基于PLC的重介质选煤自动控制系统的设计与研究

Design and Research of Automatic Control System for Heavy Medium Coal Preparation Based on PLC

针对传统重介质选煤自动控制系统存在的分选精度低、控制精度低、滞后性严重等问题,采用自整定PID控制技术设计了一套以S7-1500 PLC为核心的重介质选煤自动控制系统,可实现重介质选煤过程的集中控制及重介质悬浮液的密度调节。经实际测试,该系统运行稳定,控制精度高,快速性良好,可实现选煤过程的自动控制与参数监测。

Aiming at the problems of low separation accuracy, low control accuracy and serious lag in the traditional heavy medium coal preparation automatic control system, this paper uses the self-tuning PID control technology to design a set of heavy medium coal preparation automatic control system with S7-1500 PLC as the core, which can realize the centralized control of heavy medium coal preparation process and the density adjustment of heavy medium suspension. The actual operation test shows that the system has stable operation, high control precision and good rapidity, and can realize the automatic control and parameter monitoring of coal preparation process.