玉米浆蒸发工序是湿磨法玉米淀粉工艺下游生产的关键过程。国内某玉米淀粉生产企业在该工序采取多效蒸发技术脱除水分。应用化工流程模拟软件Aspen Plus对该厂现有的六效蒸发工艺进行模拟，通过分析讨论玉米浆多效蒸发工序的用能状况，提出了两种优化策略：一是在进料前增设1台预热器；二是将工艺流程由混流改为逆流。采用策略二改造后的工艺流程较原有工艺节省了1.67 t/h新鲜蒸汽用量，模拟结果可以为工厂的节能改造提供参考。

The evaporation of corn steep liquor is a crucial process in the downstream production of the wet corn starch milling process.A certain corn starch factory in China employs multi-effect evaporation technology in this process.Aspen Plus chemical process simulation software is used to simulate the existing six-effect evaporation process in the factory.Through analyzing and discussing the energy consumption situation of the multi-effect evaporation process for corn steep liquor,two optimization strategies are proposed.One is to add a preheater before feeding,and the other is to change the process from the mixed flow method to the countercurrent flow.The second modified process saves 1.67 t·h^-1 of fresh steam.The simulation results can provide reference for the energy-saving renovation for similar factories.

李义(1964-),男,硕士,研究方向为玉米现代化精深加工,Li-yi1@cofco.com