A centrifuge is a device that uses centrifugal force to separate fluid components of varying densities. Centrifuges are ideal for separating solids from fluids in applications such as sludge dewatering. The centrifuges work by spinning objects in a circle on a fixed pivot; this turning activity creates two spiral powers in the rotator, specifically Centrifugal and Centripetal Force.
Types of Centrifuges
When classifying types of centrifuges, you can consider their speed, method of activity, size, and power generation capacity. The initial step when deciding which machine is best for you is the choice between manual and programmed centrifuges.
Some factors to consider when choosing between manual and programed centrifuges include:
– Access to power
– Workload
– Time available
– Nature of substances to separate
Manual Centrifuges
Manual centrifuges require physical operators and regular inspection and removal of obstacles that impede optimal performance. Manual centrifuges fall into two categories:
- Hand-operated centrifuge
- Manually maintained centrifuges
-
Hand operated centrifuges
These centrifuges normally have a handle that is rotated manually to spin them into action. These hand-operated centrifuges don’t require a source of power to use and are useful for simple workloads that do not need a lot of force.
-
Manually maintained centrifuges
These types of centrifuges need manual cleaning and maintenance despite having electric motors. The electric motors generate strong forces capable of executing complex operations. Yet, cleaning this type of centrifuge can be time-consuming. As such, manually maintained centrifuges are not ideal for heavy workloads.
Automatic Centrifuges
Automatic Centrifuges can handle high operational capabilities on high speeds using electric motors and sensors. You can choose between automatic and semiautomatic centrifuges depending on your expected outcome, amount of work and, most importantly, your budget. Automation is ideal for continuous processing with large volumes when it is impossible and impractical to stop and clean on a frequent basis.
-
Semi automatic centrifuges
These depend on the type of solids in solution. The solids need to be of a soft gelatinous consistency, similar to a paste. The soft paste consistency allows the high g-force to push the solids into the cleaning discharge tube for extraction. Anything other than a soft paste will require the fully automatic centrifuge.
-
Fully automatic centrifuges
Fully automated centrifuges initiate operations automatically. They only require an operator to initially switch them on and off or can operate by a remote input, as long as there is a solution to process. Once started the system can operate on a standby process, turning on and off when reservoir volumes dictate processing. These centrifuges are best for a bigger workload and can operate with little supervision.
Mode of operation
This refers to how the centrifuge machine works. There are two major modes of operation of centrifuges which include Sedimentation or Filtration type.
-
Sedimentation centrifuges
They comprise a solitary control unit for the liquid where divergent power drives thick parts to settle at the base, and the fluid is depleted off occasionally. Sedimentation centrifuges are ideal for the separation of a suspension liquid by speeding up the normal settlement process. An example of a sedimentation centrifuge is the Decanter used in sludge dewatering.
-
Filtration centrifuges
Highly used in industrial filtration, this centrifuge has a partition in the liquid control unit with a perforated wall that has a channel or screen attached to it. The liquid streams out of the holder through the channel and the solids stay behind, whenever the divergent power is applied.
Other considerations for centrifuges include centrifuge size, configuration, speed, and diffusive fields, among others.
Get in touch with Interfil today to find the right centrifuge for your needs.
Read Also:
Centrifuges for Algae Harvesting
A General Overview of Various Centrifuges and Their Use