Operational manner of the converse permeation film plant, having the computer reading possible storage, and storage for that, the converse permeation film plant null which

摘要

PROBLEM TO BE SOLVED: To most adequately execute the production and operation of a plant by predicting the membrane transfer parameter indicting the membrane performance of a reverse osmosis membrane from the actually measured value of the operation parameter of a reverse osmosis membrane plant in accordance with the concentration polarization equation derived from a concentration polarization model and determining operating conditions in accordance with the predicted value. SOLUTION: In the reverse osmosis membrane (RO) plant, the solvent in a permeated material is permeated through the RO membrane by a pressure difference and the solute is permeated through the RO membrane by a concentration difference. In such a case, a mass transfer coefficient k is determined according to a mass transfer correlation equation (Sh=a.Reb.Scc) indicating the relation between a Sherwood number Sh, Reynolds number Re and Schmidt number Sc. The mass transfer coefficient k is substituted in the concentration polarization equation derived from the concentration polarization model in accordance with the material balance of the solute permeation, by which a membrane surface concentration Cm is determined. Next, the memberane transfer parameter expressing the membrane performance of the reverse osmosis membrane is predicted from the actually measured value of the operation parameter of the reverse osmosis membrane plant and the operation conditions of the plant are determined from the predicted value.