Тип публикации: статья из журнала
Год издания: 2014
Идентификатор DOI: 10.1016/j.fuel.2014.06.052
Ключевые слова: Pulverised/micronized coal combustion, Autothermal regime, Computational modeling, Coal, Coal dust, Crude oil, Auto-thermal, Autothermal combustion, Comprehensive model, Computational design, Computational model, Dispersed particle, Multi-component systems, Pulverized coal combustion, Coal combustion
Аннотация: Burdukov et al. [6] showed experimentally that enhancement of coal reactivity when micronized in a high-impact disintegrator mill makes it possible to attain self-igniting and self-sustaining (autothermal) compact-flame combustion in a cold environment, akin to that of heavy oil. We present computational modeling of autothermal comПоказать полностьюbustion of mechanically-activated microground coal in a 5 MW pilot-scale combustor that complements the experiments of Burdukov et al. [7]. The aim was to verify the applicability of the comprehensive model of pulverized coal combustion to microground coal and to validate the submodel of the coal reactivity enhancement. The modeling follows the standard RANS approach to computing two-phase (reactive dispersed particles in gaseous medium) multi-component system, but with several new modifications related to particle heat transfer and their reactions. For reference, the study includes also the case with non-activated coal of the same granulation micronized in a vibrocentrifugal mill. The computations showed good agreement with the measurements and observations confirming that the model can reproduce the autothermal combustion of activated micronized coal and, thus, be employed with credible certainty to the computational design and optimization of new combustion (and gasification) devices fired with mechanically activated coal dust. (C) 2014 Elsevier Ltd. All rights reserved.
Журнал: FUEL
Выпуск журнала: Vol. 135
Номера страниц: 443-458
ISSN журнала: 00162361
Место издания: OXFORD
Издатель: ELSEVIER SCI LTD