How high speed dispersers work

The working principle of high-speed dispersing machine High-speed dispersing machine is mostly used for coating production, also known as paint dispersing machine. It consists of five parts: hydraulic system, main drive, stirring system, guiding mechanism and electric control box. The parts are compact and reasonable. Dispersing disc type: flat-disk serrated, three-finger paddle, disc and other forms. It is widely used in high-efficiency equipment for mixing and dissolving and dissolving paints and solids. It is widely used in chemical products such as coatings, inks, pigments and adhesives.
The main working part of the high-speed disperser is the impeller, which is commonly used with a sawtooth disc impeller. The impeller is driven by a high-speed rotating dispersing shaft.
The high speed rotation of the agitator leveler impeller causes the paint slurry in the agitation tank to exhibit a rolling circulatory tinplate and create a large vortex. The pigment particles on the top surface of the lacquer quickly spiral down to the bottom of the vortex. At the edge of the impeller 2. 5 ~ 5cm - belt, forming a turbulent zone. In this area, the pigment particles are subjected to strong shear and impact, allowing them to be quickly dispersed into the paint. Outside this area, the upper and lower streams are formed to allow the paint to be fully circulated and flipped through the conductivity meter. If the impeller is in a laminar flow state, the interaction between the liquid layers at different speeds is called the viscosity shearing force, which can achieve a good dispersion effect.

In summary, the high-speed disperser combines mixing and dispersion. In the initial stage of high-speed dispersing machine operation, the pigment is also piled on the paint. At this time, low-speed mixing and mixing should be adopted to prevent the powder dispersing machine from flying, and then increase the rotation speed to increase the dispersing ability. Practice has proved that when the circumferential speed of the end of the impeller must reach 20m/s or more, a satisfactory dispersion effect can be obtained, but it can be reduced to 15m/s when dispersing the expanded paint. However, the circumferential speed of the impeller should not be too high, otherwise the paint slurry will splash, causing the disk impeller to be exposed excessively, resulting in air intrusion, possibly destroying the laminar flow state formed under the impeller, reducing the dispersion efficiency and unnecessarily increasing the power consumption. . Generally, the maximum circumferential speed of the impeller is 25 to 30 m/s.

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