Tunnel dust removal device

The invention belongs to the technical field of tunnel dust removal, and particularly discloses a tunnel dust removal device. Comprising a frequency conversion disrotatory noise reduction fan, a dust purification box and a controller, the frequency conversion disrotatory noise reduction fan comprises a cylindrical shell, and the frequency conversion disrotatory noise reduction fan is connected with the controller. An ultra-deep pleat type flame-retardant filter element used for purifying air is arranged in the dust purification box, and an air outlet of the frequency conversion disrotatory noise reduction fan is communicated with the ultra-deep pleat type flame-retardant filter element. An annular hollow sleeve used for discharging purified air is arranged on the periphery of a shell of the variable-frequency counter-rotating noise reduction fan in a surrounding mode, and an air channel is formed between the annular hollow sleeve and the shell. The front end of the annular hollow sleeve is connected with the