Fundamental Experiments of Coal Ignition for Engineering Design of Coal Power Plants

Taniguchi, Masayuki

doi:10.5772/28477

Cited by 1 publication

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9 Despite the abundance of knowledge on coal burnout in the literature, there is still a shortage of essential information regarding the influence of ash-forming metals on particle ignition, flame propagation, tar formation, and in situ tar oxidation. In a real combustion environment, the volatiles are released at a heating rate on the order of 10 5 K/s, 10 and the released volatiles also partly reside on the char surface, forming a cloud that affects subsequent char ignition and oxidation steps. 11 The aforementioned studies with low heating rates failed to address all of these aspects.…”

Section: Introductionmentioning

confidence: 99%

Influence of External Clay and Inherent Minerals on Lignite Optical Ignition and Volatile Flame Propagation in Air-Firing and Oxy-Firing

Prationo

Zhang

Abbas

et al. 2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

The influence of external clay additive and inherent minerals on the ignition of a Xinjiang lignite and its volatile flame propagation in air versus oxy-fuel combustion have been clarified in this work, through the use of a flat-flame burner reactor (FFBR) coupled with in-situ optical diagnosis tools. As has been confirmed, ignition of the lignite studied in this paper was initiated by homogeneous oxidation of a tarry volatile cloud. The removal of HCl-soluble metals shifted coal devolatilization toward higher temperatures in air and 21% O 2 in CO 2 . The mixing of external clay with coal had little effect on the ignition time. However, it enhanced the decomposition of volatiles, leading to a larger volatile cloud shielding on the particle surface. The oxygen fraction in the bulk gas was found to be most influential. Increasing the oxygen fraction to 30% eliminated all of the discrepencies between raw lignite, acid-washed lignite, and a mixture of raw lignite and clay.

show abstract

Section: Introductionmentioning

confidence: 99%