摘要
引言
空气吹脱是废水净化处理的一种重要过程,主要用于从废水中分离可挥发性物质,以达到废水处理和物质回收利用的目的,实现这种过程的气-液传质设备主要是填料塔。为了满足吹脱含有固体悬浮颗粒,或在吹脱过程中易产生固体产物的复杂废水的需要,同时提高过程传质效率,开发出了几种新型高效的无填料气一液传质设备。
Water-sparged aerocyclone(WSA)is a new type of gas-liquid mass transfer equipment with high efficiency.The gas phase pressure drop characteristics in WSA was investigated in this study.With the increase of inlet gas velocity(ug),the liquid jet presents three patterns: steady-state jet,deformed spiral jet and atomized spiral jet,and the pressure drop curves in WSA can be divided into three different regions,i.e.,low pressure drop,abruptly increased pressure drop and high pressure drop.In the low pressure drop region,the liquid holdup in outlet gas(εL)is almost zero,and the gas pressure drop in WSA(Δp)increases with ug.In the second region,εL develops from zero and Δp increases abruptly.In the high pressure drop region,εL and Δp increase with ug.The mechanism of the three pressure drop regions is discussed.A non-dimensional empirical model is developed for the regions with low and high pressure drop,which correlates the Euler number with the gas Reynolds number based on the available experimental data and can be well used to predict the pressure drop in WSA.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第9期2507-2511,共5页
CIESC Journal
基金
重庆市科技攻关项目(CSTC2009AB1048)~~
关键词
水力喷射空气旋流器
压降特性
液相含率
射流
water-sparged aerocyclone
pressure drop characteristics
liquid holdup
jet