纤维素、半纤维素和木质素对生物质燃烧行为影响研究  

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

作　　者：刘洋[1,2,3,4] 姜通 邹春 章海生 LIU Yang;JIANG Tong;ZOU Chun;ZHANG Haisheng(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China;School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Foshan Public Utilities Holdings Co.,Ltd.,Foshan 528000,China;Foran Energy Group Co.,Ltd.,Foshan 528000,China)

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [3]佛山市公用事业控股有限公司,广东佛山528000 [4]佛燃能源集团股份有限公司,广东佛山528000

出　　处：《洁净煤技术》2022年第4期137-143,共7页Clean Coal Technology

基　　金：国家自然科学基金资助项目(51776081)。

摘　　要：生物质能因其CO_(2)零排放和可再生的优点已成为能源领域研究的热点,如何合理并充分利用生物质能受到广泛关注。研究生物质三组分(纤维素、半纤维素和木质素)对生物质的着火及燃烧行为的影响机理,可用于生物质电厂的生物质种类选择与生物质掺混煤粉燃烧评估。采用Hencken平焰燃烧器和高速摄像机拍摄生物质三组分、3种生物质及对应的模拟生物质的着火延迟时间,结合辐射能测温技术探讨生物质三组分、3种生物质和模拟生物质的燃烧特性,分析生物质结构特性对其的影响。结果表明,生物质三组分中木质素的着火延迟时间最短,半纤维素其次,纤维素的着火延迟时间最长,其着火延迟时间分别为2.08、4.16和7.52 s。生物质与其对应的模拟生物质燃烧特性明显不同,且这种差异随生物质中木质素含量的增加而增强。纤维素和半纤维素焦着火发生后燃烧温度急剧增至1000 K以上,而木质素焦着火后,颗粒温度增加相对平缓。实际生物质的着火延迟时间都长于模拟生物质,并且模拟生物质的着火延迟时间随木质素含量的增加而不断缩短。对于实际生物质,稻杆和板栗壳的峰值温度曲线趋势相近,板栗壳燃烧初期的温度更高,而竹子样品则呈较特殊的温度曲线。Biomass energy has become a hot topic of energy field research due to its advantage of zero carbon dioxide emission and renew.able 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-com.bustion 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 hemi⁃cellulose coke,the combustion temperature increases sharply to more than 1000 K,while the particle temperature increases relatively gen⁃tly after the ignition of lignin coke.In addition,the ignition delay time of real biomass is longer than that of simulated biomass,and the ig⁃nition delay time of simulated biomass decreases with the increase of lignin content.For the real biomass,the trend of peak tempera⁃ture curves of rice stalk and chestnut shell are close to each other,and the temperature of chestnut shell is higher at the beginning of com⁃bust

关 键 词：纤维素 木质素 半纤维素 生物质 模拟生物质 燃烧行为 

分 类 号：TK6[动力工程及工程热物理—生物能]