We often specify in the instruction manual or warning signs of the emulsifier: the emulsifier is strictly prohibited from idling, and the emulsification head must be immersed in the solution. Still many people don't understand why the emulsified head is immersed in the solution.
A high shear emulsifier is a process that efficiently, rapidly, and evenly moves one phase or phases (liquid, solid, gas) into another mutually incompatible continuous phase (usually a liquid). The principle is the high tangential speed generated by the high-speed rotation of the rotor and the strong kinetic energy brought by the high-frequency mechanical effect, so that the material is subjected to strong mechanical and hydraulic shear, centrifugal extrusion, and liquid layer friction in the narrow gap between the stator and the rotor. A combination of impact tearing and turbulence forms a suspension (solid/liquid), an emulsion (liquid/liquid) and a foam (gas/liquid). The part where the emulsification head is connected to the stator is provided with a bearing of a copper sleeve bearing or other material, and the rotation speed of the transmission shaft is generally 2880 rpm. Due to the relatively high speed movement between the copper sleeve and the drive shaft, the friction will generate extremely high temperatures. If there is no lubricant between the copper sleeve and the shaft, the copper sleeve and the shaft will expand due to the high temperature, thereby locking the copper sleeve and The shaft will be scrapped as a result. When the emulsified head is immersed in the solution, the solution will enter the gap between the copper sleeve and the bearing to provide lubrication and protect the copper sleeve and
Key words laboratory emulsifier, emulsification pump, laboratory disperser, static mixer
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