The Research Of Inlet Pressure Control System On Rotary Kiln For Iron Oxide Red

The iron oxide red consists of the ferric oxide and is chemically inactive. As the pigment, it has a broad application and market prospects at home and abroad, because of its low cost and exceptional durableness. Recently, the red of iron oxide is produced by using the rotary kiln in most domestic industries. This method has the advantages of large-scale production and high efficiency.The inlet pressure is a main factor in the rotary kiln control, it is characterized by nonlinearity and time-delay. And it influences the stability of the control system. In order to get stable control for the pressure, a strategy of single neuron self-adapting PID controller via a Smith predictor is put forward. This method can also improve the control quality and robustness of system and has been proved by the simulation. The intelligent controller is simulated with Simulink on the platform software Matlab. The result shows that the proposed scheme has a good control character and strong robustness.Meanwhile, the hardware system and software system are configured in the process of inlet control of rotary kiln based on PLC, Profibus and KingView. The Human Machine Interface(HMI) and Supervisory Control And Data Acquisition(SCADA) are written based on the software Epro and KingView as well. Therefore, the centralized management and decentralized control are realized virtually in the production process of iron oxide red. Also this system has been tested to be stable and reliable in practice.