年間 6 号発行
ISSN 印刷: 2152-5102
ISSN オンライン: 2152-5110
Indexed in
Effect of Additive on the Performance Characteristics of Centrifugal and Progressive Cavity Slurry Pumps with High Concentration Fly Ash Slurries
要約
Slurry pumps are extensively used in the hydraulic transportation of fly ash slurries through pipes in thermal power plants. Today a wide range of slurry pumps are available and most commonly used pumps are broadly classified into two main categories namely positive displacement and centrifugal pumps. The two types of pumps differ considerably in construction as well as in operating principle compared to the conventional pumps. Presents study reports the effect of additive on the performance characteristics of centrifugal and progressive cavity screw pump for fly ash slurry at high concentration (above Cω ≈ 50 % by weight). Mixture of Sodium Carbonate and Henko detergent (5 : 1) at a concentration of 0.2 % by weight has been used as an additive. For each type of the pump, the effect of additive on the performance characteristics have been experimentally evaluated at rated speed with fly ash slurries in the concentration range of 50 to 70 % by weight. The pump total head, overall efficiency and pump input power as a function of the flow rate have been measured. The results obtained from the centrifugal slurry pump performance show that at rated speed, the performance of the pump improves with the addition of drag reducing additive. In the case of progressive cavity screw pump, pump performance characteristics and behavior were completely different compared to the centrifugal slurry pump. At rated speed, the performance of screw pump deteriorates with the addition of drag reducing soap solution.
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Singh Jatinder Pal, Kumar Satish, Mohapatra S.K., Head Loss Investigations Inside 90° Pipe Bend for Conveying Of Fine Coal–Water Slurry Suspension, International Journal of Coal Preparation and Utilization, 40, 11, 2020. Crossref