Pre-dedusting structure of dust-containing flue gas SCR (Selective Catalytic Reduction) denitration system

The invention relates to the related technical field of denitration and dust removal, discloses a pre-dust-removal structure of a dust-containing flue gas SCR denitration system, and aims to solve the problem that filter plates are easy to block when working for a long time, a plurality of layers of filter plates are arranged in a dust removal bin, and pores among the plurality of filter plates are sequentially reduced, so that layered filtration is realized; a backflushing pipe is arranged between the filter plates, backflushing fan blades in the backflushing pipe enable airflow in a backflushing cavity to be opposite to airflow between the filter plates in flow direction, filter holes in the filter plates are backflushed through backflushing airflow generated in the backflushing cavity, the effect that the airflow cleans and blocks the filter holes is achieved, particles filtered by the filter plates can enter the space between the two filter plates, and the particles are filtered by the filter plates. And