A water treatment chlorine addition control method and device

Abstract

The invention provides a method and device for controlling chlorine addition in water treatment, which are used for controlling chlorine addition on water treatment pipelines. At least three chlorine addition points and at least two residual chlorine test points are arranged on the water treatment pipeline. A residual chlorine test point is included between two adjacent chlorine addition points, and the method includes: obtaining the test residual chlorine amount corresponding to each residual chlorine test point; Whether the difference between the target residual chlorine amount corresponding to the chlorine test point and the corresponding test residual chlorine amount is greater than the first preset threshold; For each second chlorine addition point other than the chlorine addition point, the chlorine addition value of the second chlorine addition point is adjusted; if not, the chlorine addition value of the first chlorine addition point is adjusted. This scheme can improve the accuracy of chlorine addition control in the water treatment process.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a water treatment chlorine addition control method and device. Background technique [0002] In the process of water treatment, disinfection is a guarantee step for the biological safety of drinking water. At present, domestic drinking water disinfection processes are mostly chlorine disinfection processes. my country's drinking water standards stipulate that the free residual chlorine in factory water should not be less than 0.3 mg / L after 30 minutes of contact, and the end of the pipe network should not be less than 0.05 mg / L. Although the amount of residual chlorine still has the disinfection ability, it is still insufficient for the disinfection of re-pollution. During chlorination disinfection, the amount of chlorine input should generally meet the amount of chlorine required to kill bacteria to achieve the specified disinfection index and oxidize organic matter, as ...

AI Technical Summary

Problems solved by technology

[0003] At present, the chlorination process in the water treatment process is usually controlled by manual control or PLC system, but because the chlorination system has the characteristics of large inertia and large lag, its transition process and pure lag time are long, and the interference factors of the system are relatively large. Too much, so that the adjustment is more frequent and the control accuracy is poor, which leads to poor chlorine disinfection effect in the water treatment process

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