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The Coagulant Dosage Automatic Control System Based on Mathematics Model

Author: LiuZeHua
Tutor: JiangShaoJie
School: Chongqing University
Course: Environmental Engineering
Keywords: Coagulation Dosing Automatic control system Streaming current Related Return Jar test
CLC: TU991
Type: Master's thesis
Year: 2002
Downloads: 190
Quote: 0
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Abstract


Dosing for water treatment process is a vital link, and how to achieve long automated dosing the water supply industry is one of the topics of great concern. Due to the raw water turbidity, PH value, with a water flow of raw water temperature and other water pollution, dosing flocculation process is a very complex reaction process for the realization of drug delivery systems to automate and reduce coagulant consumption rate, domestic and quite a lot research institutions and universities conducting dosing mechanism and automated processing research, the main current flow cytometry method (SCD), on-site simulation, mathematical models show flocculation Control Act (FCD France), such as automatic dosing methods of research and experiment. Through access to a large number of domestic and foreign literature, in-depth analysis and comparison of several domestic and international focus on the automatic dosing control, combined with many years in Chengdu No.6 Water Plant automation dosing practice and exploration experience, in this paper identifies Applied Mathematics Dosing automated systems modeling objective of this topic. This paper describes the mathematical model Liu Chang automatic dosing system to establish the whole process and research results. (A) select suitable Liu Chang raw water quality conditions basic aluminum chloride coagulant materials, reduce the drug-specific effect on the impact of dosing. (2) establish PLC control network, the computer automatically collect and store water quality parameters function analysis of the model established for the provision of adequate data resources. (3) established a perfect dosing hardware systems, such as the selection of turbidity, flow meters and metering pumps and other key equipment for the realization of automatic control of drug delivery systems to provide the necessary equipment base. (4) through a jar test test raw data, identify the impact of dosage to be due; then through correlation and regression data analysis methods for the analysis of each variable, the establishment of third-order equation as the core of the mathematical model. (5) Finally, the PLC and RSVIEW software programming system control processes and interactive computer graphics interface monitoring capabilities. Liu Chang mathematical model to achieve automatic dosing after sedimentation tank effluent turbidity in ensuring the case of coagulant consumption rate has been reduced significantly, to achieve the desired results. Precipitation water turbidity pass rate increased from 83.42% to 92.23%, the annual average increase of 8.81 percent. The system has become the current domestic rare truly automatic dosing system, its operation rate of 99.8% or more. Water experts during a visit to the United Kingdom Yue Hanxia understand the operation of the system after that it has reached international advanced water equivalent.

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works )
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