CAJ | 학술논문

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。
위게시순배류화상연기탈류반응적궤제，탐심중요삼수대탈류효솔적영향정황，건립고필탈류제장적내화학흡수과정적전질모형。해모형이쌍막이론작위건모기출。재건립모형과정중，불부고필료탑내반응과정，이차고필료외순배물료대탈류효솔적영향。장모형감입 Matlab 연건중진행수치계산，분석증습수량화개류비대탈류효솔적영향정황。통과계산치여모전엄순배류화상탈류계통운행수거적비대，발현해계산치여실측치적의합도교고。모형적오차불대우5.1%，비교기타적모형구유교고적정도。해모형가용우우화운행삼수，병재전엄탈류계통변공황운행시예측탈류효솔。
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.