中空纤维膜吸收器净化低浓度甲醛和氨气的模拟研究  

Experiment on Removal of Low-concentration Formaldehyde and Ammonia by Hollow Fiber Membrane

作　　者：姚志良[1] 易玉龙[1] 曹鑫悦 刘伟伟[1] 马永亮[2] 

机构地区：[1]北京工商大学环境科学与工程系,北京100048 [2]清华大学环境学院,北京100084

出　　处：《环境科学与技术》2014年第2期160-162,204,共4页Environmental Science & Technology

基　　金：学科与研究生教育-重点学科-环境工程(PXM2012_014213_000042)

摘　　要：基于疏水性聚偏氟乙烯(PVDF)中空纤维膜吸收器搭建净化低浓度甲醛、氨气污染模拟系统,考察进气流量、吸收剂流量等因素对膜吸收过程净化效果及传质性能的影响。研究结果表明:当进气流量分别为120 L/h和480 L/h时,甲醛净化效率分别达92.4%和86.9%,氨气净化效率分别达94.5%和86.4%。随进气流量的增加,甲醛和氨气的净化效率均降低。当吸收剂流量从100 mL/min增加到600 mL/min,甲醛的净化效率由93.7%升高至95.8%,氨气的净化效率由97.4%升高至98.6%。Based on hydrophobic microporous PVDF hollow fiber membrane, simulation system of purifying low-concentration formaldehyde and ammonia was set up. The impacts of gases inlet flow and absorbent on purification efficiency and mass- transfer coefficient were examined. Results showed that purification efficiency decreased with the increase of gases inlet flow. When the gases inlet flow was 120 and 480 L/h, the removal efficiency of formaldehyde were 92.4% and 86.9%, and ammonia was 94.5% and 86.4% respectively. When the absorbent flow increased from 100 mL/min to 600 mL/min, the purification efficiency of formaldehyde rose up to 95.8% from 93.7%, and ammonia rose up to 98.6% from 97.4%. In addition, the mass transfer model was established, and the results of the model were in good agreement with the experimental data.

关 键 词：疏水性中空纤维膜吸收器 净化 甲醛 氨气 

分 类 号：X701[环境科学与工程—环境工程]