Pyrolytic and Combustion Characteristics of Woody Bio-Pellets
Pyrolytic and Combustion Characteristics of Woody Bio-Pellets
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木质生物颗粒的热解和燃烧特性
DOI：
10.3775/jie.83.788
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发表时间：
2004
影响因子：
0.2
通讯作者：
H. Sano
中科院分区：
文献类型：
--
作者：
Kunihiko Namba;T. Ida;M. Fuchihata;H. Sano
从环境保护和资源保护的角度来看，废物的回收利用一直在推进。随着化石燃料的减少，人们对新能源的期望越来越高。生物质是防止全球变暖的新能源之一。本研究尝试燃烧由锯末和伐木残渣制成的颗粒状木质生物质（生物颗粒），以热回收林业和伐木业的废物。通过热重和差热分析（TG/DTA）观察生物颗粒的脱挥特性，获得生物颗粒热解的基础数据。使用热重分析仪测量重量损失和温差。观察到生物颗粒的重量分三个阶段下降，热解过程中发生吸热反应，燃烧过程中发生放热反应。在电炉中观察生物颗粒的燃烧行为，在燃烧过程的连续步骤中进行颗粒温度和重量的视频记录和测量。考察了炉温和颗粒尺寸的影响，以阐明生物颗粒的燃烧特性，如点火延迟、燃烧周期、炭燃烧时间以及重量减少和温度升高的变化。结果表明，它们在燃烧过程的各个步骤如脱挥、点火、可见包络火焰燃烧和炭燃烧中受到影响。
From a viewpoint of environmental preservation and resource protection, the recycling of wastes has been promoting. Expectations to new energy resource are growing by decrease of fossil fuel. Biomass is one of new energies with prevent global warming. This study is an attempt to burn pelletized woody biomass (Bio-pellet) made from sawdust and logging residue in order to thermally recycle waste products of forestry and lumbering industry. The devolatilization property of Bio-pellet were observed by the thermogravimerty and differential thermal analysis (TG/DTA) to obtained fundamental data of Bio-pellet pyrolysis. The thermogravimetric analyzer was used to measure weight loss and temperature difference. It observed that the weight of Bio-pellet decreased under three stages with endothermic reaction during pyrolysis, and with exothermic reaction during combustion. The combustion behavior of Bio-pellets was observed in the electric furnace, where the video-recording and measurements of pellet temperature and weight were carried out at sequential steps of the combustion process. The effects of furnace temperature and pellet size were exam-ined in order to elucidate the combustion characteristics of Bio-pellets, such as ignition delay, burning period, char-combustion time and the change of weight decrease and temperature rise. The results indicated that they are influenced at each step of the combustion process such as devolatilization, ignition, visible envelope flame combustion and char combustion.