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Automatic control method for advanced treatment of water plant

An advanced treatment, water plant technology, applied in water treatment parameter control, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of increasingly high requirements and low popularity

Inactive Publication Date: 2021-05-11
SHANGHAI YUANDONG SCI & TECH
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Problems solved by technology

[0003] Although the domestic ozone contact oxidation + biological activated carbon filtration process is currently not very popular, the requirements for the latest water treatment standards are getting higher and higher. Therefore, in order to meet the requirements, advanced treatment of water plants is required, especially ozone contact oxidation + Practical application design and matching control method of biological activated carbon filtration process

Method used

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  • Automatic control method for advanced treatment of water plant

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specific Embodiment

[0030] On the basis of a large number of experiments, the present invention proposes a carbon filter comprehensive control method based on the dynamic PID adjustment technology of the filtered water quality index feedback, and completes the dynamic feedback micro-control of the advanced treatment, so as to improve the full adsorption of activated carbon and improve the performance of the carbon filter The goal.

[0031] Such as figure 1 Shown, the method step stage in the specific technical scheme comprises:

[0032] (1) Control principle of activated carbon filter

[0033] ① During normal filtration, the control subsystems of each filter grid automatically adjust the opening of the clean water valve according to the water level of the filter grid, and perform filtration at a constant water level of the filter grid to ensure that the turbidity of the effluent reaches the standard.

[0034] ②The main control platform automatically detects the flushing cycle time of each filte...

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Abstract

The invention relates to an automatic control method for advanced treatment of a water plant. The method comprises the following steps: 1, during normal filtration, acquiring and measuring a water level and a head loss of a filter tank in real time by a corresponding device, transmitting parameters to a PLC, and controlling the opening degree of a valve in the filter tank by a PID closed-loop control system in the PLC so as to realize constant-water-level automatic filtration; and 2, simultaneously and automatically detecting the washing circulation time of each filter cell in the filter tank, and appointing the corresponding filter cell to enter a backwashing process when the conditions are met so that the water flow residence time of the filter tank is kept in an optimal process state. Compared with the prior art, the method of the invention is the carbon filter tank comprehensive control method based on the dynamic PID adjusting technology of post-filtration water quality index feedback, dynamic feedback micro-control of deep treatment is completed, and the aims of improving sufficient adsorption of activated carbon and improving the performance of the carbon filter tank are achieved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to an automatic control method for advanced treatment of a water plant. Background technique [0002] The advanced treatment of drinking water is relative to the conventional treatment process of "coagulation-sedimentation-filtration-disinfection". The technologies mainly include ozone-activated carbon technology and membrane separation technology. Due to these high technical costs and other reasons, by 2012, 90% of domestic urban waterworks still use traditional technology, and advanced drinking water treatment technology needs to be promoted more. [0003] Although the domestic ozone contact oxidation + biological activated carbon filtration process is currently not very popular, the requirements for the latest water treatment standards are getting higher and higher. Therefore, in order to meet the requirements, advanced treatment of water plants is required, especially oz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05C02F1/00C02F1/28
CPCG05B19/058C02F1/001C02F1/283C02F2209/40C02F2209/42G05B2219/14006
Inventor 胡介民胡嘉宁
Owner SHANGHAI YUANDONG SCI & TECH
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