An apparatus having a plurality of pressure exchangers. Each pressure exchanger includes a first conduit and a second conduit and is operable for pressurizing a low-pressure dirty fluid via a high-pressure clean fluid. Each first conduit conveys the high-pressure clean fluid into a corresponding one of the pressure exchangers and to an adjacent one of the pressure exchangers, and each second conduit conveys a pressurized dirty fluid out of a corresponding one of the pressure exchangers and from the adjacent one of the pressure exchangers. The first conduits collectively form at least a portion of a high-pressure clean fluid manifold distributing the high-pressure clean fluid among the pressure exchangers, and the second conduits collectively form at least a portion of a pressurized dirty fluid manifold combining pressurized dirty fluid collectively discharged from the pressure exchangers.

Various embodiments concern a pneumatic landfill pump cycle counter comprising a spring located within a housing passage and a shuttle comprising a shuttle magnet, the shuttle located within the passage. The shuttle can be configured to move axially by the spring within the passage in an upstream direction to a home position, move axially by one or both of air pressure differential and airflow within the passage in a downstream direction away from the home position to a hold position. The cycle counter can further comprise a counter comprising an element responsive to a magnetic field of the shuttle magnet, the counter configured to increment a numeric count for each complete cycle of the shuttle moving from the home position to the hold position and then back to the home position.

A submerged offshore reverse osmosis desalination apparatus and method uses product water from the apparatus and an onshore cooler or heat exchanger provide or improve the cooling of a Sea Water Air Conditioning (SWAC) system, power plant, data center, Ocean Thermal Energy Conversion (OTEC) system, or Rankine Cycle heat engine.

A submerged offshore reverse osmosis desalination apparatus and method uses product water from the apparatus and an onshore cooler or heat exchanger provide or improve the cooling of a Sea Water Air Conditioning (SWAC) system, power plant, data center, Ocean Thermal Energy Conversion (OTEC) system, or Rankine Cycle heat engine.

A pumping system for pumping a medium is described. The system comprises: at least one transverse pressure exchange chamber, but preferably multiple pressure exchange chambers. Each pressure exchange chamber has a valve arrangement at each end. The system also includes a pressurised discharge at a delivery end of the system and a filling mechanism operable to fill the pressure exchange chamber with the medium. A positive displacement pump is operable to pump a driving fluid in direct contact with the medium so that the medium is pumped from the pressure exchange chamber to the pressurised discharge. A method of pumping a medium is also described.

The present disclosure relates to a pneumatically driven pump for pumping a fluid. The pump may have a pump housing configured to receive a pressurized fluid signal. An inlet screen may be included at an end of the pump housing for admitting fluid therethrough into an interior area of the pump housing. An inlet casting may be included which is disposed within the pump housing adjacent the inlet screen. A poppet valve may be included which is configured to seat against the inlet casting. The poppet valve may have a propeller structure for creating a fluid pulse when the poppet valve seats, which helps to dislodge particles that have collected on the inlet screen, and thus help to maintain the inlet screen in a clean condition.

A pump is disclosed. The pump including an outer casing having a cavity therein; a pump assembly positioned in the cavity of the outer casing, the pump assembly including: a discharge tube; a check valve operably connected to the discharge tube by a coupling; and a multi-float control assembly, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent.

A pneumatic pump control system includes a pump chamber having a top end and a bottom end, an air valve coupled to the top end of the pump chamber and configured to be coupled to a pressurized air source, and a pump chamber valve coupled to the bottom end of the pump chamber. In addition, the pneumatic pump control system includes a discharge chamber having a top end and a bottom end, a discharge fitting coupled to the top end of the discharge chamber, a discharge check valve coupled to the bottom end of the discharge chamber in fluid communication with the pump chamber valve, and an inlet check valve in fluid communication with the pump chamber.

Non-clogging airlift pumps and associated systems and methods employing said pumps. The airlift pumps generally include an enclosed air tank within which is located a hollow cylinder having an open top and a closed bottom wall. A gas (e.g., air) line passes into the air tank for supplying gas thereto. A suction port is located in the bottom wall of the cylinder, and a substantially vertically-oriented discharge pipe passes through a top wall of the air tank such that an intake end of the discharge pipe resides within the cylinder. Multiple airlift pumps may be used in conjunction in a given application.

Non-clogging airlift pumps and associated systems and methods employing said pumps. The airlift pumps generally include an enclosed air tank within which is located a hollow cylinder having an open top and a closed bottom wall. A gas (e.g., air) line passes into the air tank for supplying gas thereto. A suction port is located in the bottom wall of the cylinder, and a substantially vertically-oriented discharge pipe passes through a top wall of the air tank such that an intake end of the discharge pipe resides within the cylinder. Multiple airlift pumps may be used in conjunction in a given application.