HOT GAS FLOW AND MILD PYROLYSIS OF COAL IN FIXED BED

HU Guoxin; LIU Yaqin; WANG Minglei

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HOT GAS FLOW AND MILD PYROLYSIS OF COAL IN FIXED BED

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- HOT GAS FLOW AND MILD PYROLYSIS OF COAL IN FIXED BED
- CIESC Journal Issue 11, (2001)
- 作者机构：
  
  上海交通大学动力与能源工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 November 2001，
  
  Published：25 November 2001
- 稿件说明：
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HU Guoxin, LIU Yaqin, WANG Minglei. HOT GAS FLOW AND MILD PYROLYSIS OF COAL IN FIXED BED[J]. CIESC Journal, 2001, (11).
DOI：

HU Guoxin, LIU Yaqin, WANG Minglei. HOT GAS FLOW AND MILD PYROLYSIS OF COAL IN FIXED BED[J]. CIESC Journal, 2001, (11). DOI：

摘要

针对煤燃烧前热解脱硫工艺

研究固定床中气体渗流传热传质与煤热解反应综合过程

建立多孔介质非稳态渗流传热传质与煤热反应相互作用的物理数学模型

研究不同情况下床内气固温度和煤热解挥发分析出浓度瞬态分布规律 .计算结果表明

固定床中煤料的热解反应主要发生在床层下部的热渗透作用区域

随着运行时间的延长

煤热解区段不断向床高方向推移 .提高热气入口温度

热渗透作用区域内的物料温度水平提高

煤粒热解反应期缩短 .在热作用区域

煤热解反应与渗流传热传质过程密切相关 .模型计算结果与文献中的实验数据进行了比较

两者符合较好 .研究结果对于煤燃烧前热解脱硫装置的设计与运行具有一定的参考作用

Abstract

A simple pyrolysis method is presented

in which the coal is preheated with flue gas in a fixed bed. The high heat penetration into the packed bed of coal particles is described mathematically with a reaction and transport model. The temperature profiles for the particles

and the transient local distribution of volatile matter are examined under different conditions. The thermal penetration into the packed-bed particles by fluid flow is analyzed. The thermal penetration depth and coal pyrolysis zone moves along the bed with time. Increasing inlet gas temperature tends to enhance the temperature level in the thermal penetration zone and decrease the pyrolysis time. The model results are found to agree the experimental data available in literature.

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