MODELING OF AN ULTRAFILTRATION PROCESS OF WATER CONTAINING COLLOIDAL SILICA

Attempts of modelling mathematically the removal of colloidal silica f rom waters feeding high-pressure boilers by means of ultrafiltration h ave been presented. Analyses were carried out basing on data of ultraf iltration experiments performed with a tubular polyacrylonitrile membr ane, at colloidal silica concentrations of 2.5-50g/m3. The constants o f the general dependence of the permeate flux on ultrafiltration proce ss parameters (pressure, cross-flow velocity) and the concentration of SiO2 in water, have been determined.