Our
feedstock is chipped and piled at a landfill. We would like to transport
the chips 15 miles to a power plant where we will integrate a gasifier. The
majority of the chips may remain at the landfill, but we would like to store a
weeks worth supply of feedstock at the power plant. I realize that
putting the feedstock in a silo or closed building would be disastrous.
The main question is how to store the weeks supply, 1000 tons, at the
plant...just pile them, three walled building?
Any
help is appreciated
James
Fields
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James,
A silo
would not necessarily be disastrous, though it could have that potential.
Moisture and oxygen content is the critical factor.
A 3
sided building may be the most economically feasable way to store it, but it
does increase the handling costs, unless you put in a feed system right from
the storage building. You will want to keep rain off of it. Rain water is
highly oxygenated.
The
secret will be to continually rotate the feedstock, so it doesn't have time to
build up heat, although if it's already in a pile at the landfill, it may have
finished it's initial heating. Fresh chips are more susceptable to
heating.
The
heat is caused by bacterial action in the presence of oxygen, with enough
moisture present to keep the 'bugs' happy.
http://keithwalkingfloor.com/page3.html
A
walking floor may be of interest to you. These can be retrofitted into a van
trailer to make it a self-unloader, and dump inside your building without 30
foot ceilings. No need to dump in the yard, then carry it with a frontend
loader to the storage building.
They
can also be used to feed the stock out of your storage bin or bunker into a
conveyor on the backside.
An
informal recomendation would be to equip your trucks with a Keith walking Floor
in a 45 foot van trailer. These should be able to haul 25 ton loads. 100 cubic
yards. You'll need 40 loads of storage space, or 4000 cubic yards.
15 feet
high(5 yards) would require 800 yards of floor space. An 80x100 building should
work. Large vents in the peak ot the roof and under the eaves will remove a lot
of moisture for you.
A round
storage bunker or silo would also be usable, but you won't get the surface area
exposure for natural drying.
A 40
foot round structure would need to be piled 20 feet deep to store your reserve
supply.
http://www.laidig.com/brochure-98s.htm
If you
decide to go with a silo, you'll need to unload it.
LOL I
don't get any commission from either of these companies.
Have
you done any planning on the loading of the trucks at the landfill?
This
should give you a few things to consider.
Let me
know if I'm on the right track with your needs.
Motie
Maybe
it's a personal quirk, but can you CC to the Gas list? As long as I am making a
donation of my time, I would like it to benefit anyone else who may be having
problems too.
You may
also get additional replies from someone who has an entirely different
perspective from mine.
