Abstract:
The invention relates to a method and device for continuously desalinating water by reverse osmosis, particularly for desalinating sea water, according to which: salt water (10) is introduced by a delivery pump (1) into a pressure compensation device (2) while under a first pressure (p1); from the pressure compensation device (2), salt water (11) is continuously introduced into a membrane module (3) while under a second increased pressure (p2) and, inside of the membrane module, the salt water is separated by a membrane (6) into desalinated water (12) and concentrated salt water (13); the concentrated salt water (13) discharged from the membrane module (3) is continuously introduced into the pressure compensation device (2) while under appropriately the second pressure (p2) and is used therein for increasing the pressure of the salt water (10) introduced into the pressure compensation device (2) up to approximately the second pressure (p2) and for introducing the salt water (11) into the membrane module (3). In order to prevent malfunctions in the operation of and, possibly, damages to the membrane (6) caused by a reduced flow over the membrane surface, the invention provides that a continuous flow of the salt water (11) introduced into the membrane module (3) is maintained over the membrane surface of the membrane (6) by means of water discharged from a reservoir (15; 403; 20).
Abstract:
A linear spool valve device (26) is employed in a work exchanger system for directing flow of fluid therein. The device comprises a cylinder (27) in which first and second pistons (30, 32) are movably disposed, a high pressure inlet (12) located at substantially a central point along the length of the cylinder, and work exchanger ports (18, 20) located between respective ends of the cylinder and the high pressure inlet. Low pressure outlets (14, 16) can be provided at each end of the cylinder, or alternatively a single low pressure outlet can be provided. The design of the piston/cylinder arrangement is such that each of the work exchangers is alternately completely pressurized, partially pressurized, or completely depressurized, but only one work exchanger at a time is completely pressurized or completely depressurized.
Abstract:
A metering unit (12) is attached to the robot (10) for providing two polymeric materials to a dispenser/mixer module (14) attached to the end of the robot arm (16). The metering unit includes piston (44) located concentrically about the shaft (42) of a dual actuating piston assembly (36) for providing the two polymeric materials in a fixed ratio. A variable rate dispenser (62) is provided for compensating for changes in robot velocity and/or viscosity changes.
Abstract:
A reciprocating pump (10) comprises a first upright leg (12), a second upright leg (14), a first cross-over conduit (18), a second cross-over conduit (18), a lower valve assembly (20) and an upper drive assembly (22). The drive assembly includes plungers (30) which exert alternating downward pumping forces on columns of liquid in the legs (12, 14). The valve assembly is located in a reservoir of water (55) and includes suction openings (80, 64) in the water, which lead into the cross-over conduits (18) and (18), respectively. The valve assembly includes a system of valves and pistons (74, 76) for controlling flow of water into the legs (12, 14) via the cross-over conduits (12, 14) when pumping forces are alternately applied to columns of wafer in the legs (12, 14) wherein water in the legs is raised and lowered in alternating pendulum fashion. Water is drawn into and alternately forced along the cross-over conduits into the legs where the water is pumped from upper ends of the legs (12, 14) via slots (31) defined in the plungers.
Abstract:
Reverse osmosis sea water desalination system, which comprises a reverse osmosis membrane, a boost pump and a feed device for distributing the water supplied by the pump and using the pressure of the water rejected by the membrane, wherein the feed device (2) comprises two hydraulic cylinders (7) and (8), each consisting of two jacketed cylinders (71, 72) and (81, 82), respectively that face one another and are each fastened to intermediate bodies (73) and (83) respectively, with two separate chambers (74, 75) and (84, 85), the pistons (76, 77) and (86, 87) of which are connected by common rods (78) and (88) respectively, a central interconnection body (9) that is fastened to the intermediate bodies (73, 83), which have a number of internal pipes that enter the chambers (74, 75, 84, 85) and enter pipes that (12) communicate with the front (7a, 7b, 8a, 8b) and rear (7c, 7d, 8c, 8c) cavities and a number of sliding pieces (10) and (11) that are housed in the chambers (74, 75, 84, 85) and can move between two end positions.
Abstract:
The invention relates to a method and device for continuously desalinating water by reverse osmosis, particularly for desalinating sea water, according to which: salt water (10) is introduced by a delivery pump (1) into a pressure compensation device (2) while under a first pressure (p1); from the pressure compensation device (2), salt water (11) is continuously introduced into a membrane module (3) while under a second increased pressure (p2) and, inside of the membrane module, the salt water is separated by a membrane (6) into desalinated water (12) and concentrated salt water (13); the concentrated salt water (13) discharged from the membrane module (3) is continuously introduced into the pressure compensation device (2) while under appropriately the second pressure (p2) and is used therein for increasing the pressure of the salt water (10) introduced into the pressure compensation device (2) up to approximately the second pressure (p2) and for introducing the salt water (11) into the membrane module (3). In order to prevent malfunctions in the operation of and, possibly, damages to the membrane (6) caused by a reduced flow over the membrane surface, the invention provides that a continuous flow of the salt water (11) introduced into the membrane module (3) is maintained over the membrane surface of the membrane (6) by means of water discharged from a reservoir (15; 403; 20).
Abstract:
A high pressure fluid pump (10) supplies fluids to a water blasting or cutting gun (14). The pump (10) is preferably of the in-line type, wherein both an inlet check valve (60) and a discharge check valve (62) move linearly along the axis (40) of the plunger (30) during a complete pumping cycle. A plurality of compression rods (42) are spaced circumferentially about a plunger housing (24), and press the plunger housing into sealing engagement with a suction valve seat (56), press the suction valve seat into sealing engagement with a pump discharge housing (36), press the pump discharge housing into sealing engagement with a discharge end plate (38). Seal ring (66) is provided for sealing between a front planar face (114) of the suction valve seat and a rear planar face (112) of the plunger housing. A weep path (116) extends radially outward from the seal ring (66) to release fluids which pass by the compressible seal ring. Plunger housing (24) is provided with a uniform diameter bore (106) extending axially between the plunger seal (54) and the rear planar face (112). A selected bearing material bushing (82) is provided within the plunger housing (24), and a high temperature seal ring (80) is spaced radially outward from a front portion of the bushing to prevent the bushing from becoming seized to the plunger housing. One or more rod front ends (140) may be interconnected with a corresponding compression rod (42) for attaching a support rod (46) thereto during a pump service operation. An alignment connector (28) structurally interconnects a pump rod (26) and a plunger (30), and further reduces the time and expense of pump maintenance.
Abstract:
A metering unit (12) is attached to the robot (10) for providing two polymeric materials to a dispenser/mixer module (14) attached to the end of the robot arm (16). The metering unit includes piston (44) located concentrically about the shaft (42) of a dual actuating piston assembly (36) for providing the two polymeric materials in a fixed ratio. A variable rate dispenser (62) is provided for compensating for changes in robot velocity and/or viscosity changes.