Abstract The treatment of fine particles and desulfurization wastewater from coal-fired power plants is an important issue in the field of energy and environment. To promote the removal of fine particles and zero discharge of desulfurization wastewater, a novel treatment technology with the coupling of spray evaporation and turbulent agglomeration was proposed, and the effect of desulfurization wastewater spray on fine particles agglomeration and removal were investigated by experiment. The results showed that the spray-turbulent agglomeration system can effectively promote the agglomeration and removal of fine particles through capillary force and adhesion effect of crystals precipitated from the desulfurization wastewater droplets. After that the fine particles agglomeration efficiency was improved to 39.3%, which was 10.9% higher than single turbulent agglomeration, and the number and mass concentrations of fine particles after ESP reduced about 46.5% and 38.9%, respectively. In addition, the effect of turbulent agglomeration system on the evaporation of desulfurization wastewater was studied by simulation using CFD models, the motion trajectory, evaporation time and motion distance of spray droplets with different sizes were calculated. It indicated that turbulence can increase the relative velocity between droplets and flue gas, thus improving the heat and mass transfer rates of spray droplets in the evaporation process, so as to promote the evaporation of large-size droplets and shorten their motion distance required for complete evaporation. The average motion distance of spray droplets was shortened by 383 and 543 mm respectively at the diameter size of 110 and 120 μm.

中文翻译：

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喷雾-湍流团聚促进脱硫废水脱除细颗粒和零排放

摘要 燃煤电厂细颗粒物和脱硫废水的处理是能源与环境领域的重要课题。为促进脱硫废水的细颗粒物去除和零排放，提出了喷雾蒸发与湍流团聚耦合的处理新技术，并通过实验研究了脱硫废水喷淋对细颗粒物团聚和去除的影响。结果表明，喷雾-湍流团聚系统可以通过脱硫废水液滴中析出的晶体的毛细管力和粘附作用，有效促进细颗粒物的团聚和去除。之后细颗粒团聚效率提高到39.3%，为10。比单一湍流团聚高 9%，ESP 后细颗粒的数量和质量浓度分别降低约 46.5% 和 38.9%。此外，利用CFD模型，通过模拟研究了湍流团聚系统对脱硫废水蒸发的影响，计算了不同尺寸喷雾液滴的运动轨迹、蒸发时间和运动距离。说明湍流可以提高雾滴与烟气的相对速度，从而提高雾滴在蒸发过程中的传热传质速率，从而促进大尺寸雾滴的蒸发，缩短雾滴完全蒸发所需的运动距离。蒸发。