Water Plant Control System Based On Fuzzy Control Realization

In the21st century, automation technology have been developing rapidly, and the application of it in the water industry has become more and more mature. In the water environment of poor development and the market economy under double pressures, not only requires the waterworks ascension water treatment of ability, and can keep for a long time for the best operation condition. This paper base on JinXi waterworks in the automatic control system for the research background, the thorough research of water works water treatment technology and process parameters, the analysis of water treatment process control objectives, and the use of advanced control theory and control technology to realize the automation of waterworks control system to achieve good goals of the water plant factory water water quality, production of high security and control real-time.Water treatment technology of alum adding control system, is the complex process system of the delay, the complex nonlinear multivariable. It is difficult to control, still using artificial experience with computer remote control dosing way. Because it is too deep to system dosing quantity of subjective factor, which reduces the stability of the alum adding control system. According to the acquisition of a lot of experimental data and the flow of water source water source analysis, turbidity and source water temperature on the influence factors of water treatment based on the flow current (SCD) and precipitation water turbidity feedback control method, combining the fuzzy control theory research, design the alum adding fuzzy controller and program realization process. At the same time, in the ponds control system, analysis of constant water level control for viewing after turbidity water filter and the influence of the defects of PID control algorithm is designed, and the constant water level viewing of the fuzzy controller and program realization process. Thus, for water quality out of water works offers double insurance.According to the analysis of the water plant PLC control system of complex function, insecurity and low extending, it has designed the hardware system of KunTeng PLC. Research the three important craft of the Chlorine dosing,alum adding and filtering in water treatment process and theirs control function, meanwhile, according to the selection principle of hardware equipment, scheduled input/output module of the type and number of PLC control station and achieved the PLC control system configuration module. At the same time, use InTouch9.5powerful configuration function, the completion of the water center control system of the man-machine interface and alarm function design, achieve a long-distance scheduling of water works production operation, the production equipment and data acquisition and processing. The system is running until today, it is steady to system. It is improve the water plant operation safety of the automatic control system.In paper finally, the old system based on the serial port RS485of the total line of Modbus Plus control network, analysed some defects of old system and improve water control network. Based on industrial Ethernet network technology, realized new control network of the waterworks. Now the network have been operated. It is enhanced the automatic control of the system operation reliability and efficiency.