Aiming at the accuracy and adaptability of the structure model and numerical model of the selective catalytic reduction (SCR) denitration device and the uniformity reaction in it, the characteristic structures affecting the accurate calculation of the flue gas flow field, the method and rationality of the parameter setting used in the porous medium model, the theory and rationality of parameter setting used in the multi-component reaction model were analyzed by comparing numerical simulation and experiment. Based on the numerical simulation, a method for adjusting the distribution of ammonia spray was established to improve the uniform distribution of NO_x in the outlet flue section. The results showed that the economizer export structure and the ammonia injection grid (AIG) structure had a significant impact on the accuracy of calculating the flue gas flow field. The relative errors of the pressure drop and the efficiency of removal in the numerical simulation and experiment were -1.4% and -1.5%, respectively. The ultra-low emission of NO_x concentration was realized in the numerical simulation based on increasing the standby layer catalyst and adjusted the distribution of ammonia spray.

中文翻译：

---

研究NO超低排放调整处理的_X在选择性催化还原系统基于数值计算与试验

针对选择性催化还原脱硝装置的结构模型和数值模型的准确性和适应性以及其中的均匀反应性，影响烟气流场准确计算的特征结构，方法及合理性。通过数值模拟和实验比较，分析了多孔介质模型中参数设定的适用性，分析了多组分反应模型中参数设定的理论和合理性。基于数值模拟中，建立了用于调整氨喷雾的分布的方法，以提高NO的均匀分布_X在出口烟道部分。结果表明，省煤器出口结构和氨注入格栅（AIG）结构对计算烟气流场的准确性有重大影响。在数值模拟和实验中，压降和去除效率的相对误差分别为-1.4％和-1.5％。NO的超低排放_X浓度在基于增加备用层催化剂的数值模拟实现和调整氨喷雾的分布。