旋流除砂器对高含砂地表水处理效果的仿真模拟

Numerical Simulation of Hydrocyclone Separation Efficiency in Treatment of High-sand Surface Water

针对长江重庆段水体在夏季细砂含量高、不易直接作为热泵水源的问题,设计了旋流除砂器,并应用数值模拟方法,就所设计的旋流除砂器的入口速度、入口砂粒浓度和密度对各粒径砂粒分离效率的影响进行研究,以期得出旋流除砂器的最佳操作参数。研究结果表明,随着入口速度、入口砂粒密度的增大,各粒径砂粒的分离效率均有不同程度的提高;而随着入口砂粒浓度的增加,小粒径砂粒的分离效率降低,较大粒径砂粒的分离效率先降低后逐渐增大。

In response to the high amounts of fine sands in the Chongqing section of the Yangtze River during summer, which compromises the water＇ s use as a source to heat pumps, a hydrocyclone was designed. The influence of hydrocyclone inlet velocity, sand concentration and density on separating sand of different sizes was investigated using numerical simulation to achieve the optimal operation parameters of the hydrocyelone. The results showed that the separation efficiency of sand was improved to varying degrees by increasing the sand velocity and density at the inlet. As the concentration of sand at the inlet increased, the separation efficiency of small sand particles declined. However, the separation efficiency of large sand particles initially declined and then gradually increased.