| 摘要 |
Provided is a method for preparing a used SCR de-NOx catalyst, comprising recovering a used SCR de-NOx catalyst of which service life is substantially terminated, cleaning and rinsing the recovered catalyst, performing performance inspection of the catalyst, acid-treating the performance inspection finished catalyst, correcting performance of the acid-treated catalyst, and heat-treating the catalyst. A method for preparing a used SCR de-NOx catalyst comprises: a contaminant cleaning step of removing contaminants presenting on a surface of a recovered SCR(selective catalytic reduction) catalyst using compressed air; an ultrasonic rinsing step of rinsing the cleaning step finished catalyst using ultrasonic waves; a catalyst inspection step of inspecting performance of the rinsing step finished catalyst; an acid-treating step of acid-treating the inspection step finished catalyst; a performance correcting step of correcting performance of the acid-treating step finished catalyst; and a heat-treating step of heat-treating the performance correcting step finished catalyst. The ultrasonic rinsing step is performed by rinsing the catalyst using ultrasonic waves for 30 minutes after injecting the recovered SCR catalyst and water into a reactor having an ultrasonic equipment. |
