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Estimation of Collection Efficiency Depended on FeedParticle Concentration for Axial Flow Cyclone DustCollector 被引量:3
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作者 Akira Ogawa(Department of Mechanical Engineering, College of Engineering, Nihon University T-963-8642.Tokusada, Tamura-machi, Kooriyama-shi, Japan. Fax.0249-56-8860) 《Journal of Thermal Science》 SCIE EI CAS CSCD 1999年第3期143-157,共15页
A cyclone dust collector is applied in many industries. Especially the axial flow cyclone is the mostsimple construction and it keeps high reliability for maintenance. On the other hand, the collectionefficiency of th... A cyclone dust collector is applied in many industries. Especially the axial flow cyclone is the mostsimple construction and it keeps high reliability for maintenance. On the other hand, the collectionefficiency of the cyclone depends not only on the inlet gas velocity but also on the feed particle concentration. The collection efficiency increases with increasing feed particle concentration. However untilnow the problem of how to estimate the collection efficiency depended on the feed particle concentrationis remained except the investigation by Muschelknautz & Brunner~[6]. Therefore in this paper one ofthe estimate method for the collection efficiency of the axial flow cyclones is proposed. The applicationto the geometrically similar type of cyclone of the body diameters D_1=30, 50, 69 and 99 mm showedin good agreement with the experimental results of the collection efficiencies which were described indetail in the paper by Ogawa & Sugiyama~[8]. 展开更多
关键词 axial flow cyclone dust collector collection efficiency cut-size Reynoldsnumber centrifugal effect re-entrainment in dust bunker critical feed particle concentration FLY-ASH high concentration low concentration.
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Contributions of the Secondary Jet to the Tangential Velocity Distribution and to the Collection Efficiency of the Fixed Guide Vane Type Axial Flow Cyclone Dust Collector
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作者 Akira Ogawa Hideki Anzou +1 位作者 So Yamamoto Mituru Shimagaki 《Journal of Thermal Science》 SCIE EI CAS CSCD 2015年第6期503-509,共7页
In order to control the maximum tangential velocity V?m(m/s)of the turbulent rotational air flow and the collection efficiencyηc(%)using the fly ash of the mean diameter X R50=5.57?m,two secondary jet nozzles were in... In order to control the maximum tangential velocity V?m(m/s)of the turbulent rotational air flow and the collection efficiencyηc(%)using the fly ash of the mean diameter X R50=5.57?m,two secondary jet nozzles were installed to the body of the axial flow cyclone dust collector with the body diameter D1=99mm.Then in order to estimate V?m(m/s),the conservation theory of the angular momentum flux with Ogawa combined vortex model was applied.The comparisons of the estimated results of V?m(m/s)with the measured results by the cylindrical Pitot-tube were shown in good agreement.And also the estimated collection efficienciesηcth(%)basing upon the cut-size Xc(?m)which was calculated by using the estimated V?m(m/s)and also the particle size distribution R(Xp)were shown a little higher values than the experimental results due to the re-entrainment of the collected dust.The best method for adjustment ofηc(%)related to the contribution of the secondary jet flow is principally to apply the centrifugal effect?c(1).Above stated results are described in detail. 展开更多
关键词 Axial Flow Cyclone dust Collector Maximum Tangential Velocity Cut-Size Particle Size Distribution Collection Efficiency Reynolds number Centrifugal Effect
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