The Research And Realization Of The Automation Control System In Modern Waterworks

There are four key subjects in modern water works automation control system, they are mainly the water quality testing technique,the water processing control technique,the frequency conversion technique and the comprehensive automation. Thesis in combining the foundation of the actual engineering, main research among them of three aspect, namely the water processing control technique, frequency conversion technique and comprehensive automation.The water processing controls technique is an assurance in water supply, mainly includes the hurl of the medicine to add and the anti-flush of filter.This paper puts forward a project of improvement based on the analysis and study of existingly adding the alum and chlorine automation control system. One is a new adding alum control method ,which includes the turbidity and flow of the source waters .It is not like the control method before,which includes only the flow of water.That project controls the blunt distance of metering pump according to the source water current quantity and muddy degrees, controls the frequency of metering pump according to the deviation of the initial values and feedback current of the streaming current monitor.That project combines to take the amount of water current and take the water interference of the muddy degree to move the variety, then the hurl adds the interference of the quantity to move the variety, combining at the same time inclined take care of a deviation, have the accuracy of control high, stabilize the quick characteristics of speed, solved the antinomy of the stability and the control accuracy to some extent. Can also overcome the on-line instrument diagraph is not a settled weakness. The second is added the chlorine to design the feedback to the water factory filter & string class of control project, should control the project to add the chlorine standard after can adjust the filter automatically, need not the artificial intervention, lower the influence of the artificial error margin, carry out the real automation.Frequency conversion technique is the key that the factory of water lowers the electricity to consume.Comprehensive analysis of this paper change the economy energy of frequency and change the frequency principle of the soft start circularly, and changed to press to change the quantity and constantly to press to change the quantity to carry on the research towards changing the economy energy of frequency two kinds of to carry out the way.The constant presses to change the quantity water supply method according to the variety of a factory water pressure dint, passing the controller of PID to regulate to change the machine of frequency , to use the factory water constant pressure to settle. Change to press to change to measure the way then according to the pressure of a factory water and send the amount of water to regulate to change the machine of frequency to turn soon and frequency, to use the factory water pressure dint along with send the variety but varieties of the amount of water, economized the electricity to consume on the larger degree, is a kind of better economy energy project. Deduced to change to press the engineering formula of change the quantity water supply method at the same time, that formula can throw in conveniently physically in the engineering, can obtain to compare good of economy energy result.Supply water the comprehensive automation develops continuously with the modern network technique.The modern factory of water not only is an independent individual only, but also want to share the water factory information with the external world, the management and the supervision of the easy to and upper grade section.For carrying out the target that the control integral whole turn, design to supply water a network structure of the system, and combined the existing network of GSM/ GPRS to design the long range data to collect the terminal.Combine the Langli water factory engineering , designed the water factory filter pond anti- flush the process and the non level pressure and variance water supplying system.Return to supervise and control the system to carry on the introduction towards supervising and control the software Intouch and the place of honor machines at the same time.