CN107883180A - Liquefied natural gas filling system - Google Patents

Liquefied natural gas filling system Download PDF

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Publication number
CN107883180A
CN107883180A CN201711000411.0A CN201711000411A CN107883180A CN 107883180 A CN107883180 A CN 107883180A CN 201711000411 A CN201711000411 A CN 201711000411A CN 107883180 A CN107883180 A CN 107883180A
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CN
China
Prior art keywords
stop valve
filling
natural gas
charging line
liquefied natural
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201711000411.0A
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Chinese (zh)
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CN107883180B (en
Inventor
陈长建
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Enn New Energy Technology Co Ltd
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Shanghai Enn New Energy Technology Co Ltd
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Priority to CN201711000411.0A priority Critical patent/CN107883180B/en
Publication of CN107883180A publication Critical patent/CN107883180A/en
Application granted granted Critical
Publication of CN107883180B publication Critical patent/CN107883180B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C5/00Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/04Arrangement or mounting of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2227/00Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04Methods for emptying or filling
    • F17C2227/046Methods for emptying or filling by even emptying or filling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2270/00Applications
    • F17C2270/01Applications for fluid transport or storage
    • F17C2270/0102Applications for fluid transport or storage on or in the water

Abstract

The invention discloses a kind of liquefied natural gas filling system, including:Charging line, the port at the charging line both ends are respectively to be used to connect by the first port of filling storage tank and the second port for connecting filling storage tank;The filling stop valve being arranged in the charging line;What is be connected with the charging line diffuses pipeline, and the junction for diffusing pipeline and the charging line is between the filling stop valve and the second port;It is arranged on the bleeding stop valve diffused in pipeline.The liquefied natural gas filling system of the present invention, compared with prior art, solve the big caused technical problem poor and big for environment pollution using liquefied natural gas economy of long amount of diffusin of existing charging line filling time.

Description

Liquefied natural gas filling system
Technical field
The present invention relates to liquefied natural gas filling field, more particularly to a kind of liquefied natural gas filling system.
Background technology
Liquefied natural gas is increasingly favored, many countries will liquefaction as a kind of cleaning, the efficient energy by people Natural gas is classified as preferred fuels.Liquefied natural gas is also widely used in field of transport energy, liquefied natural gas conduct The application technology of motor vehicle fuel is more ripe, and liquefied natural gas had also obtained a certain degree of as ship power fuel in recent years Development.Because liquefied natural gas is as current still at an early stage of development, the charging line system of liquefied natural gas of ship power fuel The influence of system and charging method to economy and the feature of environmental protection seems extremely important.
Tank car LNG tank is to ship LNG tank loading technique major technique in present practical application Feature, it is exactly that tank car LNG tank and charging line system share the gas phase of a ship LNG tank and diffused Valve.Because ship LNG tank volume is general all bigger, charging line system is long and heat insulation effect is poor, so plus The amount of natural gas diffused needed for note pipe-line system unit decompression is bigger, and it is long to diffuse the time, in addition, the smaller liquid of pressure differential Flow velocity in pipeline is slower, and amount of vaporization is larger, this adds increased the amount of diffusin of natural gas, while extends the filling time, both The economy using liquefied natural gas is reduced, also increases the degree of environmental pollution.
Present filling process:It is exactly to utilize between tank car LNG tank and ship LNG tank Pressure differential realize.And realize that the method for pressure differential is exactly to be pressurized to tank car LNG tank or natural to ship liquefaction Gas storage tank is depressured.By the maximum pressure that tank car LNG tank is born is relatively low, typically only 7.5kg/cm2.And send out The supply gas pressure of motivation will be in 6kg/cm2Left and right, ship LNG tank pressure should be slightly bigger than this pressure.In actual filling The pressure differential of tank car LNG tank and ship LNG tank may very little, and liquefied natural gas heat can gas Changing generation vapour lock makes flow rate of liquid slack-off, filling speed is become very slow.So to realize that quick smoothly filling will add The pressure differential of big tank car LNG tank and ship LNG tank.The method taken is filled now mainly by groove Car LNG tank pressure boost is to 7kg/cm2Left and right, while open the gas phase diffusion valve of ship LNG tank Ship LNG tank and charging line system are reduced by diffusing the gas phase natural gas in ship LNG tank The pressure of system.Filling of the tank car LNG tank to ship LNG tank is realized by pressure differential, works as pressure differential Stop aerating when reaching balance.This charging line system and charging method not only reduce the economy that ship uses natural gas Property, and also increase the degree of environmental pollution.Not only there is above mentioned problem in the filling of liquefied natural gas, other liquefied natural gas There is also above mentioned problem.
The content of the invention
The invention provides a kind of liquefied natural gas filling system, compared with prior art, solves existing filler pipe The poor and big for environment pollution technical problem of liquefied natural gas economy is used caused by road filling time long amount of diffusin is big.
To reach above-mentioned purpose, the present invention provides following technical scheme:
A kind of liquefied natural gas filling system, including:
Charging line, the port at the charging line both ends are respectively to be used to connect by the first port and use of filling storage tank In the second port of connection filling storage tank;
The filling stop valve being arranged in the charging line;
What is be connected with the charging line diffuses pipeline, and the junction position for diffusing pipeline and the charging line Between the filling stop valve and the second port;
It is arranged on the bleeding stop valve diffused in pipeline.
As a kind of optional mode, the filling stop valve uses pneumatic stopping valve;
The loading system also includes the pneumatic stopping valve control cabinet being connected with the filling stop valve, the pneumatic cut-off Valve control cabinet is used for the opening and closing for controlling the filling stop valve.
As a kind of optional mode, the bleeding stop valve uses pneumatic stopping valve;
The bleeding stop valve is connected with the pneumatic stopping valve control cabinet, and the pneumatic stopping valve control cabinet is additionally operable to control Make the opening and closing of the pneumatic stopping valve.
As a kind of optional mode, the pneumatic stopping valve control cabinet is used to control the bleeding stop valve and filling to cut Only valve Close All, and one of opening of the control bleeding stop valve and filling stop valve.
As a kind of optional mode, the second port is provided with the method for being connected with filling with the interface of storage tank It is blue.
As a kind of optional mode, in addition to the Safety relief valve in parallel with the bleeding stop valve, the safety is put Valve is dissipated to be used to, when the pressure diffused in pipeline exceeds preset value, diffuse the gas diffused in pipeline.
As a kind of optional mode, in addition to it is arranged on described diffuse in pipeline and is put with what the bleeding stop valve was connected Separate tube road stop valve, and the pipeline stop valve that diffuses is arranged on bleeding stop valve and described diffuses pipeline and the charging line Junction between.
As a kind of optional mode, the pipeline stop valve that diffuses uses hand stop valve.
As a kind of optional mode, in addition to it is arranged in the charging line and adds with what the filling stop valve was connected Pipeline stop valve is noted, and the charging line stop valve is arranged on the second port and described diffuses pipeline and the filler pipe Between the junction on road, the pipeline stop valve that diffuses is hand stop valve.
As a kind of optional mode, the charging line is additionally provided with pressure gauge, and the pressure gauge is used to measure institute State the gas pressure between filling stop valve and charging line stop valve described in charging line.
The liquefied natural gas filling system of the embodiment of the present invention includes charging line, the port point at the charging line both ends Wei not be for connecting by the first port of filling storage tank and the second port for connecting filling storage tank;It is arranged on the filling Filling stop valve in pipeline;What is be connected with the charging line diffuses pipeline, and described diffuses pipeline and the filler pipe The junction on road is between the filling stop valve and the second port;It is arranged on described diffuse in pipeline and diffuses cut-off Valve.The liquefied natural gas filling system of the embodiment of the present invention is less than suitable for filling with the fluid temperature of the liquefied natural gas of storage tank By the fluid temperature of the liquefied natural gas of filling storage tank, and the pressure of the liquefied natural gas of filling storage tank is higher than by filling storage tank Liquefied natural gas pressure situation.When filling liquefied natural gas using the liquefied natural gas filling system of the present embodiment, bag Include following steps:First, the first port of charging line is connected with by filling storage tank, second port and filling storage tank phase Connection;Then, filling stop valve is closed, bleeding stop valve is opened, and now, the gas in charging line is diffused to the external world;It Afterwards, bleeding stop valve is closed, control filling fills liquefied natural gas into charging line with storage tank, and liquefied natural gas fills rapidly Full charging line, the gas pressure in charging line increase to identical with the gas pressure in filling storage tank;Followed by, open Fill stop valve, the liquefied natural gas of high pressure low temperature is filled into by filling storage tank by charging line, now by filling storage tank In the storage gas that has gasified run into the liquefied natural gas of low temperature and liquefied again so that being had by the pressure of filling storage tank Decrease to some degree so that filling is more quick and smooth;Finally, the storage gas to have been gasified in filling storage tank is again Secondary liquefied process stops, and with the progress of filling liquefied natural gas, is gradually risen by the pressure of filling storage tank, is stored up when by filling When gas pressure in tank is equal to the gas pressure in filling storage tank, filling stops.The liquefied natural gas of the embodiment of the present invention Filling stop valve in loading system, diffuses pipeline and bleeding stop valve forms the bleeding device of charging line.With background skill Prior art in art is compared, and the liquefied natural gas filling system of the embodiment of the present invention is set for charging line individually diffuses dress Put, charging line can individually be diffused, because charging line volume is smaller, so needed for the decompression of charging line unit The amount of natural gas diffused is smaller, and the time is shorter, in addition, flow velocity of the larger liquid of pressure differential in charging line is very fast, gas Change amount is smaller, and the filling time is short, not only increases the economy using liquefied natural gas, and reduce the journey of environmental pollution Degree.
Brief description of the drawings
Fig. 1 is the liquefied natural gas filling system schematic of one embodiment of the present of invention.
Main element description of reference numerals:
110 filling stop valves, 120 charging line stop valves, 130 flanges, 140 pressure gauges,
210 bleeding stop valves, 220 Safety relief valves, 230 diffuse pipeline stop valve,
240 pneumatic stopping valve control cabinets.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
The liquefied natural gas filling system of one embodiment of the present of invention, as shown in figure 1, including:
Charging line, the port at the charging line both ends are respectively to be used to connect by the first port and use of filling storage tank In the second port of connection filling storage tank;
The filling stop valve 110 being arranged in the charging line;
What is be connected with the charging line diffuses pipeline, and the junction position for diffusing pipeline and the charging line Between the filling stop valve 110 and the second port;
It is arranged on the bleeding stop valve 210 diffused in pipeline.
The liquefied natural gas filling system of the embodiment of the present invention includes charging line, the port point at the charging line both ends Wei not be for connecting by the first port of filling storage tank and the second port for connecting filling storage tank;It is arranged on the filling Filling stop valve 110 in pipeline;What is be connected with the charging line diffuses pipeline, and described diffuses pipeline and the filling The junction of pipeline is between the filling stop valve 110 and the second port;Putting in pipeline is diffused described in being arranged on Dissipate stop valve 210.The liquefied natural gas filling system of the embodiment of the present invention is applied to the liquid of the liquefied natural gas of filling storage tank Temperature is less than by the fluid temperature of the liquefied natural gas of filling storage tank, and filling is higher than with the pressure of the liquefied natural gas of storage tank By the situation of the pressure of the liquefied natural gas of filling storage tank.Use the liquefied natural gas filling system filling liquefaction day of the present embodiment During right gas, comprise the following steps:
First, the first port of charging line is connected with by filling storage tank, second port is connected with filling with storage tank It is logical;
Then, filling stop valve 110 is closed, bleeding stop valve 210 is opened, and now, the gas in charging line diffuses To the external world;
Afterwards, bleeding stop valve 210 is closed, control filling fills liquefied natural gas, liquid into charging line with storage tank Change natural gas and quickly fill with charging line, the gas pressure in charging line increases to and the gas pressure phase in filling storage tank Together;
Followed by, filling stop valve 110 is opened, the liquefied natural gas of high pressure low temperature is filled into by charging line to be filled In storage tank, the liquefied natural gas that low temperature is now run into by the storage gas to have gasified in filling storage tank is liquefied again, so as to So that decrease to some degree is had by the pressure of filling storage tank so that filling is more quick and smooth;
Finally, liquefied process stops the storage gas to have been gasified in filling storage tank again, with filling liquefaction day The progress of right gas, is gradually risen by the pressure of filling storage tank, and the gas pressure in by filling storage tank is equal in filling storage tank Gas pressure when, filling stop.
Filling stop valve 110 in the liquefied natural gas filling system of the embodiment of the present invention, diffuse pipeline and diffuse cut-off Valve 210 forms the bleeding device of charging line.Compared with the prior art in background technology, the liquefaction day of the embodiment of the present invention Right gas loading system is that charging line sets single bleeding device, charging line individually can be diffused, due to filling Pipe volume is smaller, so the amount of natural gas diffused needed for the decompression of charging line unit is smaller, the time is shorter, in addition, Flow velocity of the larger liquid of pressure differential in charging line is very fast, and amount of vaporization is smaller, and the filling time is short, not only increases using liquefaction The economy of natural gas, and reduce the degree of environmental pollution.
On filling the selection of stop valve 110, pneumatic stopping valve can be used;
As shown in figure 1, the loading system also includes the pneumatic stopping valve control cabinet being connected with the filling stop valve 110 240, the pneumatic stopping valve control cabinet 240 is used for the opening and closing for controlling the filling stop valve 110.
By filling the cooperation of stop valve 110 and pneumatic stopping valve control cabinet 240, it can very easily realize and filling is cut The only opening and closing of valve 110.
On the selection of bleeding stop valve 210, pneumatic stopping valve can be used;
As shown in figure 1, the bleeding stop valve 210 is connected with the pneumatic stopping valve control cabinet 240, the pneumatic cut-off Valve control cabinet 240 is additionally operable to control the opening and closing of the pneumatic stopping valve.
By the cooperation of bleeding stop valve 210 and pneumatic stopping valve control cabinet 240, it can very easily realize and be cut to diffusing The only opening and closing of valve 210.
Bleeding stop valve 210 and filling stop valve 110 can be controlled by pneumatic stopping valve control cabinet 240.Tool Body is:
The pneumatic stopping valve control cabinet 240 is used to control the bleeding stop valve 210 and filling stop valve 110 all to close Close, and one of opening of the control bleeding stop valve 210 and filling stop valve 110.
Control of the above-mentioned pneumatic stopping valve control cabinet 240 to bleeding stop valve 210 and filling stop valve 110, can be prevented Filled in the case where bleeding stop valve 210 and filling stop valve 110 are fully open, avoid liquefied natural gas filling system The leakage of the liquefied natural gas of system, serve the effect of safeguard protection so that liquefied natural gas filling system is more safe and reliable.
Specifically, in order to realize and fill the connection with storage tank, as shown in figure 1, the filling of liquefied natural gas filling system The second port of pipeline is provided with the flange 130 for being connected with filling with the interface of storage tank.
It can realize that liquefied natural gas filling system is connected with filling with the interface of storage tank by flange 130.
In order to further improve the security of liquefied natural gas filling system, as shown in figure 1, liquefied natural gas filling system Also include the Safety relief valve 220 in parallel with the bleeding stop valve 210, the Safety relief valve 220 is used to diffuse described When pressure in pipeline exceeds preset value, the gas diffused in pipeline is diffused.
So, air-tight state is in liquefied natural gas filling system, and carry out filling to cause liquefied natural gas filling During the gas pressure rise of system, Safety relief valve 220 is put when the pressure diffused in pipeline exceeds preset value to described Gas in separate tube road is diffused, and avoids the potential safety hazard caused by the gas pressure rise of liquefied natural gas filling system.
In order to further improve the security of liquefied natural gas filling system, as shown in figure 1, liquefied natural gas filling system Also include being arranged on described diffuse in pipeline and diffuse pipeline stop valve 230 with what the bleeding stop valve 210 was connected, and described put Separate tube road stop valve 230 is arranged between bleeding stop valve 210 and the junction for diffusing pipeline and the charging line.
Diffuse pipeline stop valve 230 and be in normally open, its effect set in pipeline is diffused in diffusing cut-off Valve 210 can not normal switching-off when, diffuse pipeline stop valve 230 and close, diffuse pipeline so as to close, no longer diffused.
On diffusing the selection of pipeline stop valve 230, hand stop valve can be used.Hand stop valve stability is high, energy When needing closing to diffuse pipeline, operating personnel, which manually close, diffuses pipeline stop valve 230, diffuses pipeline and is no longer put Dissipate.
In order to further improve the security of liquefied natural gas filling system, as shown in figure 1, liquefied natural gas filling system Also include being arranged in the charging line with the charging line stop valve 120 connect of filling stop valve 110, and described add Note pipeline stop valve 120 is arranged between the second port and the junction for diffusing pipeline and the charging line.
Charging line stop valve 120 is in normally open, and its effect set is in the filling cut-off in charging line Valve 110 can not normal switching-off when, charging line stop valve 120 is closed, and so as to close charging line, is no longer filled.
On the selection of charging line stop valve 120, hand stop valve can be used.Hand stop valve stability is high, energy When needing to close charging line, operating personnel manually close charging line stop valve 120, and no longer charging line is carried out Filling.
Gas pressure in charging line, it can influence to fill.Therefore, it is necessary to be carried out to the pressure of the gas in charging line Monitoring.Therefore, as shown in figure 1, the charging line of liquefied natural gas filling system is additionally provided with pressure gauge 140, and it is described Pressure gauge 140 is used to measure the gas filled described in the charging line between stop valve 110 and charging line stop valve 120 Pressure.
The liquefied natural gas filling system of the present invention is less than suitable for the temperature of the liquefied natural gas of filling storage tank and added The temperature of the liquefied natural gas of storage tank is noted, and the pressure of the liquefied natural gas of filling storage tank is higher than by the liquefaction day of filling storage tank The situation of the pressure of right gas.
The liquefied natural gas filling system of the present invention is ship LNG tank by tank car LNG tank Filled, the requirement of the liquefied natural gas to newly filling is:The liquid of liquefied natural gas in tank car LNG tank Temperature is preferably selected tank car LNG tank less than the fluid temperature of the liquefied natural gas in ship LNG tank It is inside subzero 162 DEG C of liquefied natural gas.Filling is carried out using the liquefied natural gas filling system of the present invention to comprise the following steps:
The first step:It is connected by flange 130 with the interface of tank car LNG tank;
Second step:Holding diffuses pipeline stop valve 230 and is in normally open, closes bleeding stop valve 210;Filling is closed to cut Only valve 110, charging line stop valve 120 is opened, now, if between the interface of flange 130 and tank car LNG tank There is gas leakage, then can be detected by gas leakage detection device;In the case of no gas leakage, the 3rd step is carried out;
3rd step:Bleeding stop valve 210 is opened, the gases at high pressure in charging line diffuse by diffusing pipeline, work as filling When gas pressure in pipeline is reduced to slightly above atmospheric pressure, bleeding stop valve 210 is closed;
4th step:The liquid valve of tank car LNG tank is opened, for liquefied natural gas filling system filling liquefaction day Right gas, now, more, the liquefaction of low temperature higher than the gas pressure of charging line of gas pressure in tank car LNG tank Natural gas is full of charging line quickly, and the gas pressure of charging line is increased to the gas with tank car LNG tank simultaneously Pressure is identical;
5th step:Open and fill stop valve 110, the liquefied natural gas of the high pressure low temperature in tank car LNG tank leads to Cross charging line to rapidly enter in ship LNG tank, now the gaseous natural gas in ship LNG tank is met Liquefied natural gas to the low temperature of entrance can liquefy again, so that the gaseous natural gas in ship LNG tank has A certain degree of reduction so that filling is more smooth and quick;
6th step:With the increase of the liquefied natural gas in ship LNG tank, gaseous natural gas is re-liquefied Process stop, the gas pressure of ship LNG tank starts to gradually rise, when the gas of ship LNG tank The gas pressure of body pressure and tank car LNG tank closes filling stop valve 110 when reaching balance, stop filling;If Need to continue to fill, then need the gas phase diffusion valve for opening ship LNG tank to reduce ship LNG tank Gas pressure, until the gas pressure of ship LNG tank no longer reduces, close the gas of ship LNG tank Phase diffusion valve;The filling of liquefied natural gas filling system is continuing with, when the gas pressure and tank car of ship LNG tank The pressure of LNG tank closes filling stop valve 110 when reaching balance, stop filling, closes the storage of tank car liquefied natural gas The liquid valve of tank;
7th step:Liquefied natural gas in liquefied natural gas filling system is blown into ship LNG tank with nitrogen It is interior, after clean with nitrogen purging in the natural gas in confirming liquefied natural gas filling system, flange 130 and tank car are liquefied The interface separation of natural gas storage tank.
Obviously, those skilled in the art can carry out various changes and modification without departing from this hair to the embodiment of the present invention Bright spirit and scope.So, if these modifications and variations of the present invention belong to the claims in the present invention and its equivalent technologies Within the scope of, then the present invention is also intended to comprising including these changes and modification.

Claims (10)

  1. A kind of 1. liquefied natural gas filling system, it is characterised in that including:
    Charging line, the port at the charging line both ends are respectively to be used to connect by the first port of filling storage tank and for even The second port of logical filling storage tank;
    The filling stop valve being arranged in the charging line;
    What is be connected with the charging line diffuses pipeline, and described diffuses pipeline and the junction of the charging line is located at institute State between filling stop valve and the second port;
    It is arranged on the bleeding stop valve diffused in pipeline.
  2. 2. liquefied natural gas filling system according to claim 1, it is characterised in that the filling stop valve is using pneumatic Stop valve;
    The loading system also includes the pneumatic stopping valve control cabinet being connected with the filling stop valve, the pneumatic stopping valve control Case processed is used for the opening and closing for controlling the filling stop valve.
  3. 3. liquefied natural gas filling system according to claim 2, it is characterised in that the bleeding stop valve is using pneumatic Stop valve;
    The bleeding stop valve is connected with the pneumatic stopping valve control cabinet, and the pneumatic stopping valve control cabinet is additionally operable to control institute State the opening and closing of pneumatic stopping valve.
  4. 4. liquefied natural gas filling system according to claim 3, it is characterised in that the pneumatic stopping valve control cabinet is used In the control bleeding stop valve and filling stop valve Close All, and control the bleeding stop valve and fill stop valve It is one of to open.
  5. 5. liquefied natural gas filling system according to claim 1, it is characterised in that the second port, which is provided with, to be used for The flange being connected with filling with the interface of storage tank.
  6. 6. liquefied natural gas filling system according to any one of claims 1 to 5, it is characterised in that also include putting with described Dissipate stop valve Safety relief valve in parallel, the Safety relief valve is used to exceed preset value in the pressure diffused in pipeline When, the gas diffused in pipeline is diffused.
  7. 7. liquefied natural gas filling system according to claim 6, it is characterised in that also include being arranged on the exhaust stack What bleeding stop valve described in Lu Zhongyu was connected diffuses pipeline stop valve, and the pipeline stop valve that diffuses is arranged on bleeding stop valve And between the junction for diffusing pipeline and the charging line.
  8. 8. liquefied natural gas filling system according to claim 7, it is characterised in that described to diffuse the use of pipeline stop valve Hand stop valve.
  9. 9. liquefied natural gas filling system according to any one of claims 1 to 5, it is characterised in that also include being arranged on institute The charging line stop valve connected in charging line with the filling stop valve is stated, and the charging line stop valve is arranged on institute State between second port and the junction for diffusing pipeline and the charging line, the pipeline stop valve that diffuses is to cut manually Only valve.
  10. 10. liquefied natural gas filling system according to claim 9, it is characterised in that the charging line is additionally provided with Pressure gauge, and the pressure gauge is used to measure described in the charging line between filling stop valve and charging line stop valve Gas pressure.
CN201711000411.0A 2017-10-24 2017-10-24 Liquefied natural gas filling system Active CN107883180B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN107883180A true CN107883180A (en) 2018-04-06
CN107883180B CN107883180B (en) 2020-05-08

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Citations (5)

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