摘要
为揭示循环流化床烟气脱硫反应的机制,探寻重要参数对脱硫效率的影响情况,建立考虑脱硫剂浆滴内化学吸收过程的传质模型。该模型以双膜理论作为建模基础。在建立模型过程中,不仅考虑了塔内反应过程,而且考虑了外循环物料对脱硫效率的影响。将模型嵌入Matlab软件中进行数值计算,分析增湿水量和钙硫比对脱硫效率的影响情况。通过计算值与某电厂循环流化床脱硫系统运行数据的比对,发现该计算值与实测值的拟合度较高。模型的误差不大于5.1%,比较其他的模型具有较高的精度。该模型可用于优化运行参数,并在电厂脱硫系统变工况运行时预测脱硫效率。
To reveal the reaction mechanism of flue gas desulfurization in a circulating fluidized-bed boiler and investigate the influence of some important parameters on the efficiency of desulfurization,a mass transfer model was established with the chemical absorption process inside the desulfurizing slurry drops being taken into account.The model was based on the two-film theory.During establishment of the model,both the influence of reaction process inside the tower and that of externally circulating material on desulfurization efficiency were both considered in the model.The model was embedded in the software of Matlab to carry out numerical calculation,by which the effects of humidifying water amount and calcium/sulfur ratio on desulfurization efficiency were analyzed.Compared with the operating data of a CFB desulfurization system,the calculated results were found agreed well with the measured values.The model has a higher accuracy than other models with a max error of 5.1%.The model can be used to optimize operating parameters and to predict desulfurization efficiency when a desulfurization system operates under varied conditions.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第26期8-13,1,共6页
Proceedings of the CSEE
关键词
循环流化床
双膜理论
传质模型
MATLAB
脱硫效率
circulating fluidized bed
two-film theory
mass transfer model
Matlab
desulfurization efficiency
