The absorbent composing of Bayer red mud and water was prepared and applied to removing SO2 from flue gas.Effects of the ratio of liquid to solid(L/S),the absorption temperature,the inlet SO2 concentration,the O2 conc...The absorbent composing of Bayer red mud and water was prepared and applied to removing SO2 from flue gas.Effects of the ratio of liquid to solid(L/S),the absorption temperature,the inlet SO2 concentration,the O2 concentration,SO4^2-and other different components of Bayer red mud on desulfurization were conducted.The mechanism of flue gas desulfurization was also established.The results indicated that L/S was the prominent factor,followed by the inlet SO2 concentration and the temperature was the least among them.The optimum condition was as follows:L/S,the temperature and the SO2 concentration were 20:1,25℃and 1000 mg/m^3,respectively,under the gas flow of 1.5 L/min.The desulfurization efficiency was not significantly influenced when O2 concentration was above 7%.The accumulation of SO4^2-inhibited the desulfurization efficiency.The alkali absorption and metal ions liquid catalytic oxidation were involved in the process,which accounted for 98.61%.展开更多
针对石灰石-石膏湿法烟气脱硫系统(wet flue gas desulfurization, WFGD)工作过程中浆液pH难以精准测量、不利于WFGD作业的问题,建立一种基于双向门控循环单元的脱硫系统pH预测模型。首先,对原始数据进行清洗和归一化处理;其次,基于最...针对石灰石-石膏湿法烟气脱硫系统(wet flue gas desulfurization, WFGD)工作过程中浆液pH难以精准测量、不利于WFGD作业的问题,建立一种基于双向门控循环单元的脱硫系统pH预测模型。首先,对原始数据进行清洗和归一化处理;其次,基于最大信息系数分析得出13个特征值为输入变量,pH为输出变量,并建立浆液pH模型;最后,运行模型,并对结果进行评价。研究结果显示,与长短期记忆和门控循环相比,所选用的数学模型的平均绝对误差分别下降了11.95%、24.92%,均方根误差分别下降了10.64%、19.49%,决定系数分别提高了1.79%、3.08%。表明基于双向门控循环单元的pH预测模型具有较高的精确度和稳定性,具有工程应用价值,为现有脱硫塔pH预测模型提供了工程参考。展开更多
基金Project(2017YFC0210500)supported by the National Key Technology R&D Program of ChinaProject(2017ACA092)supported by the Major Projects of Technical Innovation in Hubei Province,China
文摘The absorbent composing of Bayer red mud and water was prepared and applied to removing SO2 from flue gas.Effects of the ratio of liquid to solid(L/S),the absorption temperature,the inlet SO2 concentration,the O2 concentration,SO4^2-and other different components of Bayer red mud on desulfurization were conducted.The mechanism of flue gas desulfurization was also established.The results indicated that L/S was the prominent factor,followed by the inlet SO2 concentration and the temperature was the least among them.The optimum condition was as follows:L/S,the temperature and the SO2 concentration were 20:1,25℃and 1000 mg/m^3,respectively,under the gas flow of 1.5 L/min.The desulfurization efficiency was not significantly influenced when O2 concentration was above 7%.The accumulation of SO4^2-inhibited the desulfurization efficiency.The alkali absorption and metal ions liquid catalytic oxidation were involved in the process,which accounted for 98.61%.
文摘针对石灰石-石膏湿法烟气脱硫系统(wet flue gas desulfurization, WFGD)工作过程中浆液pH难以精准测量、不利于WFGD作业的问题,建立一种基于双向门控循环单元的脱硫系统pH预测模型。首先,对原始数据进行清洗和归一化处理;其次,基于最大信息系数分析得出13个特征值为输入变量,pH为输出变量,并建立浆液pH模型;最后,运行模型,并对结果进行评价。研究结果显示,与长短期记忆和门控循环相比,所选用的数学模型的平均绝对误差分别下降了11.95%、24.92%,均方根误差分别下降了10.64%、19.49%,决定系数分别提高了1.79%、3.08%。表明基于双向门控循环单元的pH预测模型具有较高的精确度和稳定性,具有工程应用价值,为现有脱硫塔pH预测模型提供了工程参考。
