Design And Application Of The Automatic Control System For CASS Technology In Sewage Plant

With the continuous development of Chinese economy and society, a large number ofwastewater generated in our production and life caused the pollution of the environment.itbecomes more and more serious, of course, at this stage we were collected after treatment ofwastewater recycling way, not only to achieve the reuse of water resources, effectively savingwater resources; also reduce the water resources environmental pollution of waste water. Dueto the development of wastewater treatment technology and electronic communicationequipment backward constraints, the traditional sewage treatment plant mainly rely on theoperator manual operation to control the start and stop of the production equipment, you needto configure a large number of skilled operators, unstable factors in the process and wastewater treatment, led directly to the low production efficiency. Obviously this control mode hasbeen relatively backward, can not meet the current sewage treatment factory productionmanagement requirements. With the rapid development of computer technology andautomation control technology today, design a set of computer automatic control system forthe sewage treatment plant is of practical significance.Based on the project of the Guangzhou panyu nancun sewage treatment plant. Itintroduces the sewage treatment process, automatic control system in sewage treatment plantis designed which is based on industrial Ethernet ring Network.The system is integrated byindustrial control configuration software, PLC station and field intelligent instrument, and ithas realization of sewage treatment plant for decentralized control, centralized management.from the following three aspects of work:Design Automatic control system: according to the sewage treatment process, determinethe structure of the automatic control system and the hardware products.Design PLC control station program: coordinating field intelligent instrument to collectthe data of several control quantities-sewage fluid position, current capacity. at the same time,according to the sewage treatment process and the request of the control, every fieldapparatuses like coarse and fine grids, life pump, air blower carries are on correspondingcontrol.Design Monitoring software: according to the sewage treatment process. design thesewage treatment process dynamic monitoring menu and the equipment remote operation,real-time display the running status of the equipment and water quality parameters, design theproduction data report,water quality parameter curve for query,alarm and so on. The automatic control system has been put into field operation successfully for one year,the automatic control system is stability, the quality of outlet water is stability, the treatedwater quality is up to the State regulation, and reduce the cost of manufacturing, to reach therequirements of the design, customers are satisfied.