石灰石和灰化温度对燃煤中重金属固定率影响的实验研究

Effects of limestone and ashing temperature on the fixed rate of heavy metals during coal combustion

文章探究了石灰石的添加量和灰化温度对燃煤中重金属元素Zn、Cu、Cd固定率的影响。结果表明,随着石灰石比例的增加,Zn、Cu、Cd的固定率呈上升趋势,变化量大小为Cd>Zn>Cu;随着温度的升高,Zn、Cu、Cd的固定率先上升后下降,900℃时的固定效果要优于800℃和1000℃。

Experiments with the addition of limestone and the change of ashing temperature were carried out. Its aim is to explore the influence of limestone and ashing temperature on the deposit of Zn,Cu,and Cd in ash. The results show that there exists a positive correlation between the addition of limestone and the element- fixed amount of Zn,Cu,Cd in ash. The size of variation Cd 〉 Zn 〉 Cu.With the increase of temperature,the element- fixed content rise in the first then fall. Ashing temperature 900℃ gave a better result than 800℃,1000℃ for the deposit of Zn,Cu,Cd.