Intelligent coagulation chemical dosing control system for water plant and control method thereof
A control system and intelligent technology, applied in general control system, control/regulation system, self-adaptive control, etc., can solve problems such as inability to automatically adjust the dosage, and achieve the effect of preventing water quality accidents and advanced technical means
Active Publication Date: 2012-03-21
SHENZHEN KITEWAY AUTOMATION ENG
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Problems solved by technology
In the late 1980s, due to the failure of coagulation control technology to achieve breakthroughs, some water plants with imported technical equipment and a high degree of automation still adopted simple control technologies such as flow proportional control in the coagulation process, which cannot change with water quality. The automatic adjustment of dosage has become the "bottleneck" of water plant control technology
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[0034] The present invention will be further described below in conjunction with the accompanying drawings.
[0035] figure 1 It shows the principle block diagram of the intelligent coagulation dosing control system of the water plant, such as figure 1 As shown, the water plant intelligent coagulation dosing control system includes a feedback controller 4, a feedforward unit, an image acquisition and processing unit 5 and a decision execution unit.
[0036] Specifically, the water quality parameters of the raw water are used as the original signal I 0 , wherein the water quality parameters include the influent flow of raw water, water turbidity, water temperature, pH value and water alkalinity, and the water turbidity after sinking is set as the first input signal I 1 , the water turbidity after the sinking is the water turbidity of the water mixed after the dosing after precipitation; the feedback controller 4 is preferably a PID feedback controller 4, and the input of the ...
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The invention discloses an intelligent coagulation chemical dosing control system for a water plant. Water quality parameter of raw water is an original signal, and turbidity of post-sinking water is a first input signal. A front feed unit comprises a water quality evaluation device and a front feed controller which are sequentially connected, the input and the output of the water quality evaluation device are the original signal and a third output signal, the input of the front feed controller is the original signal and the third output signal, and the output of the front feed controller is a first output signal. The input of a feedback controller is a difference value of the first input signal and a preset value of the water turbidity, and the output signal is a second output signal. Animage collection processing unit comprises a flocculating constituent image collector and an image processing unit which are sequentially connected, and the output of the image processing unit is an average equivalent diameter of a flocculating constituent. A decision execution unit comprises a chemical dose corrector and a chemical dosing pump motor which are sequentially connected. The input ofthe chemical dose corrector comprises the first output signal, the second output signal and the average equivalent diameter of the flocculating constituent, and the output of the dose corrector is rotating frequency of the chemical dosing pump motor.
Description
technical field [0001] The invention relates to the field of automatic dosing in the water supply industry, in particular to an intelligent coagulation dosing control system for a water plant and a control method thereof. Background technique [0002] In the coagulation dosing process of the waterworks, how to reasonably determine the dosage of coagulant according to the change of raw water conditions (water quality, water volume) and the requirements of the turbidity of the sinking water to achieve optimal control, that is, to ensure the sinking water Under the premise of water quality, minimizing the consumption of coagulant and reducing the cost of water production have always been the key issues in the control of coagulation process. For this reason, many methods have been used for automatic control of coagulation dosing, such as beaker test method, flow ratio dosing method, mathematical model method, model filter method, single factor control method, etc. [0003] Amon...
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IPC IPC(8): G05B13/04C02F1/52
Inventor 宛如意罗家宏幸敏力吴江尚昭琪陈永洒李晓如叶德斌
Owner SHENZHEN KITEWAY AUTOMATION ENG