CN214582078U - FLNG mixed refrigerant recycling, storing and component adjusting device - Google Patents
FLNG mixed refrigerant recycling, storing and component adjusting device Download PDFInfo
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- CN214582078U CN214582078U CN202120368424.9U CN202120368424U CN214582078U CN 214582078 U CN214582078 U CN 214582078U CN 202120368424 U CN202120368424 U CN 202120368424U CN 214582078 U CN214582078 U CN 214582078U
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 81
- 238000004064 recycling Methods 0.000 title claims description 5
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims description 40
- 239000007791 liquid phase Substances 0.000 claims description 14
- 239000012071 phase Substances 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 12
- DDTVVMRZNVIVQM-UHFFFAOYSA-N 2-(1-azabicyclo[2.2.2]octan-3-yloxy)-1-cyclopentyl-1-phenylethanol;hydrochloride Chemical group Cl.C1N(CC2)CCC2C1OCC(O)(C=1C=CC=CC=1)C1CCCC1 DDTVVMRZNVIVQM-UHFFFAOYSA-N 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract 1
- 239000007792 gaseous phase Substances 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 239000007789 gas Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 14
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003949 liquefied natural gas Substances 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
- F25J1/0055—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream originating from an incorporated cascade
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0244—Operation; Control and regulation; Instrumentation
- F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
- F25J1/0248—Stopping of the process, e.g. defrosting or deriming, maintenance; Back-up mode or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0244—Operation; Control and regulation; Instrumentation
- F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
- F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
- F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
- F25J1/0277—Offshore use, e.g. during shipping
- F25J1/0278—Unit being stationary, e.g. on floating barge or fixed platform
Abstract
The utility model discloses a mixed cryogen of FLNG retrieves storage and component adjusting device, including compressor, cooler, vapour and liquid separator, the heat exchanger of the multiple-strand flow, knockout tower, storage tank and relevant connecting line, valve etc. compress, separate out partial heavy ends after cooling mixed cryogen earlier, the gaseous phase separates into light components and heavy ends two parts through cryrogenic, rectification again, only retrieves the heavy ends when retrieving mixed cryogen, sends the heavy ends back to mixed cryogen system through the pipeline when restarting again, and the light components is supplemented by BOG; and adjusting the temperature and pressure of the rectifying tower according to requirements when adjusting the mixed refrigerant, and separating out the required components. The device only retrieves can not be self-supporting, the heavy component of high price, very big reduction mixed refrigerant storage space, simultaneously can convenient and fast realize the component adjustment of mixed refrigerant, have fabulous economic nature, especially adapted space requires extremely high FLNG.
Description
Technical Field
The utility model relates to a cryogen is retrieved and is saved and component adjusting device especially relates to a mixed cryogen of FLNG retrieves and saves and component adjusting device, belongs to ocean engineering and new forms of energy technical field.
Background
FLNG is the production of collection marine liquefied natural gas, stores, loading and unloading and outward transport novel floating production storage unloading device as an organic whole, and the exploitation of being applied to marine gas field has characteristics such as investment cost is low, construction period is short, the development risk is little, be convenient for the migration and the security is high, has received much attention in recent years. FLNG typically employs a mixed refrigerant refrigeration process to condense natural gas into LNG. The mixed refrigerant generally consists of light components of nitrogen, methane and heavy components of ethane, ethylene, propane, propylene, butane and pentane. The mixed refrigerant system is a closed circulation system, only a small amount of supplement is needed during normal operation, but the mixed refrigerant in the system needs to be recycled and stored before parking and maintenance.
The natural gas liquefaction device on land usually discharges the mixed refrigerant directly to the mixed refrigerant storage tank, and the mixed refrigerant is retrieved incompletely, and the mixed refrigerant storage tank volume that needs is very big. It cannot be applied to FLNG, which has extremely high requirements for space.
Meanwhile, in actual production, the components of the mixed refrigerant need to be adjusted according to the components of the natural gas inlet, and most of the existing devices are operated in a mode of discharging part of the mixed refrigerant and then supplementing a single component, so that the loss of the mixed refrigerant is caused, and the operation cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that realize on FLNG to mix the recovery storage of cryogen and carry out the component adjustment to mixing the cryogen according to the production needs.
In order to solve the technical problem, the device for recycling, storing and adjusting components of mixed refrigerant of FLNG comprises a compressor, wherein an inlet of the compressor is connected to a first mixed refrigerant separating tank in a mixed refrigerant circulating system through a pipeline, an outlet of the compressor is connected to a cooler through a pipeline, the cooler is connected to a gas-liquid separator through a pipeline, a liquid phase port of the gas-liquid separator is connected to a first storage tank through a pipeline, a gas phase port of the gas-liquid separator is connected to a first strand loop in a multi-strand heat exchanger through a pipeline, the first strand loop is connected to a feeding port in the middle of a separating tower through a pipeline, a gas phase port of the gas-liquid separator is connected to a second strand loop in the multi-strand heat exchanger through a second pipeline, the second strand loop is connected to a condenser at the top of the separating tower through a pipeline, and the condenser is connected to a third strand loop in the multi-strand heat exchanger through a pipeline, the third loop is connected to the inlet of the compressor through a pipeline; the top of the separation tower is connected to a fourth circuit in the multi-flow heat exchanger through a pipeline, and the fourth circuit is connected to an inlet separation tank of a mixed refrigerant compressor in the mixed refrigerant system through a pipeline; the bottom of the separation column is connected to a second storage tank through a pipeline.
In the technical scheme, the liquid phase port of the gas-liquid separator is connected to the second mixed refrigerant separating tank in the mixed refrigerant system through a pipeline.
In the above technical solution, the fourth loop is connected to the outside through a pipeline.
In the technical scheme, the liquid phase port of the gas-liquid separator is connected with the feed inlet in the middle of the separation tower through a pipeline, the outlet of the compressor is connected to the reboiler at the bottom of the separation tower through a pipeline, and the reboiler is connected to the gas-liquid separator through a pipeline.
In the above technical scheme, the bottom of the separation tower is connected to a third mixed refrigerant separation tank in the mixed refrigerant system through a pipeline.
In the above technical scheme, the first storage tank and the second storage tank are connected through a pipeline.
In the technical scheme, each section of pipeline is provided with a valve.
In the above technical scheme, the compressor is a screw compressor, a reciprocating compressor or a diaphragm compressor.
In the above technical scheme, the multi-stream heat exchanger is a PCHE heat exchanger or a plate-fin heat exchanger.
The FLNG mixed refrigerant recycling, storing and component adjusting device has the following advantages.
1. When the mixed refrigerant is recycled, the light components and the heavy components are separated, the heavy components which cannot be self-supplied and have higher value are only stored, and meanwhile, the mixed refrigerant is pressurized and stored, so that the volume of the mixed refrigerant storage tank is greatly reduced, and the occupied space is reduced.
2. The light components are used for replacement when the mixed refrigerant is recycled, heavy components are recycled to the maximum extent, the loss of the heavy components of the mixed refrigerant is reduced, and the operation cost is reduced.
3. When the mixed refrigerant is adjusted, the components to be adjusted are accurately fractionated by using the rectifying tower, the components are adjusted more accurately, meanwhile, the loss of heavy components is avoided, and the supplement cost of the mixed refrigerant is reduced.
4. The mixed refrigerant components are accurately separated by rectification, and are adjusted more quickly, so that the energy consumption of a mixed refrigerant circulating system can be quickly and effectively reduced, and the production cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of a mixed refrigerant recovery storage and composition adjustment device for FLNG.
Detailed Description
Referring to fig. 1, the mixed refrigerant recovery, storage and composition adjusting device comprises a compressor 1, wherein an inlet of the compressor is connected to a first mixed refrigerant separating tank in a mixed refrigerant circulating system 8 through a pipeline provided with a twelfth valve V12, an outlet of the compressor is connected to a cooler 2 through a pipeline, and the cooler 2 is connected to a gas-liquid separator 3 through a pipeline.
The liquid phase port of the gas-liquid separator is connected to the first storage tank 5 through a pipeline provided with a fourth valve V4 and a ninth valve V9; the liquid phase port of the gas-liquid separator is connected to a second mixed refrigerant separating tank in the mixed refrigerant system 8 through a pipeline provided with a sixth valve V6; and a liquid phase port of the gas-liquid separator is connected to a feed port in the middle of the separation tower 4 through a pipeline provided with a fourteenth valve V14.
A gas phase port of the gas-liquid separator is connected to a first loop in the multi-stream heat exchanger 7 through a pipeline provided with a seventeenth valve V17, and the first loop is connected to a feed inlet in the middle of the separation tower 4 through a pipeline provided with a fifteenth valve V15; the gas phase port of the gas-liquid separator is connected to a second return circuit in the multi-flow heat exchanger 7 through a pipeline provided with a sixteenth valve V16, the second return circuit is connected to a condenser 41 at the top of the separation tower through a pipeline provided with a third valve V3, the condenser 41 is connected to a third return circuit in the multi-flow heat exchanger 7 through a pipeline, and the third return circuit is connected to the inlet of the compressor through a pipeline.
The top of the separation tower is connected to a fourth loop in the multi-stream heat exchanger 7 through a pipeline provided with a fifth valve V5, the fourth loop is connected to an inlet separation tank of a mixed refrigerant compressor in the mixed refrigerant system 8 through a pipeline provided with a second valve V2, and the fourth loop is connected to the outside through a pipeline provided with a first valve V1.
The compressor outlet is connected to the separation column bottom reboiler 42 through a pipe line equipped with a thirteenth valve V13, and the reboiler 42 is connected to the gas-liquid separator 3 through a pipe line.
The bottom of the separation tower is connected to a third mixed refrigerant separation tank in the mixed refrigerant system 8 through a pipeline provided with a seventh valve V7; the bottom of the separation column is connected to the second storage tank 6 through a pipe provided with an eighth valve V8 and an 11 th valve V11; the pipeline between the eighth valve V8 and the 11 th valve V11 and the pipeline between the fourth valve V4 and the ninth valve V9 are connected through a pipeline provided with a tenth valve V10.
The first storage tank 5 and the second storage tank 6 can respectively recover heavy components in the mixed refrigerant separated by the gas-liquid separator 3 and the separation tower 4, and the components of the heavy components separated by the first storage tank and the second storage tank are different. The connection between the first tank 5 and the second tank 6 via the tenth valve V10 allows switching between the two tanks.
And (3) recovering a mixed refrigerant working mode:
when the mixed refrigerant system 8 is stopped, a twelfth valve V12 is opened, the compressor 1 is started, the mixed refrigerant is compressed, cooled to normal temperature through the cooler 2 and then sent to the gas-liquid separator 3, the separated liquid phase is sent to the first storage tank 5, the separated gas phase is divided into two parts and sent to the first loop and the second loop in the multi-stream heat exchanger 7, the two parts are input to the condenser 41 through the second loop, throttled and cooled and then returned to the third loop in the multi-stream heat exchanger 7, the liquid phase returns to the inlet of the compressor 1 after being reheated, the gas phase is cooled through the first loop and then enters the separation tower 4, the light components are discharged from the top of the tower and enter the fourth loop in the multi-stream heat exchanger 7, the light components return to the mixed refrigerant system 8 after being reheated, and the liquid phase discharged from the bottom of the separation tower 4 is sent to the second storage tank 6.
The temperature of the outlet of the multi-stream heat exchanger is adjusted to be in the range of minus 30 to minus 150 ℃ and gradually reduced by adjusting the proportion of two gas phases entering the multi-stream heat exchanger 7, the pressure at the top of the separation tower is controlled to be in the range of 4.5MpaG to 2.5MpaG and gradually reduced, and the heavy components of isopentane or butane, propane or propylene and ethylene in the mixed refrigerant are gradually separated and sent to the second storage tank 6.
The mixed refrigerant recovery is stopped when the pressure in the mixed refrigerant system 8 is low or when the content of light components (methane and nitrogen) in the mixed refrigerant system 8 is analyzed to be more than 99%.
At this time, the gas in the mixed refrigerant system 8 is mainly nitrogen and methane, and is fed to a boiler as fuel gas or fed to a flare for combustion as required.
Adjusting the component mode of the mixed refrigerant:
1. separation of nitrogen
When the content of nitrogen in the mixed refrigerant system 8 is high, the nitrogen needs to be separated and discharged.
Opening a twelfth valve V12, starting the compressor 1, opening a sixth valve V6, returning a liquid phase separated by the gas-liquid separator 3 to the mixed refrigerant system 8, adjusting the proportion of two gas phases of the multi-flow heat exchanger 7, throttling most of the gas phase, returning the throttled gas phase to the inlet of the compressor 1, continuously circulating the mixed refrigerant, gradually reducing the temperature of the multi-flow heat exchanger 7, gradually increasing the gas phase to the separation tower 4 when the outlet temperature of the multi-flow heat exchanger is reduced to-160 ℃, controlling the top pressure of the separation tower 4 to be 2MpaG, discharging the gas separated from the top of the separation tower to be nitrogen containing a small amount of methane through the first valve V1 after the multi-flow heat exchanger 7 is reheated, and simultaneously supplementing methane to the mixed refrigerant system until the content of the nitrogen in the system reaches a target value.
2. Separation of isopentane
When the content of isopentane in the mixed refrigerant system 8 is high, the isopentane needs to be separated and then discharged to a storage tank for temporary storage.
Opening a twelfth valve V12, starting the compressor 1, opening a fourteenth valve V14, enabling a liquid phase separated by the gas-liquid separator 3 to enter the separation tower 4, adjusting the opening degree of a thirteenth valve V13, enabling a part of high-temperature mixed refrigerant at the outlet of the compressor to enter a reboiler 42 at the bottom of the separation tower, controlling the temperature at the bottom of the separation tower 4 to be 85 ℃ and the pressure at the top of the separation tower to be 0.45MpaG, enabling the liquid at the bottom of the separation tower to be almost pure isopentane, opening an eighth valve V8 and an eleventh valve V11, recovering the isopentane into the second storage tank 6, enabling the gas at the top of the separation tower to pass through the multi-stream heat exchanger 7 and then return to the mixed refrigerant system 8 until the content of the isopentane in the mixed refrigerant system 8 reaches a target value.
Claims (9)
- The mixed refrigerant recycling, storing and component adjusting device for the FLNG comprises a compressor, wherein an inlet of the compressor is connected to a first mixed refrigerant separating tank in a mixed refrigerant circulating system through a pipeline, an outlet of the compressor is connected with a cooler through a pipeline, and the device is characterized in that: the cooler is connected with a gas-liquid separator through a pipeline, a liquid phase port of the gas-liquid separator is connected to a first storage tank through a pipeline, a gas phase port of the gas-liquid separator is connected to a first strand loop in the multi-strand heat exchanger through a pipeline, the first strand loop is connected to a feed inlet in the middle of the separation tower through a pipeline, a gas phase port of the gas-liquid separator is connected to a second strand loop in the multi-strand heat exchanger through a second pipeline, the second strand loop is connected to a condenser at the top of the separation tower through a pipeline, the condenser is connected to a third strand loop in the multi-strand heat exchanger through a pipeline, and the third strand loop is connected to an inlet of the compressor through a pipeline; the top of the separation tower is connected to a fourth circuit in the multi-flow heat exchanger through a pipeline, and the fourth circuit is connected to an inlet separation tank of a mixed refrigerant compressor in the mixed refrigerant system through a pipeline; the bottom of the separation column is connected to a second storage tank through a pipeline.
- 2. A FLNG mixed refrigerant recovery storage and composition adjustment device as claimed in claim 1, wherein: and a liquid phase port of the gas-liquid separator is connected to a second mixed refrigerant separating tank in the mixed refrigerant system through a pipeline.
- 3. A FLNG mixed refrigerant recovery storage and composition adjustment device as claimed in claim 1, wherein: the fourth loop is connected with the outside through a pipeline.
- 4. A FLNG mixed refrigerant recovery storage and composition adjustment device as claimed in claim 1, wherein: the liquid phase port of the gas-liquid separator is connected with the feed inlet in the middle of the separation tower through a pipeline, the outlet of the compressor is connected to the reboiler at the bottom of the separation tower through a pipeline, and the reboiler is connected to the gas-liquid separator through a pipeline.
- 5. A FLNG mixed refrigerant recovery storage and composition adjustment device as claimed in claim 1, wherein: the bottom of the separation tower is connected to a third mixed refrigerant separation tank in the mixed refrigerant system through a pipeline.
- 6. A FLNG mixed refrigerant recovery storage and composition adjustment device as claimed in claim 1, wherein: the first storage tank and the second storage tank are connected through a pipeline.
- 7. A mixed refrigerant recovery storage and composition adjustment device for FLNG as claimed in any one of claims 1 to 6, wherein: each pipeline is provided with a valve.
- 8. A mixed refrigerant recovery storage and composition adjustment device for FLNG as claimed in any one of claims 1 to 6, wherein: the compressor is a screw compressor or a reciprocating compressor or a diaphragm compressor.
- 9. A mixed refrigerant recovery storage and composition adjustment device for FLNG as claimed in any one of claims 1 to 6, wherein: the multi-stream heat exchanger is a PCHE heat exchanger or a plate-fin heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120368424.9U CN214582078U (en) | 2021-02-08 | 2021-02-08 | FLNG mixed refrigerant recycling, storing and component adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120368424.9U CN214582078U (en) | 2021-02-08 | 2021-02-08 | FLNG mixed refrigerant recycling, storing and component adjusting device |
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| Publication Number | Publication Date |
|---|---|
| CN214582078U true CN214582078U (en) | 2021-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115164461A (en) * | 2022-06-16 | 2022-10-11 | 四川七化建化工工程有限公司 | Mixed refrigerant recovery system and method for liquefied natural gas device |
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2021
- 2021-02-08 CN CN202120368424.9U patent/CN214582078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115164461A (en) * | 2022-06-16 | 2022-10-11 | 四川七化建化工工程有限公司 | Mixed refrigerant recovery system and method for liquefied natural gas device |
| CN115164461B (en) * | 2022-06-16 | 2024-01-19 | 四川七化建化工工程有限公司 | Mixed refrigerant recovery system and method of liquefied natural gas device |
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