The heat pump distillation system (DMAC solvent recovery) built by Keyuan Ruineng has passed performance acceptance and commenced operation at a fine-chemical client site.

Operating data shows solid-waste discharge reduced to 5.8 t/year versus traditional three-effect evaporation and biochemical processes, with annual net profit of 1.955 million CNY — truly turning wastewater treatment from a cost item into a profit item. With high automation, fewer operators and a small footprint, the system applies widely to solvent-wastewater resourceization in fine-chemical and pharmaceutical industries.