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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

Pending Publication Date: 2021-12-07
HANGZHOU HANGYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many theoretical studies on the cold storage device at present, the feasibility of engineering application and the reliability of the process flow have yet to be verified, and it cannot be widely used at present.

Method used

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

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Experimental program
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Embodiment

[0045] exist figure 1 In the embodiment, the raw material is clean and dry and the nitrogen 00 with a temperature of about 110K is compressed to about 0.52MPaA by the raw material low-temperature compressor NTC1 connected in series with two impellers, and the temperature of the nitrogen 01 is raised to about 219K, and then directly enters the TC2 of the circulating compressor NTC2 The -1 stage is compressed to about 1.1MPaA, the outlet temperature of the compressed thirty-first gas 31 is about 313K, and then directly enters the TC2-2 stage of the circulating compressor NTC2 through the A channel and is compressed to about 3.0MPaA, and the temperature rises To around 388K. The compressed thirty-second gas 32 is subcooled to 313K by the aftercooler WC1 and the third gas 03 is divided into two streams: the fourth gas 04 and the fifth gas 05 . The fourth gas 04 enters the heat exchanger E1 and cools down in the heat exchanger E1. After cooling to about 290K, it is extracted from ...

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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.

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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Application Information

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IPC IPC(8): F25J1/02
CPCF25J1/0015F25J1/0235F25J1/0281F25J1/0035F25J1/0037F25J1/004F25J1/0045F25J1/0202F25J2245/90F25J2270/06F25J1/0288F25J2290/34F25J1/0292F25J1/0296F25J1/0247
Inventor 韩一松谭芳蒋云云池雪林彭旭东艾绍华姚蕾李玲劳利建徐申骏
Owner HANGZHOU HANGYANG
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