CN220979782U - Low-temperature high-pressure methanol pump cold pump exhaust system - Google Patents
Low-temperature high-pressure methanol pump cold pump exhaust system Download PDFInfo
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- CN220979782U CN220979782U CN202323058226.0U CN202323058226U CN220979782U CN 220979782 U CN220979782 U CN 220979782U CN 202323058226 U CN202323058226 U CN 202323058226U CN 220979782 U CN220979782 U CN 220979782U
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- pressure
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- methanol
- valve
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 372
- 239000011521 glass Substances 0.000 claims abstract description 44
- 238000005406 washing Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model discloses a low-temperature high-pressure methanol pump cold pump exhaust system, wherein a washing tower is respectively connected with a first high-pressure methanol pump and a second high-pressure methanol pump in parallel through pipelines, the first high-pressure methanol pump is respectively connected with a first low-pressure end exhaust valve, a first high-pressure end exhaust valve and a first mechanical seal seat, and then is connected with a hose through a pipeline, the hose is connected with a pipeline straight-through sight glass, and the pipeline straight-through sight glass is connected with a dirty methanol ground tank through a sewage draining valve; the second high-pressure methanol pump is respectively connected with the second low-pressure end exhaust valve, the second high-pressure end exhaust valve and the second mechanical seal seat, and then is connected with the dirty methanol ground tank through a hose, a pipeline through sight glass and a blow-down valve in sequence; and during the reverse pumping, the high-pressure methanol after the backflow is sent to the high-pressure methanol pump through the inlet valve, and the cold pump is used for exhausting, so that the high-pressure methanol is prevented from directly entering the pump body to puncture the sealing gasket of the sealing seat, the leakage risk is reduced, the inspection and maintenance frequency is reduced, and the repair cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of chemical industry high-pressure multistage methanol pump operation systems, and particularly relates to a low-temperature high-pressure methanol pump cold pump exhaust system.
Background
The low-temperature methanol washing method can remove various components in the gas, improve the purification degree of the gas, and simultaneously can selectively remove and recycle H 2 S and CO 2 in the raw material gas. However, methanol is easily gasified, and in the process of stopping a methanol pump and periodically reversing the pump in the process of washing the methanol at a low temperature of synthetic ammonia, the methanol gas in the pump body needs to be discharged. At present, the exhaust mode generally adopted is to set an open cone hopper, so that the open cone hopper is connected with an exhaust pipeline arranged on a high-pressure methanol pump, methanol in the exhaust pipeline is collected and then flows into a dirty methanol ground tank, and the following risks exist in the exhaust mode:
1. The methanol and hydrogen sulfide taste can drift out on site during discharge, and the taste is thicker, so that the on-site methanol gas alarm and toxic gas alarm can be easily triggered;
2. In the discharging process, whether the materials are discharged or cleaned is inconvenient to observe, and whether methanol flows at the opening of the cone hopper or not is dangerous for hurting people due to splashing of the methanol;
3. The high-concentration site danger of the hydrogen sulfide gas in the discharging process is increased;
4. The smell of methanol in the discharging process is escaped, and the risk of fire explosion exists.
In addition, in the actual production process, the high-pressure methanol pump adopts a standby mode, in order to ensure continuous production of low-temperature methanol, the low-temperature methanol subjected to cooling treatment by the high-pressure methanol pump is often conveyed to another standby high-pressure methanol pump, but the high-pressure methanol pump has very high pressure when being discharged, and when the high-pressure methanol pump is directly conveyed to another high-pressure methanol pump, the internal pressure is suddenly increased, and a sealing seat sealing gasket connected with the high-pressure methanol pump is easily damaged, so that methanol leakage is caused, and safety accidents are induced.
Disclosure of utility model
Aiming at the technical problems, the utility model provides a low-temperature high-pressure methanol pump cold pump exhaust system, which is used for exhausting methanol gas in the system during the stop or periodical pump reversing of a high-pressure methanol pump, protecting a sealing gasket of a mechanical seal seat from being damaged by high pressure and improving the safety.
In order to achieve the above purpose, the utility model provides a cold pump exhaust system of a low-temperature high-pressure methanol pump, wherein a washing tower is respectively connected with a first high-pressure methanol pump and a second high-pressure methanol pump in parallel through pipelines, the first high-pressure methanol pump is respectively connected with a first low-pressure end exhaust valve, a first high-pressure end exhaust valve and a first mechanical seal seat, and then is connected with a hose through a pipeline, the hose is connected with a pipeline through sight glass, and the pipeline through sight glass is connected with a dirty methanol ground tank through a sewage draining valve; the second high-pressure methanol pump is respectively connected with the second low-pressure end exhaust valve, the second high-pressure end exhaust valve and the second mechanical seal seat, and then is connected with the dirty methanol ground tank through a hose, a pipeline through sight glass and a blow-down valve in sequence.
Preferably, the first high-pressure methanol pump is connected with a first outlet valve through a pipeline, and the first outlet valve is connected with a washing tower pipeline; the second high-pressure methanol pump is connected with a second outlet valve pipeline, and the second outlet valve is connected with a washing tower pipeline.
Further preferably, a first pressure gauge is arranged on a pipeline between the first high-pressure methanol pump and the first outlet valve; and a second pressure gauge is arranged on a pipeline between the second high-pressure methanol pump and the second outlet valve.
Further preferably, the first outlet valve and the second outlet valve are connected with the first high-pressure methanol pump and the second high-pressure methanol pump respectively through pipelines.
Preferably, the washing tower is connected with a first high-pressure methanol pump through a first inlet valve; the washing tower is connected with a second high-pressure methanol pump through a second inlet valve.
Preferably, the pipeline through sight glass is provided with a sight glass barrel, and a first sight glass opening and a second sight glass opening are arranged on two sides of the sight glass barrel; the top of the inner part of the view tube is provided with a view mirror extension tube.
Preferably, an exhaust pressure gauge is arranged on a pipeline between the first low-pressure end exhaust valve and the hose.
The utility model has the beneficial effects that:
1. The pipeline is arranged at the outlet of the high-pressure methanol pump and connected with the inlet of the high-pressure methanol pump, so that cooled low-temperature methanol can be conveyed to the spare high-pressure methanol pump for cold pumping, continuous production is ensured, meanwhile, the high-pressure methanol is prevented from being directly conveyed to the high-pressure methanol pump, the leakage of methanol caused by puncturing of a sealing gasket such as an exhaust valve and a mechanical seal seat due to high pressure is avoided, the safety of the system is improved, and the overhaul frequency is reduced.
2. The pipeline through sight glass is arranged between the high-pressure methanol pump and the polluted methanol geosyncline, the sight glass extension pipe is additionally arranged at the top of the pipeline through sight glass, the length of the sight glass extension pipe reaches the position of 1/3 of the upper part of the sight glass, the sight glass opening made of the pipe orifice contrast glass material can effectively flush water mist on glass, the flow of methanol is convenient to observe, the low-temperature methanol is prevented from being discharged out of the rearview mirror opening to form mist, and meanwhile, the defect that the methanol is difficult to observe along the wall flow is avoided.
3. A section of hose is arranged on the pipeline between the valve and the pipeline through sight glass, so that the problem that the exhaust pipeline is violently vibrated due to the fact that the opening of the valve is not controlled is solved, and the safety risk is reduced. The hose is made of metal, so that static electricity can be led out while vibration is eliminated.
4. The whole system adopts a fully-closed state, and methanol smell drift and hydrogen sulfide smell are avoided during running, stopping and pump reversing, so that the safety is high.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic structural view of the tube through sight glass according to the present utility model.
In the figure, 1 is a first inlet valve, 2 is a first high-pressure methanol pump, 3 is a first low-pressure end exhaust valve, 4 is a first high-pressure end exhaust valve, 5 is a first machine seal seat, 6 is a blow-off valve, 7 is a dirty methanol ground tank, 8 is an exhaust pressure gauge, 9 is a pipeline through sight glass, 10 is a first outlet valve, 11 is a second inlet valve, 12 is a second high-pressure methanol pump, 13 is a first pressure gauge, 14 is a second pressure gauge, 15 is a second outlet valve, 16 is a hose, 17 is a second low-pressure end exhaust valve, 18 is a second high-pressure end exhaust valve, 19 is a second machine seal seat, 20 is a sight glass barrel, 21 is a sight glass extension pipe, 22 is a first sight glass opening, 23 is a second sight glass opening, and 24 is a washing tower.
Detailed Description
The technical solution of the present utility model will be further explained below with reference to the accompanying drawings and specific embodiments, and it should be noted that the following embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model shall be defined by the claims. Modifications and substitutions made by those skilled in the art without the inventive effort fall within the scope of the present utility model.
Example 1
The low-temperature high-pressure methanol pump cold pump exhaust system is characterized in that a washing tower 24 is connected with a first high-pressure methanol pump 2 and a second high-pressure methanol pump 12 in parallel through pipelines, the first high-pressure methanol pump 2 is connected with a first low-pressure end exhaust valve 3, a first high-pressure end exhaust valve 4 and a first mechanical seal seat 5 respectively, and then is connected with a hose 16 through a pipeline, the hose 16 is connected with a pipeline through sight glass 9, and the pipeline through sight glass 9 is connected with a dirty methanol ground tank 7 through a blow-down valve 6; the second high-pressure methanol pump 12 is respectively connected with a second low-pressure end exhaust valve 17, a second high-pressure end exhaust valve 18 and a second mechanical seal seat 19, and then is connected with the dirty methanol ground tank 7 through a metal hose 16, a pipeline through sight glass 9 and a blow-down valve 6 in sequence.
Preferably, the first high-pressure methanol pump 2 is connected with the first outlet valve 10 through a pipeline, and the first outlet valve 10 is connected with the pipeline of the washing tower 24; the second high-pressure methanol pump 12 is connected with a second outlet valve 15 in a pipeline, and the second outlet valve 15 is connected with a washing tower 24 in a pipeline.
Further preferably, a first pressure gauge 13 is arranged on a pipeline between the first high-pressure methanol pump 2 and the first outlet valve 10; a second pressure gauge 14 is arranged on the pipeline between the second high-pressure methanol pump 12 and the second outlet valve 15.
Further preferably, the first outlet valve 10 and the second outlet valve 15 are connected to the first high-pressure methanol pump 2 and the second high-pressure methanol pump 12, respectively, via pipelines.
Preferably, the washing tower 24 is connected with the first high-pressure methanol pump 2 through the first inlet valve 1; the scrubber 24 is connected via a second inlet valve 11 to a second high pressure methanol pump 12.
Preferably, the pipe through sight glass 9 is provided with a sight glass tube 20, and both sides of the sight glass tube 20 are provided with a first sight glass opening 22 and a second sight glass opening 23; the inner top of the view tube 20 is provided with a view mirror extension tube 21.
Preferably, a vent pressure gauge 8 is arranged on a pipeline between the first low-pressure end vent valve 3 and the metal hose 16.
Example 2 run flow
Opening a first inlet valve 1 to enable methanol flowing back at the top of a washing tower 24 to enter a first high-pressure methanol pump 2, gradually pressurizing and cooling the methanol, slightly opening a first low-pressure end exhaust valve 3, opening a blow-down valve 6, and enabling sulfur-containing methanol in the first high-pressure methanol pump 2 to enter a dirty methanol ground tank 7 through a hose 16, a pipeline through sight glass 9 and the blow-down valve 6 under the driving of pressure; the low-temperature methanol treated by the first high-pressure methanol pump 2 is returned to the washing tower 24 for recycling through the first outlet valve 10; the pressure at the outlet of the first high-pressure methanol pump 2 is monitored by means of a first pressure gauge 13.
The first high-pressure methanol pump 2 is reversely pumped to the front of the second high-pressure methanol pump 12, the second inlet valve 11 is opened, the low-temperature methanol treated by the first high-pressure methanol pump 2 is conveyed to the second high-pressure methanol pump 12, and simultaneously, the second low-pressure end exhaust valve 17, the second high-pressure end exhaust valve 18 and the second mechanical seal seat 19 are sequentially opened for exhaust; after the pointer of the exhaust pressure gauge 8 on the pipeline is stable, opening the second outlet valve 15, closing the second low-pressure end exhaust valve 17, the second high-pressure end exhaust valve 18 and the second mechanical seal seat 19, and observing that no methanol drips and leaks in the pipeline through sight glass 9 to ensure that the three valves are completely closed; and ending the cold pump when the temperature of the second high-pressure methanol pump 12 is reduced to-45 ℃, closing the first inlet valve 1 and the first outlet valve 10, and finishing the reverse pump. After the pump is reversed, the pressure at the outlet of the second high-pressure methanol pump 12 is monitored by a second pressure gauge 14.
Claims (7)
1. The utility model provides a cold pump exhaust system of low temperature high pressure methanol pump which characterized in that: the washing tower (24) is respectively connected with the first high-pressure methanol pump (2) and the second high-pressure methanol pump (12) in parallel through pipelines, the first high-pressure methanol pump (2) is respectively connected with the first low-pressure end exhaust valve (3), the first high-pressure end exhaust valve (4) and the first mechanical seal seat (5), and then is connected with the hose (16) through the pipelines, the hose (16) is connected with the pipeline through sight glass (9), and the pipeline through sight glass (9) is connected with the polluted methanol ground tank (7) through the blowdown valve (6); the second high-pressure methanol pump (12) is respectively connected with a second low-pressure end exhaust valve (17), a second high-pressure end exhaust valve (18) and a second sealing seat (19), and then is connected with the dirty methanol ground tank (7) through a hose (16), a pipeline through sight glass (9) and a blow-down valve (6) in sequence.
2. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 1, wherein: the first high-pressure methanol pump (2) is connected with a first outlet valve (10) through a pipeline, and the first outlet valve (10) is connected with a washing tower (24) through a pipeline; the second high-pressure methanol pump (12) is connected with a second outlet valve (15) in a pipeline, and the second outlet valve (15) is connected with a washing tower (24) in a pipeline.
3. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 2, wherein: a first pressure gauge (13) is arranged on a pipeline between the first high-pressure methanol pump (2) and the first outlet valve (10); and a second pressure gauge (14) is arranged on a pipeline between the second high-pressure methanol pump (12) and the second outlet valve (15).
4. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 2, wherein: the first outlet valve (10) and the second outlet valve (15) are respectively connected with the first high-pressure methanol pump (2) and the second high-pressure methanol pump (12) through pipelines.
5. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 1, wherein: the washing tower (24) is connected with a first high-pressure methanol pump (2) through a first inlet valve (1); the washing tower (24) is connected with a second high-pressure methanol pump (12) through a second inlet valve (11).
6. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 1, wherein: the pipeline straight-through sight glass (9) is provided with a sight glass tube (20), and both sides of the sight glass tube (20) are provided with a first sight glass opening (22) and a second sight glass opening (23); the inner top of the view tube (20) is provided with a view mirror extension tube (21).
7. The low temperature and high pressure methanol pump cold pump exhaust system according to claim 1, wherein: an exhaust pressure gauge (8) is arranged on a pipeline between the first low-pressure end exhaust valve (3) and the hose (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323058226.0U CN220979782U (en) | 2023-11-13 | 2023-11-13 | Low-temperature high-pressure methanol pump cold pump exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323058226.0U CN220979782U (en) | 2023-11-13 | 2023-11-13 | Low-temperature high-pressure methanol pump cold pump exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220979782U true CN220979782U (en) | 2024-05-17 |
Family
ID=91061274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323058226.0U Active CN220979782U (en) | 2023-11-13 | 2023-11-13 | Low-temperature high-pressure methanol pump cold pump exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220979782U (en) |
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2023
- 2023-11-13 CN CN202323058226.0U patent/CN220979782U/en active Active
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