Granularity fractal dimension determination method for deciding optimal charging amount of flocculant for water treatment
A determination method and flocculant technology, which are used in particle size analysis, flocculation/sedimentation water/sewage treatment, particle suspension analysis, etc. It can improve the safety, avoid water quality accidents, and shorten the detection lag time.
Inactive Publication Date: 2006-12-27
HARBIN INST OF TECH
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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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specific Embodiment approach 1
[0006] Specific implementation manner one: such as figure 2 As shown, this embodiment is implemented according to the following steps: 1. Set up an online particle counter next to the reaction tank of the water plant; 2. Take the flocculated water sample 5-10 minutes from the inlet of the reaction tank and send it to the particle counter for continuous detection ; 3. Set up a particle counter to detect 8 particle size channels online, and the range of particle size values measured by each channel are: channel 0 = 2 ~ 5 μm, channel 1 = 5 ~ 10 μm, channel 2 = 10 ~ 20 μm, channel 3 =20~40μm, channel 4=40~80μm, channel 5=80~160μm, channel 6=160~320μm, channel 7=320~640μm; Fourth, take the particle count detection value of each channel N (particle number / ml) : N 0 , N 1 , N 2 , N 3 , N 4 , N 5 , N 6 , N 7 ; Fifth, take the upper limit of the particle size range measured by each channel D (μm): D 0 =5, D 1 =10, D 2 = 20, D 3 = 40, D 4 = 80, D 5 = 160, D 6 = 320, D 7 =640; VI. The part...
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The invention relates to a method for measuring the graininess of flocculant, used in water treatment, wherein it uses the particle calculating instrument in the react pool of water plant to online detect the flocculant water sample particle amount of eight particle channels; based on the upper limit D of diameter and the natural logarithm of graininess distribution function P of each channel to process linear fitting to obtain the graininess dimension value Df; the maximum value of Df is relative to the best amount of floculant; the relative deposit water turbidity is the optimized deposit water turbidity. The inventive method is simple, which uses DF as the real-time detect index, to test the best position of flocculant, to shorten the detect delay time.
Description
Technical field [0001] The invention belongs to the field of environmental protection, and specifically 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 dosage of flocculant is the decisive factor affecting the flocculation effect, and the dosage that can make the precipitation water turbidity lowest, that is, obtain the best flocculation effect, is called the optimal dosage. In the past, the control of flocculant dosage in my country was aimed at the "economic turbidity range". The economic turbidity range is determined by specific conditions and does not represent the lowest sediment effluent turbidity, which is generally much higher. The amount of flocculant required for this turbidity is called the economic amount. In the economic turbidity range, the turbidity of the precipitation effl...
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IPC IPC(8): G01N15/02G01N15/06C02F1/52
Inventor 南军
Owner HARBIN INST OF TECH