The technology of Helium purification recycle plant

The common method of helium purification recycle plant is cryogenic and condensation. In addition, a lot of new technologies in the cryogenic field are also adopted in the plant development process, including vibration reduction of high pressure helium compressor, special welding technology of cryogenic and high-pressure copper pipelines, and cryogenic and high pressure flexible sealing technology, etc., to optimize products. On this basis, making a breakthrough in the purification technology through membrane separation method. A low-purity helium with a purity of 10% or more was purified to more than 99.5% and the recovery rate of system purification was more than 60%.
Features of technology
A new type of recycling plant for waste helium purification manufactured by Chinese enterprises monitoring the purity, measurement, pressure and temperature of helium in the system by using industrial PLC, which realizes the full automation monitoring of the compressor, the drying and purifying device, the purifier and the control valves, and completes the automatic operation of the plant. Fully intelligent, safe and reliable automatic control technology is also a key technology and feature of the project.
Helium purification is an international frontier research field. Methods used include cryogenic condensation, membrane separation, pressure swing adsorption and chemical adsorption. Chinese enterprises on the basis of the research in low temperature, the breakthrough of cryogenic condensation separation research technical bottlenecks, develop industrial helium purification of membrane separation technology and equipment, with international giants to compete in the helium purification technology and equipment, and actively research of composite helium membrane separation and cryogenic separation method, combined with high efficiency and cryogenic separation membrane separation and recovery of the characteristics of high purity helium by membrane separation technology in thick purifying first, and then uses the cryogenic separation technology in fine purification, satisfy multiple needs industrial energy saving and high purity.

(source:https://www.airseparation-plant.cn/the-technology-of-helium-purification-recycle-plant/)