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Fluid treatment system

  • US 4,650,586 A
  • Filed: 02/19/1985
  • Issued: 03/17/1987
  • Est. Priority Date: 09/26/1983
  • Status: Expired due to Term
First Claim
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1. A system for purifying water utilizing a reverse osmosis process, comprising:

  • (a) a reverse osmosis unit having an input for feed water to be treated and outputs from which concentrate and permeate are separately discharged;

    (b) pressure controlling means for maintaining predetermined fluid pressures at the concentrate output of the reverse osmosis unit;

    (c) pressurized storage means for storing permeate produced by said reverse osmosis unit;

    (d) system control means responsive to the quantity of permeate in said storage means and operative to terminate a purifying cycle by terminating the communication of feed water to the reverse osmosis unit when a predetermined quantity of permeate is stored in said storage means;

    (e) a flushing means for flushing said reverse osmosis unit with permeate when said purifying cycle is terminated, said flushing means including a flush accumulator for storing a predetermined quantity of permeate; and

    ,(f) a flush control means including a means for pressurizing said accumulator with a fluid pressure when said purifying cycle is terminated whereby said stored permeate is expelled from said accumulator.

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