Working process and structural characteristics of two phase separation decanter

- Jun 19, 2019-

The two phase separation decanter is a centrifuge used to carry out the separation process during operation, and is also referred to as a "separator" when it is used. The working principle is the same as that of the decanter centrifuge, and the separation effect is better.


The two-phase separation centrifuge can be divided into a tube centrifuge and a disc centrifuge. Their use in the food industry occupies a prominent position. Tube centrifuges are commonly used for the dehydration of animal and vegetable oils and the clarification of liquids such as juices and syrups. Disc centrifuges are widely used in the dairy industry for cream separation and decontamination of milk.


When the two-phase separation centrifuge separates the emulsion of the liquid-liquid system and the solid-liquid suspension of the extremely fine particles, it needs a great centripetal acceleration to generate sufficient inertial centrifugal force to separate it, which requires the centrifuge to be Has a very high speed. The centrifugal pressure of the drum wall is proportional to the square of the drum radius, and is also proportional to the square of the rotational speed. In order to generate a very high rotational speed, and the drum wall does not cause excessive stress, a small diameter drum is required. Separate centrifuges have this structural feature.


Commonly used two-phase separation centrifuge


(1) Disc separator, also known as "conical bowl lid centrifuge". A plurality of conical discs which are spaced apart from each other are placed in the drum for liquid phase clarification or solid phase concentration and separation of the emulsion containing a suspension having a small amount of solid phase.


(2) Tube separator, also known as "tube high speed centrifuge". The drum has small diameter, high height and good separation effect, and is suitable for treating emulsions and suspensions which are difficult to separate. It is commonly used for the separation of oil, water, microorganisms and proteins, as well as the clarification of essential oils and nitrocellulose.


(3) Chamber separator. Inserting a plurality of concentric cylindrical partitions into the drum, dividing the rotating drum into a plurality of small chambers, the separated suspension enters from the center, flows through the chambers in sequence, and discharges the separated liquid from the outer layer, the solid phase The particles settle in each chamber and are suitable for the treatment of difficult to separate, low concentrations of suspensions and emulsions.