规整填料结构对HD低温蒸发系统中蒸发器性能的影响
Influence of the design of structured packing on the performance of an evaporator in a HD low-temperature evaporation system
戴如昊 1付双成 1袁惠新 2雒维文1
作者信息
- 1. 常州大学 机械与轨道交通学院,江苏常州 213016
- 2. 无锡太湖学院智能装备工程学院,江苏无锡 214000
- 折叠
摘要
为了研究HD低温蒸发系统中波纹板规整填料蒸发器的性能,采用计算流体力学软件FLUENT,对填料通道内废水与空气两相之间逆流接触的流体运动、传质传热过程进行了研究.结果表明:随着波宽的增大,气相出口空气中水蒸气含量先增大后减小,而且气相出口空气温度随着波宽的增大也出现先增加后减小的变化趋势,二者都在波宽为6mm(宽高比为1.2)时最大;随着波纹倾斜方向与液滴喷淋的夹角增大,气相出口空气中水蒸气含量先增大后减小,气相出口空气温度也出现先增大后减小的变化趋势,其中,在夹角为45°时的填料内部气相出口空气水蒸气含量和空气温度最大,此时填料内部空气与液滴之间传质传热效率最高.由此可得规整填料蒸发器的波纹波宽和波纹夹角对蒸发传质传热的影响都存在1个最佳值,为规整填料的结构参数优化提供了理论依据.
Abstract
In order to study the performance of an evaporator containing corrugated plate structured packing in the HD low-temperature evaporation system,the fluid motion and mass and heat transfer between the waste water and air in the channel of packing were studied with FLUENT.The results show that both the water vapor content in the air at gas phase outlet increases first and then decreases with the increase of wave width of corrugated plates,and temperature of the air at gas phase outlet increases first and then decreases with the increase of wave width,both of which are maximum when the wave width is 6 mm(the aspect ratio is 1.2).Also both the water vapor content and the temperature of air at gas phase outlet increase first and then decrease with the increase of corrugation angle(the angle between the corrugation and the direction of droplets spraying),and reach maximum when the angle is 45°,at this time,the efficiency of mass and heat transfer between the air in the packing and droplets is highest.There is an optimum value for the influence of wave width and wave angle on evaporative mass and heat transfer efficiency of structured packing evaporator,which provides a theoretical basis for the optimization of structural parameters of structured packing.
关键词
低温蒸发器/规整填料/数值模拟/波纹波宽/波纹夹角Key words
low-temperature evaporator/structured packing/numerical simulation/wave width/corrugation angle引用本文复制引用
基金项目
江苏省科技支撑计划(SBE201470489)
出版年
2024
国家科技期刊平台
NSTL
万方数据