What are the environmental protection technical parameters of lime kilns
As a core equipment in industries such as building materials and metallurgy, the environmental performance of lime kilns directly affects the sustainable development of enterprises. Currently, environmentally friendly lime kilns have achieved precise control of pollutant emissions through technological innovation and parameter optimization. The main technical parameters cover the following aspects:
1. Kiln structure and thermal efficiency
Modern environmentally friendly lime kilns adopt a curved vase shaped design, with the furnace material dynamically rolling and descending, increasing the heating area by 30% and improving the thermal efficiency to over 85%. The kiln body adopts a four layer composite insulation structure, and the temperature of the kiln skin is only 60 ℃ higher than the environment, reducing heat loss by 40%. The standard coal consumption is controlled within 130kg/t lime.
2. Smoke purification system
Equipped with a two-stage filtration device of "bag filter+wet electrostatic precipitator", the particle emission concentration is ≤ 30mg/m ³, far below the national standard of 50mg/m ³. The desulfurization system adopts dry desulfurization technology, with a sulfur dioxide removal rate of 95%. Nitrogen oxides are controlled by SNCR technology, and the emission concentration is ≤ 100mg/m ³.
3. Fuel and combustion optimization
Supporting the adaptation of multiple fuels such as natural gas, low calorific value industrial waste gas (such as blast furnace gas), and clean coal powder, with a 20% increase in combustion efficiency. By using probability wind cap layered air supply technology, low wind pressure (≤ 3kPa) and small air volume (30% of ordinary kilns) operation can be achieved, reducing power consumption by 40%.
4. Automation control and monitoring
Integrating the Internet of Things and big data platform, real-time monitoring of 12 key parameters such as temperature, pressure, and oxygen content inside the kiln, and automatic adjustment of fabric, air supply, and ash discharge rhythm. Equipped with an online CEMS system, 24-hour continuous monitoring of pollutants such as particulate matter, SO ₂, NOx, etc., with data synchronized and uploaded to the environmental protection department.
The optimization of technical parameters for environmentally friendly lime kilns essentially promotes the industry's transformation towards green and low-carbon direction through the synergy of structural innovation, process control, and resource recycling. Environmentally friendly kiln types with real-time monitoring, intelligent regulation, and carbon reduction functions will become the mainstream in the market.
