添加剂抑制CaSO_4高温分解的TG-FTIR研究(Ⅰ)氧化物系列  

STUDY ON THE CONSTRAINT OF ADDITIVES ON THE THERMAL DECOMPOSITION OF CaSO_4 AT HIGH-TEMPERATURE BY TG-FTIR PART (Ⅰ) OXIDE SERIES

作　　者：杨晓东[1] 武建军[1] 薛可轶[1] 沈吉敏[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州硕士生221008

出　　处：《煤炭转化》2003年第4期69-72,共4页Coal Conversion

基　　金：中国矿业大学科技基金资助项目 (OH490 4)

摘　　要：固硫产物 Ca SO4在高温下易分解 ,导致钙基固硫剂在高温下固硫率急剧下降 ,限制了燃烧过程中固硫技术在工业锅炉中的应用 ,固硫产物的稳定性是影响高温固硫率的重要因素 ,采用 TG- FTIR联用技术 ,在线测定了不同种类的添加剂对 Ca SO4高温热分解的影响规律 ,结果表明 :分别添加一定比例的 Al2 O3 ,Mg O和 Zn O等氧化物对 Ca SO4晶体在高温下 ( 1 0 0 0℃～ 1 45 0℃ )的分解有明显的抑制作用 .The desulfurization products CaSO_4 tends to decompose,which brings on the sharply decrease of desulfurization efficiency of calcium-based sorbents at high-tempreature,and limits the technology of fixation sulfur applying in the industrial boiler during the combustion.The stability of desulfurization products is the main factor of influence the desulfurization efficiency in high temperature.The experiments used the combination technology of TG and FTIR,and measured the influence rules of additives on the thermal decomposition of CaSO_4 in series.The results shows that addition of certain proportion Al_2O_3 ,MgO and ZnO to the pure CaSO_4,which will constraint the decomposition of CaSO_4 obviously at high temperature(1 000 ℃-1 450 ℃).

关 键 词：添加剂 抑制 CASO4 高温分解 TG-FTIR 氧化物 高温固硫 工业锅炉 

分 类 号：TK227.1[动力工程及工程热物理—动力机械及工程] X701.3[环境科学与工程—环境工程]