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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
Author(s): 
Pages: 503-509
Year: Issue:  6
Journal: Journal of Thermal Science

Keyword:  Axial Flow Cyclone Dust CollectorMaximum Tangential VelocityCut-SizeParticle Size DistributionCollection EfficiencyReynolds numberCentrifugal Effect;
Abstract: In order to control the maximum tangential velocity V?m(m/s) of the turbulent rotational air flow and the collection efficiency ηc(%) 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 efficiencies ηcth(%) 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 of ηc(%) 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.
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