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过程工程学报 ›› 2019, Vol. 19 ›› Issue (3): 637-643.DOI: 10.12034/j.issn.1009-606X.218277

• 环境与能源 • 上一篇    下一篇

水稻秸秆与煤粉混合燃烧特性及动力学

邢献军1,2,4*， 陈泽宇1,2， 李永玲3， 朱成成1,2， 张学飞2   

  1. 1. 合肥工业大学汽车与交通工程学院，安徽 合肥 230009 2. 合肥工业大学先进能源技术与装备研究院，安徽 合肥 230009 3. 安徽建筑大学机械与电气工程学院，安徽 合肥 230601 4. 国家城市能源计量中心(安徽)，安徽 合肥 230051
  • 收稿日期:2018-09-06 修回日期:2018-10-20 出版日期:2019-06-22 发布日期:2019-06-20
  • 通讯作者: 邢献军 xxianjun@hfut.edu.cn
  • 基金资助:
    安徽省重点研究与开发计划项目;安徽省科技重大专项;安徽省科技计划项目

Co-combustion characteristics and kinetic analyses of rice straw and pulverized coal

Xianjun XING1,2,4*, Zeyu CHEN1,2, Yongling LI3, Chengcheng ZHU1,2, Xuefei ZHANG2   

  1. 1. School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei, Anhui 230009, China 2. Advanced Energy Technology and Equipment Research Institute, Hefei University of Technology, Hefei, Anhui 230009, China 3. School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China 4. National City Energy Measurement Center (Anhui), Hefei, Anhui 230051, China
  • Received:2018-09-06 Revised:2018-10-20 Online:2019-06-22 Published:2019-06-20
  • Contact: Xian-Jun XING xxianjun@hfut.edu.cn

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摘要： 采用热重分析法研究了水稻秸秆(RS)、煤粉(PC)及两者不同掺混比的混合物在不同升温速率下(10, 20, 40℃/min)从室温升至1000℃的燃烧特性，用Kissinger?Akahira?Sunose (KAS)法和Flynn?Wall?Ozawa (FWO)法计算了燃烧过程中的活化能。结果表明，失重速率(DTG)曲线中RS比PC多一个失重峰，且残余质量低。随升温速率增加，所有样品DTG曲线均向高温偏移，产生热滞后现象。RS和PC在混合燃烧过程中存在协同效应，且高温区域内更显著。PC掺混比例为50wt%时，混合物平均活化能的计算值较低，仅为76.0 kJ/mol (KAS)和83.2 kJ/mol (FWO)。

关键词: 水稻秸秆, 煤粉, 动力学, 混合燃烧, 活化能

Abstract: The synergistic interaction and kinetics of rice straw (RS), pulverized coal (PC) and their blends in the combustion process were investigated in this study. The content of PC in the blends were 30wt%, 50wt% and 70wt%, respectively. The experiments were carried out at different heating rates (10, 20 and 40℃/min) under air atmosphere with a flow rate of 60 mL/min and the temperature ranged from room temperature to 1000℃ in a thermogravimetric simultaneous thermal analyzer. Meanwhile their activation energy during combustion was studied by Kissinger?Akahira?Sunose (KAS) and Flynn–Wall–Ozawa (FWO) methods. The results indicated that the RS showed one more weight loss peak than the PC in the derivative thermogravimetric (DTG) curves and the residual mass of RS was lower than PC. The different mass of PC in the samples had no obvious effect on the co-combustion weight loss characteristics at the low temperature stage, but there was significant effect in the high temperature zone. As the heating rate increasing, the DTG curves of all samples were shifted to the high temperature side, resulting in thermal hysteresis. The interaction between RS and PC was inhibited in the temperature range of 320~520℃. When the temperature was above 530℃, there existed positive synergistic interaction between the combustion process of RS and PC, especially at 600℃. The kinetic analysis showed that the values of average activation energies calculated by KAS and FWO methods were highly consistent. When the content of PC was 50wt%, the activation energy reached the lower level, 76.0 kJ/mol by KAS and 83.2 kJ/mol by FWO, which indicated that the chemical reaction was easy to complete.

Key words: rice straw, pulverized coal, co-combustion, kinetics, activation energy