膜分离实验数据处理.doc

超滤膜实验数据整理记录膜后压力P1=0.04MPa, 膜面积0.1/m2 时间浊液体积V1/ml清液体积V2/ml时间t/s总体积V3/ml透过液通量J/(L/m2*h)平均透过液通量J/(L/m2*h) t/min1012033101539.189.1612033101539.1812032101529.122012427101519.069.112527101529.1212527101529.123012525101509912525101509125251015094012621101478.828.8212621101478.8212621101478.825012720101478.828.7812720101478.8212520101458.7 图1膜后压力为0.04MPa时，透过液通量J与时间t关系图膜后压力P1=0.06MPa, 膜面积0.1/m2 时间浊液体积V1/ml清液体积V2/ml时间t/s总体积V3/ml透过液通量J/(L/m2*h)平均透过液通量J/(L/m2*h) t/min10123271015098.981232710150912326101498.942012226101488.888.8812226101488.8812226101488.883012126101478.828.7612026101468.7612025101458.74012026101468.768.7212025101458.712025101458.75012025101458.78.712025101458.712025101458.7 图2膜后压力为0.06MPa时，透过液通量J与时间t关系图膜后压力P1=0.08MPa, 膜面积0.1/m2 时间浊液体积V1/ml清液体积V2/ml时间t/s总体积V3/ml透过液通量J/(L/m2*h)平均透过液通量J/(L/m2*h) t/min1011730101478.828.7611529101448.6411730101478.822011530101458.78.711530101458.711530101458.73011429101438.588.6211529101448.6411529101448.644011428101428.528.5611528101438.5811528101438.585011527101428.528.511427101418.4611527101428.52 图3膜后压力为0.08MPa时，透过液通量J与时间t关系图膜后压力P1=0.10MPa, 膜面积0.1/m2 时间浊液体积V1/ml清液体积V2/ml时间t/s总体积V3/ml透过液通量J/(L/m2*h)平均透过液通量J/(L/m2*h) t/min1011035101458.78.711135101468.7611034101448.642011034101448.648.6210934101438.5811034101448.643011033101438.588.5811033101438.5811033101438.584011033101438.588.5410933101428.5210933101428.525010932101418.468.511032101428.5211032101428.52 图4膜后压力为0.08MPa时，透过液通量J与时间t关系图数据处理举例：以膜后压力为0.04MPa时，,过滤时间为10min的第一组数据为例：V3=V1+V2=120+33=153ml, s=0.1/m2J1=V3/st=153/1000/(0.1*10/60)=9.18L/m2*h, 同理J2=9.18L/m2*h，J3=9.12L/m2*h，故J平均=（J1+J2+J3）/3=9.16L/m2*h实验结论与讨论 由图1-4的透过液通量J与时间图可知：随着时间的增加，相隔相同时间内，膜的透过液通量不断的减小。主要原因是：随着超滤的进行，聚乙二醇由于分子大，被阻挡在膜前，小分子不断通过