CN210278686U - Sulfur dioxide and hydrogen chloride containing tail gas recovery processing device - Google Patents
Sulfur dioxide and hydrogen chloride containing tail gas recovery processing device Download PDFInfo
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- CN210278686U CN210278686U CN201921177790.5U CN201921177790U CN210278686U CN 210278686 U CN210278686 U CN 210278686U CN 201921177790 U CN201921177790 U CN 201921177790U CN 210278686 U CN210278686 U CN 210278686U
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Abstract
The utility model belongs to tail gas treatment retrieves the field, concretely relates to contain sulfur dioxide, hydrogen chloride tail gas recovery processing device. The purity of the hydrogen chloride device separated after being treated by the recovery device exceeds 99 percent, the purity of sulfur dioxide exceeds 99 percent, the recovery rate of tail gas is higher than 95 percent, the high-efficiency resource utilization of the tail gas is realized, the generation of hazardous waste and waste salt is reduced, simultaneously, the possibility is provided for further recovering materials carried in the tail gas, and certain economic benefit is brought to a factory.
Description
Technical Field
The utility model belongs to tail gas treatment retrieves the field, concretely relates to contain sulfur dioxide, hydrogen chloride tail gas recovery processing device.
Background
A large amount of tail gas is generated in the chemical production process, and the direct emission can cause environmental pollution, so the tail gas can be emitted only after the qualified treatment of the tail gas reaches the standard. At present, a small amount of volatile tail gas and a large amount of tail gas containing hydrogen chloride and sulfur dioxide are generated in the production process of methyl chloropropionate, and the tail gas can reach the standard and be discharged after being treated.
At present, technologies such as absorption, adsorption are adopted in the industrial field to treat tail gas and are relatively mature, the technologies such as water absorption, alkali absorption and activated carbon adsorption and treatment devices are mainly included, the treatment effect can meet the requirement of standard emission, high-purity components cannot be obtained in the treatment process, and the tail gas resources cannot be fully utilized, so that the research on a recovery treatment device capable of fully utilizing the tail gas is very important.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of above-mentioned problem, the utility model aims at providing a sulfur dioxide, hydrogen chloride tail gas recovery processing device, the device can carry out make full use of to the tail gas resource, realizes the high-efficient utilization of tail gas.
The utility model discloses a realize through following technical scheme: a tail gas recovery processing device containing sulfur dioxide and hydrogen chloride comprises a compressor, a rectifying tower, a condenser and a receiving tank, and is characterized in that the tail gas enters an inlet gas cooler through a tail gas collecting pipeline, the inlet gas cooler is connected with an inlet gas buffer tank through a pipeline, the inlet gas buffer tank is connected with the compressor, an outlet of the compressor is connected with a compression buffer tank, the compression buffer tank is connected with a hydrogen chloride rectifying tower, a top outlet of the hydrogen chloride rectifying tower is connected with a hydrogen chloride condenser through a pipeline, an outlet of the hydrogen chloride condenser is connected with a hydrogen chloride receiving tank, and an outlet of the hydrogen chloride receiving tank is communicated with the next process through a hydrogen chloride pipeline; the bottom outlet of the hydrogen chloride rectifying tower is connected with a sulfur dioxide rectifying tower through a pipeline, the top outlet of the sulfur dioxide rectifying tower is connected with a sulfur dioxide condenser, the outlet of the sulfur dioxide condenser is connected with a sulfur dioxide receiving tank, and the sulfur dioxide receiving tank is communicated with the next process through a sulfur dioxide pipeline; the bottom outlet of the sulfur dioxide is connected with an air inlet buffer tank through a pipeline, and the outlet of the air inlet buffer tank is communicated with a solvent recovery pipeline.
Preferably, the outlet of the hydrogen chloride condenser is connected with the upper end of the hydrogen chloride rectifying tower through a first recovery pipe, and the first recovery pipe is provided with a regulating valve.
As a preferred scheme, the outlet of the sulfur dioxide condenser is also connected with the upper end of the sulfur dioxide rectifying tower through a second recovery pipe, and the second recovery pipe is provided with a regulating valve.
Preferably, the solvent recovery pipeline is provided with a circulating pump.
As a preferable scheme, a regulating valve is arranged on a pipeline connected between the compression buffer tank with the circulating water cooling system and the hydrogen chloride rectifying tower.
As the preferred scheme, the compression buffer tank adopts the compression buffer tank with temperature control and regulation, and a circulating water cooling system is arranged in the compression buffer tank.
As a preferable Freon, the hydrogen chloride rectifying tower and the sulfur dioxide rectifying tower adopt rectifying towers with different pressures.
The utility model has the advantages that: the purity of the hydrogen chloride device separated after being treated by the recovery device exceeds 99 percent, the purity of sulfur dioxide exceeds 99 percent, the recovery rate of tail gas is higher than 95 percent, the high-efficiency resource utilization of the tail gas is realized, the generation of hazardous waste and waste salt is reduced, simultaneously, the possibility is provided for further recovering materials carried in the tail gas, and certain economic benefit is brought to a factory.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the attached figure, 1 air inlet cooler, 2 air inlet buffer tanks, 3 compressors, 4 compression buffer tanks, 5 hydrogen chloride rectifying towers, 6 sulfur dioxide rectifying towers, 7 hydrogen chloride condensers, 71 recovery pipes I, 8 hydrogen chloride receiving tanks, 9 sulfur dioxide condensers, 91 recovery pipes II, 10 sulfur dioxide receiving tanks, 11 tail gas collecting pipelines, 12 hydrogen chloride pipelines, 13 sulfur dioxide pipelines, 14 solvent recovering pipelines, 15 regulating valves and 16 circulating pumps.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in FIG. 1, the recycling device of the present invention comprises a compressor 3, a rectifying tower, a condenser and a receiving tank.
Firstly, tail gas containing hydrogen chloride and sulfur dioxide generated in the production process of methyl chloropropionate is conveyed to an air inlet cooler 1 through a tail gas collecting pipeline 11, the tail gas is condensed by the air inlet cooler 1, the condensed tail gas is conveyed to an air inlet buffer tank 2 through a pipeline, then the tail gas enters a compressor 3 through the air inlet buffer tank 2, the tail gas is compressed to 2.0mpa and then enters a compression buffer tank 4, the compression buffer tank 4 is filled with a mixed material of hydrogen chloride gas and sulfur dioxide liquid, the tail gas is cooled to a certain temperature by the compression buffer tank 4 through a circulating water system, then fluid in the compression buffer tank 4 is conveyed to a hydrogen chloride rectifying tower 5 through a pipeline, the boiling point of hydrogen chloride is-10 ℃ and the boiling point of sulfur dioxide is 82 ℃ under the pressure of 2.0mpa, so that when the temperature at the top of the hydrogen chloride rectifying tower 5 is controlled to be-10 ℃, the hydrogen chloride can be extracted from the top of the tower, then the hydrogen chloride enters a hydrogen chloride receiving tank 8 after being condensed, and then the separated hydrogen chloride can be used in other production procedures;
the residual sulfur dioxide-containing material in the tower kettle of the hydrogen chloride rectifying tower 5 is conveyed to the sulfur dioxide rectifying tower 6 through a pipeline, the tower pressure of the sulfur dioxide rectifying tower 6 is controlled to be about 500KPa, the temperature of the tower top is controlled to be about 35 ℃, sulfur dioxide is extracted from the tower top at the moment, then the sulfur dioxide is conveyed to a sulfur dioxide receiving tank 10 after being condensed, and finally the sulfur dioxide enters a filling platform or other production procedures through a sulfur dioxide pipeline 13.
The liquid in the tower kettle of the sulfur dioxide rectifying tower 6 is recovered to the air inlet buffer tank 2, and the air inlet buffer tank 2 is connected with the solvent recovery system through a solvent recovery pipeline 14.
Furthermore, the outlet of the hydrogen chloride condenser 7 is connected with the upper end of the hydrogen chloride rectifying tower 5 through a first recovery pipe 71, and the purpose of the first recovery pipe 71 is to recover and separate materials again, so that the recovery rate is improved. The first recovery pipe 71 is provided with a regulating valve 15.
Further, the outlet of the sulfur dioxide condenser 9 is also connected with the upper end of the sulfur dioxide rectifying tower 6 through a second recovery pipe 91, the purpose of the recovery is to recycle materials, the recovery rate is improved, and the second recovery pipe 91 is provided with an adjusting valve 15.
Further, a circulation pump 16 is provided on the solvent recovery line 14.
Furthermore, a regulating valve 15 is arranged on a pipeline connected between the compression buffer tank 4 and the hydrogen chloride rectifying tower 5.
The function of the regulating valve 15 is to regulate the opening of the valve 15 according to the demand, thereby controlling the circulation of the pipe loop.
Further, the intake cooler 1 and the compression buffer tank 4 adopt circulating water as a cooling medium, the hydrogen chloride condenser 7 adopts liquid ammonia as a cooling medium, and the sulfur dioxide condenser 9 adopts circulating water as a cooling medium. The heating medium of the rectifying tower adopts low-pressure steam.
The vent gas and the non-condensable gas of the hydrogen chloride rectifying tower 5, the sulfur dioxide rectifying tower 6 and each device enter facilities of a secondary countercurrent water absorption tower and a primary alkali liquid falling film absorption tower for treatment, and the tail gas after the absorption treatment is discharged by a No. 1 tail gas exhaust funnel. Sulfite generated by the alkali liquor falling film absorption is evaporated by an MVR evaporation kettle, and a small amount of steam is discharged from a No. 2 tail gas exhaust funnel in the evaporation process. And after the steam is naturally condensed, the recovered condensate is discharged to a sewage treatment station in the plant for treatment. And treating the high-boiling residues left in the kettle as hazardous wastes.
After the tail gas is treated by the device, the recovery purity of the hydrogen chloride is 99.95 percent, the recovery purity of the sulfur dioxide is 99.5 percent, and the recovery rate of the tail gas reaches 97 percent.
Other technical features than those described in the specification are known to those skilled in the art.
Claims (7)
1. The tail gas recovery processing device containing sulfur dioxide and hydrogen chloride comprises a compressor (3), a rectifying tower, a condenser and a receiving tank, and is characterized in that the tail gas enters an air inlet cooler (1) through a tail gas collecting pipeline (11), the air inlet cooler (1) is connected with an air inlet buffer tank (2) through a pipeline, the air inlet buffer tank (2) is connected with the compressor (3), an outlet of the compressor (3) is connected with a compression buffer tank (4), the compression buffer tank (4) is connected with a hydrogen chloride rectifying tower (5), an outlet at the top of the hydrogen chloride rectifying tower (5) is connected with a hydrogen chloride condenser (7) through a pipeline, an outlet of the hydrogen chloride condenser (7) is connected with a hydrogen chloride receiving tank (8), and an outlet of the hydrogen chloride receiving tank (8) is connected with a next process through a hydrogen chloride pipeline (12);
the bottom outlet of the hydrogen chloride rectifying tower (5) is connected with a sulfur dioxide rectifying tower (6) through a pipeline, the top outlet of the sulfur dioxide rectifying tower (6) is connected with a sulfur dioxide condenser (9), the outlet of the sulfur dioxide condenser (9) is connected with a sulfur dioxide receiving tank (10), and the sulfur dioxide receiving tank (10) is connected with the next procedure through a sulfur dioxide pipeline (13);
the bottom outlet of the sulfur dioxide rectifying tower (6) is connected with the air inlet buffer tank (2) through a pipeline, and the outlet of the air inlet buffer tank (2) is communicated with the solvent recovery pipeline (14).
2. The tail gas recovery and treatment device containing sulfur dioxide and hydrogen chloride as claimed in claim 1, wherein the outlet of the hydrogen chloride condenser (7) is connected with the upper end of the hydrogen chloride rectifying tower (5) through a first recovery pipe (71), and the first recovery pipe (71) is provided with a regulating valve (15).
3. The tail gas recovery and treatment device containing sulfur dioxide and hydrogen chloride as claimed in claim 1, wherein the outlet of the sulfur dioxide condenser (9) is connected with the upper end of the sulfur dioxide rectifying tower (6) through a second recovery pipe (91), and the second recovery pipe (91) is provided with an adjusting valve (15).
4. The recovery and treatment device for tail gas containing sulfur dioxide and hydrogen chloride as claimed in claim 1, wherein the pipeline connected between the compression buffer tank (4) and the hydrogen chloride rectifying tower (5) is provided with a regulating valve (15).
5. The device for recycling and treating tail gas containing sulfur dioxide and hydrogen chloride as claimed in claim 1, wherein a circulation pump (16) is arranged on the solvent recycling pipeline (14).
6. The recovery and treatment device for tail gas containing sulfur dioxide and hydrogen chloride as claimed in claim 1 or 4, wherein the compression buffer tank (4) is a compression buffer tank with temperature control regulation, and a circulating water cooling system is arranged inside the compression buffer tank.
7. The device for recovering and treating the tail gas containing the sulfur dioxide and the hydrogen chloride as claimed in claim 1, wherein the hydrogen chloride rectifying tower (5) and the sulfur dioxide rectifying tower (6) adopt rectifying towers with different pressures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921177790.5U CN210278686U (en) | 2019-07-25 | 2019-07-25 | Sulfur dioxide and hydrogen chloride containing tail gas recovery processing device |
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| CN201921177790.5U CN210278686U (en) | 2019-07-25 | 2019-07-25 | Sulfur dioxide and hydrogen chloride containing tail gas recovery processing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634071A (en) * | 2020-04-27 | 2021-11-12 | 张吉瑞 | Method for recycling chemical tail gas and treatment device thereof |
| CN113955723A (en) * | 2021-11-02 | 2022-01-21 | 杭州聚纬科技工程有限公司 | Rectification separation purification method and system for gas containing hydrogen chloride sulfur dioxide |
| CN115849308A (en) * | 2022-11-17 | 2023-03-28 | 安徽金禾实业股份有限公司 | Byproduct SO in sucralose production 2 Of (2) |
-
2019
- 2019-07-25 CN CN201921177790.5U patent/CN210278686U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634071A (en) * | 2020-04-27 | 2021-11-12 | 张吉瑞 | Method for recycling chemical tail gas and treatment device thereof |
| CN113955723A (en) * | 2021-11-02 | 2022-01-21 | 杭州聚纬科技工程有限公司 | Rectification separation purification method and system for gas containing hydrogen chloride sulfur dioxide |
| CN115849308A (en) * | 2022-11-17 | 2023-03-28 | 安徽金禾实业股份有限公司 | Byproduct SO in sucralose production 2 Of (2) |
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