循环高速流态化反应器低温脱硫研究

RESEARCH ON LOW TEMPERATURE DESULFURIZATION BY A CIRCULATING HIGH VELOCITY FLUID BED REACTOR

介绍了用循环高速流态化反应器促进在潮湿气氛中氧化钙与SO2反应的研究成果。实验证明,在影响脱硫率的诸因素中,钙硫比、气体相对湿度和SO2浓度作用最大,反应温度次之,气速(075～125m/s范围内)影响最小。实验还表明:按指定的钙硫比(15～25),将氧化钙加入反应器后,脱硫率不断上升,在20min达到了45%～50%,远远超过相似条件下气流床脱硫率20%的水平;继续加料至第40min时,脱硫率已上升到75%,并有继续升高的潜力。介绍了用循环高速流态化反应器促进在潮湿气氛中氧化钙与SO2反应的研究成果。实验证明,在影响脱硫率的诸因素中,钙硫比、气体相对湿度和SO2浓度作用最大,反应温度次之,气速(075～125m/s范围内)影响最小。实验还表明:按指定的钙硫比(15～25),将氧化钙加入反应器后,脱硫率不断上升,在20min达到了45%～50%,远远超过相似条件下气流床脱硫率20%的水平;继续加料至第40min时,脱硫率已上升到75%,并有继续升高的潜力。

This paper describes the development of a circulating high velocity fluid bed reactor accelerating the reaction of CaO and SO 2 under humid atmosphere. Tests show that,in the various factors affecting the SO 2 removal,the Ca/S ratio,the relative humidity and SO 2 concentration of the gas are most important,reaction temperature the less,and the gas velocity(in a range of 0 75～1 25m/s)the least. Desulfurization experiments show that with the feeding of CaO into the gas at a specified Ca/S ratio,the sulfur removal steadily increases and reaches 40～45%(depending on the operating parameters)at the 20 th min which far exceeds the 20% removal in a conventional entrained flow reactor under similar conditions. With the further feeding of CaO,the sulfur removal rises to 75% at the 40 th min,with the potential of even higher removal if the feeding continues.