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由于活性炭纤维(Activated carbon fiber,ACF)具有较发达的比表面积、较窄的空隙分布和较强的吸附性能。故本文通过沥青基活性炭纤维过滤器及过滤器加粉尘过滤器组成的净化装置在体积为53 m~3的实验间内对污染气体SO_2、NO_x及CO的净化效果进行了试验研究。研究结果表明:1)在一定时间内(20 min),沥青基活性炭纤维过滤器对SO_2和NO_x的去除效果在同一浓度不同风量下存在着最高去除率及相对应的最佳风量226 m~3/h。且整体试验装置在过滤风量为180~260 m~3/h范围内,对SO_2、NO_x去除效果最佳。2)装置在最佳风量下,对不同浓度SO_2、NO_x的去除都有随浓度升高而增加的趋势,但当浓度升到某一定值后,浓度再升高,效率却有所降低,其对SO_2、NO_x的去除存在最佳浓度范围。3)在试验浓度范围内,装置对SO_2的总去除率达86%以上,对NO_x的总去除率达80%以上,去掉自然衰减后的净去除率达71%和67%,且对低浓度的SO_2和NO_x也有较好的去除效果;但对CO几乎无吸附过滤作用。
Activated carbon fiber (ACF) has a relatively developed specific surface area, narrow gap distribution and strong adsorption performance. Therefore, the purifying effect of SO_2, NO_x and CO on the contaminated gas was studied in a 53m ~ 3 experiment room by using a pitch-based activated carbon fiber filter and a filter composed of a filter and a dust filter. The results show that: 1) the removal efficiency of SO_2 and NO_x by pitch-based activated carbon fiber filter has the highest removal rate and the best air volume of 226 m ~ 3 at the same concentration and different air volume within a certain time (20 min) / h. The overall test device in the filtered air volume of 180 ~ 260 m ~ 3 / h within the range of SO 2, NO_x removal of the best. 2) Under optimal air volume, the removal of SO 2 and NO x at different concentrations all increased with the increase of concentration, but when the concentration rose to a certain value, the concentration of SO 2 and NO x increased and the efficiency decreased, There is an optimum concentration range for the removal of SO 2 and NO x. 3) In the experimental concentration range, the total removal rate of SO_2 was more than 86%, the total NO_x removal rate was over 80%, the net removal rate after removing natural decay reached 71% and 67% SO_2 and NO_x also have a good removal effect; but almost no absorption and CO filtration.