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Fuzzy Based Auto-coagulation Control Through Photometric Dispersion Analyzer

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【Author】 BAI Hua~(1,2), LI Gui-bai~3(1. School of Environmental Engineering, Tongji University,Shanghai 200092, China, 2. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150006, China; 3. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China)

【机构】 School of Environmental Engineering, Tongji University,Shanghai 200092, China,School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150006, China； 3. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China；

【摘要】 <正> The main role of water treatment plants is to supply high-quality safe drinking water. Coagulation is one of the most important stages of surface water treatment. The photometric dispersion analyzer(PDA) is a new optical method for flocculation monitoring, and is feasible to realize coagulation feedback control. The on line modification of the coagulation control system’s set point(or optimum dosing coagulant) has influenced the application of this technology in water treatment plant for a long time. A fuzzy control system incorporating the photometric dispersion analyzer was utilized in this coagulation control system. Proposed is a fuzzy logic inference control system by using Takagi and Sugeno’s fuzzy if-then rule for the self-correction of set point on line. Programmed is the dosing rate fuzzy control system in SIEMENS small-scale programmable logic controller. A 400 L/min middle-scale water treatment plant was utilized to simulate the reaction. With the changes of raw water quality,the set point wa更多还原

【Abstract】 The main role of water treatment plants is to supply high-quality safe drinking water. Coagulation is one of the most important stages of surface water treatment. The photometric dispersion analyzer(PDA) is a new optical method for flocculation monitoring, and is feasible to realize coagulation feedback control. The on line modification of the coagulation control system’s set point(or optimum dosing coagulant) has influenced the application of this technology in water treatment plant for a long time. A fuzzy control system incorporating the photometric dispersion analyzer was utilized in this coagulation control system. Proposed is a fuzzy logic inference control system by using Takagi and Sugeno’s fuzzy if-then rule for the self-correction of set point on line. Programmed is the dosing rate fuzzy control system in SIEMENS small-scale programmable logic controller. A 400 L/min middle-scale water treatment plant was utilized to simulate the reaction. With the changes of raw water quality,the set point was modified correctly in time, as well as coagulant dosing rate, and residual turbility before filtration was eligible and stable. Results show that this fuzzy inference and control system performs well on the coagulation control system through PDA.更多还原

【关键词】 coagulation； dosing rate control； photometric dispersion analyzer； fuzzy control； fuzzy logic inference； optimum； water treatment；
【Key words】 coagulation； dosing rate control； photometric dispersion analyzer； fuzzy control； fuzzy logic inference； optimum； water treatment；

【基金】 Sponsored by the China Postdoctoral Science Foundation (Grant No. 2003033332);Scientific Research Foundation of Harbin Institute of Technology (Grant No. HIT2002.24)

【文献出处】 Journal of Harbin Institute of Technology ,哈尔滨工业大学学报(英文版) , 编辑部邮箱 ,2004年02期

【分类号】TU991.2
【被引频次】1
【下载频次】54

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