Method for carrying out quantitative classification and qualitative analysis on flocculating constituent
A technology for quantitative analysis and flocculation, which is used in the analysis of materials, flow characteristics, measuring devices, etc., and can solve problems such as the inability to effectively reflect the spatial shape of flocs
Inactive Publication Date: 2014-06-25
DALIAN UNIV
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Problems solved by technology
These analyzes characterize the size or compactness of flocs, but cannot effectively reflect the spatial morphology of flocs
Method used
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Experimental program
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Embodiment Construction
[0027] The apparent viscosity of the solid-liquid suspension system formed by calcium oxide powder and water after flocculation treatment was measured with a rotary rheometer, and the data processing was carried out to the measurement results according to the model proposed by the present invention, and the different viscosity in the solid-liquid system after flocculation was obtained. The relative content of types of flocs is shown in Table 1 (measurement conditions: drum rheometer model: DV-III type; rheometer drum speed: 100rpm; average particle size of calcium oxide powder: 4.5μm; calcium oxide concentration V / V: <0.08; system temperature: 20°C; flocculant: polyacrylamide with a molecular weight of 8 million).
[0028] Table 1: Measurement results
[0029] f 1
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Abstract
The invention discloses a method for carrying out quantitative classification and qualitative analysis on a flocculating constituent. The flocculated floccules are divided into the following four types according to the spatial form: individual particles, linear floccules, planar floccules and body floccules, and all possible spatial forms are included in the four types of floccules. The apparent viscosity of a solid-liquid system is superposition of contribution of different shapes of floccules to the viscosity after flocculating, and the mathematic model is: Eta= Eta0+Eta1(x)+Eta2(x, DL)+Eta3(x, DA)+Eta4(x, DV). By adopting the method, the problem of qualitative analysis of different types of floccules, which cannot be solved all the time is solved, and a new path is provided for evaluation and control of the flocculating effect.
Description
technical field [0001] The invention belongs to the fields of colloid chemistry and chemical engineering, and in particular relates to a method for qualitative analysis and quantitative measurement of floc types. technical background [0002] In many industrial fields such as chemical industry, mining, sewage treatment, etc., it is often necessary to accelerate the sedimentation process of fine particles in the solid-liquid system. For this reason, the aggregation of fine particles can be achieved by adding electrolytes or polymer substances to the solid-liquid system. Adding an electrolyte can reduce the surface potential of the particles, so that the electric repulsion between the particles is reduced and the attraction is dominant. This method is also called cogulation (cogulation); adding polymer substances can form a "bridge" between the particles to make it Aggregation, this method is called flocculation (flocculation). In actual operation, the above two methods can b...
Claims
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IPC IPC(8): G01N11/00
Inventor 徐继润丁仕强
Owner DALIAN UNIV