Discharge Systems
In high-viscosity mixing, a discharge system is a specialized mechanism used to push highly viscous materials out of a mixing vessel or drum after the process is complete. Because thick substances like pastes, polymers, or heavy gels do not flow freely under gravity, these systems use mechanical pressure to ensure efficient material recovery.
Key Components and Functions:
- Follower Plate (Platen): A flat disk, often made of stainless steel, that matches the internal diameter of the mixing tank.
- Hydraulic Press: A system that lowers the platen into the vessel with significant force, physically "depressing" the material downward to force it out of a discharge valve at the bottom or side.
- Wiping Seals: High-quality seals (often inflatable or lip-style) located on the edges of the platen that scrape the vessel walls clean as it descends, maximizing yield and reducing waste.
- Vacuum Integration: Many systems operate under a vacuum to eliminate air bubbles and prevent oxidation during the "depressing" or discharge phase.
Applications:
- High Product Yield: These systems can achieve up to 99% product extraction, significantly reducing loss in high-value manufacturing.
- Simplified Cleaning: By scraping the walls as the material is discharged, the time and effort required for the subsequent cleaning cycle are greatly reduced.
- Consistent Flow: They provide a steady, pressurized flow that is necessary for feeding downstream equipment like filling machines or extruders.
- Safety and Hygiene: Many are designed for closed-system operation, which is critical for the pharmaceutical and food industries to maintain sanitary standards.
