Method and device for liquefying natural gas via refrigeration of single mixed refrigerant

A technology of liquefied natural gas and mixed working fluid, which is applied in refrigeration and liquefaction, liquefaction, refrigerator and other directions, can solve the problems of high energy consumption of the device and poor adaptability to variable load operation, so as to reduce power consumption and increase equipment investment. , the effect of reducing the degree of influence
CN101967413AInactive Publication Date: 2011-02-09HANGZHOU FORTUNE CRYOGENIC EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HANGZHOU FORTUNE CRYOGENIC EQUIP CO LTD
Publication Date
2011-02-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a device for liquefying natural gas via the refrigeration of a single mixed refrigerant, comprising a motor-driven three-section mixed refrigerant compressor, three coolers, five gas-liquid separators, two liquid pumps, three throttling devices, three fin-type heat exchangers and one LNG (Liquefied Natural Gas) storage tank. According the device, the mixed refrigerant is compressed and separated step by step by using the three-section mixed refrigeration compressor, and the liquid separated in each step is pressurized by the liquid pumps and then directly enters the heat exchanger group for heat exchange, thereby reducing the power consumption of gas compression; the three-stage refrigeration cycle is adopted to ensure that the heat exchange curves of the cold fluid and the hot fluid in the whole heat exchange process are better matched, therefore, the flow of the mixed refrigerant is effectively decreased and the energy consumption of the device is finally reduced.
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Description

technical field

[0001] The invention belongs to the liquefaction production of other hydrocarbon-rich gases, and in particular relates to a method and device for liquefying natural gas by using single mixed working medium refrigeration. technical background

[0002] Due to its environmental protection, natural gas has become the best substance to replace other fuels, and its application fields have gradually expanded to power generation, automobile gas, industrial gas, urban residential gas, chemical gas, etc.

[0003] With the growth of natural gas consumption, as one of the most efficient forms of supply and use of natural gas, the trade volume of liquefied natural gas has become one of the fastest growing areas of the energy market. The continuous development of the liquefied natural gas industry has put forward higher requirements for natural gas liquefaction methods and devices in terms of energy consumption, investment and efficiency.

[0004] At present, relatively m...

Claims

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