中南大学学报（自然科学版）Issue(1)：330-337,8.DOI:10.11817/j.issn.1672-7207.2016.01.045
湿法脱硫塔内脱硫浆液运动特性
Motion characteristics of gypsum slurry in wet-type desulphurization tower
摘要
Abstract
The 600 MW unit desulphurization spray tower was investigated to analyze the problems existing in the wet desulfurization tower. The trajectories, escape rate and residence time of droplets of different diameters in the spray tower were obtained by numerical simulation methods for the gas-solid two-phase flow in the spray tower. The results show that the droplets greater than 2 mm are distributed uniformly in the tower, while the motion of droplets less than 1 mm in diameter is significantly influenced by the flow field and these droplets mainly concentrate on the low velocity zone. The escape rate reaches about 100%for the droplets less than 0.2 mm in diameter, while it sharply decreases with diameter with respect to those greater than 0.2 mm. Nevertheless, the decline speed slows down when the escape rate is less than 20%. With the increase of diameter, there is a peak on the curve of residence time, and the droplet diameter corresponding to the peak value is exactly the point when the decline speed begins to slow down on the curve of escape rate. The inhomogeneity of the flow field leads to the decrease of escape rate for droplets less than 0.8 mm and the increase of escape rate for droplets greater than 0.8 mm. Meanwhile, the residence time is also reduced.关键词
气液两相流/动量传递/数值模拟/烟气脱硫/石膏雨Key words
gas-liquid flow/momentum transfer/numerical simulation/flue gas desulfurization/gypsum rain分类
化学化工引用本文复制引用
刘嘉宇,刘亚明,郝雅洁,袁竹林,杨林军..湿法脱硫塔内脱硫浆液运动特性[J].中南大学学报（自然科学版）,2016,(1):330-337,8.基金项目
国家重点基础研究发展规划(973计划)项目(2013CB228505)(Project(2013CB228505) supported by the National Basic Research Development Program (973 Program) of China) （973计划）
