Multilayer replaceable tail gas purification device for deformed steel bar production and processing

The utility model discloses a multi-layer replaceable tail gas purification device for deformed steel bar production and processing, relates to the technical field of deformed steel bars, and aims to solve the problem that whether an internal filtering mechanism is blocked or not cannot be known at the first time due to the fact that no real-time flow detection element is arranged in an existing multi-layer purification mechanism. The tail gas purification device comprises a tail gas purification device body, an upper sealing cover plate is arranged on the upper end face of the tail gas purification device body, three replacement plates are arranged on the upper end face of the upper sealing cover plate, handle rods are arranged on the upper end faces of the three replacement plates, and the lower ends of the three replacement plates penetrate through and extend into the tail gas purification device body. The tail gas purification device comprises a tail gas purification device body, an inner cavity is formed