提出了过程全局夹点分析与超结构混合整数非线性规划 (MINLP)相结合的能量集成最优综合法 .各单过程内部换热优化匹配后 ,进行各过程剩余冷、热负荷与公用工程系统的全局夹点分析 ,确定全局热集成目标 ,在此基础上建立包含过程剩余热负荷产生各等级蒸汽、剩余冷负荷使用各等级蒸汽加热的各种可能匹配方案的公用工程换热网络超结构及其MINLP模型 ,采用混合连续进化算法求解得到过程与公用工程换热网络最优改造方案 .大型乙烯装置能量集成应用算例表明 ,可充分发挥全局夹点分析法确定改造目标的简洁实用性和超结构MINLP寻求最佳方案的优点 The optimal integrated energy integration method based on global pinch analysis of process and MINLP (superstructure mixed integer nonlinear programming) is proposed.After the internal heat exchange in each single process is optimized and matched, the remaining cold and heat loads in each process are compared with the common engineering system Global pinch analysis to determine the goal of global thermal integration. On the basis of this, a new heat transfer network superstructure for public works which contains all possible levels of steam and the remaining cooling load with various levels of steam heating is established. Its MINLP model is solved by hybrid continuous evolutionary algorithm to get the optimal reconstruction scheme of heat exchange network in process and public works.The application example of energy integration of large scale ethylene plant shows that the global pinch point analysis method can be used to determine the conciseness and practicability of the reforming goal Structure MINLP seeks the best solution