Application of the PLC-based and touch screen controlled teetered-bed separator at Yanjiahe Coal Preparation Plant in northwest China's Shaanxi Province

In order to improve the separation efficiency and sharpness of the MJXJ Teetered-bed separator (TBS), the PLC and touch screen integrated method is applied for monitoring and control of the separator's operating process. Practice shows the combined control mode has met with a remarkably good result, much improving the separator's operating efficiency. All of the valves and actuators are under PLC control, and the upward water flow and bed density values and real-time flow state are respectively measured and collected by flowmeter and densimeter and then sent to PLC. These data can be displayed on touch screen through processing with PLC's self-contained PID function, so as to enable TBS to operate in a highly efficient and reliable manner.