Abstract: Geometric parameters of a desulphurization pump for thermal power plant such as impeller diameter, impeller outlet width, blade stagger angles, and pumping chamber were optimal designed based on the design method of two phase flow theory. The hydraulic performance and efficiency of the desulphurization pump had been improved by increasing the blade outlet width and chamber discharging diameter properly,and abrasion of the pump was reduced by decreasing the blade outlet angle. The three dimensional full flow field model was built based on Pro/E software, and the solid liquid two phase flow field of the desulphurization pump was calculated through CFD software Fluent 6.3 with Eulerian multiphase flow model. Abrasion mechanism of the two phase flow field was indicated. Wear of the flow passage components and the main wear parts were predicted according to numerical calculation and analysis of the solid volume concentration distribution in the desulphurization pump passage at design point. It can be concluded that main wear parts of the impeller are impeller inlet and outlet, pressure surface, front lines, and front shroud. A replaceable structure form of wear resisting lining board clearance self-compensation device in pumping chamber is designed, which ensures the pump to have higher efficiency and longer service life. Test of the pump performance show that the pump had reasonable structure, and the pump efficiency at design point is improved by 3.8%.
刘建瑞, 何小可, 刘亮亮, 李 昌, 向宏杰. 火电机组脱硫泵的设计及其磨损[J]. 排灌机械工程学报, 2011, 29(5): 374-378.
Liu Jianrui, He Xiaoke, Liu Liangliang, Li Chang, Xiang Hongjie. Design and abrasion of desulphurization pump for thermal power unit. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(5): 374-378.
[1] 杜 谦,马春元,董 勇,等.石灰石-石膏湿法烟气脱硫过程的实验研究[J].热能动力工程,2007,22(2):216-220.Du Qian,Ma Chunyuan,Dong Yong,et al.Experimental study of limestone/gypsumbased wet process flue gas desulphurization[J]. Journal of Engineering for Thermal Energy and Power,2007,22(2):216-220.(in Chinese)[2] Guleren K M, Pinarbasi A.Numerical simulation of the stalled flow within a vaned centrifugal pump[J]. Journal of Mechanical Engineering Science,2004,218(3):425-435.[3] Gandhi B K, Singh S N,Seshadri V.Effect of speed on the performance characteristics of a centrifugal slurry pump[J].Journal of Hydraulic Engineering, 2002,128(2):225-233.[4] 关醒凡.现代泵理论与设计[M].北京:中国宇航出版社,2011.[5] 闫国军.叶片式泵风机原理及设计[M].哈尔滨:哈尔滨工业大学出版社,2009.[6] 鲍崇高,高义民,邢建东.水轮机过流部件材料的冲蚀磨损腐蚀及其交互作用[J].西安交通大学学报,2010,44(11):66-70.Bao Chonggao,Gao Yimin,Xing Jiandong.Interaction between erosive wear and corrosion of alloy materials for hydro turbine in hydroelectric station [J]. Journal of Xi′an Jiaotong University,2010,44(11):66-70.(in Chinese)[7] Shuji Hattori, Morio Kishimoto.Prediction of cavitations erosion on stainless steel components in centrifugal pumps [J]. Wear,2008,256:1870-1874.[8] 刘建瑞,肖志杰,王鸿睿,等.基于CFD技术脱硫泵的设计与试验[J].排灌机械,2009,27(1):6-9.Liu Jianrui,Xiao Zhijie,Wang Hongrui,et al.Design and experiment of desulphurization pump based on CFD[J].Drainage and Irrigation Machinery,2009,27(1):6-9.(in Chinese)[9] 赵斌娟,袁寿其,刘厚林,等.基于Mixture多相流模型计算双流道泵全流道内固液两相湍流[J].农业工程学报,2008,24(1):7-12.Zhao Binjuan,Yuan Shouqi,Liu Houlin,et al.Simulation of solidliquid twophase turbulent flow in doublechannel pump based on mixture model[J].Transactions of the Chinese Society of Agricultural Engineering,2008,24(1): 7-12.(in Chinese)[10] 刘世光,梁双印.脱硫浆液泵内部流场的数值模拟及磨损特性分析[J].现代电力,2010,27(4):55-61.Liu Shiguang,Liang Shuangyin. Numerical simulation of internal flow field and abrasion analysis on desulphurization slurry pump[J].Modern Electric Power, 2010,27(4):55-61.(in Chinese)