Introduction :
Many businesses use a clarifier with a settling tank. where sediment particles and solids gradually fall down due to the force of gravity. However, such clarification is a very slow process with not very controllable results.
Decanter centrifuge uses centrifugal force to speed up the operation process. This effect can be up to 4000 times greater than the gravitational forces. The separation of solid from liquid can also be easily controlled by adjusting the rotation speed.
Decanter devices are used instead of filters in sedimentation to reduce costs (because filters are very expensive in small sizes) and also to reduce time instead of water and sewage treatment ponds and dairy cip. With this action, due attention is paid to saving money, time and the environment.
History of decanter:
In the 1950s, Alfalawal Company has experience in designing and manufacturing decanter devices. It has progressed a lot since 1950.
Decanter or grain collector:
A decanter or grain catcher is a device for separation that is used in the food, oil, water and sewage industries, etc
The difference between decanter and separator is in their separation size. Separation in the separator is based on microns and in the decanter based on millimeters
Centrifuge decanters of Alfa Laval company perform this important action of separating solids from liquids extremely well.
Efficiency criteria:
5 main factors determine the efficiency of decanter centrifuges:
* Centrifugal force required for separation and sedimentation of solid materials
* Clarification area necessary to trap solid materials
* Different speeds required to transfer solids out of the decanter
* Hydrodynamic design that determines the exact parameters for turbulent flow.
* Designing beach and conveyor parts that are important for transferring solid materials efficiently and effectively.
In using the decanter centrifuge for special applications, a series of special design considerations should also be considered:
* conveyor slope
* design of feeding area
* Beach angle
* Bowl surface
* Abrasion resistance
* Materials used in the construction of the machine.
main parts of the decanter 4 :
Entrance area
Spiral conveyor
Solid discharge section
Liquid discharge section