Multi-Objective set point optimization control of grate cooler considering energy efficiency evaluation

Abstract

The grate cooler is a key piece of equipment for cooling cement clinker, whose parameter adjustment has a notable influence on energy consumption and equipment operation. This article proposes a multi-objective set-point optimization control method for the grate cooler control system, which takes into account energy efficiency evaluation. Based on the energy efficiency analysis of the grate cooler, the secondary air temperature, tertiary air temperature, and outlet clinker temperature are used as energy efficiency evaluation indicators, and a grate cooler energy efficiency evaluation model is established to construct a multi-objective function. After that, the grate pressure set point and fan current set point are optimized by utilizing the MOEA/D algorithm, and the predictive control method is combined to perform rolling optimization of the control parameters. Eventually, a simulation experiment is conducted based on the actual production data, and the simulation results demonstrate the feasibility and effectiveness of the optimized control method.