CN108194826B - A kind of LNG refueling system - Google Patents
A kind of LNG refueling system Download PDFInfo
- Publication number
- CN108194826B CN108194826B CN201810121084.2A CN201810121084A CN108194826B CN 108194826 B CN108194826 B CN 108194826B CN 201810121084 A CN201810121084 A CN 201810121084A CN 108194826 B CN108194826 B CN 108194826B
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- Prior art keywords
- storage tank
- bog
- lng
- tank
- car
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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
- 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
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/002—Automated filling apparatus
- F17C5/007—Automated filling apparatus for individual gas tanks or containers, e.g. in vehicles
-
- 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
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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 present invention relates to a kind of LNG refueling systems, by setting BOG storage tank 2 and by the connection between BOG storage tank 2 and LNG storage tank 1, booster 4, subcooler 5, realize the recycling of the liquefaction to the BOG gas in dispenser 3, LNG storage tank 1 and tank car 9, accomplished pair and gas station in BOG gas comprehensive recycling.
Description
Technical field
The present invention relates to a kind of LNG refueling systems, belong to liquefied natural gas facility technical field.
Background technique
Liquefied natural gas LNG is the liquid that is formed after natural gas is compressed, is cooled to its boiling point (- 161.5 DEG C) temperature, day
Right gas automobile provides the automobile of power by fuel of natural gas, has the advantages that economic, safe and environment-friendly, motor-driven, natural gas vehicle
Auto-pollution can be effectively reduced, atmosphere quality is improved.Therefore, can add for the liquefied natural gas of natural gas vehicle refueling
Mechanism of qi is just built in each department, to meet the needs of LNG car.
LNG refueling system usually by the LNG storage tank of storage liquid natural gas, is the dispenser of refueling, increases for tank car
The booster of pressure after pressurizeing to tank car, makes slot interior pressure be greater than pressure in LNG storage tank, to enable liquefied natural gas
It is enough to be flowed into LNG storage tank from tank car.
In LNG refueling system, LNG storage tank, dispenser, in tank car can output BOG gas, now there is also logical in the art
It crosses refrigeration machine liquefied natural gas is subcooled, sprays into storage tank to realize in storage tank by the liquefied natural gas of supercooling
BOG gas has been recycled in the liquefaction of BOG gas to a certain extent, however, at for the BOG gas and dispenser in tank car
The BOG gas of generation can not be accomplished to recycle.
Summary of the invention
The technical problem to be solved by the present invention is can not be returned to solve existing liquefied natural gas BOG gas recovery system
The technical issues of BOG gas generated at the BOG gas and dispenser of closed cans car, provide a kind of comprehensive recycling BOG gas
The LNG refueling system of body.
The technical solution adopted by the present invention to solve the technical problems is: a kind of LNG refueling system, comprising:
LNG storage tank, BOG storage tank, at least a dispenser, booster and subcooler；
LNG storage tank is connected to tank car bottom, for liquefied natural gas to be transported in LNG storage tank；
At the top of LNG storage tank, the return-air duct of dispenser be connected with BOG storage tank, stored up for BOG gas to be stored into BOG
In tank；
For BOG storage tank by being connected at the top of booster and tank car, BOG gas increases the pressure in tank car after passing through booster
Height, so that tank interior pressure is greater than in LNG storage tank；
Subcooler one end is connected to tank car and LNG storage tank bottom, and the other end is connected to the top of LNG storage tank and BOG storage tank.
Preferably, LNG refueling system of the invention, subcooler outlet is also connected to tank car top, when the liquid in tank car
After the completion of natural gas unloading, the liquefied natural gas of supercooling from tank car top spray to tank car in.
Preferably, LNG refueling system of the invention, BOG tank bottom are connected to subcooler.
Preferably, LNG refueling system of the invention is connected on the pipeline of BOG tank bottom and subcooler and is additionally provided with admittedly
Liquid/gas separator.
Preferably, LNG refueling system of the invention, LNG storage tank top are connected to by booster with BOG storage tank.
Preferably, LNG refueling system of the invention, after the liquefied BOG gas in BOG storage tank is subcooled by subcooler
It imports in LNG storage tank again.
Preferably, LNG refueling system of the invention, LNG storage tank and BOG tank top are also connected to emergency release channel,
Emergency release is provided with air heater on channel.
Preferably, the pipeline of LNG refueling system of the invention, emergency release channel is arranged outside around BOG storage tank.
The beneficial effects of the present invention are: LNG refueling system of the invention, by setting BOG storage tank and by BOG storage tank with
LNG storage tank, booster, the connection between subcooler, realize the liquid to the BOG gas in dispenser, LNG storage tank and tank car
Change recycling, accomplished pair and gas station in BOG gas comprehensive recycling.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the LNG refueling system in the embodiment of the present invention；
Appended drawing reference in figure are as follows:
1-LNG storage tank；2-BOG storage tank；3- dispenser；4- booster；5- subcooler；6- air heater；9- tank car.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
Embodiment
The present embodiment provides a kind of LNG refueling systems, as shown in Figure 1, being provided on each transmission pipeline all in accordance with needs
Kinetic pump and necessary valve, for sake of simplicity, in figure and being not drawn into, comprising:
LNG storage tank 1, BOG storage tank 2, (usual dispenser 3 can set several in a row to dispenser 3, with 1 to show in figure
Meaning), booster 4, subcooler 5；
LNG storage tank 1 is connected to tank car 9 (tank car 9 can be reached when supplementing liquefied natural gas) bottom, natural for that will liquefy
Gas is transported in LNG storage tank 1；
The top of LNG storage tank 1, dispenser 3 return-air duct be connected with BOG storage tank 2, for BOG gas to be stored into BOG
In storage tank 2；
BOG storage tank 2 at the top of booster 4 and tank car 9 by being connected to, and BOG gas is by making the pressure in tank car 9 after booster 4
Power increases, so that pressure is greater than in LNG storage tank 1 and (forms 200-400Pa pressure difference) in tank car 9, to guarantee liquefied natural gas
What is transmitted is smooth；
5 one end of subcooler is connected to tank car 9 and 1 bottom of LNG storage tank, the top of the other end and LNG storage tank 1 and BOG storage tank 2
It is connected to, the liquefied natural gas in tank car 9 and LNG storage tank 1 is after the supercooling of subcooler 5, from the top of LNG storage tank 1 and BOG storage tank 2
Portion is sprayed into LNG storage tank 1 and BOG storage tank 2 respectively, thus make the BOG gas liquefaction in LNG storage tank 1 and BOG storage tank 2, thus
Have the function that recycle BOG gas, meanwhile, and can reduce the pressure in LNG storage tank 1 and BOG storage tank 2；
The outlet of subcooler 5 is also connected to at the top of tank car 9, after the completion of the liquid natural gas in tank car 9 is unloaded, the liquid of supercooling
Change natural gas out of tank car 9 top spray to tank car 9, to make remaining BOG in tank car 9 liquefy, when pressure in tank car 9
Stop spray when lower than 1 atmospheric pressure, since the pressure in tank car 9 at this time is lower than pressure in LNG storage tank 1, this part
Liquefied natural gas can not be directly inputted in LNG storage tank 1, and therefore, tank car 9 is connect with BOG storage tank 2, in order to will be in tank car 9
Liquefied BOG is transported to BOG storage tank 2, at this point, the liquefied natural gas of spray supercooling, makes in BOG storage tank 2 for the ease of conveying
Pressure falls below pressure in tank car 9 in BOG storage tank 2；
2 bottom of BOG storage tank is connected to subcooler 5, is additionally provided on the pipeline of connection 2 bottom of BOG storage tank and subcooler 5 solid
Liquid/gas separator.
Be connected to BOG storage tank 2 at the top of LNG storage tank 1 by booster 4, when be stored in BOG storage tank 2 liquefied natural gas (by
The liquefied natural gas for spraying supercooling and the BOG gas that is liquefied and by tank car 9 convey Lai liquefied BOG gas) when, then
These liquefied natural gas need to be transported in LNG storage tank 1 and be stored, in order to adjust the pressure of LNG storage tank 1 Yu BOG storage tank 2, LNG storage
BOG is passed into BOG storage tank 2 after the pressurization of booster 4 in tank 1, and pressure in BOG storage tank 2 is made to be higher than LNG storage tank 1；
In order to enable the liquefied BOG gas in BOG storage tank 2 more can smoothly enter into LNG storage tank 1, in BOG storage tank 2
Liquefied BOG gas, which passes through after subcooler 5 is subcooled, to be imported again in LNG storage tank 1, due to the liquefied BOG gas in BOG storage tank 2
Body passes through the supercooling of subcooler 5, therefore when importing in LNG storage tank 1, so that it may make to obtain BOG gas liquefaction in LNG storage tank 1, from
And reduce pressure in LNG storage tank 1.
LNG storage tank 1, BOG storage tank 2,9 top of tank car are also connected to emergency release channel, and emergency release is provided on channel
Air heater 6, by 6 heats liquefied natural gas of air heater, the liquefied natural gas before making release is gasified totally.Emergency is put
The pipeline in channel is dissipated preferably about in being arranged outside BOG storage tank 2, and diffusing channel by emergency is when occurring abnormal, promptly to reduce LNG
Storage tank 1, BOG storage tank 2, the pressure in tank car 9 improve security of system.
The LNG refueling system of the present embodiment, by setting BOG storage tank 2 and by BOG storage tank 2 and LNG storage tank 1, booster
4, the connection between subcooler 5 realizes the recycling of the liquefaction to the BOG gas in dispenser 3, LNG storage tank 1 and tank car 9, does
Arrived pair and gas station in BOG gas comprehensive recycling.
The LNG refueling system of the present embodiment is when unloading to tank car 9, using following steps:
Discharge duct is connected to the bottom discharge openings of tank car 9, by 9 top of the pressure inlet being connected to booster 4 and tank car
Boost port connection；
It will be connected to the BOG gas at the top of LNG storage tank 1, in the BOG storage tank 2 of the return-air duct of dispenser 3 and pass through booster
It imports in tank car 9, to improve the pressure in tank car 9, and the BOG gas in LNG storage tank 1 is taken out in BOG storage tank 2, to guarantee
LNG in tank car 9 can smoothly be flowed into LNG storage tank 1；
When pressure is more than pressure 500pa or more in LNG storage tank 1 in tank car 9, the LNG liquid of 9 process of part tank car is sent
Enter in subcooler 5, again through in LNG storage tank 1 top spray to LNG storage tank 1 after subcooler is subcooled, to maintain 200-400Pa to press
Power is poor；
Tank car 9 (when remaining 2%-5%), subcooler 5 will be exported and be connected at the top of tank car 9 when completion of discharge, is subcooled
Liquefied natural gas (liquefaction that the natural gas of supercooling can be liquefied natural gas or tank car 9 itself in LNG storage tank 1 is natural
Gas is obtained through the supercooling of subcooler 5) out of tank car 9 top spray to tank car 9, so that remaining BOG in tank car 9 is made to liquefy,
Stop spray when pressure is lower than 1 atmospheric pressure in tank car 9, since the pressure in tank car 9 at this time is lower than pressure in LNG storage tank 1,
Therefore the liquefied natural gas of this part can not be directly inputted in LNG storage tank 1, and therefore, tank car 9 is connect with BOG storage tank 2, with
Convenient for BOG storage tank 2 will be transported in the liquefied BOG of tank car 9, at this point, for the ease of conveying, the liquid of spray supercooling in BOG storage tank 2
Change natural gas, pressure in BOG storage tank 2 is made to fall below pressure in tank car 9；
It, will be in LNG storage tank 1 or the BOG gas of the return-air duct of dispenser 3 imports BOG after the whole completions of discharge of tank car 9
Storage tank 2 is higher than pressure in LNG storage tank 1 to adjust pressure in BOG storage tank 2, and the liquid in BOG storage tank 2 is made to be flowed into LNG storage tank
In 1.
The LNG tank vehicle of the present embodiment is unloaded method, by setting by BOG storage tank 2 and LNG storage tank 1, booster 4, subcooler
The unloading system of 5 compositions is connect with tank car 9, and the pressure between BOG storage tank 2, LNG storage tank 1 and tank car 9 is adjusted when unloading,
It ensure that LNG unloads smooth, while realizing the liquefaction to the BOG gas in dispenser 3, LNG storage tank 1 and tank car 9 again
Recycling, has accomplished the recycling to BOG gas during unloading.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (7)
1. a kind of LNG refueling system characterized by comprising
LNG storage tank (1), BOG storage tank (2), at least a dispenser (3), booster (4) and subcooler (5)；
LNG storage tank (1) is connected to tank car (9) bottom, for liquefied natural gas to be transported in LNG storage tank (1)；
At the top of LNG storage tank (1), the return-air duct of dispenser (3) be connected with BOG storage tank (2), for BOG gas to be stored into
In BOG storage tank (2)；
For BOG storage tank (2) by being connected at the top of booster (4) and tank car (9), BOG gas makes tank car (9) after passing through booster (4)
Interior pressure increases, so that tank car (9) interior pressure is greater than in LNG storage tank (1)；
Subcooler (5) one end is connected to tank car (9) and LNG storage tank (1) bottom, the other end and LNG storage tank (1) and BOG storage tank (2)
Top connection；
Subcooler (5) outlet is also connected to tank car (9) top, after the completion of the liquid natural gas in tank car (9) is unloaded, supercooling
Liquefied natural gas is interior from tank car (9) top spray to tank car (9).
2. LNG refueling system according to claim 1, which is characterized in that BOG storage tank (2) bottom and subcooler (5) are even
It is logical.
3. LNG refueling system according to claim 2, which is characterized in that connection BOG storage tank (2) bottom and subcooler (5)
Pipeline on be additionally provided with solid-liquid separator.
4. LNG refueling system according to claim 2 or 3, which is characterized in that pass through booster at the top of LNG storage tank (1)
(4) it is connected to BOG storage tank (2).
5. LNG refueling system according to claim 4, which is characterized in that the liquefied BOG gas in BOG storage tank (2) is equal
It is imported in LNG storage tank (1) again after being subcooled by subcooler (5).
6. LNG refueling system according to claim 1-3, which is characterized in that LNG storage tank (1) and BOG storage tank
(2) top is also connected to emergency release channel, and emergency release is provided with air heater (6) on channel.
7. LNG refueling system according to claim 6, which is characterized in that the pipeline in emergency release channel is stored up around BOG
Tank (2) is arranged outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810121084.2A CN108194826B (en) | 2018-02-07 | 2018-02-07 | A kind of LNG refueling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810121084.2A CN108194826B (en) | 2018-02-07 | 2018-02-07 | A kind of LNG refueling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108194826A CN108194826A (en) | 2018-06-22 |
| CN108194826B true CN108194826B (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810121084.2A Active CN108194826B (en) | 2018-02-07 | 2018-02-07 | A kind of LNG refueling system |
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| Country | Link |
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| CN (1) | CN108194826B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194826B (en) * | 2018-02-07 | 2019-09-10 | 贝利智能装备（张家港）有限公司 | A kind of LNG refueling system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203731079U (en) * | 2014-01-14 | 2014-07-23 | 新地能源工程技术有限公司 | LNG (Liquefied Natural Gas) filling system for inland lake ship |
| CN204345267U (en) * | 2014-10-17 | 2015-05-20 | 西南石油大学 | A kind of small-sized LNG gas station storage tank BOG recovering device |
| CN204678044U (en) * | 2015-05-15 | 2015-09-30 | 新地能源工程技术有限公司 | Liquefied natural gas filling station is utilized to discard the system of natural gas power |
| CN105135208A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Compression recycling method for evaporation gas of liquefied natural gas |
| CN205331786U (en) * | 2016-01-15 | 2016-06-22 | 欧星(天津)新能源科技有限公司 | Novel LNG filling station BOG reliquefaction recovery system |
| CN107664258A (en) * | 2017-08-10 | 2018-02-06 | 吉林省华生燃气集团有限公司 | BOG gas recovery systems in a kind of urban gate station |
| CN108194826A (en) * | 2018-02-07 | 2018-06-22 | 贝利智能装备（张家港）有限公司 | A kind of LNG refueling systems |
-
2018
- 2018-02-07 CN CN201810121084.2A patent/CN108194826B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203731079U (en) * | 2014-01-14 | 2014-07-23 | 新地能源工程技术有限公司 | LNG (Liquefied Natural Gas) filling system for inland lake ship |
| CN204345267U (en) * | 2014-10-17 | 2015-05-20 | 西南石油大学 | A kind of small-sized LNG gas station storage tank BOG recovering device |
| CN204678044U (en) * | 2015-05-15 | 2015-09-30 | 新地能源工程技术有限公司 | Liquefied natural gas filling station is utilized to discard the system of natural gas power |
| CN105135208A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Compression recycling method for evaporation gas of liquefied natural gas |
| CN205331786U (en) * | 2016-01-15 | 2016-06-22 | 欧星(天津)新能源科技有限公司 | Novel LNG filling station BOG reliquefaction recovery system |
| CN107664258A (en) * | 2017-08-10 | 2018-02-06 | 吉林省华生燃气集团有限公司 | BOG gas recovery systems in a kind of urban gate station |
| CN108194826A (en) * | 2018-02-07 | 2018-06-22 | 贝利智能装备（张家港）有限公司 | A kind of LNG refueling systems |
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| Publication number | Publication date |
|---|---|
| CN108194826A (en) | 2018-06-22 |
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