贝壳与石灰石脱硫特性的试验研究  

Experimental study on the desulphurization of shell and limestone

作　　者：程世庆[1] 施正伦[1] 骆仲泱 方梦祥[1] 程乐鸣[1] 岑可法[1] 

机构地区：[1]能源洁净利用与环境工程教育部重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2003年第2期221-224,共4页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(59976019).

摘　　要：利用LCT-2型热天平对4种贝壳和2种石灰石脱硫剂的脱硫特性进行了试验研究,利用压汞仪对试验样品的微观结构进行了测定.贝壳的化学成分与石灰石相似,其CaO质量分数在54%以上,脱硫性能有相似之处,但贝壳比石灰石有较好的微孔结构,贝壳型CaO的内部孔径多数在0.2～4.2μm之间,而石灰型CaO的孔径多数在0.016～0.16μm之间,使气体在贝壳内部的扩散阻力较小,有利于脱硫剂的完全反应,钙利用率较高.试验得到贝壳的最大钙利用率可达71%,而石灰石的钙利用率只有43%.同时贝壳还具有较高的最佳脱硫温度和较好的耐烧结性能.Thermal gravimetric analysis (TGA) is carried out on the desulphurization characteristic of 4 kinds of shell and 2 kinds of limestone, Pore master mercury porosimeter is used to measure the pore diameter distribution of the test samples .It is revealed that the dusulphurization characteristic of shell is similar to those of limestone with somewhere the same composition, but that the micro-pore structure of shell was better than that of limestone. The shell pore diameter was 0.2-4.2 μm while the limestone pore diameter was 0.016-0.16 μm, so the resistance of gas diffusing through shell could be reduced, which was favorable for the whole reaction and calcium utilization of desulphurizer. The maximum calcium conversion ratio of shell was about 71% while that of limestone was abut 43%. Compared to limestone, the suitable desulphurization temperature of shell was higher and the anti-sintering performance was better.

关 键 词：贝壳 石灰石 脱硫 热重分析 

分 类 号：X511[环境科学与工程—环境工程]