CN212481743U - Low-temperature damage prevention equipment for propylene refrigeration compressor - Google Patents
Low-temperature damage prevention equipment for propylene refrigeration compressor Download PDFInfo
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- CN212481743U CN212481743U CN202020096413.5U CN202020096413U CN212481743U CN 212481743 U CN212481743 U CN 212481743U CN 202020096413 U CN202020096413 U CN 202020096413U CN 212481743 U CN212481743 U CN 212481743U
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- Prior art keywords
- refrigerant
- propylene
- pressure
- user
- compression device
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 title claims abstract description 54
- 238000005057 refrigeration Methods 0.000 title claims description 14
- 230000002265 prevention Effects 0.000 title description 4
- 239000003507 refrigerant Substances 0.000 claims abstract description 81
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 239000007791 liquid phase Substances 0.000 claims abstract description 13
- 239000006200 vaporizer Substances 0.000 claims abstract description 10
- 230000005494 condensation Effects 0.000 claims abstract description 6
- 238000009833 condensation Methods 0.000 claims abstract description 6
- 230000003139 buffering effect Effects 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 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
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model discloses chemical industry technical field specificly discloses a low temperature damage equipment is prevented to propylene compressor, a serial communication port, include: the refrigerant storage tank is used for storing refrigerants; the first compression device is used for compressing the refrigerant which is circulated by the first user; the second compression device is used for compressing the refrigerant which is circulated by the user II; a condenser for condensing the circulating refrigerant; the refrigerant storage tank, the first compression device, the second compression device and the condenser form a circulating condensation system; the propylene vaporizer is communicated with the circulating system and the liquid phase propylene spherical tank, vaporizes propylene in the liquid phase propylene spherical tank, and introduces the vaporized propylene into the circulating system for equipment protection. The utility model discloses the advantage: simple structure, safety and reliability, good protectiveness and convenient popularization and implementation.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a low-temperature damage prevention device for a propylene refrigeration compressor.
Background
The propylene refrigeration compressor adopts a two-stage double-screw oil injection compressor, and is generally in a nitrogen environment of 0.1MPag-0.4MPag before the system is started so as to prevent liquid propylene from entering the system for flash evaporation to cause low temperature. During driving, high-pressure liquid propylene is added into the system, and the gas-phase propylene generated by flash evaporation of the liquid propylene is used for driving. The method can effectively avoid the possibility of low temperature of the system, but nitrogen in the system needs to be discharged completely before the compressor is started, and a large amount of propylene gas needs to be discharged to a torch inevitably, so that the propylene is seriously wasted, the unit consumption of finished products is increased, and the production cost is increased. In addition, the micro-moisture contained in the compressor system can freeze at low temperature, which seriously affects the safe and stable operation of the compressor.
Disclosure of Invention
The invention aims to provide equipment for preventing a propylene refrigeration compressor from being damaged at low temperature so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: propylene refrigeration compressor prevents
Cryogenic damage apparatus comprising:
the refrigerant storage tank is used for storing refrigerants;
the first compression device is used for compressing the refrigerant which is circulated by the first user;
the second compression device is used for compressing the refrigerant which is circulated by the user II;
the condenser is used for condensing the circulating refrigerant; the refrigerant storage tank, the first compression device, the second compression device and the condenser form a circulating condensation system; and
and the propylene vaporizer is communicated with the circulating system and the liquid phase propylene spherical tank, vaporizes propylene in a propylene spherical pipe in the liquid phase propylene spherical tank, and introduces the vaporized propylene into the circulating system for equipment protection.
Preferably, the first compressing device includes:
the high-pressure stage compressor is used for compressing the refrigerant which is circulated by a user,
and the high-pressure-stage refrigerant buffer tank is communicated with the high-pressure-stage compressor, the refrigerant storage tank and the condenser and is used for buffering the entering refrigerant.
Preferably, the second compressing device includes:
the low-pressure stage compressor is used for compressing the refrigerant after the second cycle of the user,
and the low-pressure stage refrigerant buffer tank is communicated with the low-pressure stage compressor and the high-pressure stage compressor and is used for buffering the entering refrigerant.
Preferably, the propylene vaporizer exchanges heat with low-pressure steam.
Preferably, when the propylene refrigeration compressor is started for the first time, the vacuum degree of the system is maintained at 5.33kPa, the gas-phase propylene from the vaporizer 1.5MPag is used for pressurizing the system to the pressure required by the starting condition, and then the refrigeration compressor is started;
after the compressor is normally started, the refrigerant is respectively supplied to refrigerant users from the refrigerant storage tank and the high-pressure-stage refrigerant buffer tank;
after heat exchange with a user, the refrigerant of the user I enters a high-pressure-stage refrigerant buffer tank, the refrigerant of the user II enters a low-pressure-stage refrigerant buffer tank, the refrigerant is compressed to 1.5MPag by a compressor, high-pressure gas is condensed in a condenser to be changed into a liquid phase, and the condensed liquid-phase propylene returns to a refrigerant storage tank for recycling.
Preferably, the pressure of the refrigerant entering the first user is 1.5MPag, and the temperature is 40 ℃.
Preferably, the temperature of the refrigerant after flashing in the first user is-2 ℃ and the pressure is 0.46 MPag.
Preferably, the pressure of the refrigerant entering the second user is 0.45MPag, and the temperature is-2 ℃.
Preferably, the temperature of the refrigerant after flashing in the second user is-40 ℃ and the pressure is 0.04 MPag.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts a method of directly starting the refrigeration compressor by conveying gas-phase propylene outside the system, and does not adopt a method of using propylene gas generated by flash evaporation of liquid propylene as a driving gas source, thereby avoiding the problems of discharge of propylene gas, icing of trace water in the system and the risk of damaging equipment at low temperature of the compressor system. The invention has the advantages that: simple structure, safety and reliability, good protectiveness and convenient popularization and implementation.
Drawings
FIG. 1 is a process flow of a device for preventing low temperature damage of a propylene refrigeration compressor;
in the figure, a refrigerant storage tank 1, a condenser 2, a low-pressure stage compressor 3, a high-pressure stage compressor 4, a low-pressure stage refrigerant buffer tank 5, a high-pressure stage refrigerant buffer tank 6, a propylene vaporizer 7 and a liquid-phase propylene spherical tank 8 are arranged.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, the present invention will now be described with reference to the accompanying drawings.
The low-temperature damage prevention equipment for the propylene refrigeration compressor provided by the embodiment of the invention is characterized by comprising the following components:
the refrigerant storage tank 1 is used for storing refrigerants;
the first compression device is used for compressing the refrigerant which is circulated by the first user;
the second compression device is used for compressing the refrigerant which is circulated by the user II;
a condenser 2 for condensing the circulating refrigerant; the refrigerant storage tank 1, the first compression device, the second compression device and the condenser 2 form a circulating condensation system; and
and the propylene vaporizer 7 is communicated with the circulating system and the liquid phase propylene spherical tank 8, vaporizes propylene in a propylene spherical pipe in the liquid phase propylene spherical tank 8, and introduces the vaporized propylene into the circulating system for equipment protection.
In one example of the present invention, the first compressing device includes:
a high-pressure stage compressor 4 for compressing the refrigerant after the first circulation of the user,
and the high-pressure-stage refrigerant buffer tank 6 is communicated with the high-pressure-stage compressor 4, the refrigerant storage tank 1 and the condenser 2 and is used for buffering the entering refrigerant.
In one example of the present invention, the second compressing device includes:
a low-pressure stage compressor 3 for compressing the refrigerant after the second circulation,
and the low-pressure stage refrigerant buffer tank 5 is communicated with the low-pressure stage compressor 3 and the high-pressure stage compressor 4 and is used for buffering the entering refrigerant.
In one embodiment of the present invention, the propylene vaporizer 7 exchanges heat with low-pressure steam.
In one example of the present invention, when the propylene refrigeration compressor is first powered on, the system vacuum is now maintained at 5.33kPa, the vapor phase propylene from the vaporizer 1.5MPag is used to pressurize the system to the pressure required for the start-up condition, at which time the refrigeration compressor is powered on;
after the compressor is normally started, the refrigerant is respectively supplied to refrigerant users from the refrigerant storage tank 1 and the high-pressure-stage refrigerant buffer tank 6;
after heat exchange with a user, the refrigerant of the user I enters a high-pressure-stage refrigerant buffer tank 6, the refrigerant of the user II enters a low-pressure-stage refrigerant buffer tank 5, the refrigerant is compressed to 1.5MPag by a compressor, high-pressure gas is condensed in a condenser 2 to become a liquid phase, and the condensed liquid-phase propylene returns to a refrigerant storage tank 1 for recycling.
In one embodiment of the present invention, the refrigerant entering the first user has a pressure of 1.5MPag and a temperature of 40 ℃.
In one embodiment of the present invention, the refrigerant after flashing in user one has a temperature of-2 ℃ and a pressure of 0.46 MPag.
In one embodiment of the present invention, the refrigerant entering the second user has a pressure of 0.45MPag and a temperature of-2 ℃.
In one embodiment of the present invention, the refrigerant after flash evaporation in the second user has a temperature of-40 ℃ and a pressure of 0.04 MPag.
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a low temperature damage equipment is prevented to propylene refrigeration compressor which characterized in that includes:
the refrigerant storage tank is used for storing refrigerants;
the first compression device is used for compressing the refrigerant which is circulated by the first user;
the second compression device is used for compressing the refrigerant which is circulated by the user II;
a condenser for condensing the circulating refrigerant; the refrigerant storage tank, the first compression device, the second compression device and the condenser form a circulating condensation system; and
and the propylene vaporizer is communicated with the circulating condensation system and is communicated with the liquid-phase propylene spherical tank, and is used for vaporizing propylene in the propylene spherical pipe in the liquid-phase propylene spherical tank and introducing the vaporized propylene into the circulating condensation system for equipment protection.
2. The apparatus of claim 1, wherein the first compression device comprises:
the high-pressure stage compressor is used for compressing the refrigerant which is circulated by a user,
and the high-pressure-stage refrigerant buffer tank is communicated with the high-pressure-stage compressor, the refrigerant storage tank and the condenser and is used for buffering the entering refrigerant.
3. The apparatus according to claim 2, wherein the second compression means comprises:
the low-pressure stage compressor is used for compressing the refrigerant after the second cycle of the user,
and the low-pressure stage refrigerant buffer tank is communicated with the low-pressure stage compressor and the high-pressure stage compressor and is used for buffering the entering refrigerant.
4. The apparatus of claim 1, wherein the propylene vaporizer exchanges heat with low-pressure steam.
5. The apparatus of claim 1, wherein the pressure of the refrigerant introduced into the first user is 1.5MPag and the temperature is 40 ℃.
6. The apparatus of claim 1, wherein the temperature of the refrigerant after flashing in the first user is-2 ℃ and the pressure is 0.46 MPag.
7. The apparatus of claim 1, wherein the pressure of the refrigerant introduced into the second refrigerant inlet is 0.45MPag and the temperature is-2 ℃.
8. The apparatus of claim 1, wherein the temperature of the refrigerant after flashing in the second user is-40 ℃ and the pressure is 0.04 MPag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020096413.5U CN212481743U (en) | 2020-01-16 | 2020-01-16 | Low-temperature damage prevention equipment for propylene refrigeration compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020096413.5U CN212481743U (en) | 2020-01-16 | 2020-01-16 | Low-temperature damage prevention equipment for propylene refrigeration compressor |
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| Publication Number | Publication Date |
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| CN212481743U true CN212481743U (en) | 2021-02-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121321A (en) * | 2020-01-16 | 2020-05-08 | 董国亮 | Low-temperature damage prevention equipment for propylene refrigeration compressor |
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- 2020-01-16 CN CN202020096413.5U patent/CN212481743U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111121321A (en) * | 2020-01-16 | 2020-05-08 | 董国亮 | Low-temperature damage prevention equipment for propylene refrigeration compressor |
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