1. 1 Reverse Osmosis Design: Designing Effective Reverse Osmosis Equipment for Industrial and Power Generation Applications www.LayneWater.com 1
2. 2 Reverse Osmosis Equipment for Power Generation Primary power generation Reverse Osmosis application is boiler feed water pre-treatment Downstream of clarification and filtration Upstream of demineralization polishing Reverse Osmosis equipment performance directly impacts demin performance and acid/caustic usage. www.LayneWater.com
3. 3 Reverse Osmosis Equipment Definitions Osmosis Pure water diffuses from the dilute side to the concentrated side of a semipermeable membrane. Reverse Osmosis High pressure is applied to the concentrated side of the membrane and pure water flows to the dilute side. Net Driving Pressure The pressure applied to the membrane to create the reverse osmosis. Typically 200 – 450 psi. www.LayneWater.com
4. 4 Designing Reverse Osmosis Equipment for Power Generation Four main components to an RO system Element Array Stage Pass www.LayneWater.com
5. 5 Reverse Osmosis Equipment for Power Generation RO Element types Spiral wound Hollow fiber Large tube Flat plate www.LayneWater.com
6. 6 Reverse Osmosis Equipment for Power Generation RO Array How the elements are grouped together Series Parallel www.LayneWater.com
7. 7 Industrial Reverse Osmosis for Power Generation RO Stage A series of elements linked together such that the reject (concentrated) water from stage 1 becomes the feed water for stage 2. This is done to reduce wastewater and to increase the total recovery from the RO array. www.LayneWater.com
8. A Two Stage RO System for Power Generation www.LayneWater.com
9. Reverse Osmosis for Power Generation RO Pass An arrangement of elements where the permeate from pass 1 becomes the feed water of pass 2. This is done to produce a final product that is more pure than what can be achieved using only one pass. 9 www.LayneWater.com
11. 11 Using Multiple Passes to Improve Permeate Quality in a Power Generation Example Note: Calculated results. Field efficiencies will likely be lower. www.LayneWater.com
12. Using Multiple Stages to Reduce Wastewater in a Power Generation Example Note: Calculated results. Field efficiencies will likely be lower. 12 www.LayneWater.com
13. 13 Critical Next Step! Download and read the complete whitepaper while it is still available: Reverse Osmosis Design for the Power Generation Industry- What You Need to Know http://www.laynewater.com/landing_ro_powerind.html www.LayneWater.com
14. 14 Why Choose Layne for your Power Generation Reverse Osmosis Applications? Total Water Expertise from Source to Discharge! 1. Complete filtration options – From large municipal to light industrial Layne has the technology 2. Hydrology – Layne can locate, quantify and compare all of your water source options 3. Well drilling – No water available? We can access water sources that are beyond the reach others 4. Pipeline Construction – 10 miles from a water source? Not a problem! Get the whole story here! www.LayneWater.com
