slurry pipe lines / pump systems
slurry pipe lines / pump systems
(OP)
Hi
where can I get design guidelines on slurry pumping systems?
I want to know what to do to prevent settlement on pump shut down.
where can I get design guidelines on slurry pumping systems?
I want to know what to do to prevent settlement on pump shut down.





RE: slurry pipe lines / pump systems
is Hydraulic Institute
or try pump manufacturers like
www.giwindustries.com
"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut."
-- by Albert Einstein
RE: slurry pipe lines / pump systems
http://
David Baird
mrbaird@hotmail.com
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: slurry pipe lines / pump systems
BHRA also have conference proceedings of their bi annual slurry transport conferences.
Some books worth investing in.
Slurry Transport Using Centrifugal Pumps- Wilson Adddie & Swift
Design of Slurry Transport Systems- BE Jacobs
Non Newtonian Flow in the Process Industries- Chabbra & Richardson
RE: slurry pipe lines / pump systems
what advice do you have to prevent settlement of slurry in the the line on pump shut down(stop of flow).
RE: slurry pipe lines / pump systems
Generally slurry lines need to be routed with maximum slope so that they are self draining. No pockets, dead ends etc.
Flush connections with minimum distance have to be foreseen upstream and downstream of valves etc. in order to remove plugging.
Eccentric reducers should be installed FOB (Flat on Bottom) in the suction line of the pumps with slurry service.
Special Valves (Piston type RAM-Valves or tank bottom valves) should be installed at places were plugging is likely to happen (pump suction line) to ensure flushing and draining.
Best
Oliver
RE: slurry pipe lines / pump systems
Size consist of particles
Size distribution of particles
Density of each consist
Density of carrier fluid
Velocity in pipeline
Yield shear strength of slurry
temperature
pH
Shape of particles
% of fines that may form a carrier liquid
diameter of pipeline
length of pipeline
chemical reactions that may be taking place
If you dont want particles to settle you may have to form a gel using an additive that will keep the particles in suspension. This happens in food preparations. Yoghourt with strawberries for instance.
RE: slurry pipe lines / pump systems
Based on your application and layout, we try to vertically layout the discharge pipe to reach the high point as soon as possible and then slope (say 2% to 5% as a guideline) toward discharge end so when you stop the pump, most of the slurry will flow to the discharge. Some solids will settle anyway but it does not matter in most cases.
At the suction line, we normally use an automatic knifegate valve that's interlocked with the pump. When pump's shut down, the KG valve is then closed and an automatic drain valve is opened to drain the slurry in the suction pipe, in the pump and part of the discharge pipe. The drain pipe shall be big enough to reduce the drain time. Some solids will still settle anyway. If that does not bother you, you even do not have to flush it all the time.
RE: slurry pipe lines / pump systems
I have learned a few new things regarding slurry systems
especialy Eccentric reducers FOB (Flat on Bottom) and automatic knifgate valves on the suction line.
what about automatic flushing at pump shutdown?
RE: slurry pipe lines / pump systems
is the drain valve located on the discharge side of the pump?
RE: slurry pipe lines / pump systems
GIW offers a Slurry Transport Class once a year - it sounds like this would be in your best interest. Contact them for details or look on the www.giwindustries.com website. They use the book that stanier mentioned so you bring home a copy. The upcoming class will be the one to attend!
"If A equals success, then the formula is: A = X + Y + Z, X is work. Y is play. Z is keep your mouth shut."
-- by Albert Einstein
RE: slurry pipe lines / pump systems
If the application is critical, e.g., the slurry can clog soon, or the solids are very heavy, large-sized and settle very quickly, very high percentage, or any settlement can cause trouble to the process, you can install a (or a few) auto flush valves to interlock with the the system. In many my applications, I only use quick connects from the hose stations to flush the slurry lines.