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A two-staged membrane separation process for hydrogen recovery from refinery gases is introduced.The principle of the gas membrane separation process and the influence of the operation temperatures are analyzed.As the conventional PID controller is difficult to make the operation temperatures steady,a fuzzy self-tuning PID control algorithm is proposed.The application shows that the algorithm is effective,the operation temperatures of both stages can be controlled steadily,and the operation flexibility and adaptability of the hydrogen recovery unit are enhanced with safety.This study lays a foundation to optimize the control of the membrane separation process and thus ensure the membrane performance.
A two-staged membrane separation process for hydrogen principle from the gas membrane separation process and the influence of the operation of the gas are analyzed. As the conventional PID controller is difficult to make the operation steady, a fuzzy self-tuning PID control algorithm is proposed. The application shows that the algorithm is effective, the operation temperatures of both stages can be controlled steadily, and the operation flexibility and adaptability of the hydrogen recovery unit are enhanced with safety. This study lays a foundation to optimize the control of the membrane separation process and thus ensure the membrane performance.