Comprehensive utilization process for acid-making tail gas and sulfur-based compound fertilizer production

The invention relates to the technical field of compound fertilizer production, in particular to a comprehensive utilization process for acid-making tail gas and sulfur-based compound fertilizer production, which comprises the following steps: absorbing sulfur dioxide gas in acid-making tail gas by using an amino absorbent to generate an ammonium sulfite solution, and completely oxidizing the ammonium sulfite solution by using air and concentrated sulfuric acid to generate an ammonium sulfate solution; conveying the ammonium sulfate solution to a sulfur-based compound fertilizer workshop, andspraying the ammonium sulfate solution to a material layer in a drum granulator to prepare the sulfur-based compound fertilizer. According to the method, sulfur dioxide in the acid-making tail gas isabsorbed and then is used for producing the sulfur-based compound fertilizer, so that energy is saved, consumption is reduced, comprehensive utilization of N and S element resources is facilitated, and reduction of the product