Carbon Transfer Piping - Friction Loss

Gents+1

this is the second go I have had at this message; the original disappeared.

I am designing a small transfer system for granular activated carbon. It will be transferred from a ground level hopper to an open tank about 5m higher up.
Intend using water as the conveying medium, and an eductor. The pipe will be PE, 63PN8.
I would expect that the carbon will scrape on the pipe walls, so the friction loss calculation is probably an empirical thing.

Has anyone seem any info on friction loss in wet carbon transfer (or other granular material) system? A reference would be appreciated.

I need this info so I can size/design the eductor, as backpressure is one of the major design inputs. If I stuff it up, the hopper will overflow and I will have to turn it into a pressure tank system which would be a pain. Hence my question.

Thanks
Cheers

Steve Received on Wed Aug 18 04:33:00 2004