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Bubbling tower reactor having damping internal construction member

A technology of internal components and reactors, applied in chemical methods, chemical instruments and methods, chemical/physical processes, etc. that make liquids react with gaseous media, can solve problems such as gas short circuits, difficult amplification, and poor gas-liquid contact

Inactive Publication Date: 2006-06-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may cause the gas to short-circuit from the center of the tower, causing poor gas-liquid contact and making it difficult to scale up
For some oxidation reactions, the short circuit of the gas will also cause an increase in the oxygen concentration of the tail gas, which will bring safety hazards
Most of the bubble column internals proposed in the current literature and used in industry are for the consideration of improving the gas-liquid mixing state, such as draft tubes, multi-layer partitions, stirring paddles, etc. Impediment internals to improve radial distribution of gas-liquid velocity reported

Method used

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  • Bubbling tower reactor having damping internal construction member
  • Bubbling tower reactor having damping internal construction member
  • Bubbling tower reactor having damping internal construction member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In the axial central area of ​​the bubble column reactor with a diameter of 500 mm and a height of 4000 mm, a damping member is fixed by a central vertical rod in the reaction area above the gas distributor and below the liquid level of the bubble tower. The damping member has 14 Such as figure 2 The radial damping unit shown has a diameter of 250mm, the distance between adjacent damping units is 200mm, the lowest damping unit is 200mm away from the gas distributor, and the uppermost damping unit is flush with the liquid level. The damping area density is 0.35m 2 / m 3 .

[0019] The experiment was carried out in an air-water system, the liquid level height after bubbling was 3000mm, and the superficial gas velocity was 0.62m / s. At the midpoint between the two damping units at a distance of 2250mm from the distributor, measure the axial velocity at different radial positions, and then compare the radial distribution of the fluid velocity without the damping inner mem...

Embodiment 2

[0022] The experimental conditions are the same as in Example 1, and the gas-liquid mass transfer rate is measured by chemical absorption method, and then the gas-liquid mass transfer coefficient k without damping internals and after installing damping internals is compared l α, the results are shown in Table 1.

[0023] The gas-liquid mass transfer coefficient of the empty tower reactor is 0.41. After adding the damping internal member described in Example 1, the mass transfer coefficient increases to 0.49, and the mass transfer rate increases by 20%. It shows that the disturbance of the damping internal member to the flow field strengthens the fluid turbulence and significantly increases the mass transfer rate.

[0024] Experimental conditions

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Abstract

A bubbling column reactor with internal damping member features that said internal damping member is coaxially installed in the reaction region above gas distributor for suppressing the flow speed in central region to make the radial speed distribution more uniform and interferring the flow field to promote local turbulence and increase gas-liquid mass transfer speed.

Description

technical field [0001] The invention relates to a gas-liquid bubble column reactor or a gas-liquid-solid three-phase bubble column reactor, especially a bubble column reactor with a damping inner member, which is used in various chemical production processes Phase reaction or gas absorption operation. Background technique [0002] Bubble column reactors are widely used in many fields such as chemical industry, energy, environment, biochemistry, etc., for mass transfer and reaction operations of gas-liquid two-phase or gas-liquid-solid three-phase, such as oxidation, hydrogenation, carbonylation, halogenation, fermentation , Absorption and other processes. Industrial bubble column reactors are becoming larger and larger. An important problem in the enlargement of the bubble column is the inhomogeneous distribution of the fluid axial velocity in the radial direction: in the central area of ​​the column, the gas-liquid two-phase flows upward, and the flow rate is relatively h...

Claims

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Application Information

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IPC IPC(8): B01J10/00
Inventor 李希陈斌王丽雅王丽军成有为
Owner ZHEJIANG UNIV
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