旋流气升式反应器中醇水溶液的气含率与循环液速研究  

Study on average gas holdup in riser and liquid velocities in downcommer in the helical-flow air-lift ioop reactor for alcoholic aqueous solutions

作　　者：邱爽 高美伊 郭秋丽[1] 戴咏川[1] 刘永民[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001

出　　处：《化学工程师》2017年第10期60-63,40,共5页Chemical Engineer

基　　金：辽宁省自然科学基金资助项目(972050);中海油炼化公司资助项目(HL00FW(P)2014-0005)

摘　　要：在内径0.090m总高2.4m的旋流气升式环流反应器中,以空气作气相,分别以水、1%(v)正丁醇水溶液和异丙醇水溶液(浓度(v)为1%、5%、10%)为液相,在上升区表观气速为0.46~2.53cm·s^(-1)范围内,研究了底部间隙、翅片数量、异丙醇水溶液和正丁醇水溶液物系对上升区气含率和下降区液体速度随上升区表观气速的变化规律。结果表明:上升区气含率随底部间隙的减小而增加,液体循环速度则减小;翅片数越少,循环液速越高,3翅片的下降区液体速度比4翅片的平均高约28.3%;气含率在低气速时3翅片的大于4翅片的,高气速时4翅片的大于3翅片的;醇的浓度增加,气含率增加;1%异丙醇水溶液物系的气含率、循环速度均小于1%正丁醇水溶液物系。Average gas holdup in riser and liquid superficial velocities in downcommer were studied on differ- ent bottom tap, the numbers of helical sheets , the bulk concentration of 1 （v）% n-butanol and isopropanol aqueous solution （ 1% ,5%, 10%v.）,type of alcohols, with superficial gas velocities of riser, for the systems of the air being gas phase and water, isopropanol and n-butanol aqueous solution being liquid phase,respectively, in the helical- flow airlift loop reactor with 0.09m in inner diameter and 2.40m in total height. The superficial gas velocities in riser was in the range of 0.46-2.53cm＇s 1. The results show, that average gas holdup in riser was increased and the liquid superficial velocities in downcommer was decreased with the decreasing of bottom tap.The larger the liquid superficial velocities was, the less the numbers of helical sheets was. The liquid velocities of 3 helical sheets was more average 28.3% than the one of 4 helical sheets.The gas holdup in 3 helical sheets was more than the one of 4 helical sheets at the lower superficial gas rates, and the opposite at the higher superficial gas rates. The gas holdups increased with increasing of the concentration of isopropanol aqueous solution. The gas holdup and the liquid ve- locities of the 1% isopropanol aqueous solution were smaller than ones of the 1% n-butanol aqueous solution.

关 键 词：气升式 旋流气升式环流反应器 气含率 循环液速 

分 类 号：TQ052.5[化学工程]