| With the rapid development of our economy, the industrial wastewater, sewage purification processing has become a top priority, especially itself need high water purification of the industry, purified water quality is put forward higher request. In recent years, with automation technology, equipment and on-line monitoring instrument of development, which makes the traditional water treatment process the application of advanced process technology for processing becomes possible. Also, that the processing of water treatment automated monitoring and real-time control possible.Based on the current situation of domestic and foreign pure water preparation technology analysis, according to clinical blood dialysis process to the pure water requirements, using the obtained the widespread use of advanced level2the comparison of the reverse osmosis and EDI method, the blood dialysis water treatment system in detail the process of narrative and the design, make the process design to better the optimization effect than ever, the traditional water treatment process by the production of purification water quality better, more in line with the clinical needs.At the same time based on the practical application of the automation technology, design a kind of based on PLC (programmable controller) control system. Through to the PLC basic structure and working principle of the paper, from the system for the requirement of each module of PLC for choosing, and of PLC the I/O address detailed distribution. To realize the automatic control system, the electrical diagram is essential, according to the needs of the automatic control system of the electrical diagram to carry on the design. The control system of the functions of the simple paper, introduces the programmable controller in water treatment of the application of the monitoring system, based on the control principle of the PLC design hemodialysis water treatment process of automatic monitoring menu. Through the monitor screen can realize to the water treatment process of automatic implementation monitoring.Through the process of design of the whole system briefly, show that the feasibility of the design. The system safe, reliable, and a high degree of automation, is a simple, economic and practical automatic control system, can completely meet the blood dialysis on purified water is the clinical needs. |