| The membrane separation technology usual application object is the liquid, specially watery solution. So-called natrium filter diaphragm, because temporarily stops the molecular weight to be situated between between the counter- seepage membrane and the ultra filter diaphragm (approximately is 200～2000), possibly has about 1nm from this the extrapolation natrium filter diaphragm the pore structure , therefore called it "filters the natrium".Analyzed the operation factor to accept filters the process influence: (1) passes in the different current capacity (360,480,600,720,900mg/l) down inspects in the original water and penetration fluid TOC, the conductivity and NV (the non- volatility group stabs)and elimination rate.(2) through in different service pressure (0.3,0.6,0.9,1.2,1.5MPa) down inspects in the original water and penetration fluid TOC, the conductivity and NV(the non-volatility group stabs)and elimi- -nation rate.(3) passes under the different temperature(28,33,38,43,48oc)down inspects in the original water and pene- -tration fluid TOC, the conductivity and NV (the non- volati- -lity group stabs)and elimination rate.(4) through gets down the inspection operating time in the different pH value to the membrane flux, the membrane average flux and to penetrates in the fluid the TOC interception rate influence .Influences and so on (5) membrane pollution accepts filters the process the factor as well as uses the different purging method to accept the filter diaphragm the pure water flux restoration ratio influence.The experimental result indicated that, after accepts filters processing in the penetration fluid TOC is 14000mg/l, the conductivity is 60μS/cm, the non-volatility groups divides into 0.7‰, DMF94% above penetrate accepts the filter diaphragm, the non-volatility component elimination rate is bigger than 95%.At the same time, may cause with 0.1% NaOH solution flushing to accept the filter diaphragm the pure water flux restoration ratio to achieve 85%. |
PDF Full Text Request