Laboratory techniques: brief centrifuge – centrifuge – Education .

Centrifuge is the use of centrifugal force, separating liquid and solid particles or liquid mixture with the liquid components of the machine, also known as centrifuges.HC Education NetworkCentrifuge is the use of centrifugal force, separating liquid and solid particles or liquid mixture with the liquid components of the machine, also known as Centrifuge .

Centrifuge is primarily used for the break of solid particles and liquid separately; or emulsion in two different densities, but also separate immiscible liquids (for example, to separate cream from milk ); it can likewise be exploited to find out the wet solids in the liquid, such as wet and dry clothes with a washing machine dumped; special speed control separator can separate mixtures of gases of different densities, such as concentration, separation of uranium hexafluoride gas; the use of different density or the sizing of the settling velocity of solid particles in liquids of different characteristics, some centrifuge also by the concentration of solid particles or particle size classification. A great amount of centrifuges used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment, and shipbuilding sectors.

Ancient China, people living with the rope, one end of the pot, holding a circle at the former end, rotating lashing pots, squeeze out the centrifugal force generated in the berry juice pottery, which is the rule of centrifugal separation early stage.

Industrial centrifuge was natural in Europe, such as the mid-19th century, has emerged with a three-textile dewatering centrifuge, and the crystallisation of sugar, sugar used in the separation of suspended centrifuge. The first batch centrifuges are operational and labor slagging of.

Institutions as dumping slag to amend the twentieth century, emerged 30 years continuous process of the centrifuge, centrifuge also due to intermittent operation to be developed to achieve the automatic control.

1879, the Swedish Laval invented the first separated from milk cream separators, drum it but a hollow cylinder. Later, to gain the axial superimposed drum conical disc, so that significantly improved separation and increased processing power, the Technology Progress led to the rapid growth of disc-type separator. Centrifuge speed is gradually behind the rapid development of the drum diameter also increases, improving the separation efficiency, improved processing power.

Industrial centrifuges, according to the construction and separation requirements, can be divided into filter centrifuge, centrifuge and separator three. Separator only for separation of low concentration suspensions and emulsions, including the disc separator, tubular separator and the separator chamber.

Centrifuges have a high speed around its axis of revolution of the cylinder, known as the drum, usually determined by the motor. Suspension (or emulsion) by adding after the barrel was driven rapidly with the race and drum rotation, the components below the centrifugal force separation, and were discharged. Typically, the higher drum speed, the best the separation.

Centrifuge principle role of centrifugal filtration and centrifugal sedimentation of two. Centrifugal filter is to break under centrifugal force field generated in the centrifugal pressure acting on the filter medium, so that the fluid into the strain through the filter medium, while solid particles are trapped in the filter medium surface, in place to achieve liquid - solid separation; centrifugal sedimentation is the use of suspension (or emulsion) the concentration of different components in the centrifugal force field the rule of rapid sedimentation layer, to achieve liquid - solid (or liquid - liquid) separation.

There is a quasi-experimental analysis with the separator, can be clarified liquid and solid particle concentration, or liquid - liquid separation, separation of particle size of 0.1 to 0.5 microns. For example commonly used test tube separator, its velocity is 3000 to 20000 r / min, loading equal number of satisfying to liquid put into a glass test tube rack or angular symmetry of the pockets of the rotor, the centrifugal force in vitro deposition of firm to liquid stratification. High-speed analysis of the isolated village of small-diameter drum machine. Such separators are atmospheric pressure, vacuum, freezing conditions, operation of the different structural types.

Centrifuge separation measure an important indicator of operation is the separation factor. It said the cloth was detached by centrifugal force suffered in the basket with the ratio of gravity, the greater the separation factor is normally the more rapid separation, separation the better. Industrial centrifuge separation is generally 100 to 20000 print run, speeding the separation tube separator print run of up to 62,000, of separator with speed up the interval of print run of 610,000. Decision capacity centrifuge drum, another component is the study area, large play area capacity is too large.

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