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.