Argon purification method and device based on serial pressure swing adsorption separation technology

• Main Authors: FAN HAOTING, FAN HAO, LIU ANLIAN, JIA JILAI, HAN DONG, YAN JUN, SHEN GUANGHAO, GU XIUZHU, SHEN XIAODONG, CHEN YIXUAN, WANG JUNXIN, WANG CHEN, SHI HONGYI, SONG SHAO, XIE DONGHONG
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention belongs to the technical field of gas separation, and particularly relates to an argon purification method and device based on a series pressure swing adsorption separation technology. A pressure swing adsorption technology of an oxygen adsorbent with an equilibrium adsorption mechanism is adopted to remove oxygen, a pressure swing adsorption technology of a nitrogen adsorbent with an equilibrium adsorption mechanism is adopted to remove nitrogen, and the oxygen adsorbent and the nitrogen adsorbent are coupled in series, that is, the purification process comprises a preceding-stage oxygen removal process and a secondary nitrogen removal process; in the organic coupling process of the two pressure swing adsorption, a gas recovery loop is designed between the symmetrically operating adsorption bed layers, so that the argon loss is reduced to the maximum extent, and the recovery rate is improved; moreover, one part of waste gas generated in the oxygen removal adsorption separation process flows bac