Combined type self-dedusting pyrolysis reactor and method for pyrolysis dedusting coupling

The invention relates to a combined type self-dedusting pyrolysis reactor and a method for pyrolysis dedusting coupling. The reactor specifically comprises a reactor tank, wherein a fine powder pyrolysis area and a granule pyrolysis area are arranged in the reactor tank, crude gas produced by pyrolysis in the fine powder pyrolysis area is primarily filtered by taking pyrolysis semicoke in the granule pyrolysis area as a filter material and then is discharged. According to the combined type self-dedusting pyrolysis reactor, large particle fine powder and small particle fine powder are subjectedto subarea and graded pyrolysis, so as to promote heavy component products to pyrolyze to generate light component products, and primary dust removal by filtration is performed on a granular layer formed by large-particle pyrolysis of crude gas with gaseous phase carrying a great amount of dust after fine powder pyrolysis, so as to realize refined dust removal, achieve the aims of dust removal and pyrolysis deep coupling