A decanter centrifuge is a drilling fluid solids control equipment, which employs a high rotational speed to separate components of different densities. This becomes relevant in the majority of industrial jobs where solids, liquids and gases are merged into a single mixture and the separation of these different phases is necessary. A decanter centrifuge separates solid materials from liquids in slurry and therefore plays an important role in wastewater treatment, chemical, oil and food processing industries. There are several factors that affect the performance of a decanter centrifuge and some design heuristics to be followed which are dependent upon given applications.
Decanter Centrifuge
What is the advantages and limitations of decanter centrifuge in current market?
Generally the decanter centrifuge has more advantages than disadvantages; however there are some limitations when compared to other processes.
Advantages:
Decanter centrifuges have a clean appearance and have little to no odour problems.
Not only is the device easy to install and fast at starting up and shutting down, but also only requires a small area for operation compared to other competitive processes.
The decanter centrifuge is versatile as different lengths of the cylindrical bowl section and the cone angle can be selected for different applications. Also the system can be pre-programmed with various design curves to predict the sludge type, while some competitive processes, such as a belt filter press, cannot change the belt type to operate for different sludge types. Its versatility allows the machine to have various functions such as operating for thickening or dewatering.
The machine can operate with a higher throughput capacity than smaller machines. This also reduces the number of units required.
The device is simple to optimise and operate as it has few major variables and reliable feedback information.
The decanter centrifuge has reduced labour costs compared to other processes, as it requires low continuous maintenance and operator attention.
Compared to some competitive process such as the belt filter process, the decanter centrifuge has more process flexibility and higher levels of performance.
Decanter Centrifuge
Limitations:
The decanter centrifuge cannot separate biological solids with very small density differences, such as cells and viruses. A competitive process that is capable of separating these difficult-to-separate solids is the tubular-bowl centrifuge.
The machine can be very noisy and can cause vibration.
The device has a high-energy consumption due to high G-forces.
The decanter centrifuge has high equipment capital costs. Hard surfacing and abrasion protection materials are required for the scroll to reduce wear and therefore reduce the maintenance of the scroll wear.
Features and Benefits of KOSUN Decanter Centrifuge:
1. Innovative design includes longer bowl for increased retention time, resulting in drier solids and finer cut points
2. Big bowl big volume, high G force available
3. Stainless steel bowl, scroll, compartment and cover resist corrosion and provide long service life.
4. Tungsten carbide scroll points with wide spacing flights at tapered end create a finer layer of conveyed solids for consistent, uniform separation and maximum solids control efficiency.
5. German FAG or Sweden SKF brand bearings
6. Electrical Components: SIEMENS/Schneider ATEX or IEC Ex for option.
7. Screw pump & centrifugal pump feeding pump option available to meet different application.
