Design Of Process Control System Of Selected Coal Based On PLC

New energy technology is developing rapidly and its application market is gradually extensive.However,coal will remain the main energy source in China for a period of time in the future,accounting for a large proportion of all energy consumption.In order to adapt to the strategic adjustment of the national energy revolution and the economic situation of the coal market,realize the clean utilization of coal,improve the quality of commercial coal,increase the output of clean coal and protect the environment.Taking the practical application of Lijiahao coal preparation plant of Shenhua Baotou energy company as the research background,this paper analyzes the coal preparation process and the process parameters that affect the coal preparation effect.it focuses on the study of the relaxation screen weighting medium shallow tank separation process,the software and hardware equipment,PLC,automatic instruments and modern network technology that make up the process control,the locking relationship between the coal preparation process control and mechanical equipment,etc.to realize the automatic adjustment of the qualified medium density,the liquid level in each bucket,and the monitoring and monitoring in the centralized control room.As the system is a control object with large delay and large delay,a control algorithm combining traditional PID control and modern control theory is adopted.Li Jia Hao Coal Preparation Plant uses AB PLC and industrial computer in the United States as the core of the centralized control system.It adopts computer network,automatic detection and other technologies to integrate all the equipment in the process into the centralized control system.It can realize the start-up and shutdown of the whole system in sequence,realize the automatic control,automatic monitoring,automatic protection or alarm,automatic detection and so on of the equipment in the whole process,complete the automatic adjustment of production process parameters,realize the safe and stable operation of the equipment,and improve the hourly coal throughput.Ensure the quality and quantity of product coal,thereby improving production efficiency,ensuring the stability of production process system and parameter indexes,effectively reducing equipment failure rate,and achieving the best control purpose;Installing an industrial TV system in the control room can feedback and monitor the production status in real time,find problems in time,greatly reduce the number of on-site workers,reduce labor intensity and improve labor production efficiency.In this way,while improving working conditions,it can also reduce production costs and increase production profits.