The lime rotary kiln process is the material will be fed into the kiln tail through the chute in the gas chamber. As the kiln shell is inclined and rotates slightly, material will move along the round shell and move along shaft direction from kiln tail to kiln head. The material will be processed through pre-heat, decompose, calcined and will be fed into a cooler. Fuel will be given through gas or coal burner at kiln head and will be combusted in the kiln. Heat will be transferred to material by fire radiate, hot air flow, kiln brick transfer. The heat will heat and calcine material enough and make its final product.
The lime rotary kiln produced by CHAENG uses a vertical preheater with advanced structure and low pressure loss, which can effectively improve the preheating effect and increase the production efficiency. The quality of the lime produced is very good. Compared with the traditional lime rotary kiln, the output is increased by 30%, and the heat consumption is reduced by 40%. It is convenient for dust collection and can meet the modern energy-saving and environmental protection requirements.
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|Designed capacity (T/D)||200||300||400||600||800||1000|
|Product||active lime||active lime||active lime||active lime||active lime||active lime|
|Number of push rod||6||8||10||12||16||18|
|Effective volume (m³)||190||292||430||575||738||1005|
|Heat rate (KJ/Kg)||5200||5200||5100||5000||5000||5000|
1. High production efficiency and good lime quality
The lime rotary kiln produced by Xinxiang Great Wall Machinery adopts a vertical preheater with low-pressure loss, which can effectively improve the preheating effect and improve production efficiency. The quality of lime is very good, and the activity of lime is ≥300 (ml), which is an ideal energy-saving and environmentally friendly lime kiln equipment.
2. Energy-saving calcination method, fully enclosed calcination mechanism
The overall design adopts a fully sealed calcination mechanism, and the refractory insulation layer in the kiln is made of multi-layer refractory materials, which are light, and the design life of the refractory insulation layer in the kiln is more than 5 years. In order to use energy efficiently, the upper and lower parts of the kiln adopt heat exchange to reduce the heat loss from the upper and lower parts.
3. Using frequency converter, the equipment runs with energy saving
The power used in the production of the lime kiln is controlled and operated by frequency converters, which avoids the phenomenon of no-load operation, and saves electricity by more than 40% on average.
In 2014, A company in Guangxi Province, China purchased a φ4.0 × 60m lime rotary kiln from CHAENG, the rotary kiln was installed in 2017, and it was put into use in June 2017.
After use, customers made positive comments that machines of CHAENG have outstanding performance and are good at energy-saving to save large cost for users.
Lime rotary kiln structure is advanced and simple. The vertical preheater can effectively improve the preheating effect, the preheated limestone enters into the rotary kiln and is calcined at the best calcination temperature of 900 ~ 1100 ℃, the decomposition rate is up to 20 - 25%, more efficiently; the sealing system at both ends of the rotary kiln can make the air leakage coefficient less than 10%, to effectively reduce the loss of heat; the cooler located in the rotary kiln discharge port, can control the lime temperature at 800 ℃, making transport and storage more convenient.