Design correlations of an air-lift tube reactor

Gas Separation & Purification Pub Date : 1995-06-01 DOI:10.1016/0950-4214(95)93947-I

J.G. Majeed, E. Békásy-Molnár

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引用次数: 4

Abstract

Air-lift reactors are important gas-liquid contactors for gas separation, purification, fermentation and waste water treatment on account of their simple construction and low energy consumption together with high mass and heat transfer rates. Apart from the improved liquid mixing, air-lift reactors have no moving elements and the power requirement comes only from the air supply.

A new air-lift tube (ALT)-type reactor was investigated in laboratory and pilot scale. A study was conducted to measure the effects of liquid properties (such as viscosity and density) on the hydrodynamics of the ALT reactor. The systems used for this study were: air/water, air/sodium hydroxide solution, air/sodium citrate buffer solution and air/glycerine. Pressure drop in the reaction tube, minimum and maximum gas velocities, pressure frequency and recycle liquid velocity in the recycle tube were measured under different experimental conditions using different tube diameters for the recycle and reaction tubes.

Design correlations for the above-mentioned parameters were developed by computer program in order to design an ALT reactor for gas-liquid reactions. The correlations are valid in the range 0.1–1400 m³ h⁻¹ of the gas stream.

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气升管式反应器的设计关系

气升式反应器具有结构简单、能耗低、传质传热率高等优点，是气体分离、净化、发酵、废水处理等领域重要的气液接触器。除了改进的液体混合外，气升式反应器没有运动元件，动力需求仅来自空气供应。对一种新型气升管反应器进行了实验室和中试研究。研究了液体性质(如粘度和密度)对ALT反应器流体动力学的影响。本研究使用的体系为:空气/水、空气/氢氧化钠溶液、空气/柠檬酸钠缓冲溶液和空气/甘油。采用不同的循环管和反应管管径，测量了不同实验条件下循环管内的压降、最小和最大气速、压力频率和循环管内的循环液速度。为了设计用于气液反应的ALT反应器，用计算机程序建立了上述参数的设计关联。在0.1-1400 m3 h−1的气流范围内，相关关系是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Gas Separation & Purification

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