Comparative study on SO_2 release and removal under air and oxy-fuel combustion in a fluidized bed combustor  

流化床空气和富氧燃烧气氛下SO_2的释放和脱除特性比较研究（英文）

作　　者：郑志敏[1] 王辉[1] 杨利[1] 魏星[1] 郭永军[1] 郭帅[1] 吴少华[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《Journal of Southeast University(English Edition)》2015年第2期232-237,共6页东南大学学报（英文版）

基　　金：The National Natural Science Foundation for Young Scholars of China(No.51106038);the National Key Technology R&D Program of China during the 12th Five-Year Plan Period(No.2012BAA02B01-04)

摘　　要：SO2 release and removal were studied under both the air and oxy-fuel combustion conditions using an anthracite coal from the Jincheng mine in China on a bench-scale fluidized bed combustor （FBC）. Special attention was paid to the effects of the combustion atmosphere, 02 concentration, bed temperature, and limestone addition. The released amount of SO2 was clearly higher under 30% 02/70% CO2 than that of the air atmosphere. As the O2 concentration in O2/CO2 mixture increased from 21% to 40%, the released amount of SO2 increased significantly, but then it decreased when the 02 concentration increased up to 50%. The bed temperature from 860 to 920 ℃ has no obvious influence on the the SO2 release but shows a strong influence on the desulfurization with limestone in both oxy-fuel and air conditions. The maximum SO2 removal efficiency appears to be at 880 to 900 ℃ for both the air and oxy-fuel combustion conditions.在一个小型流化床试验台上比较了晋城无烟煤在空气和富氧燃烧下SO2的释放和脱除特性，考察了燃烧气氛、氧浓度、床温和石灰石的添加等因素的影响．研究结果表明：在30％0，的富氧燃烧条件下SO2的释放量明显高于其在空气燃烧条件下的释放量；随着富氧燃烧气氛中O2浓度的增加（从21％增至40％），SO2的释放量显著增加，当氧浓度达到50％时，SO2的释放量有下降的趋势．床温860～920℃对SO2的释放没有明显的影响，但对其脱除有显著的影响．在空气和30％ O2富氧气氛下，SO2的最佳脱硫温度均为880～900℃．

关 键 词：oxy-fuel combustion fluidized bed SO2 release limestone desulfuration 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]