CN108150825A - The pre-cooler of low temperature ultra-large type LNG tank - Google Patents
The pre-cooler of low temperature ultra-large type LNG tank Download PDFInfo
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- CN108150825A CN108150825A CN201711405208.1A CN201711405208A CN108150825A CN 108150825 A CN108150825 A CN 108150825A CN 201711405208 A CN201711405208 A CN 201711405208A CN 108150825 A CN108150825 A CN 108150825A
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- interface
- low temperature
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- natural gas
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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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
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
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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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/082—Pipe-line systems for liquids or viscous products for cold fluids, e.g. liquefied gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention relates to a kind of pre-coolers of low temperature ultra-large type LNG tank, and the liquefied natural gas in LNG tank is added in liquefied natural gas bottle, and described device includes two-way low temperature compression device, flowmeter, control valve；Fueling process includes precooling, aerating, return-air process；The BOG in liquefied natural gas bottle is extracted out using compressor, and under the action of pressure differential, the liquefied natural gas liquid in storage tank is flowed into liquefied natural gas bottle, and after liquefied natural gas liquid filling is completed, then the BOG extracted in storage tank is added in gas cylinder；The present invention does not use LNG pump and bulky pump pond, liquefied natural gas in storage tank is after metering directly to liquefied natural gas bottle aerating, connection LNG tank can work independently, and have many advantages, such as simple in structure, at low cost, low in energy consumption, installation, easy to operate, zero-emission；Improve processing safety and metering accuracy.
Description
Technical field
The present invention relates to natural gas technical field more particularly to a kind of pre- cold charges of low temperature ultra-large type LNG tank
It puts.
Background technology
Country's liquefied natural gas aerating machine is all a metering device at present, it cannot work independently, and needs outer set low
Temperature pump pumps out liquefied natural gas (LNG) from LNG tank, then by the metering device of liquefied natural gas aerating machine to
Refueling.Liquefied natural gas is pressurized using pump in this aerating flow, refueling, pump are sent out at work after metering
Heat, heat enter in LNG liquefied natural gas volatilization gas (BOG) amount that increases, while in order to which cold insulation needs to carry out absolutely pump again
Heat and use vacuum pump pond, vacuum pump pond needs mating safety devices again, therefore there is system complex, of high cost, BOG productions
The defects of raw amount is big, loss is high.Due to pump can only pressurized liquid, LNG liquid can only be also filled into automobile, can not will be stored up
BOG in tank is filled, therefore polluted ring the phenomenon that row's natural gas outside current liquefied natural gas filling station generally existing
Border increases insecurity, increases loss；Simultaneously because vacuum pump pond body product is larger, it is difficult to will pump as fuel charger
In filling machine.In addition to improving metering accuracy, need the LNG hoses (filling cryogenic liquid) is pre-chilled before aerating,
Therefore the rifle after being pre-chilled is bad when being connected with hose with automobile to be operated and has certain danger, and there are hoses to be hardened, and low temperature rifle is easy
The phenomenon that condensing the water freezing in air, and cause poorly sealed.
Invention content
The purpose of the invention is to overcome the deficiencies of the prior art and provide low temperature ultra-large type LNG tank
Pre-cooler.
The present invention is to be achieved through the following technical solutions：
A kind of pre-cooler of low temperature ultra-large type LNG tank, by the liquefied natural gas in LNG tank
It adds in liquefied natural gas bottle, including two-way low temperature compression device, flowmeter, the liquefied natural gas aerating machine is equipped with and liquid
Change natural gas storage tank liquid outlet connection liquid phase interface, connect with the gas phase mouth of LNG tank gas phase interface, and
The return-air rifle interface of return-air rifle connection, the liquid feeding rifle interface that is connect with liquid feeding rifle, there are two the two-way low temperature compression device is set
Interface：A interfaces, B interface, two-way low temperature compression device make BOG from A interfaces flow into it is pressurized from B interface export or make BOG from B
Interface inflow is pressurized to be exported from A interfaces, and the flowmeter includes gas source and flow amount meter, return-air flowmeter, the return-air flowmeter
The type double flow meter of gas cylinder connecting pin and low temperature compression connecting pin is provided with, described in the air source liquid phase interface is connected by pipeline
The entrance of gas source and flow amount meter, the outlet of gas source and flow amount meter are connect by being equipped with the pipeline connection liquid feeding rifle of a liquid feeding control valve
Mouthful, the outlet of gas source and flow amount meter also connects the A of the two-way low temperature compression device by being equipped with the pipeline of a pre- subcooling control valve
Interface, liquid feeding rifle interface also connect the gas cylinder connecting pin of the return-air flowmeter by pipeline, in the connection liquid feeding rifle interface
Return-air control valve is equipped with the pipeline of return-air flowmeter, the return-air rifle interface connects back to the gas of air-flow gauge also by pipeline
Bottle connecting pin, being equipped on the pipeline for connecting back to air gun interface and return-air flowmeter makes medium be flowed to back from return-air rifle interface
The check-valves of air-flow gauge, the low temperature compression connecting pin of the return-air flowmeter connect two-way low temperature compression device also by pipeline
A interfaces, the B interface of the two-way low temperature compression device connects the gas phase interface, the two-way low temperature compression by pipeline
Device includes compressor, cool exchanger, reversal valve；The cool exchanger is equipped with C interface, D interface, E interface, F interface, cold all the way
Exchange media flows through cool exchanger by the C interface and D interface, and the cold exchange media of another way passes through the E interface and F interface
Cool exchanger is flowed through, the C interface of the cool exchanger connects the A interfaces of the two-way low temperature compression device, the cool exchanger
E interface connect the B interface of the two-way low temperature compression device；The reversal valve is defeated including positive interface, contradirectional interface, compression
Incoming interface, compression output interface, the D interface and F interface of the cool exchanger connect respectively the reversal valve positive interface and
Contradirectional interface, the compression input interface of the reversal valve connect the input port of the compressor, the compression output interface of reversal valve
The delivery outlet of connect compressor.
Further, cool exchanger is tubular type cool exchanger or shell-and-tube cool exchanger or board-like cool exchanger or plate-fin
One kind of cool exchanger.
Further, the cool exchanger is by tubular type cool exchanger or shell-and-tube cool exchanger or board-like cool exchanger or plate
The cool exchanger that wing formula cool exchanger is composed.
Further, the reversal valve is two position four-way valves, and a valve position of reversal valve connects the forward direction of reversal valve
Mouth is connected with compression input interface, contradirectional interface is connected with compression output interface；Another valve position of reversal valve makes reversal valve
Positive interface is connected with compression output interface, contradirectional interface is connected with compression input interface.
Further, the reversal valve is to be combined to form by two triple valves, the interface connection of first triple valve
The D interface connection of cool exchanger, the input port of other two interface difference connect compressor of first triple valve and delivery outlet；
The F interface connection of the interface connection cool exchanger of second triple valve, other two interface of second triple valve also divide
The input port of other connect compressor and delivery outlet.
Further, the gas source and flow amount meter and return-air flowmeter be the flow that can measure liquefied natural gas, density and
The flowmeter of temperature.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention extracts liquefied natural gas gas out using compressor
BOG in bottle makes the pressure in gas cylinder be less than the pressure of gas station LNG tank, under the action of pressure differential, storage tank
In liquefied natural gas liquid flow into liquefied natural gas bottle in；The BOG of extraction is transported to the LNG tank of gas station
In temporarily store, after liquefied natural gas liquid filling is completed, then extract BOG in storage tank and add in gas cylinder；LNG is not used
Pump and bulky pump pond, the liquefied natural gas in storage tank is after metering directly to liquefied natural gas bottle aerating, connection liquefaction day
Right gas storage tank can work independently, and have many advantages, such as simple in structure, at low cost, low in energy consumption, installation, easy to operate, zero-emission；
Improve processing safety and metering accuracy.
Description of the drawings
Fig. 1 is structure principle chart of the present invention, wherein two-way low temperature compression device is commutated using tubular type cool exchanger and four-way
Valve；
Fig. 2 is structure principle chart of the present invention using the two-way low temperature compression device of shell-and-tube cool exchanger；
Fig. 3 is structure principle chart of the present invention using the two-way low temperature compression device of board-like cool exchanger；
Fig. 4 is structure principle chart of the present invention using the two-way low temperature compression device of plate-fin cool exchanger；
Fig. 5 is the present invention using tubular type and the structural principle of the two-way low temperature compression device of the cool exchanger of board-like combination
Figure；
Fig. 6 is the structure principle chart for the two-way low temperature compression device that the present invention forms reversal valve using double triple valves；
Fig. 7 is the schematic diagram of present invention precooling operation；
Fig. 8 is the schematic diagram of aerating operation of the present invention；
Fig. 9 is the schematic diagram of return-air operation of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Please refer to Fig.1 with a kind of pre-cooler of low temperature ultra-large type LNG tank shown in Fig. 2, will liquefaction it is natural
Liquefied natural gas in gas storage tank is added in liquefied natural gas bottle, including two-way low temperature compression device 10, flowmeter；The liquid
Change natural gas aerating machine to be equipped with the air source liquid phase interface 21 connecting with the liquid outlet of LNG tank, store up with liquefied natural gas
The gas phase interface 22 of the gas phase mouth connection of tank, the return-air rifle interface 23 being connect with return-air rifle, the liquid feeding rifle being connect with liquid feeding rifle connect
Mouth 24；
The two-way low temperature compression device is set there are two interface：A interfaces (figure label A), B interface (figure label B), it is double
To low temperature compression device make liquefied natural gas from A interfaces flow into it is pressurized from B interface export or make liquefied natural gas from B interface
Flow into the pressurized device exported from A interfaces；
The flowmeter includes gas source and flow amount meter 31, return-air flowmeter 32, and the return-air flowmeter is provided with gas cylinder connection
Hold the type double flow meter of 32a and low temperature compression connecting pin 32b；
The air source liquid phase interface connects the entrance of the gas source and flow amount meter by pipeline, and the outlet of gas source and flow amount meter passes through
Pipeline equipped with a liquid feeding control valve 41 connects the liquid feeding rifle interface, and the outlet of gas source and flow amount meter is also pre- by being equipped with one
The pipeline of subcooling control valve 42 connects the A interfaces of the two-way low temperature compression device；
Liquid feeding rifle interface also connects the gas cylinder connecting pin of the return-air flowmeter by pipeline, is connect in the connection liquid feeding rifle
The pipeline of mouth and return-air flowmeter is equipped with return-air control valve 43；
The return-air rifle interface connects back to the gas cylinder connecting pin of air-flow gauge also by pipeline, is connect in the air gun that connects back to
The pipeline of mouth and return-air flowmeter is equipped with the check-valves 52 that medium is made to flow to return-air flowmeter from return-air rifle interface；
The low temperature compression connecting pin of the return-air flowmeter connects the A interfaces of two-way low temperature compression device also by pipeline；
The B interface of the two-way low temperature compression device connects the gas phase interface by pipeline；
The two-way low temperature compression device includes cool exchanger 11, reversal valve 12, compressor 13；The cool exchanger is equipped with
C interface (label is in figure), D interface (label is in figure), E interface (label is in figure), F interface (label is in figure),
Cold exchange media flows through cool exchanger by the C interface and D interface all the way, and the cold exchange media of another way passes through the E interface
Cool exchanger is flowed through with F interface, the C interface of the cool exchanger connects the A interfaces of the two-way low temperature compression device, described cold
The E interface of exchanger connects the B interface of the two-way low temperature compression device；The reversal valve includes positive interface and (is marked in figure
For+), contradirectional interface (in figure label be), compression input interface (label is in figure), compression output interface (in figure label for
U)。
The D interface and F interface of the cool exchanger connect the positive interface and contradirectional interface of the reversal valve respectively；It is described
The compression input interface of reversal valve connects the input port of the compressor, and reversal valve compresses the defeated of output interface connect compressor
Outlet.
The cool exchanger is the heat exchanger replaced for cold energy, and in the present embodiment, cool exchanger is a tubular type heat
Exchanger, hereon referred to as tubular type cool exchanger；Reversal valve is two position four-way valves, and a valve position of reversal valve makes reversal valve
Positive interface is connected with compression input interface, contradirectional interface is connected with compression output interface；Another valve position of reversal valve makes to change
To the positive interface of valve is connected with compression output interface, contradirectional interface is connected with compression input interface.
The gas source and flow amount meter and return-air flowmeter are the flows of the flow that can measure liquefied natural gas, density and temperature
Meter.
Safety valve 61 is equipped on the pipeline of connection gas phase interface, is connecting pre- subcooling control valve and two-way low temperature compression device
The pipeline of A interfaces is equipped with safety valve 62, and safety valve 63 is equipped on the pipeline of connection liquid feeding rifle interface.
Embodiment two：
The present embodiment is a kind of replaceable structure of two-way low temperature compression device in embodiment one.
Such as Fig. 2, in the two-way low temperature compression device, the cool exchanger is a shell-and-tube cool exchanger 11a.Institute
State cool exchanger and be the heat exchanger replaced for cold energy, in the present embodiment, cool exchanger is a shell-and-tube exchanger,
Referred to herein as shell-and-tube cool exchanger.
Embodiment three：
The present embodiment is a kind of replaceable structure of two-way low temperature compression device in embodiment one.
Such as Fig. 3, in the two-way low temperature compression device, the cool exchanger is a platen type cool exchanger 11b.It is described
Cool exchanger is the heat exchanger replaced for cold energy, and in the present embodiment, cool exchanger is a platen type heat exchanger, referred herein to
For board-like cool exchanger.
Example IV：
The present embodiment is a kind of replaceable structure of two-way low temperature compression device in embodiment one.
Such as Fig. 4, in the two-way low temperature compression device, the cool exchanger is a plate-fin cool exchanger 11c.Institute
State cool exchanger and be the heat exchanger replaced for cold energy, in the present embodiment, cool exchanger is a plate fin type heat exchanger,
Referred to herein as plate-fin cool exchanger.
Embodiment five：
The present embodiment is a kind of replaceable structure of two-way low temperature compression device in embodiment one.
In the two-way low temperature compression device, the cool exchanger by tubular type cool exchanger or shell-and-tube cool exchanger or
The cool exchanger that board-like cool exchanger or plate-fin cool exchanger are composed.
Such as Fig. 5, in this implementation, cool exchanger is combined by a tubular type cool exchanger 11d and a platen type cool exchanger 11b
The cool exchanger formed.The cool exchanger is the heat exchanger replaced for cold energy, and in the present embodiment, cool exchanger is by one
The cool exchanger that tubing heat exchanger 11d and a platen type heat exchanger 11b are composed.
Embodiment six：
The present embodiment is a kind of replaceable structure of two-way low temperature compression device in embodiment one.
Such as Fig. 6, in the two-way low temperature compression device, the reversal valve is to be combined to form by two triple valves, first
The D interface connection of the interface connection cool exchanger of a triple valve 12a, other two interface of first triple valve connect respectively
Connect input port and the delivery outlet of compressor；The F interface connection of the interface connection cool exchanger of second triple valve 12b, the
Other two interface of two triple valves also distinguishes input port and the delivery outlet of connect compressor.
Embodiment seven：
Such as Fig. 7, a kind of liquefied natural gas adding method, in liquefied natural gas filling station, using one described in embodiment one
Liquefied natural gas in LNG tank is added in liquefaction day by liquefied natural gas aerating machine of the kind with low temperature compression device
In right gas bottle.Liquefied natural gas and BOG are stored simultaneously in LNG tank and liquefied natural gas bottle, it is described
BOG is liquefied natural gas volatilization gas.
As described in embodiment one, the filling machine includes two-way low temperature compression device 10, flowmeter；The liquefied natural gas
Filling machine is equipped with the air source liquid phase interface 21 being connect with the liquid outlet of LNG tank, the gas phase with LNG tank
The gas phase interface 22 of mouth connection, the return-air rifle interface 23 being connect with return-air rifle, the liquid feeding rifle interface 24 being connect with liquid feeding rifle；
The two-way low temperature compression device is set there are two interface：A interfaces (figure label A), B interface (figure label B), it is double
To low temperature compression device make liquefied natural gas from A interfaces flow into it is pressurized from B interface export or make liquefied natural gas from B interface
Flow into the pressurized device exported from A interfaces；The step of the method, includes：
A. liquid feeding rifle is made to connect the liquid feeding rifle interface 24 of the liquefied natural gas aerating machine and adding for liquefied natural gas bottle
Liquid mouth makes return-air rifle connect 23 interface of return-air rifle interface of the liquefied natural gas aerating machine and the return-air of liquefied natural gas bottle
Mouthful；
B. the measured value of return-air flowmeter is recorded.Start the two-way low temperature compression device, including：Start compressor 13；
The valve position of reversal valve 12 is set as：The positive interface (+) of reversal valve is made connect with compression input interface (I), contradirectional interface (-) and
Output interface (U) is compressed to connect；Two-way low temperature compression device makes liquefied natural gas be flowed into from A interfaces, is pressurized defeated from B interface
Go out；
C. it closes liquid feeding control valve 41, close return-air control valve 43, open pre- subcooling control valve 42, in LNG tank
Liquefied natural gas flow into natural gas aerating machine from the air source liquid phase interface, entered through the gas source and flow amount meter by A interfaces it is double
To low temperature compression device, pressurized from B interface output, by the gas phase interface of natural gas aerating machine to flow back into liquefaction natural
In gas storage tank；BOG in liquefied natural gas bottle flows into natural gas aerating machine from return-air rifle interface, flows through and connects back to air gun interface
With on the pipeline of return-air flowmeter check-valves, return-air flowmeter, two-way low temperature compression device, pressurized from B entered by A interfaces
Interface output is flowed by the gas phase interface of natural gas aerating machine in LNG tank.
The operation of this step is to realize the precooling of liquefied natural gas aerating machine；Return-air flowmeter moment detection temperature, density
Etc. parameters, judge precooling whether reach sets requirement, hence into aerated form.Meanwhile in precooling process, liquefied natural gas
BOG cooled via return airs rifle, two-way low temperature compression device in gas cylinder are transported in LNG storage tank, the pressure reduction of liquefied natural gas bottle,
Aerating for next step is ready.
D. such as Fig. 8, when flowing through the state of BOG of return-air flowmeter in step c and reaching sets requirement, precooling control is closed
Valve records the measured value of gas source and flow amount meter.In the present embodiment, the state sets requirement for flowing through the BOG of return-air flowmeter is：
The density of BOG is more than 0.2 cubic metre/milligram, the temperature of BOG is less than -120 DEG C.
E. liquid feeding control valve is opened, the BOG in liquefied natural gas bottle continues under the action of two-way low temperature compression device
It is flowed into LNG tank through gas phase interface, the liquefied natural gas in LNG tank adds through the liquid feeding rifle interface
Enter in liquefied natural gas bottle.
F. such as Fig. 9, compared with the measured value recorded with step d gas source and flow amounts meter, when the measured value of gas source and flow amount meter note reaches
During to predetermined aerating amount, liquid feeding control valve, the measured value opened return-air control valve, record liquid phase flowmeter are closed；Reversal valve
Valve position is set as：The positive interface (+) of reversal valve is made to be connected with compression output interface (U), contradirectional interface (-) connects with compression input
Mouth (I) connection；Two-way low temperature compression device makes liquefied natural gas be flowed into from B interface, is pressurized from the output of A interfaces；Liquefaction is natural
BOG in gas storage tank flows into natural gas aerating machine from gas phase interface, two-way low temperature compression device is entered by B interface, is pressurized from A
Interface output, cooled via return air flowmeter, the connection liquid feeding rifle interface equipped with check-valves and return-air flowmeter pipeline, pass through natural gas
The liquid feeding rifle interface of filling machine is flowed back into liquefied natural gas bottle；This step realizes that return-air operates, and in this step, flows through return-air
The flow direction of BOG of the flow direction of the BOG of flowmeter with flowing through return-air flowmeter in step c is opposite.
G. when liquefied natural gas bottle pressure reaches the pressure limit of setting, two-way low temperature compression device is closed, is disconnected
The connection of the filling opening of liquid feeding rifle and liquefied natural gas bottle disconnects the company of the gas returning port of return-air rifle and liquefied natural gas bottle
It connects, fueling process terminates；The measured value of return-air flowmeter is recorded, compared with the measured value of the return-air flowmeter of step b records,
Obtain being added into the actual quantity of the BOG of liquefied natural gas bottle by return-air flowmeter, the liquid phase flowmeter that step f is recorded
The liquid phase flowmeter measurements that measured value is recorded with step d subtract each other, and obtain being added into liquefied natural gas gas by liquid phase flowmeter
The actual quantity of the liquefied natural gas of bottle.In the present embodiment, the pressure limit of the liquefied natural gas bottle setting is 0.9MPa
~1.0MPa, the pressure measurement dress equipped with liquefied natural gas bottle on liquefied natural gas filling station or liquefied natural gas aerating machine
It puts.
During return-air, aerating hose, air filling gun are purged, therefore before aerating and when aerating is completed, hose
In without LNG liquid, do not need to rifle be pre-chilled in order to improve metering accuracy as other current filling machines and (fill
Hose liquid), improve processing safety and metering accuracy.
The BOG of LNG gas cylinders on automobile passes through return-air rifle, flows to inside filling machine, by the return-air flowmeter of filling machine
The BOG of reflux is measured, then enters compressor after cold-exchange recycles cold energy, is entered after overcompression, after cooling
LNG storage tank.The inlet and outlet of compressor are connected with one end of the two of cool exchanger runners, the other end of two runner of cool exchanger
Respectively as the inlet and outlet of liquefied natural gas or BOG.
The present invention does not use LNG pump and bulky pump pond, and the LNG in storage tank is after metering directly to liquefied natural gas gas
Bottle (such as the liquefied natural gas bottle being mounted on automobile) aerating.Principle is using in LNG gas cylinders on compressor extraction automobile
BOG makes the pressure in gas cylinder be less than the pressure of gas station LNG storage tank, under the action of pressure differential, the LNG liquid stream in storage tank
Enter in the LNG gas cylinders on automobile, to complete LNG liquid filled function, the BOG to release is first delivered to the LNG storages of gas station
It is temporarily stored in tank.After LNG liquid filling is completed, then the BOG extracted in storage tank is added in gas cylinder.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (6)
1. the pre-cooler of low temperature ultra-large type LNG tank, it is characterised in that：By the liquefaction in LNG tank
Natural gas is added in liquefied natural gas bottle, and including two-way low temperature compression device, flowmeter, the liquefied natural gas aerating machine is set
There are the liquid phase interface being connect with the liquid outlet of LNG tank, the gas phase being connect with the gas phase mouth of LNG tank to connect
Mouth, the return-air rifle interface being connect with return-air rifle, the liquid feeding rifle interface being connect with liquid feeding rifle, the two-way low temperature compression device are equipped with
Two interfaces：A interfaces, B interface, two-way low temperature compression device make BOG export or make from B interface from the inflow of A interfaces is pressurized
BOG is exported from B interface inflow is pressurized from A interfaces, and the flowmeter includes gas source and flow amount meter, return-air flowmeter, the return-air
Flowmeter is provided with the type double flow meter of gas cylinder connecting pin and low temperature compression connecting pin, and the air source liquid phase interface is connected by pipeline
The entrance of the gas source and flow amount meter is connect, the outlet of gas source and flow amount meter adds by the way that the pipeline connection for being equipped with a liquid feeding control valve is described
Liquid rifle interface, the outlet of gas source and flow amount meter also connect the two-way low temperature compression dress by being equipped with the pipeline of a pre- subcooling control valve
The A interfaces put, liquid feeding rifle interface also connect the gas cylinder connecting pin of the return-air flowmeter by pipeline, in the connection liquid feeding rifle
The pipeline of interface and return-air flowmeter is equipped with return-air control valve, and the return-air rifle interface connects back to air-flow gauge also by pipeline
Gas cylinder connecting pin, on the pipeline for connecting back to air gun interface and return-air flowmeter be equipped with make medium from return-air rifle interface stream
To the check-valves of return-air flowmeter, the low temperature compression connecting pin of the return-air flowmeter connects two-way low temperature compression also by pipeline
The A interfaces of device, the B interface of the two-way low temperature compression device connect the gas phase interface, the two-way low temperature by pipeline
Compression set includes compressor, cool exchanger, reversal valve；The cool exchanger be equipped with C interface, D interface, E interface, F interface, one
The cold exchange media in road flows through cool exchanger by the C interface and D interface, and the cold exchange media of another way passes through the E interface and F
Interface flows through cool exchanger, and the C interface of the cool exchanger connects the A interfaces of the two-way low temperature compression device, the cold friendship
The E interface of parallel operation connects the B interface of the two-way low temperature compression device；The reversal valve includes positive interface, contradirectional interface, pressure
Contracting input interface, compression output interface, the forward direction that the D interface and F interface of the cool exchanger connect the reversal valve respectively connect
Mouth and contradirectional interface, the compression input interface of the reversal valve connect the input port of the compressor, the compression output of reversal valve
The delivery outlet of interface connect compressor.
2. the pre-cooler of low temperature ultra-large type LNG tank according to claim 1, it is characterised in that：Cold exchange
Device is tubular type cool exchanger or shell-and-tube cool exchanger or one kind of board-like cool exchanger or plate-fin cool exchanger.
3. the pre-cooler of low temperature ultra-large type LNG tank according to claim 1, it is characterised in that：It is described cold
Exchanger is composed of tubular type cool exchanger or shell-and-tube cool exchanger or board-like cool exchanger or plate-fin cool exchanger
Cool exchanger.
4. the pre-cooler of low temperature ultra-large type LNG tank according to claim 1, it is characterised in that：It is described to change
It is two position four-way valves to valve, a valve position of reversal valve makes the positive interface of reversal valve be connected with compression input interface, is anti-
It is connected to interface with compression output interface；Another valve position of reversal valve connects the positive interface of reversal valve and compression output interface
Logical, contradirectional interface is connected with compression input interface.
5. the pre-cooler of low temperature ultra-large type LNG tank according to claim 1, it is characterised in that：It is described to change
It is to be combined to form by two triple valves to valve, the D interface connection of the interface connection cool exchanger of first triple valve, first
The input port of other two interface difference connect compressor of a triple valve and delivery outlet；One interface of second triple valve connects
Connect the F interface connection of cool exchanger, other two interface of second triple valve also distinguishes the input port of connect compressor and defeated
Outlet.
6. the pre-cooler of low temperature ultra-large type LNG tank according to claim 1, it is characterised in that：The gas
Source stream gauge and return-air flowmeter are the flowmeters of the flow that can measure liquefied natural gas, density and temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405208.1A CN108150825A (en) | 2017-12-22 | 2017-12-22 | The pre-cooler of low temperature ultra-large type LNG tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711405208.1A CN108150825A (en) | 2017-12-22 | 2017-12-22 | The pre-cooler of low temperature ultra-large type LNG tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108150825A true CN108150825A (en) | 2018-06-12 |
Family
ID=62465137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711405208.1A Pending CN108150825A (en) | 2017-12-22 | 2017-12-22 | The pre-cooler of low temperature ultra-large type LNG tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108150825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556984A (en) * | 2018-12-07 | 2019-04-02 | 合肥通用机械研究院有限公司 | Fast aeration chilldown system and its application method |
| CN112789444A (en) * | 2018-10-09 | 2021-05-11 | 乔治洛德方法研究和开发液化空气有限公司 | Method and installation for storing and distributing liquefied hydrogen |
-
2017
- 2017-12-22 CN CN201711405208.1A patent/CN108150825A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112789444A (en) * | 2018-10-09 | 2021-05-11 | 乔治洛德方法研究和开发液化空气有限公司 | Method and installation for storing and distributing liquefied hydrogen |
| CN112789444B (en) * | 2018-10-09 | 2023-01-10 | 乔治洛德方法研究和开发液化空气有限公司 | Method and installation for storing and distributing liquefied hydrogen |
| CN109556984A (en) * | 2018-12-07 | 2019-04-02 | 合肥通用机械研究院有限公司 | Fast aeration chilldown system and its application method |
| CN109556984B (en) * | 2018-12-07 | 2021-08-31 | 合肥通用机械研究院有限公司 | Rapid inflation precooling system and use method thereof |
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Application publication date: 20180612 |