Pressure exchanger

The Hamma (Algeria) desalination plant, briefly described in the paper, was mathematically modelled in order to check its behaviour in an advanced phase of its design. The plant will employ 288 ERI’s PX units to recover the pressure of the brine discarded from the RO membranes. This way of recoverin

Most large seawater reverse osmosis (SWRO) desalination plants built before 2002 incorporated turbine-type energy recovery devices (ERDs) that were connected with a shaft to the high pressure pump. Both the pump and the ERD had best efficiency points corresponding to specific flow rates and pressure

Energy Recovery, Inc.’s Big Rotor Pressure Exchanger is the result of over 100 years of technology development. Work exchanger devices developed for seawater RO plants are considered by many to be the most important breakthrough in desalination in the last 10 years. What has made this breakthrough p

By defining the combination of high pressure seawater feed pump and energy recovery system as the core hydraulic module of SWRO plants it becomes obvious that this subsystem mainly contributes to the specific water costs by its operational costs and has to be optimized by a complete approach. In the

An RO water desalination system consists of the pre treatment section, the desalination section and the post treatment section. In the new design plants different energy recovery systems are adopted to reduce the energy consumption of desalination section. Among the various energy recovery systems t

A new pressure exchanger (PX) device transfers the energy from the concentrate stream directly to the feed stream. This direct, positive displacement approach results in a net transfer efficiency of over 95%. This efficiency advantage makes it possible to dramatically improve the performance of exis

This paper describes the upgrade of a seawater reverse osmosis (SWRO) unit by replacing the hydraulic turbocharger energy-recovery system with a Dual Work-Exchanger Energy-Recovery (DWEER) system. Before the upgrade, the unit operated at a capacity of 1,071 m³/d, and a specific electricity of 3.00 k