| abstract |
The invention belongs to the fields of environmental protection technology and catalytic denitration, and particularly relates to a regeneration method of an arsenic poisoning SCR denitration catalyst. The method comprises the steps of firstly carrying out soot blowing and impurity removal on the arsenic poisoning SCR denitration catalyst, then carrying out ultrasonic cleaning by using deionized water under the condition of introducing ozone-air mixed gas, then carrying out soaking and cleaning by using weak alkaline solution, then carrying out two-stage gradient reduction by using different reducing gases at different temperatures, and finally carrying out rapid heating and roasting in the air to obtain the regenerated catalyst. After the method is adopted to regenerate the SCR denitration catalyst poisoned by arsenic, the denitration efficiency is recovered to the level of a fresh catalyst, the arsenic removal rate reaches more than 99 percent, and the arsenic poisoning resistance of the regenerated catalyst is greatly improved. In addition, the method has simple process and stronger operability, and is suitable for large-scale industrial production. |