摘要
为了更精确地对锅炉飞灰含碳量进行在线监测,本文搭建了1.0～4.0 GHz微波在线检测实验平台,研究了飞灰含碳质量与微波功率衰减的关系.实验发现:飞灰含碳质量与微波功率衰减关系有三种趋势:第一种是正比线性趋势,主要分布频段为1.0～1.5 GHz和2.0～2.4 GHz;第二种是波动趋势,主要分布在频段2.5～4.0 GHz内;第三种是反比线性趋势,主要分布在频段1.6～1.9 GHz内。文中从电导率损耗以及谐振吸收理论出发,对其形成机理做了详细的分析。
1.0 - 4.0 GHz microwave on-line detection experimental platform is constructed in the paper to monitor the carbon content of fly ash on line more accurately. The relation between carbon content in fly ash and attenuation of microwave is studied and experimental results show that there are three trends of the relation. The first one is proportional linear, which distributes in the frequency band of 1.0 - 1.5 GHz and 2.0 - 2.4 GHz. Fluctuation trend mainly exists at 2.5 - 4.0 GHz. In the frequency band of 1.6 - 1.9 GHz, there is a linear and inverse relation between them. A detailed analysis of formation mechanism is given based on the theories of electrical conductivity loss and resonance absorption.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第3期533-536,共4页
Journal of Engineering Thermophysics
基金
国家重点基础研究发展计划项目(No.2005CB221206)
"十一五"国家科技支撑计划(No.2006BAK02B03)
关键词
飞灰含碳量
微波
功率衰减
频率
carbon content of fly ash
microwave
attenuation of power
frequency
