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Low-temperature gas liquefaction device

A low-temperature gas and liquefaction device technology, applied in liquefaction, refrigeration, liquefaction, solidification, etc., can solve problems such as insufficient utilization of cooling capacity, large heat transfer temperature difference, and difficult production of cylinder heat exchangers, etc., to achieve cooling capacity utilization efficiency High, high liquefaction rate, the effect of avoiding heat loss

Pending Publication Date: 2022-07-12
CSIC PRIDE (NANJING) CRYOGENIC TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The purpose of the invention is to propose a liquefaction efficiency solution for the problems of the traditional low-temperature gas liquefier device, such as the difficulty in making the cylinder heat exchanger, insufficient utilization of cooling capacity, and large heat exchange temperature difference with the cold head or cylinder. High, easy-to-manufacture cryogenic gas liquefaction device

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] like figure 1 In the shown low-temperature gas liquefaction device, the refrigerator 6 is a two-stage refrigerator, which is integrated in the vacuum enclosure 7 as a cold source. A cold shield 11 is arranged inside the vacuum cover 7, and the cold shield 11 is connected to the first-stage cold head 6-2 for cooling, so that the temperature of the cold shield 11 is maintained between 20-100K. The bottom of the secondary cylinder 6-3 has holes and is connected with the low temperature throttle device 8. In the liquefaction stage, after the low-temperature gas at the bottom of the secondary cylinder 6-3 is throttled by the low-temperature throttling device 8, the low-temperature liquid is obtained, and is output to the low-temperature liquid storage container through the infusion pipe 9. The vacuum cannula 10 is wrapped. The consumption of the liquefaction process is supplemented by the high-purity gas provided externally, and the high-purity gas is supplemented by the s...

Embodiment 2

[0022] like figure 2 As shown, the second embodiment is basically the same as the first embodiment, the difference is that a hole is opened in the low temperature part of the secondary cylinder 6-3 near the bottom, and a low temperature throttle device 8 is connected.

Embodiment 3

[0024] like image 3 As shown, the third embodiment is basically the same as the first embodiment, except that the refrigerator 6 is a single-stage refrigerator, and the bottom of the first-stage cylinder 6-1 has a hole and is connected to the low-temperature throttling device 8. At the same time, no cold shield 11 is provided in the vacuum hood 7 .

[0025] When the above embodiments are specifically implemented, the refrigerator may be a GM refrigerator, a pulse tube refrigerator, or a Stirling refrigerator.

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Abstract

The invention discloses a low-temperature gas liquefying device which comprises a gas supplementing system and a refrigerating machine integrated in a vacuum cover, the refrigerating machine is a multi-stage refrigerating machine, and a low-temperature throttling device is arranged in the vacuum cover; a hole is formed in the bottom of a last-stage air cylinder of the refrigerating machine or a low-temperature part close to the bottom and connected with a low-temperature throttling device, the low-temperature throttling device is used for throttling low-temperature gas in the air cylinder into low-temperature liquid or gas-liquid two-phase fluid, and the low-temperature liquid or the gas-liquid two-phase fluid is discharged through a liquid conveying pipe; a vacuum sleeve is arranged at the bottom of the vacuum cover and wraps the infusion tube. The air supply system comprises a compressor, an outlet of the compressor is connected with the refrigerator through an air delivery pipe, and an inlet of the compressor is connected with the refrigerator through an air return pipe; an inlet or an outlet of the compressor is connected with an air inlet pipeline; a flow control valve is arranged on the air inlet pipeline; the gas supplementing system is used for supplementing liquefied gas into the refrigerating machine. The device is high in cold energy utilization efficiency, high in liquefaction efficiency and easy to produce and manufacture.

Description

technical field [0001] The invention belongs to low-temperature refrigeration equipment, in particular to a low-temperature gas liquefaction device. Background technique [0002] Many low-temperature experiments (such as comprehensive physical property measurement of materials, condensed matter physics experiments, research in the field of chemistry, research on superconducting magnets, nuclear magnetic resonance, etc.) carried out by universities and research institutes in China all require immersion in liquid helium, liquid hydrogen or liquid neon. to provide the required low temperature test environment. Under normal pressure, the saturation temperatures of liquid helium, liquid hydrogen, and liquid neon are -269°C, -252.8°C, and -246°C, respectively, all of which are not easily liquefied gases. The traditional rare gas liquefaction device uses a small cryogenic refrigerator as the cold source, but the small cryogenic refrigerator can provide limited cooling capacity at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02
CPCF25J1/0202F25J1/0005F25J1/0007F25J2270/908F25J1/004F25J1/0227F25J1/001F25J2215/32
Inventor 陈杰胡咸军许红张诚段罗斌
Owner CSIC PRIDE (NANJING) CRYOGENIC TECHNOLOGY CO LTD
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