Biopowered - vegetable oil and biodiesel forum
Biodiesel => Chemistry and process => Topic started by: Julian on October 25, 2017, 11:27:58 PM
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This is something I've tried on several occasions now and it appears to speed the conversion.
With my warren of contorted pipes on the processor, I'm able to run Frankinpump against a partially closed discharge valve. With the oil/bio at around 30°C I usually get around 1 Bar pressure against the venturi, but by partially closing a valve on the discharge of the pump I can comfortably generate 4 Bar (and considerable noise ... it's a ball valve) whilst maintaining a reasonable flow.
The extra turbulence appears to give quite an improvement in time to completion. Anyone else in a position to give this a try and confirm?
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My processor geometry doesn't allow me to do that, but by changing the eductor to a std 1/2" one the delivery line pressure increases to 71psi and this does seem to speed up the reaction as well as heating without the immersion (probably 15degs over 1 hour)
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Yes I have a gate valve in the return to the tank precisely for this :) I think the pump shear helps with molecular mixing.