CN108518581A - LNG storage tank BOG recovery systems - Google Patents
LNG storage tank BOG recovery systems Download PDFInfo
- Publication number
- CN108518581A CN108518581A CN201810575596.6A CN201810575596A CN108518581A CN 108518581 A CN108518581 A CN 108518581A CN 201810575596 A CN201810575596 A CN 201810575596A CN 108518581 A CN108518581 A CN 108518581A
- Authority
- CN
- China
- Prior art keywords
- storage tank
- bog
- lng
- lng storage
- phase portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000002309 gasification Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000012071 phase Substances 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 239000006200 vaporizer Substances 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000003949 liquefied natural gas Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
-
- 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
- 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
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
-
- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
-
- 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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- 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
- F17C13/04—Arrangement or mounting of valves
-
- 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
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
-
- 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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/03—Treating the boil-off
- F17C2265/032—Treating the boil-off by recovery
Landscapes
- 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 LNG storage tank BOG recovery systems,Including vertical LNG storage tank,Institute's LNG storage tank top is gas phase portion,Institute's LNG storage tank lower part is liquid phase portion,The gas phase portion is connected to by discharge duct with BOG storage tanks,It is provided with pressure valve on the exhaust pipe,The liquid phase portion is connected to by outlet pipe with outside,It is provided with LNG gasification device in the outlet pipe,The LNG gasification device includes gasification pipe and shell,It is closed cavity between the feed channel and shell,The BOG storage tanks are connected to by outlet pipe with the cavity,The cavity is connected to by return-air duct with BOG liquefying plants,The liquefying plant is made of liquefaction tank body and the nitrogen vaporizer being arranged in liquefied pot body,The liquefaction tank base is connected to by liquid back pipe with LNG storage tank,It is provided with kinetic pump on the liquid back pipe.The BOG recovery systems of the present invention are effectively utilized the cold of LNG gasification generation, reduce the temperature difference of rear class cooling, greatly reduce energy consumption.
Description
Technical field
The present invention relates to BOG gas recycling fields, especially a kind of LNG storage tank BOG recovery systems.
Background technology
Liquefied natural gas (LNG) is a kind of good clean energy resource, its main component is methane, combustion heat value is high,
Environmental pollution is slight.As the cry for improving environmental quality is higher and higher, LNG is increasingly subject to the attention of people, extensively at present
It is applied to generally in resident living, motor vehicle fuel, power generation and other various industrial applications.LNG storage facilities is low temperature
Atmospheric storage tank to form BOG and be present in storage tank top to form gas phase empty since, there are the temperature difference, part LNG can gasify with external environment
Between in, so that tank inner pressure is increased, in order to ensure the safety of storage tank, when pressure inside the tank rises to certain value, need to arrange BOG
Empty or burning, causes waste and environmental pollution.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of LNG storage tank BOG recovery systems to be deposited with solving the prior art
The problem of.
The present invention uses following technical scheme：
A kind of LNG storage tank BOG recovery systems, including vertical LNG storage tank 1, institute's LNG storage tank top are gas phase portion M, institute LNG
Storage tank lower part is liquid phase portion N, and the gas phase portion M is connected to BOG storage tanks 3 by discharge duct 2, is provided on the exhaust pipe 2
Pressure valve 4, the liquid phase portion N are connected to by outlet pipe 5 with outside, and LNG gasification device 6, institute are provided in the outlet pipe 5
It includes gasification pipe 6a and shell 6b to state LNG gasification device 6, is closed cavity P between the feed channel 61 and shell 62, described
BOG storage tanks 3 are connected to by outlet pipe 7 with the cavity P, and the cavity P is connected by return-air duct 8 and BOG liquefying plants 9
Logical, the liquefying plant 9 is made of liquefaction tank body 9a and the nitrogen vaporizer 9b being arranged in liquefaction tank body 9a, the liquefied pot
The bottoms body 9a are connected to by liquid back pipe 10 with LNG storage tank 1, and kinetic pump 11 is provided on the liquid back pipe 10.
Further, the BOG recovery systems further include PLC control unit 12, and pressure is provided on the BOG storage tanks 3
Sensor 13, solenoid valve 14 is provided on the outlet pipe 7, and the solenoid valve 14, the pressure sensor 13 and PLC are controlled
Unit 12 connects.
Further, liquid level sensor 15, the liquid level sensor 15 and kinetic pump are provided in the liquefaction tank body 9a
11 connect with the PLC control unit 12.
Compared with the prior art, the advantages of the present invention are as follows：
1.LNG can absorb heat when gasifying discharges cold energy, this BOG recovery systems carry out level-one by the way that BOG is introduced LNG gasification device
Cooling is effectively utilized the cold of LNG gasification generation, reduces the temperature difference of rear class cooling, greatly reduces energy consumption.
2. BOG recovery systems, simple in structure, convenient for by system skid, floor space is small, and generalization is strong.
3. BOG recovery systems save manpower, it can be achieved that automation control.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of LNG storage tank BOG recovery systems in one embodiment of the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out detailed retouch
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
Refer to the attached drawing 1, a kind of LNG storage tank BOG recovery systems, including vertical LNG storage tank 1, institute's LNG storage tank top are gas phase
Portion M, institute's LNG storage tank lower part are liquid phase portion N, and the gas phase portion M is connected to by discharge duct 2 with BOG storage tanks 3, the exhaust pipe 2
On be provided with pressure valve 4, the liquid phase portion N is connected to by outlet pipe 5 with outside, and LNG gas is provided in the outlet pipe 5
Change device 6, the LNG gasification device 6 includes gasification pipe 6a and shell 6b, is closed chamber between the feed channel 6a and shell 6b
Body P, the BOG storage tanks 3 are connected to by outlet pipe 7 with the cavity P, and the cavity P is liquefied by return-air duct 8 and BOG
Device 9 is connected to, and the liquefying plant 9 is made of liquefaction tank body 9a and the nitrogen vaporizer 9b being arranged in liquefaction tank body 9a, institute
It states the liquefaction bottoms tank body 9a to be connected to LNG storage tank 1 by liquid back pipe 10, kinetic pump 11 is provided on the liquid back pipe 10.
Preferably, the BOG recovery systems further include PLC control unit 12, and pressure biography is provided on the BOG storage tanks 3
Sensor 13, solenoid valve 14 is provided on the outlet pipe 7, and the solenoid valve 14, pressure sensor 13 and PLC controls are single
Member 12 connects.
Preferably, liquid level sensor 15, the liquid level sensor 15 and kinetic pump 11 are provided in the liquefaction tank body 9a
It is connect with the PLC control unit 12.
The operation principle of the automatic Regulation LNG liquid addition system is：
When pressure in LNG storage tank is higher than the threshold values of pressure valve, pressure valve is opened, and BOG enters BOG by discharge duct and stores up
Tank, the pressure in BOG storage tanks transmits a signal to PLC control unit by pressure sensor, when pressure value reaches setting value,
PLC control unit opens solenoid valve, and BOG enters LNG gasification device and carries out level-one cooling, and the BOG after level-one cooling enters into liquid
Makeup, which is set, to be carried out two level cooling and liquefies to become liquid LNG, and level value is transferred to PLC controls by the liquid level sensor in liquefied pot body
Unit processed, when liquid level reaches setting value, PLC control unit starts kinetic pump, and the liquid LNG in liquefied pot body is transmitted back to
LNG storage tank.
It should be noted that the terms "include", "comprise" or its any other variant are intended to non-row herein
His property includes, so that the process, method, article or equipment including a series of elements includes not only those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including wanting
There is also other identical elements in the process, method, article or equipment of element.
It the above is only the specific implementation mode of the application, it is noted that those skilled in the art are come
It says, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
The protection domain of the application.
Claims (3)
1. a kind of LNG storage tank BOG recovery systems, which is characterized in that including vertical LNG storage tank, institute's LNG storage tank top is gas phase
Portion, institute's LNG storage tank lower part are liquid phase portion, and the gas phase portion is connected to BOG storage tanks by discharge duct, is arranged on the exhaust pipe
There are pressure valve, the liquid phase portion to be connected to outside by outlet pipe, LNG gasification device is provided in the outlet pipe, it is described
LNG gasification device includes gasification pipe and shell, is closed cavity between the feed channel and shell, and the BOG storage tanks pass through
Outlet pipe is connected to the cavity, and the cavity is connected to by return-air duct with BOG liquefying plants, and the liquefying plant is by liquid
Change tank body and the nitrogen vaporizer being arranged in liquefied pot body composition, the liquefaction tank base passes through liquid back pipe and LNG storage tank
It is connected to, kinetic pump is provided on the liquid back pipe.
2. according to LNG storage tank BOG recovery systems described in claim 1, which is characterized in that the BOG recovery systems further include PLC
Control unit is provided with pressure sensor on the BOG storage tanks, is provided with solenoid valve on the outlet pipe, the solenoid valve,
Pressure sensor is connect with the PLC control unit.
3. according to LNG storage tank BOG recovery systems described in claim 1, which is characterized in that be provided with liquid level in the liquefied pot body
Sensor, the liquid level sensor and kinetic pump are connect with the PLC control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575596.6A CN108518581A (en) | 2018-06-06 | 2018-06-06 | LNG storage tank BOG recovery systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575596.6A CN108518581A (en) | 2018-06-06 | 2018-06-06 | LNG storage tank BOG recovery systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108518581A true CN108518581A (en) | 2018-09-11 |
Family
ID=63427142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810575596.6A Pending CN108518581A (en) | 2018-06-06 | 2018-06-06 | LNG storage tank BOG recovery systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108518581A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082088A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | System and method for recovering residual liquid in loading and unloading of liquefied hydrocarbon |
| CN112082086A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Supercharged liquefied hydrocarbon loading and unloading residual liquid recovery system and method |
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| CN206018258U (en) * | 2016-08-18 | 2017-03-15 | 中燃宏远工程建设有限公司 | For BOG condensate recovery systems outside the LNG storage tank of LNG gas stations |
| CN107620863A (en) * | 2017-09-14 | 2018-01-23 | 上海铠韧气体工程股份有限公司 | A kind of re-liquefied systems of hydro carbons BOG and technique peculiar to vessel of liquefying |
| CN208652124U (en) * | 2018-06-06 | 2019-03-26 | 张家港艾普能源装备有限公司 | LNG storage tank BOG recovery system |
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2018
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| CN203202636U (en) * | 2013-04-28 | 2013-09-18 | 江苏安普特防爆科技有限公司 | Buffering system of LNG storage tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082088A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | System and method for recovering residual liquid in loading and unloading of liquefied hydrocarbon |
| CN112082086A (en) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | Supercharged liquefied hydrocarbon loading and unloading residual liquid recovery system and method |
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Application publication date: 20180911 |
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