烟气脱硫脱硝一体化技术实验研究  

Experimental Study on Integrated Technology of Flue Gas Desulfurization and Denitrification

作　　者：宋云华[1] 陈建铭[1] 孟宪强 牛晓红 李正林 刘欣 魏玉胜 SONG Yun-hua;CHEN Jian-ming;MENG Xian-qiang;NIU Xiao-hong;LI Zheng-Lin;LIU Xin;WEI Yu-sheng(Research Center of the Ministry of Education for High Gravity Engineering and Technology,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Silver Lining Science&Technology Co.Ltd.,Beijing 100029,China)

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029 [2]北京阳光欣禾科技有限公司,北京100029

出　　处：《高校化学工程学报》2018年第2期444-450,共7页Journal of Chemical Engineering of Chinese Universities

摘　　要：自制中试规模的双级串联填料塔,以臭氧(O_3)作为氧化剂,对尿素溶液吸收二氧化硫和氮氧化物的工艺条件进行了实验研究。分析了尿素脱硫脱硝的机理,考察了液体流量、停留时间、臭氧使用量、pH等因素对SO_2和NO_x脱除率的影响。实验结果表明,当液体流量0.8 m^3×h^(-1)、停留时间40 s、尿素溶液质量分数20%、吸收温度50℃、n(O_3):n(NO)=1:1、pH为7时,SO_2的脱除率接近100%,NO_x的脱除率可达到87.02%。在本一体化烟气脱硫脱硝过程中烟气中SO_2对脱硝效果有协同作用。Absorption of sulfur dioxide and nitrogen oxides with urea solution was studied in a pilot scale double stage tandem packing tower using O3 as the oxidant,and the mechanism of desulfurization and denitrification was analyzed.Effects of liquid flow rate,residence time,ozone dosage and pH on SO2 and NOx removal rates were investigated.The results show that when studied under conditions of liquid flow rate=0.8 m3·h-1,residence time=40 s,mass fraction of urea solution=20%,absorption temperature=50℃,n(O3):n(NO)=1:1 and pH=7,the SO2 and NOx removal rates are close to 100%and 87.02%,respectively.Moreover,SO2 is found to show synergistic effects on denitrification during flue gas desulfurization and denitrification.

关 键 词：尿素 臭氧 脱硫 脱硝 一体化 

分 类 号：X511[环境科学与工程—环境工程]