膜分离过程中原料气流量的控制方法

介绍了气体膜分离原理;提出了理想膜过程的新概念;归纳了气体膜分离装置的运行特点;比较分析了气体膜分离过程中原料气流量控制的各种方法;提出通过在尾气侧安装调节阀来定量调节原料气流量的控制方法;该方法成功应用于金陵石化加氢裂化低分气中提取高浓氢的工艺中,验证了这种控制策略的正确性和有效性;整体的控制方案又进一步提高了膜分离装置的操作柔性及适应能力;该方法可同时保证渗透气快气浓度及回收率的性能指标,适用于所有气体膜分离过程中对处理气量的自动控制.

Control Method of Feed Gas Flux in Membrane Separation Process

The principle of the gas membrane separation process is described.A new concept of ideal membrane process is presented.The operation characteristics of gas membrane separation unit are induced.Various control methods of permeate gas flux in the gas membrane separation process are compared and analyzed.One control method of the feed gas flux is applied: the feed gas flux can be auto-controlled through the control valve installed in the residue gas stream.The correctness and the effectiveness of the control philosophy are verified successfully in the process of extracting the high purity hydrogen from low-pressure segregator gas of hydrocracking in Jinling Petrochemical.The operation flexibility and adaptability of the hydrogen recovery unit are enhanced by further overall design.The concentration and recovery rate for the quick gas of permeate gas stream can be ensured meanwhile.The method is the same with all control for feed gas flux.