Technology and device for producing ammonium phosphate sulfate product with sewage treatment slag

The invention discloses a technology for producing ammonium phosphate sulfate product with sewage treatment slag. The technology comprises the following steps: producing ammonium sulfate slurry by carrying out a reaction on phosphogypsum as a by-product of a phosphoric acid device, carbon dioxide as a by-product of a synthesis ammonia plant, and synthesis ammonia; producing ammonium phosphate slurry by carrying out a reaction on raffinate acid as a by-product of wet-process phosphoric acid purification, and the synthetic ammonia; mixing the ammonium sulfate slurry and the ammonium phosphate slurry according to a certain proportion, and adding proper sewage slag of a sewage treatment device, conveying the mixture into a granulator/dryer, and carrying out spraying granulation; breaking, screening and washing a semi-finished product to obtain a qualified granular product of 2-4mm; and adding a colorizing and wrapping agent according to needs to obtain the ammonium phosphate sulfate product. According to the tech