Design Of Sewage Treatment Automated Control System

With the society progressing, the economic development, and the unceasing improvement of living standard, man can reform the ecological environment more effectively and largely. The sewage treatment industry has taken up an important position. But compared with that in other advanced countries, our sewage treatment industry falls behind comparatively. Therefore, studying on the automatic sewage treatment based on the technology of computer control has important practical significance.This essay introduces the current studying situation of the sewage treatment automates in China, the developing trend, and the main process flow of sewage treatment.According to the national conditions and sewage treatment factory reality, the essay also put forward the designing of the main structure of the sewage automatic treatment system.It gives the analysis and the designing of the network circuit controlling in the main structure.According to the handicraft characteristic and the recontrol quest of the sewage treatment, the essay not only raises the systematic software design plan of the sewage treatment that is suitful for S7-400PLC and kingview 6.5,but also carries out the whole introduction and the entire designing plan about the software function getting off place machine on navar. Study on OPC technology and their application in controlling system in sewage automatic treatment has been made in it.And it has also realized the data communication OPC way that the hardware thins out in navar with the software and the software with the software. Meanwhile it has set forth the design procedures that the OPC server and the OPC customer hold, and king of group state software and OPC server connection as well.It concentrates on studying and analysing of the optimum control algolithm foul water pump station helicoidal pump control algolithm , and chooses the best optimum of mixing up control algolithm,which has got fine controlling at present in actual operation effect.Finally, it sums up the job that has completed mainly, analyses the problem that remains to be dealt with, and looks into the distance of the study in this field.