| 摘要 |
PURPOSE:To wash and re-activate a catalyst capacity of which is lowered by the accumulation of a poisoning substance, in regenerating a catalyst used in gas treating reaction, by a method wherein the catalyst is washed with an ethylenediamine tetraacetic acid solution and the washed catalyst is dried. CONSTITUTION:When the activity of a catalyst is lowered in reaction for treating an exhaust gas generated by burning coal or petroleum, the flowing of a treating gas is stopped while a nozzle 2 is provided in opposed relation to the opening surface of the gas passing orifices of a reaction tank 1 and an ethylenediamine tetraacetic acid solution from a washing water tank 5 is used as washing water 3 to wash the whole of a catalyst layer 1. By this method, a poisoning component accumulated in the catalyst is eluted and the activity of the catalyst is re-activated. |
