Flue gas purification and dust removal device convenient to detect

The flue gas purification and dust removal device convenient to detect comprises a machine body, a cover plate is arranged at the top of the machine body, clamping blocks are installed at the four corners of the bottom end face of the cover plate, clamping grooves are formed in the four corners of the bottom end face of the machine body, the clamping blocks are connected with the clamping grooves in a clamped mode, and limiting grooves are formed in the bottoms of the clamping grooves. A telescopic spring is installed in the limiting groove, a limiting plate is arranged at the top of the telescopic spring, the top end face of the limiting plate is attached to the bottom end face of the clamping block in an extrusion mode, and a through hole is formed in the top of the clamping block. The cover plate is convenient to install through the designed clamping blocks and clamping grooves, detection and maintenance in the later period are facilitated, the cover plate is convenient to fix through the designed fixing c