CN109339973A - A kind of cold energy of liquefied natural gas utilizes system - Google Patents
A kind of cold energy of liquefied natural gas utilizes system Download PDFInfo
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- CN109339973A CN109339973A CN201811473504.XA CN201811473504A CN109339973A CN 109339973 A CN109339973 A CN 109339973A CN 201811473504 A CN201811473504 A CN 201811473504A CN 109339973 A CN109339973 A CN 109339973A
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- heat exchanger
- natural gas
- liquefied natural
- cold energy
- stirling generator
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/045—Controlling
- F02G1/047—Controlling by varying the heating or cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
- F02G1/055—Heaters or coolers
-
- 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D13/00—Stationary devices, e.g. cold-rooms
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The present invention provides a kind of cold energy of liquefied natural gas to utilize system, has liquefied natural gas unit, which has liquefied natural gas fluid reservoir；Stirling generator has cool end heat exchanger and hot end heat exchanger；Air supply unit has First Heat Exchanger, the second heat exchanger, the first control valve, the second control valve and burner；And freezer unit, there is First Heat Exchanger, ethylene glycol solution pump, third heat exchanger and freezer.Stirling generator is set to generate electricity using the very big temperature difference that cool end heat exchanger and hot end heat exchanger both ends generate, the cryogenic natural gas exported from stirling generator cool end heat exchanger can be freezer refrigerating, the combustion tail gas discharged from stirling generator hot end heat exchanger can heat up to cryogenic natural gas, generating efficiency of the invention is greatly improved compared with conventional Power Generation Mode, energy is taken full advantage of, the discharge of greenhouse gases and pernicious gas is reduced.
Description
Technical field
The present invention relates to a kind of cryogenic cold energy utilization systems, and in particular to a kind of cold energy of liquefied natural gas utilization system
System.
Background technique
With the continuous development of economic globalization, global energy reserves are more nervous, traditional energy shortage and ecological environment
The problems such as pollution, restricts China's sustainable economic development, while the existing electricity generation system in China has that generated energy is smaller, generating efficiency
It is lower and cause the problems such as seriously polluting.
Natural gas is widely used in the every field such as human production life as a kind of high-quality clean energy resource, has height
Calorific value, pollution less, reserves the features such as reaching, development prospect is wide.For the ease of the storage and transport of natural gas, need to be processed into
Low-temperature liquefaction natural gas.Liquefied natural gas can discharge a large amount of cold energy during gasification, and tradition utilizes seawater or the gas of air
Change mode will will cause cooling capacityHuge waste, if by cold energy be fully applicable to power generation will the effectively save energy, optimization works as
Preceding energy resource structure obtains preferable economic benefit, while meeting the developing direction of social low-carbon, environmental protection.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of cold energy of liquefied natural gas utilizes system
System, using the cryogenic cold energy of liquefied natural gas, heat exchanger and stirling generator are effectively combined, while can provide for freezer low
Warm environment, energy-saving, environment-friendly and high-efficiency, utility value with higher.
The present invention provides a kind of cold energy of liquefied natural gas to utilize system, has liquefied natural gas unit, and the liquefaction is natural
Gas unit has the liquefied natural gas fluid reservoir for storing liquefied natural gas；
Stirling generator has cool end heat exchanger and hot end heat exchanger；
Air supply unit has First Heat Exchanger, the second heat exchanger, the first control valve, the second control valve and burner；And
Freezer unit has First Heat Exchanger, ethylene glycol solution pump, third heat exchanger and freezer,
Wherein, liquefied natural gas fluid reservoir is connected by pipeline with stirling generator, and stirling generator passes through pipe
Road is connected with the first pipe of First Heat Exchanger, and the first pipe of First Heat Exchanger is connected by pipeline with the second heat exchanger
It is logical；
Ethylene glycol solution pump is connected by the second pipe of First Heat Exchanger with First Heat Exchanger, and the of First Heat Exchanger
Two pipelines are connected by pipeline with third heat exchanger, and third heat exchanger is connected by pipeline with ethylene glycol solution pump, third
Heat exchanger is placed in freezer；
Second heat exchanger is connected by the first branch with city natural gas pipe network, and the first control valve is arranged in the first branch
On, the second heat exchanger is connected by second branch with burner, and the second control valve is arranged in second branch, burner setting
On hot end heat exchanger, burner is connected by exhaust pipe with the second heat exchanger.
It is utilized in system in cold energy of liquefied natural gas provided by the invention, can also have the following features: Stirling hair
The internal working medium that motor uses is helium or hydrogen.
In cold energy of liquefied natural gas provided by the invention using in system, it is natural to can also have the following features: liquefaction
The liquified natural gas of gas unit output provides cold source for the internal working medium that stirling generator uses, into the natural gas of burner
Combustion heating hot end heat exchanger provides heat source for internal working medium, and the temperature difference between cool end heat exchanger and hot end heat exchanger drives Si Te
The work of woods generator.
It is utilized in system in cold energy of liquefied natural gas provided by the invention, can also have the following features: natural gas combustion
The thermal energy of burning makes hot end heat exchanger temperature rise to 600 DEG C or more.
In cold energy of liquefied natural gas provided by the invention using in system, liquid natural can also have the following features:
The temperature of gas is -165 DEG C~-155 DEG C.
In cold energy of liquefied natural gas provided by the invention using in system, the first heat exchange can also have the following features:
The natural gas temperature of device output is -35 DEG C~-25 DEG C.
In cold energy of liquefied natural gas provided by the invention using in system, it is molten to can also have the following features: ethylene glycol
Ethylene glycol solution in liquid pump is by the temperature of ethylene glycol solution after First Heat Exchanger progress heat exchange by -30 DEG C~-20 DEG C
It is down to -35 DEG C~-25 DEG C.
In cold energy of liquefied natural gas provided by the invention using in system, the second heat exchange can also have the following features:
The temperature of the natural gas of device output is 15 DEG C~25 DEG C.
The action and effect of invention
According to the present invention related cold energy of liquefied natural gas utilize system, due to using the natural air cooling of low temperature liquid this
The cool end heat exchanger of special woods generator and the hot end heat exchanger that stirling generator is heated using combustion of natural gas, send out Stirling
The cold and hot both ends of motor generate the very big temperature difference to make stirling generator generate electricity, and generating efficiency is substantially mentioned compared with conventional Power Generation Mode
It is high.The low temperature exported from the cool end heat exchanger of stirling generator can be naturally freezer refrigerating, from the heat of stirling generator
End heat exchanger discharge combustion tail gas can heat up to cryogenic natural gas, take full advantage of energy, reduce greenhouse gases and
The discharge of pernicious gas meets energy-saving and emission-reduction, the requirement of green low-carbon.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the cold energy of liquefied natural gas in the embodiment of the present invention one using system.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed cold energy of liquefied natural gas of the invention using system.
<embodiment one>
Fig. 1 is structural schematic diagram of the cold energy of liquefied natural gas in the embodiment of the present invention one using system.
As shown in Figure 1, cold energy of liquefied natural gas using system there is liquefied natural gas fluid reservoir 1, low temperature valve 2, cold end to change
Hot device 3, hot end heat exchanger 4, stirling generator 5, electricity output end 6, First Heat Exchanger 7, ethylene glycol solution pump 8, third heat exchange
Device 9, the second heat exchanger 10, the first control valve 11, freezer 12, the second control valve 13, burner 14, first branch L1, second
Road L2 and exhaust pipe L3.
Wherein, stirling generator 5 has cool end heat exchanger 3, hot end heat exchanger 4 and electricity output end 6, and burner 14 is set
It sets on hot end heat exchanger 4.
Wherein, First Heat Exchanger 7 has first pipe and second pipe, and first pipe is natural gas line, second pipe
For ethylene glycol pipeline.Cryogenic natural gas and ethylene glycol solution carry out heat exchange in First Heat Exchanger 7.
Wherein, first branch L1 and second branch L2 intersects at A, to the natural gas tube of city natural gas pipe network from A
Road is first branch L1, and the first control valve 11 is arranged on first branch L1；To the natural gas input of burner 14 from A
Natural gas line is second branch L2, and the second control valve 13 is arranged on second branch L2.
It wherein, is exhaust pipe L3 to the pipeline of environment from the tail gas output end of hot end heat exchanger 4.
Liquefied natural gas fluid reservoir 1, low temperature valve 2, cool end heat exchanger 3, the first pipe of First Heat Exchanger 7 and second are changed
Hot device 10 is sequentially connected logical by natural gas line.Urban household pipe network is connected by first branch L1 with the second heat exchanger 10
Logical, burner 14 is connected by second branch L2 with the second heat exchanger 10, and burner 14 passes through tail gas branch L3 and big gas phase
Connection.
Ethylene glycol solution pump 8, the second pipe of First Heat Exchanger 7, third heat exchanger 9 are sequentially connected by ethylene glycol pipeline
It is logical to form ethylene glycol solution circulation loop.
- 165 DEG C~-155 DEG C of liquefied natural gas in liquefied natural gas fluid reservoir 1 is by LNG pipeline through low
After warm valve 2, into the natural gas input (not indicated in Fig. 1) of the cool end heat exchanger 3 of stirling generator 5.Liquefied natural gas
Gasify in cool end heat exchanger 3, in stirling generator 5 working medium helium or hydrogen cold source is provided, make 3 He of cool end heat exchanger
Required temperature is dropped to as the helium of working medium or the temperature of hydrogen.
The high pressure low temperature natural gas come out from the natural gas output end (not indicated in Fig. 1) of cool end heat exchanger 3, through natural gas
The input terminal (not indicating in Fig. 1) that pipeline enters the natural gas line of First Heat Exchanger 7 is warming up to -35 DEG C~-25 DEG C, and will be cold
Amount passes to the ethylene glycol solution in ethylene glycol pipeline, realizes the cooling to product in freezer 12.
Ethylene glycol solution enters first by ethylene glycol pipeline from the output end (not indicating in Fig. 1) of ethylene glycol solution pump 8
The input terminal (not indicating in Fig. 1) of the ethylene glycol pipeline of heat exchanger is exported by First Heat Exchanger 7 and from cool end heat exchanger 3
Cryogenic natural gas carries out heat exchange, and the temperature of ethylene glycol solution is down to -35 DEG C~-25 DEG C from -30 DEG C~-20 DEG C, at this time from cold
The cryogenic natural gas that end heat exchanger 3 exports is warming up to -35 DEG C~-25 DEG C.Ethylene glycol solution after cooling is from First Heat Exchanger 7
The output end (not indicating in Fig. 1) of ethylene glycol pipeline enters the third heat exchanger 9 being placed in freezer 12 by ethylene glycol pipeline
Ethylene glycol input terminal, heat exchange is carried out by product in third heat exchanger 9 and freezer 12, provides cold source for freezer.So
Ethylene glycol solution enters ethylene glycol by ethylene glycol pipeline from the ethylene glycol output end (not indicating in Fig. 1) of third heat exchanger 9 afterwards
The ethylene glycol input terminal (not indicating in Fig. 1) of solution pump 8 enters ethylene glycol solution pump 8, completes the circulation of freezer unit.
The cryogenic gaseous natural gas exported from the output end (not indicating in Fig. 1) of the natural gas line of First Heat Exchanger 7 is logical
The natural gas input (not indicating in Fig. 1) that natural gas line enters the second heat exchanger 10 is crossed, is heated up by the second heat exchanger 10
It is divided into after being exported from the natural gas output end (not indicated in Fig. 1) of the second heat exchanger 10 to natural gas line after to 15 DEG C~25 DEG C
Two parts, a portion enter city natural gas pipe network (not indicating in Fig. 1) by first branch L1 to be delivered to user；
Another part is delivered to the natural gas input (not indicating in Fig. 1) of burner 14 by second branch L2, then
It burns in burner 14.The thermal energy of combustion of natural gas makes hot end heat exchanger 4 be warming up to 600 DEG C or more, is stirling generator 5
Heat source is provided, the high pressure hydrogen or helium as working medium inside stirling generator 5 are heated.
The huge temperature difference of cool end heat exchanger 3 and hot end heat exchanger 4 makes stirling generator 5 work, and produces electricl energy, generation
Electric energy is delivered to electrical equipment (not indicating in Fig. 1) by the electricity output end 6 of stirling generator 5.
Tail gas after burner 14 burns passes through exhaust pipe L3 from the tail gas output end (not indicating in Fig. 1) of burner 14
Into the second heat exchanger 10.By the second heat exchanger 10, the heat transfer of tail gas is given from the natural gas line of First Heat Exchanger 7
The cryogenic natural gas of output end (not indicating in Fig. 1) output simultaneously is allowed to be warming up to 15 DEG C~25 DEG C, then passes through exhaust pipe L3
It is emitted into atmosphere.
The action and effect of embodiment
The cold energy of liquefied natural gas according to involved in the present embodiment utilizes system, due to utilizing the natural air cooling of low temperature liquid
The cool end heat exchanger of stirling generator and the hot end heat exchanger that stirling generator is heated using combustion of natural gas, make Si Te
The very big temperature difference of cool end heat exchanger and the hot end heat exchanger generation of woods generator is to make stirling generator generate electricity, generating efficiency
It is greatly improved compared with conventional Power Generation Mode.The low temperature exported from the cool end heat exchanger of stirling generator naturally can be freezer system
Cold, the combustion tail gas discharged from the hot end heat exchanger of stirling generator can heat up to cryogenic natural gas, take full advantage of
Energy reduces the discharge of greenhouse gases and pernicious gas, meets energy-saving and emission-reduction, the requirement of green low-carbon.
In addition, the cold energy of liquefied natural gas in the present embodiment utilizes -165 DEG C~-155 DEG C of system utilization of low-temperature liquefaction day
The cool end heat exchanger of right air cooling stirling generator heats the hot end heat exchanger of stirling generator extremely using combustion of natural gas
600 DEG C or more, the cold and hot both ends of stirling generator are made to generate the very big temperature difference to make stirling generator generate electricity, power generation is imitated
Rate is greatly improved compared with conventional Power Generation Mode.
In addition, the cryogenic natural gas exported from the cool end heat exchanger of stirling generator passes through the cooling second two of First Heat Exchanger
Alcoholic solution can be freezer refrigerating, while increase cryogenic natural gas temperature, take full advantage of the cooling capacity of liquefied natural gas, reduce
Consumption to traditional energy.
Further, low temperature is made by the second heat exchanger from the combustion tail gas that the hot end heat exchanger of stirling generator discharges
Natural gas enters city natural gas pipe network after being warming up to 15 DEG C~25 DEG C, can effectively ensure that natural gas line is not-easy-to-freeze in this way
Frost, convenient for the maintenance of natural gas line.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (8)
1. a kind of cold energy of liquefied natural gas utilize system comprising:
Liquefied natural gas unit has the liquefied natural gas fluid reservoir for storing liquefied natural gas；
Stirling generator has cool end heat exchanger and hot end heat exchanger；
Air supply unit has First Heat Exchanger, the second heat exchanger, the first control valve, the second control valve and burner；And
Freezer unit has First Heat Exchanger, ethylene glycol solution pump, third heat exchanger and freezer,
Wherein, the liquefied natural gas fluid reservoir is connected by pipeline with the stirling generator, the Stirling power generation
Machine is connected by pipeline with the first pipe of the First Heat Exchanger, and the first pipe of the First Heat Exchanger passes through pipe
Road is connected with second heat exchanger；
Ethylene glycol solution pump is connected by the second pipe of the First Heat Exchanger with the First Heat Exchanger, and described the
The second pipe of one heat exchanger is connected by pipeline with the third heat exchanger, the third heat exchanger by pipeline with
The ethylene glycol solution pump is connected, and the third heat exchanger is placed in the freezer；
Second heat exchanger is connected by the first branch with city natural gas pipe network, and first control valve is arranged described
In the first branch, second heat exchanger is connected by second branch with the burner, and the second control valve setting exists
In the second branch, the burner is arranged on the hot end heat exchanger, the burner by exhaust pipe with it is described
Second heat exchanger is connected.
2. cold energy of liquefied natural gas according to claim 1 utilizes system, it is characterised in that:
Wherein, the internal working medium that the stirling generator uses is helium or hydrogen.
3. cold energy of liquefied natural gas according to claim 1 utilizes system, it is characterised in that:
Wherein, the liquified natural gas of the liquefied natural gas unit output uses described interior for the stirling generator
Portion's working medium provides cold source, and the combustion of natural gas heating hot end heat exchanger into the burner provides for the internal working medium
Heat source, the temperature difference between the cool end heat exchanger and the hot end heat exchanger drive the stirling generator to work.
4. cold energy of liquefied natural gas according to claim 3 utilizes system, it is characterised in that:
Wherein, the thermal energy of the combustion of natural gas makes the hot end heat exchanger temperature rise to 600 DEG C or more.
5. cold energy of liquefied natural gas described in any one of -4 utilizes system according to claim 1, it is characterised in that:
Wherein, the temperature of the liquified natural gas is -165 DEG C~-155 DEG C.
6. cold energy of liquefied natural gas described in any one of -4 utilizes system according to claim 1, it is characterised in that:
Wherein, the natural gas temperature of the First Heat Exchanger output is -35 DEG C~-25 DEG C.
7. cold energy of liquefied natural gas described in any one of -4 utilizes system according to claim 1, it is characterised in that:
Wherein, the ethylene glycol solution in the ethylene glycol solution pump passes through the second after First Heat Exchanger progress heat exchange
The temperature of glycol solution is down to -35 DEG C~-25 DEG C by -30 DEG C~-20 DEG C.
8. cold energy of liquefied natural gas described in any one of -4 utilizes system according to claim 1, it is characterised in that:
Wherein, the temperature of the natural gas of the second heat exchanger output is 15 DEG C~25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811473504.XA CN109339973A (en) | 2018-12-04 | 2018-12-04 | A kind of cold energy of liquefied natural gas utilizes system |
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| CN201811473504.XA CN109339973A (en) | 2018-12-04 | 2018-12-04 | A kind of cold energy of liquefied natural gas utilizes system |
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| CN109339973A true CN109339973A (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110107368A (en) * | 2019-06-11 | 2019-08-09 | 赫普科技发展（北京）有限公司 | Steam condensing method, steam and condensate system and electricity generation system |
| CN114151223A (en) * | 2021-12-28 | 2022-03-08 | 成都中科氢阳能源科技有限公司 | Hydrogen fuel gas-electricity hybrid power system based on liquid organic hydrogen storage and Stirling external combustion engine |
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| CN110107368A (en) * | 2019-06-11 | 2019-08-09 | 赫普科技发展（北京）有限公司 | Steam condensing method, steam and condensate system and electricity generation system |
| CN110107368B (en) * | 2019-06-11 | 2024-04-19 | 赫普科技发展（北京）有限公司 | Steam condensing method, steam condensing system and power generation system |
| CN114151223A (en) * | 2021-12-28 | 2022-03-08 | 成都中科氢阳能源科技有限公司 | Hydrogen fuel gas-electricity hybrid power system based on liquid organic hydrogen storage and Stirling external combustion engine |
| CN114151223B (en) * | 2021-12-28 | 2024-04-26 | 成都中科氢阳能源科技有限公司 | Hydrogen fuel gas-electricity hybrid power system based on liquid organic hydrogen storage and Stirling external combustion engine |
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