基于旋流原理的固液分离设备及性能研究

发布时间：2018-02-26 13:06

本文关键词： 沉砂池旋流原理固液分离分离效率污水处理　出处：《农业现代化研究》2015年03期 　论文类型：期刊论文

【摘要】：根据水力相似原理,结合旋流沉砂池设计规律,建立了旋流固液分离设备模型,选择4个影响因素,采用单因素和正交试验,分析不同粒径的含砂水流时砂粒分离效率的变化,探讨沉砂分离效率主要影响因素及沉砂池设计最佳水平取值。结果表明,水头增大使分离效率增加,但过大的水头会使分离效率降低;流入口直径较小时分离效率较高;底流口直径增大使分离效率增加;底流管长度增大使分离效率增加。影响100目砂分离效率的各因素主次顺序及最佳水平为底流口直径30 mm、底流管长度45 cm、水头35 cm、流入口直径40 mm;影响30目砂分离效率的各因素主次顺序及最佳水平为水头60 cm,流入口直径40 mm,底流口直径30 mm,底流管长度30 cm。在各因素最佳水平下,100目砂的最佳分离效率为82.14%,30目砂的最佳分离效率为83.55%。试验结果为小型污水处理中的沉砂池设计与使用提供参考。
[Abstract]:According to the principle of hydraulic similarity and the design law of swirl sand settling tank, a model of cyclone solid-liquid separation equipment was established. Four influencing factors were selected, and single factor and orthogonal test were used to analyze the change of sand particle separation efficiency in sand flow with different particle sizes. The main influencing factors of sand settling separation efficiency and the optimum level of sand settling tank design are discussed. The results show that the separation efficiency increases with the increase of water head, but decreases with too large water head, and the separation efficiency is higher when the diameter of inlet is small. The separation efficiency increases with the increase of the diameter of the bottom outlet. The main and secondary factors affecting the separation efficiency of 100 mesh sand are as follows: bottom flow diameter 30 mm, bottom tube length 45 cm, water head 35 cm, inlet diameter 40 mm, and influence 30 mesh sand separation. The order and optimum level of each factor of efficiency are water head 60 cm, inlet diameter 40 mm, bottom outlet diameter 30 mm, bottom flow tube length 30 cm. The best separation efficiency of 100 mesh sand is 82.14 mm and 30 mesh sand under the optimum level of each factor. The test results provide reference for the design and use of sand settling tank in small sewage treatment.
【作者单位】：湖南农业大学工学院;
【基金】：国家自然科学基金(31272248) 国家国际科技合作项目(2013DFG91190) 和湖南省科技计划项目(2012NK3089)
【分类号】：X703.3

【参考文献】