Method for recovering DMAC (dimethylacetamide) solvent and lithium chloride in aramid fiber production waste liquid

The invention relates to a method for recovering a DMAC solvent and lithium chloride in aramid fiber production waste liquid, belongs to the technical field of waste liquid treatment, and solves at least one of the problems that the DMAC solvent and the lithium chloride in the aramid fiber production waste liquid cannot be recovered at the same time, environmental pollution is caused in the recovery process, the energy consumption of the recovery process is high and the like in the prior art. The invention provides a method for recovering a DMAC (dimethylacetamide) solvent and lithium chloride in aramid fiber production waste liquid, which comprises the following steps of: sequentially carrying out flocculation precipitation, azeotropic distillation, distillation and evaporative crystallization and the like, so that the DMAC solvent and the lithium chloride in the aramid fiber production waste liquid are simultaneously recovered, and an azeotropic agent can be recycled; the method has the advantages of low en