真空紫外灯动态降解空气中低浓度甲醛研究.pdf

7 2 Vol. 7, No. 2 2 0 0 6 2 Techn iques and Equ ipm ent for Environm ental Pollution Control Fe . 2 0 0 6 * 张运乾 刘震炎 施建伟 上官文峰 ( , 200030) (VOC s), ( 254 nm, 185 nm )O , O ( 0. 16 3 3 3 3 m g/m ) , ( 1m g/m ) ; ; , ; ; VOCs, X131 A 2006) Research on VUV lamp dynam ic degradation of trace formaldehyde in air Zhang Yunqian Liu Zhenyan Sh i Jianw ei ShangguanW enfeng ( School ofM echanica lEng ineering, Shanghai Jiaotong University, Shanghai 200030) Abstract On the ackground of degradatingVOCs in indoor air that is used in central airconditioning, an expermi ental platform w as set up. Vacuum u ltraviolet lamp( 245 nm, 185 nm) that can produce some ozone w as stud ied to degradate formaldehyde. Expermi ental research show s that VUV lamp has h igh degradation ratio on 3 trace formaldehyde ( less than 1mg /m ) when the ozone is less than the ozone value of the national indoor air 3 quality standard ( 0. 16mg /m ). D egradation ratio of formaldehyde is in inverse proportion to air velocity and in let formaldehyde concentration. The degradation rate of formaldehyde is in direct proportion to inlet concentration of formaldehyde, ut in inverse proportion to air velocity. A solute hum id ity has some influence on degradation ratio of formaldehyde; size of the reactor has a rem arka le influence on the purifying effect. A good indoor air quality has een achieved afterVUV eing used in a central airconditioning system Key words dynam ic degradation; VUV lamp; forma