CN221155997U - Device for removing methanol in purge gas - Google Patents
Device for removing methanol in purge gas Download PDFInfo
- Publication number
- CN221155997U CN221155997U CN202322904862.4U CN202322904862U CN221155997U CN 221155997 U CN221155997 U CN 221155997U CN 202322904862 U CN202322904862 U CN 202322904862U CN 221155997 U CN221155997 U CN 221155997U
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- China
- Prior art keywords
- methanol
- pipe
- condensation
- condensation separator
- separator
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 343
- 238000010926 purge Methods 0.000 title claims abstract description 21
- 238000009833 condensation Methods 0.000 claims abstract description 97
- 230000005494 condensation Effects 0.000 claims abstract description 97
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000011084 recovery Methods 0.000 claims abstract description 18
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 23
- 238000004821 distillation Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 239000008246 gaseous mixture Substances 0.000 claims 1
- 229910021529 ammonia Inorganic materials 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 9
- 239000012528 membrane Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 231100000572 poisoning Toxicity 0.000 abstract description 3
- 230000000607 poisoning effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to the technical field of methanol removing devices, and discloses a device for removing methanol in purge gas, which solves the problem of membrane poisoning in membrane separation caused by the purge gas entering a synthetic ammonia company, and comprises a mixed gas inlet pipe, a first condensation separator, a second condensation separator, a third condensation separator, a low-temperature distillation tower, low-temperature methanol washing equipment, a methanol rectifying tower, a methanol condenser and a methanol recovery tank, wherein the mixed gas inlet pipe is fixedly connected to the top end of the first condensation separator; the methanol removing device can improve the methanol removing effect and can recover methanol.
Description
Technical Field
The utility model relates to the technical field of methanol removal devices, in particular to a device for removing methanol in purge gas.
Background
In methanol production systems, there are many side reactions due to methanol synthesis, which generate a large amount of inert gas and accumulate in the system, affecting the normal operation of the methanol synthesis conditions, and the exhaust gas, called purge gas, must be continuously discharged. The main components of the purge gas for methanol synthesis are inert gases such as H 2、CO、CO2、H2O、CH3OH、NH3、CH4, wherein the volume percentage of H 2 and CH 4 is about 80 percent. How to recycle the effective components of the methanol purge gas and realize the recycling of resources becomes an important problem of energy conservation and consumption reduction of enterprises, the existing method is to send the purge gas into a synthetic ammonia company for treatment, and the methanol in the purge gas must be removed because the purge gas is sent to the synthetic ammonia company to enter membrane separation and the methanol can cause membrane poisoning of the membrane separation.
Disclosure of Invention
In view of the above-mentioned shortcomings in the prior art, the present utility model provides a device for removing methanol from purge gas, which can separate water and remove methanol from purge gas.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a remove device of methyl alcohol in purge gas, includes mixed gas intake pipe, first condensation separator, second condensation separator, third condensation separator, low temperature distillation column, low temperature methyl alcohol washes equipment, methyl alcohol rectifying column, methyl alcohol condenser and methyl alcohol recovery tank, mixed gas intake pipe fixed connection is in the top of first condensation separator, be connected through honeycomb duct between first condensation separator and the second condensation separator, be connected through honeycomb duct between second condensation separator and the third condensation separator, the bottom of first condensation separator, second condensation separator and third condensation separator is all fixed to be provided with the methyl alcohol discharge pipe, the methyl alcohol discharge pipe passes through the methyl alcohol mixing tube with the low temperature distillation column and is connected, one side of third condensation separator is provided with the mixed gas discharge pipe, the top of low temperature distillation column is provided with the ammonia discharge branch pipe of being connected with the mixed gas discharge pipe, low temperature distillation column is connected through pipe first with low temperature methyl alcohol washing equipment, low temperature methyl alcohol washes equipment and is connected through guide duct second with the methyl alcohol rectifying column, methyl alcohol rectifying column and methyl alcohol recovery tank pass through the methyl alcohol pipe connection, methyl alcohol condenser is connected on the methyl alcohol recovery pipe.
Preferably, the ammonia gas discharge branch pipe is provided with a one-way air valve, and the top end of the low-temperature methanol washing device is provided with a impurity removing pipe.
Preferably, the first condensation separator, the second condensation separator and the third condensation separator are composed of a condensation tank body, a cold medium inlet pipe, a cold medium outlet pipe and a plurality of condensation components, wherein the cold medium inlet pipe and the cold medium outlet pipe are respectively and fixedly connected to two sides of the condensation tank body, and the condensation components are fixedly connected to the inside of the condensation tank body and are fixedly connected with the cold medium inlet pipe and the cold medium outlet pipe.
Preferably, the condensing assembly is composed of a condensing coil, a porous condensing disc, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are respectively and fixedly connected to two ends of the condensing coil, the other ends of the liquid inlet pipe and the liquid outlet pipe are respectively and fixedly connected with a cold medium inlet pipe and a cold medium outlet pipe, and the condensing coil is inserted into the porous condensing disc and is fixedly connected with the porous condensing disc.
Compared with the prior art, the utility model has the beneficial effects that:
(1) In operation, the first condensation separator, the second condensation separator and the third condensation separator which are formed by the condensation tank body, the cold medium inlet pipe, the cold medium outlet pipe and the plurality of condensation components are arranged, so that the separation of water vapor can be realized, the water vapor content and the methanol content can be effectively reduced through three times of separation, and the membrane poisoning of membrane separation caused by methanol is prevented;
(2) Through being provided with cryogenic distillation tower, cryogenic methanol washing equipment, methanol rectifying column, methanol condenser and methanol recovery jar, can realize taking off the ammonia in the methanol completely, can get rid of the mixed gas impurity in the methanol simultaneously, realize retrieving the methanol.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.
In the drawings:
FIG. 1 is a schematic view showing the structure of an apparatus for removing methanol from purge gas according to the present utility model;
FIG. 2 is a schematic view of a first condensate separator according to the present utility model;
FIG. 3 is a schematic view of a condensing unit according to the present utility model;
In the figure: 1. a mixed gas inlet pipe; 2. a first condensate separator; 3. a second condensate separator; 4. a third condensate separator; 5. a cryogenic distillation column; 6. low temperature methanol washing equipment; 7. a methanol rectifying tower; 8. a methanol condenser; 9. a methanol recovery tank; 10. a honeycomb duct I; 11. a honeycomb duct II; 12. a methanol discharge pipe; 13. a methanol mixing tube; 14. a mixed gas discharge pipe; 15. an ammonia gas discharge branch pipe; 16. a first conduction pipe; 17. a second conduction pipe; 18. a methanol recovery pipe; 19. a one-way air valve; 20. a impurity removing pipe; 21. a condensing tank; 22. a cold medium inlet pipe; 23. a cold medium outlet pipe; 24. a condensing assembly; 25. a condensing coil; 26. a porous condensing plate; 27. a liquid inlet pipe; 28. and a liquid discharge pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a device for removing methanol in purge gas, which comprises a mixed gas inlet pipe 1, a first condensation separator 2, a second condensation separator 3, a third condensation separator 4, a low-temperature distillation tower 5, low-temperature methanol washing equipment 6, a methanol rectifying tower 7, a methanol condenser 8 and a methanol recovery tank 9, wherein the mixed gas inlet pipe 1 is fixedly connected to the top end of the first condensation separator 2, the first condensation separator 2 is connected with the second condensation separator 3 through a first flow guide pipe 10, the second condensation separator 3 is connected with the third condensation separator 4 through a second flow guide pipe 11, the bottoms of the first condensation separator 2, the second condensation separator 3 and the third condensation separator 4 are fixedly provided with a methanol discharge pipe 12, the methanol discharge pipe 12 is connected with the low-temperature distillation tower 5 through a methanol mixing pipe 13, one side of the third condensation separator 4 is provided with a mixed gas discharge branch pipe 14, the top end of the low-temperature distillation tower 5 is provided with an ammonia gas discharge branch pipe 15 connected with the mixed gas discharge pipe 14, the low-temperature distillation tower 5 is connected with the low-temperature methanol washing equipment 6 through a first flow guide pipe 16, the bottom end of the low-temperature distillation tower 3 is connected with the methanol recovery tank 7 through a second flow guide pipe 18, the methanol discharge pipe 17 is connected with the methanol recovery tank 18 through the low-temperature distillation tower 7 through a second flow guide pipe 17, and the top end of the recovery pipe 18 is connected with the methanol recovery tank 9 through the methanol discharge pipe 18;
The mixed gas enters the first condensation separator 2 through the mixed gas inlet pipe 1, the methanol gas is condensed to form liquid, the boiling point of the other gas is far lower than that of the methanol, so that the methane and the hydrogen can not form liquid, the mixed gas enters the second condensation separator 3 along the first guide pipe 10, secondary condensation is realized through the second condensation separator 3, then the third condensation separator 4 is realized, liquid methanol formed after condensation is discharged into the low-temperature distillation tower 5 through the methanol discharge pipe 12, the methanol is subjected to low-temperature distillation through the low-temperature distillation tower 5, ammonia mixed in the methanol is discharged, the ammonia is discharged into the mixed gas discharge pipe 14 through the ammonia discharge branch pipe 15, the methanol enters the low-temperature methanol washing equipment 6 through the first guide pipe 16, impurity removal operation is realized, the methanol enters the methanol rectification tower 7 along the second guide pipe 17, rectification operation on the methanol is realized, the methanol is finally condensed through the methanol condenser 8, and finally the recovered pure methanol is discharged into the methanol recovery tank 9;
As shown in fig. 1 to 3, each of the first condensation separator 2, the second condensation separator 3 and the third condensation separator 4 is composed of a condensation tank 21, a cold medium inlet pipe 22, a cold medium outlet pipe 23 and a plurality of condensation components 24, the cold medium inlet pipe 22 and the cold medium outlet pipe 23 are respectively and fixedly connected to two sides of the condensation tank 21, the condensation components 24 are fixedly connected to the interior of the condensation tank 21 and fixedly connected with the cold medium inlet pipe 22 and the cold medium outlet pipe 23, the condensation components 24 are composed of a condensation coil 25, a porous condensation disc 26, a liquid inlet pipe 27 and a liquid outlet pipe 28, the liquid inlet pipe 27 and the liquid outlet pipe 28 are respectively and fixedly connected to two ends of the condensation coil 25, the other ends of the liquid inlet pipe 27 and the liquid outlet pipe 28 are respectively and fixedly connected with the cold medium inlet pipe 22 and the cold medium outlet pipe 23, and the condensation coil 25 is inserted into the porous condensation disc 26 and fixedly connected with the porous condensation disc 26;
When the first condensation separator 2, the second condensation separator 3 and the third condensation separator 4 work, mixed gas enters the porous condensation plate 26, so that the contact area between the mixed gas and the porous condensation plate 26 can be increased, the condensation effect is improved, and the porous condensation plate 26 is connected with the condensation coil 25, so that the porous condensation plate 26 is in a low-temperature state and has a uniform temperature, and the condensation efficiency is improved.
In operation, through the arrangement of the first condensation separator, the second condensation separator and the third condensation separator which are formed by the condensation tank body, the cold medium inlet pipe, the cold medium outlet pipe and the plurality of condensation components, the separation of methanol and water vapor in the mixed gas can be realized by utilizing the difference of boiling points, the removal effect of the methanol is effectively improved through three times of separation, and no methanol in purge gas is ensured; through being provided with cryogenic distillation tower, cryogenic methanol washing equipment, methyl alcohol rectifying column, methyl alcohol condenser and methyl alcohol recovery tank, can realize discharging the inside a small amount of ammonia of methyl alcohol after the separation, can get rid of the mixed gas impurity in the methyl alcohol simultaneously, realize retrieving the methyl alcohol.
The foregoing has described in detail the technical solutions provided by the embodiments of the present utility model, and specific examples have been applied to illustrate the principles and implementations of the embodiments of the present utility model, where the above description of the embodiments is only suitable for helping to understand the principles of the embodiments of the present utility model; meanwhile, as for those skilled in the art, according to the embodiments of the present utility model, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present utility model.
Claims (4)
1. The utility model provides a remove device of methanol in purge gas, includes gaseous mixture intake pipe (1), first condensation separator (2), second condensation separator (3), third condensation separator (4), cryogenic distillation tower (5), low temperature methanol washing equipment (6), methanol rectifying column (7), methanol condenser (8) and methanol recovery jar (9), its characterized in that: the mixed gas air inlet pipe (1) is fixedly connected to the top end of the first condensation separator (2), the first condensation separator (2) is connected with the second condensation separator (3) through a first guide pipe (10), the second condensation separator (3) is connected with the third condensation separator (4) through a second guide pipe (11), the bottom ends of the first condensation separator (2), the second condensation separator (3) and the third condensation separator (4) are fixedly provided with a methanol discharge pipe (12), the methanol discharge pipe (12) is connected with the low-temperature distillation column (5) through a methanol mixing pipe (13), one side of the third condensation separator (4) is provided with a mixed gas discharge pipe (14), the top end of the low-temperature distillation column (5) is provided with an ammonia gas discharge branch pipe (15) connected with the mixed gas discharge pipe (14), the low-temperature distillation column (5) is connected with the low-temperature methanol washing equipment (6) through a first guide pipe (16), the low-temperature methanol washing equipment (6) is connected with the methanol distillation column (7) through a second guide pipe (17), and the methanol distillation column (7) is connected with the methanol distillation column (9) through a methanol recovery pipe (18), and the methanol recovery tank (8) is connected with the recovery pipe (18).
2. The apparatus for removing methanol from purge gas according to claim 1, wherein: the ammonia gas discharge branch pipe (15) is provided with a one-way air valve (19), and the top end of the low-temperature methanol washing device (6) is provided with a impurity removal pipe (20).
3. The apparatus for removing methanol from purge gas according to claim 1, wherein: the first condensation separator (2), the second condensation separator (3) and the third condensation separator (4) are composed of a condensation tank body (21), a cold medium inlet pipe (22), a cold medium outlet pipe (23) and a plurality of condensation components (24), wherein the cold medium inlet pipe (22) and the cold medium outlet pipe (23) are respectively and fixedly connected to two sides of the condensation tank body (21), and the condensation components (24) are fixedly connected to the inside of the condensation tank body (21) and are fixedly connected with the cold medium inlet pipe (22) and the cold medium outlet pipe (23).
4. A device for removing methanol from purge gas according to claim 3, wherein: the condensing assembly (24) is composed of a condensing coil (25), a porous condensing disc (26), a liquid inlet pipe (27) and a liquid discharge pipe (28), wherein the liquid inlet pipe (27) and the liquid discharge pipe (28) are respectively and fixedly connected to two ends of the condensing coil (25), the other ends of the liquid inlet pipe (27) and the liquid discharge pipe (28) are respectively and fixedly connected with a cold medium inlet pipe (22) and a cold medium outlet pipe (23), and the condensing coil (25) is inserted into the porous condensing disc (26) and is fixedly connected with the porous condensing disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322904862.4U CN221155997U (en) | 2023-10-30 | 2023-10-30 | Device for removing methanol in purge gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322904862.4U CN221155997U (en) | 2023-10-30 | 2023-10-30 | Device for removing methanol in purge gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221155997U true CN221155997U (en) | 2024-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322904862.4U Active CN221155997U (en) | 2023-10-30 | 2023-10-30 | Device for removing methanol in purge gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221155997U (en) |
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2023
- 2023-10-30 CN CN202322904862.4U patent/CN221155997U/en active Active
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| GR01 | Patent grant |