Experimental investigation of coal ignition in counterflow flames

Ning Wu; Yi Chen Zong; Shui Qing Li; Qiang Yao; C. K. Law

Experimental investigation of coal ignition in counterflow flames

Ning Wu, Yi Chen Zong, Shui Qing Li, Qiang Yao, C. K. Law

Research output: Contribution to journal › Article › peer-review

Abstract

A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 10⁵ K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.

Original language	English (US)
Pages (from-to)	224-227
Number of pages	4
Journal	Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics
Volume	36
Issue number	1
State	Published - Jan 1 2015
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanical Engineering

Keywords

Conterflow flame
Ignition
Particle feeder
Pulverized coal

Cite this

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title = "Experimental investigation of coal ignition in counterflow flames",

abstract = "A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 105 K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.",

keywords = "Conterflow flame, Ignition, Particle feeder, Pulverized coal",

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AU - Zong, Yi Chen

AU - Li, Shui Qing

AU - Yao, Qiang

AU - Law, C. K.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 105 K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.

AB - A novel counterflow flame apparatus that can meet the requirement of heterogeneous combustion of pulverized coal particles was developed. A new micro-scale powder feeding system was developed based on the fundamental of deagglomeration by particle-wall impaction, achieving a perfect dispersion and stable feeding rate of coal particles in low carrier flows. With the advanced ICCD optical technology, the behavior of coal particles across the counterflow flame was observed. Results show that the particle heat rate can reach as high as 105 K/s, while flame temperature and particle residence time are the dominant factors that influence the ignition mechanism in the post-flame zone.

KW - Conterflow flame

KW - Ignition

KW - Particle feeder

KW - Pulverized coal

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JF - Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics

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Experimental investigation of coal ignition in counterflow flames

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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