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| Design and experiment of alkali pump with back open dual “S” impeller |
| Gong Enxiang1, Huang Mingke1, Zhang Li1, Liu Sanhua1, Yang Wei2 |
| (1.Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Hefei Hua sheng Pump and Valve Co. Ltd.,Hefei, Anhui 230031, China) |
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Abstract Aiming at the alkali pump works in a strong corrosion condition and low efficiency ,a design method with dual “S” impeller was proposed． By using the enlarged flow rate coefficient method，the effects of geometry parameters of the impeller on passing performance and efficiency were analyzed and the hydraulic design method was introduced．The results show that the dual “S” impeller is benefit for transporting viscous medium．Adopting nickel base alloy, its metallographic structure is austenite，named HS-1, assures the anti corrosion performance and reduces the cost of the pump. According to process engineering requirements，a single stage cantilever structure was used and the system’s stability was improved. The test result shows that the dual “S” impeller of alkali pump has a steady Q-H curve．In addition，the actual head is 52．3 m and the flow rate is 4 m3/h，the efficiency of the pump is 16.18%．All the technical parameters are satisfied for the design requirements and achieves localization of the alkali pumps．It is useful for the design of mini flow and low specific speed pump used in transporting high temperature, strong corrosion and viscous medium．
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Received: 26 October 2009
Published: 30 March 2010
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