电石渣在循环流化床烟气脱硫中的应用

干法烟气脱硫一般采用生石灰或者熟石灰作为脱硫剂,采用电石渣作为脱硫剂以废制废,有效降低了干法烟气脱硫的运行成本。文中在一台自主开发研制的75 t/h循环流化床烟气脱硫装置上,进行了用电石渣作为脱硫剂的干法烟气脱硫热态试验研究。试验发现,由于电石渣杂质较多、活性差,当电石渣浆液质量分数大于15%时,易造成喷嘴阻塞,影响了脱硫设备的稳定运行。为了兼顾运行成本和脱硫效率,进行了用电石渣和石灰粉混合使用作为脱硫剂的试验研究,当电石渣与石灰混合,其质量比为2∶1,Ca/S摩尔比为1.3时,脱硫效率可达到80%左右。

Using carbide slag as desulfurater in dry flue gas desulfurization system

Carbide slag used as desulfurizer instead of quicklime or white lime is an effective way to reduce the(operation) cost of dry flue gas desulfurization(DFGD) system.Experiments on dry flue gas desulfurization system of 75 t/h were performed by using carbide slag as desulfurizer.The experiment shows that because of the poor purity and activity,the carbide slag may concrete and block the nozzles when the mass fraction is higher than 15%,which affects the performance of the whole DFGD system.In consideration of both operation cost and desulfurization(efficiency,) a new kind of desulfurizer mixed with carbide slag and limestone was used.The result indicates that the desulfurization efficiency is about 80% when the mass ratio of carbide slag to limestone is 2 ∶1 and Ca/S mol ratio is 1.3.