摘要
利用燃煤电厂尾部烟道的烟气余热来实现脱硫废水的喷雾蒸发是实现其零排放的有效途径,以国内某燃煤电厂330MW火力机组的烟道为研究对象,利用DPM模型对雾化液滴群在高温烟道内的蒸发及流动特性进行了研究,考察了不同雾化嘴角情况下液滴碰壁情况、不同负荷下液滴的蒸发情况,研究结果表明:在50%、75%、100%烟气负荷工况下,烟气温度越高、烟气速度越快,雾化液滴群完全蒸发所需时间越少,液滴最大蒸发时间在2.85～3.36s之间。在单烟道结构的最佳喷嘴雾化锥角为65°情况下,越靠近烟道内侧,涡的尺寸越大,越有利于促进喷嘴区的局部液滴群不断向其他区域扩散。
It is an feasible way torealize the zero liquid discharge(ZLD)by using the waste heat from the flue gas of the coal-fired power plant to evaporate the spray of the FGD wastewater.In this paper,the evaporation and flow characteristics of atomized droplets in a high temperature flue of a 330MW coal-fired power plant were studied by numerical simulation,and the droplet impinging condition at different atomizing mouth angles and the evaporation of droplets under different loads were investigated.The results show that in 50%,75%and 100%boiler load,the higher the temperature and the faster the speed of the flue gas,the less the time it takes for the complete evaporation of the droplets,and the maximum life time of droplet is between 2.85-3.36s.When the optimum atomization cone angle of a single flue structure is 65°,the size of vortex is inversely proportional to the distance between sprayer and the flue wall,which is conducive to the continuous diffusion of the local droplets from the nozzle region to other regions.
作者
彭歌亮
谈智玲
左蓓萌
陈全喜
付江涛
杨彬
杨仲卿
PENG Geliang;TAN Zhiling;ZUO Beimeng;CHEN Quanxi;FU Jiangtao;YANG Bin;YANG Zhongqing(Hubei Huadian Xiangyang Power Generation Co.,Ltd.,Xiangyang 441004,Hubei,P.R.China;College of Energy and Power Engineering,Chongqing University,Chongqing 400044,P.R.China;Wuhan Tianhe Technology Co.,Ltd.,Wuhan 430077,P.R.China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第11期59-65,共7页
Journal of Chongqing University
基金
国家自然科学基金资助项目(51574185).
关键词
脱硫废水
喷雾蒸发
雾化锥角
数值模拟
FGD wastewater
spray dryer evaporation
spray cone angle
numerical simulation
作者简介
彭歌亮(1977-),男,高级工程师,主要研究方向为火电厂节能环保技术,(E-mail)77821483@qq.com。
