Abstract: A method based on non-linear programming is proposed to optimize water network in batch chemical processes with a single contaminant. An intermediate tank is used to receive the discharge water from each process and provide water to operations in batch processes，which increased reuse of process discharge streams. By pre-ordering the operations with discharge time from earlier to later，and combining with other heuristic rules，a superstructure of water network was constructed and simplified. The corresponding mathematic model involved a set of nonlinear equations is solved by the GAMS (general algebra model system) software tool. This method could achieve minimal fresh water use and optimal network assignments simultaneously. The results of a case study show that the method was effective.

摘要： 对间歇化工过程用水网络优化提出了基于非线性规划的优化设计方法。该方法采用一个中间贮罐用来接收各单元操作的排水，增加各单元操作之间的水再利用机会。对所有单元操作按照排水时间从早到晚进行排序，只有排在前面的操作才提供给后面的操作用水，结合其他的简化规则，构造了用水网络超结构。该超结构的数学模型为一组非线性方程，利用GAMS软件进行求解，得到各个周期的最小新鲜水量和最优的用水网络结构。实例计算结果表明，该方法可行。