A vacuum pressure swing adsorption system with stable voltage operation and its process

Abstract

The invention discloses a vacuum pressure swing adsorption system operating under constant pressure and a control process thereof, comprising an adsorption tower, a fan and a vacuum pump. The adsorption towers are divided into three groups, and each group is composed of two adsorption towers. The operation modes of primary pressure drop, secondary pressure drop, vacuum analysis, secondary pressure rise, primary pressure rise, and feeding are cycled. The present invention is a six-column process. Through the optimal control of its own process, secondary pressure equalization is adopted in the adsorption and vacuum analysis process. Compared with the existing 2 to 5 tower process, the fluctuation range is reduced because the number of pressure equalization is one more time. It solves the pressure fluctuation problem of the system itself, and can be used to solve the pressure fluctuation problem of the fan outlet and the pressure fluctuation problem of the vacuum pump, so that the system can run smoothly.

Description

technical field [0001] The invention relates to a vacuum pressure swing adsorption system and its control process with constant voltage operation, in particular to a vacuum pressure swing adsorption system and its control process capable of overcoming the pressure fluctuation of the system itself through process flow control, belonging to the field of pressure swing adsorption. Background technique [0002] Vacuum Pressure Swing Adsorption (VPSA) is a commonly used process for separating or purifying gas mixtures. Its basic principle is to use the selectivity of adsorbents for gas adsorption. When the adsorbent is in contact with the adsorbent, the adsorbent adsorbs and purifies the mixed gas, and discharges the purified gas. After the adsorption is completed, it is decomposed under vacuum, so that the adsorbed components are decomposed from the corresponding adsorbent, and the adsorbent can be regenerated. [0003] The existing VPSA oxygen production system mostly adopts 2 ...

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Problems solved by technology

[0004] The present invention aims to solve the process fluctuation problem of the vacuum pressure swing adsorption system, and provides a vacuum pressure swing adsorption system with stable pressure operation. The system is a six-tower process. Once, so the fluctuation range is reduced, which can be used to solve the problem of pressure fluctuation at the outlet of the fan and the pressure fluctuation of the vacuum pump

[0005] Another object of the present invention is to provide a control process for a vacuum pressure swing adsorption system with stable pressure operation. Through the optimization control of its own process, the secondary pressure equalization is used in the adsorption and vacuum analysis process to solve the pressure fluctuation of the system itself. problem and keep the system running smoothly

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