Application of the full process thermal efficiency model in reducing the heat consumption of cement clinker burning
Thermal efficiency model for the entire process of cement clinker burning is established in this paper.Its research object in-clude raw material mill,coal mill,cement clinker burning system and waste heat boiler.According to the thermal efficiency model,the thermal efficiency of the decomposition and calcination unit has the greatest impact on the thermal efficiency of the entire process,and should be given priority consideration in energy efficiency optimization.Taking the 2 500t/d production line as an example,after replac-ing the original preheating and decomposition system with the high solid-gas ratio preheating and decomposition system,the thermal ef-ficiency of the decomposition and calcination unit was increased from 27.09％to 30.08％,and the thermal efficiency of the entire pro-cess was increased from 68.23％to 76.50％.The heat consumption of clinker burning was reduced by 544.67 kJ/kg,and the consump-tion of standard coal burning was reduced by 18.6 kg/t.
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