Downstream moving particle bed dust removal device and dust removal method

The invention provides a down-flow moving particle bed dust removal device and a dust removal method. The down-flow moving particle bed dust removal device comprises a shell and an air guide inner component arranged in an inner cavity of the shell; a dust removal filter material inlet and a dust removal filter material outlet are formed in the top end and the bottom end of the shell respectively, the dust removal filter material inlet is connected with a filter material inlet pipeline, and the output end of the filter material inlet pipeline is located in the shell; a gas inlet and a gas outlet are formed in the shell, the gas inlet is higher than the output end of the filter material inlet pipeline, and the gas outlet and the gas guide inner component are both lower than the output end of the filter material inlet pipeline; the gas guide inner component is connected with a gas collecting pipe which is communicated with the gas outlet. According to the dust removal device, dust-containing gas and dust removal