The type and structure of Filter centrifuge

Centrifugation is the use of the powerful centrifugal force generated by the high-speed rotation of the centrifuge rotor to accelerate the sedimentation velocity of the particles in the liquid, and separate the sedimentation coefficient and the buoyant density of the sample.

Filter centrifuge is a centrifugal separator that separates components in a suspension by centrifugal filtration. There are a number of holes in the wall of the filter centrifuge drum, and the inner surface of the drum covers the filter medium. The suspension added to the drum rotates together with the drum to generate a large centrifugal pressure. Under the pressure, the liquid in the suspension flows through the filter medium and the hole in the wall of the drum, and the solid is trapped on the surface of the filter medium, thereby realizing Separation of solids from liquids. The centrifugal force generated by the suspension in the drum is several hundred times that of gravity, which enhances the filtration process, speeds up the filtration, and obtains a filter residue having a lower moisture content. Suspensions of solid particles greater than 0.01 mm are typically filtered using a filter centrifuge.

                                              Herexi Fliter centrifuge TD5-1

Filter centrifuge is a new type of laboratory routine equipment widely used in chemical, pharmaceutical, metallurgy, mineral processing, salt, light industry, paper, food, bioengineer, petrochemical, textile and environmental engineering departments. For the working principle and structure of this type of centrifuge are very simple, it is also very affordable in terms of price. 


Nameame: Filter centrifuge/ perforated wall centrifuge

Nature: Centrifuge

Attribute: Filter

Centrifugal filtration method: centrifugal separator for separating components in suspension


There are many types of filter centrifuges. The main models are:

1. Three-legged filter centrifuge.

2. Flat filter centrifuge.

3. Horizontal filter centrifuge.

4. Vertical filter centrifuge.

The type of filtration depends on the type of centrifuge. Common ones:

1. Screen/rolling filter centrifuge.

2. Push filter centrifuge.

3. Reverse the filter centrifuge.

4. Pendulum filter centrifuge.


Principle of filter centrifuge:

The centrifugal force principle is used to separate two materials of different densities, or a solid-liquid mixture, to obtain a desired material. When the suspension containing fine particles is left stationary, the suspended particles gradually sink due to the action of the gravitational field. The heavier the particles, the faster the sinking, whereas the particles with a lower density than the liquid will float. The rate at which particles move under the gravitational field is related to the size, morphology, and density of the particles, and is related to the strength of the gravitational field and the viscosity of the liquid. Particles of the size of red blood cells, a few micrometers in diameter, can be observed under normal gravity.


In addition, the substance is accompanied by a diffusion phenomenon when it settles in the medium. Diffusion is unconditional and absolute. The diffusion is inversely proportional to the mass of the material, and the smaller the particle, the more severe the diffusion. The settlement is relative, and if it is conditional, it must be subjected to external forces to move. The settlement is proportional to the weight of the object, and the larger the particle, the faster the sedimentation. For particles smaller than a few micrometers such as viruses or proteins, they are in a colloidal or semi-colloidal state in solution, and it is impossible to observe the sedimentation process by gravity alone. The smaller the particles, the slower the sedimentation, and the more severe the diffusion phenomenon. Therefore, it is necessary to use a centrifugal machine to generate a strong centrifugal force in order to force these particles to overcome the diffusion to produce a settling motion.


The general structure of a filter centrifuge is:

There are many filter holes on the drum wall. It must be used with filter cloth (unless it is dehydrated by textiles without adding filter cloth), so the application of filter cloth or filter bag on filter centrifuge is very extensive and important. The motor is used to drive the drum to rotate, thereby separating and dewatering. The centrifuge is filtered, the drum is perforated and a filter, such as a filter cloth, wire mesh or sieve, is inserted, and the suspension flows through the filter and the drum from the inside to the outside, in such a manner that the solid material can be filtered out.


Herexi filter centrifuge TD5-1 main features:

1. Set several functions of washing, drying, dehydration, concentration and filtration;

2. TFT true color large screen touch LCD, intelligent control, simple and convenient operation, de-interpreting the panel, and simultaneously display setting parameters and operating parameters;

3. Speed and time are randomly set to meet the requirements of each stage;

4. Filter centrifuge, equipped with vibration damping device, automatic balance & low noise;

5. Mechatronics silent door lock.

6. Solved the problem of pressure filtration and low vacuum filtration efficiency;

7. Filter centrifuge, all stainless steel window, strong corrosion resistance;

8. Beautiful appearance, light weight and high efficiency;

9. Dryness is over 90%.