CAJ | 학술논문

采用疏水性中空纤维膜接触器,以NaHSO3为吸收液处理高浓度甲醛废气.研究了吸收液流量、吸收液温度、吸收液浓度、气体进口流量和气体进口浓度等因素对甲醛去除率和总传质系数的影响.结果表明,当吸收液流量为4.17×10-6m3/s,吸收液温度为60℃,甲醛进气流量为3.7×10-6m3/s,甲醛进气浓度为566 mg/m3 时,甲醛出气浓度可低至2.8mg/m3,甲醛的去除率町达99.5%,总传质系数为4.46×10-5m/s.反应产物(α-羟基磺酸钠)易分离,并可作为重要的有机合成原料或用于制备高纯甲醛而得到充分利用,NaHSO3溶液经适当稀释后仍可作为吸收液循环使用.表明膜吸收法可基本实现高浓度甲醛废气处理的资源化.
채용소수성중공섬유막접촉기,이NaHSO3위흡수액처리고농도갑철폐기.연구료흡수액류량、흡수액온도、흡수액농도、기체진구류량화기체진구농도등인소대갑철거제솔화총전질계수적영향.결과표명,당흡수액류량위4.17×10-6m3/s,흡수액온도위60℃,갑철진기류량위3.7×10-6m3/s,갑철진기농도위566 mg/m3 시,갑철출기농도가저지2.8mg/m3,갑철적거제솔정체99.5%,총전질계수위4.46×10-5m/s.반응산물(α-간기광산납)역분리,병가작위중요적유궤합성원료혹용우제비고순갑철이득도충분이용,NaHSO3용액경괄당희석후잉가작위흡수액순배사용.표명막흡수법가기본실현고농도갑철폐기처리적자원화.
A new technique for treatment and resource utilization of high concentration formaldehyde with NaHSO3 by hydrophobic microporous hollow fiber membrane contactor was developed.Some important factors,such as the flux,temperature and concentration of the absorbent,the flux and concentration of the feed gas were thoroughly studied.Experimental results show that under the proper operation conditions,the absorbent flux is 4.17×10-6m3/s,the temperature of the absorbent is 60℃,the inlet flux and the inlet concentration of formaldehyde are 3.7×10-6m3/s and 566 mg/m3,respectively,the outlet concentration of formaldehyde is as low as 2.8 mg/m3.the removal rate of formaldehyde reaches 99.5% and the overall mass transfer eoeffieient is 4.46×10-5m/s.Moreover,the absorption product,CH2(OH)SO3 Na,can easily be separated and used as organic material or produce pure formaldehyde.The solution of NaHSO3 can be recycled as absorbent only with proper dilu tion.The proposed technique may be a novel way to treat and utilize the high concentration formaldehyde as a resource.