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Display experiment method and device for coupling internal flow of bubbles and external mass transfer of bubbles

An experimental method and internal flow technology, applied in the field of chemical separation and mass transfer, can solve problems such as lack of research methods and devices, and achieve the effects of increasing clarity, enhancing display clarity, and enhancing continuity

Active Publication Date: 2021-08-10
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to solve the problem that the current research on the internal flow of bubbles and mass transfer outside bubbles lacks suitable research methods and devices. With the help of image capture processing technology, the internal flow phenomenon of rising bubbles and the mass transfer behavior outside bubbles can be captured at the same time, so as to go deeper. Analyze the phenomenon of fluid flow and mass transfer accurately, and then develop a display experimental device that couples the internal flow of the bubble and the mass transfer outside the bubble

Method used

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  • Display experiment method and device for coupling internal flow of bubbles and external mass transfer of bubbles

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Embodiment 1

[0033] The invention relates to a display experiment method and device for coupling the inner flow of bubbles and the mass transfer outside the bubbles, which are used for the measurement experiment of the motion parameters of the bubbles in a laboratory.

[0034] 1. preparation concentration is the resazurin solution of 0.12g / L, the sodium hydroxide solution of 0.5g / L and the glucose solution of 15g / L, turn on the power, turn on the image processing system (S12) and the laser generator (S5), and Connect the high-speed camera (S11) to complete the connection of the PIV device.

[0035] ②Turn on the air pump (P1), and after a period of time, open the air valve (V3), the valve is in a fully open state, allowing air to flow into the bubble observation chamber (S8).

[0036] ③After ventilation for a period of time, slowly add 0.12g / L resazurin solution, 0.5g / L sodium hydroxide solution and 15g / L glucose solution to the bubble observation chamber (S8) to the liquid level 12cm, obs...

Embodiment 2

[0042] The invention relates to a display experiment method and device for coupling the internal flow of bubbles and the mass transfer outside the bubbles, which are used to simulate the movement of bubbles in a bubble tower.

[0043] 1. preparation concentration is the resazurin solution of 0.8g / L, the sodium hydroxide solution of 1.2g / L and the glucose solution of 25g / L, turn on the power, turn on the image processing system (S12) and the laser generator (S5), and Connect the high-speed camera (S11) to complete the connection of the PIV device.

[0044] ②Turn on the air pump (P1), and after a period of time, open the air valve (V3), the valve is in a fully open state, allowing air to flow into the bubble observation chamber (S8).

[0045] ③After ventilating for a period of time, slowly add resazurin solution with a concentration of 0.8g / L, sodium hydroxide solution of 1.2g / L and glucose solution of 25g / L to the bubble observation chamber (S8) to the liquid. The bit height i...

Embodiment 3

[0051] The invention relates to a display experiment method and device for coupling the internal flow of bubbles and the mass transfer outside the bubbles, which are used to simulate the movement of bubbles on a large-diameter rectification tray.

[0052] 1. preparation concentration is the resazurin solution of 1.2g / L, the sodium hydroxide solution of 2.0g / L and the glucose solution of 45g / L, turn on the power supply, turn on the image processing system (S12) and the laser generator (S5), and Connect the high-speed camera (S11) to complete the connection of the PIV device.

[0053] ② Turn on the air pump (P1), and after a period of time, open the air valve (V3). The valve is fully open at the beginning, so that air can flow into the bubble observation chamber (S8).

[0054] ③After ventilating for a period of time, slowly add resazurin solution with a concentration of 1.2g / L, sodium hydroxide solution of 2.0g / L and glucose solution of 45g / L to the bubble observation chamber (S...

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Abstract

The invention relates to a display experiment method and device for coupling bubble internal flow and bubble external mass transfer. The method comprises the following steps of adding a prepared resazurin solution with a certain concentration, a sodium hydroxide solution and a glucose solution to a certain liquid level in a bubble observation chamber by utilizing a resazurin chromogenic reaction and taking smoke as tracer particles, introducing a mixed gas of oxygen and smoke, and by virtue of a high-speed camera and an image processing system, meanwhile, the phenomena of fluid flowing inside the bubbles and liquid phase mass transfer outside the bubbles being displayed. The method is advantaged in that an internal flow phenomenon of the captured bubbles is obvious, and the mass transfer wake outside the bubbles is clear.

Description

【Technical field】 [0001] The invention belongs to the field of chemical separation and mass transfer, and in particular relates to a display experiment method and device for coupling the internal flow of bubbles and the mass transfer outside the bubbles. 【Background technique】 [0002] Rectification is widely used in the separation of liquid mixtures. It has the advantages of large processing capacity and strong applicability. However, due to insufficient contact between the gas and liquid phases on the rectification tray, its separation efficiency is low. For high-purity separation of near-boiling point mixtures or azeotropic mixtures, low separation efficiency will lead to serious energy consumption and other problems. The main form of gas-liquid coexistence on the rectification tray is bubbles, and the transfer process of volatile components in the mixture from the gas phase to the liquid phase is mainly affected by the interface, liquid side and gas side mass transfer. ...

Claims

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Application Information

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IPC IPC(8): G01N13/00G01N21/84
CPCG01N13/00G01N21/84G01N2021/8405
Inventor 李鑫祁华清李晨孟凡庆齐建光王英龙
Owner QINGDAO UNIV OF SCI & TECH
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