Method and device for preparing high-purity oxygen based on coupling separation technology

• Main Authors: CHEN YIXUAN, JIA JILAI, LUO ERPING, LI XIN, WANG CHEN, LUO PENG, SHEN GUANGHAO, GU XIUZHU, XIE DONGHONG
• Format: Patent
• Language: Chinese; English
• Published: 15.06.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention belongs to the technical field of gas separation, and particularly relates to a method and device for preparing high-purity oxygen based on a coupling separation technology. According to the invention, a pressure swing adsorption drying technology and a zeolite membrane separation technology are coupled, i.e., an oxygen production process comprises a preceding-stage pressure swing adsorption drying process and a later-stage zeolite membrane separation process. According to the pressure swing adsorption drying technology, moisture in air is removed through an adsorption tower, and the air is compressed. According to the zeolite membrane separation technology, a zeolite membrane separator is adopted for oxygen and nitrogen separation and oxygen and argon separation, nitrogen and argon in the dry compressed air from an adsorption drying bed layer with moisture removed are removed, and therefore high-purity oxygen with the purity being 90% or even 99.5% or above is obtained. One part of waste gas ge