Method of recovering energy from reverse osmosis waste streams
First Claim
1. A method of improving the energy efficiency of operation of a reverse osmosis system by recovering and transferring energy from at least one fluid waste stream of the system to at least /ne fluid stream of feed liquor being pumped into the system through transfer of fluid pressure using at least one work exchange cylinder and controlling paths of flow of the fluid streams by means including rotation of at least one valve spool piece that is fluidly connected to the at least one work exchange cylinder.
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Accused Products
Abstract
Hydraulic energy is recovered from the waste brine through a control device, having a central rotatable spool piece controlling fluid flow paths therethrough. The control device, in turn, directs the brine stream of reverse osmosis systems by diverting the brine into work exchangers used to pressurize the feed liquor. All components are made of corrosion resistant materials suitable for use in brine environments. Membrane pressure is held stable by equalization lines within the control device. System capacity can be adjusted externally by changing control dwell time.
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Citations
10 Claims
- 1. A method of improving the energy efficiency of operation of a reverse osmosis system by recovering and transferring energy from at least one fluid waste stream of the system to at least /ne fluid stream of feed liquor being pumped into the system through transfer of fluid pressure using at least one work exchange cylinder and controlling paths of flow of the fluid streams by means including rotation of at least one valve spool piece that is fluidly connected to the at least one work exchange cylinder.
Specification