CN108591026B - Sealing method of vacuum compressor in acetylene preparation from natural gas - Google Patents
Sealing method of vacuum compressor in acetylene preparation from natural gas Download PDFInfo
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- CN108591026B CN108591026B CN201711422220.3A CN201711422220A CN108591026B CN 108591026 B CN108591026 B CN 108591026B CN 201711422220 A CN201711422220 A CN 201711422220A CN 108591026 B CN108591026 B CN 108591026B
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- solvent
- buffer tank
- vacuum compressor
- gas
- liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a sealing method of a vacuum compressor in acetylene preparation from natural gas, wherein gas at the outlet of the vacuum compressor is separated in a gas-liquid separator, liquid phase separated by the gas-liquid separator enters a solvent buffer tank through a liquid level regulating valve of the gas-liquid separator, a vent pipe at the top of the solvent buffer tank is discharged to the air, a solvent in the solvent buffer tank is sent to a solvent cooler through a pump for cooling, one part of the cooled solvent enters the vacuum compressor for gas cooling, and the other part of the cooled solvent is sent to a mechanical seal of the vacuum compressor to be used as a sealing medium. The invention is fully suitable for the sealing of the vacuum compressor in the natural gas acetylene preparation device, and after the liquid phase of the gas-liquid separator at the outlet of the vacuum compressor is cooled, a part of the liquid phase is sent to the mechanical seal of the vacuum compressor to be used as a sealing medium, so that the sealing requirement can be met, and desalted water is not added into a solvent system, thereby reducing the energy consumption and material consumption and effectively reducing the operation cost of the device.
Description
Technical Field
The invention belongs to the technical field of chemical equipment sealing, and particularly relates to a sealing method of a vacuum compressor applied to acetylene preparation from natural gas.
Background
In the natural gas acetylene production device, desalted water is originally adopted as a sealing medium for machine seal water of a vacuum compressor, during operation, most desalted water is found to enter the vacuum compressor through the machine seal, the machine seal water enters an NMP solvent system, and the solvent regeneration needs to evaporate the redundant water, which needs to consume a large amount of heat energy or steam. If too much mechanical seal water enters the NMP solvent system, the gas-liquid balance of the solvent regeneration unit tower equipment can even be damaged. In the existing flow, the liquid phase of the gas-liquid separator at the outlet of the vacuum compressor is cooled and then sprayed into the vacuum compressor to be used as a cooling medium of the compressor.
Disclosure of Invention
The invention aims to: aiming at the problems, the sealing method of the vacuum compressor in acetylene preparation from natural gas is provided, which can meet the sealing requirement and ensure that no sealing desalted water enters a solvent system, thereby reducing the energy consumption and material consumption.
The technical scheme of the invention is realized as follows: a sealing method of a vacuum compressor in acetylene preparation from natural gas, wherein gas at the outlet of the vacuum compressor is separated in a gas-liquid separator, and is characterized in that: the liquid phase separated by the gas-liquid separator enters a solvent buffer tank through a gas-liquid separator liquid level regulating valve, an emptying pipe at the top of the solvent buffer tank is discharged to the air, the solvent in the solvent buffer tank is sent into a solvent cooler through a pump to be cooled, one part of the cooled solvent enters the inside of a vacuum compressor to be used for gas cooling, and the other part of the cooled solvent is sent into a mechanical seal of the vacuum compressor to be used as a sealing medium.
The invention relates to a sealing method of a vacuum compressor in acetylene preparation from natural gas, wherein the liquid level of a solvent buffer tank is subjected to split-range adjustment by a liquid inlet level adjusting valve and a liquid outlet level adjusting valve of the solvent buffer tank so as to maintain the stability of the liquid level in the solvent buffer tank.
According to the sealing method of the vacuum compressor in acetylene preparation from natural gas, the solvent buffer tank is subjected to nitrogen seal protection by adopting a nitrogen seal valve for pressure regulation.
The invention relates to a sealing method of a vacuum compressor in acetylene preparation from natural gas, which is characterized in that a solvent which is sent into a mechanical seal of the vacuum compressor and is used as a sealing medium is finally returned to a solvent buffer tank.
The invention is fully suitable for the sealing of the vacuum compressor in the natural gas acetylene preparation device, and after the liquid phase of the gas-liquid separator at the outlet of the vacuum compressor is cooled, a part of the liquid phase is sent to the mechanical seal of the vacuum compressor to be used as a sealing medium, so that the sealing requirement can be met, and desalted water is not added into a solvent system, thereby reducing the energy consumption and material consumption and effectively reducing the operation cost of the device.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
The labels in the figure are: 1 is vapour and liquid separator, 2 is the solvent buffer tank, 3 is vapour and liquid separator liquid level governing valve, 4 is the blow-down pipe, 5 is the pump, 6 is the solvent cooler, 7 is solvent buffer tank feed liquor liquid level governing valve, 8 is solvent buffer tank play liquid level governing valve, 9 is the nitrogen seal valve, 10 is vacuum compressor.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, the main related equipment of the sealing method of the vacuum compressor in the acetylene preparation from natural gas comprises a gas-liquid separator 1, a solvent buffer tank 2, a gas-liquid separator liquid level regulating valve 3, a blow-down pipe 4, a pump 5, a solvent cooler 6, a solvent buffer tank liquid inlet liquid level regulating valve 7, a solvent buffer tank liquid outlet liquid level regulating valve 8, a nitrogen seal valve 9 and a vacuum compressor 10.
The gas of vacuum compressor 10 export is separated in vapour and liquid separator 1, and the acetylene gas through the separation of vapour and liquid separator 1 gets into the low reaches from the upper portion export of vapour and liquid separator 1, and the liquid phase through the separation of vapour and liquid separator 1 passes through vapour and liquid separator liquid level governing valve 3 and gets into solvent buffer tank 2 from the lower part of vapour and liquid separator 1, solvent buffer tank 2 adopts nitrogen seal valve 9 pressure regulating to carry out nitrogen seal protection in order to prevent that the acetylene accumulation from producing the risk in equipment, the blow-down pipe 4 at 2 tops of solvent buffer tank is to the atmospheric altitude point release, the liquid level of solvent buffer tank 2 is carried out the journey by solvent buffer tank feed liquor liquid level governing valve 7 and solvent buffer tank play liquid level governing valve 8 and is adjusted to maintain the stability of liquid level in the solvent buffer tank 2. The solvent in the solvent buffer tank 2 is sent to a solvent cooler 6 through a pump 5 for cooling, one part of the cooled solvent enters a vacuum compressor 10 for gas cooling, the other part of the cooled solvent is sent to a machine seal of the vacuum compressor as a sealing medium, and the solvent sent to the machine seal of the vacuum compressor 10 as the sealing medium is finally returned to the solvent buffer tank 2.
The invention can meet the sealing requirement and ensure that no desalted water is added into a solvent system, thereby reducing the energy consumption and material consumption. The sealing scheme can be fully suitable for the sealing of the vacuum compressor in the device for preparing acetylene from natural gas.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A sealing method of a vacuum compressor in acetylene preparation from natural gas, wherein gas at the outlet of the vacuum compressor is separated in a gas-liquid separator, and is characterized in that: the liquid phase through the gas-liquid separator separation passes through gas-liquid separator liquid level governing valve and gets into the solvent buffer tank, the blow-down pipe at solvent buffer tank top is to empty discharge, the solvent in the solvent buffer tank is sent into the solvent cooler through the pump and is cooled off, and the solvent after the cooling partly gets into the inside gaseous cooling that is used for of vacuum compressor, and the machine that the vacuum compressor was sent into to another part seals as sealing medium, the solvent buffer tank adopts nitrogen seal valve pressure regulating to carry out nitrogen and seals the protection, and the machine that sends into vacuum compressor seals as sealing medium's solvent and finally returns in the solvent buffer tank.
2. The method for sealing the vacuum compressor in acetylene production from natural gas according to claim 1, wherein the method comprises the following steps: the liquid level of the solvent buffer tank is adjusted in a split-range mode through a liquid inlet level adjusting valve of the solvent buffer tank and a liquid outlet level adjusting valve of the solvent buffer tank so as to maintain the stability of the liquid level in the solvent buffer tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422220.3A CN108591026B (en) | 2017-12-25 | 2017-12-25 | Sealing method of vacuum compressor in acetylene preparation from natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711422220.3A CN108591026B (en) | 2017-12-25 | 2017-12-25 | Sealing method of vacuum compressor in acetylene preparation from natural gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108591026A CN108591026A (en) | 2018-09-28 |
| CN108591026B true CN108591026B (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711422220.3A Active CN108591026B (en) | 2017-12-25 | 2017-12-25 | Sealing method of vacuum compressor in acetylene preparation from natural gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN108591026B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0968183A (en) * | 1995-09-04 | 1997-03-11 | Kobe Steel Ltd | Oil-cooled positive-displacement compressor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002227769A (en) * | 2001-02-05 | 2002-08-14 | Kobe Steel Ltd | Oil injection type compressor |
| JP2002227786A (en) * | 2001-02-05 | 2002-08-14 | Kobe Steel Ltd | Oil-cooled compressor |
| JP2002317786A (en) * | 2001-04-18 | 2002-10-31 | Kobe Steel Ltd | Oil injection type compressor and operating method thereof |
| JP5373335B2 (en) * | 2008-08-08 | 2013-12-18 | 株式会社神戸製鋼所 | Refrigeration equipment |
-
2017
- 2017-12-25 CN CN201711422220.3A patent/CN108591026B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0968183A (en) * | 1995-09-04 | 1997-03-11 | Kobe Steel Ltd | Oil-cooled positive-displacement compressor |
Non-Patent Citations (1)
| Title |
|---|
| 罗义文等.等离子体裂解天然气制乙炔的技术和经济分析.《天然气化工》.2002,第27卷(第3期),第37-42页. * |
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| CN108591026A (en) | 2018-09-28 |
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