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Influence of the cellulosehe,micellulose and lignin on the combustion behavior of biomass

2022 No. 04
647
427
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Authors:
LIU Yang
JIANG Tong
ZOU Chun
ZHANG Haisheng
Unit:
State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology;School of Energy and Power Engineering,Huazhong University of Science and Technology;Foshan Public Utilities Holdings Co., Ltd .,;Foran Energy Group Co.,Ltd.,
Abstract:

Biomass energy has become a hot topic of energy field research due to its advantage of zero carbon dioxide emission and renewable energy. How to utilize biomass energy rationally and fully has been concerned by governments and scientific research institutions at home and abroad. The study on the influence mechanism of the three components of biomass (cellulosehe,micellulose and lignin) on the ignition and combustion behavior of biomass can be used for the selection of biomass species and evaluation of biomass and coal co-combustion in biomass power plants. Hencken flat flame burner and a high-speed camera were used to record the ignition delay time of three components of biomass,three types of biomass,and simulated biomass. Combined with the radiation energy temperature measurement technology,the combustion characteristics of three components of biomass,three types of biomass and simulated biomass were discussed,and the effects of biomass structure characteristics on the combustion characteristics were analyzed. The results show that the ignition delay time of lignin among the three components of biomass is the shortest,followed by hemicellulose,and cellulose has the longest ignition delay time,which are 2.08,4.16 and 7.52 s respectively. The ignition behavior of three kinds of biomass and the corresponding simulated biomass are obviously different,and this difference increases with the increase of lignin content in biomass. After the ignition of cellulose and hemicellulose coke,the combustion temperature increases sharply to more than 1 000 K,while the particle temperature increases relatively gently after the ignition of lignin coke. In addition,the ignition delay time of real biomass is longer than that of simulated biomass,and the ignition delay time of simulated biomass decreases with the increase of lignin content. For the real biomass,the trend of peak temperature curves of rice stalk and chestnut shell are close to each other,and the temperature of chestnut shell is higher at the beginning of combustion,while the temperature curve of bamboo is special.

Keywords:
cellulose
lignin
hemicellulose
biomass
simulated biomass
combustion behavior
Citation format:
刘洋(1992—),男,江西抚州人,博士。E-mail:805944526@qq.com
通讯作者:邹春(1970—),男,湖南衡阳人,教授,博士。E-mail:zouchun@hust.edu.cn
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About Journal

  • Executive director

    China Coal Science and Industry Group Co., Ltd

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    Coal Science Research Institute Co., Ltd
    Coal Industry Clean Coal Engineering
    Technology Research Center

  • Editor in Chief

    XIE Qiang

  • Vice Editor-in-Chief

    YU Chang
    SHI Yixiang
    ZHAO Yongchun
    DUAN Linbo
    CAO Jingpei
    ZENG Jie

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