Inside Look: Understanding the Working Principle of a Vacuum Emulsifier

Inside Look: Understanding the Working Principle of a Vacuum Emulsifier

In the field of cosmetic equipment, a vacuum emulsifier is a complex non-standard mechanical device. As the name implies, vacuum emulsification refers to the use of a high-shear emulsifier to quickly and evenly distribute one or more phases under vacuum. In the other continuous phase, the strong kinetic energy brought by the machine is used to make the material withstand hundreds of thousands of hydraulic shears per minute in the narrow gap between the stator and the rotor. It is especially suitable for emulsifying and homogenizing machinery and equipment for mixed liquids that are indispensable in the fields of food, beverage, chemical, biochemical, petrochemical, pigment, dye, paint, and pharmaceuticals. Centrifugation , extrusion , impact , tearing and other comprehensive effects can evenly disperse and emulsify in an instant, and after high-frequency cycles, finally obtain a fine and stable high-quality product without bubbles.

In industry, the application of emulsifier is not limited to emulsification. The emulsifier has a strong shearing effect, which can break the powder under the impact of destruction, and finally refine it to a fine particle size, and then fully mix the solid particles into the liquid to form a relatively stable suspension. When the fineness of the material reaches the micron or even nanometer level, the system can be considered homogeneous.

The shearing head is composed of a rotor and a stator, the rotor and the stator mesh with each other, and each stage of the stator and rotor has several layers of ring gears. The high-speed rotation of the rotor generates a strong centrifugal force, forming a strong negative pressure area. The material is sucked into the working chamber, and is subjected to comprehensive effects such as shearing, centrifugal extrusion, impact tearing and turbulence in the gap between the stator and the rotor, resulting in the tension of splitting droplets. . After the liquid leaves the stator orifice, the pressure rises again, which creates the cavitation effect. The homogenizing head rotates at high speed to shear, disperse and impact the material. In this way, the material will become more delicate and homogeneous. The working diagram of the high-shear dispersing (radial flow) homogenizer is used to illustrate:

The core structure of the high shear mixing emulsifier is the stator and rotor system. The most important thing about the mixer is how to choose the type. Different mixer structures will affect the mixing results and efficiency . In practical applications, different types of mixing blades should be combined according to needs and possibilities to form various targeted mixing systems: