基于CFD数值模拟的SCR脱硝反应器入口烟道优化分析

An Analysis on the Optimisation for Entrance Flue of an SCR Denitrification System Based on CFD Simulation

脱硝反应器入口烟道的设计对脱硝性能的影响尤为重要。以某1000MW燃煤机组烟气脱硝系统为原型，采用计算流体动力学（CFD）仿真手段对系统入口烟道的设计优化进行研究。通过对首层催化剂上方速度分布均匀性计算分析，得出入口烟道楔形结构倾斜角度10°≤α≤17°为较优方案，可为脱硝系统工程设计提供技术支持与指导。

Design of entrance flue of the denitrification system in a 1,000-megawatt coal-fired power plant was studied and optimised via a computational fluid dynamics （CFD） simulation method. Through the calculation and analysis on the uniformity of flue gas flow speed distribution above the first catalyst layer, an optimal option was found that tilt angles of the entrance flue wedge structure in range between 10° and 17° could be a helpful guidance on the design for a denitrification system.