卧式自清洗网式过滤器过滤及排污过程的数值模拟  

Numerical simulation of the filtration and sewage processes of horizontal self-cleaning mesh filter

作　　者：谢炎 刘贞姬[1] 李洁[1] 宗全利[1,2] 金瑾 石凯[1] XIE Yan;LIU Zhenji;LI Jie;ZONG Quanli;JIN Jin;SHI Kai(College of Water&Architectural Engineering,Shihezi University,Shihezi 832000,Xinjiang,China;College of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,Shandong,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]青岛农业大学资源与环境学院,山东青岛266109

出　　处：《浙江大学学报（农业与生命科学版）》2022年第1期117-124,共8页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国家自然科学基金(11662018)。

摘　　要：为了研究卧式自清洗网式过滤器在不同进水流速下过滤和排污过程中内部流场的分布规律,利用Fluent软件对卧式自清洗网式过滤器的过滤和排污过程进行清水流场的数值模拟,得到不同进水流速下的压强场和速度场,并将模拟结果与试验结果对比,二者相对误差在10%以内,证实了数值模拟的可靠性。数值模拟结果表明,进水流速越大,罐体和排污系统内的水流掺混越剧烈,可减少泥沙淤积,有助于提高过滤和排污效果,但随着进水流速的增大,罐体和排污系统的进出口压强差随之增大,其水头损失也增大,对过滤器结构稳定性要求也越高。上述研究结果可为卧式自清洗网式过滤器结构优化提供参考依据。In order to study the change rule of the internal flow field of the self-cleaning mesh filter with different inlet flow rates during the filtration and sewage processes,we used Fluent software to carry out the numerical simulation of the clear-water flow field for the filtration and sewage processes of the self-cleaning mesh filter,and obtained the pressure field and velocity field at the different inlet flow rates.Comparing the numerical simulation results with the physical test results,the relative error was within 10%,which confirmed the reliability of the numerical simulation.Meanwhile,the results of the numerical simulation showed that the higher the water flow rate was,the more violent the mixing of water was in the tank and the sewage system,which could reduce the sedimentation and help to improve the filtration and sewage effects.Moreover,with the increase of the inlet flow rate,the pressure difference between the inlet and outlet of the tank and the sewage system increased,and the head loss also increased,and the requirement for the stability of the filter structure was higher.The above research results can provide a reference for the optimization of the horizontal self-cleaning mesh filter structure.

关 键 词：自清洗网式过滤器 过滤过程 排污过程 数值模拟 水头损失 

分 类 号：S277.9[农业科学—农业水土工程]