CN220918659U - Washing system for reducing methanol content in low-temperature methanol washing tail gas - Google Patents
Washing system for reducing methanol content in low-temperature methanol washing tail gas Download PDFInfo
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- CN220918659U CN220918659U CN202322656271.XU CN202322656271U CN220918659U CN 220918659 U CN220918659 U CN 220918659U CN 202322656271 U CN202322656271 U CN 202322656271U CN 220918659 U CN220918659 U CN 220918659U
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 379
- 238000005406 washing Methods 0.000 title claims abstract description 182
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 154
- 239000002351 wastewater Substances 0.000 claims abstract description 70
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 238000004868 gas analysis Methods 0.000 claims abstract description 16
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims description 20
- 238000005201 scrubbing Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 177
- 230000005540 biological transmission Effects 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- Gas Separation By Absorption (AREA)
Abstract
The utility model belongs to the technical field of tail gas washing of a low-temperature methanol washing process, and particularly relates to a washing system for reducing the methanol content in low-temperature methanol washing tail gas, which comprises a tail gas washing tower and a methanol/water separation tower, wherein a desalted water inlet is arranged at the top of the tail gas washing tower and is communicated with a desalted water system; the bottom of the tail gas washing tower is provided with a tail gas inlet and a waste water discharge port, and the tail gas inlet is communicated with the tail gas analysis tower; the wastewater discharge port is communicated with the methanol/water separation tower, a desalted water heat exchange unit is arranged between the tail gas washing tower and the methanol/water separation tower, and the desalted water heat exchange unit is used for exchanging heat between wastewater and desalted water. According to the utility model, the desalted water heat exchanger is additionally arranged between the tail gas washing tower and the methanol/water separation tower, the low-temperature wastewater discharged from the tail gas washing tower is used for exchanging heat with the desalted water, the temperature of the desalted water is reduced, the washing effect of the desalted water on methanol in the tail gas is improved, the discharged tail gas is ensured to reach the standard, and the problem that VOCs in the tail gas discharged by washing with low-temperature methanol exceeds the standard is solved.
Description
Technical Field
The utility model belongs to the technical field of low-temperature methanol washing process tail gas washing, and particularly relates to a washing system for reducing the methanol content in low-temperature methanol washing tail gas.
Background
The low-temperature methanol washing process takes cold methanol as an absorption solvent, and removes acid gas in raw material gas by utilizing the excellent characteristic of extremely high solubility of the methanol to the acid gas at low temperature. In the operation process of the low-temperature methanol washing device, the raw material gas enters the low-temperature methanol washing device, CO 2、H2 S, COS and the like in the raw material gas are removed through absorption, and finally tail gas with qualified acid gas content is obtained at the upper part of a desulfurization decarbonization-absorption tower (tail gas analysis tower), and the tail gas contains mixed gas of CO 2、N2 and CO as main components and contains a small amount of methanol. Although the methanol content in the tail gas is small, the tail gas can pollute the environment along with the tail gas emission, and simultaneously, the material loss is caused.
In order to reduce the emission of methanol in the tail gas and meet the environmental protection requirement, a tail gas washing tower is arranged in a process system, and the low-temperature methanol washing tail gas washing device and the process method thereof, as provided in patent 2016108221389, comprise a tail gas washing tower, a methanol/water separation tower, a heat exchanger, a methanol stripping tower and a vent cylinder which are connected through pipelines; the tail gas water scrubber is respectively connected with a desalted water source and a tail gas source containing methanol, the tail gas source containing methanol enters the tail gas water scrubber to be in countercurrent contact with desalted water for washing, after washing, methanol in the tail gas is absorbed by the desalted water, the desalted water absorbing the methanol is sent into the methanol/water separator, the methanol/water separator separates the methanol from wastewater, the methanol returns to the methanol thermal regeneration system, and the wastewater is sent outwards, so that recovery of the methanol in the tail gas is realized.
However, in production practice, the desalted water temperature of the desalted water system is about 50 degrees, so that the washing effect of the desalted water with too high temperature on methanol is poor, and the content of methanol in the tail gas discharged after the desalted water is washed is far higher than a design value (less than 50mg/Nm 3), so that the environment-friendly discharge requirement of VOCs in the discharged tail gas can not be met. Therefore, the temperature of desalted water needs to be reduced, the purpose of reducing the content of methanol in the low-temperature methanol washing tail gas is achieved, and the environmental protection requirement of tail gas emission is met.
Disclosure of utility model
The utility model aims to provide a washing system for reducing the methanol content in low-temperature methanol washing tail gas, so as to solve the problems that the washing effect on methanol is poor due to the fact that the desalted water is too high in temperature and the environment-friendly emission requirement of VOCs in the tail gas cannot be met.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The washing system for reducing the methanol content in the low-temperature methanol washing tail gas comprises a tail gas washing tower and a methanol/water separation tower, wherein a desalted water inlet and an emptying pipeline are arranged at the top of the tail gas washing tower, the desalted water inlet is communicated with the desalted water system, and the desalted water inlet and the emptying pipeline are arranged in parallel;
The bottom of the tail gas washing tower is provided with a tail gas inlet and a waste water discharge port, and the tail gas inlet is communicated with the tail gas analysis tower; a desalted water heat exchange unit is arranged between the tail gas washing tower and the methanol/water separation tower, the wastewater discharge port is communicated with the methanol/water separation tower through the desalted water heat exchange unit, and the desalted water heat exchange unit is used for exchanging heat between wastewater and desalted water.
Further, the desalted water heat exchange unit is a tube-in-tube heat exchanger.
Further, a tube side inlet of the tube nest heat exchanger is communicated with a waste water discharge port of the tail gas washing tower, and a tube side outlet of the tube nest heat exchanger is communicated with the methanol/water separation tower; and a shell side inlet of the shell-side heat exchanger is communicated with a desalted water system, and a shell side outlet of the shell-side heat exchanger is communicated with a desalted water inlet of the tail gas washing tower.
Further, a desalted water regulating valve is arranged on a pipeline of the desalted water entering the tail gas washing tower, a waste water regulating valve is arranged between the methanol/water separation tower and the desalted water heat exchange unit, and a waste water pump is arranged between the tail gas washing tower and the desalted water heat exchange unit.
Further, the device also comprises a remote DCS control unit, wherein a liquid level detection device is arranged in the tail gas washing tower and is connected with the remote DCS control unit; the remote DCS control unit is electrically connected with the desalted water regulating valve, the remote DCS control unit is electrically connected with the wastewater regulating valve, and the remote DCS control unit is electrically connected with the wastewater pump.
Further, set up the blow-down section of thick bamboo on the evacuation pipeline of tail gas scrubbing tower, the blow-down section of thick bamboo sets up tail gas VOCs detection device, tail gas VOCs detection device is connected with the teletransmission DCS control unit.
Further, the tail gas washing tower comprises a first tail gas washing tower and a second tail gas washing tower;
The waste water discharge port of the first tail gas washing tower is communicated with a desalted water heat exchange unit;
The waste water discharge port of the second tail gas washing tower is communicated with the desalted water inlet of the first tail gas washing tower.
Further, the tail gas washing tower comprises a first tail gas washing tower and a second tail gas washing tower;
The tail gas inlet of the first tail gas washing tower is communicated with the tail gas analysis tower, and the desalted water inlet of the first tail gas washing tower is communicated with the desalted water system;
The second tail gas washing tower is communicated with the tail gas analysis tower, a desalted water inlet of the second tail gas washing tower is communicated with the desalted water system, and a wastewater discharge port of the second tail gas washing tower is communicated with a wastewater discharge port of the first tail gas washing tower in parallel with the desalted water heat exchange unit.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, the desalted water heat exchanger is additionally arranged between the tail gas washing tower and the methanol/water separation tower, the low-temperature wastewater discharged from the tail gas washing tower is used for exchanging heat with the desalted water, so that the temperature of the desalted water is reduced, the washing effect of the desalted water on methanol in the tail gas is improved, the content of methanol in the tail gas emission is reduced, the emission tail gas is ensured to reach the standard, and the problem that VOCs of the low-temperature methanol washing and emptying tail gas exceeds the standard is solved.
Drawings
FIG. 1 is a schematic diagram of a system structure of an embodiment 1;
FIG. 2 is a schematic diagram of the system in embodiment 2;
FIG. 3 is a schematic diagram of the system in embodiment 3;
Wherein, the first tail gas washing tower is 1-the first regulating valve is 11-the second tail gas washing tower is 2-the second regulating valve is 21-the second regulating valve, 3-methanol/water separation tower, 4-desalted water heat exchange unit, 31-waste water regulating valve, 101-first waste water pump, 102-second waste water pump.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, but the present utility model is not limited to the embodiments described below.
Example 1
The raw gas entering the low-temperature methanol washing process is gradually absorbed by low-temperature methanol to remove acid gases such as CO 2, H 2 S, COS and the like, and finally discharged from a tail gas analysis tower.
Referring to fig. 1, in order to improve the washing effect of low-temperature methanol washing and reduce the content of methanol in the exhaust gas discharged from the exhaust gas analyzing tower, the embodiment provides a washing system for reducing the content of methanol in the low-temperature methanol washing exhaust gas, which comprises a first exhaust gas washing tower 1 and a methanol/water separation tower 3, wherein a desalted water inlet is arranged at the top of the first exhaust gas washing tower 1 and is communicated with a desalted water system; the bottom of the first tail gas washing tower 1 is provided with a tail gas inlet and a waste water discharge port, the tail gas inlet is communicated with a tail gas analysis tower, the waste water discharge port is communicated with the methanol/water separation tower 3, and a desalted water heat exchange unit 4 is arranged between the first tail gas washing tower 1 and the methanol/water separation tower 3. An evacuation pipeline is arranged at the top of the first tail gas washing tower 1, and the tail gas washed by desalted water is discharged from the evacuation pipeline of the first tail gas washing tower 1.
In order to reduce the temperature of desalted water and enhance the washing effect on methanol in the tail gas, a desalted water heat exchanger 4 is additionally arranged between the first tail gas washing tower 1 and the methanol/water separation tower 3, the desalted water heat exchanger 4 is used for heat exchange between unabsorbed methanol desalted water and waste water (i.e. the desalted water after absorbing methanol), the temperature of the waste water is lower, generally about 15-20 degrees, the low-temperature waste water discharged by the first tail gas washing tower 1 is used for heat exchange with the desalted water, the temperature of the desalted water is reduced, the washing effect of the desalted water on methanol in the tail gas is improved, the content of methanol in the tail gas emission is reduced, the emission tail gas is ensured to reach the standard, and the problem that VOCs (volatile organic compounds) in the tail gas is out-washed by the low-temperature methanol is solved.
The desalted water heat exchange unit 4 in the embodiment is preferably a tubular heat exchanger; the wastewater discharged by the tail gas water scrubber flows in the tube pass of the tube nest heat exchanger, desalted water flows in the shell pass of the tube nest heat exchanger, and the wastewater and the desalted water flow relatively in the tube nest heat exchanger, so that the heat exchange effect is enhanced.
The desalted water enters the first tail gas washing tower 1 from top to bottom, flows reversely with the methanol-containing tail gas entering from the bottom of the first tail gas washing tower 1, and the methanol in the tail gas is dissolved in the desalted water to realize the washing of the methanol in the tail gas by the desalted water.
The tail gas after getting rid of methyl alcohol is empty from the evacuation pipeline in first tail gas washing tower 1 top, and the top of first tail gas washing tower 1 sets up the evacuation section of thick bamboo, and the evacuation section of thick bamboo sets up VOCs detection device (VOCs detector), and VOCs detection device measures the content of methyl alcohol in the tail gas after the washing.
The desalted water after absorbing the methanol is discharged from a waste water discharge port at the bottom of the first tail gas washing tower 1 and exchanges heat with the desalted water without absorbing the methanol, then the desalted water after absorbing the methanol is returned to the methanol/water separation tower 3, the methanol in the desalted water with absorbing the methanol is separated from the waste water by the methanol/water separation tower 3, the methanol is returned to the methanol thermal regeneration system, and the waste water is sent outwards, so that the recovery of the methanol in the tail gas is realized.
In order to conveniently control the flow of desalted water, a desalted water regulating valve is arranged on a pipeline of the desalted water entering the first tail gas washing tower 1, in order to control the liquid level of wastewater in the first tail gas washing tower 1, and simultaneously control the flow of wastewater reflux, a wastewater regulating valve 31 is arranged between the methanol/water separation tower 3 and the desalted water heat exchange unit 4, and a wastewater pump is arranged between the first tail gas washing tower 1 and the desalted water heat exchange unit 4.
Example 2
In practice, the tail gas analyzing tower usually sets a plurality of sections according to the components and the flow of the tail gas, and the tail gas washing towers are correspondingly set a plurality of sections, based on the scheme in the above embodiment 1, please refer to fig. 2, this embodiment provides a second washing system for reducing the methanol content in the low-temperature methanol washing tail gas, two tail gas washing towers are set in this embodiment, namely, a first tail gas washing tower 1 and a second tail gas washing tower 2, and the first tail gas washing tower 1 and the second tail gas washing tower 2 of the tail gas washing tower are connected in parallel.
Specifically, a tail gas inlet of the first tail gas washing tower 1 is communicated with a tail gas analysis tower II section, a desalted water inlet of the first tail gas washing tower 1 is communicated with a desalted water system, and a first regulating valve 11 is arranged between the first tail gas washing tower 1 and the desalted water system; the waste water discharge port of the first tail gas washing tower 1 is communicated with the methanol/water separation tower 3, a first waste water pump 101 is arranged between the first tail gas washing tower 1 and the methanol/water separation tower 3, and tail gas after methanol absorption is emptied from the top of the first tail gas washing tower 1.
The second tail gas washing tower 2 is communicated with the sections I and III of the tail gas analysis tower, a desalted water inlet of the second tail gas washing tower 2 is communicated with a desalted water system, and a second regulating valve 21 is arranged between the second tail gas washing tower 2 and the desalted water system; the waste water discharge port of the second tail gas washing tower 2 is connected with the waste water discharge port parallel pipe of the first tail gas washing tower 1 and the methanol/water separation tower 3, the tail gas after absorbing methanol is connected with the top emptying port parallel pipe of the first tail gas washing tower 1, and a second waste water pump 102 is arranged between the second tail gas washing tower 2 and the first tail gas washing tower 1.
Namely, the first tail gas washing tower 1 and the second tail gas washing tower 2 independently operate, tail gases from different sections of the tail gas analysis tower respectively enter the first tail gas washing tower 1 and the second tail gas washing tower 2 for washing, the washed tail gases are discharged in parallel pipes, and the washed waste water enters the methanol/water separation tower 3 for recovering methanol.
Example 3
Referring to fig. 3, a scrubbing system for reducing the methanol content in low-temperature methanol-washing tail gas is provided in this embodiment, and the difference between the solution in this embodiment and the solution in embodiment 2 is that the first tail gas scrubbing tower 1 and the second tail gas scrubbing tower 2 are connected in series:
Specifically, the tail gas inlet of the first tail gas washing tower 1 is communicated with the tail gas analysis tower, the desalted water inlet of the first tail gas washing tower 1 is communicated with the desalted water system, and the wastewater discharge port of the first tail gas washing tower 1 is communicated with the desalted water heat exchange unit 4.
The tail gas inlet of the second tail gas washing tower 2 is communicated with the tail gas analysis tower, the desalted water inlet of the second tail gas washing tower 2 is communicated with the desalted water system, and the wastewater discharge port of the second tail gas washing tower 2 is communicated with the desalted water inlet of the first tail gas washing tower 1. In this embodiment, the wastewater discharge port of the second tail gas washing tower 2 is introduced into the middle part of the first tail gas washing tower 1, so that the first tail gas washing tower 1 is connected in series with the second tail gas washing tower 2, and the wastewater and desalted water of the second tail gas washing tower 2 are used as washing water together.
The tail gas containing a small amount of methanol simultaneously enters the first tail gas washing tower 1 and the second tail gas washing tower 2, desalted water in the first tail gas washing tower 1 and the second tail gas washing tower 2 washes the methanol in the tail gas, and wastewater discharged from the second tail gas washing tower 2 enters the first tail gas washing tower 1 to be continuously used as washing water to wash the tail gas entering the first tail gas washing tower 1, so that the methanol content in the wastewater is improved, and the consumption of desalted water is reduced. And then, the wastewater discharged from the first tail gas washing tower 1 enters a desalted water heat exchange unit 4 to exchange heat with desalted water to be fed into the washing tower, the temperature of the wastewater discharged from the tail gas washing tower is lower, the temperature of the desalted water is reduced by utilizing low-temperature wastewater discharged from the tail gas washing tower, and the washing effect of the desalted water on methanol in the tail gas is improved.
Example 4
In the washing system for reducing the methanol content in the low-temperature methanol washing tail gas provided by the embodiment, in order to control the liquid level of the wastewater in the tail gas washing tower, a remote transmission DCS control unit is arranged, meanwhile, a liquid level detection device is arranged in the tail gas washing tower and is electrically connected with the remote transmission DCS control unit, the remote transmission DCS control unit is electrically connected with the first regulating valve 11, and the remote transmission DCS control unit is electrically connected with the second regulating valve 21; the first wastewater pump 101 and the second wastewater pump 102 are centrifugal pumps, and the remote transmission DCS control unit is electrically connected with the first wastewater pump 101 and the second wastewater pump 102.
The remote transmission DCS control unit is a DCS controller of the existing tail gas washing system, and can regulate the power of the first wastewater pump 101 and the second wastewater pump 102 according to the liquid level in the tail gas washing tower; the opening degree of the first regulating valve 11 and the opening degree of the second regulating valve 21 can be controlled, the flow of desalted water can be controlled, the washing effect of methanol in tail gas can be guaranteed, the methanol content in the emptied tail gas can be guaranteed to be lower than 50mg/Nm 3, and the environment-friendly requirement can be met.
Claims (8)
1. A washing system for reducing the methanol content in low-temperature methanol washing tail gas is characterized in that: the device comprises a tail gas washing tower and a methanol/water separation tower (3), wherein a desalted water inlet and an emptying pipeline are arranged at the top of the tail gas washing tower, the desalted water inlet is communicated with a desalted water system, and the desalted water inlet and the emptying pipeline are arranged in parallel;
The bottom of the tail gas washing tower is provided with a tail gas inlet and a waste water discharge port, and the tail gas inlet is communicated with the tail gas analysis tower; a desalted water heat exchange unit (4) is arranged between the tail gas washing tower and the methanol/water separation tower (3), the wastewater discharge port is communicated with the methanol/water separation tower (3) through the desalted water heat exchange unit (4), and the desalted water heat exchange unit (4) is used for exchanging heat between wastewater and desalted water.
2. The scrubbing system for reducing methanol content in low temperature methanol scrubbing tail gas of claim 1, wherein: the desalted water heat exchange unit (4) is a tube-in-tube heat exchanger.
3. The scrubbing system for reducing methanol content in low temperature methanol scrubbing tail gas of claim 2, wherein: the tube side inlet of the tube nest heat exchanger is communicated with a wastewater discharge port of the tail gas washing tower, and the tube side outlet of the tube nest heat exchanger is communicated with the methanol/water separation tower (3); and a shell side inlet of the shell-side heat exchanger is communicated with a desalted water system, and a shell side outlet of the shell-side heat exchanger is communicated with a desalted water inlet of the tail gas washing tower.
4. A scrubbing system for reducing methanol content in a low temperature methanol scrubbing tail gas as defined in claim 3, wherein: a desalted water regulating valve is arranged on a pipeline of the desalted water entering the tail gas washing tower, a wastewater regulating valve (31) is arranged between the methanol/water separation tower (3) and the desalted water heat exchange unit (4), and a wastewater pump is arranged between the tail gas washing tower and the desalted water heat exchange unit (4).
5. The scrubbing system for reducing methanol content in a low temperature methanol scrubbing tail gas of claim 4, wherein: the device also comprises a remote DCS control unit, wherein a liquid level detection device is arranged in the tail gas washing tower and is connected with the remote DCS control unit; the remote DCS control unit is electrically connected with the desalted water regulating valve, the remote DCS control unit is electrically connected with the waste water regulating valve (31), and the remote DCS control unit is electrically connected with the waste water pump.
6. The scrubbing system for reducing methanol content in a low temperature methanol scrubbing tail gas of claim 5, wherein: the exhaust system is characterized in that an exhaust cylinder is arranged on an exhaust pipeline of the tail gas washing tower, a tail gas VOCs detection device is arranged on the exhaust cylinder, and the tail gas VOCs detection device is connected with a remote DCS control unit.
7. The scrubbing system for reducing methanol content in a low temperature methanol scrubbing tail gas of claim 6, wherein: the tail gas washing tower comprises a first tail gas washing tower (1) and a second tail gas washing tower (2);
The waste water discharge port of the first tail gas washing tower (1) is communicated with a desalted water heat exchange unit (4);
The tail gas inlet of the second tail gas washing tower (2) is communicated with the tail gas analysis tower, the desalted water inlet of the second tail gas washing tower (2) is communicated with the desalted water system, and the wastewater discharge port of the second tail gas washing tower (2) is communicated with the desalted water inlet of the first tail gas washing tower (1).
8. The scrubbing system for reducing methanol content in a low temperature methanol scrubbing tail gas of claim 6, wherein: the tail gas washing tower comprises a first tail gas washing tower (1) and a second tail gas washing tower (2);
The tail gas inlet of the first tail gas washing tower (1) is communicated with the tail gas analysis tower, and the desalted water inlet of the first tail gas washing tower (1) is communicated with a desalted water system;
The second tail gas washing tower (2) is communicated with the tail gas analysis tower, a desalted water inlet of the second tail gas washing tower (2) is communicated with a desalted water system, and a wastewater discharge port of the second tail gas washing tower (2) is communicated with a wastewater discharge port parallel pipe of the first tail gas washing tower (1) and a desalted water heat exchange unit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322656271.XU CN220918659U (en) | 2023-09-28 | 2023-09-28 | Washing system for reducing methanol content in low-temperature methanol washing tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322656271.XU CN220918659U (en) | 2023-09-28 | 2023-09-28 | Washing system for reducing methanol content in low-temperature methanol washing tail gas |
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| Publication Number | Publication Date |
|---|---|
| CN220918659U true CN220918659U (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322656271.XU Active CN220918659U (en) | 2023-09-28 | 2023-09-28 | Washing system for reducing methanol content in low-temperature methanol washing tail gas |
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| Country | Link |
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| CN (1) | CN220918659U (en) |
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2023
- 2023-09-28 CN CN202322656271.XU patent/CN220918659U/en active Active
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