Online detecting method for water treating flocuclation effect particle counting dimension
A detection method, particle counting technology, applied in the direction of individual particle analysis, particle and sedimentation analysis, measuring devices, etc., can solve the problems of narrow adaptation range, inability to accurately reflect the dynamic change process of flocs in water, long lag time, etc., and achieve improvement Water production rate, extended backwash cycle and filter material life, and enhanced dynamic characteristics
Inactive Publication Date: 2009-08-19
HARBIN INST OF TECH
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[0003] The purpose of the present invention is to solve the problems that conventional water treatment flocculation effect detection methods cannot accurately reflect the dynamic change process of flocs in water, long lag time, narrow adaptability, etc., and provide a water treatment flocculation effect particle counting fractal online detection method. The method breaks through the limitations of the traditional flocculation image fractal dimension detection method, and uses a particle counter to detect the flocculation reaction effect based on the true size and quantity distribution characteristics of micro-floc particles in water. This is a new concept and detection method in this field. In the process of water treatment, it can promote the optimal control of the flocculation and dosing process, which has high social and economic benefits
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[0006] Specific implementation manner one: such as figure 1 As shown, this embodiment detects the flocculation effect of water treatment online according to the following methods: (1) Install an online particle counter near the static mixer of the water plant; (2) Take the medicine completely from the pipe from the static mixer to the entrance of the reaction tank The mixed micro-flocculated water samples are continuously tested; (3) A particle counter is set to detect 8 particle size channels online, and the particle size range values represented by each channel are: channel 0=2~10μm, channel 1=10~20μm , Channel 2 = 20 ~ 30μm, channel 3 = 30 ~ 40μm, channel 4 = 40 ~ 55μm, channel 5 = 55 ~ 70μm, channel 6 = 70 ~ 85μm, channel 7 = 85 ~ 100μm; (4) take each channel Particle count detection value N (particle count / ml): N 0 , N 1 , N 2 , N 3 , N 4 , N 5 , N 6 , N 7 ; (5) Take the upper limit of the particle size range represented by each channel H (μm): H 0 =10, H 1 = 20, H 2 = 30, ...
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The invention discloses a particle counting fractal dimension online detection method for water treatment flocculation effect, relating to a water treatment detection method. In order to solve the problems that the conventional water treatment flocculation effect detection method cannot accurately reflect the dynamic change process of flocs in water, the lag time is long, and the adaptation range is narrow, the steps of the present invention are: install a particle counter in the water plant to detect 8 particle diameter channels online The number of micro-flocculation water sample particles is calculated according to the detection value N of each channel, the median particle size D of each channel and the total particle value P to obtain the average particle size value M, which is calculated by the average particle size value M and the particle size standard deviation value A The counting fractal dimension value E reflecting the fractal structure characteristics of the microfloc was obtained. The present invention uses a simple and feasible particle counting method to calculate the counting fractal dimension value E of micro flocs, and uses it as an evaluation index for detecting the flocculation effect of water treatment, which greatly shortens the detection lag time and enhances the authenticity and accuracy of detection , save the dosage of chemicals and improve the water quality assurance rate.
Description
Technical field [0001] The invention belongs to the field of environmental protection and relates to a water treatment detection method. Background technique [0002] In the production process of water treatment, the perfection of particle flocculation directly affects the treatment effect of subsequent processing units such as precipitation and filtration. Because flocculation is a system with large lag in the ash box, traditional modeling methods often cannot obtain timely and accurate quantitative information about the flocculation process. The streaming current detection technology that has been developed and widely used is only applicable to conventional electrolyte coagulants, and cannot be directly used for the detection of the flocculation process of adding non-electrolyte polymer flocculants. The light transmittance pulsation detection technology that appeared at the end of eighty years can detect the particle size changes of particulate matter in water on-line, but its ...
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IPC IPC(8): G01N15/12G01N15/14
Inventor 南军
Owner HARBIN INST OF TECH