The working principle and application of high pressure homogenizer
The high-pressure homogenizer uses a high-pressure reciprocating pump . For the power transmission and material handling mechanism, the material is sent to the working valve. To handle the material passing through the working valve, it generates strong shear, impact and cavitation under high pressure,Ultrasonic Extraction Machine so that the liquid material or liquid-borne solid particles are ultra-micronized.
When the material has not passed the working valve, the valve core and the valve seat of the first-level homogenizing valve and the secondary emulsifying valve are closely attached under the action of the forces F1 and F2. When the material passes through the work valve, the valve core and the valve seat are forced by the material to squeeze a slit, and pressures P1 and P2 are respectively generated to balance the forces F1 and F2. When the material passes through the first-stage homogenizing valve , the pressure suddenly drops from P1 to P2, which is a sudden release of this pressure energy. It consists of the valve core, the valve seat and the impact ring.
The intense cavitation effect similar to the explosive effect is generated in a narrow area, accompanied by the shearing effect of the material passing through the slit between the valve core and the valve seat and the high-speed impact generated by the impact with the impact ring. , so that the particles get ultra-fine. In general, the pressure of P2 (ie, emulsification pressure) is adjusted to be very low, and the role of the secondary emulsion valve is mainly to make the particles that have been refined more evenly distributed. According to the data from the US Gaulin Corporation, in most cases, the ideal effect can be achieved by using a single-stage homogeneous valve.
Compared to centrifugal dispersion and emulsification equipment , high pressure homogenizer is characterized by: more detailed refinement. This is because the valve plug and the valve seat of the working valve are in close Ultrasonic Extraction Machine contact with each other at the initial position, but only a slit is forcibly extruded by the feed liquid during operation; while the rotating stator of the centrifugal emulsifying equipment meets the high speed requirement. Rotate and do not generate excessive heat, there must be a larger gap ; at the same time, because the drive mechanism of the homogenizer is a positive displacement reciprocating pump, theoretically, the homogeneous pressure can be infinite Improve, and the higher the pressure, the better the refinement effect.