Study On The Intelligent Optimization Technology Of Water Supply System Based On Water Quality Guarantee

The safety of drinking water relates to the livelihood and social stability. With thedevelopment of social economy, the pollution of source water and pipe network water isincreasingly outstanding. Affected by aging and corrosion of the distribution pipeline,the secondary pollution is becoming more and more serious. Meanwhile, the unifiedtechnological platform of monitor, dispatching management and water quality controlhas not been established in most city of our country at present. Therefore, to researchthe optimization technology from source water distribution to simulation modeling andoptimal operation of water supply system will be of great important significance, andwill provide technical support for safety guarantee of drinking water.At First, on the study of source water distribution, the emphasis of the pastresearch was to reduce the energy consumption by optimal allocation of water quantity,and the influence of source water quality to water treatment process and drinking waterquality was usually neglected. In this paper, taking the source wells with poor quality onthe upper and middle reaches of the Yellow River as research object, the water qualitycharacteristics of shallow groundwater around the yellow river are researched. Thecoupling model of particular pollutants at waterworks-network department isestablished by Fourier Transform and Artificial Neural Network. The optimaldistribution model is established based on the control of particular pollutants, and thesoftware is developed correspondingly. The technology is applied to the distributionsystem of city Z, and the effectiveness and practicality of the model are verified.The precision of the simulation model of water supply network is relatively low,and the application range has certain limitations nowadays. In this paper, the dynamicsimulation modeling technology of opening territorial water supply network isresearched. Meanwhile, the precision of the simulation model can be improved throughsome technical means, such as developing parameter testing device with high-precision,adaptive adjustment of boundary flow in opening territorial water supply network, etc.On the basis of that, through analyzing the basic theory of water quality modeling, theanalysis calculation of typical quality indices such as residual chlorine, turbidity, iron ion and so on is realized. Furthermore, the Water Supply Network Safety Guarantee Platformis developed and applied in opening territorial water supply network of city J, theprecision of the simulation model is verified in the study.In the aspect of optimal operation of water supply system, the influence of watersource switching on quality in water supply network is always ignored. This paper takesthe water supply system with source switching on the middle and lower reaches of theYellow River as a research object, to analyze the causes and propose thecountermeasures of yellow water by mixing preparation experiment of two kinds offinished water which comes form yellow river and mountain reservoir respectively.Based on that, the objective function of multiple quality indexes is established withresidual chlorine and iron ion in mixing area as the control indices. Then the two-stageoptimal operation model is proposed, and the Optimal Operation Platform of UrbanWater Supply System is developed correspondingly. The model is solved byMulti-objective Evolutionary Algorithm NSGA-Ⅱ. The technology is applied in mixingarea of multi-source water supply system of city J, through optimal operationcalculating, the reliability and economy of water supply system are improved. The waterchemical-stability is enhanced and the occurrence probability of yellow water isdecreased at the same time.In this paper, intelligent optimization technologies such as the Genetic Algorithm,Multi-objective Evolutionary Algorithm, Artificial Neural Network and so on areapplied to optimal distribution of source water, simulation modeling of openingterritorial water supply network, and optimal operation of water supply system withmulti-source switching. In order to guarantee the quality safety, water supply reliabilityand economy, the water safety guarantee platform is established from source to network,which provides powerful technical support for scientific operation and management ofurban water supply system.