RE: Pumping Bingham Plastics

From: <Steve>
Date: Fri Oct 08 2004 - 16:10:00 EDT

Hi George
am anticipating some highish pressures and wear will be an issue. Recips have simple geometry and are relatively easy to change out; so they should be at the price.
May look at a simple screw to charge the recip inlet; depends on the thickener configuration.

Cheers

Steve

-----Original Message-----
From: George McKinney [mailto:gmckinney@augustaeng.com] Sent: Saturday, October 09, 2004 4:04 AM To: PipingDesign@yahoogroups.com
Subject: Re: [PipingDesign] Pumping Bingham Plastics

Steve:
Coming in here a bit late, but on the pumps - you may not want a recip type, I would suggest a screw/progressive cavity/peristaltic type pump. Would be more amenable to variations/solids in the flow.

George McKinney

• Original Message ----- From: Steve McKenzie To: PipingDesign@yahoogroups.com Sent: Thursday, October 07, 2004 4:19 AM Subject: [PipingDesign] Pumping Bingham Plastics

   Gents + 2

   I have been requested to prepare some tails disposal pumping options    using thickened tails from a paste thickener.    The process consultant has told me to expect a process fluid with    Bingham plastic properties, a yield stress of around 100Pa and a    consistency of baby poo. Quantities will be around 700TPH solids and    transport distance around 12km.
   All to be sorted by monday - no sweat - who wants a life anyway?    Before I bury my head in books (e.g. Wilson, Addie, Sellgren and    Clift, has anyone seen any good design references for estimating pipe    friction loss with this sort of stuff?    Will probably go to a recip type pump in order to be sure I dont wind    up with a frozen pipe because the thickener had an "episode".

   Thanks

   Steve

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