Line velocity and solid content 1

[Enkelaar]

Are there any rules of thumb concerning solid content and line velocities.

For example if I have 5 wt% of sand in water, how do I keep it from sedimentating my lines...?

 

[cvg]

2 - 3 fps minimum velocity

 

[SNORGY]

I think I have a pretty good calculation methodology that you could use, and a rather rudimentary spreadsheet that I developed months ago.

If you want, I can attach a PDF of the calculations involved, but I need to strip out specific references in the title blocks.

The spreadshee is not in a state of complete development and is a bit convoluted, but it is spawned from the formulae developed in the calculations.

Let me know...otherwise refer to GPSA Section 7 Pages 1-4 and turn the theory "sideways"; there is also a book by Govier, Aziz et al called "The Flow Of Complex Mixtures In Pipes" that makes some good attempts at predicting solids transport behaviour.


Regards,

SNORGY.

 

[Artisi]

Typing "settling velocity of solids" into google resulted in some interesting data - suggest you do the same.

 

[Enkelaar]

Snorgy:

That would be very helpful. I am also trying to get the Govier book you mention, however it will be shipped and take a couple of weeks to arrive

 

[Artisi]

Haven't read this thru - but looks like a good source of inf for you

http://www.iwtc.info/2008_pdf/6-7.PDF

 

[SNORGY]

Enkelaar:

I attach a PDF here. I hope you can find it within yourself to forgive the convoluted way in which I formulate rationale and derivations.

The typed output is actually the output from the spreadsheet I developed. I'll attach a version of that later if you find it of value.


Regards,

SNORGY.

 

[Artisi]

Of course with 5% sand there will also be some derating of the pumps performance in terms of flow, head, power input etc.