Thermodynamic Analysis of Waste Heat Recovery for Sinter-Cooling System
SUN Yong-jun1,DONG Hui1,FENG Jun-sheng1,ZHANG Qi1,WANG Ai-hua1,LI Lei2
1. SEPA Key Laboratory on Eco-Industry, Northeastern University, Shenyang 110004, Liaoning, China 2. Luoyang Mining Machinery Research Institute, CITIC Heavy Industry Machinery Co. , Ltd. , Luoyang 471000, Henan, China
Abstract��The waste heat generation, transformation and utilization in sintering process were analyzed with thermodynamic analysis. The material flow diagram and exergy flow diagram of waste heat recovery system for sintering-cooling system were drawn. The energy output, conversion and utilization evaluation indexes were established. The state of waste heat recovery and utilization of a 360m2 sintering machine in China was analyzed. The results show that, exergy output efficiency, exergy conversion efficiency and exergy utilization efficiency can be used to evaluate waste heat utilization. The exergy utilization efficiency of sintering, cooling, boiler and turbine power generation is 0. 30, 0. 52, 0. 71 and 0. 39 respectively. Un-utilization of sensible heat of sinter flue gas and cooling gas in part 3 is the main problem. If the sensible heat was used for preheating gas or boiler feed water, the exergy utilization efficiency in sintering process and cooling process will increase to 0. 49 and 0. 70 separately.
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SUN Yong-jun,DONG Hui,FENG Jun-sheng,ZHANG Qi,WANG Ai-hua,LI Lei. Thermodynamic Analysis of Waste Heat Recovery for Sinter-Cooling System. Chinese Journal of Iron and Steel, 2015, 27(1): 16-21.
2015, Vol. 27 
