Reverse osmosis manual operated

Available in one piece or modular version in steel Inox AISI structure for easy installation and maximum reliability over time. Available versions: Manual , They can work independently or together, in order to meet the user s need.

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The RF-RO can be used and configured in modules. The variable modules also permit Compact and lightweight. Recommended for emergency liferafts and individual survival kits. Trusted by militaries and individuals around the globe. Complement Your Desalinator Please refer to our Privacy Policy for details on how NauticExpo processes your personal data.

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There are three different feeding possibilities. Concentration polarization effects are reduced by maintaining the continuity of feed stream flow circulating past the membranes and by enabling operation at a low ratio of permeate flow to concentrate flow without excessive energy consumption. A manually operated membrane separation apparatus according to the invention separates a feed stream into a permeate stream and a concentrate stream which respectively are permeated and rejected by a semipermeable membrane housed in a membrane vessel.

The reciprocating pump has two cylinders and two movable pistons. While one piston is drawing feed water into its associated cylinder, the other piston is driving the feed stream to the membrane. The pistons cooperate with piston rods which extend to a pump handle. The pump handle is reciprocable and is mechanically connected to the pistons to apply a reciprocating action to the pistons. The inlet conduit communicates with the pumping chambers and with a feed source to admit the feed stream into the pumping chambers, and the outlet conduit communicates with the pumping chambers and with the membrane vessel to carry the pressurized feed stream from the pumping chamber to the feed side of the membrane.

The membrane separates the feed stream into the permeate and concentrate streams. The concentrate stream exits the membrane into the concentrate side of the membrane vessel. Further, the pressure across the membrane is constant maximizing the flow of permeate through the membrane.

A method of membrane separation according to the invention uses an apparatus as generally described above and is characterized as follows. The apparatus consists of a two piston and two cylinder pump configuration that in conjunction with check valving, draws a feed stream into the cylinders and pressurizes the feed stream. While one piston draws the feed stream into the system, the other piston simultaneously pressurizes the feed stream.

The pressurized feed stream is fed to the feed side of a membrane vessel which conducts the feed stream to a membrane that separates the feed fluid into permeate and concentrate streams.

The two piston, two cylinder system allows an operator to manually operate the unit. The two pistons and piston rods are sized so that the force exerted by the operator on the pistons to pressurize the fluid is minimized while at the same time pistons are sized to move the correct volume of the feed stream through the system. Referring to the drawing, an embodiment of the invention is shown generally at 10 and comprises a reciprocating pump 12 and an drive arm 14 mechanically connected to the pump The reciprocating pump 12 has two pump cylinders 16, 18 and two movable pistons 20, 22 received thereon.

The pistons 20, 22 cooperate with piston rods 24, 26 which are pinned to the pump arm The pump 12 further comprises a support wall The pump arm 14 is rotatably pinned to the upper portion of the wall as shown, which wall functions as a fulcrum for the movement of the piston rods 24, More specifically, the two piston diameters are also sized so that the force exerted by the operator on the pump lever arm actuator 14 is minimized, e.

A membrane unit 30 is divided into two chambers, a feed zone 32 and a concentrate zone The feed stream flows through the conduit 36 and is separated into a permeate fraction 38 and a concentrate fraction 40 which are respectively permeated and rejected by a membrane Inlet conduits 44, 46 communicate between the cylinders 16, 18 and a source 48 via a conduit 50 immersed in the source Non-return check valves 52, 54 admit the feed stream into the cylinders 16, 18 preventing return flow.

Outlet conduits 56, 58 provide fluid flow communication between the cylinders 16, 18 and the feed zone 32 of the membrane unit Non-return check valves 60, 62 admit the pressurized feed stream into the feed zone 32 of the membrane unit 30 whilst preventing return flow.

The feed stream is separated into the permeate fraction 38 and the concentrate fraction The concentrate fraction flows into the concentrate zone 34 of the membrane unit A conduit 68 discharges the concentrate fraction to atmosphere.

A conduit 66 conducts the permeate fraction 38 to the user. The operation of the invention will be described in reference to the following non-limiting illustrative embodiment.

The membrane is designed to operate at its optimum at a pressure of psig. To achieve the correct operating pressure, the pressure relief valve is set to relieve at psig. The cross sectional area of the cylinder and the stroke length ratio of swept length of piston rod and cross sectional area of cylinder is determined is as follows.

Arbitrarily choosing 0. Arbitrarily choosing 1. The force required by a person to achieve the required pressure with this cylinder diameter based arbitrarily on a 12 inch lever arm is determined:. The two pistons 20, 22 each have a surface diameter of 0. The membrane 30 designed for the desalinization of water operates in a pressure range of between to psig. Referring to the drawing when the handle 14 is moved left to right, as viewed, the piston 20 moves left to right drawing fluid into the chamber Specifically, fluid is drawn from the source 24 through the conduit 50, the conduit 44, the check valve 54 and into the chamber The piston 22 moves right to left displacing the fluid that is in the cylinder Fluid is discharged from the cylinder 18 through the conduit 58 through the check valve 62 and into the membrane assembly 30, and more particularly the zone The total displacement of fluid from the cylinder 18 and into the zone 32 is 0.

When the piston 22 has completed its travel in the cylinder 18, the direction of movement of the handle 14 is reversed resulting in fluid being drawn into the chamber 18 and expelled from the chamber As a practical matter, the reciprocating action of the handle is controlled such that there is a continuous flow of feed stream into the zone The foregoing description has been limited to a specific embodiment of the invention.

It will be apparent, however, that variations and modifications can be made to the invention, with the attainment of some or all of the advantages of the invention. Therefore, it is the object of the appended claims to cover all such variations and modifications as come within the true spirit and scope of the invention.