Design Of PLC Automatic Control System For The Disposed Oil Sewage In Power Plant

The oil sewage disposed process is a complex disposal technique. The disposal process is more difficult for the change of PH Flux temperature of raw water and the other polluted quality. At present the disposed water by the system of oil of sewage is unstable and high cost. Now the method for the oil of sewage have physics chemistry physical chemistry and biology etc. In the every disposed method has its own specially, Basis of the oil sewage condition of power plant. The text use chemic method. Another word is method of Flocculation-deposition. Injecting Dosage into sewage. Making small suspends grain and the electrophorus colloid gather into bigger colloid and deposit. Separated it from water and purify the oil sewage. Make disposed oil water up to grade.Dispensation and Dosage is the key of flocculation-deposition technique. The precision of control is available for the technical. The text use PLC automatic Control System to assure the arithmetic and precision, making the system technical parameter available.First the text introduces simply condition of the oil sewage in the domestic and international. Research content and research object. The Coagulant Dosage Automatic Control System is discussed emphatically. Including the relation is put up between target standard and the infection factor by date analyzed chart and educational established and sum up the best working point. The target standard including SS COD and OIL .The infection factor including the dosage of PAC PH Mill INTENSION and TIME. On the basis of craft character and control request, it makes a selection of scheme to the whole control system. Finally a scheme is chosen and described as follows: CPU222 of SIEMENS PLC S7-200 is used as the control kernel. V606IC TOUCHER is used as communication man and machine. Controlling pump, compressor, metric pump of system by gathering andanalyzing the flow, PH of raw water .The text also simply introduces the monitor system from function. List the principle-composing chart of Automatic system, Flowing chart of PLC software, and the part main program. The working principle, controlled~flowing and the main arithmetic of software are introduced in the making liquor of automatic system. At last the text summarizes the research resolute and gives more thoughts.The target standard passes the district standard. The dosage of medicine reduce more, More aspect arrive the expected resolute.