Experimental study on propagation characteristics of horizontal smoldering combustion of coal pile

doi:10.16265/j.cnki.issn1003-3033.2018.04.009

Abstract

Abstract: In order to explore the temperature distribution and its dynamic development process of the smoldering combustion of coal pile in the closed fire zone, experiments were carried out on smoldering combustion of coal pile. The results show that there is a temperature platform in the range of 70-80 ℃ in the forward smoldering combustion process, but there is not such a platform in the reverse smoldering combustion process, that the maximum smoldering reverse temperature is much higher than the smoldering forward temperature, that in horizontal forward smoldering, there is no obvious separation between the pyrolysis frontier and oxidation frontier in the initial stage, and they will separate from each other gradually after a certain period of time, and that in horizontal reverse smoldering, the pyrolysis frontier and oxidation frontier separate from each other obviously from the beginning of ignition.

Key words: coal pile, horizontal smoldering combustion, oxidation, pyrolysis, propagation velocity, temperature variation

CLC Number:

X932

QI Guansheng, LI Min, YANG Husheng, WANG Deming, MA Liyang. Experimental study on propagation characteristics of horizontal smoldering combustion of coal pile[J]. China Safety Science Journal, 2018, 28(4): 47-52.

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