Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1983-09-26
1986-12-16
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210136, 2102572, B01D 1300
Patent
active
046295682
ABSTRACT:
Apparatus and method for purifying a solvent such as water, using a reverse osmosis process. The apparatus includes a reverse osmosis (R.O.) unit 10, a storage tank 24 for storing permeate produced by the reverse osmosis unit, and a flushing arrangement for cleansing the concentrate side of a reverse osmosis membrane at the conclusion of a purifying cycle. In one embodiment, the storage tank 24 communicates with the input to the R.O. unit through a check valve 26 which allows permeate flow from the tank into the R.O. unit but prevents reverse flow. A flow regulating arrangement 34, 40, 42 maintains one of two pressures at the concentrate output. A system controller 50 controls the communication of feed water to the R.O. unit and the concentrate pressure. At the conclusion of a purifying cycle, the system controller terminates the flow of feed water and reduces the concentrate output pressure resulting in the flow of a quantity of permeate from the storage tank into the R.O. unit to flush the concentrate's side of the membrane. In another embodiment of the invention, a separate flushing accumulator 100 receives permeate during a purifying cycle. When the cycle is terminated, the permeate stored in the accumulator is transferred to the input side of the R.O. unit and flushes the membrane. According to a feature of this embodiment, the R.O. unit 10', the flushing accumulator 100' and the system controller 110' are integrated in a unitary package which is relatively maintenance free.
REFERENCES:
patent: 3493495 (1970-02-01), Mendelson
patent: 3493496 (1970-02-01), Bray et al.
patent: 3498910 (1970-02-01), Mendelson
patent: 3505215 (1970-04-01), Bray
patent: 3616921 (1971-11-01), Bray
patent: 3679055 (1972-07-01), Clark et al.
patent: 3746640 (1973-07-01), Bray
patent: 3786924 (1974-01-01), Huffman
patent: 3846295 (1974-11-01), Gibbs
patent: 3849305 (1974-11-01), Mahjikian
patent: 3939074 (1976-02-01), Bray
patent: 3959146 (1976-05-01), Bray
patent: 3992301 (1976-11-01), Shippey et al.
patent: 4124488 (1978-11-01), Wilson
patent: 4169789 (1979-10-01), Lerat
patent: 4187173 (1980-02-01), Keefer
patent: 4190537 (1980-02-01), Tondreau et al.
Kinetico, Inc.
Spear Frank
LandOfFree
Fluid treatment system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid treatment system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid treatment system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-244311