摘要
汞污染是重金属污染的重要组成部分,作为第三大汞排放源的水泥工业是汞污染控制的重点对象,寻找协同控排途径迫在眉睫。对不同规模水泥生产线配备不同形式生料磨后的烟气汞进行了测试分析,结果表明:生料磨在线时,水泥生产线烟气汞为0.35~66.63μg/Nm^(3),其中二价汞为0.28~44.04μg/Nm^(3),零价汞为0.05~22.59μg/Nm^(3),颗粒汞为0~0.05μg/Nm^(3);生料磨离线时,水泥生产线烟气汞为5.10~157.04μg/Nm^(3),其中二价汞为3.96~82.10μg/Nm^(3),零价汞为1.13~74.94μg/Nm^(3),颗粒汞为0~0.25μg/Nm^(3)。水泥生产线生料磨具有协同脱汞的能力,对总汞的脱除率为21%~93%,其对不同形态的汞脱除能力不同,对二价汞的脱除效果最好,其次是零价汞。水泥生产线规模对生料磨的协同脱汞能力有很大影响,随着生产线规模增大,相应生料磨的协同脱汞能力也显著增强。此外,生料磨形式也是影响生料磨协同脱汞能力的重要因素,立式生料磨对各形态汞的脱除能力优于管式生料磨。
Mercury pollution is an important part of heavy metal pollution.Cement industry,as the third largest source of mercury emission,is naturally the key object of mercury pollution control.Therefore,it is urgent to find a cooperative way to control mercury emission.In this paper,the detection of flue gas mercury was performed on cement production line with different sale and raw mill form,it was showed that when the raw mill was on-line,the total mercury concentration in the flue gas after the raw mill was 0.35-66.63μg/Nm^(3) and the concentration of bivalent mercury,zero mercury and particulate mercury was 0.28-44.04,0.05-22.59 and 0-0.05μg/Nm^(3),respectively.When the raw mill was off-line,the total mercury concentration in flue gas after raw mill was 5.10-157.04μg/Nm^(3),and the concentration of bivalent mercury,zero mercury and particulate mercury was 3.96-82.10,1.13-74.94 and 0-0.25μg/Nm^(3),respectively.So,the raw mill of cement production line had the ability of the collaborative mercury removal from flue gas with an average total mercury removal ability of 21%-93%.For the different forms of mercury,the removal ability was different,the bivalent mercury had the best removal effect,which was followed by zero mercury.The scale of the cement production line had a great positive influence on the collaborative mercury removal ability of the raw mill.In addition,the form of raw mill was also an important factor affecting the collaborative mercury removal ability of raw mill.By the test results,it was showed that the removal ability of various forms of mercury by vertical raw mill was greater than that by tubular raw mill.
作者
王小龙
周启昕
周劲松
WANG Xiaolong;ZHOU Qixin;ZHOU Jinsong(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou Zhejiang 310030;College of Energy Engineering,Zhejiang University,Hangzhou Zhejiang 310058)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第5期557-561,共5页
Environmental Pollution & Control
基金
国家环境保护公益性行业科研专项(No.201309018)。
关键词
脱汞
协同
生料磨
水泥
mercury removal
synergy
raw mill
cement
