CN110081308B - LNG device of unloading convenient to take - Google Patents

LNG device of unloading convenient to take Download PDF

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Publication number
CN110081308B
CN110081308B CN201910462043.4A CN201910462043A CN110081308B CN 110081308 B CN110081308 B CN 110081308B CN 201910462043 A CN201910462043 A CN 201910462043A CN 110081308 B CN110081308 B CN 110081308B
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CN
China
Prior art keywords
lng
valve
immersed pump
liquid
lng low
Prior art date
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Application number
CN201910462043.4A
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Chinese (zh)
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CN110081308A (en
Inventor
吴志锐
李波
熊英
祁志曌
吴卓君
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Tianjin Jinyida New Energy Technology Development Co ltd
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Tianjin Jinyida New Energy Technology Development Co ltd
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Priority to CN201910462043.4A priority Critical patent/CN110081308B/en
Publication of CN110081308A publication Critical patent/CN110081308A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—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
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2227/0135—Pumps
    • 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
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0626—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • 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
    • F17C2270/05—Applications for industrial use

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 an LNG unloading device convenient to take, which comprises an LNG transport vehicle, an LNG low-temperature loading tank, a immersed pump, an LNG low-temperature storage tank, an induction type liquid level meter, an output exhaust valve, a safety valve, a filter valve, a heat exchanger and an output drain valve, wherein the LNG low-temperature loading tank is arranged on one side of the LNG transport vehicle, a natural gas outlet valve is arranged at the top of the tail end of the LNG low-temperature loading tank, a gas pipe is connected to the natural gas outlet valve, and an LNG liquid outlet valve is arranged at the bottom of the tail end of the LNG low-temperature loading tank below the natural gas outlet valve, and the LNG unloading device has the beneficial effects that: according to the invention, the LNG can be prevented from being heated and expanded in the unloading process, so that the pressure in the LNG low-temperature storage tank is too high to cause danger, the LNG liquid level and the capacity of the LNG in the LNG low-temperature storage tank can be observed and monitored through the induction type liquid level meter after the unloading is finished, and meanwhile, the output exhaust valve and the output drain valve are arranged, so that the natural gas and the LNG in the LNG low-temperature storage tank are more convenient to distribute and take.

Description

LNG device of unloading convenient to take
Technical Field
The invention relates to the technical field of LNG unloading structures, in particular to an LNG unloading device convenient to take.
Background
The traditional LNG is difficult to prevent LNG and is unloaded the in-process thermal expansion of unloading, leads to LNG low temperature holding vessel internal pressure too big and take place danger, also can't observe and monitor LNG low temperature holding vessel inside LNG liquid level height and capacity after unloading is accomplished, uses inconveniently, and inconvenient distribution of later stage takes simultaneously.
Disclosure of Invention
The invention aims to provide an LNG unloading device convenient to take and solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an LNG unloading device convenient to take, includes LNG transport vechicle, LNG low temperature loading jar, immersed pump, LNG low temperature holding vessel, inductive liquid level meter, export discharge valve, relief valve, filter valve, heat exchanger and export fluid-discharge valve, LNG low temperature loading jar is installed to LNG transport vechicle one side, the terminal top of LNG low temperature loading jar is installed the natural gas valve of giving vent to anger, be connected with the gas-supply pipe on the natural gas valve of giving vent to anger, the LNG liquid valve is connected with the transfer line in the LNG liquid valve, the transfer line end is equipped with the immersed pump, immersed pump inlet is installed to immersed pump one side bottom, immersed pump opposite side top is installed the immersed pump export, the immersed pump export is connected with the liquid pump through the immersed pump inlet, LNG low temperature holding vessel front end outside is fixed in the installation mesa through the front fixed plate, LNG low temperature holding vessel back end outside is fixed in the installation mesa through the back fixed plate, the inductive liquid level valve below the LNG low temperature loading jar is installed to LNG low temperature bottom the terminal bottom, the inductive liquid level meter is connected with the LNG liquid pump through the immersed pump between the LNG low temperature holding vessel and the top, the LNG low temperature holding vessel is connected with the LNG low temperature liquid pump through the inductive liquid level meter, the LNG low temperature holding vessel is connected with the LNG liquid pump top is connected with the LNG low temperature holding vessel through the top, the LNG low temperature liquid pump is connected with the LNG liquid pump top is connected with the LNG low temperature holding vessel through the LNG low temperature liquid inlet, the utility model discloses a liquid pump, including the low temperature storage tank of LNG, be located export discharge valve one side on the air duct and connect the relief valve, be connected the synthetic pipe on the air duct between air duct and the low temperature storage tank of LNG, install the air-vent valve on the synthetic pipe, synthetic pipe bottom connection catheter fixed sleeve and catheter, catheter fixed sleeve installs on the LNG low temperature storage tank, the export drain valve is installed on the catheter top, install the filter valve on the catheter between catheter and the export drain valve, install the liquid valve on the catheter of filter valve one side, the catheter outside installation heat exchanger between liquid valve and the export drain valve, the catheter passes the heat exchanger and is connected with the export drain valve.
Preferably, the natural gas outlet valve and the natural gas inlet valve are stainless steel gas check valves.
Preferably, a immersed pump fixing base is installed at the bottom of the immersed pump, and the immersed pump is fixed on the installation table top through the immersed pump fixing base.
Preferably, a cryopump cabin is arranged inside the immersed pump.
Preferably, an exhaust pipe pressure gauge is mounted on the output exhaust valve.
Preferably, a drain pressure gauge is mounted on the output drain valve.
Preferably, the LNG liquid outlet valve and the LNG liquid inlet valve are all RD high-pressure check valves.
Preferably, the temperature inside the LNG cryogenic storage tank is-140±5 ℃.
Compared with the prior art, the invention has the beneficial effects that: after the LNG transport vechicle is berthed to LNG department of unloading, be connected to between natural gas valve and the natural gas inlet valve of giving vent to anger respectively with gas-supply pipe LNG low temperature holding vessel, and be connected LNG liquid outlet valve and immersed pump entry and immersed pump export and LNG feed liquor valve respectively through two LNG low temperature loading vessel immersed pump exports, open immersed pump and LNG liquid outlet valve and natural gas valve of giving vent to anger, the natural gas at the top in the LNG low temperature loading vessel is derived by the natural gas valve of giving vent to anger when in the time, and get into the LNG low temperature holding vessel through LNG low temperature loading vessel LNG low temperature holding vessel, and LNG that LNG low temperature loading vessel bottom was taken is derived by LNG liquid outlet valve, and get into the inside storage of LNG low temperature holding vessel after passing through the cryogenic pump cabin in the immersed pump, prevent LNG in unloading in-process heated expansion, lead to LNG low temperature holding vessel internal LNG liquid level and capacity, set up simultaneously and export the liquid outlet valve and make natural gas and LNG in the LNG low temperature holding vessel convenient more distribution in the LNG low temperature holding vessel after the unloading is accomplished.
Drawings
For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
Fig. 1 is an overall construction diagram of the present invention.
In the figure: 1. an LNG carrier; 2. an LNG cryogenic loading tank; 3. LNG goes out liquid valve; 4. a natural gas outlet valve; 5. a immersed pump; 6. an immersed pump outlet; 7. LNG feed liquor valve; 8. a natural gas inlet valve; 9. LNG cryogenic storage tanks; 10. a rear fixing plate; 11. an inductive level gauge; 12. an exhaust pipe pressure gauge; 13. outputting an exhaust valve; 14. an air duct; 15. a safety valve; 16. a pressure regulating valve; 17. a comprehensive pipe; 18. a catheter fixing sleeve; 19. a filter valve; 20. a liquid valve; 21. a catheter; 22. a heat exchanger; 23. outputting a liquid discharge valve; 24. a immersed pump fixing base; 25. an immersed pump inlet; 26. an infusion tube; 27. low Wen Bengcang; 28. a front fixing plate; 29. a gas pipe; 30. a drain pressure gauge.
Detailed Description
As shown in fig. 1, the present embodiment adopts the following technical scheme: the utility model provides an LNG unloading device convenient to take, includes LNG transport vechicle 1, LNG low temperature loading tank 2, immersed pump 5, LNG low temperature holding vessel 9, induction type liquid level meter 11, delivery vent valve 13, relief valve 15, filter valve 19, heat exchanger 22 and delivery drain valve 23, LNG low temperature loading tank 2 is installed to LNG transport vechicle 1 one side, LNG low temperature loading tank 2 end top installs natural gas valve 4, be connected with gas-supply pipe 29 on the natural gas valve 4, LNG low temperature loading tank 2 end bottom below the natural gas valve 4 installs LNG liquid outlet valve 3, be connected with transfer line 26 on the LNG liquid outlet valve 3, the transfer line 26 end is equipped with immersed pump 5, immersed pump 5 one side bottom is installed and is immersed pump entry 25, immersed pump 5 opposite side top is installed and is exported 6, immersed pump entry 25 and 5 are connected, one side is equipped with LNG low temperature holding vessel 9, the fixed plate outside in the low temperature holding vessel 9 anterior segment is through front end mounting plate 28 and is connected with gas-supply pipe 29, LNG low temperature holding vessel 2 is connected with LNG liquid level meter 7 through the fixed plate outside the LNG low temperature holding vessel 7 and the LNG low temperature liquid level meter 7 is installed to LNG low temperature holding vessel 9, LNG liquid level meter 7 is connected with LNG low temperature liquid level 9 top side through the fixed plate 7, LNG liquid inlet valve 7 is connected with LNG top side of the LNG low temperature holding vessel 9, LNG liquid level meter is connected with LNG top side through the induction type liquid level meter 7 through the fixed plate 7, the utility model discloses a LNG low temperature storage tank, including LNG low temperature storage tank 9, submerged pump export 6 and LNG feed liquor valve 7, through transfer line 26 connection between, the air duct 14 is connected at LNG low temperature storage tank 9 opposite side top, connect export discharge valve 13 on the air duct 14, be located export discharge valve 13 one side on the air duct 14 and connect relief valve 15, be connected on the air duct 14 between air duct 14 and the LNG low temperature storage tank 9 and synthesize pipe 17, install air-vent valve 16 on the synthesize pipe 17, synthesize pipe 17 bottom and connect catheter fixing sleeve 18 and catheter 21, catheter fixing sleeve 18 installs on LNG low temperature storage tank 9, output drain valve 23 is installed on the catheter 21 top, install filter valve 19 on catheter 21 and export drain valve 23, install liquid valve 20 on catheter 21 of filter valve 19 one side, the catheter 21 outside between liquid valve 20 and the output drain valve 23 installs heat exchanger 22, catheter 21 passes heat exchanger 22 and is connected with export drain valve 23, heat exchanger 22 is JT-MR03-01 model.
The natural gas outlet valve 4 and the natural gas inlet valve 8 are stainless steel gas one-way valves, so that natural gas at the inner top of the LNG low-temperature loading tank 2 can be conveniently led out.
The immersed pump 5 is fixed on the installation table surface through the immersed pump fixing base 24, and the immersed pump 5 is stable in structure.
Wherein, the immersed pump 5 is internally provided with a low Wen Bengcang for storing LNG.
Wherein, the output exhaust valve 13 is provided with an exhaust pipe pressure gauge 12, which is convenient for observing the pressure of the output exhaust valve 13.
Wherein, the output drain valve 23 is provided with a drain pipe pressure gauge 30, which is convenient for observing the pressure of the output drain valve 23.
The LNG liquid outlet valve 3 and the LNG liquid inlet valve 7 are all RD high-pressure one-way valves, so that the LNG storage tank is good in air tightness, firm and durable, and LNG at the bottom in the LNG low-temperature loading tank 2 can be conveniently exported.
Wherein the temperature inside the LNG low-temperature storage tank 9 is-140+/-5 ℃, and the LNG low-temperature storage tank is suitable for storing LNG.
Specifically, when the LNG carrier 1 is parked to the LNG unloading position, the gas delivery pipes 29 are respectively connected between the natural gas outlet valve 4 and the natural gas inlet valve 8, the LNG liquid outlet valve 3, the immersed pump inlet 25, the immersed pump outlet 6 and the LNG liquid inlet valve 7 are respectively connected through the two liquid delivery pipes 26, the immersed pump 5, the LNG liquid outlet valve 3 and the natural gas outlet valve 4 are opened, at the moment, the natural gas at the top in the LNG low-temperature loading tank 2 is led out by the natural gas outlet valve 4 and enters the LNG low-temperature storage tank 9 through the gas delivery pipes 29, the LNG at the bottom of the LNG low-temperature loading tank 2 is led out by the LNG liquid outlet valve 3, the LNG is stored in the LNG low-temperature storage tank 9 after passing through the low-temperature pump cabin 27 in the immersed pump 5, so that the LNG is prevented from being heated and expanded in the unloading process, the pressure in the LNG low-temperature storage tank 9 is overlarge and dangerous, the LNG liquid level and the capacity of the LNG low-temperature storage tank 9 can be observed and monitored through the induction type liquid level meter 11 after the unloading is finished, and meanwhile, the natural gas and the LNG in the LNG low-temperature storage tank 9 are more conveniently distributed and taken by arranging the output exhaust valve 13 and the output drain valve 23, wherein the natural gas outlet valve 4 and the natural gas inlet valve 8 are stainless steel gas one-way valves, and the natural gas at the top of the LNG low-temperature loading tank 2 is conveniently led out; the immersed pump 5 is fixed on the installation table surface through the immersed pump fixing base 24, and the immersed pump 5 has a stable structure; the immersed pump 5 is internally provided with a low Wen Bengcang for storing LNG; the output exhaust valve 13 is provided with an exhaust pipe pressure gauge 12, so that the pressure of the output exhaust valve 13 can be conveniently observed; the liquid discharge pipe pressure gauge 30 is arranged on the output liquid discharge valve 23, so that the pressure of the output liquid discharge valve 23 can be conveniently observed; the LNG liquid outlet valve 3 and the LNG liquid inlet valve 7 are all RD high-pressure one-way valves, so that the LNG low-temperature loading tank is good in air tightness, firm and durable, and LNG at the bottom in the LNG low-temperature loading tank 2 can be conveniently exported; the temperature inside the LNG cryogenic storage tank 9 is-140+/-5 ℃, and the LNG cryogenic storage tank is suitable for storing LNG.
While the basic principles and main features of the present invention and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.

Claims (3)

1. The LNG unloading device convenient to take comprises an LNG transport vehicle (1), an LNG low-temperature loading tank (2), a immersed pump (5), an LNG low-temperature storage tank (9), an induction type liquid level meter (11), an output exhaust valve (13), a safety valve (15), a filtering valve (19), a heat exchanger (22) and an output liquid draining valve (23), and is characterized in that the LNG low-temperature loading tank (2) is installed on one side of the LNG transport vehicle (1), a natural gas outlet valve (4) is installed at the top of the tail end of the LNG low-temperature loading tank (2), a gas transmission pipe (29) is connected to the natural gas outlet valve (4), LNG low temperature loading tank (2) terminal bottom below natural gas valve (4) is installed LNG play liquid valve (3), be connected with transfer line (26) on LNG play liquid valve (3), transfer line (26) terminal is equipped with immersed pump (5), immersed pump (5) one side bottom is installed immersed pump entry (25), immersed pump (5) opposite side top is installed immersed pump export (6), transfer line (26) are connected with immersed pump (5) through immersed pump entry (25), immersed pump (5) one side is equipped with LNG low temperature holding vessel (9), LNG low temperature holding vessel (9) anterior segment outside is fixed in the installation mesa through preceding fixed plate (28), the LNG low temperature holding vessel (9) back end outside is fixed in the installation mesa through back fixed plate (10), induction type liquid level gauge (11) are installed at back fixed plate (10) top, the terminal LNG low temperature holding vessel (9) top that passes of induction type liquid level gauge (11) is located LNG low temperature holding vessel (9) inside, connect through gas-supply pipe (29) and natural gas inlet valve (8) between LNG low temperature loading vessel (2) and LNG low temperature holding vessel (9) one side top, install LNG feed liquor valve (7) on LNG low temperature holding vessel (9) of preventing under natural gas inlet valve (8), the utility model is characterized in that the immersed pump (5) is connected with the LNG low-temperature storage tank (9) through an immersed pump outlet (6) and an LNG liquid inlet valve (7), the immersed pump outlet (6) is connected with the LNG liquid inlet valve (7) through a transfusion tube (26), the top of the other side of the LNG low-temperature storage tank (9) is connected with an air duct (14), the air duct (14) is connected with an output exhaust valve (13), the air duct (14) is connected with a safety valve (15) at one side of the output exhaust valve (13), the air duct (14) between the air duct (14) and the LNG low-temperature storage tank (9) is connected with a comprehensive pipe (17), the utility model is characterized in that a pressure regulating valve (16) is arranged on the integrated pipe (17), the bottom of the integrated pipe (17) is connected with a liquid guide pipe fixing sleeve (18) and a liquid guide pipe (21), the liquid guide pipe fixing sleeve (18) is arranged on the LNG low-temperature storage tank (9), an output liquid discharge valve (23) is arranged at the top end of the liquid guide pipe (21), a filter valve (19) is arranged on the liquid guide pipe (21) between the liquid guide pipe (21) and the output liquid discharge valve (23), a liquid valve (20) is arranged on the liquid guide pipe (21) at one side of the filter valve (19), a heat exchanger (22) is arranged at the outer side of the liquid guide pipe (21) between the liquid valve (20) and the output liquid discharge valve (23), the liquid guide pipe (21) passes through the heat exchanger (22) and is connected with the output liquid discharge valve (23);
A immersed pump fixing base (24) is arranged at the bottom of the immersed pump (5), and the immersed pump (5) is fixed on the installation table top through the immersed pump fixing base (24); the immersed pump (5) is internally provided with a low Wen Bengcang (27); an exhaust pipe pressure gauge (12) is arranged on the output exhaust valve (13); a drain pipe pressure gauge (30) is arranged on the output drain valve (23); a drain pipe pressure gauge (30) is arranged on the output drain valve (23); the LNG liquid outlet valve (3) and the LNG liquid inlet valve (7) are all RD high-pressure check valves.
2. The LNG handling device of claim 1, wherein: the natural gas outlet valve (4) and the natural gas inlet valve (8) are stainless steel gas one-way valves.
3. The LNG handling device of claim 1, wherein: the temperature inside the LNG low-temperature storage tank (9) is-140+/-5 ℃.
CN201910462043.4A 2019-05-30 2019-05-30 LNG device of unloading convenient to take Active CN110081308B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0914597A (en) * 1995-06-26 1997-01-17 Chiyoda Corp Reception piping system for low temperature liquefied gas
CN105927852A (en) * 2016-07-15 2016-09-07 程同刚 Natural gas unloading method
CN205716405U (en) * 2016-05-12 2016-11-23 自贡东方通用压缩机有限公司 The loading system at station is built jointly for LNG filling station and LNG gasification station
CN205877703U (en) * 2016-07-13 2017-01-11 天津华迈燃气装备股份有限公司 Liquefied natural gas immersed pump unloading vehicle device
WO2017031986A1 (en) * 2015-08-24 2017-03-02 自贡通达机器制造有限公司 Lng fueling station employing bog energy storage and pressure differential
CN206459008U (en) * 2016-12-13 2017-09-01 北京燃气绿源达清洁燃料有限公司 Flash recovery device for steam
CN210035060U (en) * 2019-05-30 2020-02-07 河南查瑞特种设备有限公司 LNG device of unloading convenient to take

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0914597A (en) * 1995-06-26 1997-01-17 Chiyoda Corp Reception piping system for low temperature liquefied gas
WO2017031986A1 (en) * 2015-08-24 2017-03-02 自贡通达机器制造有限公司 Lng fueling station employing bog energy storage and pressure differential
CN205716405U (en) * 2016-05-12 2016-11-23 自贡东方通用压缩机有限公司 The loading system at station is built jointly for LNG filling station and LNG gasification station
CN205877703U (en) * 2016-07-13 2017-01-11 天津华迈燃气装备股份有限公司 Liquefied natural gas immersed pump unloading vehicle device
CN105927852A (en) * 2016-07-15 2016-09-07 程同刚 Natural gas unloading method
CN206459008U (en) * 2016-12-13 2017-09-01 北京燃气绿源达清洁燃料有限公司 Flash recovery device for steam
CN210035060U (en) * 2019-05-30 2020-02-07 河南查瑞特种设备有限公司 LNG device of unloading convenient to take

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