曝气沉砂池除砂机理分析

周文忠; 叶勇

环境工程学报

曝气沉砂池除砂机理分析

周文忠, 叶勇. 曝气沉砂池除砂机理分析[J]. 环境工程学报, 2013, 7(11): 4251-4254.

引用本文:

周文忠, 叶勇. 曝气沉砂池除砂机理分析[J]. 环境工程学报, 2013, 7(11): 4251-4254.

Zhou Wenzhong, Ye Yong. Analysis of grit removal mechanism of aerated grit chamber[J]. Chinese Journal of Environmental Engineering, 2013, 7(11): 4251-4254.

Citation:

Zhou Wenzhong, Ye Yong. Analysis of grit removal mechanism of aerated grit chamber[J]. Chinese Journal of Environmental Engineering, 2013, 7(11): 4251-4254.

曝气沉砂池除砂机理分析

周文忠¹,
叶勇¹

1.
安徽国祯环保节能科技股份有限公司, 合肥 230088
基金项目:
国家"863"高技术研究发展计划项目(2009AA063801)
中图分类号: X703.1

Analysis of grit removal mechanism of aerated grit chamber

Zhou Wenzhong¹,
Ye Yong¹

1.
Anhui Guozhen Environmental Protection Sci. & Tech. Co. Ltd., Hefei 230088, China
Fund Project:

摘要: 针对曝气沉砂池小试装置模型,通过配砂实验对沉砂池除砂率进行统计分析,研究曝气强度与HRT对沉砂池除砂率的影响。实验结果表明,不同曝气强度下,随着HRT变化,除砂率逐渐上升,并最终趋于平衡状态;不同HRT下,曝气强度与除砂率近似呈现一定的线性关系,且随着曝气强度的增大,除砂率降低;在HRT小于1 min时,砂粒的运行路径和沉降时间缩短,不利于砂粒的去除;在HRT大于1 min时,其中1、3和4 min,随着气水比的增加除砂率降低幅度相对较小,曝气所引起的横向环流在一定程度上有利于砂粒的沉降,而HRT为2 min时,除砂率降幅却很大,这与砂粒在曝气沉砂池池体断面分布有关,即断面处旋转流速和水平流速的大小变化将影响砂粒的运动;相比曝气强度,HRT对除砂率的影响较大。
- 曝气沉砂池小试模型 /
- 配砂实验 /
- 气水比 /
- 曝气强度 /
- HRT /
- 除砂率
Abstract: In this research, the influences of aeration intensity and HRT (hydraulic retention time) on the removal rate of grit chamberere were studied. We conducted experiments on a pilot scale aeration grit chamber model by sand mixing method, and analyzed data using statistic methods. The results show that under various aeration intensity conditions, the grit removal rate always increases with the increase of HRT, until it comes to an equilibrium; under different HRT, aeration intensity and grit removal rate have an approximate linearity, and the grit removal rate decreases with the increase of aeration intensity. When HRT is less than 1 min, the path and settling time of sand is too short to remove the grit. When HRT is more than 1 min, the cases are different: when HRTs are 1 min, 3 min or 4 min, the grit removal rate descends moderately with the increase of gas-water ratio, which is because the transverse circulation caused by aeration is somehow contributive to sand settlement to a certain extent. But when HRT is 2 min, the grit removal rate descends rapidly with the increase of gas-water ratio, which can be explained by sand distribution on basin section, i.e. the change of rotating velocity and horizontal velocity on the section can affect the motion of the grit. HRT has a greater influence on grit removal rate than aeration intensity.
- pilot scale aeration grit chamber model /
- sand mixing method /
- gas-water ratio /
- aeration intensity /
- HRT /
- grit removal rate

[1]	Arthur C.Lind,William J.Katz,Fox Point,Wis. Aerated grit chamber:United States,88105607.3.1989.7
[2]	Joel C.Rife,Lucas Botero.Last of the manual of practice No.8 section on grit removal. 86th Annual Water Environment Federation Technical Exhibition and Conference, Chicago USA,2012.581-587
[3]	Liliana Morales,Debra Reinhart.Full-Scale evaluation of aerated grit chambers.Water Pollution Control Federation, 1984, 56(4):337-343
[4]	Jerzy M.Sawicki.Aerated grit chambershydraulic design equation.Journal of Environmental Engineering, 2004, 130(9):1050-1058
[5]	Alex Munoz,Stephanie Young. Two-dimensional model for predicting performance of aerated grit chambers.Canadian Journal of Civil Engineering, 2009, 36(9):1567-1578
[6]	张西林,刘如玲,华风山,等.曝气沉砂池浮渣收集系统的技术改造.中国给水排水,2005,21(1):70-71 Zhang Xilin,Liu Ruling,Hua Fengshan,et,al.Technical renovation of scum collection system in aerated grit chamber.China Water & Wastewater,2005,21(1):70-71(in Chinese)
[7]	马强,尹君贤,张立文,等.曝气沉砂池的设计改进.工业用水与废水,2005,36(3):60-61
[8]	黄志华,王长平,张金松,等.曝气沉砂池除油刮渣系统的技术改造.中国给水排水,2009,25(12):50-52 Huang Zhihua,Wang Changping, Zhang Jinsong,et al. Technical renovationof oil and scum removal system in aerated grit chamber. China Water & Wastewater,2009,25(12):50-52(in Chinese)
[9]	武鹏崑,于澎学,安洪金,等.污水处理厂曝气沉砂池浮渣处理系统改造.中国给水排水,2006,22(16):23-24 Wu Pengkun,Yu Pengxue,An Hongjin,et al.Renovation of scum treatment systemin aerated grit chamber of wastewater treatment plant.China Water & Wastewater,2006,22(16):23-24 (in Chinese)
[10]	陈政,韩朝光,林静.曝气沉砂池的运行管理与技术改造.中国给水排水,2002,19(8):100-102
[11]	王宝良,王利,胡小珊,等.曝气沉砂池提砂系统故障分析及解决办法.中国给水排水,2009,25(12):96-97 Wang Baoliang,Wang Li,Hu Xiaoshan,et al.Failure analysis and solution of grit suction of aerated grit chamber.China Water & Wastewater,2009,25(12):96-97 (in Chinese)
[12]	高明泉,赵润兴.用气提法取代曝气沉砂池吸砂泵的工程改造.给水排水,2006,32(9):84-85
[13]	Kaibara K. Precipitator used for sedimentation of suspended solids wastewater,has rotary blade provided between deposition region of suspended solid, and natural-water introducing portion,and produces rotational flow of natural water. JP2009082959-A,2007.9
[14]	Jeff Sober,Steve Kramer,Jeff Ray,et al.A side by comparison of grit removal technologies:Mechanically induced vortex vs.stacked tray.86th Annual Water Environment Federation Technical Exhibition and Conference,Chicago USA,2012.576-580
[15]	Moss Kelley,Inc.,Grit characterization in Florida wastewater plants,2006.1-7
[16]	McNamara,Kochaba,T.,B.F,Griffiths,J.,Book,D.A pilot evaluation comparing two grit removal technologies.Proceedings of the 2009 Conference and Exhibition of the Water Environment Federation,2009.784-793
[17]	唐建国,林洁梅.曝气沉砂池的设计计算.给水排水,1997,23(10):15-17

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周文忠, 叶勇. 曝气沉砂池除砂机理分析[J]. 环境工程学报, 2013, 7(11): 4251-4254.

引用本文:

周文忠, 叶勇. 曝气沉砂池除砂机理分析[J]. 环境工程学报, 2013, 7(11): 4251-4254.

Zhou Wenzhong, Ye Yong. Analysis of grit removal mechanism of aerated grit chamber[J]. Chinese Journal of Environmental Engineering, 2013, 7(11): 4251-4254.

Citation:

Zhou Wenzhong, Ye Yong. Analysis of grit removal mechanism of aerated grit chamber[J]. Chinese Journal of Environmental Engineering, 2013, 7(11): 4251-4254.

曝气沉砂池除砂机理分析

周文忠¹,
叶勇¹

1. 安徽国祯环保节能科技股份有限公司, 合肥 230088

收稿日期: 2013-07-18

基金项目:

国家"863"高技术研究发展计划项目(2009AA063801)

关键词:

摘要: 针对曝气沉砂池小试装置模型,通过配砂实验对沉砂池除砂率进行统计分析,研究曝气强度与HRT对沉砂池除砂率的影响。实验结果表明,不同曝气强度下,随着HRT变化,除砂率逐渐上升,并最终趋于平衡状态;不同HRT下,曝气强度与除砂率近似呈现一定的线性关系,且随着曝气强度的增大,除砂率降低;在HRT小于1 min时,砂粒的运行路径和沉降时间缩短,不利于砂粒的去除;在HRT大于1 min时,其中1、3和4 min,随着气水比的增加除砂率降低幅度相对较小,曝气所引起的横向环流在一定程度上有利于砂粒的沉降,而HRT为2 min时,除砂率降幅却很大,这与砂粒在曝气沉砂池池体断面分布有关,即断面处旋转流速和水平流速的大小变化将影响砂粒的运动;相比曝气强度,HRT对除砂率的影响较大。

English Abstract

Analysis of grit removal mechanism of aerated grit chamber

Zhou Wenzhong¹,
Ye Yong¹

1. Anhui Guozhen Environmental Protection Sci. & Tech. Co. Ltd., Hefei 230088, China

Received Date: 2013-07-18

Fund Project:

Keywords:

pilot scale aeration grit chamber model /
sand mixing method /
gas-water ratio /
aeration intensity /
HRT /
grit removal rate

Abstract: In this research, the influences of aeration intensity and HRT (hydraulic retention time) on the removal rate of grit chamberere were studied. We conducted experiments on a pilot scale aeration grit chamber model by sand mixing method, and analyzed data using statistic methods. The results show that under various aeration intensity conditions, the grit removal rate always increases with the increase of HRT, until it comes to an equilibrium; under different HRT, aeration intensity and grit removal rate have an approximate linearity, and the grit removal rate decreases with the increase of aeration intensity. When HRT is less than 1 min, the path and settling time of sand is too short to remove the grit. When HRT is more than 1 min, the cases are different: when HRTs are 1 min, 3 min or 4 min, the grit removal rate descends moderately with the increase of gas-water ratio, which is because the transverse circulation caused by aeration is somehow contributive to sand settlement to a certain extent. But when HRT is 2 min, the grit removal rate descends rapidly with the increase of gas-water ratio, which can be explained by sand distribution on basin section, i.e. the change of rotating velocity and horizontal velocity on the section can affect the motion of the grit. HRT has a greater influence on grit removal rate than aeration intensity.

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曝气沉砂池除砂机理分析

Analysis of grit removal mechanism of aerated grit chamber

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曝气沉砂池除砂机理分析

English Abstract

Analysis of grit removal mechanism of aerated grit chamber

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