9MW余热发电机组循环水泵节能技术改造  

Energy Saving Technology Transformation of Circulating Water Pump for 9MW Waste Heat Power Generation Unit

作　　者：栗永刚 王亚维 刘晓飞 LI Yonggang;WANG Yawei;LIU Xiaofei(Tianrui Xindeng Zhengzhou Cement Co.,Ltd.,Zhengzhou Henan 452470,China)

机构地区：[1]天瑞新登郑州水泥有限公司,河南郑州452470

出　　处：《水泥技术》2025年第1期31-34,共4页Cement Technology

摘　　要：某5000t/d水泥熟料生产线配套9MW余热发电系统,使用两台4级(4个磁极)10kV高压电机驱动老式卧式双吸循环水泵,存在循环水泵转速较高、能效较低、耗电量大、机械密封易损坏、检维修成本较高等问题。通过评估循环水泵末端换热设备热工性能,分析冷却塔性能参数,应用“三元流动理论”采用CFD仿真模拟技术进行流场模拟分析,设计使用新型“3+1”高效流体节能循环水泵进行技术改造,配套更换6级(6个磁极)转速较低(980r/min)高压电机。技改后,单台循环水泵小时耗电量可降低约71kW/h,每年可节约电费约24万元,循环水泵及电机的机械密封和轴承更换频次较少,设备检维修成本大幅降低,节能效果和经济效益显著。A 5000t/d cement clinker production line is equipped with a 9MW waste heat power generation system,which uses two 4-stage(4 magnetic poles)10kV high-voltage motors to drive an old-fashioned horizontal double suction circulating water pump.There are problems including high circulating water pump speed,low energy efficiency,high power consumption,vulnerable mechanical seals,and high maintenance costs.By evaluating the thermal performance of the end heat exchange equipment of the circulating water pump,analyzing the performance parameters of the cooling tower,applying the"Three Element Flow Theory"and using CFD simulation technology for flow field simulation analysis,a new"3+1"high-efficiency fluid energy-saving circulating water pump is designed for technical transformation,and a 6-stage(6 magnetic poles)low speed(980r/min)highvoltage motor is replaced with a set.After the technological transformation,the hourly power consumption of a single circulating water pump can be reduced by about 71 kW/h,saving about 0.24 million yuan in electricity bills per year.The mechanical seals and bearings of the circulating water pump and motor are replaced less frequently,and the equipment maintenance costs are significantly reduced.The energy-saving effect and economic benefits are significant.

关 键 词：余热发电 循环水泵 三元流动理论 CFD仿真模拟 节能减排 

分 类 号：TQ172.625.9[化学工程—水泥工业]