Device for recycling cold energy of low-temperature nitrogen and using method of device

A cold energy recovery and low temperature technology, which is applied in refrigeration and liquefaction, cold treatment separation, solidification, etc., can solve the problems that cannot be popularized and applied on a large scale, and achieve the effect of reducing cost and site size, wide load operation range, and reducing energy consumption
CN113758148APending Publication Date: 2021-12-07HANGZHOU HANGYANG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HANGZHOU HANGYANG
Publication Date
2021-12-07

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Abstract

The invention discloses a device for recycling cold energy of low-temperature nitrogen and a using method of the device. The device comprises a compression system, an expansion refrigeration system and a heat exchange system which communicate through pipelines and valves, the compression system is composed of a raw material compressor suitable for low-temperature gas and a circulating compressor suitable for low-temperature gas. The compressor is used for compressing low-temperature nitrogen. The expansion refrigeration system is composed of one or more turbo expanders and provides a cold source for the device. The heat exchange system is composed of one or more sets of heat exchangers and used for heat exchange of nitrogen liquefaction. The three systems are highly coupled, can adapt to the raw material low-temperature nitrogen under different temperature conditions, are wide in application range, and can greatly improve the cold energy recovery efficiency of the low-temperature nitrogen and reduce the energy consumption of liquid nitrogen products.
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Description

technical field

[0001] The present invention relates to a device and method for recovering the cooling capacity of low-temperature nitrogen, more specifically, recovering the cooling capacity of low-temperature nitrogen through efficient coupling of a low-temperature raw material compressor, a circulating compressor, an expansion refrigeration system and a heat exchange system Energy-saving device and method for producing liquid nitrogen. Background technique

[0002] Nitrogen accounts for about 78% of atmospheric components. It is inert in nature and chemically inert. It is an industrial gas with a wide range of applications. It is widely used in chemical production, equipment manufacturing, food preservation, laser cutting, and low-temperature simulation in aerospace engineering. field of testing. At present, some industries often have excess nitrogen release, especially in the space environment low temperature simulation test devices used in a series of major aerospace p...

Claims

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