Study on purification effect of formaldehyde in cleanroom by new return air device  

作　　者：XU Kaili 徐凯丽(Key Lab Environm Med,Sch Public Health,Southeast Univ)

机构地区：[1]Key Lab Environm Med,Sch Public Health,Southeast Univ

出　　处：《China Medical Abstracts(Internal Medicine)》2019年第3期140-140,共1页中国医学文摘（内科学分册（英文版）

摘　　要：Objective To effectively reduce the concentration of poisons in cleanroom,protect the health of workers,realize the optimization and automatic control of the new return air device.And the influence of initial concentration,air volume,temperature and relative humidity of formaldehyde on the purification effect of the new return air device was explored.Methods The purification effect of the new return air device installed with the activated carbon and the photocatalyst purification net or ordinary activated carbon purification network was tested in a 60 m3 simulated cleanroom.The concentration of formaldehyde was determined by solution absorption-phenol reagent spectrophotometry.Based on the single factor experiment to determine the combination of two purification nets.The effects of air volume,initial formaldehyde concentration,temperature and relative humidity on the purification effect of the new return air device were investigated by orthogonal test.Then,the performance parameters of the return air device to purify formaldehyde were determined.Results The formaldehyde purification efficiency of the two types of purification nets in the new return air device was higher than that of the ordinary activated carbon purification network(P<0.05).The combination of activated carbon and photocatalyst purification net had no effect on the formaldehyde purification efficiency of the return air device(P>0.05).According to the direct analysis and variance analysis,air volume was the most sensitive factor(F value is 18.894,P<0.05),followed by initial concentration(F value is 16.128,P<0.05),while temperature and relative humidity have little effect(F value is 0.041 and 0.599,respectively,P>0.05).LSD analysis showed that there was no significant difference in the purification efficiency of formaldehyde between 475 m3/h and 626 m3/h(P>0.05).From the perspective of formaldehyde purification efficiency and energy saving,when the air volume was set to 475 m3/h,the new return air device had higher purification efficiency for high c

关 键 词：FORMALDEHYDE EFFECT ordinary 

分 类 号：O64[理学—物理化学]