C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
182/13
C02F 1/44 (2006.01) B01D 61/12 (2006.01)
Patent
CA 1233128
Abstract: A novel control for use with a reverse osmotic treatment system is disclosed. The unit (9) provides the desired flow of product solution from the system by control- ling a "single" valve (3) disposed on a secondary line for conveying a concentrated solution coming out of a reverse osmotic apparatus (4). One application of this control unit is in desalination of salt water. Once the desired level of the flow of desalinated water (Q1) is initially set, the control unit (9) determines automatically the necessary opening (Av) of the valve in accordance with the performance characteristics (21 to 28) of the components of the desalination system [centrifugal pump (1), reverse osmotic apparatus (4) and the system line]. In response to this determination, the vale develops the desired pressure at the inlet of the reverse osmotic apparatus (4), which then produces desalinated water at a flow rate substantially equal to the initially set value (Q1). In another aspect, the invention provides means (36, 38) for minimizing the power requirement of the centrifugal pump. In a further aspect, the invention provides monitors (Figs. 8, 10, 12 and 13) for evaluating the performance of respective components of the treatment system. The monitors can be used for updating a set of information about the performance of the system with which the control unit is used.
451806
Hiraiwa Ichiro
Taniguchi Shin
Yamada Koichi
Zengo Toshinari
Ebara Corporation
Riches Mckenzie & Herbert Llp
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