CN209279430U - A kind of refrigeration equipment producing liquefied natural gas - Google Patents
A kind of refrigeration equipment producing liquefied natural gas Download PDFInfo
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- CN209279430U CN209279430U CN201822272493.0U CN201822272493U CN209279430U CN 209279430 U CN209279430 U CN 209279430U CN 201822272493 U CN201822272493 U CN 201822272493U CN 209279430 U CN209279430 U CN 209279430U
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- azeotrope
- heat exchanger
- natural gas
- heat
- gas
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 41
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 23
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000003345 natural gas Substances 0.000 claims abstract description 29
- 239000002918 waste heat Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000007791 liquid phase Substances 0.000 claims abstract description 17
- 239000012071 phase Substances 0.000 claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003546 flue gas Substances 0.000 claims abstract description 5
- 230000008676 import Effects 0.000 claims description 16
- 239000007792 gaseous phase Substances 0.000 claims description 12
- 230000003139 buffering effect Effects 0.000 claims description 11
- 239000004215 Carbon black (E152) Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 8
- 229930195733 hydrocarbon Natural products 0.000 claims description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- IPLONMMJNGTUAI-UHFFFAOYSA-M lithium;bromide;hydrate Chemical compound [Li+].O.[Br-] IPLONMMJNGTUAI-UHFFFAOYSA-M 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 14
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model belongs to natural gas refrigeration liquefaction technology field, discloses a kind of refrigeration equipment for producing liquefied natural gas, including heat engine energy supplying system, multiple stage circulation cryogen compressibility and natural gas-cryogen heat-exchange system；Heat engine energy supplying system includes heat engine, generator, waste-heat recovery device and Absorption Refrigerator, and heat engine connects generator, and heat engine is also connected with waste-heat recovery device, and the thermal energy that waste-heat recovery device absorbs heat engine generation flue gas provides energy refrigeration for Absorption Refrigerator；Natural gas-cryogen heat-exchange system includes main heat exchanger and precool heat exchanger device, and precool heat exchanger device provides cooling capacity by Absorption Refrigerator.The utility model capacity usage ratio is high, and pre-cooled heat exchanger provides cooling capacity for the liquid phase of gas-liquid separator, it can be effectively reduced liquefaction energy consumption, the cooling capacity provided needed for mix refrigerant gas phase decline be provided, the temperature of device total consumption and liquefied natural gas is reduced, heat exchange efficiency is improved, energy consumption is reduced.
Description
Technical field
The utility model belongs to natural gas refrigeration liquefaction technology field, and in particular to a kind of refrigeration for producing liquefied natural gas
Equipment.
Background technique
Liquefied natural gas has the characteristics that colourless, tasteless, nontoxic and non-corrosive, volume as a kind of clean energy resource
About the 1/625 of same amount gaseous natural gas volume is widely used to the fields such as industrial, civilian, motor vehicle fuel at present.Many does not have
There is the area of natural gas resource to be all ready for solving the problems, such as industrial, civilian, motor vehicle fuel, therefore, day using liquefied natural gas
Right gas is liquefied as people's concern.
The liquefaction of natural gas mainly uses mix refrigerant or pure one-component refrigerant to freeze, wherein mainly to mix system
Based on cryogen refrigeration.Mix refrigerant liquefaction flow path is mixed with five kinds of the hydrocarbon of C1 to C5 and N2 etc. or more of multicomponent
Conjunction refrigerant be working medium, condensed, evaporated step by step, throttling expansion, obtaining the refrigerating capacity of different temperatures level, be finally reached by
The cooling purpose with liquefied natural gas of step has obtained since mix refrigerant liquefaction flow path the 1970s occurs
It is widely applied.
Existing natural gas liquefaction process mainly has: expander refrigeration, high pressure throttling refrigeration, cascade refrigeration and azeotrope
Refrigeration.
Expander refrigeration is the refrigeration and liquefaction realized by expanding machine adiabatic expansion using pressure cryogen to natural gas,
Expander refrigeration usually has Precooling unit, natural gas temperature is cooled in advance -30 DEG C~-40 DEG C using Precooling unit, often
Precooling unit has: freon Precooling unit, propane pre-cooling unit and ammonia Precooling unit；According to the difference of refrigerant, expansion
Mechanism cold has: nitrogen swell refrigeration, natural gas swell refrigeration and nitrogen-natural gas swell refrigeration；Expander refrigeration process is simple, tight
It gathers, cost is lower, but energy consumption is high.
High pressure throttling refrigeration is then to pass through the throttling adiabatic expansion of throttling set, make day natural gas boosting to high pressure
Right gas decompression, cooling and liquefaction；High pressure throttling refrigeration process is simple, compact, low cost, but system pressure is high, and system is transported safely
Row risk is big.
Cascade refrigeration is the multistage freezing carried out with refrigerants such as propane, ethane, methane, makes natural gas in multiple temperature etc.
Grade refrigerant in corresponding refrigerant heat exchanger, to be allowed to cool and liquefy；Every kind of cryogen of cascade refrigeration needs independence
Recycle compressor and respective numbers cold exchange device, long flow path, equipment are more, control is complicated.
Azeotrope refrigeration is the multicomponent mix refrigerant that is formed using the hydrocarbon of C1-C5 and nitrogen etc. as work
Matter is condensed step by step, is evaporated, is throttled, is expanded, and the refrigerating capacity of different temperatures level is obtained so that operation temperature as far as possible with
The cooling curve (Q-T) of raw natural gas close to, with reduce entropy increasing, improve efficiency.
With the development of economy, the raising of environmental protection and power conservation requirement reduces the production energy consumption of liquefied natural gas, improves production
Efficiency has important social and economic implications.
Utility model content
In order to solve the above problems existing in the present technology, it is natural to be to provide a kind of production liquefaction for the utility model aim
The refrigeration equipment of gas.
The technology employed by the present utility model is
A kind of refrigeration equipment producing liquefied natural gas, including heat engine energy supplying system, multiple stage circulation cryogen compressibility with
And natural gas-cryogen heat-exchange system；The heat engine energy supplying system includes heat engine, generator, waste-heat recovery device and absorption system
Cold, the heat engine connect generator, and heat engine is also connected with waste-heat recovery device, and waste-heat recovery device absorbs heat engine and generates flue gas
Thermal energy provides energy refrigeration for Absorption Refrigerator；
The multiple stage circulation cryogen compressibility include sequentially connected azeotrope stage compressor, level-one cooler and
Azeotrope level-one gas-liquid separator, sequentially connected azeotrope split-compressor, secondary coolers and azeotrope second level
Gas-liquid separator, sequentially connected azeotrope three-stage blower, three-level cooler and azeotrope three-level gas-liquid separator；Institute
State the import of the gaseous phase outlet connection azeotrope split-compressor of azeotrope level-one gas-liquid separator, the azeotrope two
The import of the gaseous phase outlet connection azeotrope three-stage blower of grade gas-liquid separator, the generator is azeotrope level-one pressure
Contracting machine, azeotrope split-compressor and azeotrope three-stage blower provide electric energy；
The natural gas-cryogen heat-exchange system includes main heat exchanger and precool heat exchanger device, and the precool heat exchanger device is by absorbing
Formula refrigeration machine provides cooling capacity, liquid-phase outlet, the azeotrope second level gas-liquid separator of the azeotrope level-one gas-liquid separator
Liquid-phase outlet, azeotrope three-level gas-liquid separator liquid-phase outlet be respectively connected to precool heat exchanger device import, precool heat exchanger
Device outlet is connected to main heat exchanger, and first throttle valve, second throttle, third are respectively equipped on the fluid pipe of the heat exchanger
Throttle valve, the gaseous phase outlet of the positive stream pipeline connection azeotrope three-level gas-liquid separator of the main heat exchanger, the main heat exchange
The counter-flow duct of device is connected to the import of azeotrope stage compressor, and the 4th is equipped between the positive stream pipeline and counter-flow duct
Throttle valve.
Preferably, the main heat exchanger further includes auxiliary heat exchanger, and the main heat exchanger is set with auxiliary heat exchanger using split type
Meter, first throttle valve, second throttle, third throttle valve are respectively positioned between main heat exchanger and auxiliary heat exchanger.
Preferably, the natural gas channel of the main heat exchanger is connected with heavy hydrocarbon separator.
Preferably, the waste-heat recovery device includes waste heat boiler and heat-condutive oil heat exchanger.
Preferably, the heat engine includes steam turbine, gas turbine and gas internal-combustion engine.
Preferably, the Absorption Refrigerator is lithium bromide-water refrigerating machine group.
Preferably, surge tank is additionally provided between the main heat exchanger and azeotrope stage compressor.
Preferably, mutual independent first buffering area and second buffering area there are two setting inside the surge tank, first is slow
It rushes and is respectively equipped with fluid connection pipe and air communicating pipe between area and second buffering area.
The utility model has the following beneficial effects:
1, the utility model is energized using heat engine, and high heating value energy compresses after generator is converted into electric energy for azeotrope
System uses, and low heat value energy is converted into the offer cooling capacity of Absorption Refrigerator, the benefit of energy after waste-heat recovery device recycles
With rate height.
2, the pre-cooled heat exchanger of the Absorption Refrigerator of the utility model provides cooling capacity, energy for the liquid phase of gas-liquid separator
Liquefaction energy consumption is enough effectively reduced, the cooling capacity provided needed for mix refrigerant gas phase decline is provided, device total consumption and liquid are reduced
Change the temperature of natural gas, improve heat exchange efficiency, reduces energy consumption, achieve the purpose that energy saving.
3, the utility model uses multi-stage gas-liquid separating technology, so that it is more uniform to distribute the solution-air of azeotrope, it is cold
Stream and hot-fluid heat transfer temperature difference are more nearly, and significantly reduce the energy consumption and cost in liquefaction process.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment 1；
Fig. 2 is the structural schematic diagram of the utility model embodiment 2.
In figure: 1- heat engine；2- generator；3- waste-heat recovery device；4- Absorption Refrigerator；5- azeotrope one stage of compression
Machine；6- azeotrope split-compressor；7- azeotrope three-stage blower；8- level-one cooler；9- secondary coolers；10- tri-
Grade cooler；11- azeotrope level-one gas-liquid separator；12- azeotrope second level gas-liquid separator；13- azeotrope three-level
Gas-liquid separator；14- precool heat exchanger device；15- main heat exchanger；16- first throttle valve；17- second throttle；The throttling of 18- third
Valve；The 4th throttle valve of 19-；20- auxiliary heat exchanger；21- surge tank；22- heavy hydrocarbon separator；23- purifying device for natural gas；24- liquid
Change natural gas storage tank.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further elaborated the utility model.
Embodiment 1
As shown in Figure 1, a kind of refrigeration equipment for producing liquefied natural gas of the present embodiment, including it is heat engine energy supplying system, more
Grade circulation cryogen compressibility and natural gas-cryogen heat-exchange system.Heat engine energy supplying system includes heat engine, generator, waste heat time
Receiving apparatus and Absorption Refrigerator, heat engine connect generator, and heat engine is also connected with waste-heat recovery device, and waste-heat recovery device absorbs heat
The thermal energy that machine generates flue gas provides energy refrigeration for Absorption Refrigerator.
Multiple stage circulation cryogen compressibility includes sequentially connected azeotrope stage compressor, level-one cooler and mixing
Cryogen level-one gas-liquid separator, sequentially connected azeotrope split-compressor, secondary coolers and azeotrope second level gas-liquid
Separator, sequentially connected azeotrope three-stage blower, three-level cooler and azeotrope three-level gas-liquid separator.Generator
Electric energy is provided for azeotrope stage compressor, azeotrope split-compressor and azeotrope three-stage blower.
Natural gas-cryogen heat-exchange system includes main heat exchanger and precool heat exchanger device, and precool heat exchanger device is by Absorption Refrigerator
There is provided cooling capacity, the liquid-phase outlet, mixed of the liquid-phase outlet of azeotrope level-one gas-liquid separator, azeotrope second level gas-liquid separator
The liquid-phase outlet for closing cryogen three-level gas-liquid separator is respectively connected to precool heat exchanger device import, and the outlet of precool heat exchanger device is connected to master
Heat exchanger, and it is respectively equipped with first throttle valve, second throttle, third throttle valve.
The import of the gaseous phase outlet connection azeotrope split-compressor of azeotrope level-one gas-liquid separator, azeotrope
The import of the gaseous phase outlet connection azeotrope three-stage blower of second level gas-liquid separator, azeotrope is through compressor compresses at different levels
Afterwards, the cryogen of the cryogen liquefaction of heavy constituent, light component in gaseous state and enters in natural gas-cryogen heat-exchange system to provide cooling capacity.
Precool heat exchanger device provides cooling capacity for the cryogen of liquid phase, takes full advantage of the energy that waste-heat recovery device is recycled, can be effective
Liquefaction energy consumption is reduced, the cooling capacity provided needed for mix refrigerant gas phase decline is provided.
The gaseous phase outlet of the positive stream pipeline connection azeotrope three-level gas-liquid separator of main heat exchanger, the adverse current of main heat exchanger
Pipeline is connected to the import of azeotrope stage compressor, and the 4th throttle valve is equipped between positive stream pipeline and counter-flow duct.Master changes
The natural gas channel entrance of hot device is connected with purifying device for natural gas, and natural gas channel outlet is connected with LNG tank.
The azeotrope of gas phase and the azeotrope of liquid phase are respectively that the liquefaction of natural gas provides cooling capacity, and cold flow and hot-fluid heat transfer temperature difference are more
Adjunction is close, significantly reduces energy consumption and cost in liquefaction process.
Embodiment 2
As shown in Fig. 2, a kind of refrigeration equipment for producing liquefied natural gas of the present embodiment, including it is heat engine energy supplying system, more
Grade circulation cryogen compressibility and natural gas-cryogen heat-exchange system.Heat engine energy supplying system includes heat engine, generator, waste heat time
Receiving apparatus and Absorption Refrigerator.Heat engine includes steam turbine, gas turbine and gas internal-combustion engine, and heat engine connects generator, power generation
The energy of high heating value is converted electric energy by machine, and heat engine is also connected with waste-heat recovery device, waste-heat recovery device include waste heat boiler and
Heat-condutive oil heat exchanger, the thermal energy that waste-heat recovery device absorbs heat engine generation flue gas provide energy refrigeration for Absorption Refrigerator,
In, the Absorption Refrigerator of the present embodiment uses lithium bromide-water refrigerating machine group.
Multiple stage circulation cryogen compressibility includes sequentially connected azeotrope stage compressor, level-one cooler and mixing
Cryogen level-one gas-liquid separator, sequentially connected azeotrope split-compressor, secondary coolers and azeotrope second level gas-liquid
Separator, sequentially connected azeotrope three-stage blower, three-level cooler and azeotrope three-level gas-liquid separator.Generator
Electric energy is provided for azeotrope stage compressor, azeotrope split-compressor and azeotrope three-stage blower.
Natural gas-cryogen heat-exchange system includes main heat exchanger and precool heat exchanger device, and precool heat exchanger device is by Absorption Refrigerator
There is provided cooling capacity, the liquid-phase outlet, mixed of the liquid-phase outlet of azeotrope level-one gas-liquid separator, azeotrope second level gas-liquid separator
The liquid-phase outlet for closing cryogen three-level gas-liquid separator is respectively connected to precool heat exchanger device import, and the outlet of precool heat exchanger device is connected to master
Heat exchanger, and it is respectively equipped with first throttle valve, second throttle, third throttle valve.
Surge tank is additionally provided between main heat exchanger and azeotrope stage compressor, set inside surge tank there are two mutually solely
Vertical first buffering area and second buffering area, is respectively equipped with fluid connection pipe and gas between first buffering area and second buffering area
Communicating pipe, if another buffer area can be switched in time when a buffer area is full of there are two independent buffer area.
The import of the gaseous phase outlet connection azeotrope split-compressor of azeotrope level-one gas-liquid separator, azeotrope
The import of the gaseous phase outlet connection azeotrope three-stage blower of second level gas-liquid separator, azeotrope is through compressor compresses at different levels
Afterwards, the cryogen of the cryogen liquefaction of heavy constituent, light component in gaseous state and enters in natural gas-cryogen heat-exchange system to provide cooling capacity.
Precool heat exchanger device provides cooling capacity for the cryogen of liquid phase, takes full advantage of the energy that waste-heat recovery device is recycled, can be effective
Liquefaction energy consumption is reduced, the cooling capacity provided needed for mix refrigerant gas phase decline is provided.
The gaseous phase outlet of the positive stream pipeline connection azeotrope three-level gas-liquid separator of main heat exchanger, the adverse current of main heat exchanger
Pipeline is connected to the import of azeotrope stage compressor, and the 4th throttle valve is equipped between positive stream pipeline and counter-flow duct.Master changes
Hot device further includes auxiliary heat exchanger, and main heat exchanger and auxiliary heat exchanger use split-type design, first throttle valve, second throttle, the
Three throttle valves are respectively positioned between main heat exchanger and auxiliary heat exchanger, and sufficient condensation can be obtained in natural gas in two heat exchangers.It is main
The natural gas channel entrance of heat exchanger is connected with purifying device for natural gas, and natural gas channel outlet is connected with liquefied natural gas storage
Tank, the natural gas channel of main heat exchanger are connected with heavy hydrocarbon separator, heavy hydrocarbon separator can be efficiently separated during liquefied with
The immiscible heavy hydrocarbon component of liquefied natural gas.
The gas phase azeotrope of high pressure becomes the azeotrope of low-temp low-pressure, low-temp low-pressure under the action of four throttle valves
Azeotrope becomes the azeotrope of high-temperature low-pressure after heat exchanger, provides the cooling capacity for natural gas liquefaction, finally returns to mixed
It closes in the first compressor of cryogen, so that azeotrope is Ke Xunhuanliyong.
The utility model is energized using heat engine, and high heating value energy, which compresses after generator is converted into electric energy for azeotrope, is
System uses, and low heat value energy is converted into the offer cooling capacity of Absorption Refrigerator, the utilization of energy after waste-heat recovery device recycles
Rate is high.The azeotrope of gas phase and the azeotrope of liquid phase are respectively that the liquefaction of natural gas provides cooling capacity, cold flow and hot-fluid heat exchange
The temperature difference is more nearly, and significantly reduces energy consumption and cost in liquefaction process.
The utility model is not limited to above-mentioned optional embodiment, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, making any variation in its shape or structure, all the utility model rights that falls into are wanted
The technical solution in confining spectrum is sought, is all fallen within the protection scope of the utility model.
Claims (8)
1. a kind of refrigeration equipment for producing liquefied natural gas, it is characterised in that: including heat engine energy supplying system, multiple stage circulation cryogen pressure
Compression system and natural gas-cryogen heat-exchange system；The heat engine energy supplying system include heat engine, generator, waste-heat recovery device and
Absorption Refrigerator, the heat engine connect generator, and heat engine is also connected with waste-heat recovery device, and waste-heat recovery device absorbs heat engine and produces
The thermal energy of raw flue gas provides energy refrigeration for Absorption Refrigerator；
The multiple stage circulation cryogen compressibility includes sequentially connected azeotrope stage compressor, level-one cooler and mixing
Cryogen level-one gas-liquid separator, sequentially connected azeotrope split-compressor, secondary coolers and azeotrope second level gas-liquid
Separator, sequentially connected azeotrope three-stage blower, three-level cooler and azeotrope three-level gas-liquid separator；It is described mixed
Close the import of the gaseous phase outlet connection azeotrope split-compressor of cryogen level-one gas-liquid separator, the azeotrope second level gas
The import of the gaseous phase outlet connection azeotrope three-stage blower of liquid/gas separator, the generator is azeotrope one stage of compression
Machine, azeotrope split-compressor and azeotrope three-stage blower provide electric energy；
The natural gas-cryogen heat-exchange system includes main heat exchanger and precool heat exchanger device, and the precool heat exchanger device is by absorption system
Cold provides cooling capacity, the liquid of the liquid-phase outlet of the azeotrope level-one gas-liquid separator, azeotrope second level gas-liquid separator
Phase exports, the liquid-phase outlet of azeotrope three-level gas-liquid separator is respectively connected to precool heat exchanger device import, and precool heat exchanger device goes out
Mouth is connected to main heat exchanger, and first throttle valve, second throttle, third throttling are respectively equipped on the fluid pipe of the heat exchanger
Valve, the gaseous phase outlet of the positive stream pipeline connection azeotrope three-level gas-liquid separator of the main heat exchanger, the main heat exchanger
Counter-flow duct is connected to the import of azeotrope stage compressor, and the 4th throttling is equipped between the positive stream pipeline and counter-flow duct
Valve.
2. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the main heat exchanger
It further include auxiliary heat exchanger, the main heat exchanger and auxiliary heat exchanger use split-type design, first throttle valve, second throttle, the
Three throttle valves are respectively positioned between main heat exchanger and auxiliary heat exchanger.
3. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the main heat exchanger
Natural gas channel be connected with heavy hydrocarbon separator.
4. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the waste heat recycling
Device includes waste heat boiler and heat-condutive oil heat exchanger.
5. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the heat engine includes
Steam turbine, gas turbine and gas internal-combustion engine.
6. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the absorption system
Cold is lithium bromide-water refrigerating machine group.
7. a kind of refrigeration equipment for producing liquefied natural gas according to claim 1, it is characterised in that: the main heat exchanger
Surge tank is additionally provided between azeotrope stage compressor.
8. a kind of refrigeration equipment for producing liquefied natural gas according to claim 7, it is characterised in that: in the surge tank
Portion is set there are two mutual independent first buffering area and second buffering area, is respectively equipped between first buffering area and second buffering area
Fluid connection pipe and air communicating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822272493.0U CN209279430U (en) | 2018-12-29 | 2018-12-29 | A kind of refrigeration equipment producing liquefied natural gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822272493.0U CN209279430U (en) | 2018-12-29 | 2018-12-29 | A kind of refrigeration equipment producing liquefied natural gas |
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| CN209279430U true CN209279430U (en) | 2019-08-20 |
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| CN201822272493.0U Expired - Fee Related CN209279430U (en) | 2018-12-29 | 2018-12-29 | A kind of refrigeration equipment producing liquefied natural gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553429A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | cold-carrying circulating system |
| CN112393526A (en) * | 2020-11-05 | 2021-02-23 | 华南理工大学 | Process and system for preparing LNG (liquefied Natural gas) cold-electricity cogeneration by coal-based synthesis gas cryogenic separation |
-
2018
- 2018-12-29 CN CN201822272493.0U patent/CN209279430U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553429A (en) * | 2019-08-27 | 2019-12-10 | 中国科学院理化技术研究所 | cold-carrying circulating system |
| CN110553429B (en) * | 2019-08-27 | 2021-09-17 | 中国科学院理化技术研究所 | Cold-carrying circulating system |
| CN112393526A (en) * | 2020-11-05 | 2021-02-23 | 华南理工大学 | Process and system for preparing LNG (liquefied Natural gas) cold-electricity cogeneration by coal-based synthesis gas cryogenic separation |
| CN112393526B (en) * | 2020-11-05 | 2024-04-05 | 华南理工大学 | Process and system for preparing LNG (liquefied Natural gas) combined cooling and power generation through coal-based synthesis gas cryogenic separation |
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