Demething Bio
Post Fiend
Joined: Jan 2005
Posts: 26,337
Likes: 12
From: Paradise Found!
I'm using a 4'X8' heat exchanger from an old steam boiler in an insulated box with a thermopane window, on the roof of my shop, and a smaller heat exchanger in the 500 gallon tank. I plan on using a 50/50 mix of glycerol and water for the transfer liquid.
I also plan on installing a valve set so I can transfer the heated fluid to heat the shop when I'm not using the tank.
I tried a small test last summer with a hundred foot coil of black plastic pipe on the roof of my shop, and developed 185 deg temps with a 4 gal/min flow.
I also plan on installing a valve set so I can transfer the heated fluid to heat the shop when I'm not using the tank.
I tried a small test last summer with a hundred foot coil of black plastic pipe on the roof of my shop, and developed 185 deg temps with a 4 gal/min flow.
Logistics Pro
Joined: Mar 2006
Posts: 3,678
Likes: 2
From: Rapid City SD
I am thinking about 3 hrs or so. I need to make myself a more efficient condenser. It take awhile to heat up to 185 degrees, then I let it run until it slows to a drip from a steady stream.
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Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
That's about what I was expecting. What's the least amount of time needed to wait after the reaction to drain off the glycerine? It'd be pretty handy if I could do all that in one day, especially since the fuel would still be somewhat warm.
Post Fiend
Joined: Jan 2005
Posts: 26,337
Likes: 12
From: Paradise Found!
I always wait a minium of 12 hours before draining the glycerol. I've tried lower times, but always had more fall out later, so I wait the 12 hours now.
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Senior User
Joined: May 2006
Posts: 190
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From: Katy, TX
I know it would be more expensive but can you use magnesol to rid all the methanol out of the batch? I thought i read somewhere you can spread the used magnesol outside. If you sun dry it good you can reuse it. false claim?
If you did not demeth first, how much magnesol would use use pricewise
and
How much magnesol do you use pricewise if you demeth first
If you did not demeth first, how much magnesol would use use pricewise
and
How much magnesol do you use pricewise if you demeth first
Post Fiend
Joined: Jan 2005
Posts: 26,337
Likes: 12
From: Paradise Found!
Without removing the methanol, about ten cents/gallon. Remove the methanol first, about 5 cents/gallon. The main reason I use it is because it removes any soap suspended in the bio and any water or methanol.
Magnesol should not be reused even if dried.......
Magnesol should not be reused even if dried.......
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