配NO_2调节NO_x氧化度双循环一塔硫硝同脱研究  

Experimental Study on Simultaneous Removal of SO_2 and NO_x in a Tower by Dual Cycle of Ca(OH)_2 Slurry and NO_2 Injection

作　　者：刘芳[1] 高放[1] 张俊丰[1] 黄妍[1] 杨柳春[1] 

机构地区：[1]湘潭大学环境科学与工程系,湖南湘潭411105

出　　处：《化学反应工程与工艺》2012年第5期422-426,共5页Chemical Reaction Engineering and Technology

基　　金：湖南省自科基金项目(12JJ3020)

摘　　要：以石灰浆液作吸收液,在筛板塔双循环模式下开展了模拟烟气同时脱硫脱硝实验,并通过配加NO2调节NOx氧化度来提高脱硝率。主要研究了液气比、吸收液温度、NO2/NOx(体积比)、SO2浓度等因素对脱硝率的影响。实验结果表明:当烟气量20 m3/h,SO2和NO进气体积分数分别为5.5×10-4和3×10-4,NO2/NOx为0.5,液气比4 L/m3,温度298 K的石灰浆液吸收烟气时,SO2和NOx的吸收率分别可达到96.63%和88.36%,实现了脱硫脱硝同塔完成。Experiments were carried out in a sieve tower operating at dual-cycle mode for desulfurization and denitrification of simulated flue gas. Lime slurry was used as the adsorbent, and NO2 was injected into the gas to adjust the oxidation degree of NOx for improving the efficiency of denitrification. Some factors that influence the efficiency of denitrification such as liquid-gas ratio, absorbent temperature, NOjNOx volume ratio and SO2 concentration were studied systematically. The experimental results indicate that desulfurization and denitrification can be realized simultaneously in one tower. When the volume rate of flue gas is 20 m3/h, the inlet concentrations of SO2 and NO are 5.5x10-4 and 3x10-4 respectively, the volume ratio of NOJNOx is 0.5, the liquid-gas ratio is 4 L/m3, and the absorbent temperature is 298 K, the absorption rate of SO2 and NOx can reach 96.63% and 88.36%, respectively.

关 键 词：氮氧化物 一氧化氮 氮氧化物氧化度 同时脱硫脱硝 

分 类 号：X511[环境科学与工程—环境工程]