| 摘要 |
PURPOSE:To activate and regenerate quickly a large amt. of poisoned catalysts in a short time by immersing the poisoned catalysts removed from the fixed bed of a catalytic reaction device by each unit of said catalyst into a tapping water tank and rinsing the catalysts. CONSTITUTION:The denitration catalysts of honeycomb bodies or the like consists of the catalysts produced by coating catalytically active components consisting of >=1 kinds among metallic oxides of Ti, V, W, etc. on the surface of a catalyst carrier consisting of alumina, mullite, etc. or catalyst produced by molding the mixture thereof is regenerated and activated by the following method. If the above-described denitration catalyst installed in the fixed bed of a catalytic reaction device are used for a long-time denitration treatment and have deteriorated catalytic activity owing to sticking of dust, etc., such poisoned catalyst is removed by each unit body from the fixed bed. The dust is removed from the catalyst preferably by compressed air or vacuum suction for every unit. The units are then immersed in a rising tank and water is run through the through-holes of the catalyst to rinse and remove the dust-components. Such units are immersed in the 2nd tapping water tank and the poisoning components such as alkali metal deposited or impregnated on or in the catalysts are dissolved out and the catalyst is thus activated. |
