E3S Web Conf.
Volume 118, 20192019 4th International Conference on Advances in Energy and Environment Research (ICAEER 2019)
|Number of page(s)||5|
|Section||Energy Engineering, Materials and Technology|
|Published online||04 October 2019|
Combining theory and experiment analysis in molten BFS waste heat recovery integrated with coal gasification
School of Metallurgy, Northeastern University, No 11, Lane 3, Wenhua Road, He Ping District, Shenyang 110819, Liaoning, People’s Republic of China
2 Shenyang Metrology Testing Institution, No. 43, Shi Ji Road, Hun Nan District, Shenyang, Liaoning, 110179, People’s Republic of China
* Corresponding author: email@example.com
A novel method that a heat recovery system from blast furnace slag integrated with coal gasification reaction to generate syngas was proposed. The motion characteristic and critical velocity of the coal particles in the molten slag were estimated. Meanwhile, the effects of temperature and steam to coal ratio on coal gasification product distribution and gas characterization were discussed. The results showed that the coal particles (~75 μm) would break through the bondage of bubbles and transport into molten slag when the velocity of coal particles were above 4.20 m·s-1 and the diameter of bubbles were less 6 mm. There had higher gasification efficiency, gas yield production and H2 production by this method. The results suggested that the optimal conditions for slag waste heat recovery were achieved at 1623 K and steam to coal ratio of 2.0. Under these conditions, the gas yield and carbon conversion reached 133.48 mol·kg-1 and 97.81%, respectively. The proposed method enhanced the coal gasification efficiency and recovered the high quality of molten blast furnace slag waste heat effectively, and had important guidance for industrial manufacture.
© The Authors, published by EDP Sciences, 2019
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