Ghorbani Shahna Farshid, Golmohamadi Rostam, Shahidi Reza
Department of Occupational Health Engineering, Faculty of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
J Res Health Sci. 2013 Sep 17;13(2):135-42.
In this study, an electroscrubber was designed and experimented for evaluation of integrating particle and droplet charging effects separately and jointly on collection efficiency of a spray tower and also to discover the optimal condition.
A homogenous concentration of relatively fine particles was introduced to influent air stream and electroscrubber efficiency in purifying them was determined through the measurement of input and output particles concentration. The effect of various conditions such as particles and droplets charging alone and together (bipolar) for several applied voltages has been studied.
In all of experiments, the applied charging voltage has a key role in promotion of electroscrubber efficiency. Maximum collection efficiency has achieved for 15 Kilovolt (Kv). The effectiveness of bipolar charging of particles and droplets with 15 Kv was higher than that of no-charging and singly charging. In other words, efficiency can be increased from 84.43% to 93.22 for total particles and from 50.8% to 75.16% for submicron particles. The maximum improvement of collection efficiency (42.2%) relates to bipolar charging of the initial size group with diameter smaller than 0.3 micrometer (µm) and the minimum (0.5%) to sizing group of 11 with diameter 4-5 µm.
This approach can be an appropriate option for the purpose of purifying submicron particles in spray tower scrubbers.
在本研究中，设计并试验了一种电洗涤器，以分别和联合评估颗粒和液滴充电效应对喷雾塔收集效率的影响，并找出最佳条件。
将均匀浓度的相对细颗粒引入进气流中，并通过测量输入和输出颗粒浓度来确定电洗涤器净化这些颗粒的效率。研究了多种条件的影响，如在几种施加电压下颗粒和液滴单独充电以及一起充电（双极）的情况。
在所有实验中，施加的充电电压对提高电洗涤器效率起着关键作用。在15千伏（kV）时实现了最大收集效率。15 kV下颗粒和液滴的双极充电效果高于不充电和单充电。换句话说，总颗粒的效率可从84.43%提高到93.22%，亚微米颗粒的效率可从50.8%提高到75.16%。收集效率的最大提高（42.2%）与初始尺寸组直径小于0.3微米（µm）的双极充电有关，最小提高（0.5%）与直径4 - 5 µm的11号尺寸组有关。
这种方法对于净化喷雾塔洗涤器中的亚微米颗粒可能是一种合适的选择。
