THERMAL SCIENCE

International Scientific Journal

Si-Zong Zhang

,

Lin-Jing Huang

,

Zhi Wen

,

Xun-Liang Liu

OPTIMIZATION OF PHYSICAL PROPERTY AND WORKING CONDITION PARAMETERS IN MULTI-SIZE SINTER VERTICAL TANK BASED ON EXERGY ANALYSIS

ABSTRACT
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.
KEYWORDS
sinter vertical tank, waste heat recovery, orthogonal test method, exergy analysis, numerical simulation, parameter optimization
PAPER SUBMITTED: 2022-09-17
PAPER REVISED: 2022-12-16
PAPER ACCEPTED: 2022-12-28
PUBLISHED ONLINE: 2023-03-11
DOI REFERENCE: https://doi.org/10.2298/TSCI220917045Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 5, PAGES [3993 - 4005]
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Optimization of physical property and working condition parameters in multi-size sinter vertical tank based on exergy analysis

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