Method for regenerating vanadium-titanium denitration catalyst

The invention belongs to the technical field of denitration catalyst regeneration, and particularly relates to a method for regenerating a vanadium-titanium denitration catalyst. The method comprises the following steps: (1) air purging; (2) crushing; (3) roasting; (4) crushing; (5) performing hydrothermal treatment; (6) performing suction filtration to obtain filter cake and a filtrate; (7) treating the filtrate; (8) performing pore-forming treatment, spray drying and roasting on the filter cake to obtain a matrix; and (9) adding the matrix, sequentially adding the treated filtrate and an auxiliary agent, aging and pugging, carrying out extrusion molding, drying and roasting to obtain the novel catalyst. The regeneration of the catalyst is realized by reactivating the active components of the catalyst and the pore structure of the carrier, the active components do not need to be additionally supplemented, no waste liquid is discharged in the regeneration process of the catalyst, the denitration efficiency of