CN110173959A - A kind of re-liquefied recovery system of boil-off gas - Google Patents
A kind of re-liquefied recovery system of boil-off gas Download PDFInfo
- Publication number
- CN110173959A CN110173959A CN201910403170.7A CN201910403170A CN110173959A CN 110173959 A CN110173959 A CN 110173959A CN 201910403170 A CN201910403170 A CN 201910403170A CN 110173959 A CN110173959 A CN 110173959A
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- Prior art keywords
- tank
- gas
- propane
- boil
- cooling device
- Prior art date
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Links
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims abstract description 168
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 94
- 239000001294 propane Substances 0.000 claims abstract description 84
- 239000007789 gas Substances 0.000 claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 46
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 238000010408 sweeping Methods 0.000 claims abstract description 14
- 239000003507 refrigerant Substances 0.000 claims abstract description 9
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 9
- 230000008676 import Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 15
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Classifications
-
- 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
- F25J1/0025—Boil-off gases "BOG" from storages
-
- 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
-
- 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
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/60—Natural gas or synthetic natural gas [SNG]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The present invention discloses a kind of re-liquefied recovery system of boil-off gas, including rack and is set to the primary cooling device and second level cooling device in rack and contacted；The primary cooling device includes pre- cool exchanger, the condensing agent entrance of the pre- cool exchanger connects nitrogen storage tank by propane cooler, the refrigerant outlet of the pre- cool exchanger is also connected to goods tank, the second level cooling device includes condensing heat exchanger and condenses and separates tank, and boil-off gas is successively liquefying and the arrival tank that flows back by pre- cool exchanger, condensing heat exchanger and after condensing and separating tank.Above-mentioned technical proposal has the beneficial effect that two-stage liquefying plant can increase the stroke of boil-off gas, guarantee thoroughly liquefies to boil-off gas, in addition, using liquid nitrogen as cold source, it does not need using compressor, it saves the energy, and liquid nitrogen can also carry out the operation of sweeping after heat absorption becomes nitrogen to goods tank, ensure that and do not needing to deposit gas and can carry out Sui's processing to goods tank.
Description
Technical field
The present invention relates to gas recovery techniques fields, and in particular to a kind of re-liquefied recovery system of boil-off gas.
Background technique
The liquefied natural gas filling ship of similar charging burden all uses 2 liquefied natural gas c-type storage tanks substantially at present, point
It is not placed in the hull subdivision structure that 2 front and backs are mutually isolated；And it is equipped with a set of reliquefaction disposal equipment and system, for handling
The natural gas gas of natural evaporation in cargo hold makes to flow back into cargo hold after its is re-liquefied；Existing reliquefaction disposal equipment is using pressure
Contracting machine drives refrigerant circulation to complete the liquefaction to gas, but structure is complicated for this reliquefaction disposal equipment, and energy consumption is high.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of re-liquefied recovery system of boil-off gas, does not need using pressure
Contracting machine, and it is able to carry out sweeping, additional function is additionally provided while reducing energy consumption.
The re-liquefied recovery system of a kind of boil-off gas provided by the invention including rack and is set in rack and contacts
Primary cooling device and second level cooling device；
The primary cooling device includes pre- cool exchanger, and the condensing agent entrance of the pre- cool exchanger passes through propane-cooled
Device connects nitrogen storage tank, and the refrigerant outlet of the pre- cool exchanger is also connected to goods tank, the goods tank and refrigerant outlet
Between be provided with heater for sweeping；Using liquid nitrogen as cold source, liquid nitrogen cools down the propane in propane cooler
Lead in pre- cool exchanger afterwards and cooling for the first time is carried out to boil-off gas.
The second level cooling device includes condensing heat exchanger and condenses and separates tank, and the condensing agent of the condensing heat exchanger enters
Mouth is connected to the propane outlets of the propane cooler, and the propane import of the propane cooler connects propane container, the condensation
Condenser pipe is provided in knockout drum, the condenser pipe is connected to the propane outlets of the propane cooler, and boil-off gas is successively passing through
It crosses pre- cool exchanger, condensing heat exchanger and liquefies and the arrival tank that flows back after condensing and separating tank.The condensation of second level cooling device is changed
Hot device is using propane after cooling as condensing agent.
The primary cooling device for having the beneficial effect that setting and second level cooling device of above-mentioned technical proposal can be to boil-off gas
Classification cooling is carried out, the gas for being conducive to the heterogeneity in boil-off gas can condense respectively, and two-stage liquefying plant can increase
The stroke of boil-off gas, guarantee thoroughly liquefies to boil-off gas, in addition, not needed as cold source using compression using liquid nitrogen
Machine saves the energy, and liquid nitrogen can also carry out the operation of sweeping after heat absorption becomes nitrogen to goods tank, ensure that and do not needing
When depositing gas Sui's processing can be carried out to goods tank.
Further, there are two the propane cooler tools, the first propane cooler and the second propane respectively concatenated is cold
But device, is provided with first circulation pump between the second level cooling device and the propane cooler, the propane passes through described the
One circulating pump circulates between second level cooling device and propane cooler.Two propane coolers are able to extend propane and liquid
The time of contact of nitrogen, to propane thoroughly be cooled down, so that propane possesses sufficiently low temperature and removes condensation evaporation gas.
Further, second circulation pump is provided between the propane outlets and propane inlet of second propane cooler.Institute
Stating second circulation pump can continuously recycle propane repeatedly cooling in the second propane cooler, can reduce the temperature of propane
To the range of needs.
Further, the pre- cool exchanger has two, and respectively the first pre- cool exchanger in parallel and the second pre-cooling is handed over
Parallel operation.First pre- cool exchanger and the second pre- cool exchanger can increase the flow of boil-off gas using parallel connection, so that the unit time
Interior treating capacity increases.
It further, further include a temporary gas tank, the temporary gas tank is set between the condensation separation tank and goods tank, institute
It states and is additionally provided with delivery pump between temporary gas tank and the condensation separation tank.The temporary gas tank can will be after a small amount of liquefaction
Gas stores, and avoids frequently conveying into goods tank.
Further, it is connected between the condensing agent entrance of the pre- cool exchanger, propane cooler and nitrogen storage tank
First pipe is connected with second pipe, the boil-off gas of the goods tank between the refrigerant outlet and goods tank of the pre- cool exchanger
Connected between outlet and the boil-off gas entrance of the pre- cool exchanger by third pipeline, the goods tank and the temporary gas tank it
Between be connected with the 4th pipeline, be additionally provided with the first nitrogen discharge pipe on the condensation separation tank.First nitrogen discharge is effective
Nitrogen after sweeping is discharged when sweeping illustrates sweeping when the nitrogen gas concn being discharged in the first nitrogen discharge pipe is especially high
Through completing.
Further, it is corresponded on the second pipe and is provided with the first valve between the heater and goods tank.Pass through first
Valve controls sweeping, and when the first valve is opened, the heated device of liquid nitrogen is heated after becoming nitrogen through second pipe goods tank
In, and then be discharged by temporary gas tank and after condensing and separating tank.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the flow chart of the embodiment of the present invention；
Fig. 3 is the side view of the embodiment of the present invention.
Appended drawing reference: rack 100, control cabinet 110, primary cooling device 1, the first pre- cool exchanger 1a, the second pre-cooling are handed over
Parallel operation 1b, the first propane cooler 2a, the second propane cooler 2b, first circulation pump 2c, condensing heat exchanger 3a, tank is condensed and separated
3b, nitrogen storage tank 4, propane container 5, goods tank 6, temporary gas tank 7, third interface 7a, first pipe 8, first interface 8a, the second pipe
Road 9, heater 9a, the first valve 9b, second interface 9c, third pipeline 10, the 4th pipeline 11, the first nitrogen discharge pipe 12,
Two nitrogen delivery pipe 12a, third nitrogen discharge pipe 12b, delivery pump 13.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this hair
The ordinary meaning that bright one of ordinary skill in the art are understood.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In this application unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.
As illustrated in fig. 1 and 2, the present embodiment provides a kind of re-liquefied recovery systems of boil-off gas, including rack 100 and setting
In in rack 100 and contact primary cooling device 1 and second level cooling device；The gas that boil-off gas stores in goods tank 6, example
Such as natural gas；
The primary cooling device 1 includes pre- cool exchanger, and the condensing agent entrance of the pre- cool exchanger is cold by propane
But device connects nitrogen storage tank 4, and the refrigerant outlet of the pre- cool exchanger is also connected to goods tank 6, the goods tank 6 and condensing agent
The heater 9a for sweeping is provided between outlet；Using liquid nitrogen as cold source, liquid nitrogen to the propane in propane cooler into
Lead to after row is cooling cooling for the first time to boil-off gas progress in pre- cool exchanger.
The second level cooling device includes condensing heat exchanger 3a and condenses and separates tank 3b, and the condensing heat exchanger 3a's is cold
Solidifying agent entrance is connected to the propane outlets of the propane cooler, and the propane import of the propane cooler connects propane container 5, institute
It states to condense and separate in tank 3b and is provided with condenser pipe, the condenser pipe is connected to the propane outlets of the propane cooler, boil-off gas
Successively liquefying and the arrival tank 6 that flows back by pre- cool exchanger, condensing heat exchanger 3a and after condensing and separating tank 3b.Second level is cooling
The condensing heat exchanger 3a of device is using propane after cooling as condensing agent.
It further include a temporary gas tank 7, the temporary gas tank 7 is set between the condensation separation tank 3b and goods tank 6, described
Delivery pump 13 is additionally provided between temporary gas tank 7 and the condensation separation tank 3b.The temporary gas tank 7 can be by a small amount of liquefaction
Gas afterwards stores, and avoids frequently conveying into goods tank 6.
The primary cooling device 1 and second level cooling device of setting can carry out classification cooling to boil-off gas, be conducive to evaporate
The gas of heterogeneity in gas can condense respectively, and two-stage liquefying plant can increase the stroke of boil-off gas, guarantee to evaporation
Gas is thoroughly liquefied, in addition, do not need to save the energy using compressor using liquid nitrogen as cold source, and liquid nitrogen is being inhaled
Thermal change is the operation that can also carry out sweeping after nitrogen to goods tank 6, and ensure that can carry out Sui to goods tank 6 when not needing to deposit gas
Change processing.
Referring to fig. 2, there are two the propane cooler tools, the first propane cooler 2a respectively concatenated and the second propane
Cooler 2b, is provided with first circulation pump 2c between the second level cooling device and the propane cooler, the propane passes through
The first circulation pump 2c is circulated between second level cooling device and propane cooler.Two propane coolers are able to extend
The time of contact of propane and liquid nitrogen, to propane thoroughly be cooled down, so that propane possesses sufficiently low temperature and removes condensation evaporation
Gas.
Referring to fig. 2, the pre- cool exchanger has two, the respectively pre-cooling of the first pre- cool exchanger 1a in parallel and second
Exchanger 1b.The first pre- pre- cool exchanger 1b of cool exchanger 1a and second can increase the flow of boil-off gas using parallel connection, so that
Treating capacity in unit time increases.
Referring to figs. 2 and 3, between the condensing agent entrance of the pre- cool exchanger, propane cooler and nitrogen storage tank 4
It is connected with first pipe 8, the first interface 8a for connecting with nitrogen storage tank 4 is provided in the first pipe 8, in reality
In application, can dismount or replace nitrogen storage tank 4 by first interface 8a, the refrigerant outlet of the pre- cool exchanger with
Be connected with second pipe 9 between goods tank 6, the boil-off gas entrance of the boil-off gas outlet of the goods tank 6 and the pre- cool exchanger it
Between connected by third pipeline 10, be connected with the 4th pipeline 11 between the goods tank 6 and the temporary gas tank 7, the condensation point
From being additionally provided with the first nitrogen discharge pipe 12 on tank 3b.The first nitrogen discharge pipe 12 is used for nitrogen when sweeping after discharge sweeping
Gas illustrates that sweeping has been completed when the nitrogen gas concn being discharged in the first nitrogen discharge pipe 12 is especially high.
Referring to fig. 2, it is corresponded on the second pipe 9 and is provided with the first valve 9b, institute between the heater 9a and goods tank 6
It states to correspond on second pipe 9 and is additionally provided with the second nitrogen discharge pipe 12a on the left of the heater 9a, it is right on the second pipe
It answers and is additionally provided with third nitrogen discharge pipe 12b on the left of the second nitrogen discharge pipe 12a.It is swept by the first valve 9b control
Cabin, when the first valve 9b is opened, liquid nitrogen heated device 9a heating becomes after nitrogen by 9 goods tank 6 of second pipe, into
And it is discharged by temporary gas tank 7 and after condensing and separating tank 3b.
Referring to Fig. 1 and 2, docked in order to facilitate the re-liquefied recovery system of boil-off gas with target to be liquefied, in third
Second interface 9c is provided on pipeline 10, since goods tank 6 loads target to be liquefied, goods tank 6 is to pass through second interface
9c is connect with pre- cool exchanger, in addition, being additionally provided with control in rack 100 to enable various pieces co-operating
Case 110, control mainboard is provided in control cabinet 110, and the output end of the control mainboard is connected with above-mentioned valve and pump；?
In use, being first turned on the valve of nitrogen storage tank 4, so that being full of liquid nitrogen in propane cooler and pre- cool exchanger, then will
Propane is released, so that propane is cooled down, is pumped 2c by first circulation and is sent the propane after cooling into second level cooling device, then
It is connected to goods tank 6 and pre- cool exchanger, so that the boil-off gas (the present embodiment refers in particular to natural gas) in goods tank 6 can pass sequentially through primary
Cooling device 1 and second level cooling device carry out cooling liquefaction, finally by delivery pump 13 by liquefied natural gas transportation to temporary
Gas tank 7 is arranged on the pipeline that the temporary gas tank 7 is connect with delivery pump 13 perhaps in goods tank 6 for the ease of carrying or installing
There is third interface 7a, the pipeline for being provided with third interface 7a is also connected to the condensation separation tank 3b.
As another preferred embodiment of the invention, in the propane outlets and propane inlet of the second propane cooler 2b
Between be additionally provided with second circulation pump, be that the propane outlets of the second propane cooler 2b and propane inlet are provided with reflux
Pipe, to propane carry out multiple circulating cooling when, propane by the second propane cooler 2b propane outlets come out after via return
Flow tube returns in the second propane cooler 2b, and second circulation pump is that above-mentioned circulate provides power.The second circulation pumps energy
Enough by propane, continuously circulation is repeatedly cooling in the second propane cooler 2b, and the temperature of propane can be reduced to the model of needs
It encloses.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (6)
1. a kind of re-liquefied recovery system of boil-off gas, which is characterized in that including rack (100) and be set in rack (100)
And the primary cooling device (1) and second level cooling device contacted；
The primary cooling device (1) includes pre- cool exchanger, and the condensing agent entrance of the pre- cool exchanger passes through propane-cooled
Device connects nitrogen storage tank (4), and the refrigerant outlet of the pre- cool exchanger is also connected to goods tank (6), the goods tank (6) with it is cold
The heater (9a) for sweeping is provided between solidifying agent outlet；
The second level cooling device includes condensing heat exchanger (3a) and condenses and separates tank (3b), the condensing heat exchanger (3a)
Condensing agent entrance is connected to the propane outlets of the propane cooler, and the propane import of the propane cooler connects propane container
(5), condenser pipe, the propane outlets company of the condenser pipe and the propane cooler are provided in the condensation separation tank (3b)
Logical, boil-off gas is successively liquefying and is flowing back by pre- cool exchanger, condensing heat exchanger (3a) and after condensing and separating tank (3b)
Goods tank (6).
2. the re-liquefied recovery system of a kind of boil-off gas according to claim 1, which is characterized in that the propane-cooled utensil
There are two, the first propane cooler (2a) and the second propane cooler (2b) respectively concatenated, the second level cooling device with
First circulation pump (2c) is provided between the propane cooler, it is cold in second level that the propane by the first circulation pumps (2c)
But it is circulated between device and propane cooler.
3. the re-liquefied recovery system of a kind of boil-off gas according to claim 1, which is characterized in that the pre- cool exchanger tool
There are two, the first pre- cool exchanger (1a) and the second pre- cool exchanger (1b) respectively in parallel.
4. the re-liquefied recovery system of a kind of boil-off gas according to claim 1, which is characterized in that further include a temporary gas tank
(7), the temporary gas tank (7) is set between the condensation separation tank (3b) and goods tank (6), the temporary gas tank (7) and institute
It states to condense and separate and is additionally provided with delivery pump (13) between tank (3b).
5. the re-liquefied recovery system of a kind of boil-off gas according to claim 4, which is characterized in that the pre- cool exchanger
It is connected with first pipe (8) between condensing agent entrance, propane cooler and nitrogen storage tank (4), the pre- cool exchanger
It is connected between refrigerant outlet and goods tank (6) second pipe (9), boil-off gas outlet and the pre-cooling of the goods tank (6) are handed over
It is connected between the boil-off gas entrance of parallel operation by third pipeline (10), is connected between the goods tank (6) and the temporary gas tank (7)
There is the 4th pipeline (11), the first nitrogen discharge pipe (12) is additionally provided on the condensation separation tank (3b).
6. the re-liquefied recovery system of a kind of boil-off gas according to claim 5, which is characterized in that the second pipe (9)
The first valve (9b) is provided between the upper correspondence heater (9a) and goods tank (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403170.7A CN110173959B (en) | 2019-05-15 | 2019-05-15 | Boil-off gas reliquefaction recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403170.7A CN110173959B (en) | 2019-05-15 | 2019-05-15 | Boil-off gas reliquefaction recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173959A true CN110173959A (en) | 2019-08-27 |
| CN110173959B CN110173959B (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910403170.7A Active CN110173959B (en) | 2019-05-15 | 2019-05-15 | Boil-off gas reliquefaction recovery system |
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| KR20160134347A (en) * | 2015-05-15 | 2016-11-23 | 대우조선해양 주식회사 | The System and Method for Carbon Dioxide Separation from Natural Gas before Gas Liquefaction Process |
| CN206176888U (en) * | 2016-11-03 | 2017-05-17 | 天道新能源科技有限公司 | System for utilize liquefied air cooling to prepare LNG |
| CN209877481U (en) * | 2019-05-15 | 2019-12-31 | 挪威极地航运公司 | Boil-off gas reliquefaction recovery system |
-
2019
- 2019-05-15 CN CN201910403170.7A patent/CN110173959B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030638A (en) * | 1987-06-24 | 1989-01-25 | 凯洛格总公司 | It under usual conditions the degree of depth cooling means of the hydrocarbon mixture of gaseous state |
| WO2004010064A1 (en) * | 2002-07-23 | 2004-01-29 | Linde Aktiengesellschaft | Method for liquefying a hydrocarbon-rich flow while simultaneously obtaining a c3/c4-rich fraction |
| US20140060111A1 (en) * | 2012-09-06 | 2014-03-06 | Linde Aktiengesellschaft | Process for liquefying a hydrocarbon-rich fraction |
| CN104503505A (en) * | 2014-12-02 | 2015-04-08 | 兰州华宇航天技术应用有限责任公司 | Back heating type gas closed circulation refrigeration heating and temperature adjustment system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110173959B (en) | 2021-04-02 |
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