and the example results show that the recovery rate of the carbon disulfide in the tail gas can reach 95%.
Drawings
FIG. 1 is a diagram of an apparatus according to example 1 of the present invention.
Detailed Description
The invention provides a method for efficiently recovering carbon disulfide from tail gas, which comprises the following steps:
condensing the tail gas to obtain condensed tail gas, and then inputting the condensed tail gas into a carbon disulfide receiving tank; the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa;
carbon disulfide in the condensation tail gas is liquefied in the carbon disulfide receiving tank, and the unliquefied tail gas is discharged from the carbon disulfide receiving tank outlet.
The invention has no special requirement on the source of the tail gas, and the tail gas with the volume fraction of carbon disulfide of 1-10 percent in the tail gas is suitable for the invention. In the embodiment of the invention, the components of the tail gas preferably comprise carbon disulfide, hydrogen sulfide and benzothiazole, and the volume ratio of the carbon disulfide, the hydrogen sulfide and the benzothiazole in the tail gas is preferably 1-10: 70-95: 0.01-10. In the invention, the tail gas is preferably high-temperature high-pressure tail gas, the pressure of the tail gas is preferably 1-10 MPa, and the temperature of the tail gas is preferably 30-200 ℃; the flow rate of the tail gas is preferably 20 kg/h-200 kg/h.
The invention was tested according to the apparatus diagram shown in FIG. 1.
According to the invention, the tail gas is preferably conveyed to the water-sealed tank through a pressure control valve, the benzothiazole in the tail gas can automatically settle into liquid due to large specific gravity and low saturated vapor pressure, the liquid is remained in the water-sealed tank and generally accounts for 80% of the water-sealed tank after reaching a certain liquid level, the liquid benzothiazole in the water-sealed tank is subjected to benzothiazole purification treatment, and the benzothiazole is collected.
Then will be by water seal tank outlet exhaust tail gas through the tubulation condenser condensation, then will condense tail gas and get into carbon disulfide and receive jar collection carbon disulfide, the carbon disulfide in the tail gas is liquefied in carbon disulfide receives jar, and other compositions in the tail gas do not liquefy, receive the gas outlet discharge of jar from carbon disulfide. According to the invention, the carbon disulfide receiving tank is internally provided with the pressure transmitter, and the internal pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa by controlling the pressure transmitter.
In the present invention, the tail gas is preferably condensed by using cooling water, the condensation is preferably performed in a shell and tube condenser, and the specific method is preferably as follows: and introducing tail gas on the tube side and cooling water on the shell side. In the invention, the temperature of the cooling water is preferably-20 ℃, more preferably-10-20 ℃, and even more preferably-5-1 ℃. In the invention, the heat exchange area of the tube bundle condenser is preferably 20-30 m2. In the invention, after the condensation treatment is finished, the temperature of the condensation tail gas is preferably-10-20 ℃.
And after the condensation is finished, the condensation tail gas enters a carbon disulfide receiving tank. In the invention, the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa. According to the invention, the pressure of the carbon disulfide receiving tank is controlled within the range, and the characteristic that carbon disulfide is easy to liquefy under the condition of increased pressure is utilized, so that the carbon disulfide source is continuously liquefied, the recovery rate of carbon disulfide in tail gas is effectively improved, and other gases in the tail gas are continuously discharged without influencing the recovery of carbon disulfide. In addition, the pressure of the carbon disulfide receiving tank is controlled within the range, the gas temperature after throttling expansion is sharply reduced by utilizing the throttling expansion principle, and the liquefaction of the carbon disulfide can be effectively promoted. In the invention, the temperature of the condensed tail gas in the carbon disulfide receiving tank is preferably-10-20 ℃, which is beneficial to promoting the liquefaction of carbon disulfide.
In the carbon disulfide receiving tank, carbon disulfide in the tail gas is liquefied, and the liquefied carbon disulfide stays in the carbon disulfide receiving tank, so that the high-efficiency recovery of the carbon disulfide in the tail gas is realized; while the other components of the tail gas are removed from the carbon disulfide receiving tank.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.
Example 1
Adopt the cooling water to carry out the shell and tube condensation with tail gas, then in getting into the carbon disulfide receiver, the pressure of carbon disulfide receiver is 1.0MPa, and the carbon disulfide in the tail gas liquefies in the carbon disulfide receiver, and liquefied carbon disulfide can regard as the raw materials to recycle, from carbon disulfide receiver export exhaust purification tail gas, purification tail gas gets into the combustion of claus stove.
Wherein the tail gas consists of carbon disulfide, hydrogen sulfide and benzothiazole, and the volume fractions of the carbon disulfide, the hydrogen sulfide and the benzothiazole in the tail gas are respectively 4.5%, 95% and 0.5%; the tail gas is high-temperature and high-pressure tail gas, the pressure is 10MPa, the temperature is 200 ℃, and the flow of the tail gas is 200 kg/h;
the temperature of cooling water for tube array condensation is 1 ℃; the heat exchange area of the condensation of the tube array is 20-30 m2；
The internal temperature of the carbon disulfide receiver was-20 ℃.
The carbon disulfide content in the purification tail gas of following carbon disulfide receiver export exhaust is tested, and the test result is: the content of carbon disulfide in the purified tail gas is 0.1 percent, which shows that the recovery rate of the carbon disulfide in the tail gas by the method provided by the invention can reach more than 95 percent.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for efficiently recovering carbon disulfide from tail gas comprises the following steps:
condensing the tail gas to obtain condensed tail gas, and then inputting the condensed tail gas into a carbon disulfide receiving tank; the pressure of the carbon disulfide receiving tank is 1.0-2.0 MPa;
carbon disulfide in the condensation tail gas is liquefied in the carbon disulfide receiving tank, and the unliquefied tail gas is discharged from the carbon disulfide receiving tank outlet.
2. The method for efficiently recovering carbon disulfide from tail gas according to claim 1, wherein the volume fraction of carbon disulfide in the tail gas is from 1% to 10%.
3. A method for efficient recovery of carbon disulphide from the off-gas according to claim 1 or 2, wherein the composition of the off-gas comprises carbon disulphide, hydrogen sulphide and benzothiazole.
4. The method for efficiently recovering carbon disulfide from tail gas according to claim 1, wherein the tail gas is high-temperature and high-pressure tail gas, the pressure of the tail gas is 1-10 MPa, and the temperature of the tail gas is 30-200 ℃; the flow rate of the tail gas is 20-200 kg/h.
5. The method for efficiently recovering carbon disulfide from tail gas according to claim 1, wherein the temperature of cooling water for condensation is-20 ℃ to 20 ℃.
6. The method for efficiently recovering carbon disulfide from tail gas according to claim 1, wherein the temperature of the condensed tail gas is-10 to 20 ℃ after the condensation is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010200713.8A CN111265969A (en) | 2020-03-20 | 2020-03-20 | Method for efficiently recovering carbon disulfide from tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010200713.8A CN111265969A (en) | 2020-03-20 | 2020-03-20 | Method for efficiently recovering carbon disulfide from tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111265969A true CN111265969A (en) | 2020-06-12 |
Family
ID=70991752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010200713.8A Pending CN111265969A (en) | 2020-03-20 | 2020-03-20 | Method for efficiently recovering carbon disulfide from tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111265969A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042883A (en) * | 1989-10-17 | 1990-06-13 | 成都化学纤维厂 | The method for separating and processing of resultant of reaction in the carbon disulphide production process |
| WO2000053290A1 (en) * | 1999-03-08 | 2000-09-14 | Paques Bio Systems B.V. | Method for desulphurization of gases |
| CN203060883U (en) * | 2013-01-21 | 2013-07-17 | 成都丽雅纤维股份有限公司 | Waste gas recovery system for producing carbon disulfide |
| CN203964550U (en) * | 2014-06-16 | 2014-11-26 | 成都丽雅纤维股份有限公司 | In carbon disulfide preparation process, from hydrogen sulfide tail gas, reclaim the device of carbon disulfide |
| CN206613334U (en) * | 2016-11-30 | 2017-11-07 | 成都丽雅纤维股份有限公司 | The recovery system of waste gas in a kind of viscose rayon production |
| CN109095468A (en) * | 2017-12-27 | 2018-12-28 | 山西铁峰化工有限公司 | A method of carbon disulfide is prepared by raw material of hydrogen sulfide |
| CN208471550U (en) * | 2018-05-30 | 2019-02-05 | 重庆兴发金冠化工有限公司 | A kind of production system of automatic recycling carbon disulfide |
| CN110420534A (en) * | 2019-08-17 | 2019-11-08 | 上海协柯环保设备有限公司 | A kind of carbon disulfide exhaust gas recovery system and method |
-
2020
- 2020-03-20 CN CN202010200713.8A patent/CN111265969A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1042883A (en) * | 1989-10-17 | 1990-06-13 | 成都化学纤维厂 | The method for separating and processing of resultant of reaction in the carbon disulphide production process |
| WO2000053290A1 (en) * | 1999-03-08 | 2000-09-14 | Paques Bio Systems B.V. | Method for desulphurization of gases |
| CN203060883U (en) * | 2013-01-21 | 2013-07-17 | 成都丽雅纤维股份有限公司 | Waste gas recovery system for producing carbon disulfide |
| CN203964550U (en) * | 2014-06-16 | 2014-11-26 | 成都丽雅纤维股份有限公司 | In carbon disulfide preparation process, from hydrogen sulfide tail gas, reclaim the device of carbon disulfide |
| CN206613334U (en) * | 2016-11-30 | 2017-11-07 | 成都丽雅纤维股份有限公司 | The recovery system of waste gas in a kind of viscose rayon production |
| CN109095468A (en) * | 2017-12-27 | 2018-12-28 | 山西铁峰化工有限公司 | A method of carbon disulfide is prepared by raw material of hydrogen sulfide |
| CN208471550U (en) * | 2018-05-30 | 2019-02-05 | 重庆兴发金冠化工有限公司 | A kind of production system of automatic recycling carbon disulfide |
| CN110420534A (en) * | 2019-08-17 | 2019-11-08 | 上海协柯环保设备有限公司 | A kind of carbon disulfide exhaust gas recovery system and method |
Non-Patent Citations (1)
| Title |
|---|
| 张景仁: "《石棉橡胶板－垫圈材料》", 31 May 1979, 中国建筑工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106281476B (en) | A kind of method of sour gas in low temperature washing device for methanol and a kind of removing synthesis gas | |
| CN111303945B (en) | Low-energy-consumption and high-carbon-trapping-rate low-temperature methanol washing process method and device | |
| CN103463955B (en) | A kind of technique of separation and recovery carbon dioxide from industrial tail gas | |
| CN109999618B (en) | System and method for separating carbon dioxide from medium-high pressure gas source | |
| CN204752650U (en) | Utilize cryogenic separation's marsh gas purification and biological natural gas liquefaction device | |
| CN108423681A (en) | It is a kind of to absorb the carbon trapping qi exhaustion nitre purification technique combined with rectifying | |
| CN106000000A (en) | Device and method for performing multistage flash, resolution and separation on synthetic ammonia decarburization absorption tower bottom pregnant solution | |
| CN104031692A (en) | Device and method for preparing process heat medium water by directly quenching coking raw coke oven gas at high temperature | |
| CN103480275A (en) | Device and method for acid gas concentration, desalination and separation after doctor solution regeneration | |
| CN103157346B (en) | Low-temperature rectisol and CO 2trapping coupling process and system | |
| CN104263421B (en) | Coke oven gas purification method | |
| CN101434872B (en) | Method for adding distilled ammonia vapor into desulfurized solution in ammonia desulphurization process and special equipment thereof | |
| CN114459204B (en) | Coal chemical carbon dioxide tail gas low temperature capture purification liquefaction and separation system and method | |
| CN107445179A (en) | The retracting device of periodic off-gases and flashed vapour in a kind of synthesis ammonia system | |
| CN104495968A (en) | Negative-pressure ammonia distilling method used for heating ammonia distilling recycled waste water with coke oven crude gas waste heat | |
| CN111265969A (en) | Method for efficiently recovering carbon disulfide from tail gas | |
| CN216845328U (en) | A low-temperature capture, purification, liquefaction and separation system for coal chemical carbon dioxide tail gas | |
| CN216336618U (en) | Recovery of CO from chemical process2System for preparing nitrogen from waste gas | |
| CN210410096U (en) | Separation system for carbon dioxide in medium-high pressure gas source | |
| CN211159197U (en) | Non-condensable gas recycling device in slag water treatment system | |
| CN210303039U (en) | Recovery unit of organic matter in acrylonitrile absorption tower tail gas | |
| CN209848633U (en) | Methanol washing and recovering device in methanol synthesis flash evaporation gas | |
| CN113171625A (en) | Device and method for preparing liquid carbon dioxide in low-temperature methanol washing process | |
| CN113998677A (en) | Recovery of CO from chemical process2System and method for producing nitrogen from waste gas | |
| CN118179195B (en) | A condensation separation system and process suitable for CO2 capture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |