METHOD FOR MAKING PURE WATER

摘要

PURPOSE:To enhance efficiency, by obtaining pure water by combining reverse osmosis filters in a multistage fashion. CONSTITUTION:Supplied water 1 is filtered by a check filter F and raised in pressure by a booster pump P to be supplied to a first stage reverse osmosis filter 2. Conc. water 4 conc. by the filter 2 is combined with supplied water 1 in the inflow side of the check filter F to again form water 3 to be supplied. A part of conc. water is discharged to the outside as discharge water 5 prior to be combined with said water 1. The amount of discharge water 5 is determined corresponding to the quantity of final objective treated water and the objective purity.