CAJ | 학술논문

为研究多孔陶瓷膜过滤阻力,提出了多孔陶瓷膜双向过滤方式,分析了9通道多孔陶瓷膜在双向过滤时的有效过滤面积和通道截面积,建立了过滤阻力关系式.试验结果表明,跨膜压差0.05~0.10 MPa、错流速度1.8 m/s时,浓差极化阻力Rp为主要过滤阻力;跨膜压差0.10~0.25 MPa、错流速度1.0~2.2 m/s时,吸附沉积阻力Rd为主要过滤阻力;跨膜压差0.15 MPa、错流速度2.2~3.0 m/s时,膜自身阻力Rm是主要过滤阻力;增大错流速度能够有效延缓浓差极化的发生,减小吸附沉积层的厚度,减轻膜污染,延长过滤周期.
위연구다공도자막과려조력,제출료다공도자막쌍향과려방식,분석료9통도다공도자막재쌍향과려시적유효과려면적화통도절면적,건립료과려조력관계식.시험결과표명,과막압차0.05~0.10 MPa、착류속도1.8 m/s시,농차겁화조력Rp위주요과려조력;과막압차0.10~0.25 MPa、착류속도1.0~2.2 m/s시,흡부침적조력Rd위주요과려조력;과막압차0.15 MPa、착류속도2.2~3.0 m/s시,막자신조력Rm시주요과려조력;증대착류속도능구유효연완농차겁화적발생,감소흡부침적층적후도,감경막오염,연장과려주기.
In order to explore the function&type of filtration resistances of porous ceramic membrane,the bi?directional filtering way is proposed,the effective filtration area and channel sectional area of 9?channel porous ceramic membrane are analyzed for the bi?directional filtering way,and the calculation formula for the bi?directional filtration resistances is established. The test results show that 1)the concentration polarization resistance Rp is the main filtration resistance under trans?membrane pressure 0.05-0.10 MPa and cross?flow velocity 1.8 m/s;2)the adsorption and deposit resistance Rd is the main one under trans?membrane pressure 0.10-0.25 MPa and cross?flow velocity 1.0-2.2 m/s;3)at trans?membrane pressure 0.15 MPa and cross?flow velocity 2.2-3.0 m/s,Rm of membrane itself is the main one;and 4)the increase of the cross?flow velocity can effectively delay the occurrence of concentration polarization and reduce the thickness of the sedimentary adsorption layer,thus easing the membrane pollution and extending the filtration cycle.