Magnesia base catalyst flue gas denitrate performance study

To control contamination of flue gas emission NOx, the author mixcd method of preparing new magnesia base catalyst and researched on denitrificating fine gas by directness catalytic decomposition. Usually removal rate of NO is regarded on the main evaluation criteria. The author analyzed calcination temperature of catalyzer manufacturing process, the temperature of flue gas desorption tower, bed height and efficiency denitrification of NO concentration. And discussed the result of both denitrate lore-and-aft of FT-IR and XRD. The experiment indicates that magnesia base catalyst is available to directness catalytic decomposition denitrificate flue gas. Through denitrification rate is from 85% to 95%. The ingredient of magnesia base catalyst is made from magnesia, firming agent, addition agent. Height denitration bed was 4 cm- 5 cm, deuitration reaction temperature is 130℃-170℃, through the analyses above, presumed that magnesia base catalyst exist activating of vice, and analyzed this vice preliminarily.

基于改进最小二乘法的SCR脱硝系统模型辨识

针对某电厂600 MW机组选择性催化还原(SCR)烟气脱硝系统,基于平方误差损失函数(SELF)提出了一种新的衰减记忆递推最小二乘(FMRLS)算法来进行模型辨识。并采用直接法确定不同运行工况下闭环系统的模型参数和延迟时间。改进前后辨识模型的输出与实际运行数据的对比结果表明,该方法具有偏差范围小、收敛速度快、精度高等优点,验证了模型的有效性,为喷氨自动控制和降低NOx排放提供了模型参考。

氧化镁基催化剂及脱硝性能研究

为控制燃烧烟气中NOx的污染，对共混合方法制备的氧化镁基催化剂进行烟气直接催化分解法脱硝实验研究，分析模拟烟气脱硝塔内温度及床层高度及氧气浓度、NO浓度和空速对脱硝效率的影响。研究表明：氧化镁基催化剂可以采用直接催化分解法对烟气脱硝，脱硝率85％～95％，氧化镁基催化吸附剂组成为氧化镁、固化剂、添加剂；脱硝的床层高度4～5cm，脱硝反应温度130—170℃，烟气空速2500—3000h^-1；研究推测出氧化镁基催化剂存在活性缺陷，并对脱硝机理进行了初步分析。

氧化镁基催化吸附剂的制备及脱硝性能研究

采用共混合法制备氧化镁基催化吸附剂,通过正交实验设计找出其组分的最佳配比。利用该催化吸附剂对烟气进行脱硝实验,考察了焙烧温度、焙烧时间和床层温度对氧化镁基催化吸附剂去除NO的影响。结果表明,利用氧化镁基催化吸附剂可以对烟气进行直接催化分解脱硝,其最佳的焙烧温度和时间分别为350～500℃和3～4h,脱硝率可达85%～95%。利用红外光谱(FT-IR)、X射线衍射(XRD)对脱硝处理前后的氧化镁基催化吸附剂进行了分析,探讨其脱硝的机制。