摘要
根据某危废处置公司熔炼炉熔炼炉烟气污染物成分特征,采用"布袋除尘+臭氧脱硝+洗涤塔+石灰石/石膏湿法脱硫塔"工艺进行改造。应用结果表明:该工艺脱硫效率≥98.9%,进烟囱烟气中的二氧化硫浓度由改造前的5 466 mg/Nm^3降至60 mg/Nm^3以下;脱硝效率≥72.72%,进烟囱烟气中的氮氧化物浓度由改造前的550 mg/Nm^3降至150 mg/Nm^3以下;颗粒物入口浓度15 g/m^3,布袋除尘器出口颗粒物20 mg/m^3,每年可减少颗粒物排放量达17 376.8 t;烟气中的二噁英浓度<1 ngTEQ/m^3,经活性炭吸附处理后,可降至0.5 ngTEQ/m^3以下。
According to the composition of flue gas pollutants in a smelting furnace of a hazardous waste disposal company,a process of " bag dust removal + ozone denitration + washing tower + limestone/gypsum wet desulfurization tower" was adopted for the reconstruction. The application results showed that the desulfurization efficiency of this process was higher than 98. 9%,and the sulfur dioxide concentration in the flue gas entering the chimney was reduced from 5 466 mg/Nm^3 to less than 60 mg/Nm^3. The denitrification efficiency was higher than 72.72%,and the NOxconcentration in the flue gas entering the chimney decreases from 550 mg/Nm^3 to less than 150 mg/Nm^3. The concentration of particulate matter was 15 g/m^3 at the inlet of bag filter,and was 20 mg/m^3 at the outlet. The annual particulate matter emission could be reduced by 17 376.8 t. In addition,the concentration of dioxin in the flue gas was less than 1 ngTEQ/m^3,and could be reduced to less than 0.5 ngTEQ/m^3 after activated carbon adsorption treatment.
作者
张攀
ZHANG Pan(Hangzhou Environmental Protection Research Institute of China Coal Technology&Engineering Group,Hangzhou 311201,China)
出处
《能源环境保护》
2020年第4期63-67,共5页
Energy Environmental Protection
关键词
脱硫
脱硝
除尘
熔炼炉
危废处置
Desulfurization
Denitration
Dust removal
Smelting furnace
Hazardous waste disposal
