Behavior of Fluorine in the Combustion of Chinese Coal in Small Furnaces
Behavior of Fluorine in the Combustion of Chinese Coal in Small Furnaces
复制标题
氟在中国小型煤炉燃烧中的行为
DOI：
10.1021/ef050326z
复制
发表时间：
2006
期刊：
影响因子：
5.3
通讯作者：
M. Sadakata
中科院分区：
文献类型：
--
作者：
Dan Liu;Y. Sakai;Mitsuo Yamamoto;M. Sadakata
随着中国氟污染问题的日益严重，燃煤系统氟排放的研究变得越来越重要。在中国的一些农村地区，室内氟污染尤其是炉灶使用高氟煤造成的。结果，许多居民患上了氟斑牙和氟骨症。本研究利用X射线衍射仪对煤中无机氟化物的存在方式进行了分析。分析结果表明，我国煤中无机氟化物主要以白云母和磷灰石形式存在。在石英管炉中测量了挥发分和焦炭燃烧过程中船体排放气体中的氟浓度。通过对SO2的连续监测，确定了挥发分和焦炭燃烧的时间。不同燃烧条件下的实验结果表明，随着氧气浓度和温度的增加，废气中的氟化物含量增加。
Research into fluoride emissions from coal-combustion systems is becoming increasingly important as the issue of fluoride pollution in China becomes more serious. In some rural areas in China, indoor fluoride pollution has particularly been caused by the use of high fluorine content coal in stoves. As a result, many residents suffer from dental fluorosis and bone fluorosis. In this study, X-ray diffraction (XRD) analysis was carried out to confirm the mode by which inorganic fluorides exist in such coals. Analytical results showed that inorganic fluorides in Chinese coals exist mainly as muscovite and apatite. The fluorine concentration in gases emitted from a boat in a quartz tube furnace was measured during combustion of volatile matter and char. The times for volatile matter and char combustions were determined through continuous monitoring of SO2. Experimental results under different combustion conditions showed that fluoride in the emitted gas increased with an increase in oxygen concentration and te...