欢迎访问过程工程学报, 今天是

›› 2015, Vol. 15 ›› Issue (2): 272-277.

• 过程与工艺 • 上一篇    下一篇

干熄焦除尘灰与低灰煤混合燃烧特性及动力学

刘国庆 刘清才 姚璐 任山 孙健 敖万忠 龙明华 张东升 肖扬武   

  1. 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院 首钢水城钢铁(集团)有限责任公司 首钢水城钢铁(集团)有限责任公司 首钢水城钢铁(集团)有限责任公司 首钢水城钢铁(集团)有限责任公司
  • 收稿日期:2015-01-13 修回日期:2015-03-09 出版日期:2015-05-05 发布日期:2015-05-05
  • 通讯作者: 任山

Combustion Characteristics and Kinetics of Mixed Coke Dry Quenching Dust and Low Ash Coal

LIU Guo-qing LIU Qing-cai YAO Lu REN Shan SUN Jian AO Wan-zhong LONG Ming-hua ZHANG Dong-sheng XIAO Yang-wu   

  1. College of Materials Science and Engineering, Chongqing Universit College of Materials Science and Engineering, Chongqing Universit College of Materials Science and Engineering, Chongqing Universit College of Materials Science and Engineering, Chongqing Universit College of Materials Science and Engineering, Chongqing Universit Shougang Shuicheng Iron & Steel (Group) Co., Ltd. Shougang Shuicheng Iron & Steel (Group) Co., Ltd. Shougang Shuicheng Iron & Steel (Group) Co., Ltd. Shougang Shuicheng Iron & Steel (Group) Co., Ltd.
  • Received:2015-01-13 Revised:2015-03-09 Online:2015-05-05 Published:2015-05-05
  • Contact: REN Shan

PDF

摘要： 采用综合热重分析仪对不同比例干熄焦除尘灰与高炉喷吹低灰煤混合燃烧过程的动力学特性进行研究，在流速为60 mL/min的空气中，以不同升温速率从室温升至1173 K进行非等温燃烧实验. 结果表明，干熄焦除尘灰配入比及升温速率对低灰煤燃烧过程有重要影响，随干熄焦除尘灰配比增加，混料的着火点和燃尽温度逐渐降低，最大失重率和可燃指数逐渐增大，混料的燃烧性能逐渐变好. 利用非等温实验模型FWO对混料在不同升温速率下的燃烧过程进行动力学分析，干熄焦除尘灰配入比从0增加到10%，混料燃烧的活化能从92.82 kJ/mol降低到47.37 kJ/mol，配入量为8%时可显著降低混料燃烧的活化能.

关键词: 干熄焦除尘灰, 低灰煤, 热重分析, 燃烧, 动力学, 活化能

Abstract: Combustion kinetics of mixed coke dry quenching (CDQ) dust and low ash coal was investigated by thermogravimetric analysis from ambient temperature to 1173 K at 60 mL/min air flow rate under different heating rates, respectively. The results showed that CDQ dust content and heating rate had important effects on the combustion process of dust-coal blends. With the increase of CDQ dust content in the coal blends, the ignition temperature and burnout temperature decreased, the maximum loss rate and the combustible index increased, and the burning characteristic of the blends became better. The non-isothermal Flynn-Wall-Ozawa model was used to study the combustion kinetics of blends under different heating rates. When CDQ dust content varied from 0 to 10%, the activation energy decreased from 96.82 to 47.37 kJ/mol. Furthermore, adding 8% CDQ dust into the blends could decrease the activate energy of the blends effectively.

Key words: coke dry quenching dust, low ash coal, thermogravimetric analysis, combustion, kinetics, activation energy

中图分类号: