Helium low-temperature purification method and device and helium refrigeration cycle system

A purification method and technology of purification device, which are applied in the field of helium low temperature purification and helium refrigeration cycle system, can solve the problems of low temperature system performance degradation, inability to meet application occasions, small size, etc.

Pending Publication Date: 2021-06-04
WUHAN IRON & STEEL GRP GAS CO LTD
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The helium required by the helium refrigeration cycle system at the initial stage of operation is all from the external helium raw material gas, and still contains traces of neon, oxygen, nitrogen, and water with impurity concentrations of PPM (parts per million concentration). The flat expander is small in size, only the size of a bottle cap, and is very precise. Impurities freezing in an ultra-low tempe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Helium low-temperature purification method and device and helium refrigeration cycle system
  • Helium low-temperature purification method and device and helium refrigeration cycle system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]An embodiment of the present invention provides a low-temperature purification method for helium gas. The method performs low-temperature purification of helium gas through a pipeline system, and sequentially connects a precooling heat exchanger, a low-temperature heat exchanger, and a purifier installed in the pipeline system. That is to say, the low-temperature purification method for helium in this embodiment can be implemented on any equipment in the prior art that is equipped with a pre-cooling heat exchanger, a low-temperature heat exchanger, and a purifier, and the specific structure of the equipment is not included in the present invention. Do limit.

[0033] see figure 1 , the low-temperature purification method for helium comprises the steps of:

[0034] (1) Preparation before purification: close the inlet valve and outlet valve in the pipeline system, keep the pipeline inside the pipeline system unblocked, feed helium raw material gas into the pipeline system...

Embodiment 2

[0045] Based on the same inventive concept, this embodiment provides a preferred device for implementing the helium low-temperature purification method of the above-mentioned embodiment 1, see figure 2 , the helium low-temperature purification device includes a pipeline system 9, a precooling heat exchanger 2, a low-temperature heat exchanger 3, a purifier 4, a Dewar tank 1, a vacuum pump 5 and a helium cylinder group 6, and the above-mentioned pre-heating is carried out through the pipeline system 9. The cold heat exchanger 2, the cryogenic heat exchanger 3, the purifier 4, the Dewar tank 1, the vacuum pump 5 and the helium cylinder group 6 are connected as a whole. In order to improve the overall portability of the helium low-temperature purification device, as a preferred embodiment, the entire helium low-temperature purification device can be integrated on a trolley, which is flexible and convenient to move.

[0046] The specific piping structure of the pipeline system 9 ...

Embodiment 3

[0053] This embodiment provides a helium refrigeration cycle system used in a neon-helium extraction device, the helium gas used in the helium refrigeration cycle system is the helium gas with a purity of 6N produced by the low-temperature purification method for helium gas in the above-mentioned embodiment 1 , or the helium gas with a purity of 6N produced by the helium cryogenic purification device of the above-mentioned embodiment 2. 6N helium is sent into the helium refrigeration cycle system to participate in compression, expansion, and heat exchange, and provides cooling capacity for the neon and helium extraction device. Since the present invention does not improve other structures of the helium refrigeration cycle system and the neon-helium fine extraction device, other unspecified structures of the helium refrigeration cycle system and the neon-helium fine extraction device can refer to the prior art, and the specific content is here Explanation is not done.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a helium low-temperature purification method and device and a helium refrigeration cycle system. The method comprises the steps of preparation before purification; pre-cooling; and purifying. The device comprises a pipeline system, a precooling heat exchanger, a low-temperature heat exchanger, a purifier, a Dewar tank, a vacuum pump and a helium tank group; a purification pipeline and a vacuum pipeline are arranged in the pipeline system, inlet stop valves are arranged on inlet pipe sections of the purification pipeline and the vacuum pipeline, outlets of the purification pipeline and the vacuum pipeline are converged on an outlet pipeline of the pipeline system, and an outlet stop valve is arranged on the outlet pipeline; the pre-cooling heat exchanger, the low-temperature heat exchanger and the purifier are sequentially in communication and mounted on the purification pipeline and are all packaged in the Dewar tank; the vacuum pump communicates with an inlet of the vacuum pipeline; and the helium tank group is in communication with an inlet of the purification pipeline. According to the helium low-temperature purification method and device provided by the invention, high-purity helium with the purity of 6N can be produced, and application occasions with high-purity requirements, such as the helium refrigeration cycle system and the like, can be met.

Description

technical field [0001] The application belongs to the technical field of chemical gas separation, and in particular relates to a helium low-temperature purification method and device, and a helium refrigeration cycle system. Background technique [0002] The nitrogen removal and neon-helium separation processes in the neon-helium extraction device occur at low temperature, and the cooling capacity is provided by the helium refrigeration cycle system, and the final cooling temperature needs to reach 24K. The helium required by the helium refrigeration cycle system at the initial stage of operation is all from the external helium raw material gas, which still contains traces of neon, oxygen, nitrogen, and water with impurity concentrations of PPM (parts per million concentration). The flat expander is small in size, only the size of a bottle cap, and is very precise. Impurities freezing in an ultra-low temperature environment will damage the blades of the expander, resulting i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F25J3/08F25B41/40
CPCF25J3/08F25J2215/30
Inventor 杨洁陈独强齐利兵高波袁涛南静
Owner WUHAN IRON & STEEL GRP GAS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap