The main equipment of the OG system for wet dedusting of iron and steel converter is: smoke hood, inclined flue, gravity deduster, one wen, two wen, spray tower, dehydrator, etc. During the annual overhaul, the smoke hood and inclined flue are replaced according to whether the vaporization cooling pipeline is damaged, the gravity deduster is repaired according to the wear condition, and the high-pressure water is washed according to one wen, two wen, Replace the internal nozzle of spray tower and clean it