Intelligent switching control for cement raw meal calcination process

In raw meal calcination process, since boundary conditions of raw meal change frequently, the decomposition rate of raw meal (RMDR) cannot guarantee the desirable ranges. Therefore, C5 feeding tube was blocked and the load of rotary kiln will increase. To solve above problem, an intelligent switching control method is proposed to control the calciner temperature into their setpoints. This method for raw meal calcination process consists of four modules, namely a easy calcination controller, a difficult calcination controller, a abnormal condition controller, and a switching mechanism. The proposed approach can select right controller according to the change of the working conditions and has been successfully applied to the raw meal calcination process of Jiuganghongda Cement Plant in China and its efficiency has been validated by the practical application results.