EcoTherm® Regenerative Shaft Kiln with Co-current Calcination- High-efficiency lime kilns

Technical Features of Regenerative Shaft Kilns – High-efficiency lime kilns  

1. Co-current Calcination: This primary technical characteristic ensures the highest-temperature flames contact lower-temperature raw materials, achieving exceptional heat exchange efficiency. Meanwhile, relatively cooler flue gases interact with nearly calcined materials, preventing over-burning or under-burning. The final product exhibits superior quality, with high activity (≥370 ml) and low residual CO₂ (typically ≤2.5%).
2. High Thermal Efficiency: The regenerative heat exchange system redirects high-temperature exhaust gases to preheat the kiln chamber. Prolonged heat recovery transfers waste heat to raw materials, significantly reducing energy consumption. The thermal energy consumption per unit product can reach as low as 850 kcal/kg, the lowest among existing kiln types.
3. Low Exhaust Temperature & Dust Emissions: Full heat exchange between exhaust gases and materials results in low exhaust temperatures (90–130°C under normal operation) and minimal dust concentration (5–20 g/m³). This facilitates cost-effective exhaust purification and reduces environmental impact.
4. Uniform Heat Supply: 2×33 burners are evenly distributed within the kiln chamber, each delivering heat to an identical zone. This ensures homogeneous thermal distribution across the kiln’s cross-section, enabling consistent product calcination.
5. Convenient Quality Control: 2×8 inspection doors are installed at the kiln base. Operators can adjust fuel supply to specific burners based on real-time product quality checks, ensuring final product uniformity.
6. Equipment Reliability: Most kiln components (e.g., air/flue gas diversion dampers, chimney exhaust dampers, chamber isolation gates, feed hopper gates, discharge devices, discharge chute seals, and level indicators) utilize hydraulics for stable and reliable operation.
7. Superior Kiln Insulation: Excellent thermal insulation minimizes surface temperatures, reducing ambient heat radiation and further enhancing energy efficiency.