Ultrasound enhanced evaporating crystallization has been proposed to solve the problems of low crystallization yield and uneven particle size in the evaporating crystallization process of ammonium sulfate solution at atmospheric pressure. The effects of key operating parameters, including the ultrasound power, stirring speed, pH value, and ultrasound time, on the yield of ammonium sulfate product and the duration of solid–liquid transformation time are studied. The results show that the ultrasound crystallization can increase the ammonium sulfate yield by 52.9 %, reduce the solid–liquid transformation time of ammonium sulfate by 10 %, and obtain ammonium sulfate products with higher crystallinity and more uniform particle size. Ultrasound promotes the crystallization of ammonium sulfate by enhancing the transfer of heat in the solution and reducing the supersolubility of the ammonium sulfate solution from 937.5 g/L to 833.33 g/L. This study provides experimental justification for the use of ultrasound in atmospheric evaporative crystallization.

中文翻译：

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超声波作用下常压硫酸铵蒸发结晶效果


针对常压硫酸铵溶液蒸发结晶过程中结晶收率低、粒径不均匀的问题，提出超声强化蒸发结晶技术。研究了超声功率、搅拌速度、pH值和超声时间等关键操作参数对硫酸铵产品收率和固液转化时间的影响。结果表明，超声结晶可使硫酸铵收率提高52.9%，减少硫酸铵固液转化时间10%，获得结晶度更高、粒度更均匀的硫酸铵产品。超声波通过增强溶液中的热传递并将硫酸铵溶液的超溶解度从 937.5 g/L 降低至 833.33 g/L 来促进硫酸铵结晶。这项研究为超声波在大气蒸发结晶中的使用提供了实验依据。