Development Of Jigger Automatic Control System Based On Plc

Aming at the present condition of the local coal dressing, we chose the coal washery's jigger automatic control system as research object. The traditional jigger control system always use artifical control instruments, which has many problems such as lower craft control ability and efficiency. From the actual applied aspect, we designed and manufactured a kind of jigger automatic control system.Therefore, this study lucubrates the process control method and algorithms based on PLC to improve jigger efficiency.(1) This thesis presents the detailed study on the integrated design of jigger control system, research mechanism and work process of coal dressing.(2) Jigging machine-tiered testing has been a coal preparation industry problems. This thesis presents a kind of definition methods of bed loose,and establishes detection and implementation methods of bed loose.(3)Multi-variable coupling each other,time-variant,heavy nonlinear characteristic are contained in jigging process.The effective control can not be achieved by conventional control theory and methods.This article studies the strategy and realized method of jigging process automation with Fuzzy-controller.Operation result on site shows that jigger automatic control system based on PLC is feasible.Although this system needs improve constantly,this control system plays an important role in stabilizing cleaning coal ash content,decreasing cleaning coal loss,improving product quality and separation efficiency.