Owing to the oversimplification of the evaporation model, existing numerical analysis cannot accurately characterize the evaporation characteristics, which has limited its significance for engineering. Therefore, by user-defined programming, a droplet evaporation model in line with the properties of desulfurization wastewater was implemented in numerical simulation. The effects of guiding measures, nozzle arrangement, nozzle layer, flue gas temperature, moisture and droplet diameter on the droplet evaporation in a bypass flue were explored. The numerical results show that the fluctuation of evaporativity due to moisture can be neglected. The uniformity of the flow field with guiding measures is good and the phenomenon of droplets impinging on the wall surface can be prevented. The droplet collision probability without guiding measures may be nearly 60 times higher than that with guiding measures. A reasonable nozzle arrangement increases the droplet evaporation rate and reduces the probability of droplets colliding with the wall surface. An increased number of nozzle layers enhances the droplet evaporation rate and the average temperature in the flue; by estimation, the average temperature in the flue with three nozzle layers is 10.7 K higher than that for two nozzle layers, and 15.8 K higher than that for one nozzle layer. In the condition of higher temperature and smaller diameter, droplets evaporate more rapidly. These research results can provide a reliable reference for engineering practice.

由于蒸发模型的过于简化，现有的数值分析不能准确地描述蒸发特征，这限制了其在工程上的意义。因此，通过用户定义的程序，在数值模拟中实现了符合脱硫废水特性的液滴蒸发模型。探索了引导措施，喷嘴布置，喷嘴层，烟气温度，水分和液滴直径对旁路烟道中液滴蒸发的影响。数值结果表明，由于水分引起的蒸发性波动可以忽略。通过引导措施，流场的均匀性良好，并且可以防止液滴撞击在壁表面上的现象。没有引导措施的液滴碰撞概率可能比具有引导措施的液滴碰撞概率高近60倍。合理的喷嘴布置可提高液滴蒸发速率，并降低液滴与壁表面碰撞的可能性。喷嘴层数量的增加提高了液滴的蒸发速率和烟道中的平均温度；通过估算，三个喷嘴层的烟道中的平均温度比两个喷嘴层的烟道平均温度高10.7 K，比一个喷嘴层的烟道平均温度高15.8K。在较高温度和较小直径的条件下，液滴蒸发更快。这些研究结果可为工程实践提供可靠的参考。合理的喷嘴布置可提高液滴蒸发速率，并降低液滴与壁表面碰撞的可能性。喷嘴层数量的增加提高了液滴的蒸发速率和烟道中的平均温度；通过估算，三个喷嘴层的烟道中的平均温度比两个喷嘴层的烟道平均温度高10.7 K，比一个喷嘴层的烟道平均温度高15.8K。在较高温度和较小直径的条件下，液滴蒸发更快。这些研究结果可为工程实践提供可靠的参考。合理的喷嘴布置可提高液滴蒸发速率，并降低液滴与壁表面碰撞的可能性。喷嘴层数量的增加提高了液滴的蒸发速率和烟道中的平均温度；通过估算，具有三个喷嘴层的烟道中的平均温度比两个喷嘴层的烟道平均温度高10.7 K，比一个喷嘴层的烟道平均温度高15.8K。在较高温度和较小直径的条件下，液滴蒸发更快。这些研究结果可为工程实践提供可靠的参考。具有三个喷嘴层的烟道中的平均温度比两个喷嘴层的烟道平均温度高10.7 K，比一个喷嘴层的烟道平均温度高15.8K。在较高温度和较小直径的条件下，液滴蒸发更快。这些研究结果可为工程实践提供可靠的参考。具有三个喷嘴层的烟道中的平均温度比两个喷嘴层的烟道平均温度高10.7 K，比一个喷嘴层的烟道平均温度高15.8K。在较高温度和较小直径的条件下，液滴蒸发更快。这些研究结果可为工程实践提供可靠的参考。