摘要
烟气湿法脱硫塔内流场的分布直接影响脱硫效率。对一种在喷淋塔内增设脱硫剂旋流雾化层的流场再造脱硫反应方法进行优化,以Fluent软件为平台,通过改变旋流雾化层喷嘴的布置角度、数量以及浆液喷出的速度等参数,对不同工况下脱硫塔塔内烟气流动状况进行了三维数值模拟与分析。研究结果表明：旋流雾化层的直径比d/D为0.6左右,至少设置8个喷嘴才可形成稳定的螺旋场,浆液从喷嘴喷出的速度在15~20 m/s时有利于塔内烟气处于最佳脱硫速率。此结果对大型锅炉的烟气脱硫塔的改造具有参考作用。
The distribution of flow field in the tower of wet flue gas desulfurization affects the desulfurization efficiency directly. A kind of desulfurization reaction method adding swirl atomizing layer in the spray tower was put forward. Based on Fluent software plant form,this paper studied 3D numerical simulation and analysed the flue gas flow features of different conditions in the desulfurization tower,reconstructed and optimized the flue gas flow field by changing the parameters of the spray nozzles such as arrangement angle,amounts as well as flue gas spray velocity. The research results indicated that,if the diameters rate d / D of the swirl atomizing layer was about 0. 6 and the amount of the nuzzles was more than eight,the stable helical field could be formed. In addition,slurry discharged from the nozzle at the rate of 15 ~ 20 m / s was beneficial for the flue gas to be the optimum desulfurization speed range. The result provided reference on the reconstruction of flue gas desulfurization tower for large-capacity boilers.
出处
《环境工程》
CAS
CSCD
北大核心
2015年第10期55-60,30,共7页
Environmental Engineering
基金
广东省科技计划项目(2011B090400289)
2012年广东省重点科技计划项目(2012B091000126)
关键词
脱硫塔
旋流雾化层
流场再造
数值模拟
优化分析
desulfurization tower
tangentially spray
flow field reconstruction
numerical simulation
optimization analysis
