There are three main types of centrifugal equipment commonly used: blood centrifuges, pharmaceutical centrifuges and industrial centrifuges.
Blood centrifuges are mainly used in the medical field and are capable of separating different blood components such as hemoglobin, white blood cells, and platelets. Pharmaceutical centrifuges work on a similar principle as blood centrifuges, but their rotational speeds are usually higher than those of blood centrifuges to accommodate the more complex separation requirements of the pharmaceutical process. Pharmaceutical centrifuges are widely used in various aspects of the pharmaceutical field, such as drug research and development, separation and purification in the production process.
Industrial centrifuges are mainly used for separation processes in industrial production, such as sugar, salt, oil, etc. Industrial centrifuges are usually large in size, high in rotational speed, and high in separation efficiency, and are able to provide highly efficient and stable separation capacity. In addition to their application in traditional separation processes, industrial centrifuges are also commonly used in modern scientific fields such as the preparation of new materials and the separation of marine organisms.
Centrifugal Principle
When a suspension containing fine particles is left standing, the suspended particles gradually sink due to the action of the gravity field. The heavier the particle, the faster it sinks, and conversely particles that are less dense than the liquid will float. The speed of particles moving under the gravity field is related to the size, shape and density of the particles, and is also related to the strength of the gravity field and the viscosity of the liquid. Particles the size of red blood cells, a few micrometers in diameter, can be observed settling under the usual gravity.
In addition, the settling of substances in a medium is accompanied by diffusion. Diffusion is unconditional absolute, diffusion and the mass of the substance is inversely proportional to the smaller the particles the more serious diffusion. And settlement is relative, conditional, to be subjected to external forces in order to move. Sedimentation is directly proportional to the weight of the object, the larger the particle the faster the sedimentation. For particles smaller than a few microns, such as viruses or proteins, they are in solution into a colloidal or semi-colloidal state, the use of gravity alone is not possible to observe the settlement process.