KAYEENG's Technology and Practice for Energy Saving and Emission Reduction in Preheater Rotary Lime Kilns
Against the backdrop of the `dual carbon `goals, the lime industry is accelerating its green and low-carbon transformation. Recently, KAYEENG introduced its technical route and practical results in energy saving and emission reduction for preheater rotary lime kilns. Through the coordinated application of optimized top coils, high-efficiency low-NOx combustion, intelligent coal powder metering, and scientific production management, the company has achieved positive progress in reducing coal consumption, lowering emissions, and stabilizing lime quality.
1. Optimized Top Coils: More Effective Waste
Heat Recovery, Preheater Outlet Temperature Reduced by About 50°C
By adjusting and optimizing the arrangement of
the top coils in the preheater chamber, KAYEENG enables the stone
material in the top silo to be fully dried and preheated. While increasing the
temperature of the stone fed into the kiln and improving calcination
conditions, this design effectively recovers waste heat from the preheater
exhaust gas. As a result, the temperature at the preheater outlet is reduced by
about 50°C, further reducing system heat loss and creating more stable thermal conditions
for subsequent production stages.
2. High-Efficiency Low-NOx Burner: Flame Heat
More Effectively Participates in Calcination, Reducing Kiln Coating Temperature
and NOx Emissions
3. Advanced Rotor Weighfeeder and Intelligent
Control: More Intelligent and Uniform Coal Powder Metering
The company has also introduced advanced rotor
weighfeeder equipment and control systems, making coal powder feeding and
metering more intelligent and uniform. Through precise and stable control of
the coal feeding rate, fluctuations in coal powder that may disturb kiln
conditions can be effectively reduced, the temperature stability of the
calcination zone can be improved, and support can be provided for lower coal
consumption and higher lime quality.
4. System Integration and Scientific
Management: Coal Saving of 10–20 kg per Ton of Quicklime
On the basis of the above technical measures,
KAYEENG combines scientific production management, including process parameter
optimization, equipment maintenance, and standardized operations, to form a
replicable and scalable practical solution for energy saving and emission
reduction. Practical applications show that coal consumption can be reduced by
10–20 kg per ton of quicklime. Actual cases demonstrate that on 800–1200 tpd
production lines, the heat consumption for producing high-quality lime with LOI
of 1%–3% can reach 950–1050 kcal/kg, demonstrating excellent energy-saving and
consumption-reduction results.
KAYEENG states that it will continue to carry out
technical optimization and practical promotion around the green, low-carbon,
and efficient operation of preheater rotary lime kilns, helping lime
enterprises improve both economic and environmental benefits.
Domestic and international customers are
welcome to visit our company for exchanges and cooperation!
