Re: Extreme Lumpy fluids - Design Reference.

<a href="http://www.hksystems.com/about_us/associations.cfm">http://www.hksystems.com/about_us/associations.cfm</a>

mhia i think
----- Original Message -----
From: "Steve McKenzie" <Mechproj@xtra.co.nz> To: <PipingDesign@yahoogroups.com> Sent: Wednesday, September 21, 2005 4:01 AM Subject: RE: [PipingDesign] Extreme Lumpy fluids - Design Reference.

> Thanks Al
>
> I have the CEMA (US) and the MHEA (UK) conveyor manuals. These only
> cover traditional chute design, as do my ancient Link Belt catalogues.
> Will start looking for MHA.
>
> Cheers
>
> Steve
>
> -----Original Message-----
> From: <a href="/group/PipingDesign/post?postID=2PlQbwrVb-rFNbLO8zsqorUdo-HM9-x1fV5VBYCOtgnAPE341R0o3Eq3mByoJHT-xYdoqIUnaueyoetnPFoi1_ZvZGw_">PipingDesign@yahoogroups.com</a> [mailto:<a href="/group/PipingDesign/post?postID=2PlQbwrVb-rFNbLO8zsqorUdo-HM9-x1fV5VBYCOtgnAPE341R0o3Eq3mByoJHT-xYdoqIUnaueyoetnPFoi1_ZvZGw_">PipingDesign@yahoogroups.com</a>]
> On Behalf Of Al
> Sent: Wednesday, September 21, 2005 3:14 AM
> To: <a href="/group/PipingDesign/post?postID=2PlQbwrVb-rFNbLO8zsqorUdo-HM9-x1fV5VBYCOtgnAPE341R0o3Eq3mByoJHT-xYdoqIUnaueyoetnPFoi1_ZvZGw_">PipingDesign@yahoogroups.com</a>
> Subject: RE: [PipingDesign] Extreme Lumpy fluids - Design Reference.
>
>
> there was an excellent book from the the materials handling association
> (in the US as youd expect) covered all this the best i've seen. Also a
> series called Conveying xxx (4 titles) out of england,but they were more
> like a conference series only a little design info. back of Link belt
> Manual has a little
>
>
>
> -----Original Message-----
> From: <a href="/group/PipingDesign/post?postID=2PlQbwrVb-rFNbLO8zsqorUdo-HM9-x1fV5VBYCOtgnAPE341R0o3Eq3mByoJHT-xYdoqIUnaueyoetnPFoi1_ZvZGw_">PipingDesign@yahoogroups.com</a>
> [mailto:PipingDesign@yahoogroups.com]On Behalf Of Steve McKenzie
> Sent: Tuesday, September 20, 2005 5:20 AM
> To: <a href="/group/PipingDesign/post?postID=2PlQbwrVb-rFNbLO8zsqorUdo-HM9-x1fV5VBYCOtgnAPE341R0o3Eq3mByoJHT-xYdoqIUnaueyoetnPFoi1_ZvZGw_">PipingDesign@yahoogroups.com</a>
> Subject: [PipingDesign] Extreme Lumpy fluids - Design Reference.
>
>
> Well er
>
> they aint exacery liquids. More like crushed rock with horizontal
> transport by proven conveyors, but vertical transport by chutes. The
> horizontal bit is well covered by countless guides and codes. However
> (semi)vertical (downwards) transport is dealt with in a flimsy manner,
> and I have just had to fly in an overseas specialist to help us improve
> vertical downwards discharge flow from a crusher. The specialist
> advocates smooth self-centralizing passages, computation of trajectories
> and a mantra of free flow. The price to be paid is wear, which I can
> accept if loadings can be kept high and practicable service intervals
> can be arranged. Our previous unwritten philosophy was unwanted energy
> dissipation by rock box which results in a jerky velocity profile
> through vertical conduits . Adopting a free flow philosophy means we
> must shed unwanted energy continually so free-falls are a nono. I expect
> there is a second price to be paid and that is space. The point of this
> meandering is that I have no design reference that deals with the
> gravity transport of slabby solids, and certainly none which takes
> advantage of passive velocity control." Most of my books deal with
> bulk/mass flow only, and the single lump flow perspective is a
> refreshingly new approach.
>
> Has anyone seen papers of publications on handling lumpy solids under
> gravity flow from a single "particle/lump" perspective? If so, a
> reference would be appreciated.
>
> Was going to attempt to justify the relevance of the question to this
> forum, but then decided it was easier to cop the flak.
>
> Cheers
>
> Steve
>
>
>
>
>
>
>
>
>
> =========================================
> PipingOffice - Excel Spreadsheets for Piping Calculations
> http://www.pipingoffice.us/ =========================================
> Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>
> =========================================
> PipingOffice - Excel Spreadsheets for Piping Calculations
> http://www.pipingoffice.us/ =========================================
> Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
> =========================================
> PipingOffice - Excel Spreadsheets for Piping Calculations
> <a href="http://www.pipingoffice.us/">http://www.pipingoffice.us/</a>
> =========================================
> Main site: <a href="http://www.pipingdesign.com">http://www.pipingdesign.com</a>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>

[Non-text portions of this message have been removed] Received on Wed Sep 21 10:05:00 2005