The new type of lime shaft kiln uses coal as fuel for stable calcination
During the lime production process, the choice of fuel directly affects the calcination stability and production cost. Traditional lime kilns use coke or gas as fuel, but in recent years, new lime kilns combined with advanced combustion technology have successfully achieved efficient and stable coal calcination, reducing energy consumption while ensuring lime quality.
1. Key technologies for coal calcination
The new lime vertical kiln adopts layered material distribution and intelligent air distribution system to ensure uniform combustion of coal powder in the kiln, avoiding local high temperature or under burning phenomenon. At the same time, the optimized design of the preheating zone improves the heat exchange efficiency, ensuring that limestone is fully decomposed and the activity is stable at above 350mL.
2. Combustion stability control
Through precise adjustment of the air coal ratio and real-time temperature monitoring, the temperature of the calcination zone in the kiln can be stably controlled at 1050-1150 ℃, reducing the risk of agglomeration and overburning. In addition, the application of low nitrogen combustion technology effectively reduces pollutant emissions and meets environmental protection requirements.
3. Significant economic benefits
Compared to gas or coke, coal fuel costs are reduced by 30% -40%, and the thermal efficiency of the new vertical kiln is increased to over 80%. The energy consumption per ton of lime is reduced by 15%, and the comprehensive benefits are significant.
4. Application prospects
This technology has been successfully applied in multiple large-scale lime production lines, especially suitable for industries such as metallurgy, chemical engineering, and building materials, providing reliable solutions for cost-effective lime production.
