Pitched Blade Turbine Efficiency at Particle Suspension

Acta Polytechnica

D. Ceres¹  T. Jirout¹  F. Rieger¹ 

关键词: Pitched blade turbine;    particle suspension;    agitator efficiency;   

DOI  :  

来源: Czech Technical University in Prague, Faculty of M

【 摘 要 】

Mixing suspensions is a very important hydraulic operation. The pitched six-blade turbine is a widely-used axial-flow impeller. This paper deals with effect relative impeller size and particle content on theefficiency of a pitched six-blade turbine at particle suspension. Two pitched six-blade turbines were used in model measurements of just suspension impeller speed. The ratios of the vessel to agitator diameterD/dwere 3 and 4.5. The measurements were carried out in a dish-bottomed vessel 300 mm in diameter. The just suspension impeller speeds were measured using an electrochemical method, and were checked visually. A 2.5 % NaCl water solution was used as the liquid phase, and glass particles with four equivalent diameters between 0.18 and 0.89 mmand volumetric concentration from 2.5 % to 40% were usedasthesolid phase. The criterion valuesπ s =P o √Fr' 3 (d/D) 7 were calculated from the particle suspension and power consumption measurements. The dependencies ofπ s on particle contentc v show that larger agitators are more efficient for higher particle content.

【 授权许可】

Unknown