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: PipingDesign@yahoogroups.com [mailto:PipingDesign@yahoogroups.com]
On Behalf Of Al
Sent: Wednesday, September 21, 2005 3:14 AM
To: PipingDesign@yahoogroups.com
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: PipingDesign@yahoogroups.com
[mailto:PipingDesign@yahoogroups.com]On Behalf Of Steve McKenzie
Sent: Tuesday, September 20, 2005 5:20 AM
To: PipingDesign@yahoogroups.com
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
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