As an effective method to remove fine particulate matter (FPM) in coal-fired industries, the aerodynamic agglomeration has recently received increasing attention due to its application value. In this paper, a CFD–PBM coupled model of the particle agglomeration for industrial application was developed to predict the particle size distributions (PSDs) using Eulerian multiphase approach and Population Balance Model. Three kinds of particles with different inertia (i.e. inertialess, finite inertial, and inertial) and Brownian motion were considered, and a collision efficiency was induced to modify the kernel functions. Furthermore, the impacts of inlet velocity, initial particle concentration and flow field on the PSDs and the agglomeration efficiency were investigated. The results show that the agglomeration efficiencies of particulate matters with aerodynamic diameter [Formula: see text] 2.5[Formula: see text][Formula: see text]m and [Formula: see text] 10[Formula: see text][Formula: see text]m (i.e. PM[Formula: see text] and PM[Formula: see text]) both present logarithmic curves with the inlet velocity or the initial particle concentration. Under the working condition of the calculation, the optimal inlet velocity is in the range of 11–15[Formula: see text]m[Formula: see text][Formula: see text][Formula: see text]s[Formula: see text], and the optimal agglomeration efficiency of [Formula: see text] and [Formula: see text] is about 40%. The aerodynamic agglomerator is suitable for the traditional coal-fired power plants and cement plants, but it is not recommended when the initial particle concentration is less than 16.9[Formula: see text]g[Formula: see text][Formula: see text][Formula: see text]m[Formula: see text]. The analysis of the flow field shows that the longitudinal edge of the vortex and the windward side of the vortex generator are the main regions where particles agglomerate.

中文翻译：

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使用 CFD-PBM 耦合模型模拟和优化气动凝聚器中的颗粒凝聚

作为燃煤工业中去除细颗粒物（FPM）的有效方法，气动团聚由于其应用价值而受到越来越多的关注。在本文中，开发了用于工业应用的颗粒团聚的 CFD-PBM 耦合模型，以使用欧拉多相方法和种群平衡模型来预测颗粒尺寸分布 (PSDs)。考虑了三种不同惯性（即无惯性、有限惯性和惯性）和布朗运动的粒子，引入了碰撞效率来修正核函数。此外，还研究了入口速度、初始颗粒浓度和流场对 PSDs 和团聚效率的影响。结果表明，空气动力学直径[公式：见文]2.5[公式：见文][公式：见文]m和[公式：见文]10[公式：见文][公式：见文]m（即PM[公式：见文]和PM[公式：见文]）均呈现与入口速度或初始粒子浓度的对数曲线。在计算的工况下，最佳进气速度在11-15范围内[公式：见文]m[公式：见文][公式：见文][公式：见文]s[公式：见文text]，[公式：见文]和[公式：见文]的最佳集聚效率约为40%。气动凝聚器适用于传统的燃煤电厂和水泥厂，但不建议当初始粒子浓度小于16.9[公式：见文]g[公式：见文][公式：见文][公式：见文]m[公式：见文]。流场分析表明，涡流纵向边缘和涡流发生器迎风侧是颗粒团聚的主要区域。