Is the higher the speed of homogenizer, the better?

  Homogenizer plays an important role in the mixing system of industrial equipment, especially in solid-liquid mixing, liquid-liquid mixing, oil-water emulsification, dispersion and homogenization, shear grinding. The reason why it is called emulsifying machine is to be able to realize the role of emulsification. After the complete mixing of oil-water two-phase medium, the emulsion can be divided into two systems: oil in water or oil in water. There are at least two requirements for emulsification. First, the dispersing effect of mechanical cutting is intense, and the liquid medium is cut at the same time with the oil phase and dispersed into small particles. The two is the appropriate emulsifier, which acts as a medium bridge between the oil and water molecules. Through the charge and intermolecular force, the emulsion can be stored in accordance with the time we need.

   The shear effect of emulsifying machine directly affects the final fineness. After analysis, it is mainly related to the sharpness of blade, hardness, clearance between rotor and stator, relative motion speed of two cutting edges and allowable particle size. Generally, the sharpness of blade, hardness, clearance between rotor and allowed particle size have been basically set or do not want to be changed The relative motion speed of the rotor is the most influential factor, which is shown as the circumferential speed of the rotor (because the stator is stationary). If the linear speed is high, the cutting or impact density of the radial flow fluid will be high, so the refining effect will be strong, and vice versa. However, the higher the linear velocity, the better. When it reaches a very high value, there is a tendency to block the flow (just like a warrior with high skill can turn his sword to resist the arrow coming from the target). Therefore, the flow rate becomes very small, and the heat is very high, and some materials will gather in turn, which makes the result not ideal.

  Is the stirring speed the shear speed? Those who have studied physics in senior high school know that the speed can be divided into angular velocity and linear speed. Shear speed of course refers to linear speed, and linear speed = angular velocity × diameter × π. Therefore, why is the rotational speed (angular speed) of industrial emulsifying machine generally only 3000rpm or 1500rpm, while that of laboratory emulsifying machine is 10000rpm or 1500rpm At 280000rpm, the diameter factor is taken into account, so that the shear line velocity of the two is close, and the final effect is close. From another point of view, the laboratory test is characterized by less quantity, so if the physical size of the rotor stator should adapt to the corresponding small amount, the diameter must be small. In order to make up for the negative impact of the small diameter on the linear speed, the angular speed of the rotor must be increased, thus forming the "high speed" of the experimental instrument.

It can be seen from the above that the rotation speed (angular speed) of the emulsifying machine should be considered in combination with the actual treatment capacity.