When to stop using the CF

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

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When to stop using the CF

Postby newtoveggie » Sun May 11, 2008 9:08 am

I ran about 6 two hour session using the CF. 6 times I clean the CF and each time the "Cocoa Brown" (bottom of a Hot Cocoa Cup Color) sludge diminished in quantity. I decided to stop even though there was still some sludge visible on the sides of the CF. Do you guys keep going until there is no sign what so ever?
Why is my sludge Brown and all the other pictures I see Black? I have seen lighter shades of brown with milky white but not brown.
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Postby SunWizard » Sun May 11, 2008 9:41 am

Color depends on whats in the VO, I sometimes get lighter brown. I stop when there is <1/16" layer after 2 hours at 90psi, 160F on a 45gal. batch. All 5 of those numbers matter.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
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Doesn't over 'jet' CF'ing cause oil thickening?

Postby td2dv » Sun Jun 22, 2008 9:57 am

I can't find the posting but recall someone saying that the jet driven
CF's beat the oil up pretty bad and cause it to thicken. Is this true and why?
Last edited by td2dv on Sun Jun 22, 2008 10:07 am, edited 1 time in total.
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Calculating recirculating time

Postby td2dv » Sun Jun 22, 2008 10:06 am


When using the 'DieselCraft' jet driven CF in an engine it runs continuously. When used with WVO, it sounds like it is run for a given period of time, determined by the volume of oil. What is that ratio? What if the CF's discharge is collected in a separate container and only passed through the device once, after it is up to speed and stabalized?
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Re: Doesn't over 'jet' CF'ing cause oil thickening?

Postby SunWizard » Sun Jun 22, 2008 11:02 am

td2dv wrote:I can't find the posting but recall someone saying that the jet driven
CF's beat the oil up pretty bad and cause it to thicken. Is this true and why?

No that is completely false.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
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Re: Calculating recirculating time

Postby SunWizard » Sun Jun 22, 2008 11:04 am

td2dv wrote:When using the 'DieselCraft' jet driven CF in an engine it runs continuously. When used with WVO, it sounds like it is run for a given period of time, determined by the volume of oil. What is that ratio? What if the CF's discharge is collected in a separate container and only passed through the device once, after it is up to speed and stabalized?

See the 1st post in the dieselcraft thread for the answers to that. 4 passes is average, so 50 g at 1gpm takes ~ 4 hours. A separate container is no faster, it ends up being much slower.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
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money back. . .

Postby td2dv » Sun Jun 22, 2008 11:32 am

Sun,
If you could have all your DeiselCraft CF set-up money back, and considering the Coop enterprise, would you consider paying twice the price for a 'SimpleCentrifuge' outfit ($1000)?
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Re: money back. . .

Postby SunWizard » Sun Jun 22, 2008 11:50 am

td2dv wrote:Sun,
If you could have all your DeiselCraft CF set-up money back, and considering the Coop enterprise, would you consider paying twice the price for a 'SimpleCentrifuge' outfit ($1000)?

No. The full unit will cost >$1000, and mine was <$300. It still hasn't been tested and there must be some problem with production since they said they would have the complete unit over a year ago and its still not available. Because of no testing we still don't know what flow rate it will process, and I doubt it will be as good at dewatering since it doesn't have the flash evaporation which I find makes dewatering ~4x faster.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
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flash dewatering

Postby td2dv » Sun Jun 22, 2008 12:09 pm

I'm concerned with the water soluble elements in WVO and would prefer pulling the water out as a liquid in hopes of getting the dissolved solids with it. During combustion the solids might not be so good for the engine.
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simplecentrifuge untested?

Postby td2dv » Sun Jun 22, 2008 12:16 pm

Try searching YouTube for simplecentrifuge.
The $500 bowl has a nice conical centering device in the hub. The rest of it can be home or shop made.
Maybe a grand, total, if one hired it out.
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Heating the oil pre-CF

Postby td2dv » Sun Jun 22, 2008 1:05 pm

What is the advantage of heating the oil from 60ºf to 120ºf ahead of the CF?
Benz 240-D
Minneapolis
WVO/RUG (10%) 5 mo/yr
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Heating the oil pre-CF . . . . .

Postby td2dv » Mon Jun 23, 2008 12:37 am

Any experience blending 10% RUG rather than heating the WVO prior to CF?
Benz 240-D
Minneapolis
WVO/RUG (10%) 5 mo/yr
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Re: flash dewatering

Postby SunWizard » Mon Jun 23, 2008 1:15 pm

td2dv wrote:I'm concerned with the water soluble elements in WVO and would prefer pulling the water out as a liquid in hopes of getting the dissolved solids with it. During combustion the solids might not be so good for the engine.

My CF removes water both as a liquid and does flash evap, which is why its so fast. It removes solids whether there is water or not.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
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Location: N. Colorado

Re: Heating the oil pre-CF

Postby SunWizard » Mon Jun 23, 2008 1:16 pm

td2dv wrote:What is the advantage of heating the oil from 60ºf to 120ºf ahead of the CF?

It removes both solids and water ~10x as fast.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1723
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado

Re: Heating the oil pre-CF . . . . .

Postby SunWizard » Mon Jun 23, 2008 1:17 pm

td2dv wrote:Any experience blending 10% RUG rather than heating the WVO prior to CF?

No since if you do that then the hot pan test doesn't work and you have no way to know when you have dewatered. And much of the RUG would evaporate and be wasted.
YVORMV - Your veg. oil results may vary.
95 Dodge Cummins 4x4 SVO WVO conversion.
81 Mercedes 300D- stock and happy on V80/D20 blend.
Low fossil net zero house- 100% solar power and heat.
SunWizard
Site Admin
 
Posts: 1723
Joined: Mon Dec 11, 2006 2:53 pm
Location: N. Colorado


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