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Water recovery efficiency improvement using the enhanced structure of the mist eliminator
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2021-08-26 , DOI: 10.1016/j.psep.2021.08.018
Zhikang Yu 1 , Cheng Sun 1 , Jiamei Fang 1, 2 , Lin Zhang 1, 2 , Yiyang Hu 1 , Bingguo Bao 1, 3 , Shi Bu 1 , Weigang Xu 1 , Yixiang Ji 1
Affiliation  

Thermal power plants are users of high water consumption, and the water consumption of cooling towers accounts for more than half of the total water consumption of the whole plant. Therefore, water saving of cooling towers is the key to water saving in thermal power plants. Wave-plate demister as a component of cooling tower influences the performance of entire system. Demister realizes the collection of liquid droplets with the penalty of extra pressure loss. Curved bends and drainage hooks are proposed as enhancing structures of demister to increase separation efficiency and reducing pressure loss simultaneously. Computational result shows that interaction between curved bend and hooks improves the overall performance of demister. Moreover, effect of enhancing parameters on the performance is presented, specifically, Euler number and separation efficiency are correlated as functions of curved bend radius and hook length. Most importantly, an experiment is conducted on a real cooling tower. It shows that the overall thermal capacity is lowered with the presence of demister. Pressure drop, separation efficiency and heat transfer of the entire system are tested with and without demisters, based on which a new criterion is proposed to evaluate the influence of demister on the overall performance of cooling tower in terms of thermal efficiency and droplets collection. Performance indexes as functions of enhancing parameters and droplets dynamic are plotted. Therefore, a quick design of demister can be realized in achieving an optimal performance of cooling tower.



中文翻译:

使用增强型除雾器结构提高水回收效率

火电厂是耗水量大的用户,冷却塔耗水量占全厂总耗水量的一半以上。因此,冷却塔节水是火电厂节水的关键。波板除沫器作为冷却塔的一个组成部分,影响着整个系统的性能。除雾器以额外的压力损失为代价实现液滴的收集。弯曲弯头和排水钩被提议作为增强除雾器结构以同时提高分离效率和减少压力损失。计算结果表明,弯头和钩子之间的相互作用提高了除雾器的整体性能。此外,还提出了增强参数对性能的影响,具体来说,欧拉数和分离效率作为弯曲弯曲半径和钩长度的函数相关。最重要的是,在真实的冷却塔上进行了实验。它表明整体热容量随着除雾器的存在而降低。测试了有无除雾器的整个系统的压降、分离效率和传热性能,在此基础上提出了一种新的标准,从热效率和水滴收集方面评估除雾器对冷却塔整体性能的影响。绘制了作为增强参数和液滴动态函数的性能指标。因此,可以实现除雾器的快速设计,以达到冷却塔的最佳性能。在真实的冷却塔上进行了实验。它表明整体热容量随着除雾器的存在而降低。测试了有无除雾器的整个系统的压降、分离效率和传热性能,在此基础上提出了一种新的标准,从热效率和水滴收集方面评估除雾器对冷却塔整体性能的影响。绘制了作为增强参数和液滴动态函数的性能指标。因此,可以实现除雾器的快速设计,以达到冷却塔的最佳性能。在真实的冷却塔上进行了实验。它表明整体热容量随着除雾器的存在而降低。测试了有无除雾器的整个系统的压降、分离效率和传热性能,在此基础上提出了一种新的标准,从热效率和水滴收集方面评估除雾器对冷却塔整体性能的影响。绘制了作为增强参数和液滴动态函数的性能指标。因此,可以实现除雾器的快速设计,以达到冷却塔的最佳性能。对有无除雾器的整个系统的分离效率和传热进行了测试,在此基础上提出了一个新的标准来评估除雾器对冷却塔整体热效率和液滴收集性能的影响。绘制了作为增强参数和液滴动态函数的性能指标。因此,可以实现除雾器的快速设计,以达到冷却塔的最佳性能。对有无除雾器的整个系统的分离效率和传热进行了测试,在此基础上提出了一个新的标准来评估除雾器对冷却塔整体热效率和液滴收集性能的影响。绘制了作为增强参数和液滴动态函数的性能指标。因此,可以实现除雾器的快速设计,以达到冷却塔的最佳性能。

更新日期:2021-09-09
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