供水系统瞬变流分析及运行调节安全研究

Research on Fluid Transient and Operation Scheduling Safety of Water Supply System

为解决供水系统在实际运行中由于需水量变化、事故停泵等原因引起的水锤问题,结合实际供水工程,基于特征线法建立水泵供水系统水力过渡过程模型,进行瞬变流复核及运行调节安全优化的相关研究。实际工程表明,在无水锤防护措施的情况下,事故停泵会引起管路当中出现过大的负压,通过布置低位调压塔的水锤防护措施,有效解决了负压问题,保证了供水系统工程的安全运行;通过降低水厂接入点的供水压力,在满足系统安全的情况下,增大了泵组供水量,提高了节能效益,实现了供水工程的经济运行。

In order to prevent the water hammer caused by the change of water demand and accidental pump stop in the actual operation of the water supply system,based on the actual water supply project and method of characteristics,this paper establishes the hydraulic transition process model of the pump water supply system,and studies the fluid transient review and the optimization of operation scheduling safety.The actual project shows that without water hammer protection measures,the excessive negative pressure will occur in the pipeline in case of accidental pump stop.By taking the water hammer protection measures on the surge tower at lower positions,the negative pressure is effectively avoided and the safe operation of water supply system is guaranteed.By reducing the water supply pressure at the access point of the water plant,while ensuring the system safety,the water supply of the pump set is increased,the energy saving benefits are improved,and the economic operation of water supply projects is realized.