1 Form of emulsification head (batch and continuous) (continuous is better than batch)
2 The shear rate of the emulsification head (the bigger the better, the better)
3 The tooth structure of the emulsification head (divided into primary teeth, middle teeth, fine teeth, superfine teeth, the better the fine teeth effect)
4 The residence time of the material in the dispersion wall, the emulsification dispersion time (can be regarded as the same motor, the smaller the flow rate, the better the effect)
5 The number of cycles (the more, the better the effect, the time limit for the device, it can't be better)
Line speed calculation
The shear rate is defined as the relative velocity of the liquid layer between the two surfaces.
– Shear rate (s-1) = v rate (m/s)
g stator-rotor spacing (m)
As can be seen from the above, the shear rate depends on the following factors:
– the linear rate of the rotor
– The distance between the two surfaces in this case is the rotor-stator spacing.
IKN stator-rotor spacing ranges from 0.2 to 0.4 mm
Rate V = 3.14 XD (rotor diameter) X speed RPM / 60
The high rotational speed and shear rate of ultra-high speed dispersion homogenizers are of the utmost importance for obtaining ultrafine suspensions. According to the special requirements of some industries, the company has developed the ERX2000 ultra-high speed shear emulsifier machine based on the ERS2000 series. The shear rate can exceed 200.00 rpm and the rotor speed can reach 66 m/s. In this speed range, the turbulence caused by the shear force combined with the specially developed motor can make the particle size range as small as nanometer. The shear force is stronger and the emulsion has a narrower particle distribution. Due to the extremely high energy density, no additional auxiliary dispersing equipment is required, and the particle size at 400 BAR pressure of a conventional high-pressure homogenizer can be achieved.
Among domestic and foreign products, 66m/s is already among the ultra-high speeds. Shanghai Yiken has a very strong design strength.
Concerned about surprises
Label: The factors affecting the results of dispersion emulsification are as follows
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