气浮工艺中微纳米气泡应用特性与检测技术研究

doi:10.11894/iwt.2019-0253

摘要/Abstract

摘要：

总结了不同文献中气泡尺寸的定义，根据其特性进行分类。概述了气浮工艺中微纳米气泡的应用特性，介绍了微气泡粒径分布和表面电荷对气浮工艺的影响。围绕微纳米气泡的尺寸分布、上升速度、气含率、Zeta电位等特性参数，总结了微纳米气泡的各种表征检测技术，同时概述了微纳米气泡在气浮技术中的应用现状及前景，并对其发展应用进行展望。

关键词: 微纳米气泡, 气浮, 气液分离

Abstract:

The definitions of bubble size ranges in different kinds of literature are summarized and classified according to their characteristics. The application characteristics of micro-nano bubbles in the air-floating process are summarized, and the influence of micro-bubble particle size distribution and surface charge on the air-floating process is introduced. Based on the size distribution, rising speed, gas holdup, Zeta potential and other characteristic parameters of micro-nano bubbles, various characterization detection techniques of micro-nano bubbles are summarized. The application status, existing problems and prospects of micro-nano bubbles in air-floating technology are summarized, and the development and application of micro-nano bubbles in air-floating technology are prospected.

Key words: micro-nano bubble, air floatation, gas-liquid separation

中图分类号:

X703
TQ028

王永磊,刘威,田立平,亓华,杜振齐,周安然. 气浮工艺中微纳米气泡应用特性与检测技术研究[J]. 工业水处理, 2020, 40(4): 18-23.

Yonglei Wang,Wei Liu,Liping Tian,Hua Qi,Zhenqi Du,Anran Zhou. Research progress on micro-nano bubble characteristics detection method and its application in air floatation process[J]. Industrial Water Treatment, 2020, 40(4): 18-23.

https://www.iwt.cn/CN/Y2020/V40/I4/18

图/表 6

表1 不同尺寸范围气泡的性质对比

项目	宏观气泡	微米气泡	亚微米气泡	纳米/亚微米气泡
尺寸/μm	10⁴~10²	10²~10	10~1	1~10^-3
破裂位置	液体表面破裂	液体中破裂	液体中破裂	液体中膨胀并破裂
运动特点	搅动流快速上升（以秒计）并扩大	慢速上升（以分计）并收缩	慢速上升（以分-时计）并收缩	布朗运动（以时-天计）并收缩
传质效率	低	高	高	极高

图1 图像分析法装置及效果

图2 激光粒度仪法设备
1—溶气罐；2—激光粒度分析仪；3—光学分析槽；4—控制面板；5—空气进口；6—溶气水出口；7—烧杯

图3 原子力显微镜工作原理及获得的纳米气泡图像

图4 单个气泡上升速度随尺寸变化情况

图5 Zeta电位分析仪和微气泡Zeta电位测量系统

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