Method for preparing sodium carbonate and ammonium chloride from sodium chloride waste salt in short process

The invention provides a method for preparing sodium carbonate and ammonium chloride by using sodium chloride waste salt in a short process, and relates to the technical field of sodium chloride waste salt treatment. The method comprises the following steps: generating mixed crystals of sodium bicarbonate and ammonium chloride on the premise of not adding other substances to decompose bicarbonate radicals, dissolving ammonium chloride in the mixed crystals by adopting ammonium chloride cooling mother liquor, and using sodium bicarbonate remained in a solid phase and sodium bicarbonate newly generated by a subsequent double decomposition reaction together to obtain a sodium bicarbonate solid; then calcining to obtain a sodium carbonate product, and cooling and crystallizing a salting-out crystallization mother solution obtained by salting-out crystallization to obtain an ammonium chloride product. The method has the advantages of short process flow, no high-temperature ammonia distillation process, no water ba