CN210097125U - Dry gas sealing system for circulating propylene gas compressor - Google Patents
Dry gas sealing system for circulating propylene gas compressor Download PDFInfo
- Publication number
- CN210097125U CN210097125U CN201920716181.6U CN201920716181U CN210097125U CN 210097125 U CN210097125 U CN 210097125U CN 201920716181 U CN201920716181 U CN 201920716181U CN 210097125 U CN210097125 U CN 210097125U
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- Prior art keywords
- propylene
- gas
- liquid phase
- dry gas
- heat exchanger
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 title claims abstract description 146
- 238000007789 sealing Methods 0.000 title claims abstract description 25
- 239000007791 liquid phase Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000012071 phase Substances 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 7
- -1 polypropylene Polymers 0.000 claims description 17
- 239000004743 Polypropylene Substances 0.000 claims description 16
- 229920001155 polypropylene Polymers 0.000 claims description 16
- 238000007667 floating Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 86
- 238000002309 gasification Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000007792 gaseous phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Compressor (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a dry gas sealing system for circulating propylene gas compressor, include: the system comprises a liquid phase propylene storage tank, a propylene filter for filtering liquid phase propylene from the liquid phase propylene storage tank, a propylene booster pump for pressurizing and conveying the liquid phase propylene from the propylene filter, a propylene heater for heating and gasifying the liquid phase propylene from the propylene booster pump, a gas-liquid separation tank for separating gas and liquid phases of the propylene from the propylene heater, a propylene evaporator for further heating and increasing the temperature of gas phase propylene from the gas-liquid separation tank, and a circulating propylene gas compressor for receiving the propylene gas from the propylene evaporator as a sealing gas. The utility model discloses a dry gas sealing system can satisfy the high requirement to sealed gas purity through quoting fresh propylene gas, guarantees the aridity of sealed gas through setting up propylene heater, gas-liquid separation jar and propylene evaporimeter to can reach the purpose that the dry gas of protection is sealed, guarantee circulation propylene gas compressor even running.
Description
Technical Field
The utility model relates to a dry gas sealing system for circulating propylene gas compressor.
Background
The compressor is a device for compressing gas to increase gas pressure or conveying gas, and belongs to a core device in the chemical industry. Among other things, the seal, which is an important component of the compressor, directly affects the normal operation and life of the compressor. The dry gas seal is a novel non-contact seal developed on the basis of a gas dynamic pressure bearing in the 60 th century, and compared with a mechanical seal, the dry gas seal has the advantages of gas film lubrication, low power consumption, long service life, stable operation and the like, so that the dry gas seal is widely applied to large-scale centrifugal compressors in multiple fields of petroleum, chemical engineering, oil refining, natural gas and the like. And the working mode of air sealing can ensure that any sealing medium realizes zero escape, so that the sealing material has wide application prospect in the fields of toxic, harmful, inflammable and explosive gases.
The circulating propylene gas compressor is one of the core devices of the propylene recovery system of the polypropylene device, and mainly has the functions of collecting propylene monomers which do not participate in propylene polymerization reaction in a polypropylene reactor, compressing the propylene monomers to have certain pressure, and conveying the propylene monomers back to the polypropylene reactor to continuously participate in the reaction, so that the purpose of recycling is achieved.
The problems existing in the prior art are as follows: the circulating propylene gas compressor adopts a conveyed process medium, namely circulating propylene gas is used as dry gas for sealing, but a certain amount of polypropylene fine powder is carried in the circulating propylene gas when the circulating propylene gas leaves a polypropylene reactor, and even if various filters are designed and added on a process pipeline before a dry gas sealing inlet, the fine powder carried in the circulating propylene gas cannot be completely filtered. Because the requirement of dry gas sealing on the purity of sealing gas is high, the residual polypropylene fine powder can damage the sealing surface of the compressor, cause the fault shutdown of the compressor, further cause the circulating propylene gas to be discharged to a torch to be burnt, seriously affect the production stability of the device and bring great economic loss. Therefore, the stable operation of the circulating propylene gas compressor is the key point of energy conservation and consumption reduction of a continuous-method polypropylene production device and is the basic guarantee for controlling the operation cost.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dry gas seal system for circulating propylene gas compressor to for circulating propylene gas compressor provides qualified sealed gas, guarantee system steady operation.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a dry gas seal system for a recycle propylene gas compressor, the dry gas seal system comprising: the device comprises a liquid phase propylene storage tank, a propylene filter, a propylene booster pump, a propylene heater, a gas-liquid separation tank, a propylene evaporator and a circulating propylene gas compressor, wherein the propylene filter is used for filtering liquid phase propylene from the liquid phase propylene storage tank, the propylene booster pump is used for pressurizing and conveying the liquid phase propylene from the propylene filter, the propylene heater is used for heating and gasifying the liquid phase propylene from the propylene booster pump, the gas-liquid separation tank is used for carrying out gas-liquid separation on the propylene from the propylene heater, the propylene evaporator is used for further heating and heating gas phase propylene from the gas-liquid separation tank, and the circulating propylene gas compressor is used for receiving propylene gas from the propylene.
According to the utility model discloses a dry gas seal system, preferably, dry gas seal system still includes gaseous phase propylene conveyer pipe and polypropylene reactor, gaseous phase propylene conveyer pipe be used for with the propylene gas after circulation propylene gas compressor uses as sealed gas is sent into as reaction raw materials polypropylene reactor.
According to the dry gas sealing system of the present invention, preferably, the propylene filter is a double cartridge filter.
According to the utility model discloses a dry gas seal system, preferably, the filtration precision of propylene filter is not more than 10 μm.
According to the utility model discloses a dry gas seal system, preferably, the propylene booster pump is centrifugal pump, canned motor pump or reciprocating pump.
According to the utility model discloses a dry gas seal system, preferably, propylene heater is floating head heat exchanger, fixed tube sheet heat exchanger or U type heat exchanger.
According to the utility model discloses a dry gas seal system, preferably, propylene evaporimeter is floating head heat exchanger, fixed tube sheet heat exchanger or U type heat exchanger.
The beneficial effects of the utility model reside in that:
the utility model discloses a dry gas sealing system can satisfy the high requirement to sealed gas purity through quoting fresh propylene gas, can guarantee the aridity of sealed gas through setting up key equipment such as propylene heater, gas-liquid separation jar and propylene evaporimeter to can effectively avoid taking the sealed gas as sealed gas the sealed face of damage because of sealed gas secretly the polypropylene farine, arouse circulation propylene gas compressor fault shutdown, can reach the purpose that the protection dry gas is sealed, guarantee circulation propylene gas compressor even running.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a dry gas seal system of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.
As shown in fig. 1, the utility model discloses a dry gas seal system, dry gas seal system includes: a liquid phase propylene storage tank 9, a propylene filter 1 for filtering liquid phase propylene from the liquid phase propylene storage tank 9, a propylene booster pump 2 for pressurizing and conveying the liquid phase propylene from the propylene filter 1, a propylene heater 3 for heating and gasifying the liquid phase propylene from the propylene booster pump, a gas-liquid separation tank 4 for gas-liquid separating the propylene from the propylene heater 3, a propylene evaporator 5 for further heating and raising temperature of gas phase propylene from the gas-liquid separation tank 4, and a circulating propylene gas compressor 6 for receiving propylene gas from the propylene evaporator 5 as a seal gas. Wherein the propylene filter 1 may be a double-cartridge filter, preferably a double-cartridge stainless steel type filter; the filtration accuracy of the propylene filter 1 is not more than 10 μm, preferably not more than 6 μm, further preferably not more than 3 μm, such as 3 μm, 2 μm and 1 μm; the propylene booster pump 2 can be a centrifugal pump, a canned motor pump or a reciprocating pump, and is preferably a canned motor pump; the propylene heater 3 is a floating head type heat exchanger, a fixed tube plate type heat exchanger or a U-shaped tube heat exchanger, preferably a fixed tube plate type heat exchanger; the propylene evaporator 5 is a floating head type heat exchanger, a fixed tube plate type heat exchanger or a U-shaped tube heat exchanger, preferably a U-shaped tube heat exchanger.
The double-cylinder filter is also called double-cylinder oil return pipeline filter, is composed of two single-cylinder filters and a two-position six-way reversing valve, has simple structure and convenient use, and is provided with a bypass valve and a filter element to pollute and block the signal transmitter so as to achieve the purpose of ensuring the safety of the system.
The centrifugal pump is a pump for conveying a liquid by centrifugal force generated when an impeller rotates.
Reciprocating pumps include piston pumps, metering pumps and diaphragm pumps, commonly known as reciprocating pumps. It is one of positive displacement pumps and has wide application. Reciprocating pumps are delivery machines that provide energy directly to a liquid in the form of pressure energy through the reciprocating motion of a piston.
The structure principle of the canned motor pump is the same as that of a common centrifugal pump, and the difference is that a motor is driven. The motor of the canned motor pump is completely sealed in the second layer of isolation sleeve or the canned motor sleeve, and the leakage prevention mainly depends on the internal anti-corrosion canned motor sleeve.
The heat exchanger can be divided into a fixed tube plate type heat exchanger, a floating head type heat exchanger, a U-shaped tube heat exchanger and a packing box type heat exchanger according to the structural form. The fixed tube-plate heat exchanger is a shell-and-tube heat exchanger with tube plates at two ends of a tube bundle fixedly connected with a shell by adopting a welding method.
The utility model discloses a dry gas sealing system, through heating the gasification back with liquid fresh propylene, the sealed department of dry gas that causes circulation propylene gas compressor 6 washes, seals, can effectively avoid carrying the polypropylene farine and damaging the circulation propylene gas compressor 6 trouble that sealed face arouses and park as sealed gas when can effectively avoiding circulating propylene gas as sealed gas because of sealed gas, prolongs the sealed life of compressor dry gas, guarantees the long period steady operation of circulation propylene gas compressor.
In one embodiment, the dry gas sealing system further comprises a gas phase propylene conveying pipe 7 and a polypropylene reactor 8, wherein the gas phase propylene conveying pipe 7 is used for conveying propylene gas after the circulating propylene gas compressor 6 is used as sealing gas to the polypropylene reactor 8 as reaction raw material so as to recycle the propylene gas.
When the device is in operation, liquid fresh propylene from the liquid phase propylene storage tank 9 is filtered to remove impurities through the propylene filter 1, enters the propylene booster pump 2 for pressurization, enters the propylene heater 3 for heating and gasification, then enters the gas-liquid separation tank 4 for gas-liquid separation, and separated gas phase propylene enters the propylene evaporator 5 for further gasification, and then is introduced to a dry gas seal position of the circulating propylene gas compressor 6 for flushing and sealing; the propylene gas used as the seal gas is sent to a polypropylene reactor 8 as a raw material through a gas phase propylene conveying pipe 7 to react and be recovered.
The above embodiments are only for illustrative purposes, but not for limiting the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention, so all equivalent technical solutions should also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (7)
1. A dry gas seal system for a recycle propylene gas compressor, the dry gas seal system comprising: the device comprises a liquid phase propylene storage tank (9), a propylene filter (1) for filtering liquid phase propylene from the liquid phase propylene storage tank, a propylene booster pump (2) for pressurizing and conveying the liquid phase propylene from the propylene filter, a propylene heater (3) for heating and gasifying the liquid phase propylene from the propylene booster pump, a gas-liquid separation tank (4) for carrying out gas-liquid separation on the propylene from the propylene heater, a propylene evaporator (5) for further heating and warming gas phase propylene from the gas-liquid separation tank and a circulating propylene gas compressor (6) for receiving propylene gas from the propylene evaporator (5) as sealing gas.
2. The dry gas seal system according to claim 1, further comprising a gas phase propylene delivery pipe (7) and a polypropylene reactor (8), wherein the gas phase propylene delivery pipe (7) is used for delivering the propylene gas used as the seal gas by the recycle propylene gas compressor (6) as a reaction raw material into the polypropylene reactor (8).
3. Dry gas sealing system according to claim 1 or 2, wherein the propylene filter (1) is a double cartridge filter.
4. Dry gas sealing system according to claim 3, wherein the filtration accuracy of the propylene filter (1) is not more than 10 μm.
5. Dry gas sealing system according to any one of claims 1, 2 and 4, wherein the propylene booster pump (2) is a centrifugal pump, a canned pump or a reciprocating pump.
6. Dry gas sealing system according to any one of claims 1, 2 and 4, wherein the propylene heater (3) is a floating head heat exchanger, a fixed tube plate heat exchanger or a U-tube heat exchanger.
7. Dry gas sealing system according to any one of claims 1, 2 and 4, wherein the propylene evaporator (5) is a floating head heat exchanger, a fixed tube plate heat exchanger or a U-tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716181.6U CN210097125U (en) | 2019-05-17 | 2019-05-17 | Dry gas sealing system for circulating propylene gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920716181.6U CN210097125U (en) | 2019-05-17 | 2019-05-17 | Dry gas sealing system for circulating propylene gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210097125U true CN210097125U (en) | 2020-02-21 |
Family
ID=69560853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920716181.6U Active CN210097125U (en) | 2019-05-17 | 2019-05-17 | Dry gas sealing system for circulating propylene gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210097125U (en) |
-
2019
- 2019-05-17 CN CN201920716181.6U patent/CN210097125U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |