文献类型：期刊文献

中文题名：气泡尺寸对清洗固体表面油脂及颗粒污染物的影响

英文题名：Effect of bubble size on cleaning of oil and particles on solid surface

作者：张伯涵[1];许萧[1];杨强[1,2]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]华东理工大学,高浓度难降解有机废水处理技术国家工程实验室,上海200237

年份：2021

卷号：15

期号：1

起止页码：375

中文期刊名：环境工程学报

外文期刊名：Chinese Journal of Environmental Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：中国检验检疫科学研究院横向课题(2018JK020)。

语种：中文

中文关键词：气泡;气泡发生器;固体表面;罐底油泥清洗

外文关键词：bubble;bubble generator;solid surface;tank bottom oily sludge cleaning

摘要：为明确气泡清洗技术在罐底油泥清洗中的应用情况,考察了气泡尺寸差异对固体表面清洗效果的影响。搭建了玻璃表面油污气泡清洗可视化实验装置,并设计了气泡发生器。该发生器可通过调节气液比产生多种尺寸分布的气泡。实验中产生的气泡直径分布于80~1200μm。研究了气泡尺寸、清洗时间、距离和角度等参数对清洗效果的影响,结果表明,在液体流量为2.5 L·min^(-1)条件下,清洗去除率随气泡尺寸的增大而提高,气泡的平均直径为800μm时的清洗效果最好,能够将去除率从用水清洗的4.5%提高到68.3%,且当基底与水流方向为45°时的清洗去除率高于垂直或平行放置。上述结果说明,气泡撞击和破裂产生的水射流和涡流冲刷作用是主要的清洗机制。本研究结果可为高效处理油泥污染问题提供理论和实践参考,为罐底油泥清洗开拓新的解决路径。
In order to clarify the application of bubble cleaning technology in tank bottom sludge cleaning,the effect of bubble size on the cleaning performance of solid surfaces was investigated.A visualized experimental device for cleaning oil and particles on glass surfaces was set up.A bubble generator was designed to produce bubbles with an average diameter changing from 80 to 1200μm by adjusting the gas-liquid ratio.The effects of bubble size and cleaning parameters such as time,distance and angle on the cleaning effect were studied.The results showed that the removal efficiency increased with the increase of the bubble size at a liquid flow rate of2.5 L·min^(-1).The best cleaning effect occurred for the bubbles with average diameter of 800μm,which could improve the removal efficiency of 4.5%by water washing to 68.3%.Furthermore,the removal efficiency was higher when the angle between the substrate and the water flow was 45°than that placed horizontally and vertically.The above results showed that the scouring effect of water jet and vortex caused by the collosion and breakup of bubbles were the main cleaning mechanisms for the surfaces.The research results provide theoretical and practical references for the efficient treatment of oily sludge pollution,and open up a new solution path for tank bottom sludge cleaning.