Method and device used for regulating and controlling large and small bubble fractal structures to enhance mass transfer

A technology of fractal structure and large bubbles, which is applied in chemical methods, chemical instruments and methods for reacting liquid and gaseous media, and the reaction of liquids and gases under foam/aerosol/bubbles, etc., which can solve obstacles to reactor optimization and the progress of development, the inability to give further details of the bubbles, and the inability to effectively count and analyze the bubble shape of the gas-liquid reactor

Pending Publication Date: 2019-11-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of the description of the bubble position distribution, the gas fraction at a certain position is usually used to describe it, and the detailed information of the bubbles in the unit volume cannot be

Method used

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  • Method and device used for regulating and controlling large and small bubble fractal structures to enhance mass transfer
  • Method and device used for regulating and controlling large and small bubble fractal structures to enhance mass transfer
  • Method and device used for regulating and controlling large and small bubble fractal structures to enhance mass transfer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] Example 1

[0046] In a reactor with a diameter of 180 mm and a height of 2.2 meters, the oxygen mass transfer experiment was carried out, and the traditional bubbling reactor and the fractal bubble reactor were used for comparative analysis, such as: figure 1 As shown, all are gas-liquid upflow flow state, the apparent gas velocity is 0.025m / s, the apparent liquid velocity is 0.0077m / s, the experimental temperature is 15 degrees Celsius, the dynamic oxygen concentration method is used to measure KLa, the bulk mass transfer coefficient like figure 2 shown. When the method and device are used to dissolve oxygen in water, the mass transfer coefficient is increased from 0.015 to 0.027.

Example Embodiment

[0047] Example 2

[0048] In a reactor with a diameter of 280 mm and a height of 6 meters, the oxygen mass transfer experiment was carried out, and the traditional bubbling reactor and the fractal bubble reactor were used for comparative analysis. All are in the gas-liquid upflow state, the apparent gas velocity is 0.005-0.025m / s, the apparent liquid velocity is 0.0077m / s, and the experimental temperature is 15 degrees Celsius. The dynamic oxygen concentration method is used to measure KLa. The mass transfer coefficient is as follows: figure 2 shown. When the method and device are used to dissolve oxygen in water, the mass transfer coefficient of the traditional bubbling reactor is 0.0025-0.013, and the mass transfer coefficient of the reactor F with a reasonable fractal dimension is 0.013-0.026. Under the working condition of 0.025m / s, the bulk mass transfer coefficient is increased to twice that of the bubbling reactor.

[0049] like image 3 Schematic diagram of the dis...

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Abstract

The invention discloses a method and a device used for regulating and controlling large and small bubble fractal structures to enhance mass transfer. According to the method, bubble size fractal dimension in a bubble reactor is adopted for precision description of bubble size distribution, a fractal bubble generation method is adopted for precision control of bubble fractal dimension in the bubblereactor, and improve the mass transfer reaction performance of the bubble reactor. The invention relates to fractal structure distribution of large bubble generation, small bubble generation, and bubble groups in the space; a part of gas is introduced into throttling channels to form large bubbles, the other part of gas is introduced into shearing channels to form small bubbles, the two kinds ofbubbles are generated on separating plates at the same height in the reactor; bubble groups are delivered through a dispersion member, and fractal structure characteristics are formed on the cross section and vertical section of the reactor. Generation of the two kinds of bubbles and bubble dispersion are adopted to control bubble group fractal structure distribution in the reactor, and gas liquidmass transfer is enhanced.

Description

technical field [0001] A method and device for enhancing mass transfer by adjusting and controlling the fractal structure of large and small bubbles, specifically relating to a gas-liquid reactor with a fractal structure of bubbles, and relating to the generation method and control mode of fractal bubbles to achieve the goal of enhancing mass transfer, which can be used in petroleum Refining, pharmaceutical industry, fine chemical industry, coal chemical industry, electric power, aviation, environment and other fields. Background technique [0002] The bubble morphology in the gas-liquid reactor dominates the gas-liquid mass transfer and reaction performance, and the parameters describing the bubble morphology usually include the bubble size distribution and the bubble location distribution. [0003] Based on the regulation of the bubble shape, the mass transfer performance of the bubble reactor is enhanced. It has become a consensus that by reducing the size of the bubbles...

Claims

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Application Information

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IPC IPC(8): B01J10/00
CPCB01J10/002
Inventor 许萧杨强刘懿谦张博涵代品一卢浩
Owner EAST CHINA UNIV OF SCI & TECH
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