Hi,
I posted to the 100% ethanol post about centrifugal processor not
being able to seperate water from ethanol, yahoo started bouncing my
messages for the second time in as many weeks so i never saw the
replys, general opinion is a seperator wont work.
Anyway I want to throw some thoughts out into the breeze about
using the seperator to remove the glycyrine and FFA out of the
reacted biodiesel. I worked in the navy where we used 4 small
seperators, two for removing contaminants and water out of main
engine sump oil and the other two removed water and solids from
diesel fuel. As we know to seperate the glycerine and FFA out of the
fuel once it is reacted it is left to settle overnight and the FFA
and glycerine settles to the bottom by gravity. Well a centrifugal
seperator ( if I can I will post a picture in the photos section
showing a seperator cross section) achieves the same result by
rotating a stack of conical disks at around 10,000 rpm. the heavy
component is forced to the outside and is discharged to a port, the
fuel passes up the center and is discharged to a second port. any
dirt is traped on the disks and in the bowl. The advantage of this
is that it happens in minutes not hours or days. The seperators I
delt with were the smallest model and they could process 100 litres
per minute. Another feature that is interesting is that for the
centrifuges water could actualy be introduced into the oil or diesel
to assist in seperating water and contaminant from the product, I
bring this up because It may be a way to wash the biodiesel at the
same time as removing the glycerine however I think this may not
work as all the procceses on the JTF site wash after seperating,
Have I missed someting regarding this?.
So now I have given this wonderful info and you all rush out to
find
seperators then find they are too big, too costly and difficult to
find unless you work in a shipyard, I did some looking around and I
believe that the humble cream seperator might just do the trick, a
perfect size for a home biodieseler, hand driven and works on
exactly the same principal. Some experimentation will be required as
to speed it
is spun and it may require some modification I dont know until I or
someone can post some results.
I havent made any biodiesel yet and when I do I am definitly going
to try this out, If any one is willing to give it a go now I would
love to here about it and will be able to sort out any problems
on-line.
Best Regards
Nick
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