Desorber apparatus for free&dissolved water removal

Collecting, filtering and dewatering of WVO SVO vegetable oil. For Biodiesel producers too.

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Desorber apparatus for free&dissolved water removal

Postby ecojetta » Sat Mar 15, 2008 9:52 am

I am curious if anyone has tried this method of introducing air bubbles
in the bottom of the oil barrel. The whole thing would look like a Guinness
beer!


http://www.cjc.dk/fileadmin/user_upload ... nciple.pdf
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Postby coachgeo » Sat Mar 15, 2008 11:52 am

yeah its been done. Mostly on the biodiesel side. Since last discussion on bubble drying was years and years ago, now I can only guess why its not done on the WVO side. Think its something to do with bubbeling in higher viscosity WVO ends up just stiring the water back up that was trying to settle out.
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Postby Welder » Sat Mar 22, 2008 9:26 pm

coachgeo wrote:yeah its been done. Mostly on the biodiesel side. Since last discussion on bubble drying was years and years ago, now I can only guess why its not done on the WVO side. Think its something to do with bubbeling in higher viscosity WVO ends up just stiring the water back up that was trying to settle out.


Bubble drying is definately not conducive to settling. They are very different approaches to the same problem.

Since water in WVO (or methanol) slows down the transesterification reaction, a local bio brewer I know spray dries his WVO before reaction. He spray dries his finished esters too.

This info is NOT OT though since spray drying can also be used on WVO. It is one of the ways that CFs dewater. They don't only use centrifugal force, they also evaporate water out of the oil that returns back into the CF barrel. That's why it makes sense to crush the end of the return pipe a little to fan out the returned oil and increase its evaporative surface area. Of course, the better the ventillation availabe to carry the steam away from the barrel, the more efficient the CF return spray will be. Atmospheric humidity will also be a factor...
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Postby Welder » Sat Mar 22, 2008 10:03 pm

Hi EcoJetta.

I just followed the link you gave. Wow, what a seemingly over-complicated system that is!!!

I guess after that article linked to on infopop where the industrial fryer workers had a higher incidence of lung tumors, it makes sense to clean out tiny oil droplets misted into the air exhaust, but what's with the other complexity? The water cleaner makes some sense, but why bother linking together the 2 big tanks?

I'd just use one tank. I'd mist wash, spray dry and bubble dry in the same tank, then filter into a second storage vessel.
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Postby SkySkiJason » Sun Mar 23, 2008 9:38 am

The VO labs buble air/oxygen thru VO to make it polymerize. Does not seem like a good idea.

It would be very easy to check this out. Drop an aquarium air stone in a pot of VO and see what happens. How long will it take? Will heating the VO make it happen faster? What about the presence of copper, mild steel, aluminum? What about presence of fats and water?
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Postby Welder » Sun Mar 23, 2008 5:07 pm

SkySkiJason wrote:The VO labs buble air/oxygen thru VO to make it polymerize. Does not seem like a good idea.

It would be very easy to check this out. Drop an aquarium air stone in a pot of VO and see what happens. How long will it take? Will heating the VO make it happen faster? What about the presence of copper, mild steel, aluminum? What about presence of fats and water?


VO labs? What VO labs? Blackstone doesn't intentionally make vegpoly, do they?

Joe Beatty (chemist) did vegpoly formation experimentation. IIRC, he used heat, copper and maybe even air bubbles to expedite reaction.

Bubble drying happens very quickly relative to vegpoly formation in a veggie tank.
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Postby BMW Fan » Sun Mar 23, 2008 8:25 pm

SkySkiJason wrote:The VO labs buble air/oxygen thru VO to make it polymerize. Does not seem like a good idea.

It would be very easy to check this out. Drop an aquarium air stone in a pot of VO and see what happens. How long will it take? Will heating the VO make it happen faster? What about the presence of copper, mild steel, aluminum? What about presence of fats and water?


I am really curios where this knowledge comes from.
If I would test new vegetable oil for food I would have to avoid all kind of metals beside stainless steel. That's common knowledge in the food industry for centuries.
It is meaningless for us.
All this crazy tests in the open air create polymerization.
Their is no doubt about.
Put veggie on the outside of a copper tube and it turns green.
Run veggie through a closed system for years and the inside keeps clean.
The same with mild steel.
Leave your used plastic cubies open and the paint smell is there in a few days.
The chicken skin follows.
Fill em up to the top, store dark and cold and your oil will be fine for years.
Live can be so easy.

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