The Wastewater Evaporation System (WES) was a reliable and economical way to treat desulfurization wastewater. However, the evaporation mechanism was not clear, and the evaporation product properties were lack of awareness. In this study, the evaporation and product properties were revealed by the single droplet drying (SDD) method and spray drying system. It was found that the evaporation process of wastewater involved the constant rate and falling rate period. The component of the evaporation product from the SDD and spray drying method were similar, mainly consisted of MgCl₂, CaCl₂, NaCl and CaSO₄. Besides, the potential risks of WES were assessed. After wastewater evaporation, the Electrostatic Precipitator (ESP) removal efficiency was enhanced due to the aggregation of fine particles and the enhanced specific resistance. For the influence of WES on comprehensive fly ash utilization, the chloride mass fraction in the final product was lower than 0.06% and could meet strict regulations.

废水蒸发系统 (WES) 是一种可靠且经济的脱硫废水处理方法。但蒸发机理尚不明确，蒸发产物的性质也缺乏认识。在这项研究中，蒸发和产品特性是通过单液滴干燥 (SDD) 方法和喷雾干燥系统来揭示的。发现废水的蒸发过程涉及恒速期和降速期。SDD和喷雾干燥法蒸发产物的成分相似，主要由MgCl ₂、CaCl ₂、NaCl和CaSO _{4 组成。}. 此外，还评估了 WES 的潜在风险。废水蒸发后，由于细颗粒的聚集和比电阻的增加，静电除尘器（ESP）的去除效率提高。对于WES对粉煤灰综合利用的影响，最终产品的氯化物质量分数低于0.06%，可以满足严格的规定。