Desulfurization, denitration and dust removal system

The utility model discloses a desulfurization and denitrification dust removal system, which belongs to the technical field of flue gas treatment of thermal power plants, and aims to solve the problems of recycling and filtering effects, the desulfurization and denitrification dust removal system comprises a reaction mechanism and a recovery mechanism, the reaction mechanism comprises a box body and fixing clamps which are equidistantly distributed at the upper part of the inner wall of the opposite side of the box body, a first filter screen, a second filter screen, a third filter screen, a fourth filter screen and a fifth filter screen are inserted into the inner wall of the bottom of the fixing clamp, a spray head is fixed to the lower portion of the inner wall of the fixing clamp welded to one side of the box through bolts, and a fan is fixed to the lower portion of the outer wall of one side of the box through bolts. According to the ammonia water recycling device, the tank body is connected with the amm