Multi-cylinder reverse osmosis apparatus and method

Details Multi-cylinder reverse osmosis apparatus and method Multi-cylinder reverse osmosis apparatus and method

1981-04-20

1984-02-28

Spear, Jr., Frank A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210652, 2104161, 2104332, 417374, 417541, B01D 3100, B01D 1300

Patent

active

044340567

ABSTRACT:
Multi-cylinder reverse osmosis pump having at least three cylinders, each feed cylinder having a displacer rod carrying a displacer to divide the cylinder into respective pumping and expansion chambers. Each displacer rod has an expansion chamber valve portion directly associated therewith to control flow of concentrate fluid relative to an expansion chamber of a cylinder other than that directly associated with the respective cylinder rod. Dwell is provided for each cylinder to permit initial travel of the displacer rod at the beginning of each rod stroke while the corresponding valve controlling that cylinder is closed. The displacer rods are phased apart so that when a particular rod of a particular cylinder reaches an end of each stroke, another rod associated directly with the valve controlling that particular cylinder is approaching the mid-stroke position thereof so that the valve directly associated with the other rod is closing.

REFERENCES:
patent: 3687289 (1972-08-01), Tischler
patent: 4288326 (1981-09-01), Keefer

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