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Micro-bubble dimension online measurement apparatus and method thereof

A measuring device and micro-bubble technology, which are applied to the device for online measurement of micro-bubble size distribution in gas-liquid multiphase flow, and the measurement field of micro-bubble size in dissolved air flotation tank, can solve the problem of difficult to achieve accurate online measurement and the like. The effect of improving measurement accuracy, ensuring accuracy, and improving analysis speed

Inactive Publication Date: 2015-05-06
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main problems in these two methods for microbubble measurement: one is that the bubble chord length distribution can only be directly obtained through measurement, and then the effective diameter of the bubble needs to be obtained after assumptions and transformations; the other is that the probe or probe Due to the limitation of its own size and the limitation of the linear motion of the bubble to be measured during the measurement process, it is only suitable for measuring bubbles with a diameter greater than 1mm
[0005] In summary, the current measurement methods for microbubbles have certain limitations, and it is difficult to achieve accurate online measurement

Method used

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  • Micro-bubble dimension online measurement apparatus and method thereof
  • Micro-bubble dimension online measurement apparatus and method thereof
  • Micro-bubble dimension online measurement apparatus and method thereof

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Experimental program
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Embodiment 1

[0030] Such as figure 1 , The microbubble size online measurement device of the present invention includes a CCD camera (4), a microscope lens (5), a microbubble sampling device (13), an LED light source (6), a homogenizing plate (12), a microcomputer (10) and an image Processing software.

[0031] The microbubble sampling device (13) includes a sampling tube (1), a tee (2), an observation chamber (3), a surfactant tank (7), a peristaltic pump (8), a peristaltic pump (11), and a ball valve (9) And silicone tube.

[0032] The sampling tube (1), CCD camera (4), LED light source (6), surfactant tank (7), peristaltic pump (8), and peristaltic pump (11) are all installed on the support platform;

[0033] The sampling tube (1) is made of plexiglass with an inner diameter of 10mm. One end is used for sampling, the other end is connected to a tee, and the other ends of the tee are respectively connected to the observation chamber (3) and the surfactant tank (7). );

[0034] The observation ...

Embodiment 2

[0048] Such as figure 1 , The microbubble size online measurement device of the present invention includes a CMOS camera (4), a microscope lens (5), a microbubble sampling device (13), an LED light source (6), a homogenizing plate (12), a microcomputer (10) and an image Processing software.

[0049] The microbubble sampling device (13) includes a sampling tube (1), a tee (2), an observation chamber (3), a surfactant tank (7), a peristaltic pump (8), a ball valve (9) and a silicone tube .

[0050] The sampling tube (1), CMOS camera (4), LED light source (6), surfactant trough (7) and peristaltic pump (8) are all installed on the support platform;

[0051] The sampling tube (1) is made of plexiglass with an inner diameter of 10mm. One end is used for sampling, the other end is connected to a tee, and the other ends of the tee are respectively connected to the observation chamber (3) and the surfactant tank (7). );

[0052] The observation chamber (3) is a sealed rectangular parallelep...

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Abstract

The invention provides a micro-bubble dimension online measurement apparatus and a method thereof. The apparatus and the method are used for online measurement of dimensions of micro-bubbles in multiphase flow. The measurement apparatus comprises a camera, a micro-lens, a micro-bubble sampling device, a light source system, a microcomputer and analysis software. The micro-bubble measurement apparatus adopts an inclined observation surface and uses a surfactant solution, so the imaging quality of micro-bubble images is improved; and threshold segmentation and a shape factor are combined to guarantee the rapid processing of the micro-bubble images, so the apparatus and the method have the advantages of high accuracy and real time.

Description

Technical field [0001] The invention relates to an on-line measurement device and method for the size of microbubbles, in particular to a device and an implementation method for online measurement of the size distribution of microbubbles in a gas-liquid (solid) multiphase flow, and can be applied to the measurement of the size of the microbubbles in a dissolved air flotation tank . Background technique [0002] The characterization of bubble size (effective diameter) and its distribution is of great significance to the mass transfer of chemical processes. For example, for the air flotation process, the size of the bubble not only affects the collision or contact probability of the bubble with the particle, but also affects the rising speed of the bubble. At present, the literature reports that bubble measurement methods mainly include: conductivity method, optical fiber method, light scattering method, capillary method and image method. [0003] The measurement principles of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
CPCB03D1/028
Inventor 张文晖杨冰张盆
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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