【摘要】 采用粉煤灰替代拌煤粘土做粘结剂,CaCO3做固氟剂,制作蜂窝煤,进行燃煤氟污染控制研究。结果表明:粉煤灰能显著降低蜂窝煤燃烧的氟逸出量,氟减排率达39.8%;轻质碳酸钙在以粉煤灰为粘结剂的蜂窝煤中固氟效果显著,固氟率随着CaCO3增加而升高,当粉煤:粉煤灰:CaCO3:拌煤粘土为80∶10∶10∶0时CaCO3固氟效果最佳,固氟率达39%,氟减排率达81.3%;拌煤粘土能改善轻质碳酸钙在以粉煤灰做粘结剂的蜂窝煤中的固氟性能,当粉煤∶粉煤灰∶CaCO3∶拌煤粘土为80∶2∶8∶10时,固氟率达38%.更多还原

【Abstract】 To control fluoride pollution from coal combustion,fly ash substituting for clay was selected as composition for the preparation of honeycomb briquette,and CaCO3 was used for calcium-based sorbent.The results indicate that fluoride pollution from honeycomb briquette combustion was effectively reduced by fly ash which substituted for clay,and the largest fluorine emission reduction rate is 39.8%.Light calcium carbonate could also effectively reduce fluoride pollution from honeycomb briquette combustion in which fly ash was used as the agglomerant,fixation rate of fluoride increased with the contents of light calcium carbonate increasing.In the experiments,the optimum proportions of coal: fly ash: CaCO3: clay was 80∶10∶10∶0,and fluoride fixation rate reached to 39%,the fluoride of emission reduction rate was 81.3%.Clay can improve the efficiency of CaCO3 fixed fluorine when honeycomb briquette with fly ash binder burning,when coal: fly ash:CaCO3:clay was 80∶2∶8∶10,and the fluoride retention rate was 38%.更多还原