Sludge composite dehydrating agent and sludge dehydrating method

The invention relates to the technical field of municipal sludge treatment, and particularly discloses a sludge composite dehydrating agent and a sludge dehydrating method, the sludge composite dehydrating agent comprises a discharge increasing agent and a wall breaking agent; the discharge increasing agent is hexadecyl trimethyl ammonium bromide, and the wall breaking agent is an inorganic dehydrating agent. According to the sludge composite dehydrating agent, the inorganic dehydrating agent and the organic dehydrating agent are mixed according to different proportions, so that the water content of sludge is reduced, and the blending combustion efficiency of the sludge and pulverized coal is improved; in addition, hexadecyl trimethyl ammonium bromide is used as a discharge increasing agent in the sludge composite dehydrating agent, surface activity modification is carried out on particles, water among the sludge solid particles can be rapidly discharged, and meanwhile combustion supporting of pulverized coal