市政原水输送系统特大型泵站工艺设计

Process Design of Extra-large Scale Pumping Station in Municipal Raw Water Delivery System

以金泽输水泵站为案例,分析了市政原水输水系统中特大型泵站在工艺设计中需考虑的主要因素。金泽泵站规模为351×10~4m^3/d,设计针对原水输送系统投产初期流量仅为设计规模的60%的情况,结合水量、调度和用地要求,选用大流量高扬程立式混流泵,全部变频调节,多台水泵并联覆盖全部运行期间所需工况。泵站附属设施设计采用高标准,精准服务于水泵及电机要求、保全泵站运行稳定安全,并应用数值模拟分析、水力过渡过程分析、BIM设计等科学手段辅助优化设计,从设计源头考虑市政原水输送系统及受水净水厂需求、特点和安全运行的要求。运行两年来,泵站很好地适应了初期小流量工况,运行安全高效。

Taking the Jinze pumping station as a case,the main factors in the process design of extra-large scale pumping stations in the municipal raw water delivery system were introduced. The scale of Jinze pumping station was 3. 51 million m^3/d. Since the original flow rate was only 60% of the design scale,vertical mixed-flow pumps with large flow rate and high lift were selected based on the requirement of water quantity,dispatching and land use. All pumps could be frequency controlled,and multiple pumps were connected in parallel to cover all operating conditions required during operation. The pumping station’s ancillary facilities were designed with high standards,to make sure the operation of the pumping station safe and stable. Numerical simulation analysis,hydraulic transition process analysis,BIM were also used to assist and optimize the design. After two years of operation,the Jinze pumping station ran safely and efficiently,and could be well adapted to the original small flow conditions.