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对阴极电泳乳液脱除液中典型溶剂一甲基异丁基酮、丁酮和水的剩余曲线及共沸组成进行分析,提出了精馏-倾析联用工艺分离该混合溶剂的流程。应用流程模拟软件Aspen Plus进行模拟和灵敏度分析,确定了精馏塔的最佳塔板数、原料进料位置、回流比及液-液倾析器参数,得到质量分数大于99.5%的MIBK产品,且回收率超过95%,实现了阴极电泳乳液脱除液中甲基异丁基酮的高效回收。通过对分离系统各塔冷凝器和再沸器热负荷的计算,得到了处理量为6000 kg/h阴极电泳乳液脱除液分离系统所需要提供的冷却水量约56.25t/h,需要提供的中压饱和蒸汽(1.9 MPa)约为1.9I t/h。研究结果可为生产装置的设计和能耗的控制提供重要参考。
The residual curve and azeotropic composition of typical solvents, methyl isobutyl ketone, butanone and water in catholyte electrophoresis emulsion removal liquid were analyzed, and the process of separating the mixed solvent by distillation-decantation was proposed. Simulation and sensitivity analysis were carried out using Aspen Plus software. MIBK products with the mass fraction of more than 99.5% were obtained by determining the optimum tray number, raw material feed position, reflux ratio and liquid-liquid decanter parameters. And the recovery rate is more than 95%, the efficient recovery of methyl isobutyl ketone in the cathodic electrophoretic emulsion removal solution is achieved. Through the calculation of the heat load of condensers and reboilers in each tower of the separation system, the cooling water volume required for the catholyte electrophoretic emulsion removal liquid separation system with a capacity of 6000 kg / h is about 56.25 t / h, Pressure saturated steam (1.9 MPa) is about 1.9 I t / h. The results can provide important reference for the design of the production plant and the control of energy consumption.