CN110017628A - A kind of LNG cold energy use system and method based on argon circulation - Google Patents
A kind of LNG cold energy use system and method based on argon circulation Download PDFInfo
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- CN110017628A CN110017628A CN201810021851.2A CN201810021851A CN110017628A CN 110017628 A CN110017628 A CN 110017628A CN 201810021851 A CN201810021851 A CN 201810021851A CN 110017628 A CN110017628 A CN 110017628A
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- argon
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- cold energy
- lng
- heat exchanger
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 387
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 210
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 101
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003345 natural gas Substances 0.000 claims abstract description 18
- 238000011084 recovery Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 169
- 229910052757 nitrogen Inorganic materials 0.000 claims description 85
- 239000007788 liquid Substances 0.000 claims description 47
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 38
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 claims description 36
- 238000002309 gasification Methods 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 21
- 239000000498 cooling water Substances 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 14
- 238000000746 purification Methods 0.000 claims description 13
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003949 liquefied natural gas Substances 0.000 description 109
- 238000000926 separation method Methods 0.000 description 32
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000004172 nitrogen cycle Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04278—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using external refrigeration units, e.g. closed mechanical or regenerative refrigeration units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/044—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a single pressure main column system only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/72—Refluxing the column with at least a part of the totally condensed overhead gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/62—Liquefied natural gas [LNG]; Natural gas liquids [NGL]; Liquefied petroleum gas [LPG]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/58—Quasi-closed internal or closed external argon refrigeration cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
- F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The present invention relates to the LNG cold energy use system and method recycled based on argon, LNG cold energy use system includes natural gas cold energy recovery system, the argon circulatory system and cold energy use system；Natural gas cold energy recovery system includes LNG- argon gas heat exchanger；The argon circulatory system includes the series loop being made of circulation argon throttle expansion valve, circulation argon heat exchanger, circulation argon gas compressor and LNG- argon gas heat exchanger；Cooled medium in cold energy use system is connect with the heat-releasing pipeline in circulation argon heat exchanger, for exchanging heat with the argon in circulation argon heat exchanger backheat pipeline, realizes the exchange of LNG cold energy.LNG cold energy is recycled in the LNG cold energy use system recycled based on argon.LNG cold energy use system of the invention recycles LNG cold energy by heat pump using argon gas as working medium, transmits cooled medium after improving cold energy grade using argon gas Joule-Thomson effect, can effectively improve LNG cold energy use rate.
Description
Technical field
The invention belongs to liquefied natural gas (LNG) cold energy use technical fields, are related to a kind of LNG cold energy based on argon circulation
Utilize system and method.
Background technique
China is energy-consuming in state, requires a large amount of clean energy resource natural gas of import every year as fuel or raw material.
For convenient transportation, the inlet natural gas of significant proportion is transported by sea with LNG form.LNG is by sub-cooled technique by gas
State natural gas liquefaction forms, combustion heat value contained by itself or in addition to the amount of hydrocarbon substance, and it is cold to be also attached to a large amount of high-grades
Can (- 140 DEG C -- 70 DEG C).If direct gasification is utilized as fuel or industrial chemicals, the cold energy of LNG can be wasted.
LNG gasification cold energy is mainly used for refrigerating (- 20 DEG C), low-temperature electricity-generating (- 40 DEG C), produces dry ice (- 80 at present
DEG C), the processes such as low-temperature grinding (- 140 DEG C) and cryogenic air separation unit (- 183--173 DEG C).It is said from thermodynamics, cold energy use temperature
Closer with LNG gasification temperature, the irreversibility of process is smaller, and the utilization efficiency of cold energy is higher.With above-mentioned other process phases
Than cryogenic air separation unit LNG cold energy use efficiency highest, LNG cold energy space division can save 40%-- compared with traditional full liquid space division
60% power consumption saves 70% or so cooling-water consumption, remarkable in economical benefits.
LNG cold energy space division and the main distinction of conventional full liquid space division are that conventional space division process has been done work by motor
At the compression cooling and swell refrigeration circulation of nitrogen, main consumption is electric energy, and LNG cold energy space division is then by LNG gasification process
Cold energy is supplied directly to space division system, compared with conventional space division, significantly reduces nitrogen cycle refrigeration system cyclic nitrogen compression power consumption
And cooling condensation energy consumption, process are simplified.In addition LNG gasification and generation cold energy are simultaneously, air separation plant can be made very short
A large amount of cooling capacity are obtained in time, greatly shorten starting the time, that is, open and stop, improve production efficiency, it can be achieved that system compact,
Skid.
LNG space division advantage is significant, and correlative study work both domestic and external and commercial plant are more and more, process organization Xiang Gengjie
The direction of energy is developed, and operating pressure and highest operating pressure can be respectively down to 0.35MPa, 1.5MPa.However to being at present
Only, LNG cold energy space division system only has two ways to LNG cold energy use, a kind of directly to purify sky with into tower with LNG gasification cold energy
Gas heat exchange, another is exchanged heat by LNG- nitrogen, is freezed using nitrogen cycle.
CN101532768A, CN201387202Y describe a kind of space division system using cold energy of liquefied natural gas.This is
The characteristics of system, is: LNG-nitrogen heat exchanger and nitrogen-nitrogen heat exchanger is equipped with, using pressure nitrogen gas as closed circulation medium.Nitrogen is made
For circulatory mediator, nitrogen potential heat value is compared with small, required decrement is big, energy consumption is higher, and there are the potential temperatures of nitrogen and LNG cold energy use temperature
There are unmatched phenomenons.
CN101943512A describes a kind of air separating method using cold energy of liquefied natural gas.The characteristics of this method, is: will
The nitrogen of low-temp low-pressure carries out compression and forms pressure nitrogen gas, and the pressure loss is larger during heat exchange, needs multiple compressions
Machine, this proposes higher requirement for the operating pressure of circulation line and pipe-line equipment.This method does not account for nitrogen and LNG
The existing leakage problem of heat exchange, LNG leakage can enter pressure pipeline and be recycled, and cause serious safety problem.
CN101033909A discloses a kind of air-seperation system for obtaining liquid oxygen and liquid nitrogen.The characteristics of system, is: matching
There is the three-level nitrogen compressor of low pressure, middle pressure, high pressure.Its for circulatory mediator nitrogen compression and utilize process is tedious, fortune
Capable and maintenance cost is high, does not provide specific operation standard.
CN202675796U discloses the device using LNG cold energy production liquid space division product.The characteristics of device, is: its
The pressure of liquid nitrogen is lower than nitrogen lateral pressure in nitrogen-nitrogen heat exchanger, guarantees the safety of air separation unit.But the heat exchanger need with
The nitrogen medium interface of different pressures is attached, and proposes high requirement for equipment operating pressure.
According to methane physical property, LNG atmospheric gasification, -162 DEG C of boiling point, N corresponding to the temperature2Pressure be 1.6MPa, i.e.,
Nitrogen, which is only pressed onto 1.6MPa or more, could directly utilize LNG cold energy, N2Circulating pressure high energy consumption is big.It in addition is reduction space division
Energy consumption improves separative efficiency, and air separation column needs to operate at low pressures, is usually no more than 1.0MPa.With N2To take SAPMAC method
The LNG space division efficiency of medium is lower.For being directly pre-chilled with LNG gasification cold energy into tower air flow, LNG efficiency is lower, and
It is dangerous.No matter which kind of process, LNG cold energy space division is to LNG cold energy use rate in 15%-20%, a large amount of LNG cold energy quilts at present
Waste.Therefore, how to effectively improve LNG cold energy use rate is the current technical issues that need to address.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of LNG based on argon circulation
Cold energy use system and method.The present invention is based on the LNG cold energy use systems of argon circulation to use LNG- argon gas heat exchanger, with argon gas
LNG cold energy is recycled by heat pump for working medium, transmits cooled be situated between after improving cold energy grade using argon gas Joule-Thomson effect
Matter can effectively improve LNG cold energy use rate, so that LNG cold energy use rate is increased to 90% or more, preferably realizes environmentally protective
Theory.
To solve the above problems, the present invention adopts the following technical scheme:
A kind of LNG cold energy use system based on argon circulation, the LNG cold energy use system based on argon circulation includes natural gas
Cold energy recovery system, the argon circulatory system and cold energy use system；The natural gas cold energy recovery system includes the heat exchange of LNG- argon gas
Device；The argon circulatory system includes by liquid argon pipeline, circulation argon throttle expansion valve, circulation argon heat exchanger, argon gas pipeline, circulation argon
The series loop of air compressor and LNG- argon gas heat exchanger composition；Cooled medium and circulation argon in the cold energy use system
Heat-releasing pipeline connection in heat exchanger realizes that LNG cold energy is exchanged for exchanging heat with the argon in circulation argon heat exchanger backheat pipeline
Journey.
Further, the natural gas cold energy recovery system further includes LNG feed pipe, NG(natural gas) compressor, NG be cold
But device and NG user pipe；The NG cooler includes NG heat outting pipe and cooling water product heat cal rod；The LNG feed pipe, LNG- argon
Backheat pipeline, NG compressor, NG heat outting pipe and the NG user pipe of gas heat exchanger are sequentially connected composition series via, the cooling
Water product heat cal rod is connected to cooling water recirculation system；
The circulation argon heat exchanger includes circulation argon-nitrogen gas heat exchanger, the entrance and circulation argon of the circulation argon-nitrogen gas heat exchanger
Throttling expansion valve outlet is connected, and the outlet of circulation argon-nitrogen gas heat exchanger is connected with the entrance of circulation argon gas compressor；
The cold energy use system includes nitrogen cooling system, and the nitrogen cooling system includes that gas nitrogen inlet pipeline and liquid nitrogen go out
Mouth pipeline, gas nitrogen inlet pipeline are connect with the input terminal of circulation argon-nitrogen gas heat exchanger heat-releasing pipeline, liquid nitrogen outlet conduit and circulation
The output end of argon-nitrogen gas heat exchanger heat-releasing pipeline connects.
Further, the circulation argon heat exchanger further includes circulation argon-air heat exchanger, the circulation argon-nitrogen gas heat exchange
The entrance of device is connected with circulation argon throttling expansion valve outlet, and outlet and the circulation argon-air of the circulation argon-nitrogen gas heat exchanger change
The entrance of hot device is connected, and circulation argon-air heat exchanger outlet is connected with the entrance of circulation argon gas compressor；
The cold energy use system further include purification air cooling system, the purification air cooling system include purify air into
Mouth pipeline and cold-air vent pipeline, the purification air inlet duct and circulation argon-air heat exchanger heat-releasing pipeline input
End connection, cold-air vent pipeline are connect with circulation argon-air heat exchanger heat-releasing pipeline output end.
Further, the cold energy use system further includes space division system, the outlet end of the cold-air vent pipeline with
The air inlet end of space division system is connected, and so that cold air is entered space division system and is separated, the gas nitrogen isolated by gas nitrogen into
Mouth pipeline enters heat exchange in circulation argon-nitrogen gas heat exchanger.
Further, the liquid nitrogen outlet conduit is divided into two-way, connects nitrogen products storage tank all the way, and another way connects space division
The refluxing opening of upper tower is fractionated in system.
LNG cold energy use system based on argon circulation of the invention recycles LNG cold energy by heat pump using argon gas as working medium,
Nitrogen is passed to after improving cold energy grade using argon gas Joule-Thomson effect, is used for Deep Cooling Method air separation, air deep-cooling point
It is generated from the cold energy for obtaining nitrogen (or liquid nitrogen) oxygen (or liquid oxygen) and argon gas (or liquid argon) system by LNG gasification.
The present invention also provides the cold energy use method of the LNG cold energy use system recycled based on above-mentioned argon, including it is following
Step: LNG is exchanged heat in LNG- argon gas heat exchanger with argon gas, and LNG gasification, argon gas condensation forms liquid argon, then passes through liquid argon
Pipeline enters throttle expansion valve and cools down, and enters back into circulation argon heat exchanger, realizes in circulation argon heat exchanger and cooled medium
Become gaseous state argon gas after heat exchange, subsequently enters the pressurization of argon gas compressor, re-enter LNG- argon gas heat exchanger condensed absorbent
LNG cold energy, moves in circles, and realizes LNG cold energy exchange process.
Further, vapor pressure of the LNG in LNG- argon gas heat exchanger is 0.1MPa -1.0MPa, corresponding temperature
Are as follows: -162 DEG C--124 DEG C.
Further, argon gas pressure limit after recycling argon gas compressor is 0.7MPa -4.8MPa, corresponding temperature
Are as follows: -162 DEG C--122 DEG C.
Further, circulation argon pressure after throttling expansion is 0.1MPa -1.6MPa, and temperature is -186 DEG C--148
℃.Preferred pressure range is 0.1MPa -0.7MPa, and temperature is -186 DEG C--163 DEG C.
Further, the cooled medium includes nitrogen, and the circulation argon heat exchanger includes circulation argon-nitrogen gas heat exchange
Device, in circulation argon-nitrogen gas heat exchanger, nitrogen pressure is 0.1MPa -3.4MPa, and temperature is -186 DEG C--147 DEG C.It is preferred that pressing
Power range is 0.1MPa -1.5MPa, and temperature is -186 DEG C--163 DEG C.
Further, the cooled medium further includes purification air, and the circulation argon heat exchanger further includes circulation argon-sky
Gas heat exchanger, corresponding cooling procedure are as follows: LNG feed pipe is attached by pipeline and LNG- argon gas heat exchanger, in LNG-
Cold energy is exchanged and gives circulation argon gas by LNG gasification in argon gas heat exchanger, argon gas condensation, LNG.NG after release cold energy enters NG compression
Machine and NG cooler are compressed and are cooled down, and are passed through at pipeline to each user by the pressure that user needs；In LNG- argon gas
The liquid argon that LNG cryogenic cold energy is formed is obtained in heat exchanger, by pipeline enter throttle expansion valve by Joule-Thomson effect into
Row cooling, subsequently into circulation argon-nitrogen gas heat exchanger, the liquid argon gasification in circulation argon-nitrogen gas heat exchanger, nitrogen condensation, liquid argon
High-grade cold energy is transmitted to gaseous nitrogen atmosphere.The gaseous state argon gas for recycling argon-nitrogen gas heat exchanger out then passes through piping connection and enters circulation
Argon-air heat exchanger, further recycling circulation argon cold energy, pressurizes subsequently into argon gas compressor, re-enter LNG- argon gas
Heat exchanger condensed absorbent LNG cold energy, moves in circles.Space division system is passed to after LNG cold energy is upgrade by this process；
Further, the gas nitrogen (GN from space division system2) be condensed into after recycling argon-nitrogen gas heat exchanger absorption liquid argon cold energy
Liquid nitrogen (LN2), LN2Space division system is returned, partially for flowing back, remaining is as product；Air by purification is through recycling argon-
Air heat exchanger enters air separation column after absorption cycle argon gas cold energy and is separated；Recirculated cooling water passes through NG cooler, to compression
NG afterwards cools down, and is then return to recirculating cooling water system.
Beneficial effect
(1) boiling point is above nitrogen under the critical-temperature and uniform pressure of argon gas, between nitrogen and methane.Using argon as following
Ring medium solves the rigors that LNG- nitrogen directly exchanges heat to nitrogen pressure.Relative to nitrogen cycle, argon circulation can be wider
LNG gasification pressure limit in recycle LNG cold energy, and recycle argon refrigeration compression ratio it is lower than nitrogen cycle, to save compression
Machine power consumption realizes that LNG cold energy use efficiency maximizes；
(2) by circulation argon refrigeration, LNG cold energy can be increased to -184 DEG C or more by -162 DEG C under normal pressure, improved cold
Energy grade, the high-grade cold energy can be directly used for low pressure space division system, improve space division rectifying column separative efficiency, reduce space division system
Investment；
(3) argon gas latent heat is higher than nitrogen, and compared to the nitrogen circulation in general LNG cold energy space division system, the tolerance of argon gas circulation is few,
Low energy consumption；
(4) it is recycled using argon gas, can avoid LNG and directly exchange heat with air dielectric, prevent natural gas leaking from causing into space division system
Safety problem, keep whole system safer.
Detailed description of the invention
Fig. 1 is that the present invention is based on the LNG cold energy use systems that argon recycles；
Fig. 2 is LNG cold energy use system based on argon circulation of the present invention with space division system；
Wherein, 1-LNG feed pipe, 2-LNG- argon gas heat exchanger, 3-NG compressor, 4-NG cooler, 401- cooling water inlet pipe,
402- cooling water outlet pipe, 5-NG user pipe, 6- circulation argon throttle expansion valve, 601- liquid argon pipeline, 7- circulation argon-nitrogen gas change
Hot device, 701-GN2Inlet pipeline, 702-LN2Outlet conduit, 8- recycle argon-air heat exchanger, 801- purifies air inlet duct,
802- cold-air vent pipeline, 9- recycle argon gas compressor, 901- argon gas pipeline, 10- air separation column, 1001- air separation column nitrogen product
Outlet conduit, 1002- air separation column dirt nitrogen outlet conduit, 1003- air separation column oxygen product outlet conduit.
Specific embodiment
The invention will be further elucidated with reference to specific embodiments.It should be understood that these embodiments are merely to illustrate this hair
It is bright rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, art technology
Personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Fixed range.
Embodiment 1
Fig. 1 is the LNG cold energy use system based on argon circulation, including natural gas cold energy recovery system, the argon circulatory system and cold energy
Utilize system；Natural gas cold energy recovery system includes LNG- argon gas heat exchanger 2；The argon circulatory system includes by liquid argon pipeline 601, follows
Ring argon throttle expansion valve 6, circulation argon heat exchanger, argon gas pipeline 901, circulation argon gas compressor 9 and LNG- argon gas heat exchanger 2 form
Series loop；Cooled medium in cold energy use system is connect with the heat-releasing pipeline in circulation argon heat exchanger, for follow
Argon heat exchange in ring argon heat exchanger backheat pipeline, realizes LNG cold energy exchange process.
Further, natural gas cold energy recovery system further includes that LNG feed pipe 1, NG compressor 3, NG cooler 4 and NG are used
Family pipeline 5；NG cooler 4 includes NG heat outting pipe and cooling water product heat cal rod；The product heat cal rod of LNG feed pipe, LNG- argon gas heat exchanger 2
Road, NG compressor 3, NG heat outting pipe and NG user pipe 5 are sequentially connected composition series via, and cooling water product heat cal rod passes through cold respectively
But water inlet pipe 401, cooling water outlet pipe 402 are connected to cooling water recirculation system；The liquefaction that LNG in the application refers to is natural
Gas, what NG was referred to is natural gas.
Further, circulation argon heat exchanger includes circulation argon-nitrogen gas heat exchanger 7 and circulation argon-air heat exchanger 8, circulation
The entrance of argon-nitrogen gas heat exchanger 7 with circulation argon throttle expansion valve 6 outlet is connected, circulation argon-nitrogen gas heat exchanger 7 outlet with follow
Ring argon-air heat exchanger 8 entrance is connected, the outlet and the entrance phase of circulation argon gas compressor 9 of circulation argon-air heat exchanger 8
Even；Cold energy use system includes nitrogen cooling system, and nitrogen cooling system includes gas nitrogen inlet pipeline 701 and liquid nitrogen outlet conduit
702, gas nitrogen inlet pipeline 701 with circulation 7 heat-releasing pipeline of argon-nitrogen gas heat exchanger input terminal connect, liquid nitrogen outlet conduit 702 and
Recycle the output end connection of 7 heat-releasing pipeline of argon-nitrogen gas heat exchanger.
Cold energy use system further includes purification air cooling system, and purification air cooling system includes purification air intlet pipe
Road 801 and cold-air vent pipeline 802, purification air inlet duct 801 are defeated with circulation 8 heat-releasing pipeline of argon-air heat exchanger
Enter end connection, cold-air vent pipeline 802 is connect with the output end of circulation 8 heat-releasing pipeline of argon-air heat exchanger.
Further, the LNG cold energy use system based on argon circulation to be shown in Fig. 2 with space division system；Cold energy benefit
It further include space division system with system, the air of the air separation column 10 in the outlet end and space division system of cold-air vent pipeline 802 enters
Mouth end is connected, and cold air is made to enter space division in space division system, carries out rectifying separation, in air separation column 10, nitrogen overhead passes through pipe
Road 701 is condensed into liquid nitrogen into condenser 7, then returns to air separation column by liquid nitrogen reflux pipeline 702, is divided into two-way, connects all the way
Nitrogen products storage tank is connect, nitrogen product is become by air separation column nitrogen products export pipeline 1001, another way connects in space division system
After the refluxing opening of tower cools down air separation column in fractionation, the dirty nitrogen of air separation column passes through 1002 row of air separation column dirt nitrogen outlet conduit
Out, oxygen product 1003 is finally obtained by air separation column oxygen product outlet conduit in air separation column tower bottom.Space division system of the invention with
The prior art is identical.
The working principle of LNG cold energy use system based on argon circulation of the invention is as follows: LNG cold energy discharges system, LNG
Enter LNG- argon gas heat exchanger 2 by feed pipe 1, the LNG gasification in LNG- argon gas heat exchanger 2, argon gas condensation, LNG is by cold energy
It exchanges and gives circulation argon gas.NG after release cold energy, which enters NG compressor 3 and is compressed to user, requires pressure, enters back into NG cooler 4
It cools down, is then sent by NG user pipe 5 to user.NG cooler 4 carries out taking heat using recirculated cooling water, follows
Ring cooling water is connect by cooling water intake and water outlet with circular water treating system；Argon refrigeration system is recycled, argon gas is recycled
LNG cryogenic cold energy is obtained in LNG- argon gas heat exchanger 2 and forms liquid argon, is passed through by liquid argon pipeline 601 into throttle expansion valve 6
Joule-Thomson effect cools down, and subsequently into circulation argon-nitrogen gas heat exchanger 7, liquid argon gasifies in this heat exchanger, nitrogen
High-grade cold energy is transmitted to liquid nitrogen by condensation, liquid argon.Out recycle argon-nitrogen gas heat exchanger 7 low temperature gas argon then pass through piping connection into
Enter and recycle argon-air heat exchanger 8, air cooling will be purified herein, further recycling circulation argon cold energy, the argon gas after re-heat pass through
Argon gas pipeline 901 enters compressor 9 and pressurizes, the cooling of re-enter LNG- argon gas heat exchanger 2, condensed absorbent LNG cold energy, circulation
Back and forth, space division system is passed to after LNG cold energy being upgrade；Nitrogen condensation and air precooling system, come from space division system
The GN of system2Entered after circulation argon-nitrogen gas heat exchanger 7 absorbs liquid argon cold energy by pipeline 701 and is condensed into LN2, LN2Pass through pipeline 702
Return space division system；The purified air inlet duct 801 of air by purification enters circulation argon-air heat exchanger, into one
Air separation column is entered by cold-air vent pipeline 802 after step absorption cycle argon gas cold energy and carries out rectifying separation, in air separation column 10,
Nitrogen overhead passes through GN2Inlet pipeline 701 is condensed into liquid nitrogen into condenser 7, then returns to sky by liquid nitrogen outlet conduit 702
Divide tower, partially remaining is nitrogen product as flowing back, and the dirty nitrogen of air separation column is discharged by pipeline, is produced in air separation column tower bottom acquirement oxygen
Product.
Embodiment 2
The cold energy use method of LNG cold energy use system based on argon circulation of the invention, using the LNG cold energy use for implementing 1
System, specific as follows: LNG normal pressure (0.1MPa) gasification: LNG enters LNG- argon gas heat exchanger by feed pipe, carries out herein normal
Calming the anger, temperature are -162 DEG C, are further exchanged heat with gas argon after gasification, and the NG of re-heat enters NG compressor pressure after release cold energy
It is reduced to user and requires pressure, then sent by pipeline to user after NG cooler is cooled down with recirculated cooling water.Carry out self-loopa argon
The argon gas of compressor, pressure 0.8MPa, in LNG- argon gas heat exchanger by with LNG exchange heat, obtain LNG cold energy be condensed into-
160 DEG C of liquid argon enters after throttle expansion valve cooled down by Joule-Thomson effect by pipeline, in circulation argon-nitrogen gas
Liquid argon cold energy is transmitted to liquid nitrogen in heat exchanger.Recycle the operation pressure that pressure of the argon after throttle expansion valve depends on air separation column
Power.If air separation column operating pressure is 0.35MPa, -182 DEG C of temperature of tower top nitrogen, then pressure of the argon after throttle expansion valve is recycled
Power can be taken as 0.15MPa, and the corresponding having temperature of circulation is -184 DEG C, (make temperature to realize and LNG cold energy is upgrade
Spend lower) transmitting of backward space division system.
Comparative example 1
As a comparison, LNG atmospheric gasification is according to the nitrogen cycle method of other patents, then need for nitrogen to be compressed to 1.7MPa with
On, the gasification cold energy of normal pressure LNG could be absorbed.The argon endless form of this patent, argon gas compression pressure only need to 0.8MPa,
And because having latent heat is bigger than nitrogen, argon gas internal circulating load is relatively small, realizes the efficient utilization of LNG cold energy.
Embodiment 3
The cold energy use method of LNG cold energy use system based on argon circulation of the invention, using the LNG cold energy use for implementing 1
System, specific as follows: LNG gasification pressure 0.3MPa: the LNG that pressure is 0.3MPa enters the heat exchange of LNG- argon gas by feed pipe
Device gasifies herein, and temperature is -146 DEG C, through exchanging heat with circulation argon, enters NG compressor compresses extremely after discharging cold energy re-heat
User requires pressure, then is sent by pipeline to user after NG cooler is cooled down with recirculated cooling water.Carry out the compression of self-loopa argon
The argon gas of machine, pressure 1.9MPa obtain LNG cold energy and are condensed into -144 DEG C by exchanging heat with LNG in LNG- argon gas heat exchanger
Liquid argon, enter after throttle expansion valve cooled down by Joule-Thomson effect by pipeline, in circulation argon-nitrogen gas heat exchange
Liquid argon cold energy is transmitted to liquid nitrogen in device, recycles the operating pressure that pressure of the argon after throttle expansion valve depends on air separation column.If
Air separation column operating pressure is 0.8MPa, then -172 DEG C of temperature of its tower top nitrogen, then it is desirable to recycle pressure of the argon after throttle expansion valve
For 0.3MPa, the corresponding having temperature of circulation is -174 DEG C, to realize upgrades and (keeps temperature lower) LNG cold energy
The transmitting of backward space division system.
Comparative example 2
As a comparison, -146 DEG C of the LNG gasification temperature of pressure 0.3MPa has been approached nitrogen critical point (pressure 3.35MPa, temperature -
147 DEG C), LNG cold energy can not be recycled using the nitrogen cycle method of other patents.The argon endless form of this patent, Ke Yi
LNG gasification cold energy (- 162 DEG C--124 DEG C of corresponding temperature) is recycled within the scope of pressure 0.1MPa -1.0MPa, wider
Low temperature range in realize LNG cold energy efficient utilization.
Embodiment 4
The cold energy use method of LNG cold energy use system based on argon circulation of the invention, using the LNG cold energy use for implementing 1
System, specific as follows: LNG gasification pressure 1.0MPa: the LNG that pressure is 1.0MPa enters the heat exchange of LNG- argon gas by feed pipe
Device gasifies herein, and temperature is -124 DEG C, through exchanging heat with circulation argon, enters NG compressor compresses extremely after discharging cold energy re-heat
User requires pressure, then is sent by pipeline to user after NG cooler is cooled down with recirculated cooling water.Carry out the compression of self-loopa argon
The argon gas of machine, pressure 4.8MPa obtain LNG cold energy and are condensed into -123 DEG C by exchanging heat with LNG in LNG- argon gas heat exchanger
Liquid argon, enter after throttle expansion valve cooled down by Joule-Thomson effect by pipeline, in circulation argon-nitrogen gas heat exchange
Liquid argon cold energy is transmitted to liquid nitrogen in device, recycles the operating pressure that pressure of the argon after throttle expansion valve depends on air separation column.If
Air separation column operating pressure is 1.5MPa, then -162 DEG C of temperature of its tower top nitrogen, then it is desirable to recycle pressure of the argon after throttle expansion valve
For 0.6MPa, the corresponding having temperature of circulation is -164 DEG C, to realize upgrades and (keeps temperature lower) LNG cold energy
The transmitting of backward space division system.
The method that the present invention is disclosed and proposed, those skilled in the art can suitably change condition by using for reference present disclosure
The links such as route are realized, although method and technology of preparing of the invention is described by preferred embodiment, related skill
Art personnel can obviously not depart from the content of present invention, be modified in spirit and scope to methods and techniques described herein route
Or reconfigure, to realize final technology of preparing.In particular, it should be pointed out that all similar replacements and change are to ability
It is it will be apparent that they are considered as being included in spirit of that invention, range and content for field technique personnel.
Claims (10)
1. a kind of LNG cold energy use system based on argon circulation, it is characterised in that: the LNG cold energy use based on argon circulation
System includes natural gas cold energy recovery system, the argon circulatory system and cold energy use system；The natural gas cold energy recovery system packet
Include LNG- argon gas heat exchanger；The argon circulatory system include by liquid argon pipeline, circulation argon throttle expansion valve, circulation argon heat exchanger,
The series loop of argon gas pipeline, circulation argon gas compressor and LNG- argon gas heat exchanger composition；Quilt in the cold energy use system
Cooling medium is connect with the heat-releasing pipeline in circulation argon heat exchanger, for exchanging heat with the argon in circulation argon heat exchanger backheat pipeline,
Realize LNG cold energy exchange process.
2. a kind of LNG cold energy use system based on argon circulation according to claim 1, it is characterised in that: described natural
Gas cold energy recovery system further includes LNG feed pipe, NG compressor, NG cooler and NG user pipe；The NG cooler includes
NG heat outting pipe and cooling water product heat cal rod；The LNG feed pipe, the backheat pipeline of LNG- argon gas heat exchanger, NG compressor, NG heat release
Pipe and NG user pipe are sequentially connected composition series via, and the cooling water product heat cal rod is connected to cooling water recirculation system；
The circulation argon heat exchanger includes circulation argon-nitrogen gas heat exchanger, the entrance and circulation argon of the circulation argon-nitrogen gas heat exchanger
Throttling expansion valve outlet is connected, and the outlet of circulation argon-nitrogen gas heat exchanger is connected with the entrance of circulation argon gas compressor；
The cold energy use system includes nitrogen cooling system, and the nitrogen cooling system includes that gas nitrogen inlet pipeline and liquid nitrogen go out
Mouth pipeline, gas nitrogen inlet pipeline are connect with the input terminal of circulation argon-nitrogen gas heat exchanger heat-releasing pipeline, liquid nitrogen outlet conduit and circulation
The output end of argon-nitrogen gas heat exchanger heat-releasing pipeline connects.
3. a kind of LNG cold energy use system based on argon circulation according to claim 2, it is characterised in that: the circulation
Argon heat exchanger further includes circulation argon-air heat exchanger, the entrance and circulation argon throttle expansion valve of the circulation argon-nitrogen gas heat exchanger
Outlet is connected, and the outlet of the circulation argon-nitrogen gas heat exchanger is connected with circulation argon-air heat exchanger entrance, the circulation argon-
The outlet of air heat exchanger is connected with the entrance of circulation argon gas compressor；
The cold energy use system further include purification air cooling system, the purification air cooling system include purify air into
Mouth pipeline and cold-air vent pipeline, the purification air inlet duct and circulation argon-air heat exchanger heat-releasing pipeline input
End connection, cold-air vent pipeline are connect with circulation argon-air heat exchanger heat-releasing pipeline output end.
4. a kind of LNG cold energy use system based on argon circulation according to claim 3, it is characterised in that: the cold energy
It further include space division system using system, the outlet end of the cold-air vent pipeline is connected with the air inlet end of space division system,
Make cold air enter space division system to be separated, the gas nitrogen isolated enters circulation argon-nitrogen gas by gas nitrogen inlet pipeline and exchanges heat
Heat exchange in device.
5. a kind of LNG cold energy use system based on argon circulation according to claim 4, it is characterised in that: the liquid nitrogen
Outlet conduit is divided into two-way, connects nitrogen products storage tank all the way, and another way connects the refluxing opening that upper tower is fractionated in space division system.
6. the cold energy use method of -5 any LNG cold energy use systems based on argon circulation according to claim 1, special
Sign is, comprising the following steps: LNG exchanges heat in LNG- argon gas heat exchanger with argon gas, LNG gasification, argon gas condensation forms liquid
Then argon enters throttle expansion valve by liquid argon pipeline and cools down, enter back into circulation argon heat exchanger, circulation argon heat exchanger with
Cooled medium becomes gaseous state argon gas after realizing heat exchange, subsequently enters the pressurization of argon gas compressor, re-enter LNG- argon gas
Heat exchanger condensed absorbent LNG cold energy, moves in circles, and realizes LNG cold energy exchange process.
7. the cold energy use method of the LNG cold energy use system according to claim 6 based on argon circulation, feature exist
In vapor pressure of the LNG in LNG- argon gas heat exchanger is 0.1MPa -1.0MPa, corresponding temperature are as follows: -162 DEG C--124
℃。
8. the cold energy use method of the LNG cold energy use system according to claim 6 based on argon circulation, feature exist
In argon gas pressure limit after recycling argon gas compressor is 0.7MPa -4.8MPa, corresponding temperature are as follows: -162 DEG C--122
℃。
9. the cold energy use method of the LNG cold energy use system according to claim 6 based on argon circulation, feature exist
In recycling argon pressure after throttling expansion is 0.1MPa -1.6MPa, and temperature is -186 DEG C--148 DEG C.
10. the cold energy use method of the LNG cold energy use system according to claim 6 based on argon circulation, feature exist
In the cooled medium includes nitrogen, and the circulation argon heat exchanger includes circulation argon-nitrogen gas heat exchanger, in circulation argon-nitrogen gas
In heat exchanger, nitrogen pressure is 0.1MPa -3.4MPa, and temperature is -186 DEG C--147 DEG C.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021851.2A CN110017628A (en) | 2018-01-10 | 2018-01-10 | A kind of LNG cold energy use system and method based on argon circulation |
| PCT/CN2019/070799 WO2019137359A1 (en) | 2018-01-10 | 2019-01-08 | Lng cold energy utilization system and method based on argon cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810021851.2A CN110017628A (en) | 2018-01-10 | 2018-01-10 | A kind of LNG cold energy use system and method based on argon circulation |
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| CN110017628A true CN110017628A (en) | 2019-07-16 |
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| CN201810021851.2A Withdrawn CN110017628A (en) | 2018-01-10 | 2018-01-10 | A kind of LNG cold energy use system and method based on argon circulation |
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| WO (1) | WO2019137359A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350814A (en) * | 2021-05-25 | 2021-09-07 | 哈尔滨工业大学 | Deep evaporation concentration system of jet compression type heat pump |
| CN114017666A (en) * | 2021-11-04 | 2022-02-08 | 中建安装集团有限公司 | Water bath type natural gas gasification system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO346152B1 (en) | 2020-09-21 | 2022-03-28 | Rondane Teknologi As | A system for conditioning of LNG |
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Also Published As
| Publication number | Publication date |
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| WO2019137359A1 (en) | 2019-07-18 |
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