編輯說(shuō)：英文摘要還需進(jìn)一步修改完善，注意時(shí)態(tài)的統(tǒng)一性。

中文：以活性炭為過(guò)濾介質(zhì)，利用其多孔結(jié)構(gòu)脫除細(xì)顆粒，實(shí)現(xiàn)低壓降除塵工藝。研究活性炭顆粒粒徑、濾層厚度以及表觀過(guò)濾風(fēng)速等條件對(duì)多孔介質(zhì)過(guò)濾細(xì)顆粒效果的影響，并用表面光滑的不銹鋼珠進(jìn)行試驗(yàn)作對(duì)比，分析多孔介質(zhì)過(guò)濾細(xì)顆粒的機(jī)理。結(jié)果表明：活性炭顆粒對(duì)細(xì)顆粒的過(guò)濾效率明顯高于表面光滑的不銹鋼珠。過(guò)濾效率隨活性炭顆粒粒徑和表觀過(guò)濾風(fēng)速的減小而增加，當(dāng)粒徑從1.5 mm降至0.45 mm時(shí)，平均過(guò)濾率從53.17 %升至80.34 %，當(dāng)表觀風(fēng)速?gòu)?6.54 cm/s降到1.66 cm/s時(shí)，平均過(guò)濾率從41.89 %升至75.24 %。過(guò)濾效率隨濾層厚度的增加明顯增加，當(dāng)層厚從60 mm增加到140 mm時(shí)，過(guò)濾效率從47.62 %增大到70.78 %。不同試驗(yàn)條件下，過(guò)濾壓降都沒(méi)有隨時(shí)間有明顯變化，細(xì)顆粒沒(méi)有在活性炭顆粒表層形成粉塵層而增加壓降�；钚蕴款w粒床主要是依靠細(xì)顆粒擴(kuò)散、慣性碰撞和攔截效應(yīng)沉積在活性炭多孔結(jié)構(gòu)內(nèi)，從而脫除細(xì)顆粒。
英文：In order to remove dust in low pressure drop, activated carbon was used to adsorb fine particles as one of porous materials. The influence of experiment conditions such as granular size, thickness of filtration bed and superficial velocity on removal rate was studied. And the filtration mechanism of active carbon was also discussed through contrast test with smooth stainless steel beads. Results show that the filtration efficiency of activated carbon granular is significantly higher than that of the smooth stainless steel beads. The filtration efficiency increases with the size of activated carbon and the superficial velocity decrease. When the size of activated carbon granular decreased from 1.5 mm to 0.45 mm, the average filtration rate rose to 80.34 % from 53.17 %. When the superficial velocity decreased from 26.54 cm/s to 1.66 cm/s, the average filtration rate rose to 75.24 % from 41.89 %. The filtration efficiency significantly increases with increasing the filter medium. When the filter medium increased from 60 mm to 140 mm, the filtration efficiency increased from 47.62 % to 70.78 %. Under different test conditions, the fine particles do not form dust cake on the surface of the activated carbon granular to increase pressure drop, which lead to pressure drop changing non-significantly with time. Activated carbon granular bed remove fine particles with the aid of diffusion , inertial impaction and interception.

[ Last edited by 馬遜亞 on 2015-7-24 at 18:45 ] 返回小木蟲(chóng)查看更多