Centrifugal decanters for plastic recycling
In plastic recycling, the cleanliness of recovered material is crucial to its commercial value and the quality of the recycled product. Process water from the washing and grinding phases carries sand, pigments, glues, microplastics, and organic residues that must be removed effectively and continuously. CBB Decanters are the ideal industrial solution for optimizing this critical phase, improving the quality of treated plastics, and reducing operating costs related to processing residue management.
Industrial process
The mixture from the washing and grinding stages enters the high-speed rotating cylindrical-conical drum, where centrifugal force quickly and efficiently separates the solid phase, contaminants, sediments, and unwanted particles, from the liquid phase. The internal screw, operated at differential speed, conveys the solids to the drain, ensuring continuous evacuation without buildup, while the clarified product is extracted from the other end of the drum with a regular and constant flow. The flexibility of the operating parameters allows the separation process to be adapted to the different types of plastics being treated, optimizing the quality of the outgoing water and reducing the load on downstream filtration and treatment systems.
CBB Decanter Technology
CBB Decanters for plastic recycling are built to handle highly variable slurries, where abrasive materials, heterogeneous residues, and changing solids concentrations can challenge process stability. The bowl geometry ensures uniform settling even with low-consistency mixtures, while the screw profile ensures continuous and precise solids management without compromising plant productivity. Integrated control systems adjust flow rate, torque, and differential speed in real time, allowing the machine to automatically respond to material variations. Abrasion-resistant materials, protective coatings, and reinforced components in high-stress areas ensure long operating life and reduced maintenance costs.
Advantages of centrifugal separation
- High separation efficiency even with complex plastic suspensions.
- Improved clarified water quality and reduced impurities.
- Greater effectiveness of washing and material recovery processes.
- Continuous 24/7 operation with minimal supervision.
- Reduction of disposal costs and greater process stability.
Frequently Asked Questions
They separate solids, microplastics and wash water, improving the quality of the material recovered in recycling processes.
They increase the purity of the treated material and reduce the costs of managing contaminated water during the process.
Yes, they work with high solid content suspensions maintaining stability and operational continuity even in critical conditions.
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