撞击流反应器脱除硫酸尾气中SO_2的研究  

Removal of sulfur dioxide in the sulfuric acid tail gas in impinging stream gas-liquid reactor

作　　者：周玉新[1] 曲志鹏[1] 熊伟[1] 郭嘉[1] 

机构地区：[1]武汉工程大学化工与制药学院绿色化工过程省部共建教育部重点实验室,湖北武汉430073

出　　处：《化学工程》2016年第4期18-21,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21076165)

摘　　要：采用钠-钙双碱法在撞击流气液反应器中脱除硫酸尾气中的SO_2,探讨了模拟硫酸尾气中SO_2质量浓度、吸收液Na OH质量分数、液气比和雾化压力等因素对脱硫效率的影响。研究表明:当模拟硫酸尾气中SO_2质量浓度越低、吸收液Na OH质量分数越高、液气比和雾化压力越高时,脱硫率越高。当模拟硫酸尾气中SO_2质量浓度在800—2 400 mg/m^3范围内时,优化得到的脱硫工艺条件为:吸收液Na OH质量分数为2.0%,液气比为0.34—0.36 L/m^3,对应雾化压力为1—1.2 MPa。在此条件下,脱硫率可高于97%,其脱硫后尾气SO_2质量浓度小于100 mg/m^3,远低于GB26132—2010规定的排放标准。The sodium-calcium double alkali method was used to remove sulfur dioxide in sulfuric acid tail gas in impinging stream gas-liquid reactor. The effects of the SO_2 mass concentration of simulated sulfuric acid tail gas,the Na OH mass fraction of absorbent,liquid-gas ratio and atomization pressure on desulfurization rate were investigated. The results show that with the lower SO_2 mass concentration,the higher Na OH mass fraction,the higher liquid-gas ratio and atomization pressure, the desulfurization rate is higher. When the SO_2 mass concentration of simulated sulfuric acid tail gas is between 800 and 2 400 mg/m^3,the optimized conditions for impinging stream gas-liquid reactor removing sulfur are as follows： the absorption liquid Na OH mass fraction is2. 0%,the liquid and gas ratio is 0. 34-0. 36 L/m^3,the atomization pressure is 1-1. 2 MPa. Under above conditions,the desulfurization rate is above 97%,the SO_2 mass concentration of the tail gas is below 100 mg/m^3,which is far lower than the emission standard stipulated by GB26132-2010.

关 键 词：双碱法 二氧化硫 气液撞击流反应器 硫酸尾气 

分 类 号：X781.3[环境科学与工程—环境工程] TQ052[化学工程]