CN108361547A - Novel LNG gas stations and its working method - Google Patents
Novel LNG gas stations and its working method Download PDFInfo
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- CN108361547A CN108361547A CN201810105285.3A CN201810105285A CN108361547A CN 108361547 A CN108361547 A CN 108361547A CN 201810105285 A CN201810105285 A CN 201810105285A CN 108361547 A CN108361547 A CN 108361547A
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- bog
- surge tanks
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 134
- 238000004064 recycling Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 13
- 238000005429 filling process Methods 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000003949 liquefied natural gas Substances 0.000 description 337
- 239000007789 gas Substances 0.000 description 39
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature 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
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/035—Orientation with substantially horizontal main axis
-
- 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
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/054—Size medium (>1 m3)
-
- 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
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0329—Valves manually actuated
-
- 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
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
- F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
-
- 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
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/01—Propulsion of the fluid
- F17C2227/0128—Propulsion of the fluid with pumps or compressors
- F17C2227/0157—Compressors
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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
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0439—Temperature
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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
- F17C2265/00—Effects achieved by gas storage or gas handling
- F17C2265/06—Fluid distribution
- F17C2265/063—Fluid distribution for supply of refuelling stations
-
- 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
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0165—Applications for fluid transport or storage on the road
- F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
- F17C2270/0171—Trucks
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 novel LNG gas stations, including LNG tank cars, LNG storage tank, LNG filling machines, storage tank supercharging gasifier, supercharging gasifier of unloading, and further include BOG recycling compressor, multiple LNG surge tanks；LNG storage tank is connect with LNG tank cars by feed liquor house steward and gas pipeline, and LNG storage tank, BOG recycle compressor, the gas phase mouth of LNG tank cars is sequentially communicated by pipeline；Multiple LNG surge tanks are in parallel by pipeline with LNG storage tank, and each LNG surge tanks are sequentially communicated to form forward and reverse two accesses by different pipelines from BOG recycling compressor, LNG storage tank respectively；Each LNG surge tanks are also sequentially communicated with LNG filling machines, LNG storage tank by pipeline respectively；It is both provided with valve on aforementioned each pipeline, to realize the LNG or BOG circulation route choosing needs when different working condition.Also disclose the working method of the novel LNG gas stations.
Description
Technical field
The present invention relates to LNG gas stations technical fields, and in particular to a kind of novel LNG gas stations and its working method.
Background technology
LNG (liquefied natural gas, liquefied natural gas) be it is a kind of cleaning, the efficient energy.Natural gas conduct
Clean energy resource is more and more favored, and LNG is all classified as preferred fuels by many countries, and ratio of the natural gas in energy supply is fast
Speed increases.Liquefied natural gas just with every year about 12% rapid growth, becomes the whole world and increases most swift and violent one of energy industry.
LNG automobiles are as national clean energy resource vehicle, the development advanced by leaps and bounds in recent years, while LNG gas stations are also as after rain
The construction of large area has been carried out as spring bamboo.
BOG (Boil offGas, flashed vapour) refers to that LNG liquid is pressurizeed the low temperature gas after being gasified below critical-temperature
Body, since LNG is cryogen, although LNG filling gas station equipments have good insulation, in the process for storing and operating
In, due to natural heat transfer and system cooling required, a certain number of gases, i.e. BOG are all inevitably resulted from, with
The increase for BOG quantity makes the temperature and pressure in LNG storage tank tank increase, when reaching a certain level, it has to release BOG with
Reduce pressure inside the tank.
Currently, mainstream LNG gas stations mostly use equipment of the LNG immersed pumps as LNG pressurizing processes on the market.Existing for it
Disadvantage includes：One, it is difficult to meet LNG immersed pumps pond feed liquor demand when LNG storage tank is in low liquid level, be easy to cause the latent liquid of LNG
It is evacuated when pump operation；Two, LNG immersed pumps outlet pressure is affected by LNG storage tank pressure and LNG liquid temperature, in LNG storage tank pressure
In the case that low, the vehicle-mounted bottle pressure height of LNG, LNG liquid temperature are low, conventional LNG immersed pumps are relatively difficult to guarantee outlet pressure to meet LNG vehicles
It carries bottle and fills demand.
Invention content
It is an object of the invention in view of the above-mentioned problems, offer is a kind of to utilize low temperature BOG recycling compressors and LNG surge tanks
Instead of the novel LNG gas stations and its working method of LNG immersed pumps.
For this purpose, the technical solution adopted in the present invention is：
A kind of novel LNG gas stations, including LNG tank cars, LNG storage tank, LNG filling machines, storage tank supercharging gasifier, increasing of unloading
Gasifier, the LNG storage tank is pressed to connect storage tank by pipeline and be pressurized gasifier, be provided on the LNG tank cars and unload liquid mouth, gas phase
Mouth, boost port, the boost port connect supercharging gasifier of unloading with gas phase mouth by pipeline respectively, further include BOG recycling compressions
Machine, multiple LNG surge tanks；
LNG storage tank is connect with LNG tank cars by feed liquor house steward and gas pipeline, and the feed liquor house steward unloads liquid mouth company with described
It connects, the gas pipeline is connect with the gas phase mouth of LNG tank cars, and feed liquor house steward is connected to gas pipeline by branch pipe, LNG storages
Tank, BOG recycle compressor, the gas phase mouth of LNG tank cars is sequentially communicated by pipeline so that the BOG in LNG storage tank can be through BOG
Recycling compressor enters in LNG tank cars；
Multiple LNG surge tanks are in parallel by pipeline with LNG storage tank, each LNG surge tanks respectively with BOG recycling compressor,
LNG storage tank is sequentially communicated to form forward and reverse two accesses by different pipelines, and the BOG in forward path in LNG surge tanks is logical
It crosses BOG recycling compressors and enters LNG storage tank, the BOG in backward channel in LNG storage tank recycles compressor by BOG and enters LNG
In surge tank；Each LNG surge tanks are also sequentially communicated with LNG filling machines, LNG storage tank by pipeline respectively；
It is both provided with valve on aforementioned each pipeline, to realize the LNG or BOG circulation route choosings when different working condition
It needs.
In the above-mentioned technical solutions, the valve on each pipeline is hand-operated valve and/or pneumatic operated valve, passes through control valve
Open and close realize the selection of different LNG BOG flow routes, hand-operated valve or pneumatic operated valve be easy to buy on the market, it is at low cost,
It is easy to operate.
Preferably, the quantity of the LNG surge tanks is two, and two LNG surge tanks can meet making for gas station
With demand, ensure the continuous of the continuous and LNG vehicle-mounted bottles filling of LNG filling machines precooling using double buffering tank.And two LNG bufferings
Tank is convenient for arranged, spatial design reasonable.
Preferably, the feed liquor house steward branches into two feed liquor branch pipes being connect with LNG storage tank so that feed liquor of unloading
More efficient, shortening is unloaded the time；It is both provided with hand-operated valve and pneumatic operated valve on described two feed liquor branch pipes, it is easy to use.
Preferably, the BOG recycling compressor is that low temperature recycles compressor, and work efficiency is high, technology maturation, is easy
It buys.
Preferably, pressure sensor and liquid level sensor are provided in the LNG storage tank, LNG surge tanks are returned with BOG
It receives on the pipeline between compressor and is provided with temperature sensor on the pipeline between LNG and storage tank LNG surge tanks.Sensor
Use make the work of gas station obtain close real time monitoring, prevent mistake and accident occur, can accomplish accurate precision
Control ensures safety.
It is both provided with check valve on pipeline between the feed liquor house steward, LNG surge tanks and LNG filling machines, anti-backflow,
Ensure safety.
A kind of working method of the novel LNG gas stations of claim 1 to 7 any one of them, includes the following steps：
One, LNG unloads：
(1) self-balancing：Open the valve on the gas pipeline between LNG storage tank and LNG tank cars so that in LNG storage tank
BOG is entered by pipeline in LNG tank cars；(2) it recycles：After the completion of self-balancing, LNG storage tank-BOG recycling compressors-LNG is opened
The valve of tank car access closes other valves so that and the BOG in LNG storage tank is recovered to through BOG recycling compressors in LNG tank cars,
Pressure in LNG storage tank is further decreased, LNG slot interior pressures are increased；(3) from supercharging：Using unloading, supercharging gasifier realizes LNG
Tank car is pressurized certainly；(4) it unloads：When LNG slot interior pressures reach setting value, the valve opened in feed liquor house steward makes LNG slots
Interior LNG stream enters in LNG storage tank, and realization is unloaded；LNG tank cars can pass through the supercharging of supercharging gasifier or the profit of unloading during unloading
BOG in LNG storage tank is recycled to LNG tank cars with BOG recycling compressors and realizes supercharging；
Two, LNG is filled：
(1) LNG surge tanks fill and pressurize：Open the valve on the pipeline between LNG storage tank and one of LNG surge tanks
Door so that LNG stream enters in LNG surge tanks in LNG storage tank, when in LNG surge tanks pressure higher than pressure in LNG storage tank cause LNG without
When method flows into, BOG in LNG surge tanks is recycled in LNG storage tank using BOG recycling compressors, reduces and is pressed in LNG surge tanks
Power ensures the continuous of feed liquor；After liquid level is met the requirements in LNG surge tanks, stop feed liquor, compressor is recycled by LNG using BOG
BOG is recycled in LNG surge tanks in storage tank, by boost in pressure in LNG surge tanks to aerating pressure；It can be according to this step method
Pressurization is filled one by one to multiple LNG surge tanks；In LNG surge tank filling processes, gasifier can be pressurized by storage tank, LNG is stored up
Tank is pressurized；
(2) LNG filling machines are pre-chilled：It opens on one of LNG surge tanks-LNG filling machines-LNG storage tank path conduits
LNG in LNG surge tanks is delivered in LNG filling machines after cycle using pressure difference and is returned in LNG storage tank, to add to LNG by valve
Mechanism of qi is pre-chilled, and when pressure is relatively low in LNG surge tanks in precooling process, is returned BOG in LNG storage tank using BOG recycling compressors
It receives to LNG surge tanks, improves LNG buffer tank pressures；When LNG surge tanks liquid level is relatively low in precooling process, by LNG filling machines
Precooling switched to by another LNG surge tank feed flow by the LNG surge tank feed flows, while to the LNG surge tanks carry out LNG benefits
It fills；
(3) LNG filling machines fill：The valve on the pipeline between one of LNG surge tanks and LNG filling machines is opened,
LNG in LNG surge tanks is delivered in LNG filling machines using pressure difference and enters LNG vehicle-mounted bottles after metering, as LNG in filling process
When buffer tank pressure is relatively low, BOG in LNG storage tank is recycled in LNG surge tanks using BOG recycling compressors, improves LNG bufferings
Pressure tank；When LNG surge tanks liquid level is relatively low in filling process, the filling of LNG vehicle-mounted bottles is switched by the LNG surge tank feed flows
LNG supplements are carried out by LNG storage tank to by another LNG surge tank feed flow, while to first LNG surge tank.
The beneficial effects of the invention are as follows：The present invention replaces the latent liquid of LNG using low temperature BOG recycling compressors and LNG surge tanks
The LNG gas stations technique of pump, pressure is difficult to meet in some cases for avoidable LNG storage tank low liquid level evacuation and LNG immersed pumps
The problem of use.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Specific implementation mode
By way of example and in conjunction with the accompanying drawings, the invention will be further described：
1 novel LNG gas stations of embodiment
A kind of novel LNG gas stations as shown in Figure 1, mainly by LNG tank cars 1, LNG storage tank 2, LNG filling machines 3, storage tank
Supercharging gasifier 4, supercharging gasifier 5 of unloading, BOG recycling 6, two LNG surge tanks 7 of compressor form, and BOG recycles compressor 6
Compressor is recycled for low temperature.LNG storage tank 2 connects storage tank by pipeline and is pressurized gasifier 4, be provided on LNG tank cars 1 unload liquid mouth,
Gas phase mouth, boost port, boost port and gas phase mouth connect supercharging gasifier 5 of unloading by pipeline respectively.
LNG storage tank 2 is connect with LNG tank cars 1 by feed liquor house steward 8 and gas pipeline 9, feed liquor house steward 8 and LNG tank cars 1
The connection of liquid mouth is unloaded, gas pipeline 9 is connect with the gas phase mouth of LNG tank cars 1, and feed liquor house steward 8 and gas pipeline 9 pass through branch pipe 10
Connection, feed liquor house steward 8 branch into two feed liquor branch pipes 11 being connect with LNG storage tank 2, hand are both provided on two feed liquor branch pipes 11
Dynamic valve and pneumatic operated valve.LNG storage tank 2, BOG recycle compressor 6, the gas phase mouth of LNG tank cars 1 is sequentially communicated by pipeline so that LNG
BOG in storage tank 2 can recycle compressor 6 through BOG and enter in LNG tank cars 1.
Two LNG surge tanks 7 are in parallel by pipeline with LNG storage tank 2, and each LNG surge tanks 7 are recycled with BOG respectively to be compressed
Machine 6, LNG storage tank 2 are sequentially communicated to form forward and reverse two accesses by different pipelines, in forward path in LNG surge tanks 7
BOG compressor 6 recycled by BOG enter LNG storage tank 2, BOG in backward channel in LNG storage tank 2 passes through BOG recycling pressures
Contracting machine 6 enters in LNG surge tanks 7；Each LNG surge tanks 7 are also connected with LNG filling machines 3, LNG storage tank 2 by pipeline successively respectively
It is logical.
Pressure sensor 12 and liquid level sensor 13 are provided in LNG storage tank 2, LNG surge tanks 7 and BOG recycles compressor 6
Between pipeline on and the pipeline between LNG storage tank 2 and LNG surge tanks 7 on be provided with temperature sensor 14.Feed liquor house steward 8,
It is both provided with check valve on pipeline between LNG surge tanks 7 and LNG filling machines 3.
It is both provided with valve on above-mentioned each pipeline, to realize the LNG or BOG circulation route choosings when different working condition
It needs, the valve of setting mainly has：It is provided with the on pipeline between the boost port and supercharging gasifier 5 of unloading of LNG tank cars 1
One hand-operated valve 15a.On gas pipeline 9 the is disposed with to close to one end of LNG storage tank 2 from close to one end of LNG tank cars 1
Two hand-operated valve 15b, the 5th hand-operated valve 15e, the 4th pneumatic operated valve 16d.In feed liquor house steward 8 from close to one end of LNG tank cars 1 to by
One end of nearly LNG storage tank 2 is disposed with third hand-operated valve 15c, third check valve 17c.On two feed liquor branch pipes 11 respectively
It is provided with the second pneumatic operated valve 16b, third pneumatic operated valve 16c, hand-operated valve is additionally provided on feed liquor branch pipe 11.It is provided on branch pipe 10
4th hand-operated valve 15d.It is recycled in the 4th pneumatic operated valve 16d and BOG and is provided with the 13rd gas on the pipeline between the entrance of compressor 6
Dynamic valve 16m, the 14th pneumatic operated valve is provided on the pipeline for connecting the outlet that the 13rd pneumatic operated valve 16m and BOG recycles compressor 6
16n is recycled in connection gas pipeline 9 and BOG and is provided with the 7th hand-operated valve 15g on the pipeline between the entrance of compressor 6, even
It connects and is provided with the 6th hand-operated valve 15f on the pipeline between gas pipeline 9 and the outlet of BOG recycling compressors 6.LNG storage tank 2 with
It is provided with the first pneumatic operated valve 16a on total pipeline between two LNG surge tanks 7, total pipeline branches into that be separately connected two LNG slow
The branch pipeline for rushing tank 7 is respectively arranged with the 5th pneumatic operated valve 16e, the 9th pneumatic operated valve 16i, first on two branch pipelines
It is disposed with the tenth pneumatic operated valve 16j, the second check valve 17b on pipeline between LNG surge tank 7a and LNG filling machine 3,
It is disposed with the 6th pneumatic operated valve 16f, the first check valve 17a on pipeline between two LNG surge tank 7b and LNG filling machines 3.
It is provided with the 7th pneumatic operated valve 16g on pipeline between the entrance of 2nd LNG surge tanks 7b and BOG recycling compressor 6, is returned in BOG
It receives and is provided with the 8th pneumatic operated valve 16h on the pipeline between the outlet of compressor 6 and the 2nd LNG surge tanks 7b.It is buffered in the first LNG
It is provided with the 11st pneumatic operated valve 16k on pipeline between the entrance of tank 7a and BOG recycling compressor 6, compressor 6 is recycled in BOG
Outlet and the first LNG surge tanks 7a between pipeline on be provided with the 12nd pneumatic operated valve 16l, be pressurized in LNG storage tank 2 and storage tank
The 15th pneumatic operated valve 16o is provided on pipeline between gasifier 4.The working method of 2 novel LNG gas stations of embodiment
The work of the novel LNG gas stations of embodiment 1 includes mainly：LNG unloads, LNG is filled, LNG storage tank is pressurized
(it is in the open state to give tacit consent to each storage tank root valve).The groundwork method and step of the novel LNG gas stations of embodiment 1 is：
One, LNG unloads：
(1) self-balancing：Carry out which valve selection opens according to the liquid temperature in LNG tank cars 1, if liquid temperature is higher than setting
Value then opens the 5th hand-operated valve 15e, the second hand-operated valve 15b and the 4th pneumatic operated valve 16d, if liquid temperature is less than setting value, opens
Third hand-operated valve 15c, the 4th hand-operated valve 15d and the 4th pneumatic operated valve 16d so that BOG enters LNG slots by pipeline in LNG storage tank 2
In vehicle 1, on the one hand by pressure reduction in LNG storage tank 2, on the other hand pressure in LNG tank cars 1 is increased；(2) it recycles：When certainly flat
After the completion of weighing apparatus, the 5th hand-operated valve 15e is closed, opens the 6th hand-operated valve 15f and the 13rd pneumatic operated valve 16m, is recycled using low temperature BOG
BOG in LNG storage tank 2 is recovered in LNG tank cars 1 by compressor, further decreases pressure in LNG storage tank 2, is increased in LNG tank cars 1
Pressure；(3) from supercharging：First manual valve 15a, the second hand-operated valve 15b are opened, tank car booster is entered to LNG in LNG tank cars 1
Gasify, realizes tank car from supercharging；(4) it unloads：When pressure is higher in LNG tank cars 1, third hand-operated valve 15c and the is opened
LNG stream enters in LNG storage tank 2 in two pneumatic operated valve 16b, third pneumatic operated valve 16c, LNG tank car 1, and realization is unloaded.LNG during unloading
Tank car 1 is pressurized：It, on the one hand can be by opening first manual valve in order to keep the pressure in LNG tank cars 1 during unloading
After 15a, the second hand-operated valve 15b, realize that tank car from being pressurized, on the other hand can open the 6th hand using supercharging gasifier 5 of unloading
Dynamic valve 15f and the 4th pneumatic operated valve 16d, the 13rd pneumatic operated valve 16m are returned BOG in LNG storage tank 2 using low temperature BOG recycling compressors
It receives to LNG tank cars 1 and realizes.(5) after the completion of unloading, the second hand-operated valve 15b, the 7th hand-operated valve 15g is opened, is remained in LNG tank cars 1
BOG entered in LNG storage tank 2 by the 14th pneumatic operated valve 16n.
Two, LNG is filled：
(1) the first LNG surge tanks 7a fills and pressurizes
1) the first LNG surge tank 7a slack tanks fill：The first pneumatic operated valve 16a, the 9th pneumatic operated valve 16i are opened, due to LNG storage tank
Pressure is higher in 2, so LNG stream enters in the first LNG surge tanks 7a in LNG storage tank 2, when in the first LNG surge tanks 7a pressure compared with
When height leads to that LNG cannot further flow into LNG storage tank 2, the 4th pneumatic operated valve 16d, the 11st pneumatic operated valve 16k, the 14th are opened
BOG in first LNG surge tanks 7a is recycled in LNG storage tank 2, to drop by pneumatic operated valve 16n using low temperature BOG recycling compressors
Pressure in low first LNG surge tanks 7a, to ensure the continuous of feed liquor.After liquid level is met the requirements in the first LNG surge tanks 7a, close
The first pneumatic operated valve 16a, the 9th pneumatic operated valve 16i are closed, and opens the 4th pneumatic operated valve 16d, the 12nd pneumatic operated valve 16l, the 13rd pneumatically
BOG in LNG storage tank 2 is recycled in the first LNG surge tanks 7a using low temperature BOG recycling compressors, the first LNG is delayed by valve 16m
Boost in pressure is rushed in tank 7a to aerating pressure.
2) it is filled in the first LNG surge tank 7a operational process：Open the 4th pneumatic operated valve 16d, the 11st pneumatic operated valve 16k,
BOG in first LNG surge tanks 7a is recycled in LNG storage tank 2 using low temperature BOG recycling compressors, is dropped by 14 pneumatic operated valve 16n
Pressure in low first LNG surge tanks 7a opens the first pneumatic operated valve 16a, the 9th pneumatic operated valve when its pressure is less than LNG storage tank 2
16i, since pressure is higher in LNG storage tank 2, so LNG stream enters in the first LNG surge tanks 7a in LNG storage tank 2.When the first LNG is slow
It rushes in tank 7a after liquid level is met the requirements, closes the first pneumatic operated valve 16a, the 9th pneumatic operated valve 16i, and open the 4th pneumatic operated valve 16d, the
BOG in LNG storage tank 2 is recycled to first by 12 pneumatic operated valve 16l, the 13rd pneumatic operated valve 16m using low temperature BOG recycling compressors
In LNG surge tanks 7a, by boost in pressure in the first LNG surge tanks 7a to aerating pressure.
(2) the 2nd LNG surge tanks 7b fill and pressurize
1) the 2nd LNG surge tank 7b slack tanks fill：The first pneumatic operated valve 16a, the 5th pneumatic operated valve 16e are then opened, since LNG is stored up
Pressure is higher in tank 2, so LNG stream enters in the 2nd LNG surge tanks 7b in LNG storage tank 2, when pressure in the 2nd LNG surge tanks 7b
It is higher when leading to that LNG cannot further flow into LNG storage tank 2, open the 4th pneumatic operated valve 16d, the 7th pneumatic operated valve 16g, the 14th
BOG in 2nd LNG surge tanks 7b is recycled in LNG storage tank 2, to drop by pneumatic operated valve 16n using low temperature BOG recycling compressors
Pressure in low 2nd LNG surge tanks 7b, to ensure the continuous of feed liquor.After liquid level is met the requirements in the 2nd LNG surge tanks 7b, close
The first pneumatic operated valve 16a, the 5th pneumatic operated valve 16e are closed, and opens the 4th pneumatic operated valve 16d, the 8th pneumatic operated valve 16h, the 13rd pneumatic operated valve
BOG in LNG storage tank 2 is recycled in the 2nd LNG surge tanks 7b using low temperature BOG recycling compressors, the 2nd LNG is buffered by 16m
Boost in pressure is to aerating pressure in tank 7b.
2) it is filled in the 2nd LNG surge tank 7b operational process：Open the 4th pneumatic operated valve 16d, the 7th pneumatic operated valve 16g, the tenth
BOG in 2nd LNG surge tanks 7b is recycled in LNG storage tank 2 using low temperature BOG recycling compressors, is reduced by four pneumatic operated valve 16n
Pressure in 2nd LNG surge tanks 7b opens the first pneumatic operated valve 16a, the 5th pneumatic operated valve 16e when its pressure is less than LNG storage tank 2,
Since pressure is higher in LNG storage tank 2, so LNG stream enters in the first LNG surge tanks 7a in LNG storage tank 2.When the 2nd LNG surge tanks
After liquid level is met the requirements in 7b, the first pneumatic operated valve 16a, the 5th pneumatic operated valve 16e are closed, and open the 4th pneumatic operated valve 16d, the 8th gas
BOG in LNG storage tank 2 is recycled to the 2nd LNG using low temperature BOG recycling compressors and buffered by dynamic valve 16h, the 13rd pneumatic operated valve 16m
In tank 7b, by boost in pressure in the 2nd LNG surge tanks 7b to aerating pressure.
In technical process, when need to allow pressure increase in LNG storage tank 2 when, open the 15th pneumatic operated valve 16o, LNG storage tank
LNG stream enters storage tank supercharging gasifier 4 in 2, realizes storage tank from supercharging.
(3) LNG filling machines 3 are pre-chilled：When LNG filling machines 3 are pre-chilled, the second pneumatic operated valve 16b, the tenth pneumatic operated valve 16j are opened,
Since the first LNG surge tank 7a pressure is higher than LNG storage tank 2, LNG in the first LNG surge tanks 7a is delivered to LNG using pressure difference and is added
2 bottom of LNG storage tank is returned to after being recycled in mechanism of qi 3, to be pre-chilled to LNG filling machines 3, when the first LNG surge tanks in precooling process
When 7a pressure is relatively low, the 4th pneumatic operated valve 16d, the 12nd pneumatic operated valve 16l, the 13rd pneumatic operated valve 16m are opened, is returned using low temperature BOG
It receives compressor BOG in LNG storage tank 2 is recycled in the first LNG surge tanks 7a, improves the first LNG surge tank 7a pressure.Work as precooling
When the first LNG surge tank 7a liquid levels are relatively low in the process, the 6th pneumatic operated valve 16f is opened, and simultaneously close off the tenth pneumatic operated valve 16j, it will
The precooling of LNG filling machines 3 switches to the 2nd LNG surge tank 7b by the first LNG surge tank 7a feed flows, while being buffered to the first LNG
Tank 7a carries out LNG supplements using 1) method.When the 2nd LNG surge tank 7b pressure or relatively low liquid level, buffered according to the first LNG
The method of operation that tank 7a goes wrong switches over, repeatedly.Ensure the continuous of 3 precooling of LNG filling machines using double buffering tank.
(4) LNG filling machines 3 fill：It is similar it to be pre-chilled pattern with LNG filling machines 3, when LNG 3 aeratings of filling machine, opens the
Two pneumatic operated valve 16b, the tenth pneumatic operated valve 16j, since the first LNG surge tank 7a pressure is higher than LNG vehicle-mounted bottles, using pressure difference by first
LNG, which is delivered in LNG filling machines 3, in LNG surge tanks 7a enters LNG vehicle-mounted bottles after metering, to be filled to LNG vehicle-mounted bottles, when
When the first LNG surge tank 7a pressure is relatively low in filling process, the 4th pneumatic operated valve 16d, the 12nd pneumatic operated valve 16l, the 13rd are opened
BOG in LNG storage tank 2 is recycled in the first LNG surge tanks 7a by pneumatic operated valve 16m using low temperature BOG recycling compressor, improves the
One LNG surge tank 7a pressure.When the first LNG surge tank 7a liquid levels are relatively low in filling process, the 6th pneumatic operated valve 16f is opened, and
The tenth pneumatic operated valve 16j is simultaneously closed off, the filling of LNG vehicle-mounted bottles is switched into the 2nd LNG bufferings by the first LNG surge tank 7a feed flows
Tank 7b, while LNG supplements are carried out using the method for front to the first LNG surge tanks 7a.When the 2nd LNG surge tank 7b pressure or liquid
When position is relatively low, switched over according to the first LNG surge tanks 7a methods of operation to go wrong, repeatedly.Utilize double buffering tank
Ensure the continuous of LNG vehicle-mounted bottles filling.
Liquid level, pressure and temperature sensor detection and chain control operation in each technological process operational process.
Claims (8)
1. a kind of novel LNG gas stations, including LNG tank cars, LNG storage tank, LNG filling machines, storage tank supercharging gasifier, supercharging of unloading
Gasifier, the LNG storage tank connect storage tank by pipeline and are pressurized gasifier, be provided on the LNG tank cars and unload liquid mouth, gas phase
Mouth, boost port, the boost port connect supercharging gasifier of unloading with gas phase mouth by pipeline respectively, it is characterised in that：Further include
BOG recycles compressor, multiple LNG surge tanks；
LNG storage tank is connect with LNG tank cars by feed liquor house steward and gas pipeline, and the feed liquor house steward is connect with the liquid mouth that unloads,
The gas pipeline is connect with the gas phase mouth of LNG tank cars, and feed liquor house steward is connected to gas pipeline by branch pipe, LNG storage tank,
BOG recycles compressor, the gas phase mouth of LNG tank cars is sequentially communicated by pipeline so that the BOG in LNG storage tank can be recycled through BOG
Compressor enters in LNG tank cars；
Multiple LNG surge tanks are in parallel by pipeline with LNG storage tank, and each LNG surge tanks are stored up with BOG recycling compressor, LNG respectively
Tank is sequentially communicated to form forward and reverse two accesses by different pipelines, and the BOG in forward path in LNG surge tanks passes through BOG
Recycling compressor enters LNG storage tank, and the BOG in backward channel in LNG storage tank recycles compressor by BOG and enters LNG bufferings
In tank；Each LNG surge tanks are also sequentially communicated with LNG filling machines, LNG storage tank by pipeline respectively；
It is both provided with valve on aforementioned each pipeline, to realize the LNG or BOG circulation route choosing need when different working condition
It wants.
2. novel LNG gas stations as described in claim 1, it is characterised in that：Valve on each pipeline be hand-operated valve and/
Or pneumatic operated valve.
3. novel LNG gas stations as described in claim 1, it is characterised in that：The quantity of the LNG surge tanks is two.
4. novel LNG gas stations as described in claim 1, it is characterised in that：The feed liquor house steward is branched into be connected with LNG storage tank
The two feed liquor branch pipes connect are both provided with hand-operated valve and pneumatic operated valve on described two feed liquor branch pipes.
5. novel LNG gas stations as described in claim 1, it is characterised in that：The BOG recycling compressor is low temperature recycling pressure
Contracting machine.
6. novel LNG gas stations as described in claim 1, it is characterised in that：It is provided with pressure sensor in the LNG storage tank
And liquid level sensor, LNG surge tanks and BOG are recycled on the pipeline between compressor and between LNG storage tank and LNG surge tanks
Temperature sensor is provided on pipeline.
7. novel LNG gas stations as described in claim 1, it is characterised in that：The feed liquor house steward, LNG surge tanks and LNG add
It is both provided with check valve on pipeline between mechanism of qi.
8. a kind of working method of the novel LNG gas stations of claim 1 to 7 any one of them, it is characterised in that：Including as follows
Step：
One, LNG unloads：
(1) self-balancing：Open the valve on the gas pipeline between LNG storage tank and LNG tank cars so that the BOG in LNG storage tank is logical
Piping enters in LNG tank cars；(2) it recycles：After the completion of self-balancing, opens LNG storage tank-BOG and recycle compressor-LNG tank cars
The valve of access closes other valves so that the BOG in LNG storage tank is recovered to through BOG recycling compressors in LNG tank cars, into one
Step reduces pressure in LNG storage tank, increases LNG slot interior pressures；(3) from supercharging：Using unloading, supercharging gasifier realizes LNG tank cars
From supercharging；(4) it unloads：When LNG slot interior pressures reach setting value, the valve opened in feed liquor house steward makes in LNG tank cars
LNG stream enters in LNG storage tank, and realization is unloaded；LNG tank cars can pass through the supercharging of supercharging gasifier or the utilization of unloading during unloading
BOG recycles compressor and BOG in LNG storage tank is recycled to the realization supercharging of LNG tank cars；
Two, LNG is filled：
(1) LNG surge tanks fill and pressurize：The valve opened on the pipeline between LNG storage tank and one of LNG surge tanks makes
It obtains LNG stream in LNG storage tank to enter in LNG surge tanks, when pressure causes LNG that can not flow higher than pressure in LNG storage tank in LNG surge tanks
It is fashionable, BOG in LNG surge tanks is recycled in LNG storage tank using BOG recycling compressors, pressure in LNG surge tanks is reduced, protects
Demonstrate,prove the continuous of feed liquor；After liquid level is met the requirements in LNG surge tanks, stop feed liquor, compressor is recycled by LNG storage tank using BOG
Interior BOG is recycled in LNG surge tanks, by boost in pressure in LNG surge tanks to aerating pressure；It can be according to this step method to more
A LNG surge tanks fill pressurization one by one；In LNG surge tank filling processes, gasifier can be pressurized by storage tank, LNG storage tank is increased
Pressure；
(2) LNG filling machines are pre-chilled：The valve on one of LNG surge tanks-LNG filling machines-LNG storage tank path conduits is opened,
LNG in LNG surge tanks is delivered in LNG filling machines after cycle using pressure difference and is returned in LNG storage tank, to give LNG filling machines
BOG in LNG storage tank is recycled to when pressure is relatively low in LNG surge tanks in precooling process using BOG recycling compressors by precooling
In LNG surge tanks, LNG buffer tank pressures are improved；When LNG surge tanks liquid level is relatively low in precooling process, by the pre- of LNG filling machines
It is cold to be switched to by another LNG surge tank feed flow by the LNG surge tank feed flows, while LNG supplements are carried out to the LNG surge tanks；
(3) LNG filling machines fill：The valve on the pipeline between one of LNG surge tanks and LNG filling machines is opened, is utilized
LNG in LNG surge tanks is delivered in LNG filling machines by pressure difference enters LNG vehicle-mounted bottles after metering, when LNG is buffered in filling process
When pressure tank is relatively low, BOG in LNG storage tank is recycled in LNG surge tanks using BOG recycling compressors, improves LNG surge tank pressures
Power；When LNG surge tanks liquid level is relatively low in filling process, by the filling of LNG vehicle-mounted bottles by the LNG surge tank feed flows switch to by
Another LNG surge tank feed flow, while LNG supplements are carried out by LNG storage tank to first LNG surge tank.
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| CN108799825A (en) * | 2018-09-03 | 2018-11-13 | 张家港富瑞深冷科技有限公司 | LNG tank formula container charging system |
| CN110736026A (en) * | 2019-10-24 | 2020-01-31 | 邳州亚联环保科技有限公司 | residual liquid recycling system |
| CN110792925A (en) * | 2019-11-15 | 2020-02-14 | 辽宁忠旺集团有限公司 | Self-pressurization gas supply system and gas supply method |
| CN111306440A (en) * | 2018-12-12 | 2020-06-19 | 张家港中集圣达因低温装备有限公司 | Liquid discharge metering device |
| CN111336403A (en) * | 2020-03-30 | 2020-06-26 | 日照海达尔加气设备有限公司 | Filling method of micro-power-consumption low-temperature liquid filling system |
| CN111457246A (en) * | 2020-04-01 | 2020-07-28 | 江苏国富氢能技术装备有限公司 | Hydrogen storage type hydrogen filling station |
| CN112460476A (en) * | 2019-09-09 | 2021-03-09 | 安瑞科(廊坊)能源装备集成有限公司 | LNG filling device and filling method |
| CN112460474A (en) * | 2019-09-09 | 2021-03-09 | 安瑞科(廊坊)能源装备集成有限公司 | LNG filling device and filling method |
| WO2023096972A1 (en) * | 2021-11-23 | 2023-06-01 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Liquid hydrogen trailer loading procedure for hydrogen and refrigeration recovery |
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| CN111336403A (en) * | 2020-03-30 | 2020-06-26 | 日照海达尔加气设备有限公司 | Filling method of micro-power-consumption low-temperature liquid filling system |
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| CN111457246A (en) * | 2020-04-01 | 2020-07-28 | 江苏国富氢能技术装备有限公司 | Hydrogen storage type hydrogen filling station |
| WO2023096972A1 (en) * | 2021-11-23 | 2023-06-01 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Liquid hydrogen trailer loading procedure for hydrogen and refrigeration recovery |
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