Pulp line pressure drop?
Pulp line pressure drop?
(OP)
Hi everyone!
What calculations do you use for estimating pressure drop for kraft pulp pipes?
I can calculate the pressure drop for water line. Is there a correction factor etc available, which could handle the effect of consistency/ pulp type? I can live with a rough estimate.
Thanks for your time!
What calculations do you use for estimating pressure drop for kraft pulp pipes?
I can calculate the pressure drop for water line. Is there a correction factor etc available, which could handle the effect of consistency/ pulp type? I can live with a rough estimate.
Thanks for your time!





RE: Pulp line pressure drop?
I have seen what you are looking for, but not in the last 10 years or I would be more specific in my comments.
Jack
Jack M. Kleinfeld, P.E. Kleinfeld Technical Services, Inc.
Infrared Thermography, Finite Element Analysis, Process Engineering
www.KleinfeldTechnical.com
RE: Pulp line pressure drop?
As a quick reference, 3.5% Northern Kraft at 190 deg F pumped at 4 ft/sec in a 10" stainless line has a straight pipe friction loss of approx 6 ft/ 100ft. Friction losses for fittings and valves are higher than with water as well (rule of thumb is a 20% increase for every 1% increase in consistency).
All bets are off over 5% consistency...you need to have advice when dealing with medium and high consistency kraft slurries.....it dewaters and turns to presto-logs if you don't know what you are doing.
Good luck,
Dwayne Nyhus,
Manager, Engineering
NorskeCanada Powell River Division