Optimization research of the circulating water consumption based on stage-wise superstructure algorithm

In this paper, aiming at the water-consuming of the circulating water system in the petrochemical enterprises, the stage-wise super structure model of the heat exchanger network is established. And the model can be solved by using the MINLP programming method. Considering the characteristics of no-shunt and shunt, the simultaneous optimization of heat exchanger networks is implemented, which is based on the stage-wise super structure method. Thus the company´s energy saving can be achieved and the consumption goal of the minimum circulating water system can be also realized. The proposed optimization and technology road-map of the industrial water recycling system have an important reference value for the research and application of process optimization.