Abstract: This paper deals with the analysis and optimization of a N,N-dimethylformamide (DMF) recovery process. The existing three-column energy-saving technique has been simulated with Aspen Plus software. By combining the process integration technology with simulation results, a column grand composite curve (CGCC) is established providing an energy saving target of the whole system. Subsequently, a modification of the process is proposed to improve the energy efficiency. Compared with the existing process, a 6% energy reduction can be achieved by such modification.

摘要： 目前精馏方法回收制革废水中N，N-二甲基甲酰胺（DMF）的主要问题是工艺相对落后、能耗大。针对回收高能耗的问题，本文在对节能型三塔DMF回收工艺进行仿真模拟的基础上，结合精馏原理和夹点分析技术，采用塔总组合曲线（CGCC）的方法描述了各精馏塔内能流的分布状况，进而提出节能降耗的改进方案。提出的新流程与现有流程相比节约能耗6%。