焦点提醒：一种污水中砂粒高效收集装配的设想与实验 摘要：污水处置系统中的砂粒含量太高会形成装备磨损等良多负面影响，而若何对污水中砂粒含量进行快速并有用的检测是当前的盲区。本研究设想了一种便宜持续流采样桶，其避免了单一取样时步调繁琐等错误谬误，采取持续采样方式来进行对样品液的年夜量搜集。对设想完成的采样桶模子进行CFD数值摹拟实验，以此来探讨其内部的流态和运转效力。实验成果注解，在进水流速为0.1m/s、进水砂粒的平均粒径为0.2mm的环境下，便宜持续流采样桶对砂粒的截留效力为94.1%。对设 一种污水中砂粒高效收集装配的设想与实验 摘要：污水处置系统中的砂粒含量太高会形成装备磨损等良多负面影响，而若何对污水中砂粒含量进行快速并有用的检测是当前的盲区。本研究设想了一种便宜持续流采样桶，其避免了单一取样时步调繁琐等错误谬误，采取持续采样方式来进行对样品液的年夜量搜集。对设想完成的采样桶模子进行CFD数值摹拟实验，以此来探讨其内部的流态和运转效力。实验成果注解，在进水流速为0.1m/s、进水砂粒的平均粒径为0.2mm的环境下，便宜持续流采样桶对砂粒的截留效力为94.1%。对设想的采样桶制造落后行现场实验，发觉其对砂粒的平均截留效力为96.8%。从数值摹拟和现场实验的两方面成果来看，该持续流采样桶设想公道靠得住，运转效力高，可用在现实出产。 要害词：CFD ;采样装配；砂粒收集；数值摹拟；持续采样 中图分类号：TU991 文献标识码：A 文章编号：1000-4602（XXXX）XX Design and testing of an efficient collection device for sand in sewage Abstract：In wastewater treatment systems，high grit levels can lead to negative effects such as equipment wear and tear, and there is a current blind spot in how to quickly and effectively detect grit levels in wastewater. In this study, a home-made continuous flow sampling bucket was designed, which avoids the disadvantages of tedious steps in single sampling and uses a continuous flow sampling method for the bulk collection of sample liquids.CFD numerical simulations were carried out on the designed sampling bucket model to investigate its internal flow regime and operational efficiency. The test results show that at an inlet flow rate of 0.1m/s and an average particle size of 0.2mm, the home-made continuous flow sampling bucket has a retention efficiency of 94.1%.The designed sampling bucket was manufactured and tested in the field and found to have an average retention efficiency of 96.8% for sand particles. The results from both the numerical simulation and the field test show that the continuous flow sampling bucket has a reasonable and reliable design and operates with high efficiency for practical production. Key words: CFD；sampling devices；grit collection;numerical simulation;continuous sampling 在污水处置系统中，砂粒会形成污水逗留时候减小、泵等装备的磨损[1]、污泥活性下降、残剩污泥的厌氧消化坚苦[2]等风险。除砂系统是砂粒去除的需要单位[3]，评估污水厂除砂系统运转效力的要害方案就是对样品中砂粒含量的有用检测，而这条件是实现对样品液的有用搜集。 为了包管所得数据成果的正确性和代表性，需要实施对样品液的年夜量搜集，搜集的体积凡是在0.5m3以上。能够把污水样品液的搜集方案分成两年夜类方式，即一次性取样方式和持续采样方式。一次性取样方式凡是借助水桶等容器间接从水体收集出，相对便利，但每次收集的体积较少，假如屡次收集则费时吃力，相干方式在林杰[4]、董志杰[5]等人的论文中有所表现。而持续采样方式以持续流采样桶为代表，该装配的运转道理是让污水同时流进和流出，在这个进程中操纵装配的布局特征实现对污水中砂粒的有用截留。这类方式的益处是遭到样品液总量的限制很小，只需截留下的砂粒不布满装配底部，理论上能够实现对污水长时候的持续收集。 本研究则是以旋流分手装备����APP为设想根本，操纵旋流分手的道理，设想出了一种便宜持续流采样装配。
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