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Experimental and numerical investigation on evaporation characteristics of high salinity wastewater by rotary spray
Desalination ( IF 9.9 ) Pub Date : 2021-07-26 , DOI: 10.1016/j.desal.2021.115263
Xin Liu 1, 2 , Shi Bu 1, 2 , Lin Zhang 1, 2, 3 , Yuzhu Zhou 1, 2 , Jiamei Fang 1, 3 , Chengcheng Shi 1, 3 , Weigang Xu 1, 2 , Chen Xu 4
Affiliation  

Zero Liquid Discharge (ZLD) of high salinity wastewater is always an important subject in the field of energy and environment. In order to improve the evaporation rate, the mass and heat transfer characteristics of the rotary spray evaporation technology in the treatment of high salinity wastewater are explored. The relationship between the evaporation characteristics of wastewater and various parameters such as hot air flow rate, hot air temperature, feed flow rate, atomizing disk rotating speed and feed liquid concentration change is studied by experiment and simulation. It is concluded that the hot air temperature and hot air flow rate are important factors affecting the evaporation effect of the system. The atomizing disk rotating speed and the feed flow rate have a great influence on the atomization effect of the atomizer. A fluid recirculation area is generated around the atomizing disk, which allows droplets to reside longer in the evaporation chamber, thus improving the evaporation efficiency. Compared with other factors, the effect of feed liquid concentration on atomization and evaporation is relatively small. Finally, a better process operation condition is obtained through research: the atomizing disk rotating speed is 24,000 r/min, the feed flow rate is 4.5 kg/h, the hot air temperature is 498 K, and the hot air flow rate is 80 m3/h.



中文翻译:

高盐度废水旋转喷雾蒸发特性的实验与数值研究

高盐度废水的零液体排放(ZLD)一直是能源与环境领域的重要课题。为提高蒸发率,探讨了旋转喷雾蒸发技术在处理高盐度废水中的传质传热特性。通过实验和模拟,研究了废水蒸发特性与热风流量、热风温度、进料流量、雾化盘转速、进料液浓度变化等各种参数之间的关系。得出结论,热风温度和热风流量是影响系统蒸发效果的重要因素。雾化盘转速和进料流量对雾化器的雾化效果影响很大。雾化盘周围形成流体回流区,使液滴在蒸发室中停留时间更长,从而提高蒸发效率。与其他因素相比,料液浓度对雾化和蒸发的影响较小。最后通过研究得到较好的工艺操作条件:雾化盘转速24000r/min,进料流量4.5kg/h,热风温度498K,热风流量80m3 /小时。

更新日期:2021-07-26
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