筛板塔细颗粒物协同脱除特性实验  

Experimental of enhancement of simultaneous removing fine particle by sieve tray spray scrubber

作　　者：张军[1] 李存杰[1] 郑成航[1] 翁卫国[1] 朱松强 王丁振[1] 高翔[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027 [2]浙江能源集团有限公司,浙江杭州310006

出　　处：《浙江大学学报（工学版）》2016年第8期1516-1520,1599,共6页Journal of Zhejiang University：Engineering Science

基　　金：浙江省重大科技专项计划资助项目(2014C03018);国家杰出青年科学基金资助项目(51125025)

摘　　要：针对常规喷淋空塔无法满足颗粒物协同控制的难题,提出筛板塔强化传质实现协同脱除的方法.基于湿法烟气脱硫中试试验平台,考察湿法烟气脱硫关键工艺参数,包括烟气流速、浆液喷淋量、飞灰浓度、颗粒粒径等对细颗粒物脱除效率的影响规律,并与喷淋空塔脱除特性进行对比.结果表明,在实验工况下,细颗粒物脱除效率大于90%,最高超过95%;脱除效率随烟气流速、颗粒物浓度及浆液喷淋量的增大而提高.颗粒物分级脱除效率曲线呈＂V＂形分布特性,在0.2~1.0μm粒径范围内脱除效率最低;在相同条件下,筛板塔细颗粒物脱除效果显著优于喷淋塔,在0.2~1.0μm粒径段的脱除效率与总脱除效率较喷淋塔分别提高11%和5%以上.A new sieve stray spray scrubber,which can promote the mass transfer of gas-liquid-solid system,was proposed in order to improve the fine particle removal efficiency in wet flue gas desulfurization(FGD)system.A pilot-scale wet FGD system was developed to study the removal characteristics of fine particles.The effects of flue gas flow rate,liquid flow rate,fly-ash loading and particle size on the fine particle removal efficiency were investigated.Results show that the fine particle removal efficiency is higher than 90% under typical working condition,of which the maximum exceeds 95%.The removal efficiency increases with the increase of flue gas flow rate,liquid flow rate and the concentration of particles.The fractional removal efficiency is a V-shaped curve with a minimum at 0.2to 1.0μm.The sieve tray spray scrubber has a better performance than the ordinary spray scrubber under the same conditions;the total removal efficiency and removal efficiency at 0.2-1.0μm can be improved more than 5% and 11%,respectively.

关 键 词：筛板塔 燃煤电厂 细颗粒物 协同控制 排放特性 

分 类 号：X511[环境科学与工程—环境工程]