CN107388033B - A kind of liquefied natural gas supplying system and its application method - Google Patents
A kind of liquefied natural gas supplying system and its application method Download PDFInfo
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- CN107388033B CN107388033B CN201710560361.5A CN201710560361A CN107388033B CN 107388033 B CN107388033 B CN 107388033B CN 201710560361 A CN201710560361 A CN 201710560361A CN 107388033 B CN107388033 B CN 107388033B
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- water
- natural gas
- bath
- gasifier
- phase
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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
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention provides a kind of liquefied natural gas supplying system and its application methods, the system includes: liquified natural gas tank, water-bath gasifier, water-bath gasifier is connected with outlet pipe, it further include the water-bath heater of the natural gas for heating and gasifying, and the gas outlet of water-bath heater is connected to outlet pipe；Further include: phase transition heat accumulation unit, comprising: electric heater, by the phase-change material layers of electric heater accumulation of heat, and the heat exchange pipeline to exchange heat with phase-change material layers；Wherein, heat exchange pipeline is connected to form circulation line with water-bath gasifier and water-bath heater respectively.In the above-described embodiments, heat is provided to water-bath heater by phase transition heat accumulation unit, and phase transition heat accumulation unit heat storage capacity is strong, phase transition temperature is high, occupied area is few, and in natural gas system, phase-transition heat-storage is applied to the gasification and heating process of mini gas website, it realizes that energy storage daytime at night gasifies using the electricity price between peak and valley at daytime and night, can be gasification station energy saving.
Description
Technical field
The present invention relates to air supply system more particularly to a kind of liquefied natural gas supplying systems and its application method.
Background technique
By nearly accelerated development in 10 years, China's small liquid Gas Industry chain constantly improve, commercial operation pattern day
Become mature, application field constantly expands, market demand rapid growth, trade investment and business promotion application activity are lived increasingly
Thus jump is improving remote districts resident living fuel structure, raising quality of residents'life, reduction motor vehicle fuel cost, is alleviating
Urban air pollution, guarantee urban energy safety and stability supply etc. achieve the effect got instant result.
Using before liquefied natural gas, need using gasification installation by the liquefied natural gas that temperature is -153 DEG C improve to
5 DEG C or so of natural gas, heating method can be indirectly (steam heated type gasifier, hot water water bath type gasifier, naturally lead to
Wind air-bathing gasifier, forced ventilation formula gasifier, electrical heating type gasifier, solid conductive heat formula gasifier or heat-transfer fluid),
It can be direct (hot gas or submerged combustion).
Traditional liquefied natural gas gasifying device requires the external energy, and air-heating type gasifier does not have an external power supply, but
The lower area of temperature and evening cannot be applicable in well；In addition if the gas temperature after gasification is too low, it is also necessary to heat
Device heats gas, and these heats are heated by electricity.It in the prior art, can be using solar heat-preservation come for liquid
Change natural gas gasifier and heat source is provided, but solar heat-preservation ability is low, cannot be entirely that gasifier provides energy, and solar energy
Accumulation of heat night cannot use, it is also necessary to provide electric power auxiliary.
Summary of the invention
The present invention provides a kind of liquefied natural gas supplying system and its application methods, to reduce the energy of air supply system
Consumption.
The present invention provides a kind of liquefied natural gas supplying system, which includes: liquified natural gas tank, with the liquefaction
Natural gas tank is connected to by pipeline and the water-bath gasifier for the natural gas that is used to gasify, and the water-bath gasifier is connected with escape pipe
Road further includes the water-bath heater for the natural gas for being connected to the water-bath gasifier and being used for heating and gasifying, and the water-bath adds
The gas outlet of hot device is connected to the outlet pipe；Further include:
Phase transition heat accumulation unit, comprising: electric heater, by the phase-change material layers of electric heater accumulation of heat, and with the phase
The heat exchange pipeline that change material layer exchanges heat；Wherein, the heat exchange pipeline adds with the water-bath gasifier and the water-bath respectively
Hot device is connected to form circulation line.
In the above-described embodiments, heat is provided to water-bath heater by phase transition heat accumulation unit, and phase transition heat accumulation unit stores
Thermal energy power is strong, and phase transition temperature is high, and occupied area is few, and in natural gas system, phase-transition heat-storage is applied to mini gas website
Gasification and heating process, using the electricity price between peak and valley at daytime and night realize energy storage daytime at night gasify, can be gasification station
Energy saving.
In a specific embodiment, the liquified natural gas tank is also connected with tank car drainage pipe.It is let out by tank car
Liquid pipe is connect with tank car, so as to give liquified natural gas tank supplemental natural gas.
In a specific embodiment, the liquified natural gas tank is also connected with pressurization liquid-phase tube and pressurization gas phase
Pipe, wherein the pressurization liquid-phase tube and pressurization gas phase pipe are respectively used to connect with tank car boost fluid interfaces and tank car pressurization gas phase
Mouth connection；Further include:
Water-bath is pressurized gasifier, is connected to respectively with the tank car drainage pipe, the pressurization gas phase pipe and the heat exchange pipeline,
And gasified the liquefied natural gas that the tank car drainage pipe provides using the heat that the heat exchange pipeline provides；And pass through the pressurization
Gas phase pipe is by the natural gas transportation of gasification to the tank car.In tank car hypotony, gasifier gasification day is pressurized by water-bath
Right gas supplements pressure to tank car, guarantees have enough pressure that liquefied natural gas is pressed into liquified natural gas tank in tank car.
In a specific embodiment, the input terminal that the water-bath pressurization gasifier is connected to the heat exchange pipeline is set
It is equipped with the first automatic valve；
It is set respectively on the pipeline that the water-bath pressurization gasifier is connect with the tank car liquid-phase tube and the pressurization gas phase pipe
It is equipped with the second automatic valve and third automatic valve；
It further include control device, the control device controls first automatic valve, second in the pressure reduction of tank car
Automatic valve and third automatic valve are opened.Automation control is realized by control device.
In a specific embodiment, liquidometer is additionally provided on the liquified natural gas tank；The tank car drainage
The 4th automatic valve is provided on pipe, the control device is when the liquid level that the liquidometer detects is more than setting value, described in control
4th automatic valve is closed.Realize the process for automatically controlling liquid feeding.
In a specific embodiment, thermometer is provided on the outlet pipe；
Between the connector and the water-bath gasifier and the escape pipe of the water-bath heater and the outlet pipe
Outlet pipe part between the connector of road is provided with the 5th automatic valve；
The 6th automatic valve is provided on pipeline between the water-bath gasifier and the water-bath heater；
The pipeline that the water-bath heater is connect with the heat exchange pipeline is provided with the 7th automatic valve；
The control device controls described the when the temperature for the gasification natural gas that the thermometer detects is lower than setting value
Five automatic valves are closed, and the 6th automatic valve and the 7th automatic valve are opened.It automatically controls and whether gasification natural gas is heated.
In a specific embodiment, set on the pipeline between the liquified natural gas tank and the water-bath gasifier
It is equipped with the 8th automatic valve；Further include:
Detect the detector for the Gas content that liquefies in air；
Warning device；
The control device is also used to control the report when the liquefaction Gas content that the detector detects is higher than setting value
Alarm device sounds an alarm, and controls the 8th automatic valve and close.Improve safety when in use.
In a specific embodiment, the tank car drainage pipe is connected to the water-bath gasifier, and the tank car
Valve is provided on the pipeline being connected between drainage pipe and the water-bath gasifier.It is directly supplied by tank car.
In a specific embodiment, gas supply main valve, pressure regulation valve group and flow are provided on the outlet pipe
Meter.
The present invention also provides a kind of application methods of liquefied natural gas supplying system, method includes the following steps:
By phase transition heat accumulation unit to water-bath gasifier and water-bath heater heat supply；
By the natural gas in water-bath gasifier gasification liquified natural gas tank, and pass through outlet pipe for the natural gas of gasification
Supply user；
When the natural gas temperature of water-bath gasifier gasification is lower than setting value, by leading to after water-bath heater heated natural gas
Cross outlet pipe supply user.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of liquefied natural gas supplying system provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, Fig. 1 shows the structural schematic diagram of liquefied natural gas supplying system provided in this embodiment.
The embodiment of the invention provides a kind of liquefied natural gas supplying system, which includes: liquified natural gas tank 1, water
Bathe gasifier 2, water-bath heater 4 and phase transition heat accumulation unit 3；Wherein, liquified natural gas tank 1 is for storing the natural of liquid
Gas, water-bath gasifier 2 are connected to liquified natural gas tank 1 by pipeline, and the liquid day for transferring out liquified natural gas tank 1
Right gas gasifies, and the natural gas after gasification is transported to user by the outlet pipe that water-bath gasifier 2 is connected to.
In the present embodiment, water-bath gasifier 2 has been also connected with water-bath heater 4, in specific setting, sets on outlet pipe
Bypass has been set, water-bath heater 4 is provided in bypass, which gasifies natural for heated water bath gasifier 2
Gas, so that the temperature of natural gas reaches requirement.When temperature is lower, bypass is opened, by water-bath heater 4 to natural gas
It is heated.When temperature is suitable, bypass is closed, and is directly exported by outlet pipe.
It is that heat and water-bath heater 4 are provided by phase transition heat accumulation unit 3 in specific gasification and heating
And water-bath gasifier 2 is connect with phase transition heat accumulation unit 3 respectively.In specific connection, phase transition heat accumulation unit 3, comprising: electric heating
Device, by the phase-change material layers of electric heater accumulation of heat, and the heat exchange pipeline to exchange heat with phase-change material layers；Wherein, it exchanges heat
Pipeline is connected to water-bath gasifier 2 and water-bath heater 4 respectively and to form circulation line.Water-bath is added by phase transition heat accumulation unit 3
Hot device 4 provides heat, and 3 heat storage capacity of phase transition heat accumulation unit is strong, and phase transition temperature is high, and occupied area is few, in natural gas system,
The gasification and heating process that phase-transition heat-storage is applied to mini gas website are realized using the electricity price between peak and valley at daytime and night
Energy storage daytime at night, gasification, can be gasification station energy saving.
In specific setting, thermometer is provided on outlet pipe；And between the company of water-bath heater 4 and outlet pipe
Outlet pipe part between interface and water-bath gasifier 2 and outlet pipe connector is provided with the 5th automatic valve 23；Water-bath gas
Change and is provided with the 6th automatic valve 22 on the pipeline between device 2 and water-bath heater 4；What water-bath heater 4 was connect with heat exchange pipeline
Pipeline is provided with the 7th automatic valve 20；Control device is when the temperature for the gasification natural gas that thermometer detects is lower than setting value, control
The closing of the 5th automatic valve 23 is made, the 6th automatic valve 22 and the 7th automatic valve 20 are opened.Automatically control whether to gasification natural gas into
Row heating.I.e. when temperature is lower than given threshold, the 5th automatic valve 23 is closed, at this point, outlet pipe is by part (between water-bath gas
Change the part between device 2 and water-bath heater 4) it closes, the 6th automatic valve 22 is opened, and water-bath gasifier 2 and water-bath heater 4 connect
Logical, water-bath heater 4 is connected to outlet pipe, and the 7th automatic valve 20 is opened, and water-bath heater 4 is changed with phase transition heat accumulation unit 3
Heat pipeline forms the pipeline of circulation, so that phase transition heat accumulation unit 3 provides thermal energy to water-bath heater 4.
In specific setting, liquified natural gas tank 1 is also connected with tank car drainage pipe 8.Connected by tank car drainage pipe 8 and tank car
It connects, so as to give 1 supplemental natural gas of liquified natural gas tank.When specifically carrying out liquid feeding, it is additionally provided on liquified natural gas tank 1
Liquidometer, to detect the liquid level in liquified natural gas tank 1.In addition, it is provided with the 4th automatic valve 14 on tank car drainage pipe 8,
Control device when the liquid level that liquidometer detects is more than setting value, close by the 4th automatic valve 14 of control.When specifically used, pass through
Tank car drainage pipe 8 is connect with tank car, and provides liquefied natural gas to liquid natural gas tank 1 by tank car, and be arranged and liquefying
The liquid level in liquidometer detection liquified natural gas tank 1 on natural gas tank 1, when the height of detection reaches setting value, control
Device processed controls the 4th automatic valve 14 and closes, and tank car stops feed flow.
In addition, the pressure in tank car can gradually decrease in tank car feed flow, in specific setting, set on tank car drainage pipe 8
Tank car pressure gauge 30 has been set, when the pressure reduction of tank car pressure gauge 30, has illustrated the pressure reduction in tank car, at this point, to guarantee
Tank car has enough pressure that liquefied natural gas is supplied liquified natural gas tank 1, and in the present embodiment, liquified natural gas tank 1 also connects
It is connected to pressurization liquid-phase tube 6 and pressurization gas phase pipe 7, wherein pressurization liquid-phase tube 6 and pressurization gas phase pipe 7 are respectively used to be pressurized with tank car
Liquid phase interface is connected with tank car pressurization gas phase interface；Further include: water-bath be pressurized gasifier 5, respectively with tank car liquid-phase tube 6, pressurization
Gas phase pipe 7 and heat exchange pipeline connection, and the liquefaction that the heat gasification tank car liquid-phase tube 6 provided using heat exchange pipeline is provided is natural
Gas；And by being pressurized gas phase pipe 7 for the natural gas transportation of gasification to tank car.When to vehicle hypotony, gas is pressurized by water-bath
Change the gasification natural gas of device 5 and supplement pressure to tank car, guarantees have enough pressure that liquefied natural gas is pressed into liquefaction day in tank car
In right gas tank 1.In the specific implementation, the input terminal that water-bath pressurization gasifier 5 is connected to heat exchange pipeline is provided with the first automatic valve
33；Water-bath is pressurized on the pipeline that gasifier 5 is connect with tank car liquid-phase tube 6 and pressurization gas phase pipe 7 and is respectively arranged with the second automatic valve
16 and third automatic valve 15；Control device is in the pressure reduction of tank car, i.e., on the tank car drainage pipe 8 that tank car pressure gauge 30 detects
When pressure is relatively low, the first automatic valve 33 of control, the second automatic valve and third automatic valve 15 are opened.It is opened in the first automatic valve 33
When, water-bath pressurization gasifier 5 is connected to phase transition heat accumulation unit 3, and phase transition heat accumulation unit 3 provides heat to water-bath pressurization gasifier 5,
When the second automatic valve and third automatic valve 15 are opened, water-bath gasifier 2 is connected to tank car drainage pipe 8 and pressurization gas phase pipe 7, slot
Liquified natural gas in vehicle drainage pipe 8 enters water-bath gasifier 2 and carries out heating and gasifying, is conveyed later by pressurization gas phase pipe 7
It is pressurized into tank car.Guarantee that tank car can normally convey liquified natural gas.
In addition, system provided by the embodiments of the present application is to guarantee safety, in liquified natural gas tank 1 and water-bath gasifier 2
Between pipeline on be provided with the 8th automatic valve 18；The system further include: the detector for the Gas content that liquefies in detection air；Alarm
Device 34；Control device is also used to when the liquefaction Gas content that detector detects is higher than setting value, and control warning device 34 issues
Alarm, and control the 8th automatic valve 18 and close.The natural Gas content in air is detected by detector, and passes through control dress
The 8th automatic valve 18 of control and warning device 34 are set, liquified natural gas tank 1 is closed, improved when there is natural gas leaking
Safety when in use.
In addition, the system in the present embodiment can also be supplied directly by tank car, specifically, tank car drainage pipe 8 with
Water-bath gasifier 2 is connected to, and is provided with valve 21 on the pipeline being connected between tank car drainage pipe 8 and water-bath gasifier 2.In tank car
When drainage pipe 8 is connected to tank car, valve 21 is opened, liquefied natural gas is directly transported in water-bath gasifier 2 by tank car drainage pipe 8
Gasify, later, is exported by outlet pipe, and when the temperature is low, it is defeated after being heated by water-bath heater 4
Out.
In a specific embodiment, gas supply main valve, pressure regulation valve group and flowmeter are provided on outlet pipe.With
In the gas gross of adjustment and ventilation output.
In addition, in the present embodiment, in order to guarantee the safety of system, each automatic valves are corresponding to have connected one manually
Valve.
In order to facilitate system provided in this embodiment is understood, carried out below with reference to Fig. 1 and specific embodiment detailed
Description.
(1) hot gas tank car in day fills storage tank and tank car is pressurized:
When liquidometer 28 shows that liquid level is too low, need to fill day hot gas to liquified natural gas tank 1 with day hot gas tank car.Slot
Vehicle, which unloads liquid outlet hose and unloads liquid pipe 8 with tank car, to be connect, and hand-operated valve 11,13,37 is made to be in normally open, control device be switched to plus
Injection-molded automatically opens automatic valve 14, closes automatic valve 21, and the day hot gas in tank car enters liquified natural gas tank 1 and adds to storage tank
Day hot gas is infused, when tank car pressure gauge 30 shows hypotony, is that slot interior pressure is insufficient, tank car is pressurized liquid phase, gas phase certainly
Hose is separately connected tank car pressurization liquid-phase tube 6 and tank car pressurization gas phase pipe 7, and hand-operated valve 9,10 is made to be in normally open, control dress
It sets and opens automatic valve 15,16, day hot gas is pressurized after gasifier 5 gasifies by water-bath and returns to tank car gas phase to tank car increasing in tank car
Pressure.When the liquidometer 28 in storage tank detects that tank level reaches the high position that filling requires, the long-range biography of liquidometer 28 is utilized
Function up-delivering signal is sent, automatic valve 14,15,16 will be controlled by control device and closed, filling is stopped.When gas tank pressure gauge 29 is aobvious
When showing hypertonia, hand-operated valve 31,46 is made to be in normally open, system automatically controls opening gas supply main valve 32 and is vented.
(2) storage tank supplies user:
The present invention also provides a kind of application methods of liquefied natural gas supplying system, method includes the following steps:
By phase transition heat accumulation unit to water-bath gasifier and water-bath heater heat supply；
By the natural gas in water-bath gasifier gasification liquified natural gas tank, and pass through outlet pipe for the natural gas of gasification
Supply user；
When the natural gas temperature of water-bath gasifier gasification is lower than setting value, by leading to after water-bath heater heated natural gas
Cross outlet pipe supply user.
Specifically, control device, which is switched to blowing model, closes automatic valve 14, hand-operated valve 17 is set to be in normally open, automatically
Automatic valve 12 and gas supply main valve 32 are opened, the day hot gas in liquified natural gas tank 1 passes through after the gasification of water bath type gasifier 2
Pressure regulator valve 25, flowmeter 26 reach the user terminal use for being connected to air feed interface.When thermometer 27 shows that gas temperature is too low,
Keeping hand-operated valve 19 normally opened, close automatic valve 23, opens automatic valve 20,22, gas is heated by water-bath heater 4, wherein
Hand-operated valve 24 is normally open valve.
Phase transition heat accumulation unit work, water bath carburetor 2, water-bath heater 4, water-bath pressurization 5 inside water-bath of gasifier are to follow
Ring water, hot water are provided by phase transition heat accumulation unit 3.It is filled inside phase transition heat accumulation unit 3 by phase-change material, phase-change material passes through
Temperature increases after electric heating, and subsequent heat release makes the circulating water heating inside phase transition heat accumulation unit 3, and hot water is supplied respectively by pipeline
It is pressurized gasifier 5 to water bath carburetor 2, water-bath heater 4, water-bath, water bath carburetor 2, water-bath heater 4, water-bath are pressurized gas
Change after the cooling water after device 5 gasifies is recycled into phase transition heat accumulation unit 3 and reheats recycling.Daytime phase transition heat accumulation unit 3
Stop accumulation of heat, provide heat of vaporization directly to water bath carburetor 2, water-bath heater 4, water-bath pressurization gasifier 5 by electric heater,
Night phase transition heat accumulation unit 3 starts accumulation of heat and at the same time providing heat of vaporization for air supply system.
(3) emergency cut-off:
When combustible gas detecting warning device 34 or 36 is alarmed, for natural gas leakage has occurred, control device is immediately at this time
Gas supply main valve 32 is closed, prevents leakage from expanding.When low temperature detection alarm device 35 is alarmed, for a day hot gas leakage has occurred, this
When control device close gas supply main valve 32 and automatic valve 12,14,15 immediately, prevent leakage from expanding.
(4) tank car is pressurized:
It is that slot interior pressure is insufficient when tank car pressure gauge 30 shows hypotony, tank car is soft from liquid phase, gas phase is pressurized
Pipe is separately connected tank car pressurization liquid-phase tube 6 and tank car pressurization gas phase pipe 7, and hand-operated valve 9,10 is made to be in normally open, control device
Automatic valve 15,16 is opened, day hot gas is pressurized after gasifier 5 gasifies by water-bath and returns to tank car gas phase to tank car pressurization in tank car.
(5) tank car supplies user:
System is switched to tank car blowing model, closes automatic valve 14,12,18, opens automatic valve 21 and gas supply main valve 32, liquid
Change the day hot gas in natural gas tank 1 after the gasification of water bath type gasifier 2, is connected to by pressure regulator valve 25, the arrival of flowmeter 26
The user terminal of air feed interface uses.When thermometer 27 shows that gas temperature is too low, keep hand-operated valve 19 normally opened, closes automatic valve
23, automatic valve 20,22 is opened, gas is heated by water-bath heater 4, and wherein hand-operated valve 24 is normally open valve.
It can be seen from the above description that providing heat, and phase-transition heat-storage to water-bath heater by phase transition heat accumulation unit
Device heat storage capacity is strong, and phase transition temperature is high, and occupied area is few, in natural gas system, phase-transition heat-storage is applied to small-sized natural
The gasification and heating process of gas website realize that energy storage daytime at night gasifies using the electricity price between peak and valley at daytime and night, Ke Yiwei
Gasification station energy saving.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of liquefied natural gas supplying system characterized by comprising liquified natural gas tank, with the liquified natural gas tank
It is connected to by pipeline and the water-bath gasifier for the natural gas that is used to gasify, the water-bath gasifier is connected with outlet pipe, further includes
It is connected to the water-bath gasifier and the water-bath heater of the natural gas that is used for heating and gasifying, and the outlet of the water-bath heater
Mouth is connected to the outlet pipe；Further include:
Phase transition heat accumulation unit, comprising: electric heater, by the phase-change material layers of electric heater accumulation of heat, and with the phase transformation material
The heat exchange pipeline that the bed of material exchanges heat；Wherein, the heat exchange pipeline respectively with the water-bath gasifier and the water-bath heater
Connection forms circulation line.
2. liquefied natural gas supplying system as described in claim 1, which is characterized in that the liquified natural gas tank is also connected with
Tank car drainage pipe.
3. liquefied natural gas supplying system as claimed in claim 2, which is characterized in that the liquified natural gas tank is also connected with
It is pressurized liquid-phase tube and pressurization gas phase pipe, wherein the pressurization liquid-phase tube and pressurization gas phase pipe are respectively used to be pressurized liquid phase with tank car
Interface is connected with tank car pressurization gas phase interface；Further include:
Water-bath is pressurized gasifier, is connected to respectively with the tank car drainage pipe, the pressurization gas phase pipe and the heat exchange pipeline, and benefit
Gasified the liquefied natural gas that the tank car drainage pipe provides with the heat that the heat exchange pipeline provides；And pass through the pressurization gas phase
Pipe is by the natural gas transportation of gasification to tank car.
4. liquefied natural gas supplying system as claimed in claim 3, which is characterized in that water-bath pressurization gasifier with it is described
The input terminal of heat exchange pipeline connection is provided with the first automatic valve；
Second is respectively arranged on the pipeline that the water-bath pressurization gasifier is connect with tank car liquid-phase tube and the pressurization gas phase pipe
Automatic valve and third automatic valve；
It further include control device, the control device controls first automatic valve, second automatically in the pressure reduction of tank car
Valve and third automatic valve are opened.
5. liquefied natural gas supplying system as claimed in claim 4, which is characterized in that also set up on the liquified natural gas tank
There is liquidometer；The 4th automatic valve, the liquid level that the control device is detected in the liquidometer are provided on the tank car drainage pipe
When more than setting value, controls the 4th automatic valve and close.
6. liquefied natural gas supplying system as claimed in claim 5, which is characterized in that be provided with temperature on the outlet pipe
Table；
Connect between the connector and the water-bath gasifier of the water-bath heater and the outlet pipe and the outlet pipe
Outlet pipe part between interface is provided with the 5th automatic valve；
The 6th automatic valve is provided on pipeline between the water-bath gasifier and the water-bath heater；
The pipeline that the water-bath heater is connect with the heat exchange pipeline is provided with the 7th automatic valve；
For the control device when the temperature for the gasification natural gas that the thermometer detects is lower than setting value, control the described 5th is certainly
Dynamic valve is closed, and the 6th automatic valve and the 7th automatic valve are opened.
7. liquefied natural gas supplying system as claimed in claim 6, which is characterized in that the liquified natural gas tank and the water
The 8th automatic valve is provided on pipeline between bath gasifier；Further include:
Detect the detector for the Gas content that liquefies in air；
Warning device；
The control device is also used to when the liquefaction Gas content that the detector detects is higher than setting value, controls the alarm dress
It sets and sounds an alarm, and control the 8th automatic valve and close.
8. liquefied natural gas supplying system as claimed in claim 2, which is characterized in that the tank car drainage pipe and the water-bath
Gasifier connection, and valve is provided on the pipeline being connected between the tank car drainage pipe and the water-bath gasifier.
9. liquefied natural gas supplying system as described in any one of claims 1 to 8, which is characterized in that on the outlet pipe
It is provided with gas supply main valve, pressure regulation valve group and flowmeter.
10. a kind of application method of the liquefied natural gas supplying system as described in power 1, which comprises the following steps:
By phase transition heat accumulation unit to water-bath gasifier and water-bath heater heat supply；
The natural gas of gasification is supplied by the natural gas in water-bath gasifier gasification liquified natural gas tank, and by outlet pipe
User；
When the natural gas temperature of water-bath gasifier gasification is lower than setting value, by passing through after water-bath heater heated natural gas
Air pipe supplies user.
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| CN108224090B (en) * | 2017-12-28 | 2020-05-08 | 上海新奥新能源技术有限公司 | Gas supply system |
| CN108679442A (en) * | 2018-05-17 | 2018-10-19 | 岳阳凯美特电子特种稀有气体有限公司 | A kind of liquid CO 2 vapourizing unit |
| CN110836328A (en) * | 2019-10-31 | 2020-02-25 | 浙江金象科技有限公司 | Prizing tank |
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| US20140130521A1 (en) * | 2012-11-12 | 2014-05-15 | Fluor Technologies Corporation | Configurations and Methods for Ambient Air Vaporizers and Cold Utilization |
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| CN102635782A (en) * | 2012-04-11 | 2012-08-15 | 重庆巨创计量设备股份有限公司 | Emergency L-CNG (liquefied-compressed nature gas) filling skid |
| CN104728596A (en) * | 2015-03-30 | 2015-06-24 | 华南理工大学 | Double-energy-storage movable type NGH gas supplying device |
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