Preheater & Calciner Discharge
Thermal Stability Under Extreme Operating Conditions
In modern cement manufacturing, the preheater and calciner are among the most thermally aggressive zones in the entire plant. Material exiting these sections carries elevated temperatures, fine highly abrasive particles, pressure fluctuations, and high gas velocities.
In these environments, Rotary Air Locks are not simple discharge devices, they are critical thermal isolation components that protect downstream systems and preserve pressure integrity.
Oswar Rotocorp High Temperature Rotary Air Locks are engineered specifically for these demanding zones.
What Makes This Zone Demanding
The Engineering Challenge
- Continuous high thermal load and rapid temperature cycling
- Abrasive raw meal flow under negative pressure control requirements
- Gas-solid separation constraints at discharge points
- False air ingress causing loss of cyclone efficiency
- Combustion imbalance and increased fan power consumption
- Thermal distortion and seal degradation are the most common failure modes in standard valves
How Oswar Rotocorp Solves It
Controlled Thermal Expansion Management
- Calculated expansion tolerances for elevated operating temperatures
- Optimized rotor-body gap control prevents seizure under thermal load
- Heat-stable housing materials for prolonged thermal exposure
- Thermal-relief internal geometry ensures operational stability
Outboard Bearing Protection
- Extended shaft design moves bearings away from heat source
- Outboard bearing placement prevents heat migration
- Thermal barrier separation protects critical rotating components
- Heat-shielded bearing housings extend bearing lifespan
Heat-Resistant Sealing Systems
- Graphite-based sealing options for high-temperature resistance
- High-temperature gasket materials maintain integrity under thermal stress
- Low-friction seal design reduces wear at elevated temperatures
- Pressure-isolating end cover configuration protects process zones
Reliable Sealing Under Elevated Temperatures
- Maintains pressure differential between cyclone system, calciner, and downstream conveying
- Precision-machined rotor geometry ensures minimal leakage
- Tolerates abrasive wear while maintaining seal performance
- Protects cyclone separation efficiency and draft stability
Engineering Features
Operational Benefits
Recommended Series for Preheater & Calciner Discharge
Preheater and calciner zones operate 24/7 under constant stress. Failure at discharge points can cascade into kiln instability, production loss, and unplanned shutdowns. Oswar Rotocorp High Temperature Series is engineered to protect thermal stability, pressure integrity, and continuous plant productivity.