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1. 发明专利

JPS6238219A METHOD FOR PURIFYING GAS 失效
公开(公告)号：JPS6238219A
公开(公告)日：1987-02-19
申请号：JP17620985
申请日：1985-08-09
申请人： MITSUBISHI YUKA ENG
发明人： YOSHIDA TERUO , NISHINO CHIKASHI , OKUYAMA HIROHARU
IPC分类号： B01D53/04
摘要： PURPOSE:To enhance the recovery ratio of product gas, in a pressure swing adsorbing process, by returning a part of the exhaust gas of an adsorbing tower in a regeneration process to the supply line for gas to be purified in an adsorbing tower in a purifying process. CONSTITUTION:Stock gas is compressed by a compressor 21 to be introduced into an adsorbing tower A and N2 is removed by adsorption while product H2 is taken out. An adsorbing tower B is reduced in pressure to atmospheric pressure from an exhaust valve 3b and N2 desorbed along with residual H2 is returned to a stock gas line 11 through a pressure reducing valve 9 and a valve 14. Subsequently, a part of product H2 is introduced into the adsorbing tower B through a pressure reducing valve 6 and a valve 4b to wash an adsorbent and exhaust gas is returned to the stock gas line 11 through the pipe 14 and, subsequently, the adsorbing tower B is again pressurized by product H2-gas to prepare the next adsorbing process. Because the concns. of N2 in exhaust gases at the time of evacuation and washing rise by repeating the processes, a part of the exhaust gas is purged from a valve 10 to lower the concns. of N2 to a set level or less.

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