摘要
利用管式炉在空气气氛下进行了废弃印刷线路板的燃烧试验,研究了温度、钙基添加剂、硫,以及不同的Ca/Br摩尔比和S/Br摩尔比对溴的迁移转化的影响。试验结果表明,随着温度的升高,烟气中HBr的转化率降低,而溴分子的转化率升高,且溴分子的转化率始终高于HBr的转化率;钙基添加剂对烟气中HBr的转化率影响不大,但基本上能促进残渣中的溴向烟气中的溴分子转化,效果随着Ca/Br摩尔比的增加有所变化;硫的添加能够有效促进烟气中的溴分子向HBr转化,也能降低烟气中无机溴的转化率。
The combustion experiment of waste printed circuit boards was proceeded in air atmosphere by using a quartz tube furnace.Some influencing factors on the transfer and conversion of bromine were investigated,including temperature,different calcium base additives,sulfur,different Ca/Br molar ratio and different S/Br molar ratio.The results indicated that as temperature increased,the conversion rate of HBr in flue gas reduced,while that of bromine molecular in flue gas increased,and the latter was always higher than the former.This might be because of the HBr being oxidized at high temperature environment.Calciwm base additives had little influence on the conversion rate of HBr in the flue gas,but all promoted bromine in the residue transferring to bromine molecular in flue gas,and the promoting effect changed with Ca/Br molar ratio changing.Sulfur＇s effect was remarkable.On the one hand,it promoted bromine molecular in flue gas conversing to HBr in flue gas,on the other hand,it also reduced the conversion rate of the inorganic bromine in flue gas.
出处
《能源工程》
2013年第3期59-65,共7页
Energy Engineering
关键词
印刷线路板
温度
Ca
Br摩尔比
硫
转化率
printed circuit boards
temperature
Ca/Br molar ratio
sulfur
conversion rate
