Technical Approach to Improving Thermal Efficiency of Industrial Lime Furnace
Improving the thermal efficiency of industrial lime kiln is the key to reduce energy consumption and improve production efficiency. The following are some effective technical approaches:
Optimize raw material and fuel: select limestone raw material with stable quality and reasonable chemical composition, and ensure uniform particle size of fuel to increase the contact area between fuel and limestone and improve combustion efficiency. At the same time, the water content of coal or coke shall be controlled to be lower than 3% to reduce the loss due to unburnt coal.
Improved kiln structure: efficient thermal insulation materials are used to reduce heat loss; Optimize the design of the height to diameter ratio of the kiln and the thickness of the refractory brick layer to improve the thermal efficiency. The new energy-saving kiln is designed in curved vase-shape, which makes the furnace burden roll and drop dynamically, improves the calcining capacity and reduces the coal consumption.
Optimized combustion system: high-efficiency burner is selected to ensure full combustion of fuel; Optimize the ratio of combustion air to fuel and control the excess air coefficient; Oxygen-enriched combustion technology is adopted to improve combustion temperature and reduce fuel consumption.
Waste heat recovery: preheat combustion air, fuel and raw meal or dry materials with kiln exhaust gas; Install a waste heat boiler to produce steam, or use it for heating and bathing in the plant area to improve the utilization rate of heat energy.
