When I went to donate blood last month, my curiosity drove me to talk to a nurse about the machine that separates plasma from blood cells: the centrifuge. It works at high speed, sinking cells from the blood to the bottom of the centrifuge tube, leaving clear plasma at the top. Then I indicated that I would like to know about the different classifications of centrifuges. She said I could learn about the decanter centrifuge, a very common one, so I'm going to share it with you.
Decanter centrifuges compete with other separation technologies such as filter presses, screw presses, etc. While all of these devices have advantages, decanter centrifuges also have some specific advantages. The following is a list of the advantages of decanter centrifuges over filtration methods.
Decanter centrifuges work by applying a high centrifugal force to a solid and liquid slurry. The rotating conveyor belts push out the heavier solids that have settled on the decanter walls. The lighter fluid leaves the decanter through a liquid outlet at the other end of the drum.
The drum has a concentric vortex which rotates at a different speed from that of the decanter drum. This speed difference allows the vortices to transport separated sludge.
The figure below shows a cross-section of a typical decanter centrifuge.
1. Process adaptability:
Decanter centrifuges can easily handle product changes. They produce consistent separation results even at different flow rates. These centrifuges can handle process fluid mixing changes without degrading the final product quality.
2. Compact size:
The decanter centrifuge has a smaller footprint than a belt filter press of similar capacity. This small size allows the decanter centrifuge to be installed in a small space.
3. Airtight design:
The basic design of a decanter centrifuge consists of a rotating bowl in an enclosed chamber. This design prevents odors and other undesirable fumes and gases from contaminating the operating space.
4. Low labor costs:
Separating the fluid through the decanter is a virtually automatic process. This process requires minimal manual attendance service, thus reducing the associated labor costs.
5. Long service life:
Rugged design and construction are the main features of the decanter centrifuge. In addition, the high quality structural materials help the decanter centrifuge operate reliably for long periods of time.
6. Easy and quick installation:
The decanter centrifuge system is self-contained and therefore easy to install. The speed and ease of debugging enables them to increase productivity in a short period of time.
7. Three-phase separation:
In addition to separating solids from liquids, three-phase decanter centrifuges (triangulators) can separate immiscible liquids. This separation occurs simultaneously with the separation of solids.
8. Easy adjustment of stage:
Decanter centrifuge users can quickly and easily adjust sludge dryness or centrifuge clarification. This ease of phase quality adjustment is an added benefit that filtration equipment lacks.
Compared with other solid-liquid separation equipment, decanter centrifuge has some disadvantages. Here is a list of the major restrictions.
1. Money expenditures:
Decanter centrifuges cost more than filters and similar separators. Performance improvements and wear prevention options add further to this cost.
2. Separation of light particles:
Centrifuges use the difference in specific gravity between solids and liquids to separate. When solids (such as biological cells) have a specific gravity close to that of liquids, the decantometer cannot separate them.
3. Power requirements:
A high-horsepower motor powers the decanter centrifuge. These drive motors require a higher operating current than the filter.
4. Noise and vibration
Decanter centrifuges have heavy rotating bowls. The rotation of the weight causes vibration, which creates noise. These centrifuges can produce noise levels in the range 70-80 dB.
If you want a reliable centrifuge supplier, follow us. Huada holds a dominant position in the domestic centrifuge market, which to a great extent is attributed to its leading role (leading both users and peers). Although it has a number of new products and new technologies, it is not content with having centrifuges meet the separation requirements in the initial use.
