CN210973884U - Purification system of hydrogen sulfide gas - Google Patents
Purification system of hydrogen sulfide gas Download PDFInfo
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- CN210973884U CN210973884U CN201921321353.6U CN201921321353U CN210973884U CN 210973884 U CN210973884 U CN 210973884U CN 201921321353 U CN201921321353 U CN 201921321353U CN 210973884 U CN210973884 U CN 210973884U
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Abstract
The utility model relates to a hydrogen sulfide gas body purification technical field specifically is a hydrogen sulfide gas body's purification system, the purification system is including the one-level compressor arrangement, drying tower, the second grade compressor arrangement that set gradually, take off the light tower, take off heavy tower and azeotropic tower. The utility model discloses mainly used compresses, liquefies and purifies the hydrogen sulfide gas of about 75% -95% of the purity that contains a quantitative moisture and other impurity in the project of byproduct hydrogen sulfide gas, obtains content 99.99% liquid hydrogen sulfide, can improve the purity of hydrogen sulfide to reduce the energy consumption.
Description
Technical Field
The invention relates to the technical field of hydrogen sulfide gas purification, in particular to a system for purifying hydrogen sulfide gas.
Background
The waste gas produced in industrial production can be recycled, so that the quality of the surrounding air is protected, and the recycled waste gas can be utilized to change waste into valuable.
Among them, the byproduct hydrogen sulfide gas is common, and the pure hydrogen sulfide has wide application, and has wide application in fields such as chemical analysis, metal refining, various industrial reagents, and the like. High-purity hydrogen sulfide is a high value-added substance, and the prior art is difficult to obtain the high-purity hydrogen sulfide.
The prior purification technology mainly has the following technical problems:
1. at present, the industrial hydrogen sulfide gas is generally compressed by a diaphragm compressor or a reciprocating compressor, and the diaphragm compressor or the reciprocating compressor is adopted for compression, so that the equipment quantity is large, the investment is large, the energy consumption is high, the economical efficiency is poor, and the waste of materials and energy is caused;
2. the purification process of the hydrogen sulfide gas is simple, and the purification with higher purity cannot be realized;
3. the energy consumption of the hydrogen sulfide gas purification process is too high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system for purifying hydrogen sulfide gas, which is mainly used for compressing, liquefying and purifying hydrogen sulfide gas with the purity of about 75-95% and containing a certain amount of water and other impurities in a project of by-producing hydrogen sulfide gas to obtain liquid hydrogen sulfide with the content of 99.99%, so that the purity of the hydrogen sulfide can be improved, and the energy consumption can be reduced.
In order to solve the technical problems, the invention provides the following technical scheme:
a purification system of hydrogen sulfide gas comprises a primary compression device, a drying tower, a secondary compression device, a light component removal tower, a heavy component removal tower and an azeotropic tower which are sequentially arranged.
In the purification system, after two-stage compression and one-stage drying, the hydrogen sulfide with the purity up to 99.99 percent can be obtained through three-stage rectification treatment.
The first-stage compression device comprises water ring compressor sets which are connected in sequence.
The water ring compressor set is connected with a first condenser and a coalescer which are sequentially arranged, the first condenser adopts a low-temperature condensation mode, and the first condenser and the coalescer are used for preliminarily removing moisture in compressed gas.
The drying tower is internally provided with a molecular sieve drying agent, gas entering the molecular sieve drying tower is further dried, the two drying towers are arranged, one drying tower is used for drying, the other drying tower is used for regenerating, and the water content is reduced to be below 10 ppm.
The secondary compression device comprises a screw compressor unit and a first heat exchanger which are sequentially connected, secondary compression is carried out through the screw compressor unit, and the compressed hydrogen sulfide is cooled by the first heat exchanger and then becomes liquid to enter the lightness-removing tower.
The tower top of the light component removal tower is connected with a first group of coolers and then is respectively connected with a first heat exchanger and a first receiving tank, the first heat exchanger is connected with a light component output pipeline, the first receiving tank is connected with the light component removal tower, the tower bottom of the light component removal tower is connected with a heavy component removal tower, and the light component removal tower is used for removing light component impurities.
The tower top of the heavy component removal tower is connected with a second group of coolers and then connected with a second receiving tank, the second receiving tank is connected with the azeotropic tower, the tower bottom of the heavy component removal tower is connected with a heavy component output pipeline, and the heavy component removal tower is used for removing heavy component impurities.
The top of the azeotropic tower is connected with a third group of coolers and then is connected with a third receiving tank, the third receiving tank is connected with a product output pipeline, and the azeotropic tower is used for removing azeotropes.
The light component removing tower, the heavy component removing tower and the azeotropic tower are rectifying towers.
The specific process flow of the system is as follows: the crude hydrogen sulfide gas enters a water ring compressor through a buffer tank for primary compression, enters a first condenser and a coalescer for primary cooling and dewatering, then enters a molecular sieve drying tower for further drying, the water content is reduced to be below 10ppm, the hydrogen sulfide gas discharged from the molecular sieve drying tower enters a screw compressor for secondary compression, the compressed hydrogen sulfide is cooled by a cold exchanger and then becomes liquid, enters a light component removal tower, and light components are removed by controlling the temperature and reflux ratio of the top and the bottom of the tower; hydrogen sulfide at the tower bottom enters a de-heavy tower, and heavy components are removed by controlling the temperature and reflux ratio of the tower top and the tower bottom; hydrogen sulfide at the tower bottom enters the azeotropic tower again, and the azeotrope is removed by controlling the temperature and reflux ratio of the tower top and the tower bottom.
The invention has the following beneficial effects:
1. the invention adopts the first-stage water ring compressor and the second-stage screw compressor to compress the hydrogen sulfide gas, and compared with the diaphragm type and reciprocating type compressors used in the prior art, the invention realizes the same compression effect and can reduce the number of compression equipment and equipment investment.
2. The invention adds a low-temperature condenser and a coalescer between the first-stage water ring compressor and the second-stage screw compressor and then enters the molecular sieve drying equipment, which can remove 80 percent of water in advance, reduce the processing load of the molecular sieve drying equipment, and prolong the regeneration period and the service life of the molecular sieve.
3. The invention adopts rectification to remove impurities and purify, crude hydrogen sulfide enters a light component removing tower, a heavy component removing tower and an azeotrope removing tower in sequence, the compressed hydrogen sulfide liquid is rectified, and the impurities are removed by strictly controlling the temperature at the top and the bottom of the tower, so that the purity of the product can reach 99.99 percent. Compared with the existing purification technology, the method has the advantages of high product purity, low energy consumption and solvent-free operation.
4. The invention adopts rectification to remove impurities and purify, and exchanges cooling between light components at the top of the light component removal tower and crude hydrogen sulfide before entering the tower, thereby saving the consumption of cold water and reducing energy consumption.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the purification system of the present invention;
in the figure: 1. a water ring compressor unit; 2. a first condenser; 3. a coalescer; 4. a drying tower; 5. a screw compressor unit; 6. a first heat exchanger; 7. a light component removal tower; 81. a first receiving tank; 82. a second receiving tank; 83. a third receiving tank; 9. a de-weighting tower; 10. an azeotropic column; 11. a second condenser; 12. a third condenser; 13. a fourth condenser; 14. a fifth condenser; 15. a sixth condenser; 16. a light component output pipe; 17. a heavies output conduit; 18. a product output line.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b):
as shown in fig. 1, a system for purifying hydrogen sulfide gas includes a first-stage compression device, a drying tower 4, a second-stage compression device, a light component removal tower 7, a heavy component removal tower 8 and an azeotropic tower 10, which are sequentially arranged.
The first-stage compression device comprises a water ring compressor unit 1, a first condenser 2 and a coalescer 3 which are connected in sequence, wherein the first condenser 2 adopts a low-temperature condensation mode.
The drying tower 4 is internally provided with a molecular sieve drying agent, the gas entering the molecular sieve drying tower is further dried, the two drying towers 4 are arranged, one drying tower 4 is used for drying, the other drying tower 4 is used for regenerating, and the water content is reduced to be below 10 ppm.
The secondary compression device comprises a screw compressor unit 5 and a first heat exchanger 6 which are connected in sequence, secondary compression is carried out through the screw compressor unit 5, and the compressed hydrogen sulfide is cooled by the first heat exchanger 6 and then becomes liquid to enter a lightness-removing tower 7.
The tower top of the light component removal tower 7 is connected with a first group of coolers and then is respectively connected with a first heat exchanger 6 and a first receiving tank 8, the first group of heat exchangers comprises a second condenser 11 and a third condenser 12, the first heat exchanger 6 is connected with a light component output pipeline 16, a first receiving tank 81 is connected with the light component removal tower 7 and is used for reflux, the tower bottom of the light component removal tower 7 is connected with a heavy component removal tower 9, and the light component removal tower 7 is used for removing light component impurities.
The tower top of the heavy component removal tower 9 is connected with a second group of coolers and then is connected with a second receiving tank 82, the second group of coolers comprises a fourth condenser 13 and a fifth condenser 14, the second receiving tank 82 is connected with the azeotropic tower 10, the tower bottom of the heavy component removal tower 9 is connected with a heavy component output pipeline 17, and the heavy component removal tower 9 is used for removing heavy component impurities.
The top of the azeotropic tower 10 is connected with a third group of coolers and then is connected with a third receiving tank 83, the third group of coolers comprises a sixth condenser 15, the third receiving tank 83 is connected with a product output pipeline 18, and the azeotropic tower 10 is used for removing azeotropes.
The light component removing tower 7, the heavy component removing tower 9 and the azeotropic tower 10 are rectifying towers.
A purification process of hydrogen sulfide gas comprises the following steps: after the crude hydrogen sulfide gas with 0.05MPa content of about 95 percent enters a water ring compressor unit 1 for compression, the crude hydrogen sulfide gas is cooled to about 10 ℃ through a first condenser 2 and a coalescer 3 to remove most of water, and then the crude hydrogen sulfide gas enters a molecular sieve drying tower 4 for drying, so that the water content is reduced to below 10ppm, and the drying agent of the molecular sieve drying tower 4 is a 3A molecular sieve. The hydrogen sulfide gas from the molecular sieve drying tower 4 enters a screw compressor 5 for compression and then enters a first heat exchanger 6 for cooling to obtain hydrogen sulfide liquid with the pressure of 2.6MPa (G) and the temperature of less than or equal to 40 ℃.
Hydrogen sulfide liquid enters a lightness-removing tower 7, the tower top is controlled to be 2.5MPa or less than 35 ℃, the tower bottom is controlled to be 2.6MPa or less than 40 ℃, and light components removed from the tower top mainly comprise C3H8、C2H4After the heat is exchanged to-10 ℃ by the two-stage condenser, the cold energy is exchanged with the first heat exchanger 6 before entering the tower and then is discharged out of the system; the hydrogen sulfide liquid at the tower bottom enters a de-heavy tower 9, the tower top is controlled to be 2.4MPa and less than or equal to 35 ℃, the tower bottom is controlled to be 2.5MPa and less than or equal to 40 ℃, and heavy components at the tower bottom mainly comprise C5H12、C6H14、C6H6After the hydrogen sulfide is discharged out of the system and the temperature of the hydrogen sulfide at the tower top is changed to 33 ℃ by a two-stage condenser, the hydrogen sulfide enters an azeotropic tower 10; the top of the azeotropic tower 10 is controlled to be 0.8MPa or less-5 ℃, the bottom of the azeotropic tower is controlled to be 0.8MPa or less-3 ℃, and the azeotrope is removed from the top of the azeotropic tower, mainly comprising CO2、H2、CH4、C2H6、C3H8To obtain the hydrogen sulfide product with the purity of 99.99 percent.
Claims (9)
1. The utility model provides a purification system of hydrogen sulfide gas, its characterized in that, is including the one-level compressor arrangement, drying tower (4), second grade compressor arrangement, light tower (7), heavy tower (9) and azeotropic tower (10) of taking off that set gradually, the one-level compressor arrangement is including the water ring compressor unit (1) that connects gradually, second grade compressor arrangement includes screw compressor unit (5).
2. The purification system of hydrogen sulfide gas according to claim 1, wherein the water ring compressor unit (1) is connected with a first condenser (2) and a coalescer (3) which are arranged in sequence.
3. The purification system of hydrogen sulfide gas according to claim 1, wherein a molecular sieve desiccant is provided in the drying tower (4).
4. The purification system of hydrogen sulfide gas according to claim 1 or 3, wherein two drying towers (4) are provided.
5. The purification system of hydrogen sulfide gas according to claim 1, wherein the secondary compression device comprises a first heat exchanger (6).
6. The system for purifying hydrogen sulfide gas as claimed in claim 5, wherein the top of the light component removal tower (7) is connected to a first group of coolers and then is connected to a first heat exchanger (6) and a first receiving tank (81), the first heat exchanger (6) is connected to the light component output pipeline (16), the first receiving tank (81) is connected to the light component removal tower (7), and the bottom of the light component removal tower (7) is connected to the heavy component removal tower (9).
7. The purification system of hydrogen sulfide gas as claimed in claim 1, wherein the top of the de-heavy tower (9) is connected with a second group of coolers and then connected with a second receiving tank (82), the second receiving tank (82) is connected with the azeotropic tower (10), and the bottom of the de-heavy tower (9) is connected with a heavy component output pipeline (17).
8. The system for purifying hydrogen sulfide gas as claimed in claim 1, wherein the top of the azeotropic column (10) is connected to a third group of coolers and then connected to a third receiving tank (83), and the third receiving tank (83) is connected to the product outlet line (18).
9. The system for purifying hydrogen sulfide gas according to claim 1, 6, 7, or 8, wherein the light component removal column (7), the heavy component removal column (9), and the azeotropic column (10) are rectification columns.
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| CN201921321353.6U CN210973884U (en) | 2019-08-14 | 2019-08-14 | Purification system of hydrogen sulfide gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342471A (en) * | 2019-08-14 | 2019-10-18 | 山东中天科技工程有限公司 | The purification system and purifying technique of hydrogen sulfide gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110342471A (en) * | 2019-08-14 | 2019-10-18 | 山东中天科技工程有限公司 | The purification system and purifying technique of hydrogen sulfide gas |
| CN110342471B (en) * | 2019-08-14 | 2024-09-06 | 山东中天科技工程有限公司 | Purification system and purification process of hydrogen sulfide gas |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Purification system of hydrogen sulfide gas Effective date of registration: 20230224 Granted publication date: 20200710 Pledgee: Zibo Branch of China Post Savings Bank Co.,Ltd. Pledgor: SHANDONG ZHONGTIAN TECHNOLOGY & ENGINEERING Co.,Ltd. Registration number: Y2023980033385 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |