Experimental study on combustion performance of high moisture lignite before and after drying

杜佳军; 郭前鑫; 曹忠友; 白杨; 赵勇纲; 向小凤; 徐长亮

doi:10.19666/j.rlfd.202410211

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Experimental study on combustion performance of high moisture lignite before and after drying

Thermal Power Generation Vol. 54, Issue 7, Pages: 153-159(2025)

更新时间：2026-08-11

- Experimental study on combustion performance of high moisture lignite before and after drying
- 作者机构：
  
  1. 神华神东电力有限责任公司
  2. 国能宝清煤电有限公司
  3. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202410211
  CLC： TQ534
- Published：2025
- 稿件说明：
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[1]杜佳军,郭前鑫,曹忠友,等.高水分褐煤干燥前后燃烧性能试验研究[J],2025,54(07):153-159.
[1]杜佳军,郭前鑫,曹忠友,等.高水分褐煤干燥前后燃烧性能试验研究[J],2025,54(07):153-159. DOI： 10.19666/j.rlfd.202410211.

DOI：10.19666/j.rlfd.202410211.

摘要

利用着火炉及一维炉试验平台对宝清高水分褐煤及其不同水分干燥褐煤的着火、燃尽及结渣性能进行试验研究。结果表明：宝清高水分褐煤的着火温度415℃，极易着火；相对于水分对着火温度的影响，细度对着火温度的影响更加显著；在低负荷下，水及水蒸气在燃烧初期对焦炭的消耗速率影响大；宝清高水分褐煤由于水分高，燃烧初期反应剧烈，飞灰可燃物质量分数迅速降低，结渣趋势也更强，但过高的水分不利于燃烧后期焦炭的燃尽；随着煤粉细度R90升高，煤粉燃尽率下降。但总体说来，宝清高水分褐煤及干燥煤的燃尽率均在99%以上，属于极易燃尽；氧量对燃尽率的影响效果不明显。

Abstract

The ignition

burnout

and slagging performance of Baoqing lignite raw coal and its dried lignite with different moisture contents was experimentally investigated using an ignition furnace and one-dimensional furnace test platform. The results show that

the ignition temperature of Baoqing raw coal is 415 ℃

which is highly prone to ignition. Compared to the influence of moisture on ignition temperature

the effect of fineness on ignition temperature is more significant. At low loads

the water and steam react with the water gas of coke in the early stages of combustion

which has a significant impact on the consumption rate of coke. Due to its high moisture content

raw coal undergoes intense reactions during the initial combustion stage

resulting in a rapid decrease in mass fraction of combustible materials in fly ash and a stronger tendency towards slagging. However

excessive moisture is not conducive to the complete combustion of coal powder in the later stage of combustion. As the fineness of coal powder R90 increases

the burnout rate of coal powder decreases. But overall

the burnout rate of both Baoqing raw coal and dry coal is above 99%

indicating the Baoqing coal is highly flammable

and the effect of oxygen on burnout rate is not significant.

关键词

Keywords

references

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