改性粉煤灰在酸雾治理方面的研究

为去除化工生产等过程中产生的酸雾废气,首先用水作用法、微波法和传统湿法对粉煤灰进行改性试验,结果显示:传统湿法中的碱法效果最佳,改性后粉煤灰的BET比表面积是改性前的8.23倍.再用改性后的粉煤灰与廉价易得的天然矿物沸石和熟石灰作为活性组分,制得一种新型的复合吸附剂.常温常压下,动态吸附盐酸雾,实验结果表明:由改性粉煤灰制作的吸附剂G对盐酸雾的吸附性能比未经改性的吸附剂W有所提高,在文中所述条件下,饱和吸附量由改性前的331.4 mg/g提高到改性后的445.2 mg/g.

Study on modified fly-ash for the removal of acid mist waste gas

To remove the acid mist waste gas produced from chemical production, the water effect, microwave and traditional wet methods were used to modify the properties of the fly-ash.The results indicate that the alkali method of the traditional wet method is the best way and the corresponding BET specific surface is 8.23 times than before. The new adsorbent used to remove acid mist was made of the modified fly-ash, cheap natural minerals zeolite and slaked lime, under normal temperature and pressure, the results showed that the adsorbent named G made from the modified fly-ash performed better in HCl acid mist adsorption than the adsorbent named W, which was made from raw fly-ash. Under the specific condition, the total adsorption quantities of W and G are 331.4 mg/g and 445.2 mg/g.