High-purity gas preparation method based on pressure swing adsorption

• Main Authors: CHEN ZUYUE, LI YANG, JING FANGLI, SHEN JUN, HUANG XIANBO, LUO SHIZHONG
• Format: Patent
• Language: Chinese; English
• Published: 24.09.2021
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention relates to the field of gas purification, in particular to a high-purity gas preparation method based on pressure swing adsorption. According to the method, a plurality of adsorption towers are connected in series on an adsorption path on the basis of keeping the regeneration pressure equalization of the adsorption towers, so that the purity of the product gas is effectively improved. During regeneration, after the regenerated adsorption towers are connected into the adsorption path in series, the first-stage adsorption tower of the original adsorption path is disconnected, and regeneration is carried out. The process can reduce the influence on the purity of the product gas when the adsorption tower is replaced; and meanwhile, the adsorption tower still keeps the advantages of original pressure-equalizing operation, can maintain relatively large adsorption pressure, reduces pressure drop, reduces airflow fluctuation, and effectively improves the gas yield. The application can be used for purify