Study on ignition characteristics of coal particles based on wire-mesh reactor

CHEN Wen; LIU Tingfeng; HE Honghao; GONG Xun

doi:10.19666/j.rlfd.202003057

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Study on ignition characteristics of coal particles based on wire-mesh reactor

Thermal Power Generation Vol. 49, Issue 6, Pages: 128-133(2020)

更新时间：2025-09-28

- Study on ignition characteristics of coal particles based on wire-mesh reactor
- 作者机构：
  
  1. 国网湖南省电力有限公司电力科学研究院(高效清洁火力发电技术湖南省重点实验室)
  2. 华中科技大学煤燃烧国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202003057
  CLC： TK16
- Published Online：24 May 2020，
  
  Published：2020
- 稿件说明：
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CHEN Wen, LIU Tingfeng, HE Honghao, et al. Study on ignition characteristics of coal particles based on wire-mesh reactor[J]. Thermal Power Generation, 2020, 49(6): 128-133.
DOI：

CHEN Wen, LIU Tingfeng, HE Honghao, et al. Study on ignition characteristics of coal particles based on wire-mesh reactor[J]. Thermal Power Generation, 2020, 49(6): 128-133. DOI： 10.19666/j.rlfd.202003057.

摘要

为在减弱挥发分与煤焦颗粒二次反应以及煤粉堆积效应的情况下探究不同挥发分煤种和焦颗粒的着火特性

选取了挥发分含量差异较大的1种褐煤和1种烟煤

在自建的金属网反应器系统上进行了着火实验

并与传统的热重实验结果进行了对比。结果表明:挥发分对煤粉着火温度的影响最大

随着挥发分含量的升高

煤粉的着火温度逐渐降低;由于减少了样品的堆积效应以及减弱了升温过程中的挥发分燃烧

金属网上测得的着火温度高于热重所得着火温度

更接近煤粉颗粒的实际着火温度;褐煤的反应性高于烟煤

焦样的着火温度低于原样

但焦样的比表面积和孔容的增大使得其可用于吸附研究。

Abstract

To study the ignition characteristics of coal and coal-char particles with different volatile contents under the condition of limiting the secondary reactions between volatiles and coal-char particles and the "stacking effect" of coal particles

a lignite and a bituminous coal with different volatile contents were selected to carry out ignition experiments on a self-built wire-mesh reactor.Moreover

ignition experiments were also conducted on conventional thermal gravimetric analyzer for comparason.The results show that

the volatile contents have the greatest effect on ignition temperature of the pulverized coal.With the increase of volatile contents

the ignition temperature of pulverized coal gradually decreases.Due to the reduction of the "stacking effect" of samples and the reduction of volatile combustion during heating process

the ignition temperature measured by wire-mesh reactor is higher than that obtained by thermogravimetry

which is closer to the actual ignition temperature of pulverized coal particles.The reactivity of lignite is higher than that of bituminous coal

and the ignition temperature of coal-char is lower than the original

but the increase of specific surface area and pores of coal-char samples make it suitable for adsorption study.

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