摘要
针对碱炉烟气处理工况中TRS和SO_(2)排放不达标的问题,依据ClO_(2)与硫化物的氧化还原反应原理,采用单塔双循环工艺技术吸收消除污染物气体。吸收塔内每个循环段都是相互独立的闭环回路,通过碱液的连续输送以及对液池pH的实时监控,可以实现塔内双循环区域的高效运行,提高污染物气体的脱除效率。本文分别阐述了臭气成分和去除方法、烟气净化工艺路线、TRS与SO_(2)消除反应原理及单塔双循环吸收工艺原理。现场运行结果表明,单塔双循环二氧化氯法在浆厂硫化物处理方面表现出了良好的脱除效果。烟气经吸收处理后,吸收塔出口TRS浓度<4 mg/Nm^(3)(9%O_(2),干烟气),SO_(2)的浓度<20 mg/Nm^(3)(9%O_(2),干烟气),残氯浓度<8 mg/Nm^(3)(干烟气),符合排放标准。
In order to solve the problem of substandard TRS and SO_(2) emissions in the flue gas treatment of alkali furnaces.According to the principle of redox conducted between ClO_(2) and sulfide,and the pollutant gas was fully absorbed by the single tower double cycle absorption technology.Each circulation section in the absorption tower was an independent closed-loop loop,through the continuous transportation of lye and real-time monitoring of the pH of the liquid pool,the efficient operation of the double circulation area in the tower could be realized and the removal efficiency of pollutant gas could be improved.This paper respectively described odor composition and removal methods,flue gas purification process route,the principle of TRS and SO_(2) elimination reaction and single tower double cycle absorption process.The field operation results showed the single tower double circulation chlorine dioxide method demonstrated good removal effect in the removal of sulfides in kraft mill.After absorption treatment,the concentration of TRS,SO_(2) and Cl2 at the outlet of the absorption tower were less than 4 mg/Nm^(3)(9%O_(2),dry gas),20 mg/Nm^(3)(9%O_(2),dry gas)and 8 mg/Nm^(3)(dry gas),respectively.These data met emission standards.
作者
陈天明
万利远
马斌
Chen Tianming;Wan Liyuan;Ma Bin(Tongxing Environmental Protection Technology Co.,Ltd.,Hefei 230001,China)
出处
《广东化工》
CAS
2023年第21期93-95,共3页
Guangdong Chemical Industry
关键词
单塔双循环
硫化物消除
二氧化氯
排污
浆厂
single tower double circulation
sulfide elimination
chlorine dioxide
pollutant emission
kraft mill
