摘要
介绍了棉秆的物理、化学特性,30～50mm棉秆和床料混合物的临界流化速度,以及棉秆热解、燃烧的热重试验结果,重点研究棉秆流化床燃烧时的温度分布,并利用ICP技术对灰组成进行了分析,得出棉秆流化床燃烧时碱金属的析出特性.分析表明,棉秆着火温度低,挥发分析出速度快,部分碱金属流化床燃烧时以挥发态析出,其中钾元素析出比例最大,飞灰中碱金属成分含量较高,对高温对流受热面的沾灰可能性很大.
The basic characteristics of cotton stalk were reported. The critical fluidization velocity of the mixture of cotton stalk and bed material was obtained by experiment. The thermogravimetrie experiments of cotton stalk pyrolysis and combustion were also conducted. The thermogravimetric analyzer can provide the key data, which provide a powerful way to obtain the combustion characteristics correctly. Cotton stalk can be ignited easily at the lower temperature, and its devolatilization is prompt. The composition of ash is finally analyzed using ICP（inductively coupled plasma） in this paper, which shows that the high content of alkali metals in cotton stalk is potentially hamtful with regard to corrosion.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2008年第2期147-151,共5页
Journal of Combustion Science and Technology
基金
国家重点基础研究发展计划(973)资助项目(2007CB210208)
关键词
棉秆
流化床燃烧
热重分析
燃烧特性
碱金属
cotton stalk
fluidized bed combustion
thermogravimetric analyses
combustion characteristics
alkali metal
