Industrial smoke exhaust fan for warehouse

The utility model relates to the technical field of industrial smoke exhaust fans, in particular to an industrial smoke exhaust fan for a warehouse. According to the technical scheme, the dust removal device comprises a shell, a protection assembly and an auxiliary assembly, a protection sleeve is installed outside the shell in a surrounding mode, the protection assembly is installed on one side in the shell, an installation frame is installed in the protection shell, a dust removal framework is installed on the inner side of the installation frame, two sets of connecting plates are installed at the two ends of the protection shell, and the auxiliary assembly is installed on the other side in the shell; a transmission rod is mounted on one side of the mounting plate, fan blades are mounted on the outer side of the transmission rod, and a perforated impeller is mounted at one end of the transmission rod. Through the perforated impeller in the auxiliary assembly, part of airflow can flow to the low-pressure sur