What are the energy-saving technologies and measures for lime kilns
As a high-energy consuming equipment, adopting effective energy-saving technologies and measures for lime kilns is of great significance in reducing production costs. At present, the energy-saving methods commonly used in the industry mainly focus on improving thermal efficiency and recovering waste heat.
Optimizing the combustion system is a key measure to improve thermal efficiency. The use of a new swirl burner can make fuel combustion more complete and increase thermal efficiency by 8-12%. Accurately controlling the air coefficient within the range of 1.05-1.15 can ensure complete combustion and reduce smoke heat loss. The application of frequency conversion technology reduces the energy consumption of fans by 20-30%, while improving the uniformity of temperature distribution inside the kiln.
The waste heat recovery system can significantly reduce energy consumption. Installing a heat exchanger to recover the waste heat from flue gas at 300-400 ℃ can preheat the combustion air to above 200 ℃, saving 10-15% of fuel. Some enterprises use waste heat boilers to generate low-pressure steam for raw material drying or other production processes, achieving energy cascade utilization.
The renovation of kiln insulation is also an important energy-saving measure. Using nano insulation materials or composite insulation layers to reduce the surface temperature outside the kiln by 40-60 ℃ and minimize heat loss by 5-8%. Reasonable sealing of the kiln body can reduce air leakage and improve thermal efficiency by 3-5%. The comprehensive application of these energy-saving measures can reduce the overall energy consumption of lime kilns by 15-25%, with significant economic and environmental benefits.
