What kind of pump? ...
Published by Pat Stanford, General Manager
What kind of pump? Centrifugal or positive displacement? If centrifugal then the pressure and flow are linked. What is the differential pressure across the pressure vessels? Is the module array the same as is assumed in the projection? Are there additional elements or pressure vessels there may be extra pressure required. Is the TDS the same as assumed in the projection? Can you measure the flow into the system? How is the pressure controlled on the concentrate side of the elements? Can you measure the actual flow? Are you getting more than the design permeate flow due to the higher pressure? Many different possible problems to consider. Pump, control valve, element array, feed TDS. Does the pump have too many stages? Good luck.
1 Comment
Dear Pat, your questions answer: 1- Centrifugal pump; 2- three stages RO, first stage dp: 1.3 bar; 2nd stage dp: 0.8 bar; 3rd stage dp: 0.7 bar; 3-The module array is the same 4- There is no additional membrane or vessel, operation conditions are same as design. 5- At concentrate side we have globe valve to adjust the pressure 6- We don't get more than design flow (permeate) by higher pressure 7- Pump is horizontal, multi stages.
Published by Ali Salmani, Process Engineer