CN109253390A - A kind of BOG recovery and processing system and treatment process - Google Patents
A kind of BOG recovery and processing system and treatment process Download PDFInfo
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- CN109253390A CN109253390A CN201811332117.4A CN201811332117A CN109253390A CN 109253390 A CN109253390 A CN 109253390A CN 201811332117 A CN201811332117 A CN 201811332117A CN 109253390 A CN109253390 A CN 109253390A
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- defeated device
- bog
- lng
- outlet
- defeated
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of BOG recovery and processing system and treatment process, belong to BOG recovery processing technical field.The bottom that pump is located in LNG storage tank in the tank of the processing system, first point of defeated device mixes defeated device with after-condenser and first respectively and is connected to, first mixes the inlet communication of the outlet of defeated device and high-pressure pump, the outlet of high-pressure pump and the inlet communication of vaporizer, the import one that the outlet of vaporizer mixes defeated device with second is connected to, the import of second point of defeated device is located at the top of LNG storage tank, be equipped with two outlets of second point of defeated device respectively with the inlet communication of a first compressor and a second compressor, the inlet communication that the outlet of first compressor mixes defeated device with second, the inlet communication of the outlet of second compressor and compression BOG storage tank, the outlet of compression BOG storage tank is connected to by pressure reducing valve with after-condenser.Processing system of the invention reduces production cost, prevents discharge BOG from increasing greenhouse effects, plays the role of protecting environment.
Description
Technical field
The present invention relates to BOG to be recycled technical field, and in particular to a kind of BOG recovery and processing system and treatment process.
Background technique
With socio-economic development, energy shortages and problem of environmental pollution become increasingly conspicuous, and are become using clean energy resource and are worked as
One of the theme of modern world energy consumption, heating value of natural gas is high, and pollution is low, small in size after liquefaction, is conveniently stored in transport, thus
It is concerned, and is widely used.However liquefied natural gas carries out storage transport at -160 DEG C or so, is easily invaded by external heat
Enter and the influence of other factors causes LNG station equipment superpressure, influence the safety of station to generate a large amount of BOG (boil-off gas)
Operation, and in the gas for generating greenhouse effects, CH4(methane) is to be only second to CO2Greenhouse gases, direct emission BOG is not only
It will cause energy consumption and economic loss, environmental protection can also be impacted.
Currently, the knot that leads to the problem of most of using directly compression and recondensation process of the Large LNG receiving station for BOG
Technique is closed, which is greatly lowered since LNG itself cold energy, energy consumption is utilized, but when LNG station is generated without outer defeated or BOG
When measuring excessive, it has to the inclined short side formula processing BOG that directly compresses or directly burnt by torch, so as to cause energy consumption increasing
High, economic impaired and problem of environmental pollution.
Summary of the invention
The purpose of the invention is to overcome the problems of the prior art, a kind of BOG recovery and processing system is provided.
The present invention provides a kind of BOG recovery and processing systems, comprising: pumps, first point of defeated device, is condensed in LNG storage tank, tank again
Device, first mix defeated device, high-pressure pump, vaporizer, second point of defeated device, the first compressor, the second compressor, compression BOG storage tank, decompression
Valve, second mix defeated device；
The bottom that pump is located in LNG storage tank in the tank, the input end of first point of defeated device are connected to pump in tank, and described first
Defeated device is divided to be equipped with outlet one and outlet two, after-condenser is equipped with import one, import two, outlet one and outlet two, first point of defeated device
Outlet one be connected to after-condenser import one, first mixes defeated device equipped with import one, import two and import three, and after-condenser goes out
It mouthful one and exports two and mixes the import one of defeated device with first respectively and import two is connected to, the outlet two of first point of defeated device mixes defeated with first
The import tee joint of device, first mixes the inlet communication of the outlet of defeated device and high-pressure pump, the outlet of high-pressure pump and the import of vaporizer
Connection, the import one that the outlet of vaporizer mixes defeated device with second are connected to；
The import of second point of defeated device is connected to the top of LNG storage tank, be equipped with two outlets of second point of defeated device respectively with
The inlet communication of a first compressor and a second compressor, the import two that the outlet of the first compressor mixes defeated device with second are connected to, the
The outlet of the inlet communication of the outlet of two compressors and compression BOG storage tank, compression BOG storage tank passes through pressure reducing valve and after-condenser
Import two is connected to.
The treatment process steps of BOG recovery and processing system are as follows:
S1, the LNG in LNG storage tank is conveyed outward by pump in tank, the conveying of LNG is divided into two parts, a part of LNG warp
First point of defeated device enters after-condenser and provides cold energy, then enters first out from after-condenser and mixes defeated device, another part LNG warp
First point of defeated device is directly entered first and mixes defeated device, mixes from first mixed through second after LNG that defeated device exports out is pressurized and vaporization
Defeated device enters outer defeated pipe network；
The BOG generated in S3, LNG storage tank is divided into two parts conveying by second point of defeated device, and first part BOG is through first
Compressor be forced into after outer defeated pressure enter second mix defeated device carry out it is outer defeated；
Under S4, nominal situation, second part BOG is forced into the operating pressure of after-condenser through the second compressor, through compressing
BOG storage tank enter in after-condenser in after-condenser LNG contact cooling liquid be LNG, then from after-condenser come out into
Enter first and mix defeated device, is mixed from first and mix defeated device into outer defeated pipe network through second after LNG that defeated device comes out is pressurized and vaporization；
When LNG is excessive without outer defeated and BOG yield, second part BOG is forced into high pressure through the second compressor, makes its body
Product flow becomes smaller, and is stored into compression BOG storage tank；When recovery defeated outside LNG or when being capable of providing enough cold energy, it is stored in compression
BOG gas in BOG storage tank is decompressed to the operating pressure of after-condenser through pressure reducing valve, into carrying out coolant liquid in after-condenser again
Change, mix defeated device subsequently into first, from first mix defeated device come out LNG it is pressurized and vaporization after through second mix defeated device enter it is outer defeated
Pipe network.
Preferably, the gas flow that BOG enters after-condenser in step S4 is carried out according to the amount of the LNG in after-condenser
Setting.
Preferably, in step S4 after-condenser operating pressure 0.8MPa~1.0MPa.
Preferably, when LNG is excessive without outer defeated and BOG yield, second part BOG is through the second compressor in step S4
It is forced into high pressure 0.8MPa~3.4MPa.
It compared with prior art, can benefit the beneficial effects of the present invention are: when LNG station is excessive without outer defeated or BOG yield
With compressor compresses BOG gas, reduce its volume and enter compression BOG storage tank, to can not temporarily carry out condensation process again or
The BOG compression that burning need to be emptied is stored, and BOG direct emission and the consumption using direct compression process processing BOG are avoided
The excessively high problem of energy, reduces production cost, increases greenhouse effects prevented also from discharge BOG, plays the role of protecting environment.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Description of symbols:
1.LNG storage tank, the interior pump of 2. tanks, 3. first points of defeated devices, 4. after-condensers, 5. first mix defeated device, 6. high-pressure pumps, 7. vapour
Change device, 8. second points of defeated devices, 9. first compressors, 10. second compressors, 11. compression BOG storage tanks, 12. pressure reducing valves, 13. the
Two mix defeated device.
Specific embodiment
With reference to the accompanying drawing 1, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
A kind of BOG recovery and processing system provided by the invention and treatment process, comprising: pump 2, first in LNG storage tank 1, tank
Defeated device 3, after-condenser 4, first is divided to mix defeated device 5, high-pressure pump 6,7, second points of defeated devices 8 of vaporizer, the first compressor 9, second pressure
Contracting machine 10, compression BOG storage tank 11, pressure reducing valve 12, second mix defeated device 13；
Pump 2 is located at the bottom in LNG storage tank 1 in the tank, and the input end of first point of defeated device 3 is connected to pump 2 in tank, described
Equipped with outlet one and outlet two, after-condenser 4 is equipped with import one, import two, exports one and outlet 2 first point of defeated device 3, and first
The outlet one of defeated device 3 is divided to be connected to 4 import one of after-condenser, first mixes defeated device 5 equipped with import one, import two and import three, then
The outlet one of the condenser 4 and import one of defeated device 5 is mixed with first respectively for outlet two and import two be connected to, first point of defeated device 3 out
Mouthfuls two and first mix defeated device 5 import tee joint, first mixes the outlet of defeated device 5 and the inlet communication of high-pressure pump 6, high-pressure pump 6
The inlet communication of outlet and vaporizer 7, the import one that the outlet of vaporizer 7 mixes defeated device 13 with second are connected to；
The import of second point of defeated device 8 is connected to the top of LNG storage tank 1, two outlets difference that second point of defeated device 8 is equipped with
The import two for mixing defeated device 13 with second with the inlet communication of the first compressor 9 and the second compressor 10, the outlet of the first compressor 9
Connection, the outlet of the second compressor 10 and the inlet communication of compression BOG storage tank 11, the outlet of compression BOG storage tank 11 pass through decompression
Valve 12 is connected to 4 import two of after-condenser.
The treatment process steps of above-mentioned BOG recovery and processing system are as follows:
S1, by the LNG in LNG storage tank 1, by pump 2 in tank, conveying, the conveying of LNG are divided into two parts, a part of LNG outward
Enter after-condenser 4 through first point of defeated device 3 and cold energy is provided, then comes out from after-condenser 4 into first and mix defeated device 5, another portion
Point LNG is directly entered first through first point of defeated device 3 and mixes defeated device 5, mixes that LNG that the defeated outlet of device 5 comes out is pressurized and vaporization from first
Defeated device 13, which is mixed, by second enters outer defeated pipe network；
The BOG generated in S3, LNG storage tank 1 is divided by second point of defeated device 8 to be conveyed for two parts, and first part BOG is through first
Compressor 9 be forced into after outer defeated pressure enter second mix defeated device 13 carry out it is outer defeated；
Under S4, nominal situation, second part BOG is forced into the operating pressure of after-condenser 4 through the second compressor 10, through pressing
Contracting BOG storage tank 11, which enters in after-condenser 4, contacts cooling liquid for LNG, then from after-condenser 4 with the LNG in after-condenser 4
Enter out and first mix defeated device 5, from first mix after LNG that defeated device 5 comes out is pressurized and vaporization through second mix defeated device 13 enter it is outer
Defeated pipe network；
When LNG is excessive without outer defeated and BOG yield, second part BOG is forced into high pressure through the second compressor 10, makes it
Volume flow becomes smaller, and is stored into compression BOG storage tank 11；When recovery defeated outside LNG or when being capable of providing enough cold energy, it is stored in
BOG gas in compression BOG storage tank 11 is decompressed to the operating pressure of after-condenser 4 through pressure reducing valve 12, into after-condenser 4 again
Cooling liquid is carried out, mixes defeated device 5 subsequently into first, is mixed from first mixed through second after LNG that defeated device 5 comes out is pressurized and vaporization
Defeated device 13 enters outer defeated pipe network.
Further, in step S4 BOG enter the gas flow of after-condenser 4 according to the amount of the LNG in after-condenser 4 into
Row setting.
Further, in step S4 after-condenser 4 operating pressure 0.8MPa~1.0MPa.
Further, in step S4, when LNG is excessive without outer defeated and BOG yield, second part BOG is through the second compression
Machine 10 is forced into high pressure 0.8MPa~3.4MPa.
It should be noted that compression BOG storage tank 11 can not only store compression BOG gas, buffering can also be played to a certain extent
Effect.Pressure reducing valve 12 can maintain the BOG pressure into after-condenser 4 to stablize.It compresses BOG storage tank 11 and pressure reducing valve 12 is nothing
Energy consumption equipment.
To sum up, when LNG station is excessive without outer defeated or BOG yield, using compressor compresses BOG gas, make its volume
Reduce enter compression BOG storage tank, to can not temporarily carry out condensation process again or need to empty burning BOG compression store,
BOG direct emission and the excessively high problem of energy consumption using direct compression process processing BOG are avoided, production cost is reduced,
It can prevent discharge BOG from increasing greenhouse effects, play the role of protecting environment.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of BOG recovery and processing system characterized by comprising pump (2) in LNG storage tank (1), tank, first point of defeated device (3),
After-condenser (4), first mix defeated device (5), high-pressure pump (6), vaporizer (7), second point of defeated device (8), the first compressor (9),
Two compressors (10), compression BOG storage tank (11), pressure reducing valve (12), second mix defeated device (13)；
Pump (2) is located at the bottom in LNG storage tank (1) in the tank, and the input end of first point of defeated device (3) is connected to pump (2) in tank,
First point of defeated device (3) is equipped with outlet one and outlet two, and after-condenser (4) is equipped with import one, import two, outlet one and outlet
Two, the outlet one of first point of defeated device (3) is connected to after-condenser (4) import one, and first mixes defeated device (5) equipped with import one, import
Two and import three, the outlet one and outlet two of after-condenser (4) mix the import one of defeated device (5) with first respectively and import two connects
It is logical, the outlet two of first point of defeated device (3) and first mix defeated device (5) import tee joint, first mixes the outlet and high pressure of defeated device (5)
The inlet communication of (6), the outlet of high-pressure pump (6) and the inlet communication of vaporizer (7) are pumped, the outlet of vaporizer (7) is mixed with second
The import one of defeated device (13) is connected to；
The import of second point of defeated device (8) is connected to the top of LNG storage tank (1), two outlets point that second point of defeated device (8) is equipped with
Not with the inlet communication of the first compressor (9) and the second compressor (10), the outlet of the first compressor (9) and second mixes defeated device
(13) import two is connected to, and the inlet communication of outlet and compression BOG storage tank (11) of the second compressor (10) compresses BOG storage tank
(11) outlet is connected to by pressure reducing valve (12) with after-condenser (4) import two.
2. the treatment process of BOG recovery and processing system as described in claim 1, which is characterized in that treatment process steps are as follows:
S1, the LNG in LNG storage tank (1) is conveyed outward by pump (2) in tank, the conveying of LNG is divided into two parts, a part of LNG
Enter after-condenser (4) through first point of defeated device (3) and cold energy is provided, then comes out from after-condenser (4) into first and mix defeated device
(5), another part LNG is directly entered first through first point of defeated device (3) and mixes defeated device (5), mixes what defeated device (5) outlet came out from first
LNG is pressurized to mix defeated device (13) into outer defeated pipe network through second with after vaporization；
The BOG generated in S3, LNG storage tank (1) is divided into two parts conveying by second point of defeated device (8), and first part BOG is through first
Compressor (9) be forced into after outer defeated pressure enter second mix defeated device (13) carry out it is outer defeated；
Under S4, nominal situation, second part BOG is forced into the operating pressure of after-condenser (4) through the second compressor (10), through pressing
Contracting BOG storage tank (11), which enters in after-condenser (4), contacts cooling liquid for LNG, then from again with the LNG in after-condenser (4)
Condenser (4), which comes out to enter, first mixes defeated device (5), mixes from first mixed through second after LNG that defeated device (5) come out is pressurized and vaporization
Defeated device (13) enters outer defeated pipe network；
When LNG is excessive without outer defeated and BOG yield, second part BOG is forced into high pressure through the second compressor (10), makes its body
Product flow becomes smaller, and is stored into compression BOG storage tank (11)；When recovery defeated outside LNG or when being capable of providing enough cold energy, it is stored in
BOG gas in compression BOG storage tank (11) is decompressed to the operating pressures of after-condenser (4) through pressure reducing valve (12), into condensing again
Device carries out cooling liquid in (4) again, mixes defeated device (5) subsequently into first, from first mix defeated device (5) come out LNG it is pressurized and
Defeated device (13), which are mixed, through second after vaporization enters outer defeated pipe network.
3. the treatment process of BOG recovery and processing system as claimed in claim 2, which is characterized in that in the step S4 BOG into
The gas flow for entering after-condenser (4) is set according to the amount of the LNG in after-condenser (4).
4. the treatment process of BOG recovery and processing system as claimed in claim 2, which is characterized in that cold again in the step S4
Operating pressure 0.8MPa~1.0MPa of condenser (4).
5. the treatment process of BOG recovery and processing system as claimed in claim 2, which is characterized in that in the step S4, LNG
When excessive without outer defeated and BOG yield, second part BOG through the second compressor (10) be forced into high pressure 0.8MPa~
3.4MPa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811332117.4A CN109253390B (en) | 2018-11-09 | 2018-11-09 | A kind of BOG recovery and processing system and treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811332117.4A CN109253390B (en) | 2018-11-09 | 2018-11-09 | A kind of BOG recovery and processing system and treatment process |
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| Publication Number | Publication Date |
|---|---|
| CN109253390A true CN109253390A (en) | 2019-01-22 |
| CN109253390B CN109253390B (en) | 2019-06-11 |
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ID=65043477
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|---|---|---|---|---|
| JPS5457222A (en) * | 1977-10-14 | 1979-05-08 | Mitsui Eng & Shipbuild Co Ltd | Evaporation device for lng combustion plant |
| JPH09183989A (en) * | 1995-12-28 | 1997-07-15 | Nippon Sanso Kk | Apparatus and method for re-liquefying boil-off gas in storage tank of liquefied natural gas |
| CN103443435A (en) * | 2011-03-11 | 2013-12-11 | 大宇造船海洋株式会社 | Method for driving system for supplying fuel to marine structure having re-iquefying device and high-<wbr/>pressure natural gas injection engine |
| CN104033727A (en) * | 2014-06-27 | 2014-09-10 | 中国海洋石油总公司 | Technique and device for treating BOG by using recycled cold energy at LNG receiving station |
| CN104197186A (en) * | 2014-08-28 | 2014-12-10 | 四川中油天能科技有限公司 | BOG recycling system of LNG gas station and realizing method of BOG recycling system |
| CN204153458U (en) * | 2014-08-28 | 2015-02-11 | 四川中油天能科技有限公司 | LNG gas station BOG recycling system |
| CN204829271U (en) * | 2015-07-17 | 2015-12-02 | 中海石油气电集团有限责任公司 | LNG receiving terminal BOG recycling processed system |
-
2018
- 2018-11-09 CN CN201811332117.4A patent/CN109253390B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5457222A (en) * | 1977-10-14 | 1979-05-08 | Mitsui Eng & Shipbuild Co Ltd | Evaporation device for lng combustion plant |
| JPH09183989A (en) * | 1995-12-28 | 1997-07-15 | Nippon Sanso Kk | Apparatus and method for re-liquefying boil-off gas in storage tank of liquefied natural gas |
| CN103443435A (en) * | 2011-03-11 | 2013-12-11 | 大宇造船海洋株式会社 | Method for driving system for supplying fuel to marine structure having re-iquefying device and high-<wbr/>pressure natural gas injection engine |
| CN104033727A (en) * | 2014-06-27 | 2014-09-10 | 中国海洋石油总公司 | Technique and device for treating BOG by using recycled cold energy at LNG receiving station |
| CN104197186A (en) * | 2014-08-28 | 2014-12-10 | 四川中油天能科技有限公司 | BOG recycling system of LNG gas station and realizing method of BOG recycling system |
| CN204153458U (en) * | 2014-08-28 | 2015-02-11 | 四川中油天能科技有限公司 | LNG gas station BOG recycling system |
| CN204829271U (en) * | 2015-07-17 | 2015-12-02 | 中海石油气电集团有限责任公司 | LNG receiving terminal BOG recycling processed system |
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| CN109253390B (en) | 2019-06-11 |
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Inventor after: Xiao Rongge Inventor after: Dai Zheng Inventor after: Jin Wenbo Inventor after: Gao Xu Inventor after: Ma Gang Inventor after: Jia Xiaojuan Inventor after: Jia Kefeng Inventor before: Xiao Rongge Inventor before: Dai Zheng Inventor before: Jin Wenbo Inventor before: Gao Xu Inventor before: Ma Gang |
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Effective date of registration: 20200903 Address after: No.101-7-2, building B1, West Yungu, diaotai sub district office, Fengxi new town, Xixian New District, Xianyang City, Shaanxi Province 710000 Patentee after: Shaanxi Jiaheng Kaida Information Technology Co., Ltd Address before: 710065, No. two, No. 18, Yanta District, Shaanxi, Xi'an Patentee before: Xi'an Shiyou University |