灰化条件对油菜秸秆灰分特性的影响  

Influence of ashing conditions on the ash characteristics of rape straw

作　　者：刘巧玲[1] 刘保华[1,2] 张强[1] 刘芳[1] 

机构地区：[1]湖南农业大学工学院,湖南长沙410128 [2]湖南省现代农业装备工程技术研究中心,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2013年第1期107-110,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省科学技术厅项目(2011NK3070);湖南省研究生科研创新项目(CX2011B274)

摘　　要：将油菜秸秆水洗处理后自然干燥,置于400、500、600、700、800、900℃分别煅烧1、3、5、7、9 h,观测灰分颜色及形态,借助X射线衍射分析(XRD)及X射线能谱分析(EDS–SEM)对灰分进行物相分析及组成成分检测。结果表明:与对照相比,水洗油菜秸秆能使SiO2的质量百分比增大60%以上,脱除50%以上的碱金属及易挥发物质,有效提高灰分熔点,降低结渣率;油菜秸秆灰分中SiO2潜在水硬活性激发最完全的条件为:油菜秸秆经水洗,在500℃下恒温煅烧5 h。Rape straw was dried naturally after washing and respectively calcined 1, 3, 5, 7 and 9 hours at 400, 500, 600, 700, 800 and 900℃. The color and the appearance of the ashes were observed, and phase analysis and ingredients detection were conducted using XRD and EDS-SEM. Results showed that compared with the non-washing, washing can reduce the alkali metal and volatile substances of the straw by about 60%, which effectively improved the ash melting point, reduced slagging rate and increased the relative content of the SiO2. Thus, the optimal experimental condition to activate potential hydraulicity of SiO2 in ash of rape straw was calcining 5 hours at 500 ℃ using washed rape straw.

关 键 词：油菜秸秆 水硬活性 灰分特性 

分 类 号：TU528.041[建筑科学—建筑技术科学]