Coupling type multi-stage particle bed dust removal device and dust removal method

The invention relates to the technical field of environmental protection and dust removal of dust-containing gas, in particular to a coupled multi-stage particle bed dust removal device and a dust removal method. The device comprises an inner cylinder, a shell, a coarse filter material inlet pipeline, a fine filter material inlet pipeline, a coarse filter material shunting component, a fine filter material shunting component, a dusty gas inlet pipe and a clean gas outlet pipe. According to the dust removal device and the dust removal method disclosed by the invention, according to the characteristics of high dust content and wide dust particle size distribution in dusty gas, large-particle-size dust with relatively large inertia in the gas is primarily separated by utilizing the rotary motion of airflow, and the dusty gas subjected to primary separation enters the moving particle bed to be subjected to multi-stage fine separation; therefore, the purposes of reducing dust entrainment of the moving bed and impr