喷淋脱硫塔内除雾器性能数值模拟  

Numerical simulation on demister performance of spray tower desulfurization system

作　　者：石振晶[1] 陶明[1] 何育东[1] 何仰朋[1] 郭浩然[1] 

机构地区：[1]西安热工研究院有限公司,陕西西安710054

出　　处：《热力发电》2016年第3期92-97,104,共7页Thermal Power Generation

基　　金：西安热工研究院项目开发发展基金(GA-14-TYK02)

摘　　要：利用计算流体力学(CFD)方法,对不同叶片形式除雾器内的流场进行数值模拟,获得烟气流速、叶片间距、液滴直径等参数对除雾效率及压力损失的影响规律。结果表明:除雾效率随烟气流速和液滴直径的增大而增大,随除雾器叶片间距的增大而降低;弧形板除雾器对液滴的脱除效率最低,但压力损失最小,其次是折形板除雾器,弧形板带单钩和双钩除雾器对液滴的脱除效率较高,但压力损失也较高;弧形板大间距板型,适合作为塔内一级除雾器,用来控制二级除雾器入口液滴质量浓度;弧形板带钩小间距板型,适合作为塔内二级除雾器,用来控制整个吸收塔液滴排放总量。Computational fluid dynamics（CFD）method was used to numerically simulate the flow field of gas and liquid in different types of vane demister.The effects of gas velocity,blade spacing and droplet diameter on demisting efficiency and pressure loss were investigated.The results show that the demisting efficiency increases with the droplet diameter and gas velocity while decreases with the increasing mist eliminator（ME）plate space.The wave-plate ME has the lowest demisting efficiency,but its pressure loss is also the smallest.Then is the baffle-plate,and wave-plate ME with drainage channels and two row drainage channels has the highest demisting efficiency and the most great pressure loss.The wave-plate with large space is suitable for the first ME to control the inlet droplet concentration of the second ME.The waveplate with small space is suitable for the second ME to control the total droplet emission of the entire spray tower.

关 键 词：脱硫塔 除雾器 烟气流速 叶片间距 液滴粒径 除雾效率 压降 数值模拟 

分 类 号：X701.3[环境科学与工程—环境工程]