CN209324537U - 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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- CN209324537U CN209324537U CN201822022163.6U CN201822022163U CN209324537U CN 209324537 U CN209324537 U CN 209324537U CN 201822022163 U CN201822022163 U CN 201822022163U CN 209324537 U CN209324537 U CN 209324537U
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- heat exchanger
- natural gas
- liquefied natural
- cold energy
- stirling generator
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Abstract
The utility model provides a kind of cold energy of liquefied natural gas using 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, the generating efficiency of the utility model 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 utility model 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.
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.
Utility model content
The utility model 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 is sharp
Heat exchanger and stirling generator are effectively combined using the cryogenic cold energy of liquefied natural gas with system, while can be mentioned for freezer
For low temperature environment, energy-saving, environment-friendly and high-efficiency, utility value with higher.
The utility model provides a kind of cold energy of liquefied natural gas using system, has liquefied natural gas unit, the liquefaction
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.
In cold energy of liquefied natural gas provided by the utility model using in system, Si Te can also have the following features:
The internal working medium that woods generator uses is helium or hydrogen.
In cold energy of liquefied natural gas provided by the utility model using in system, liquefaction can also have the following features:
The liquefied natural gas of natural gas unit output provides cold source for the internal working medium that stirling generator uses, into the day of burner
Right gas 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
Stirling generator work.
It is natural using can also have the following features: in system in cold energy of liquefied natural gas provided by the utility model
The thermal energy of gas burning makes hot end heat exchanger temperature rise to 600 DEG C or more.
In cold energy of liquefied natural gas provided by the utility model using in system, liquefaction can also have the following features:
The temperature of natural gas is -165 DEG C~-155 DEG C.
In cold energy of liquefied natural gas provided by the utility model using in system, first can also have the following features:
The natural gas temperature of heat exchanger output is -35 DEG C~-25 DEG C.
In cold energy of liquefied natural gas provided by the utility model using in system, second two can also have the following features:
Alcoholic solution pump in ethylene glycol solution by First Heat Exchanger progress heat exchange after ethylene glycol solution temperature by -30 DEG C~-
20 DEG C are down to -35 DEG C~-25 DEG C.
In cold energy of liquefied natural gas provided by the utility model using in system, second can also have the following features:
The temperature of the natural gas of heat exchanger output is 15 DEG C~25 DEG C.
The action and effect of utility model
The cold energy of liquefied natural gas according to involved in the utility model utilizes system, due to being naturally gas-cooled using low-temperature liquefaction
But the cool end heat exchanger of stirling generator and the hot end heat exchanger using combustion of natural gas heating stirling generator, make Si Te
The cold and hot both ends of woods generator generate the very big temperature difference to make stirling generator generate electricity, and generating efficiency is big compared with conventional Power Generation Mode
Width improves.The low temperature exported from the cool end heat exchanger of stirling generator can be naturally freezer refrigerating, from stirling generator
Hot end heat exchanger discharge combustion tail gas can heat up to cryogenic natural gas, take full advantage of energy, reduce greenhouse gas
The discharge of body and 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 utility model embodiment one using system.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, with
Lower embodiment combination attached drawing is specifically addressed the cold energy of liquefied natural gas of the utility model using system.
<embodiment one>
Fig. 1 is structural schematic diagram of the cold energy of liquefied natural gas in the utility model embodiment 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
Heat exchanger 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 liquefaction
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
The cool end heat exchanger of natural air cooling stirling generator utilizes the hot end heat exchanger of combustion of natural gas heating stirling generator
To 600 DEG C or more, so that the cold and hot both ends of stirling generator is generated the very big temperature difference to make stirling generator generate electricity, generate electricity
Efficiency 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 the preferred case of the utility model, is not intended to limit the protection scope of the utility model.
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 2 utilizes system, it is characterised in that:
Wherein, the liquefied 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 liquefied 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822022163.6U CN209324537U (en) | 2018-12-04 | 2018-12-04 | A kind of cold energy of liquefied natural gas utilizes system |
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| CN201822022163.6U CN209324537U (en) | 2018-12-04 | 2018-12-04 | A kind of cold energy of liquefied natural gas utilizes system |
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| CN209324537U true CN209324537U (en) | 2019-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109339973A (en) * | 2018-12-04 | 2019-02-15 | 上海理工大学 | A kind of cold energy of liquefied natural gas utilizes system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109339973A (en) * | 2018-12-04 | 2019-02-15 | 上海理工大学 | A kind of cold energy of liquefied natural gas utilizes system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190830 Termination date: 20201204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |