Biopowered - vegetable oil and biodiesel forum
Biodiesel => Biodiesel equipment => Topic started by: Julian on December 05, 2013, 10:34:06 PM
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Fitted my new pump this evening. Managed to integrate it with my spaghetti without too many alterations ... two pipes extended and one judiciously bent.
What a difference. With oil at 8oC it makes 30 psi at the venturi inlet and 15" Hg at the venturi suction. I ran it for about 45 minuets and the oil temperature rose to 22oC with no heater! At 22oC, the venturi produces an amazing 27"Hg. Running the Mono in series makes little or no difference. In comparison the old Leo pump didn't even start to move the gauge until the oil was at 40oC and would only make about 12"Hg with oil at 70oC.
It will be interesting to see what difference the new pump makes to my demeth and process times.
Best ten quid I've spent in ages!
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For those of us who dont read *everything* here - what pump is it?
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TAM 120 ... 75 lph
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Whoopi!
Welcome to the bio brewing fraternity, at last.
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I'm envious. I have a selection of high pressure pumps and a shiny JRL multi-port venturi to try, and I'm spending my time hanging doors and building stud partitioning :/
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I'm envious. I have a selection of high pressure pumps and a shiny JRL multi-port venturi to try, and I'm spending my time hanging doors and building stud partitioning :/
Come on man, get your priorities in order.
Tell swmdo that you need the plant to make the bio so you can go and get the stuff you need to do the home improvements FOR HER.
AND the doing it for her just might bring other benefits but don't hold your breath.
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TAM 120 ... 75 lph
Ah a tiddler ;D
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TAM 120 ... 75 lph
Ah a tiddler ;D
How you know he's only got a little one?
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TAM 120 ... 75 lph
Ah a tiddler ;D
How you know he's only got a little one?
Word gets around. Not quite ingrowing apparently
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TAM 120 ... 75 lph
Ah a tiddler ;D
How you know he's only got a little one?
y
Word gets around. Not quite ingrowing apparently
So will he be forever known, from this day forward as Acorn?
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I have 2-off JGS's 110lpm units in a box under the stairs. Im looking forward to fitting them on the next rebuild.
(im half way through turning up the coupling plate to fit the both of them, but, as my lathe is 250 miles away, im not making the best progress....)
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I have 2-off JGS's 110lpm units in a box under the stairs. Im looking forward to fitting them on the next rebuild.
(im half way through turning up the coupling plate to fit the both of them, but, as my lathe is 250 miles away, im not making the best progress....)
And I thought my workshop was far enough, 18ml.
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Well well well, finally you've got around to doing something about the underpowered pump (or should I say pumps).
It's not like we haven't tried to convince you to do it, I mean, the first thread I remember of yours was concluded that you needed to either change the pump or unscramble the pipework.
So what can we take from this, some do heed the advice given to then, some take some time to implement it, and some, like Julian, struggle on defiantly for many years before giving in.
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I do hope your leg feels at least 2" longer than it was before.
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Well well well, finally you've got around to doing something about the underpowered pump (or should I say pumps).
It's not like we haven't tried to convince you to do it, I mean, the first thread I remember of yours was concluded that you needed to either change the pump or unscramble the pipework.
So what can we take from this, some do heed the advice given to then, some take some time to implement it, and some, like Julian, struggle on defiantly for many years before giving in.
Bit harsh!
I'd have put a bigger pump on it long ago, but I wasn't going to spend a fortune doing it. Heather has been sitting in the wings for a couple of years, but she was way too big.
The pump got changed because it came along at a good price the two, inch and a half to one inch reducing bushes I needed cost me nearly half the price of the pump, which I rather resented, but it's up and running for £14.50.
Next you'll be accusing me of slow building work!
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Just dewatered and at 70oC the vacuum gauge reads just about 28"Hg, with a perfect vacuum being in the region of 30"Hg, it's a bloody good pump/venturi combination or my gauge is a little out ... I suspect the latter!
It started condensing at 65oC, way lower than with the Leo, so looking good for demething.
One strange thing ... I had the PID set at 90oC and the shutdown at 93oC and left it to do it's stuff for a little while. When I came back the PID had tripped out on high temperature. This has never happened before and I'm wondering if the temperature rise I saw during testing had any effect. I'm rather doubtful, but I can't think of any other cause.
Another bonus point, despite being much larger, the new pump seem quieter than the Leo.
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Sounds like that new pump is transferring a lot of heat into the bio, is the impeller rubbing the housing ?
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Any idea what power consumption is like on that pump Julian.
The spec says 1500W (as opposed to 330W for a TAM105) but then I suspect it would only use that pumping at it's ridiculously high maximum head of 65m.
I bet the starting current is pretty high though starting a motor like that with the pump full of cold oil.
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Sounds like that new pump is transferring a lot of heat into the bio, is the impeller rubbing the housing ?
I'm sure. It might have something to do with my pipe work and the fact that it's running against a 6mm venturi.
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Any idea what power consumption is like on that pump Julian.
The spec says 1500W (as opposed to 330W for a TAM105) but then I suspect it would only use that pumping at it's ridiculously high maximum head of 65m.
I bet the starting current is pretty high though starting a motor like that with the pump full of cold oil.
Yes, the lights dim slightly when it starts, but according to Keith, it's not that big.
The business end looks to be the same size as Heather, so despite her much bigger motor, I'm wondering if she's the same/similar capacity.
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I'm sure. It might have something to do with my pipe work and the fact that it's running against a 6mm venturi.
Oi, Acorn, your venturi should have a 9mm throat for that 75l/min pump.
Using 6mm jobby is just loading the pump mota and costing more to run.
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I'm sure. It might have something to do with my pipe work and the fact that it's running against a 6mm venturi.
Oi, Acorn, your venturi should have a 9mm throat for that 75l/min pump.
Using 6mm jobby is just loading the pump mota and costing more to run.
Ah ... I've made so many I lose track. Thanks for the heads up, I'll untangle some of my pipe work and check the size.
What ever size it is, based on your calculations, it will probably be too small for the pump, but it seems to be performing surprisingly well. Maybe need to open it up to keep the same suction performance, but see if I can get a better oil flow.
Just checked the wiki and for a 75 lph pump the throat should be 8.5mm, but I'll try a couple of batches as is before changing anything.
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The correct size of the throat is 8.92mm but 9mm is close enough.
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As it stands, there are some wonderful noises down stream of the venturi. Wonder if it could be cavitation? If it is it might aid conversion.
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I see the venturi calculator uses a simplified formula, I don't know what it is but it's not producing the correct results.
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As it stands, there are some wonderful noises down stream of the venturi. Wonder if it could be cavitation? If it is it might aid conversion.
The noise could also be the vacuum collapsing on the low pressure side of the throat.
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I see the venturi calculator uses a simplified formula, I don't know what it is but it's not producing the correct results.
Toooonyyyyy
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As it stands, there are some wonderful noises down stream of the venturi. Wonder if it could be cavitation? If it is it might aid conversion.
The noise could also be the vacuum collapsing on the low pressure side of the throat.
Sounds to be coming from the down stream end of the discharge cone ... surely no vacuum at that point. Also if the vacuum was collapsing and re-establishing wouldn't that show up on the gauge with the needle vibrating.
Just thinking back to that utube video where they were producing cavitation with a partially closed valve.
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What you've described there Julian is exactly what happens on my plant. As you may recall I recently added a new, more perfectly formed, venturi with a throat of 9.5mm . You may also recall that I mentioned the possibility of cavitation from the previous venturi (9.3mm). The new one is just the same.
I overcome the noise by allowing the vent valve to be slightly open.
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Ran a batch today. Very pleased with the pump, processing times are about 2/3 what they used to be and demeth time is brilliant. I got a litre in the first 10 minutes and 5 ltrs in the first hour.
I ran it for an hour and a half and managed to squeeze 6 ltrs out ... well pleased with my 14 quid investment ... everything is good with the world ... well almost everything. Just need a buxom blond waiting for me upstairs with a large glass of Laphroaig.
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Just need a buxom blond waiting for me upstairs with a large glass of Laphroaig.
All you'll get is Jim or Chunder in stockings and suspenders.
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Just need a buxom blond waiting for me upstairs with a large glass of Laphroaig.
All you'll get is Jim or Chunder in stockings and suspenders.
And a wig, he wants Blonde.
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Think I'm going to need a bigger condenser ....
(http://www.palmergroup.co.uk/Bio/Vapour from condenser.JPG)
I've seen this before when demething, but not dewatering.
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Bleedin' 'ell, what you got in your reactor, 50% water?
Nah, that's dry ice in the jar.
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1 x quad core added to your santa's list.
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Really weird, just like steam but cold! As it was only water, I let it run like this for a while to try and speed the drying.
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1 x quad core added to your santa's list.
No, Santa has already bought me the electronics and stepper motors for a 3D printer, shame he didn't give me a brain capable of making the bloody things work!
I'll have to go it alone on the condenser, but I've had some further ideas about that design I posted up on the VOD a long time back ... it's on the list.
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Looks like the new pump/pipework combo is causing an emulsion during pump washing. This was a duff batch, half reprocessed and needed far more acid than normal to neutralise, but all the same something I'm going to have to watch out for ...
(http://www.palmergroup.co.uk/Bio/Emulsion during wash.JPG)
Left is a sample taken during the fourth wash after the acid wash.
Middle a sample taken after settling in the processor of the tail end of the emulsion when draining the wash water.
Right is the same phase as above but split with 40% sulfuric ... took a fair amount to split it quickly.
I'm assuming this is a wholly mechanically created emulsion.
If this continues the solution (besides building my square processor) will be to add a valve to the TAM suction so I can use the full flow of the Mono for washing. The Mono has a nice and gentle pumping action.