Power plant denitration protection device

The utility model discloses a power plant denitration protection device which comprises a protection frame, the protection frame is formed by combining a plurality of protection units, the bottom of each protection unit is provided with a containing cavity capable of being arranged outside a catalyst in a sleeved mode, a plurality of drainage holes matched with catalysis channels on the catalyst are formed in each containing cavity, and the drainage holes are sleeved with filtering parts. The drainage hole penetrates through the bottom and the top of the protection unit. According to the utility model, the plurality of protection units are combined to form the protection frame, and the protection frame is sleeved at the top end of the catalyst, so that a protection barrier for the catalyst can be formed, dust is prevented from directly contacting with the catalyst, the abrasion probability of the catalyst is further reduced, and the service life of the catalyst is prolonged; due to the arrangement of the filt