CN208635428U - A kind of coolant circulating system using cold energy of liquefied natural gas - Google Patents
A kind of coolant circulating system using cold energy of liquefied natural gas Download PDFInfo
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- CN208635428U CN208635428U CN201821107392.1U CN201821107392U CN208635428U CN 208635428 U CN208635428 U CN 208635428U CN 201821107392 U CN201821107392 U CN 201821107392U CN 208635428 U CN208635428 U CN 208635428U
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Abstract
The utility model discloses a kind of coolant circulating system using cold energy of liquefied natural gas, which includes LNG tank, cooling evaporator, heat exchanger group, natural gas compressor, cold medium compressor, condenser and rectifying column；The outlet of LNG tank and heat exchanger group is connect with two heat exchange entrances of cooling evaporator respectively, two heat exchange outlets of cooling evaporator are separately connected the entrance of heat exchanger group and condenser, install throttle valve on the pipeline between cooling evaporator and condenser；Heat exchanger group is sequentially connected cold medium compressor, air heat exchanger and condenser；The heat exchange outlet connection natural gas compressor of heat exchanger group, condenser are located at the surface of rectifying column；The cooling cold energy of natural gas is passed out in space division rectifying column and is formed circulation by the refrigerant in pipeline, and cold energy is passed to the air of external access in air heat exchanger, air is pre-chilled by refrigerant.The cold energy that the utility model can make full use of liquefied natural gas completes the pre-cooling to air, obtains good economic benefits.
Description
Technical field
The utility model relates to a kind of coolant circulating systems, and in particular to a kind of to be followed using the refrigerant of cold energy of liquefied natural gas
Loop system.
Background technique
Coolant circulating system is the important component of air-seperation system, and air-seperation system needs a large amount of low temperature cold
Can, conventional liq air separation generallys use supercharging air circulation or nitrogen supercharging circulation, is reconfigured two high temperature, low temperature pressurization
Turbine expander refrigeration provides institute's chilling requirement for air separation unit.Therefore, the low temperature environment of regular air separation system is completely by electricity
The mechanical refrigeration of power drive generates, its general power cost accounts for 70% of production cost or so, while also to consume a large amount of
Cooling water.
Air-separating technology process using cold energy of liquefied natural gas is that cooling capacity is passed to air separation system by refrigerant
The air cooling unit and air rectification cell of system cancel the circulating nitrogen gas swell refrigeration unit in traditional space division technique.With biography
System air-seperation system is compared, and the compression energy consumption for cooling of air separation unit can be greatly lowered using the cooling capacity of liquefied natural gas,
Substantially cooling water is not needed, while liquefied natural gas gasifying expense can also be reduced.Cold energy of liquefied natural gas space division technique energy
The cooling capacity of LNG cold position is enough made full use of, can be high with energy producing level, energy-saving advantage is significant.
Currently, it is conventional using cold energy of liquefied natural gas space division technique technology for cold energy of liquefied natural gas utilization rate less than
40%, just with shallow cold part, being worth bigger deep cooling part, there is no recycle.
Utility model content
In view of this, the present invention provides a kind of coolant circulating system using cold energy of liquefied natural gas, Neng Gouchong
Divide the pre-cooling and separation using the cold energy completion of liquefied natural gas to air, realizes the recycling to liquefied natural gas deep cooling part
It utilizes.
A kind of coolant circulating system using cold energy of liquefied natural gas, the system include LNG tank, cooling steaming
Send out device, heat exchanger group, natural gas compressor, cold medium compressor, condenser and rectifying column.
The outlet of LNG tank and heat exchanger group is connect with two heat exchange entrances of cooling evaporator respectively, cooling
Two heat exchange outlets of evaporator are separately connected the entrance of heat exchanger group and condenser, the pipe between cooling evaporator and condenser
Road installation throttle valve；Heat exchanger group is sequentially connected cold medium compressor, air heat exchanger and condenser；The heat exchange of heat exchanger group goes out
Mouth connection natural gas compressor, condenser are located at the surface of rectifying column；Refrigerant in the pipeline is by the gas of liquefied natural gas
Change cold energy and be transmitted in space division rectifying column and formed circulation, cold energy is passed to the sky of external access by refrigerant in air heat exchanger
Air is pre-chilled in gas.
Further, the heat exchanger group after two completely identical in structure heat exchanger series connection by forming.
The utility model has the advantages that
The utility model reasonably utilizes refrigerant to absorb the cold energy of liquefied natural gas, and refrigerant is again by the cold energy of liquefied natural gas
It is transmitted in space division rectifying column.Cold energy is passed to air by refrigerant, and air is pre-chilled.By by heat exchanger and compressor
Reasonable distribution arrangement fully can realize the circulation of refrigerant using the cold energy of liquefied natural gas and complete the pre-cooling to air.
Detailed description of the invention
Fig. 1 is the system theory of constitution schematic diagram of the utility model.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
As shown in Fig. 1, the utility model provides a kind of coolant circulating system for recycling cold energy of liquefied natural gas, this is
System includes LNG tank 1, cooling evaporator 3, First Heat Exchanger 20, the second heat exchanger 21, natural gas compressor 22, cold
Matchmaker's compressor 17, third heat exchanger 16, condenser 10 and rectifying column 11；
Wherein third heat exchanger 16 is the air heat exchanger for realizing air heat-exchange.
LNG tank 1 and First Heat Exchanger 20 are connect with two heat exchange entrances of cooling evaporator 3 respectively, cooling
Two heat exchange outlet of evaporator 3 is separately connected First Heat Exchanger 20 and condenser 10, between cooling evaporator 3 and condenser 10
Pipeline on install throttle valve 8；Cold medium compressor 17, third are sequentially connected after First Heat Exchanger 20 and the series connection of the second heat exchanger 21
Heat exchanger 16 and condenser 10；The heat exchange outlet connection natural gas compressor 22 of second heat exchanger 21, condenser 10 are located at rectifying
The surface of tower 11.
Liquefied natural gas 2 (- 148 DEG C, 300kpa) is output and then enter in cooling evaporator 3 from LNG tank 1
It is evaporated, exchanges heat with the gaseous coolant 19 entered in cooling evaporator 3, gaseous coolant is cooled to liquid, and liquefaction is natural
Gas 2 becomes gaseous natural gas 4 after passing through evaporation and heat-exchange；Gaseous natural gas 4 sequentially enters First Heat Exchanger 20 and the second heat exchanger
21 continue to exchange heat with through the compressed refrigerant 18 of cold medium compressor 17, and gaseous coolant is cooled to saturation gaseous coolant 19,
Natural gas 5 after the heat exchange of the second heat exchanger 21 is compressed to setting pressure by natural gas compressor 22, compressed natural
Gas 6 is sent to gas distributing system for users to use.
Gaseous coolant 18 is cold by being cooled to liquid after the second heat exchanger 21, First Heat Exchanger 20 and cooling evaporator 3
Matchmaker 7, and liquid refrigerants 7 is flowed into condenser 10, and temperature, pressure reduce after liquid refrigerants 7 is throttled by throttle valve 8, throttle
Refrigerant 9 afterwards has partial gasification.Refrigerant 9 enters in the condenser 10 of 11 tower top of rectifying column, as the cold source in condenser 10, is
Refrigerant 12 after the offer cooling capacity of rectifying column 11 all becomes gaseous state.Gaseous coolant 12 is entering 16 pairs of heat exchanger by purified treatment
Air 14 afterwards is pre-chilled, and the air 15 after pre-cooling enters rectifying column as rectifying column raw material, with the refrigerant after air heat-exchange
13 are pressurized by cold medium compressor 17, and the refrigerant 18 after heating is continued cycling through into the second heat exchanger 21 and the first heat exchange
Device 20 exchanges heat with natural gas.
In conclusion the above is only the preferred embodiments of the present utility model only, it is not intended to limit the utility model
Protection scope.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap
Containing being within the protection scope of the utility model.
Claims (2)
1. a kind of coolant circulating system using cold energy of liquefied natural gas, which is characterized in that the system includes liquefied natural gas storage
Tank, cooling evaporator, heat exchanger group, natural gas compressor, cold medium compressor, condenser and rectifying column；
The outlet of LNG tank and heat exchanger group is connect with two heat exchange entrances of cooling evaporator respectively, cooling evaporation
Two of device heat exchange outlets are separately connected the entrance of heat exchanger group and condenser, on the pipeline between cooling evaporator and condenser
Throttle valve is installed；Heat exchanger group is sequentially connected cold medium compressor, air heat exchanger and condenser；The heat exchange of heat exchanger group, which exports, to be connected
Natural gas compressor is connect, condenser is located at the surface of rectifying column；Refrigerant in the pipeline is cold by the gasification of liquefied natural gas
It can be transmitted in space division rectifying column and be formed circulation, cold energy is passed to the air of external access by refrigerant in air heat exchanger,
Air is pre-chilled.
2. utilizing the coolant circulating system of cold energy of liquefied natural gas as described in claim 1, which is characterized in that the heat exchanger
Group after two completely identical in structure heat exchanger series connection by forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107392.1U CN208635428U (en) | 2018-07-12 | 2018-07-12 | A kind of coolant circulating system using cold energy of liquefied natural gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821107392.1U CN208635428U (en) | 2018-07-12 | 2018-07-12 | A kind of coolant circulating system using cold energy of liquefied natural gas |
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| CN208635428U true CN208635428U (en) | 2019-03-22 |
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| CN201821107392.1U Active CN208635428U (en) | 2018-07-12 | 2018-07-12 | A kind of coolant circulating system using cold energy of liquefied natural gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028759A (en) * | 2018-07-12 | 2018-12-18 | 北京拓首能源科技股份有限公司 | A kind of coolant circulating system using cold energy of liquefied natural gas |
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2018
- 2018-07-12 CN CN201821107392.1U patent/CN208635428U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028759A (en) * | 2018-07-12 | 2018-12-18 | 北京拓首能源科技股份有限公司 | A kind of coolant circulating system using cold energy of liquefied natural gas |
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