CN108506726A - A kind of unloading system of cryogenic liquid tank lorry, method of unloading - Google Patents

A kind of unloading system of cryogenic liquid tank lorry, method of unloading Download PDF

Info

Publication number
CN108506726A
CN108506726A CN201810322454.9A CN201810322454A CN108506726A CN 108506726 A CN108506726 A CN 108506726A CN 201810322454 A CN201810322454 A CN 201810322454A CN 108506726 A CN108506726 A CN 108506726A
Authority
CN
China
Prior art keywords
cryogenic liquid
regenerator
liquid storage
storage tank
cryogenic
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
CN201810322454.9A
Other languages
Chinese (zh)
Other versions
CN108506726B (en
Inventor
彭国干
韦育强
杨山举
刘青
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.)
Qingdao Le Ge Xin Energy Technology Co Ltd
Original Assignee
Qingdao Le Ge Xin Energy Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Le Ge Xin Energy Technology Co Ltd filed Critical Qingdao Le Ge Xin Energy Technology Co Ltd
Priority to CN201810322454.9A priority Critical patent/CN108506726B/en
Publication of CN108506726A publication Critical patent/CN108506726A/en
Application granted granted Critical
Publication of CN108506726B publication Critical patent/CN108506726B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0304—Heat exchange with the fluid by heating using an electric heater
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0344—Air cooling
    • F17C2227/0346—Air cooling by forced circulation, e.g. using a fan
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F17C2227/0348—Water cooling
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • 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
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/046—Methods for emptying or filling by even emptying or filling
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • 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 a kind of unloading systems of cryogenic liquid tank lorry, belong to pressure conveying technology field, including cryogenic liquid storage tank, cryogenic liquid storage tank lower end and tank car piping connection, cryogenic liquid storage tank upper end and regenerator piping connection, the side far from cryogenic liquid storage tank is provided with room temperature pressure charging system on regenerator, and the cryogenic gas in cryogenic liquid storage tank enters room temperature pressure charging system from regenerator.The technical solution extracts compression cryogenic gas using room temperature pressure charging system, establish the pressure difference between cryogenic liquid storage tank and the tank car for carrying cryogenic liquid, the generation for reducing the flash steam of cryogenic liquid increases the service life of system, achievees the purpose that Quick-unloading.It unloads method the present invention also provides one kind, the method of unloading, which can unload cryogenic gas overbottom pressure down to 0.1Mpa, to be lost hereinafter, reducing caused by tank car takes away overbottom pressure, while also reducing cryogenic liquid tank lorry again before entrucking, it is wasted caused by needing row pressure, reduces the loss of energy resources.

Description

A kind of unloading system of cryogenic liquid tank lorry, method of unloading
Technical field
The present invention relates to a kind of unloading systems of cryogenic liquid tank lorry, and using the unloading system of the cryogenic liquid tank lorry Method of unloading, belong to pressure conveying technology field.
Background technology
The unloading way of cryogenic liquid tank lorry mainly has unloading and low temperature immersed pump from supercharging for cryogenic liquid tank lorry at present It unloads, the two unloads vehicle speed all relatively slowly, while the former needs cryogenic liquid to gasify, and causes extraneous incoming system thermal more, after Person needs to consume more electric energy, while cryogenic liquid will be increased by immersed pump temperature.Due to cryogenic liquid after unloading The overbottom pressure of tank car is higher, forms not clean situation of unloading, is needed again in cryogenic liquid tank lorry before entrucking since overbottom pressure is higher Gas diffused, cause prodigious waste.
Invention content
To solve problems of the prior art, the present invention provides a kind of unloading system of cryogenic liquid tank lorry, energy Unloading for cryogenic liquid tank lorry is realized in enough superchargings at normal temperatures.Specific technical solution is as follows：
A kind of unloading system of cryogenic liquid tank lorry, including cryogenic liquid storage tank, the cryogenic liquid storage tank lower end and slot Vehicle piping connection, the cryogenic liquid storage tank upper end and regenerator piping connection, far from cryogenic liquid storage tank on the regenerator Side be provided with room temperature pressure charging system, the cryogenic gas in the cryogenic liquid storage tank from regenerator enter room temperature supercharging system System, cryogenic gas are heated up and are pressurized by room temperature pressure charging system, tank car is linked into using regenerator and boost to tank car.
As an improvement of the above technical solution, the room temperature pressure charging system includes the first air temperature type heat exchanger, the second air temperature Formula heat exchanger, four-way reversing valve, compressor and check valve.
As an improvement of the above technical solution, the room temperature pressure charging system further includes cooling device and oil return apparatus, gas After compressor compresses four-way reversing valve is returned to through apparatus for supercooling and oil return apparatus and then from oil return apparatus successively.
As an improvement of the above technical solution, the oil return apparatus is connected to compressor circuit, the oil return apparatus and pressure Third valve is provided between contracting machine.
As an improvement of the above technical solution, the regenerator includes shell side first interface, shell side second interface, tube side The shell side first interface piping connection of one interface, tube side second interface, the cryogenic liquid storage tank upper end and regenerator, described The shell side second interface piping connection of two air temperature type heat exchangers and regenerator, the pipe of the first air temperature type heat exchanger and regenerator The tube side second interface of journey first interface piping connection, the regenerator is docked with tank car.
As an improvement of the above technical solution, between the shell side first interface and tube side second interface piping connection and It is provided with the first valve on the pipeline, the second valve is provided on the pipeline between the cryogenic liquid storage tank and tank car.
Above-mentioned technical proposal extracts compression cryogenic gas using room temperature pressure charging system, establishes cryogenic liquid storage tank and carries Pressure difference between the tank car of cryogenic liquid, since compressor is run under normal temperature state always, the system compared to it is existing from Supercharging is unloaded or mode that cryogenic pump is unloaded, reduces the generation of the flash steam of cryogenic liquid, need not to compressor into Row adiabatic operation increases the service life of system, achievees the purpose that Quick-unloading.
The present invention also provides a kind of methods of unloading of the unloading system using cryogenic liquid tank lorry, which is characterized in that packet Include following steps：
Step 1, cryogenic gas heating, the cryogenic gas in cryogenic liquid storage tank is heated up by regenerator；
Step 2, room temperature pressure-increasing unit, gas of the cryogenic gas after regenerator heats up enter the second air temperature type and change Hot device is further heated to room temperature, is cooled down by entering cooling device from check valve after compressor boost, then into Enter oil return apparatus and fully remove oil contained in gas, then four-way reversing valve, the oil in oil return apparatus are returned from oil return apparatus Compressor is returned to by the pipeline of bottom end；
Step 3, gas cooling force feed, compressed gas access the gas phase interface pair of tank car after regenerator cools down Tank car boosts, and the cryogenic liquid in tank car enters cryogenic liquid storage tank by the second valve, unloads.
As an improvement of the above technical solution, in the step 1, the cryogenic gas in cryogenic liquid storage tank enters back Before hot device, concora crush is carried out by the first valve between cryogenic liquid storage tank and tank car.
As an improvement of the above technical solution, in the step 3, after the completion of unloading, the second valve, switching four are closed Lead to reversal valve, the cryogenic gas in tank car enters room temperature pressure charging system by regenerator, and cryogenic gas is by room temperature supercharging system System heats up and is pressurized, is entered in cryogenic liquid storage tank using regenerator.
As an improvement of the above technical solution, in the step 3, when slot interior pressure is down to 0.1Mpa hereinafter, stopping will Cryogenic gas is pressurized to by room temperature pressure charging system in cryogenic liquid storage tank.
Cryogenic gas overbottom pressure can be unloaded down to 0.1Mpa and be made hereinafter, reducing and taking away overbottom pressure because of tank car by the above-mentioned method of unloading At loss, while also reducing cryogenic liquid tank lorry again before entrucking, wasted caused by needing row pressure, reduce energy resources Loss, advantageous effect are notable.
Description of the drawings
Fig. 1 is a kind of pipeline schematic diagram of the unloading system of cryogenic liquid tank lorry of the present invention.
Fig. 2 is a kind of application schematic diagram of the unloading system of cryogenic liquid tank lorry of the present invention.
Specific implementation mode
As shown in Figure 1 and Figure 2, the present invention provides a kind of unloading systems of cryogenic liquid tank lorry, including cryogenic liquid storage tank 4,4 lower end of cryogenic liquid storage tank and 1 piping connection of tank car, 4 upper end of cryogenic liquid storage tank and 5 piping connection of regenerator, regenerator 5 The upper side far from cryogenic liquid storage tank 4 is provided with room temperature pressure charging system, and the cryogenic gas in cryogenic liquid storage tank 4 is from regenerator 5 enter room temperature pressure charging system, and cryogenic gas is heated up and is pressurized by room temperature pressure charging system, is linked into slot using regenerator 5 Vehicle 1 simultaneously boosts to tank car 1.
Room temperature pressure charging system includes the first air temperature type heat exchanger 6, the second air temperature type heat exchanger 7, four-way reversing valve 8, compression Machine 9, check valve 10, cooling device 12 and oil return apparatus 14.Gas exchanges heat by the first air temperature type heat exchanger 6 or the second air temperature type Device 7 enters channel, successively through 12 He of apparatus for supercooling after being compressed using compressor 9 by the switching gas of four-way reversing valve 8 Then oil return apparatus 14 returns to four-way reversing valve 8 from oil return apparatus 14.Oil return apparatus 14 and 9 pipeline connection of compressor, oil return dress It sets and is provided with third valve 15 between 14 and compressor 9, third valve 15 can control the oil in oil return apparatus 14 back to pressure It is recycled in contracting machine 9.In the program, oil return apparatus 14 has gas phase entrance e, oil outlet g and gaseous phase outlet f, through overcompression Gas afterwards is entered from gas phase entrance e in oil return apparatus 14 through apparatus for supercooling 12, and oil return apparatus 5 has effectively recycled compressor 9 are discharged institute's entrained oil in gases, and the oil in oil return apparatus 5 is entered from oil outlet g in compressor 9, and oil return apparatus 5 is operated in Room temperature warm area, without adiabatic and rewarming measure, the gas for removing oil enters four-way reversing valve 8 by gaseous phase outlet f.
In said program, regenerator 5 includes shell side first interface a, shell side second interface d, tube side first interface c, tube side Second interface b, the shell side first interface a piping connections of 4 upper end of cryogenic liquid storage tank and regenerator 5, the second air temperature type heat exchanger 7 It is managed with the tube side first interface c of the shell side second interface d piping connections of regenerator 5, the first air temperature type heat exchanger 6 and regenerator 5 Road connects, and the tube side second interface b of regenerator 5 is docked with tank car 1.Regenerator 5 can be that for example shell changes in the technical solution This kind of heat-exchanger rig of hot device, plate-fin heat exchanger is regenerator between the shell side first interface a and shell side second interface d of regenerator 5 5 shell side heat exchanger channels change between the tube side first interface c and tube side second interface b of regenerator 5 for the tube side of regenerator 5 The passage of heat, during the unloading of cryogenic liquid in tank car 1, the cryogenic gas in cryogenic liquid storage tank 4 enter room temperature supercharging When in system, temperature increases, and then gas after pressure build up in room temperature pressure charging system, is entering back into tank car 1 and to slot Vehicle 1 boosts.
Existing air temperature type heater may be used in first air temperature type heat exchanger 6 and the second air temperature type heat exchanger 7, electricity adds Other heating devices such as heat, heating water bath, the cooling structures such as water cooling, air-cooled may be used in cooling device 12, such as may be used Fan 13 carries out air-cooled cooling.Four-way reversing valve 8 can change two triple valves or four two-port valves into, and the four of four-way reversing valve A channel is separately connected the first air temperature type heat exchanger 6, the second air temperature type heat exchanger 7, compressor 9 and oil return apparatus 14.
Further, piping connection between shell side first interface a and tube side second interface b is provided with first on the pipeline Valve 3 is provided with the second valve 2 on the pipeline between cryogenic liquid storage tank 4 and tank car 1.
Below to be illustrated for carrying the tank car of low-temperature liquefaction natural gas, method of specifically unloading is as follows：
Step 1, cryogenic gas heating, the inlet of cryogenic liquid storage tank 4 are connected with the liquid outlet of tank car 1, tank car 1 Gas phase interface is connected with the tube side second interface b of regenerator 5, after carrying out and unloading preparation, by the low temperature in cryogenic liquid storage tank 4 Gas is evacuated to regenerator 5 by compressor 9 and heats up；
In this step, the cryogenic gas in cryogenic liquid storage tank 4 enters before regenerator 5, can pass through the first valve Concora crush is carried out between 3 pairs of cryogenic liquid storage tanks 4 of door and tank car 1, if for example, the pressure in cryogenic liquid storage tank 4 is higher than in tank car 1 Pressure when, the gas flow cryogenic liquid tank lorry 1 in cryogenic liquid storage tank 4, when the pressure and tank car in cryogenic liquid storage tank 4 When pressure in 1 is equal, the first valve 3 is closed, opens the second valve 2；
Step 2, room temperature pressure-increasing unit, gas of the cryogenic gas after the heating of regenerator 5 enter the second air temperature type and change Hot device 7 is further heated to room temperature, is cooled down from check valve 10 into cooling device 12 after being pressurized by compressor 9, Oil contained in gas is fully removed subsequently into oil return apparatus 14, then four-way reversing valve 8, oil return are returned from oil return apparatus 14 Oil in device 14 returns to compressor 9 by the pipeline of bottom end；
Step 3, gas cooling force feed, compressed gas access the gas phase interface of tank car 1 after the cooling of regenerator 5 It boosts to tank car 1, the cryogenic liquid in tank car 1 enters cryogenic liquid storage tank 4 by the second valve 2, unloads.
The method that this method of unloading extracts compression cryogenic gas using the compressor 9 under room temperature, is established with the method Pressure difference between cryogenic liquid storage tank 4 and tank car 1, the pressure difference established using compressor 9, to realize the purpose of Quick-unloading.
In this step, after the completion of unloading, the second valve 2 is closed, switches four-way reversing valve 8, the cryogenic gas in tank car 1 Room temperature pressure charging system is entered by regenerator 5, cryogenic gas heats up and is pressurized, using regenerator by room temperature pressure charging system 5 enter in cryogenic liquid storage tank 4, and the fluid entering channel of four-way reversing valve 8 switches at this time, the low temperature gas in tank car 1 Body enters the tube side heat exchanger channels of regenerator 5 by the tube side second interface b of regenerator 5, enters via tube side first interface c It is further heated to room temperature to the first air temperature type heat exchanger 6, compressor 9 is then entered by four-way reversing valve 8, through overcompression Then 9 compressed gas of machine returns to four-way reversing valve successively through apparatus for supercooling 12 and oil return apparatus 14 from oil return apparatus 14 8, shell side second interface d then is entered from the pipeline of the second air temperature type heat exchanger 7, by heat exchange, gas occur when regenerator 5 Then temperature reduction is entered from shell side first interface a in cryogenic liquid storage tank 4.When in tank car 1 pressure be down to 0.1Mpa with Under, cryogenic gas is pressurized to by room temperature pressure charging system in cryogenic liquid storage tank 4 by stopping, being unloaded using this system, can Unloading cryogenic gas overbottom pressure in tank car 1 down to 0.1Mpa, reduces and lost caused by tank car 1 takes away overbottom pressure, while also subtracting Few tank car 1 before entrucking, wastes caused by needing row pressure again, reduces the loss of energy resources.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.

Claims (9)

1. a kind of unloading system of cryogenic liquid tank lorry, which is characterized in that including cryogenic liquid storage tank (4), the cryogenic liquid Storage tank (4) lower end and tank car (1) piping connection, cryogenic liquid storage tank (4) upper end and regenerator (5) piping connection, it is described The side far from cryogenic liquid storage tank (4) is provided with room temperature pressure charging system on regenerator (5), and the cryogenic liquid storage tank (4) is interior Cryogenic gas enter room temperature pressure charging system from regenerator (5), cryogenic gas heats up and is pressurized, again by room temperature pressure charging system It is linked into tank car (1) by regenerator (5) and boosts to tank car (1).
2. a kind of unloading system of cryogenic liquid tank lorry as described in claim 1, which is characterized in that the room temperature pressure charging system Including the first air temperature type heat exchanger (6), the second air temperature type heat exchanger (7), four-way reversing valve (8), compressor (9) and check valve (10), the room temperature pressure charging system further includes cooling device (12) and oil return apparatus (14), and gas is after compressor (9) compression Successively four-way reversing valve (8) is returned to through apparatus for supercooling (12) and oil return apparatus (14) and then from oil return apparatus (14).
3. a kind of unloading system of cryogenic liquid tank lorry as claimed in claim 2, which is characterized in that the room temperature pressure charging system Further include cooling device (12) and oil return apparatus (14), gas is after compressor (9) compression successively through apparatus for supercooling (12) Four-way reversing valve (8), the oil return apparatus (14) and compressor are returned with oil return apparatus (14) and then from oil return apparatus (14) (9) pipeline connection is provided with third valve (15) between the oil return apparatus (14) and compressor (9).
4. a kind of unloading system of cryogenic liquid tank lorry as described in any one of claim 2-3, which is characterized in that described time Hot device (5) includes shell side first interface (a), shell side second interface (d), tube side first interface (c), tube side second interface (b), institute State shell side first interface (a) piping connection of cryogenic liquid storage tank (4) upper end and regenerator (5), the second air temperature type heat exchange Shell side second interface (d) piping connection of device (7) and regenerator (5), the first air temperature type heat exchanger (6) and regenerator (5) Tube side first interface (c) piping connection, the tube side second interface (b) of the regenerator (5) docks with tank car (1).
5. a kind of unloading system of cryogenic liquid tank lorry as claimed in claim 4, which is characterized in that the shell side first interface (a) the first valve (3), the cryogenic liquid storage tank are provided on piping connection and the pipeline between tube side second interface (b) (4) it is provided with the second valve (2) on the pipeline between tank car (1).
6. a kind of method of unloading of the unloading system of cryogenic liquid tank lorry described in application claim 5, which is characterized in that including Following steps：
Step 1, cryogenic gas heating, the cryogenic gas in cryogenic liquid storage tank (4) is heated up by regenerator (5)；
Step 2, room temperature pressure-increasing unit, gas of the cryogenic gas after regenerator (5) heating enter the heat exchange of the second air temperature type Device (7) is further heated to room temperature, is carried out from check valve (10) into cooling device (12) after being pressurized by compressor (9) It is cooling, oil contained in gas is fully removed subsequently into oil return apparatus (14), then return to four-way from oil return apparatus (14) and change To valve (8), the oil in oil return apparatus (14) returns to compressor (9) by the pipeline of bottom end；
Step 3, gas cooling force feed, the gas phase interface of compressed gas access tank car (1) after regenerator (5) cooling It boosts to tank car (1), the cryogenic liquid in tank car (1) enters cryogenic liquid storage tank (4) by the second valve (2), carries out It unloads.
7. method as claimed in claim 6 of unloading, which is characterized in that low in cryogenic liquid storage tank (4) in the step 1 Wet body enters before regenerator (5), is put down by the first valve (3) between cryogenic liquid storage tank (4) and tank car (1) Pressure.
8. method as claimed in claim 6 of unloading, which is characterized in that in the step 3, after the completion of unloading, close second Valve (2) switches four-way reversing valve (8), and the cryogenic gas in tank car (1) enters room temperature pressure charging system by regenerator (5), Cryogenic gas is heated up and is pressurized by room temperature pressure charging system, entered using regenerator (5) in cryogenic liquid storage tank (4).
9. method as claimed in claim 10 of unloading, which is characterized in that in the step 3, when tank car (1), interior pressure is down to 0.1Mpa is hereinafter, stop cryogenic gas being pressurized in cryogenic liquid storage tank (4) by room temperature pressure charging system.
CN201810322454.9A 2018-04-11 2018-04-11 Unloading system and unloading method of low-temperature liquid tank car Active CN108506726B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810322454.9A CN108506726B (en) 2018-04-11 2018-04-11 Unloading system and unloading method of low-temperature liquid tank car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810322454.9A CN108506726B (en) 2018-04-11 2018-04-11 Unloading system and unloading method of low-temperature liquid tank car

Publications (2)

Publication Number Publication Date
CN108506726A true CN108506726A (en) 2018-09-07
CN108506726B CN108506726B (en) 2024-01-19

Family

ID=63381695

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810322454.9A Active CN108506726B (en) 2018-04-11 2018-04-11 Unloading system and unloading method of low-temperature liquid tank car

Country Status (1)

Country Link
CN (1) CN108506726B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110410665A (en) * 2019-08-19 2019-11-05 连云港市拓普科技发展有限公司 A kind of liquefied gas at low temp tank car unloading system
CN110469771A (en) * 2019-08-13 2019-11-19 中国寰球工程有限公司 The liquefied natural gas unloading system of novel quick start

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1837671A (en) * 2005-03-25 2006-09-27 安徽华光玻璃集团有限公司 An unloading method for liquid ammonia-transporting tank lorry
CN102182919A (en) * 2011-03-26 2011-09-14 宁波鲍斯能源装备股份有限公司 Device and method for recovery and reliquefaction of boil-off gas of liquefied natural gas
CN104456071A (en) * 2014-12-08 2015-03-25 日照海达尔加气设备有限公司 Liquefied natural gas tanker unloading device and method
CN105020577A (en) * 2015-07-29 2015-11-04 重庆耐德能源装备集成有限公司 LNG unloading method capable of achieving accurate measurement and LNG unloading measurement device
CN105179930A (en) * 2015-09-30 2015-12-23 赛鼎工程有限公司 Liquefied natural gas tank car unloading device of liquefied natural gas and compressed natural gas cooperative station and application
CN105783419A (en) * 2016-03-30 2016-07-20 重庆耐德能源装备集成有限公司 Natural gas precooling device and precooling control method
CN206572217U (en) * 2016-08-18 2017-10-20 河北冰峰制冷设备安装工程有限公司 Natural air cooling device
CN208058411U (en) * 2018-04-11 2018-11-06 青岛乐戈新能源科技有限公司 A kind of unloading system of cryogenic liquid tank lorry

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1837671A (en) * 2005-03-25 2006-09-27 安徽华光玻璃集团有限公司 An unloading method for liquid ammonia-transporting tank lorry
CN102182919A (en) * 2011-03-26 2011-09-14 宁波鲍斯能源装备股份有限公司 Device and method for recovery and reliquefaction of boil-off gas of liquefied natural gas
CN104456071A (en) * 2014-12-08 2015-03-25 日照海达尔加气设备有限公司 Liquefied natural gas tanker unloading device and method
CN105020577A (en) * 2015-07-29 2015-11-04 重庆耐德能源装备集成有限公司 LNG unloading method capable of achieving accurate measurement and LNG unloading measurement device
CN105179930A (en) * 2015-09-30 2015-12-23 赛鼎工程有限公司 Liquefied natural gas tank car unloading device of liquefied natural gas and compressed natural gas cooperative station and application
CN105783419A (en) * 2016-03-30 2016-07-20 重庆耐德能源装备集成有限公司 Natural gas precooling device and precooling control method
CN206572217U (en) * 2016-08-18 2017-10-20 河北冰峰制冷设备安装工程有限公司 Natural air cooling device
CN208058411U (en) * 2018-04-11 2018-11-06 青岛乐戈新能源科技有限公司 A kind of unloading system of cryogenic liquid tank lorry

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110469771A (en) * 2019-08-13 2019-11-19 中国寰球工程有限公司 The liquefied natural gas unloading system of novel quick start
CN110469771B (en) * 2019-08-13 2023-12-22 中国寰球工程有限公司 Novel liquefied natural gas unloading system capable of being started quickly
CN110410665A (en) * 2019-08-19 2019-11-05 连云港市拓普科技发展有限公司 A kind of liquefied gas at low temp tank car unloading system
CN110410665B (en) * 2019-08-19 2024-03-01 连云港市拓普科技发展有限公司 Unloading system for low-temperature liquefied gas tank wagon

Also Published As

Publication number Publication date
CN108506726B (en) 2024-01-19

Similar Documents

Publication Publication Date Title
CN104132487B (en) Air source heat pump system of double-pressure control
CN105370408B (en) A kind of heat accumulating type compressed-air energy-storage system
JP6571491B2 (en) heat pump
CN107732371B (en) Heat storage system and electric automobile
US10668412B2 (en) Automatic filter cleaning apparatus, automatic filter cleaning method using the same, and supercritical fluid power generation system including the same
CN108506726A (en) A kind of unloading system of cryogenic liquid tank lorry, method of unloading
CN208058411U (en) A kind of unloading system of cryogenic liquid tank lorry
CN105588365B (en) A kind of heat-flash type outdoor unit, heat pump system and its control method
CN106704195A (en) Screw air compressor waste heat recovery device
CN106196730A (en) A kind of air energy Water temp controller group and use its water-bath system
CN208382299U (en) Residual heat using device based on phase-change heat-exchange technology
US20220341426A1 (en) Heat recovery device
CN209639297U (en) A kind of airborne Double-working-condition cooling device
CN210905599U (en) Zero-gas-loss compression heat regeneration dryer for variable loads
CN107270536A (en) A kind of cascade type heat pump
CN2208204Y (en) Recovery, regenerative and recharging device for refrigerant
CN209053648U (en) A kind of S-CO2Energy source and power converting system
CN207661982U (en) The air-source water heater circulatory system
CN100460747C (en) Natural gas unloading system pipe network improving and released cold quantity utilizing technology
CN216557684U (en) Heat exchange device and air energy water heater
CN217330288U (en) Parallel refrigerant water supply device
CN218467788U (en) Waste heat recovery system of air compressor
CN202813848U (en) Conduction oil recovery system of trough type solar thermal power generation system
CN204301350U (en) A kind of heat pump
CN108562080A (en) A kind of air source heat pump intelligent defrosting system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant