CN209906670U - Recovery device for olefin alkane or hydrocarbon mixture - Google Patents
Recovery device for olefin alkane or hydrocarbon mixture Download PDFInfo
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- CN209906670U CN209906670U CN201920551121.3U CN201920551121U CN209906670U CN 209906670 U CN209906670 U CN 209906670U CN 201920551121 U CN201920551121 U CN 201920551121U CN 209906670 U CN209906670 U CN 209906670U
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Abstract
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture, wherein, recovery unit includes: a primary heat exchanger; the secondary heat exchanger is connected with the primary heat exchanger through a pipeline; the gas outlet of the first gas-liquid separator is connected with the inlet of the first expander, the outlet of the first expander is connected with the inlet of the second expander, the first pipeline passes through the secondary heat exchanger, the outlet of the second expander is connected with the first product output pipe, and the first product output pipe sequentially passes through the secondary heat exchanger and the primary heat exchanger. The technical scheme of the utility model simple structure, efficiency are higher, can be fine retrieve the olefin that the added value is high.
Description
Technical Field
The utility model relates to a chemical industry tail gas's recycle especially relates to a recovery unit of olefin alkane or hydrocarbon mixture.
Background
The polyolefin devices mainly refer to polyethylene and polypropylene, and with the continuous increase of polyolefin production capacity, higher requirements are also put on the waste gas treatment of the polyolefin devices. In any method, the polyolefin resin is degassed to remove the olefin monomers adhered to the particles or powder, and the part of the gas containing hydrocarbons and solid particles is called as polyolefin degassing tail gas.
At present, a large number of devices for preparing olefin from cracking gas and devices for preparing olefin from coal exist in China, and in the process of producing polyethylene and polypropylene through olefin polymerization reaction, in order to maintain the stability of each component of a polyethylene and polypropylene reactor and discharge materials, partial hydrocarbon-rich tail gas needs to be discharged at regular time, so that great waste is caused.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an efficiency is higher, can carry out the recovery unit of the alkene alkane or the hydrocarbon mixture that retrieve with the alkene that the added value is high.
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture, include:
the primary heat exchanger is used for cooling the feed gas and is connected with the feed gas input pipe;
the secondary heat exchanger is used for further cooling the feed gas and is connected with the primary heat exchanger through a pipeline;
the first gas-liquid separator is used for carrying out gas-liquid separation on the feed gas after being further cooled and cooled so as to separate a gas phase and a liquid phase from the feed gas, and is connected with the secondary heat exchanger through a pipeline;
the gas outlet of the first gas-liquid separator is connected with the inlet of a first expander used for reducing the temperature and pressure of gas in an expansion mode through a pipeline, the outlet of the first expander is connected with the inlet of a second expander used for reducing the temperature and pressure of gas in an expansion mode through a first pipeline, the first pipeline passes through a second-stage heat exchanger, so that the gas in the first pipeline is expanded, reduced in temperature and pressure by the second expander after being reheated, the outlet of the second expander is connected with a first product output pipe, and the first product output pipe sequentially passes through the second-stage heat exchanger and a first-stage heat exchanger, so that the gas in the first product output pipe is reheated.
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture, wherein, the second tube coupling is passed through with second vapour and liquid separator's entry to first vapour and liquid separator's liquid phase export, the second pipeline passes through second grade heat exchanger, one-level heat exchanger in proper order, so that liquid rewarming in the second pipeline, second vapour and liquid separator's liquid phase export and second product output tube connection.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the feed gas input tube is connected with the one-level heat exchanger behind the compressor, second vapour and liquid separator's gaseous phase export is connected with the feed gas input tube, second vapour and liquid separator's gaseous phase export is located between compressor and the one-level heat exchanger with the tie point of feed gas input tube, so that the gaseous phase that second vapour and liquid separator separates joins with the feed gas.
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture, wherein, install the booster pump on the second pipeline, the booster pump is installed between first vapour and liquid separator's liquid phase export and second grade heat exchanger.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, still include: the refrigerating system comprises a refrigerating compressor and a throttling valve, wherein an outlet of the refrigerating compressor is communicated with an inlet of the throttling valve through a third pipeline, an outlet of the throttling valve is communicated with an inlet of the refrigerating compressor through a fourth pipeline, a refrigerant circulates between the throttling valve and the refrigerating compressor, and the third pipeline passes through a first-stage heat exchanger to provide cold energy for the first-stage heat exchanger.
The technical scheme of the utility model simple structure, efficiency are higher, can be fine retrieve the olefin that the added value is high.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for recovering an olefin hydrocarbon or a mixture of hydrocarbons according to the present invention.
Detailed Description
As shown in fig. 1, the utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, include:
the primary heat exchanger E1 is used for cooling the feed gas and is connected with the feed gas input pipe;
the secondary heat exchanger E2 is used for further cooling the feed gas and is connected with the primary heat exchanger through a pipeline;
the first gas-liquid separator V1 is used for carrying out gas-liquid separation on the feed gas after being further cooled and cooled so as to separate a gas phase and a liquid phase from the feed gas, and is connected with the secondary heat exchanger E2 through a pipeline;
the gas outlet of the first gas-liquid separator V1 is connected with the inlet of a first expander ET1 for reducing the temperature and pressure of gas in an expansion mode through a pipeline, the outlet of the first expander ET1 is connected with the inlet of a second expander ET2 for reducing the temperature and pressure of gas in an expansion mode through a first pipeline 10, the first pipeline 10 passes through a second-stage heat exchanger E2, so that the gas in the first pipeline 10 is reheated and then expanded by a second expander ET2 for reducing the temperature and pressure, the outlet of the second expander is connected with a first product output pipe, and the first product output pipe sequentially passes through the second-stage heat exchanger E2 and a first-stage heat exchanger E1, so that the gas in the first product output pipe is reheated.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the liquid phase export of first vapour and liquid separator V1 is passed through second pipeline 20 with the entry of second vapour and liquid separator V2 and is connected, and second pipeline 20 passes through second grade heat exchanger E2, one-level heat exchanger E1 in proper order to make the liquid rewarming in the second pipeline 20, second vapour and liquid separator V2's liquid phase export and second product output tube connection.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the feed gas input tube is connected with one-level heat exchanger E1 behind compressor B1, and second vapour and liquid separator V2's gaseous phase export is connected with the feed gas input tube, and the gaseous phase export of second vapour and liquid separator V2 is located between compressor B1 and one-level heat exchanger E1 with the tie point of feed gas input tube to make the gaseous phase that second vapour and liquid separator separates converge with the feed gas.
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture, wherein, install booster pump P1 on the second pipeline 20, booster pump P1 installs between first vapour and liquid separator's liquid phase export and second grade heat exchanger.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, still include: the refrigeration system comprises a refrigeration compressor B2 and a throttle valve V10, wherein the outlet of the refrigeration compressor is communicated with the inlet of the throttle valve through a third pipeline 30, the outlet of the throttle valve is communicated with the inlet of the refrigeration compressor through a fourth pipeline 40, a refrigerant circulates between the throttle valve and the refrigeration compressor, and the third pipeline passes through a first-stage heat exchanger to provide refrigeration capacity for the first-stage heat exchanger.
The technical scheme of the utility model simple structure, efficiency are higher, can be fine retrieve the olefin that the added value is high.
The technical scheme of the utility model relates to a recovery unit of olefin alkane or hydrocarbon mixture. The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture's main equipment has: compressors, refrigerators, expanders, heat exchangers, separators, pumps, valves and associated piping.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture is in operation, the feed gas that comes from the boundary area is after the compressor pressure boost, get into one-level heat exchanger E1 and second grade heat exchanger E2 after the cooling, get into first vapour and liquid separator V1, separate gaseous phase and liquid phase material, the liquid phase material of separation, through the pump pressure boost, get into second grade heat exchanger E2 and first-level heat exchanger E1 after rewarming, get into second vapour and liquid separator V2, the liquid phase product output of separation, gaseous phase and feed gas converge, the gaseous phase material of first vapour and liquid separator V1 separation gets into first expander ET1, carry out the inflation cooling step-down, after second grade heat exchanger E2 rewarming, get into second expander ET2 again, after the inflation cooling step-down, send out tail gas component after the heat exchanger rewarming, refrigeration compressor B2 is after refrigerant pressure boost and cooling, after throttle valve V10 throttle cooling step-down, the cold energy is provided for the primary heat exchanger E1, and the cold energy is returned to the inlet of the refrigeration compressor B2 after being reheated by the primary heat exchanger E1.
The utility model discloses a recovery unit of alkene alkane or hydrocarbon mixture make full use of feed gas self pressure energy through the expansion cooling, for the separation of feed gas provides cold volume, only needs the refrigerator to provide a small amount of cold volume. The utility model discloses a recovery process of olefin alkane or hydrocarbon mixture can also reduce running cost and equipment investment when simplifying process flow.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the compressor can be reciprocating compressor, screw compressor or centrifugal compressor.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the heat exchanger can be plate fin heat exchanger or wound tube heat exchanger.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the expander can be turbine type expander, screw expander or piston expander.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the refrigeration compressor can be screw compressor, reciprocating compressor or centrifugal compressor.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture, wherein, the refrigerant that the refrigeration compressor used can be the arbitrary combination of freon R22, R134a, ammonia, propane, propylene, ethane, ethylene.
The utility model discloses a recovery unit of olefin alkane or hydrocarbon mixture's working example as follows:
the temperature of raw material gas from a boundary area is 40 ℃, the pressure is 1.4bar (g), the raw material gas is compressed by a compressor in two stages and is pressurized to 13bar (g), the raw material gas is sequentially cooled to-130 ℃ by a first-stage heat exchanger E1 and a second-stage heat exchanger E2, enters a first gas-liquid separator V1, gas phase and liquid phase materials are separated, the separated liquid phase materials are pressurized to 30bar (g) by a booster pump P1, enter a second-stage heat exchanger E2 and a first-stage heat exchanger E1 for reheating to normal temperature and then enter a second gas-liquid separator V2, separated liquid phase products are output, the gas phase and the raw material gas are converged, the gas phase materials separated by the first gas-liquid separator V1 enter a first expander ET1 for expansion, temperature and pressure reduction, the gas phase materials enter a second expander E2 for reheating, then enter a second expander ET2 for expansion, temperature.
The refrigerant is pressurized to 16bar (g) by the refrigeration compressor B2 and cooled, and then throttled by the throttle valve V10, cooled and depressurized to 2.6bar (g), so that cold energy is provided for the primary heat exchanger E1, and the refrigerant returns to the inlet of the refrigeration compressor B2 after being reheated by the heat exchanger.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. An apparatus for recovering an olefin alkane or a mixture of hydrocarbons, comprising:
the primary heat exchanger is used for cooling the feed gas and is connected with the feed gas input pipe;
the secondary heat exchanger is used for further cooling the feed gas and is connected with the primary heat exchanger through a pipeline;
the first gas-liquid separator is used for carrying out gas-liquid separation on the feed gas after being further cooled and cooled so as to separate a gas phase and a liquid phase from the feed gas, and is connected with the secondary heat exchanger through a pipeline;
the gas outlet of the first gas-liquid separator is connected with the inlet of a first expander used for reducing the temperature and pressure of gas in an expansion mode through a pipeline, the outlet of the first expander is connected with the inlet of a second expander used for reducing the temperature and pressure of gas in an expansion mode through a first pipeline, the first pipeline passes through a second-stage heat exchanger, so that the gas in the first pipeline is expanded, reduced in temperature and pressure by the second expander after being reheated, the outlet of the second expander is connected with a first product output pipe, and the first product output pipe sequentially passes through the second-stage heat exchanger and a first-stage heat exchanger, so that the gas in the first product output pipe is reheated.
2. The apparatus for recovering an olefin alkane or a hydrocarbon mixture as claimed in claim 1, wherein the liquid phase outlet of the first gas-liquid separator is connected to the inlet of the second gas-liquid separator through a second pipeline, the second pipeline passes through the secondary heat exchanger and the primary heat exchanger in sequence to rewet the liquid in the second pipeline, and the liquid phase outlet of the second gas-liquid separator is connected to the second product outlet pipe.
3. The apparatus for recovering an olefin alkane or a hydrocarbon mixture according to claim 2, wherein the raw material gas input pipe is connected to the first-stage heat exchanger after passing through the compressor, the gas phase outlet of the second gas-liquid separator is connected to the raw material gas input pipe, and a connection point of the gas phase outlet of the second gas-liquid separator and the raw material gas input pipe is located between the compressor and the first-stage heat exchanger, so that the gas phase separated by the second gas-liquid separator joins the raw material gas.
4. The apparatus for recovering an olefin alkane or a hydrocarbon mixture as claimed in claim 3, wherein a booster pump is installed on the second line, and the booster pump is installed between the liquid phase outlet of the first gas-liquid separator and the secondary heat exchanger.
5. The apparatus for recovering an olefin alkane or a mixture of hydrocarbons as claimed in claim 4, further comprising: the refrigerating system comprises a refrigerating compressor and a throttling valve, wherein an outlet of the refrigerating compressor is communicated with an inlet of the throttling valve through a third pipeline, an outlet of the throttling valve is communicated with an inlet of the refrigerating compressor through a fourth pipeline, a refrigerant circulates between the throttling valve and the refrigerating compressor, and the third pipeline passes through a first-stage heat exchanger to provide cold energy for the first-stage heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920551121.3U CN209906670U (en) | 2019-04-22 | 2019-04-22 | Recovery device for olefin alkane or hydrocarbon mixture |
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| CN201920551121.3U CN209906670U (en) | 2019-04-22 | 2019-04-22 | Recovery device for olefin alkane or hydrocarbon mixture |
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| CN209906670U true CN209906670U (en) | 2020-01-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115523004A (en) * | 2022-10-18 | 2022-12-27 | 北京百利时能源技术股份有限公司 | Amine process CO 2 Process medium heat energy recovery combined power generation device and method in trapping device |
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2019
- 2019-04-22 CN CN201920551121.3U patent/CN209906670U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115523004A (en) * | 2022-10-18 | 2022-12-27 | 北京百利时能源技术股份有限公司 | Amine process CO 2 Process medium heat energy recovery combined power generation device and method in trapping device |
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