System for recycling sludge subjected to chemical drying

The invention utilizes a recycling technology performing drying treatment of raw sludge by using sludge subjected to chemical drying treatment. By recycling treated sludge, the raw sludge can be evenly and well mixed with a composite reagent in the treatment process, and good effect is played on moisture removal. The treatment process comprises the steps of 1 using chemical drying to treat the sludge and fully mixing the sludge and the composite reagent; 2 performing air-curing and smashing; enabling the moisture content to be reduced to be 30-40% after the sludge subjected to chemical drying is dried naturally, using a sludge smashing device to smash sludge cakes into 0.5-1mm of powder-like particles, and smashing the sludge particles to be approximate to power after further drying; and 3 performing circulating input, mixing power obtained through the drying and smashing and an early-added reagent in the composite reagent, further adding other reagents in the composite reagent and then performing the circular process. The system for recycling the sludge subjected to chemical drying takes the sludge treatment cost and treatment effect as main factors and reduces secondary environment pollution.