Chemical Water Treatment Monitoring And Control System Development And Application Research

In the normal operation of the thermal power unit, boiler plays an important role, in order to prevent the impurities in the water and ion to cause boiler tube wall of salt deposition, corrosion and fouling, configure the chemical plant for chemical water purification treatment, at the same time as the unit parameters and the dramatic increase in capacity now, major changes have taken place in coal-fired power plant chemical water treatment equipment, puts forward higher requirements on chemical water treatment control, so a good monitoring system can not only guarantee the normal operation of the boiler make-up water treatment equipment, at the same time also can guarantee the quality of make-up water, in the safe operation of thermal power unit for real-time monitoring, avoid unnecessary economic losses.Chemical water treatment is the core of the normal operation of thermal power plants in the foundation, in order to better improve power plant daily security operation, in addition to salt water, ultrafiltration, reverse osmosis, running water, water of pass in and out of bed, Yin and Yang and the mixed bed need every step in the process of chemical water treatment monitoring and control system of regulation and control, this paper takes hebei datang international plump thermoelectric limited liability company the first phase of the two sets of domestic 300MW subcritical parameter coal heating unit as an example, mainly the applications of PLC control system to power plant boiler chemical water treatment system, the system is set up in combination with the touch screen technology, have a better protection of pipe network pressure, prolong the service life of the valve, to improve the optimization level of the power plant chemical water treatment control system, for the whole power plant safe and stable operation is of great significance. Specific content is as follows:First, the paper selected topic background and significance, through the study at present, the coal-fired power plant chemical water treatment control system present situation analysis, points out that the chemical water treatment monitoring and control system for the current development status and trend, analyze the feasibility of the application of PLC monitoring system.Secondly, the paper puts forward design schemes for monitoring control system for chemical water treatment, will be the focus of this study, including the design of hardware platform and software PLC system, PLC control ability of automatic monitoring of chemical water treatment, so as to promote chemical water treatment control system design and implementation.Then, design the chemical flow automatic control system, through the advanced touch screen design, make the control system more convenient operation, in actual operation, chemical water flow of automatic control system not only improves the equipment safe and reliable operation also saves improves the operation economy of power plant auxiliary power.Finally, the PLC monitoring system of thermal power plants in the application of chemical water treatment system to make a summary and analysis of the chemical water treatment PLC monitoring system in this paper, we study the application prospect in the actual power plant, the chemical water treatment in the future study lay a foundation for perfecting the PLC monitoring system.