Granularity fractal dimension determination method for deciding optimal charging amount of flocculant for water treatment

Abstract

The invention relates to a method for determining the fractal dimension of the optimum dosage of flocculants for water treatment, and the invention relates to a method for detecting water treatment. It solves the problem that the conventional water treatment dosing control system cannot effectively control the dosage of flocculant and the optimal sedimentation water turbidity range in a timely manner. It detects 8 particle size channels online through the particle counter installed next to the reaction tank of the water plant. According to the detection value of the number of particles in the flocculated water sample, the particle size fractal dimension value Df is obtained by linear fitting according to the upper limit value D of the particle size range represented by each channel and the natural logarithm of the particle size distribution function P of each channel. The maximum value of Df corresponds to the optimal dosage of flocculant, and the corresponding sedimentation effluent turbidity is the optimal sedimentation effluent turbidity. The present invention uses a simple and feasible particle counting method to calculate the particle size fractal dimension value Df of flocs, and uses it as a real-time monitoring index for predicting the change of turbidity of sedimentation water, which can timely and effectively measure the optimal dosage of flocculant, greatly shortening the Detection lag time to avoid water quality accidents.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a detection method for water treatment. Background technique [0002] Flocculation is one of the most important links in water treatment, and its effect directly affects the treatment quality of subsequent treatment processes. The amount of flocculant is the decisive factor affecting the flocculation effect, and the amount that can make the turbidity of the sedimentation water the lowest, that is, the best flocculation effect is called the optimal amount. In the past, the flocculant dosage control in our country was all aimed at the "economic turbidity range". The flocculant dosage required by the turbidity is called the economic dosage. In the economic turbidity range, the turbidity of the precipitated water decreases significantly with the increase of the flocculant dosage, which is relatively easy to control. With the development of my country's national ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the conventional water treatment dosing control system cannot effectively control the optimal dosage of flocculant and the range of turbidity of the optimal precipitated water in time, resulting in blind dosing of flocculant and deterioration of effluent quality, and provides a water The fractal dimension determination method for the optimal dosage of flocculant, which can determine the optimal dosage of flocculant, is applied in the water treatment process, which is helpful to adjust the dosage in time and accurately to adapt to the raw water quality and operating conditions Changes, avoiding the precipitation water from the optimal turbidity to the opposite side, thus ensuring the stable operation of the process near the expected value, with high social and economic benefits

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