Reverse osmosis energy recovery system

AI Thread Summary
The discussion centers on the feasibility of using a pressure exchanger or energy recovery turbine in reverse osmosis (RO) systems to reduce the pressure of reject brine fluid below the inlet pressure of the raw feed water. Participants seek clarification on how this process works, including the mechanics of a pressure exchanger and the necessary system parameters. Questions are raised about maximum pressure limits and the extent of pressure drop achievable. Additionally, there is a request for detailed system drawings to better understand the internal arrangements and operational principles. Overall, the conversation aims to deepen understanding of energy recovery in RO systems.
dhinesh.t
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I want to know the possibility for reducing pressure of reject Brine fluid below the inlet pressure of raw feeding water to RO by a pressure exchanger / Energy recovery turbine in Reverse osmosis system. If its possible, how it works? Please help me in this regards.
Thank you
 
Engineering news on Phys.org
http://cr4.globalspec.com/thread/82982/Reverse-osmosis-Energy-recovery
... the same questions apply here too. vis:
What's a "pressure exchanger"?
Could you supply a detailed drawing for analysis?
 
A question like that needs a lot more information.

what is the max pressure, how much pressure drop?

Those are just a few question if possible can you post some system drawings.
 
Please go through the following link.

http://www.slideshare.net/dhinesht88/1-16197873

note the inlet & outlet parameter of energy recovery turbine. I want to know, how is it possible to lower the pressure at point 5 below the pressure at point 2.

Does anyone knows the internal arrangement of the same?

kindly help me to understand.
 

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