CN221267637U - Dimethyl sulfide oxidation tail gas absorption system - Google Patents
Dimethyl sulfide oxidation tail gas absorption system Download PDFInfo
- Publication number
- CN221267637U CN221267637U CN202323186436.8U CN202323186436U CN221267637U CN 221267637 U CN221267637 U CN 221267637U CN 202323186436 U CN202323186436 U CN 202323186436U CN 221267637 U CN221267637 U CN 221267637U
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- CN
- China
- Prior art keywords
- condenser
- tail gas
- alkaline washing
- stage
- washing tower
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- QMMFVYPAHWMCMS-UHFFFAOYSA-N Dimethyl sulfide Chemical compound CSC QMMFVYPAHWMCMS-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 230000003647 oxidation Effects 0.000 title claims abstract description 19
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 19
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003518 caustics Substances 0.000 claims description 10
- 239000007791 liquid phase Substances 0.000 claims description 10
- 239000012071 phase Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 abstract description 12
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 235000010288 sodium nitrite Nutrition 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model belongs to the technical field of tail gas treatment in dimethyl sulfoxide production, and particularly relates to a dimethyl sulfide oxidation tail gas absorption system. The system comprises a circulating water condenser, wherein the circulating water condenser is connected with a gas-liquid separator, a gas phase outlet of the gas-liquid separator is connected with a first-stage condenser, the first-stage condenser is connected with a second-stage condenser, the second-stage condenser is connected with a third-stage condenser, the third-stage condenser is connected with the middle lower part of a first-stage alkaline washing tower, a gas phase outlet of the first-stage alkaline washing tower is connected with the middle lower part of the second-stage alkaline washing tower, and a tail gas outlet is arranged at the top of the second-stage alkaline washing tower. The utility model has the beneficial effects that: the system has low requirements on equipment, is easy to industrialize, has high continuity and automation degree, and the NO x content in the gas absorbed by the system is lower than 30 mg/m 3, and the sodium nitrite content generated in the secondary alkaline tower is lower than 0.1%.
Description
Technical Field
The utility model belongs to the technical field of tail gas treatment in dimethyl sulfoxide production, and particularly relates to a dimethyl sulfide oxidation tail gas absorption system.
Background
Dimethyl sulfoxide (DMSO) is a sulfur-containing organic compound, has the characteristics of high polarity, high boiling point, good thermal stability, aprotic property and water miscibility, can be dissolved in most organic matters such as ethanol, benzene and the like, is one of the strongest solvents in organic solvents, and is known as a universal solvent. At present, dimethyl sulfoxide is mainly prepared and produced by catalytic oxidation of dimethyl sulfide, and mainly comprises a nitric acid oxidation method, a nitrogen dioxide oxidation method and a hydrogen peroxide oxidation method, wherein the nitric acid oxidation method has large corrosion to equipment, the hydrogen peroxide method has high cost, and the most commonly used method is the nitrogen dioxide oxidation method at present. When the custom-made reactor is used for oxidation, the custom-made reactor is greatly changed with the traditional oxidation tower, gas-liquid two phases are extracted from the reactor together, and a tail gas system which is used conventionally is not applicable any more.
Disclosure of Invention
Aiming at the technical problem that the traditional tail gas system is not applicable any more after a new customized reactor is used, the utility model provides a dimethyl sulfide oxidation tail gas absorption system, which has the technical scheme that: the device comprises a circulating water condenser, wherein the circulating water condenser is connected with a gas-liquid separator, a gas phase outlet of the gas-liquid separator is connected with a first-stage condenser, the first-stage condenser is connected with a second-stage condenser, the second-stage condenser is connected with a third-stage condenser, the third-stage condenser is connected with the middle lower part of a first-stage alkaline washing tower, a gas phase outlet of the first-stage alkaline washing tower is connected with the middle lower part of the second-stage alkaline washing tower, and a tail gas outlet is arranged at the top of the second-stage alkaline washing tower.
The bottom liquid phase outlet of the gas-liquid separator is connected with the storage tank.
The liquid phase outlet at the bottom of the first-stage alkaline washing tower is connected with a first circulating pump, and the first circulating pump is connected with the middle upper part of the first-stage alkaline washing tower.
The liquid phase outlet at the bottom of the secondary alkaline washing tower is connected with a second circulating pump, and the second circulating pump is connected with the middle upper part of the secondary alkaline washing tower.
The middle lower part of the secondary alkaline washing tower is provided with an air supplementing pipeline.
In the preferable scheme, the water inlet temperature of the primary condenser is 18-22 ℃, and the water inlet temperatures of the secondary condenser and the tertiary condenser are 5-8 ℃.
In the preferred scheme, the concentration of liquid alkali in the primary alkaline washing tower is 8-12%, and the concentration of liquid alkali in the secondary alkaline washing tower is 28-32%.
In the preferable scheme, the liquid-gas ratio of the primary alkaline washing tower to the secondary alkaline washing tower is 1-3L/m 3, and the air tower gas flow rate is 0.1-0.9 m/s.
The utility model has the beneficial effects that:
The system has low requirements on equipment, is easy to industrialize, has high continuity and automation degree, and the NO x content in the gas absorbed by the system is lower than 30mg/m 3, and the sodium nitrite content generated in the secondary alkaline tower is lower than 0.1%.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
In the figure: the device comprises a circulating water condenser 1, a gas-liquid separator 2, a storage tank 3, a first-stage condenser 4, a second-stage condenser 5, a third-stage condenser 6, a first-stage caustic wash tower 7, a first circulating pump 8, a second-stage caustic wash tower 9, a second circulating pump 10, an air supplementing pipeline 11 and a tail gas outlet 12.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the specific embodiments.
Example 1
The utility model provides a dimethyl sulfide oxidation tail gas absorption system, including circulating water condenser 1, circulating water condenser 1 links to each other with gas-liquid separator 2, and the gaseous phase export of gas-liquid separator 2 links to each other with first order condenser 4, and first order condenser 4 links to each other with second order condenser 5, and second order condenser 5 links to each other with tertiary condenser 6, and tertiary condenser 6 links to each other with the well lower part of first order caustic wash tower 7, and the gaseous phase export of first order caustic wash tower 7 links to each other with the well lower part of second order caustic wash tower 9, and the top of second order caustic wash tower 9 sets up tail gas outlet 12.
The bottom liquid phase outlet of the gas-liquid separator 2 is connected with a storage tank 3.
The liquid phase outlet at the bottom of the primary alkaline washing tower 7 is connected with a first circulating pump 8, and the first circulating pump 8 is connected with the middle upper part of the primary alkaline washing tower 7.
The liquid phase outlet at the bottom of the secondary alkaline washing tower 9 is connected with a second circulating pump 10, and the second circulating pump 10 is connected with the middle upper part of the secondary alkaline washing tower 9.
The middle lower part of the secondary alkaline washing tower 9 is provided with an air supplementing pipeline 11.
Further, the inlet water temperature of the primary condenser is 20 ℃, and the inlet water temperatures of the secondary condenser and the tertiary condenser are 7 ℃.
Further, the concentration of liquid alkali in the primary alkaline washing tower is 10%, and the concentration of liquid alkali in the secondary alkaline washing tower is 30%.
Further, the liquid-gas ratio of the primary alkaline washing tower to the secondary alkaline washing tower is 1-3L/m 3, and the air tower gas flow rate is 0.1-0.9 m/s.
Example 2
The system of example 1 was used and operated as follows: dimethyl sulfoxide (crude product) and nitric oxide generated after the reaction of dimethyl sulfide and nitric oxide pass through a custom reactor, are cooled to about 40 ℃ by a circulating water heat exchanger 1, then pass through a gas-liquid separator 2, a liquid phase enters a storage tank 3, organic matters in gas are condensed by a first-stage condenser 4, a second-stage condenser 5 and a third-stage condenser 6, the condensed gas enters a first-stage alkaline washing tower 7, organic matters which cannot be condensed in the gas and a small amount of nitrogen dioxide are washed and absorbed by low-concentration liquid alkali, the circulating spraying is carried out by a first circulating pump 8, the washed gas enters a second-stage alkaline washing tower 9, air is supplemented by an air supplementing pipeline 11 according to the feeding amount, the nitric oxide in the gas is converted into nitrogen dioxide, then the nitrogen dioxide is absorbed by high-concentration liquid alkali, and the absorbed gas is discharged into the atmosphere after being checked to be qualified, and the checking result is shown in a table 1.
Table 1 tail gas test results
。
Claims (5)
1. The utility model provides a dimethyl sulfide oxidation tail gas absorption system, a serial communication port, including circulating water condenser (1), circulating water condenser (1) links to each other with vapour and liquid separator (2), vapour phase export and the one-level condenser (4) of vapour and liquid separator (2) link to each other, one-level condenser (4) link to each other with second grade condenser (5), second grade condenser (5) link to each other with tertiary condenser (6), tertiary condenser (6) link to each other with the well lower part of one-level caustic wash tower (7), the vapour phase export of one-level caustic wash tower (7) links to each other with the well lower part of second grade caustic wash tower (9), the top of second grade caustic wash tower (9) sets up tail gas outlet (12).
2. The dimethyl sulfide oxidation tail gas absorption system according to claim 1, wherein a bottom liquid phase outlet of the gas-liquid separator (2) is connected with the storage tank (3).
3. The dimethyl sulfide oxidation tail gas absorption system according to claim 1, wherein a bottom liquid phase outlet of the primary alkaline washing tower (7) is connected with a first circulating pump (8), and the first circulating pump (8) is connected with the middle upper part of the primary alkaline washing tower (7).
4. The dimethyl sulfide oxidation tail gas absorption system according to claim 1, wherein a bottom liquid phase outlet of the secondary alkaline washing tower (9) is connected with a second circulating pump (10), and the second circulating pump (10) is connected with the middle upper part of the secondary alkaline washing tower (9).
5. The dimethyl sulfide oxidation tail gas absorption system according to claim 1, wherein an air supplementing pipeline (11) is arranged at the middle lower part of the secondary alkaline washing tower (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323186436.8U CN221267637U (en) | 2023-11-24 | 2023-11-24 | Dimethyl sulfide oxidation tail gas absorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323186436.8U CN221267637U (en) | 2023-11-24 | 2023-11-24 | Dimethyl sulfide oxidation tail gas absorption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221267637U true CN221267637U (en) | 2024-07-05 |
Family
ID=91691296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323186436.8U Active CN221267637U (en) | 2023-11-24 | 2023-11-24 | Dimethyl sulfide oxidation tail gas absorption system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221267637U (en) |
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2023
- 2023-11-24 CN CN202323186436.8U patent/CN221267637U/en active Active
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