BOILER FEED WATERUltrafiltration of demineralized water having colloidal silica has become appreciated as a suitable method of protecting steam turbines from colloidal silica. In this investigation a laboratory set-up of tube polyacrylonitrile and polyvinyl chloride membranes was employed. In the first ...
The initial salt water flux was 1.9 × 10−5 m3/m2s for both experiments. After 5 h of filtration, the permeate flux decreased by 33% and 36% for 300 ppm and 500 ppm, respectively, whereas the observed rejection declined about 8% for both. For 500 ppm silica concentration, the ...