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Settlement Requirements and Diffusion of Three-phase Separation Centrifuge

Mar 17, 2018

The three-phase separation centrifuge is mainly used for centripetal acceleration when it is in use. In the middle of the device, the object with higher density is lower, and the object with smaller density will be in the upper part. When the operation is carried out, the suspension containing fine particles is kept quiet. When it is not in motion, there will be a gravitational field during operation, which will cause the suspended particles to gradually sink.

Three-phase separation centrifuges run faster, the heavier the particles, the faster they sink, and the smaller the density of the device than the liquid floats, the speed at which the particles move under the gravitational field and the size, shape, and density of the particles. It is related to, and is related to the strength of the gravitational field and the viscosity of the liquid.

The phenomenon of diffusion of the substances in the three-phase separation centrifuge in the process of sedimentation in the medium can also effectively occur, and the equipment is absolutely unconditional when it is diffused, and the diffusion of the equipment is inversely proportional to the quality of the material, under normal circumstances. The smaller the particles, the greater the diffusion.

The settlement of the three-phase separation centrifuge is also relative to a certain extent, conditional, to a certain extent to be subject to external forces to move, so that the weight of the settlement and the object will be proportional to a certain extent, which can be slightly greater The faster the settlement. For particles smaller than a few micrometers, such as viruses or proteins, they are colloidal or semi-colloidal in solution and it is impossible to observe the sedimentation process using only gravity.

The three-phase separation centrifuge is slower because the smaller the particles are, the more serious the diffusion phenomenon is. Therefore, it is necessary to use a centrifuge to generate a strong centrifugal force in order to force these particles to overcome the diffusion and produce a settling motion. Centrifugation is the use of the centrifugal force generated by the high speed rotation of the centrifuge rotor to accelerate the settling velocity of the particles in the liquid and to separate the sedimentation coefficient and the buoyant density of the material in the sample.