摘要
为了深入认识螺旋管多相流相分离现象,并为新型螺旋管除砂器设计提供指导,本文应用马尔文粒度仪,测量了螺旋管气水砂三相流底部水平段液膜中的颗粒浓度和粒度分布。研究表明:在泡状流和分层流条件下,螺旋管底部水平段可形成稳定的连续液膜流动;在宽广的气速范围内,液膜中的颗粒浓度分布规律均为内弯侧较低、外弯侧较高,说明螺旋管除砂器对于实际生产中流动工况的变化具有良好的适应性;泡状流中提高气速有利于分离;分层流中在中等气速条件下外弯侧颗粒浓度最大,中等气速是相分离的最佳操作工况。
The phase separation phenomena in helically coiled tube multiphase flow is substantial to design innovative curved pipe separator. Particle size and concentration profiles in the liquid film of air-water-sand three-phase flow through a separator prototype were measured using Malvern Particle Meter. The measurement results show that steady continuous liquid film is formed in the lower horizontal part of the helically coiled tube for both bubbly and stratified flow. Particles are concentrated to the outer bend of the curved pipe in a large wide range of gas velocity, indicating that the helically coiled tube separator has good flexibility to the practical flow variation. Increasing gas velocity can enhance the separation efficiency for bubbly flow, while the maximum separation efficiency is available at moderate gas velocity for stratified flow.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第1期69-72,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.59995462)
关键词
螺旋管
气液固三相流
相分布
颗粒
helically coiled tube
gas-liquid-solid three phase flow
phase distribution
particle
