The deaeration principle of centrifugal deaerator
Issuing time:2022-02-25 16:19Author:HonMa
The deaeration principle of centrifugal deaerator Various industrial colloids always produce certain bubbles during the preparation process. In order not to affect the use of the colloid, it is necessary to remove the air bubbles. The usual practice is to defoaming by a centrifuge. Centrifugal defoaming machine is to use centrifugal method to separate out the air bubbles in the material with the help of centrifugal force. When the material rotates at a high speed in the centrifugal defoaming machine, centrifugal force is generated, and this centrifugal force separates the material from the air bubbles in it, and finally achieves the effect of defoaming.principle: When a suspension containing fine particles sits still, the suspended particles sink due to the action of the gravitational field. The heavier the particle, the faster it sinks, whereas the particle with less density than the liquid will float up. The speed at which particles move in a gravitational field is related to the size, shape, and density of the particles, as well as to the strength of the gravitational field and the viscosity of the liquid. Particles the size of red blood cells, with a diameter of several micrometers, can be observed to settle under normal gravity. The subsidence is relative and conditional, and it needs to be subjected to external force to move. The sedimentation is proportional to the weight of the object, and the larger the particle, the faster the sedimentation.For particles smaller than a few microns, such as viruses or proteins, they are in a colloidal or semi-colloidal state in solution, and it is impossible to observe the sedimentation process only by gravity. Because the smaller the particles, the slower the sedimentation, and the more serious the diffusion phenomenon. Therefore, it is necessary to use a centrifuge to generate a strong centrifugal force to force these particles to overcome the diffusion to produce sedimentation movement.In addition, when the substance settles in the medium, it is accompanied by the phenomenon of diffusion. Diffusion is unconditional. Diffusion is inversely proportional to the mass of the substance, and the smaller the particles, the more serious the diffusion. Centrifugation is to use the strong centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation speed of the particles in the liquid, and separate the substances with different sedimentation coefficients and buoyancy densities in the sample. The magnitude of the centrifugal force depends on the angular velocity of the centrifugal rotor and the distance of the material particles from the mandrel. When the material rotates at a high speed in the machine, under the action of centrifugal force, the specific gravity separation movement along the vector direction and the upward pushing action produced by the material's own weight separate the air bubbles and the like.