TY - JOUR
TI - Optimization of physical property and working condition parameters in multi-size sinter vertical tank based on exergy analysis
AU - Zhang Si-Zong
AU - Huang Lin-Jing
AU - Wen Zhi
AU - Liu Xun-Liang
JN - Thermal Science
PY - 2023
VL - 27
IS - 5
SP - 3993
EP - 4005
PT - Article
AB - Aiming at the characteristics of multi-size particles in the waste heat recovery sinter vertical tank, a steady-state gas-solid heat transfer model of multi-size ver¬tical tank was established. Based on exergy analysis, the influences of physical properties and working conditions on the gas-solid heat transfer and the waste heat recovery capacity of the vertical tank were studied. Finally, the optimum pa¬rameter combination was obtained by the orthogonal test method. Results showed that the mono-size sinter was no longer suitable for analyzing the gas-solid heat transfer process of the vertical tank in the actual production. The total exergy of the multi-size sinter vertical tank increased first and then decreased with the in¬crease of aspect ratio in the range of 0.39-1.75, and reaches the peak value when height-diameter ratio is 0.7. The total exergy increased with the increase of tem¬perature difference between gas-solid inlet temperature. The total exergy increased first and then decreased with the increase of gas-material ratio in the range of 610-1170 m3 per tone, and reached the maximum value at the gas-material ratio of 850 m3 per tone. The exergy decreased with the increase of porosity in the range of 0.548-0.603. The most suitable vertical tank parameters were height-diameter ra¬tio 0.44, sinter inlet temperature 800°C, gas inlet temperature 25°C, gas-material ratio 770 m3 per tone and porosity 0.601.