Membrane-method helium purifying device system and process

Abstract

The invention relates to a membrane-method helium purifying device system and process. The membrane-method helium purifying process is characterized by comprising the following steps: preprocessing collected mixed helium through a first preprocessor, and separating the preprocessed mixed helium reaching the set membrane inlet gas requirement through a first hollow fibrous membrane; recycling or exhausting impermeable gas separated by the first hollow fibrous membrane, and filling the separated permeable gas into a second preprocessor; preprocessing the permeable gas of the first hollow fibrous membrane through the second preprocessor, and continuously separating the permeable gas through a second hollow fibrous membrane; circulating the impermeable gas separated by the second hollow fibrous membrane to the first preprocessor, wherein the separated permeable gas is the product helium. According to the membrane-method purifying process, the low-concentration helium is recycled, the equipment is small in size, the process is simple, and the operation is convenient.

Description

technical field [0001] The invention relates to a membrane method helium purification device system and process, in particular to a membrane method purification device system for helium recovery and reuse, and a purification process using the system. Background technique [0002] Helium is an indispensable rare strategic material for the development of industry, chemical industry, scientific research teaching and high-tech industries. It is widely used in scientific research, aerospace, refrigeration, medical treatment, optical fiber, leak detection, superconducting experiments, metal manufacturing, deep-sea diving, High-precision welding production and other fields. The distribution of helium reserves in the world is very uneven. There are rich helium resources in each part of the world, but my country's helium resources are seriously scarce. Only Sichuan has a small amount of helium. For a long time, my country's industrial production and scientific experiments Helium (inc...

AI Technical Summary

Problems solved by technology

The advantage of cryogenics is that high-concentration high-purity helium can be obtained, but the disadvantages are large equipment investment, high energy consumption, and long start-up time; the disadvantages of pressure swing adsorption are large equipment volume, high noise, and slow start-up time, etc.

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