CN216481789U - Refrigeration pressure relief system of alkylation reaction - Google Patents
Refrigeration pressure relief system of alkylation reaction Download PDFInfo
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- CN216481789U CN216481789U CN202122585276.9U CN202122585276U CN216481789U CN 216481789 U CN216481789 U CN 216481789U CN 202122585276 U CN202122585276 U CN 202122585276U CN 216481789 U CN216481789 U CN 216481789U
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 22
- 238000005804 alkylation reaction Methods 0.000 title claims abstract description 13
- 239000003507 refrigerant Substances 0.000 claims abstract description 51
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 7
- 230000003139 buffering effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 22
- 239000001294 propane Substances 0.000 description 11
- 238000007599 discharging Methods 0.000 description 5
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000029936 alkylation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000001282 iso-butane Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model discloses a refrigeration and pressure relief system for alkylation reaction, which comprises a reactor body, a refrigeration unit and a buffer pressure relief unit, wherein the refrigeration unit comprises a flash tank, a condensate tank, a compressor and an air cooler which are sequentially connected, and the flash tank is communicated with the reactor body; the buffering pressure release unit comprises a cryogen buffer tank, a storage spherical tank and a throwing cryogen pump, wherein a torch pipeline, a cryogen pipeline, a discharge pipeline, an external throwing cryogen pipeline, a pressure measurement pipeline and a pressure release pipeline are communicated with the cryogen buffer tank through communication, the cryogen pipeline is communicated with an air cooler, the discharge pipeline is communicated with a flash tank, a pressure transmitter is arranged on the pressure measurement pipeline, a pneumatic regulating valve is arranged on the pressure release pipeline and communicated with the storage spherical tank, the throwing cryogen pump is arranged on the external throwing cryogen pipeline, and the external throwing cryogen pipeline is communicated with a treatment tower. The utility model realizes the automatic pressure relief process of the refrigerant buffer tank and realizes the recycling of resources.
Description
Technical Field
The utility model relates to the technical field of alkylation processing, in particular to a refrigeration pressure relief system for alkylation reaction.
Background
The feeding temperature of the alkylation reactor is required to be 4-12 ℃, the temperature is realized by mixing low-temperature circulating refrigerant in the feeding of the reactor, the gas phase sucked into the top of the flash tank is used as the refrigerant, and the main components of isobutane and a small amount of propane are contained.
At present, in order to solve the problem, an external refrigerant throwing method is adopted, namely, a part of refrigerant is thrown to a depropanizer externally to carry out propane separation again, so that the content of propane in the refrigerant is reduced, and the pressure of a refrigerant buffer tank is reduced.
However, in the real-time production process, especially in summer when the light component removal tower is unstable in operation, under the condition that the external refrigerant throwing is continuously carried out, the propane content in the refrigerant is still higher, the pressure of the refrigerant buffer tank is always higher, the stability of the operation of the refrigeration compressor is influenced, at this time, the pressure of the refrigerant buffer tank is reduced by opening the flame releasing torch regulating valve of the refrigerant buffer tank to release the pressure through the flame releasing torch, the stable operation of the refrigerant system is maintained, but in this way, a large amount of liquefied gas is released to the flame to burn, and a large amount of waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a refrigeration pressure relief system for alkylation reaction, which solves the problems in the prior art.
In order to achieve the purpose, the utility model provides the following technical scheme: a refrigeration and pressure relief system for alkylation reaction comprises a reactor body, a refrigeration unit and a buffer pressure relief unit, wherein the refrigeration unit comprises a flash tank, a condensate tank, a compressor and an air cooler which are sequentially connected, and the flash tank is communicated with the reactor body; the buffering pressure release unit comprises a cryogen buffer tank, a storage spherical tank and a throwing cryogen pump, wherein a torch pipeline, a cryogen pipeline, a discharge pipeline, an external throwing cryogen pipeline, a pressure measurement pipeline and a pressure release pipeline are communicated with the cryogen buffer tank through communication, the cryogen pipeline is communicated with an air cooler, the discharge pipeline is communicated with a flash tank, a pressure transmitter is arranged on the pressure measurement pipeline, a pneumatic regulating valve is arranged on the pressure release pipeline and communicated with the storage spherical tank, the throwing cryogen pump is arranged on the external throwing cryogen pipeline, and the external throwing cryogen pipeline is communicated with a treatment tower.
In several embodiments, the pneumatic control valve is disposed between the pressure measurement pipeline and the pressure relief pipeline, and the opening pressure value of the pneumatic control valve is greater than the pressure value of the refrigerant buffer tank in normal operation.
In several embodiments, a first discharge pipe is arranged at the bottom of the flash tank, the first discharge pipe is communicated with the reactor body, and a refrigerant pump is arranged on the first discharge pipe.
In several embodiments, the flash tank top is provided with the second discharging pipe, the second discharging pipe is linked together with the condensate tank, the condensate tank top is provided with the condensate discharging pipe, the condensate discharging pipe is linked together with the compressor.
In several embodiments, the compressor is provided with a main discharge pipe, the main discharge pipe is communicated with two discharge pipes, one discharge pipe is communicated with the flash tank, and the other discharge pipe is provided with an air cooler and is communicated with the refrigerant pipeline.
The utility model has the technical effects and advantages that:
the utility model realizes the transfer process of the refrigerant among the reactor body, the refrigeration unit and the buffering pressure relief unit, realizes the automatic pressure relief process of the refrigerant buffer tank through the buffering pressure relief unit, and recycles the discharged materials to realize the recycling of resources.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is an enlarged schematic view of the buffer pressure relief unit shown in FIG. 1;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The utility model provides a refrigeration pressure relief system for alkylation reaction, which mainly comprises a reactor body 100, a refrigeration unit 200 and a buffer pressure relief unit 300, wherein the refrigeration unit 200 comprises a flash tank 210, a condensate tank 220, a compressor 230 and an air cooler 240 which are sequentially connected, the flash tank 210 is communicated with the reactor body 100, the flash tank 210 is used for providing space for rapid fluid vaporization and vapor-liquid separation, the condensate tank 220 is used for carrying out condensate separation on gas phase, the compressor 230 is used for compressing, and then the air cooler 240 is used for carrying out condensation cooling.
Specifically, a first discharge pipe 211 is arranged at the bottom of the flash tank 210, the first discharge pipe 211 is communicated with the reactor body 100, a refrigerant pump 212 is arranged on the first discharge pipe 211, and a refrigerant which is subjected to pressure reduction flash evaporation and then cooled in the flash tank 210 is pumped by the refrigerant pump 212 and sent to an olefin feeding inlet of the reactor body 100 for circulation.
Correspondingly, a second discharge pipe 213 is arranged at the top of the flash tank 210, the second discharge pipe 213 is communicated with a condensate tank 220, a condensate discharge pipe 221 is arranged at the top of the condensate tank 220, the condensate discharge pipe 221 is communicated with a compressor 230, and the compressor 230 leads out a gas phase at the top of the flash tank 210 from the second discharge pipe 212 to the condensate tank 220 and then the gas phase enters the compressor for compression.
Meanwhile, the main discharge pipe 231 is arranged on the compressor 230, the main discharge pipe 231 is communicated with two discharge pipes 232, one discharge pipe 232 is communicated with the flash tank 210, and the other discharge pipe 232 is provided with an air cooler 240 and is communicated with the refrigerant pipeline 312, so that when the pressure bearing capacity of the refrigerant buffer tank 310 reaches the limit or the refrigerant buffer tank cannot be used suddenly, the discharge pipe communicated with the flash tank can be opened, the material returning process is realized, and the safety is ensured.
Specifically, the buffering pressure-releasing unit 300 includes a refrigerant buffer tank 310, a storage spherical tank 320 and a refrigerant-throwing pump 330, the refrigerant buffer tank 310 is provided with a torch pipeline 311, a refrigerant pipeline 312, a discharge pipeline 313, an external refrigerant-throwing pipeline 314, a pressure measurement pipeline 315 and a pressure-releasing pipeline 316 in a communicating manner, the refrigerant pipeline 312 is communicated with the air cooler 240, the discharge pipeline 313 is communicated with the flash tank 210, the pressure measurement pipeline 315 is provided with a pressure transmitter 301, the pressure-releasing pipeline 316 is provided with a pneumatic regulating valve 302 and is communicated with the storage spherical tank 320, the refrigerant-throwing pump 330 is arranged on the external refrigerant-throwing pipeline 314, the external refrigerant-throwing pipeline 314 is communicated with a treatment tower, and the treatment tower is a depropanizer in cooperation with the depropanizer to separate propane, so as to reduce the propane content in the refrigerant, thereby reducing the pressure of the refrigerant buffer tank.
Wherein the pneumatic control valve 302 is disposed between a pressure measurement line 315 and a pressure relief line 316, the opening pressure value of the pneumatic adjusting valve 302 is greater than the pressure value of the refrigerant buffer tank 310 in normal operation, and the pneumatic adjusting valve 320, the pressure of the refrigerant buffer is adjusted in cascade, the flow of the refrigerant buffer tank 310 to the air phase line of the storage spherical tank 320 is opened, the opening pressure of the pneumatic adjusting valve 302 is slightly higher than the normal operating pressure, therefore, when the content of propane in the refrigerant system is relatively high, the external throwing effect is not obvious, and the pressure of the refrigerant buffer tank 310 reaches the set opening value of the pneumatic regulating valve 302, the pneumatic regulating valve 302 is slowly opened to release the pressure to the raw material storage spherical tank 320, the pressure of the refrigerant buffer tank 310 is maintained at a stable value through the self-regulation of the pneumatic regulating valve 302, and the propane discharged into the storage spherical tank 320 area is slowly taken away along with the loading and unloading process of the liquefied gas, so that accumulation is not formed.
The specific flow of the system is as follows:
the feeding temperature of the reactor body 100 is required to be 4-12.0 ℃, the temperature is realized by mixing a low-temperature circulating refrigerant in the feeding of the reactor body, in addition, in order to achieve the balance of the feeding and discharging amount of propane and isobutane in an alkylation device and especially prevent the accumulation of propane in equipment in the device, a pumped propane material flow is led out from a refrigeration part and sent to a depropanizing tower for separation, and in order to avoid overlarge pressure and resource waste, a pressure relief structure is required for pressure relief and recovery.
Firstly, a compressor 230 is matched with a second discharge pipe to suck a gas phase at the top of a flash tank D-401 as a refrigerant, after a condensate is separated from a condensate tank 220 at the inlet of the compressor 230, the gas phase enters the compressor 230 and is compressed to 0.6Mpa, then the gas phase is condensed and cooled by an air cooler 240 of the refrigerant and enters a refrigerant buffer tank 310 through a discharge pipe, most of the liquid discharged from the refrigerant buffer tank 310 returns to the flash tank again through a discharge pipe 313, the temperature of the refrigerant is reduced to about minus 10 ℃ through pressure reduction flash evaporation, and the liquid is pumped out by a refrigerant pump 212 and is matched with a first discharge pipe 211 to be conveyed to an olefin feeding inlet of a reactor body for circulation; a small part of hydrocarbon liquid in the refrigerant buffer tank 310 is used as an external throwing refrigerant and is sent out by an external throwing refrigerant pump 314 through pressure boosting, and the external throwing refrigerant enters a depropanizing tower for depropanizing treatment after alkali washing; when the operating pressure continuously rises to break through the set value of the pneumatic control valve 302, the pneumatic control valve 302 is opened to release the pressure, and the refrigerant overpressure part enters the storage ball tank 320 to be released and recovered.
Each line is further provided with an electromagnetic valve or a manual valve to open and close the line.
The components not described in the specification are all conventional components in the field, and are not further limited herein.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (5)
1. A refrigeration pressure relief system for alkylation reaction is characterized by comprising a reactor body, a refrigeration unit and a buffer pressure relief unit, wherein,
the refrigeration unit comprises a flash tank, a condensate tank, a compressor and an air cooler which are connected in sequence, and the flash tank is communicated with the reactor body;
the buffering pressure release unit comprises a cryogen buffer tank, a storage spherical tank and a throwing cryogen pump, wherein a torch pipeline, a cryogen pipeline, a discharge pipeline, an external throwing cryogen pipeline, a pressure measurement pipeline and a pressure release pipeline are communicated with the cryogen buffer tank through communication, the cryogen pipeline is communicated with an air cooler, the discharge pipeline is communicated with a flash tank, a pressure transmitter is arranged on the pressure measurement pipeline, a pneumatic regulating valve is arranged on the pressure release pipeline and communicated with the storage spherical tank, the throwing cryogen pump is arranged on the external throwing cryogen pipeline, and the external throwing cryogen pipeline is communicated with a treatment tower.
2. The refrigeration and pressure relief system for alkylation reaction according to claim 1, wherein the pneumatic control valve is disposed between the pressure measurement pipeline and the pressure relief pipeline, and the opening pressure value of the pneumatic control valve is greater than the normal operating pressure value of the refrigerant buffer tank.
3. The system according to claim 1, wherein a first discharge pipe is disposed at the bottom of the flash tank, the first discharge pipe is in communication with the reactor body, and a refrigerant pump is disposed on the first discharge pipe.
4. The refrigeration and pressure relief system of alkylation reaction according to claim 1, wherein a second discharge pipe is arranged at the top of the flash tank and communicated with a condensate tank, and a condensate discharge pipe is arranged at the top of the condensate tank and communicated with a compressor.
5. A refrigeration pressure relief system according to claim 4, wherein the compressor is provided with a main discharge pipe, said main discharge pipe being in communication with two offtake pipes, one of said offtake pipes being in communication with the flash tank, the other of said offtake pipes being provided with an air cooler and being in communication with the refrigerant line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122585276.9U CN216481789U (en) | 2021-10-26 | 2021-10-26 | Refrigeration pressure relief system of alkylation reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122585276.9U CN216481789U (en) | 2021-10-26 | 2021-10-26 | Refrigeration pressure relief system of alkylation reaction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216481789U true CN216481789U (en) | 2022-05-10 |
Family
ID=81443085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122585276.9U Active CN216481789U (en) | 2021-10-26 | 2021-10-26 | Refrigeration pressure relief system of alkylation reaction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216481789U (en) |
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2021
- 2021-10-26 CN CN202122585276.9U patent/CN216481789U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240325 Address after: No. 88, Dongfang Avenue, Zhapu Town, Jiaxing City, Zhejiang Province, 314201 Patentee after: ZHEJIANG MEIFU PETROLEUM CHEMICAL CO.,LTD. Country or region after: China Address before: 314000 floor 2, building 3, No. 988, Yashan West Road, gangang District, Jiaxing City, Zhejiang Province Patentee before: Zhejiang maidui Technology Co.,Ltd. Country or region before: China |