Rapid pyrolysis rules of Jinjie bituminous coal at high temperatures

CAI Jinyu; ZHANG Jun; LU Qi'an; LIU Siyuan

doi:10.19666/j.rlfd.201903073

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Rapid pyrolysis rules of Jinjie bituminous coal at high temperatures

更新时间：2025-09-28

- Rapid pyrolysis rules of Jinjie bituminous coal at high temperatures
- Thermal Power Generation Vol. 48, Issue 11, Pages: 30-36(2019)
- 作者机构：
  
  东南大学能源与环境学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201903073
  CLC： TQ530.2
- Published Online：29 October 2019，
  
  Published：2019
- 稿件说明：
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CAI Jinyu, ZHANG Jun, LU Qi'an, et al. Rapid pyrolysis rules of Jinjie bituminous coal at high temperatures[J]. Thermal power generation, 2019, 48(11): 30-36.
DOI：

CAI Jinyu, ZHANG Jun, LU Qi'an, et al. Rapid pyrolysis rules of Jinjie bituminous coal at high temperatures[J]. Thermal power generation, 2019, 48(11): 30-36. DOI： 10.19666/j.rlfd.201903073.

摘要

为全面了解制焦产物性质以便更好地设计制焦反应器

本文利用滴管炉反应器

在常压氮气氛围下实验分析了锦界烟煤在800～1 100℃、停留时间3～5 s的快速热解特性

研究了其热解半焦、热解焦油和热解气的产物组成分布及特性。结果表明:热解产物的产率与热解温度和停留时间都有较大关联

为了在减少焦油产率的同时保证粉状半焦储存的安全性

热解温度宜设置在1 000℃以上

此时热解气产率和H_2质量分数均较高;高温制取的粉状半焦吸附性能差;热解焦油主要由芳香烃及其衍生物组成

极高沸点物质含量较少

制焦反应器管道温度维持在400℃即可有效降低焦油凝结概率。

Abstract

To comprehensively understand the properties of the products in coke making technology to better design a coke reactor

the rapid pyrolysis characteristics of Jinjie bituminous coal were studied in atmosphere of normal pressure nitrogen

by means of drop-tube furnace

at pyrolysis temperatures ranging from 800 ℃ to 1 100 ℃ and with the residence time of 3～5 seconds. It focuses on the distribution and properties of different pyrolysis products including semi-coke

tar and pyrolysis gases. The results show that

the pyrolysis temperature and residence time affect the distribution and properties of the pyrolysis products greatly. It is better to maintain the pyrolysis temperature over 1 000 ℃ to reduce tar yield and ensure the safety of storage of semi-coke. At the same time

the yield of the pyrolysis gases and the proportion of H_2 are also in a large value. However

the adsorption performance of the semi-coke prepared at high temperatures is poor. The tar is mainly composed of aromatic hydrocarbons and their derivatives

which has small content of matters with extremely high boiling points. Therefore

it is better to keep the temperature of tubes around 400 ℃ to limit the probability of slagging effectively.

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