here's another, too bad can't do more than one. have several if it helps. maybe if I emailed them?
2003 Ford Excursion 7.3 2002 TDI New Beetle
January 13, 2009, 08:30 PM
I REALLY like the venturi that Jamesrl made for me. It was reasonably priced and functions perfectly. It was very well constructed and probably the most attractive component on my system.
January 13, 2009, 10:48 PM
Do you have pics you would be willing to share? trying to figure out why our system doesn't work. thanks
2003 Ford Excursion 7.3 2002 TDI New Beetle
January 18, 2009, 11:42 PM
got it to work! not the greatest suction, but enought to de-water the oil. Running the 1st batch tomorrow.
2003 Ford Excursion 7.3 2002 TDI New Beetle
March 20, 2009, 05:24 AM
Originally posted by bj100: Thanks to Graham's generosity in providing his knowledge freely, I have built a processor along the lines of 1-day ecoprocessor.
It's performing very nicely, but I was wondering if it's possible to vary the process slightly. I'm willing to do some experimentation if this hasn't been done, but decided to ask first in the off chance that it's been tried or someone has an answer.
What I am considering is whether it's possible to process the oil with methoxide, do the 5% prewash, and then distill the methanol and dry the biodiesel before allowing the glycerine to settle? By my way of thinking, if I've processed for long enough the reaction should be complete before this point, and therefore it won't matter when I remove the methanol and water.
The attraction is complete distillation in one process, less energy use and slightly faster processing.
There's far greater minds than mine at work on the subject of biodiesel production, so it's highly probable that there's a fundamental misunderstanding in my thinking that prevents my idea being feasbile - if so apologies for the simple question.
Any info appreciated.
Ben, I have successfully demethed the total batch of bio AND glyc together in my GL style processor.
For close ups of venturi see nos 5 and 3, the rest of the pictures show the whole system. The plastic pipe cable tied to the venturi is the sight tube.
The venturi was 22mm pipe narrowed to 10mm, a 8mm hole drilled in the neck and 15mm pipe soldered over the hole.
I used my "old" method of injecting meth, picture 7, when the venturi failed.
The processor is a 200 lt. oil drum with a cone welded to the bottom and immersion heater fiited in the side.
Even with all the insulation and modified to 90 degrees thermostat I could only get system up to 80 centigrade. With this temp and poor venturi I only got a tea cup of water from my drying cycle - what sort of quanities do other people get?
The methanol reclaimation cycle only produced 1 litre - also probally due to the poor venturi.
So any ideas on improving venturi?
Is 80 degrees centigrade hot enough (with good venturi) to dry oil?
Any advice gratefully recieved.
August 24, 2009, 12:19 PM
What is the recommended hose size for the vapor loop and the venturi suction line?
If the venturi suction hose is, say 5/16, then does the other hose in the vapor loop
have to be the same size?
Also, if the venturi is placed at the top of the processor, is there a need for the non return
valve in the suction line?
August 25, 2009, 08:22 PM
I don't know what the recommended size is but I had Jamesrl build my venturi with 3/4" inlet and outlet with a 1/2" male thread on the suction port. I already had some other plumbing stuff built for it. I use 1/2" ID braided nylon clear hose for my vacuum loop.
Hope that helps.
August 28, 2009, 11:24 PM
(There is no need to filter it (all the fine bits and pieces will end up in your glycerol layer). It must have no visible water in it.)
Thank you for doing this. I am still using a apple seed variant but this looks interesting for future consideration. The above caught my eye so I thought I would comment. I used to not filter my oil and all the little bits ended up glued to the inside of my reaction vessel so I bought a 200 micron drum filter to filter that stuff out - much better now.
Dana Knight "dckfly" Boulder, CO
Chevy Silverado Duramax 3 VW TDI (wife and friends)
November 16, 2009, 02:34 AM
Hello all ,I've just finished a GL One Day system and finally have a venturi that will lift the required height and volume.I've fitted a non return valve in the methoxide line but am not confident that the venturi will have the pull to suck through it .The valve is quite heavy !
Is this non return valve necessary ?
November 16, 2009, 04:07 AM
I don't have a NRV on my GL style processor and most folks processors I've seen in the UK don't either.
Thank's Chug , it in the GL schematic but I'll gladly pull it out .
November 16, 2009, 04:32 PM
November 17, 2009, 03:53 AM
Chug , I can't get the 13mm to 8mm recuder here , so used a method suggested by nzunimogger on the venturi thread (a wooden plug turned to the taper then lead poured around it ).It's worked well .I can lift water about 1200mm with no problems but I'm still having troubles , it won't pull through the valve loop but it will pull if it is just a straight line down to a bucket .
I reckon perhaps my pump isn't strong enough ,it's one of those 40 litre /min jobs .It might do the job if someone has set this up perfectly but I don't think thats me .
I think I'll look around for a bigger pump !
I have to admit to getting a bit sick of stuffing around with this .....I'd like to produce some fuel !
November 17, 2009, 05:54 PM
What temp is your wvo when you try to suck it in?
I also have a 35- 40 litre/per/min pump and it won't do anything with wvo until the temp reaches almost 40°C, at 50°C the wvo is much thinner and it really works well then, and at 60°C it's wicked!.
But I now have a jamesrl (ye olde copper basher) venturi fitted and it's sized for the pump and it will start sucking at about 30°C and at 60°C if your not careful it will suck ya shirt off!
Chug , I haven't run any WVO through the rig yet , I'm still running water around and around trying to get the thing to operate as per expectations .It would be good to get this thing going as I have 1600 litres of WVO sitting in 44s and a good ongoing source .My car is a MB 240D.
I wouldn't mind posting a photo of things as they are or emailing it to you so you could tell me which way is up ! Except I have no idea how to post photos here ....I can post photos on other forums ,is this the same , just use something like Picturetrail to host ...then copy and paste the url here ?
November 17, 2009, 10:29 PM
One more thing and maybe another reason for a better pump .I've set up my heater in a box outside the main tank (an old compressor tank 100 l),up high near the venturi ,very similar to a photo on Graham's site .The main volume of oil will not be warmed until the flow pushs oil through this box .The idea was to keep the element covered at all times .
November 19, 2009, 05:29 AM
yes you have to host on a picture hosting site and copy the url location here.
I have a question about the 5% pre-wash that Graham uses.
Could this step be moved to after draining the glycerol? If using the 5% pre-wash, the glycerol would be contaminated with water and couldn't be used to pre-treat WVO.
This is the way I see it, but I haven't done this yet...so i am using a semi-educated view.
I'm referring to the GL1 design, not the push pull.
Ok....so I have been informed about the water. Basically i have been informed water is not necessarily needed or wanted in any process. Water can be used, but is time consuming, and not very beneficial.
Now I want to add a question.
I'm not too hip on the GL1 just having an open vent. I have my reasons. The main reason is, dollar for dollar things do not always work as we plan. For that reason I propose to put on of these on my vent line.
I would like opinions or objections. I should also note, it will be filled with oil, not water.
James LThis message has been edited. Last edited by: J Long,
February 26, 2010, 10:46 AM
Good grief, I have been making bio for 6 years now with more than 250k km done on my own B100. Only recently came to this site and had the revelation that I am still brewing with dinosaurs. I have read and read and read just to catch up.
Q. The venturi is used (a) to mix in the methoxide and (b) to mix in air for drying and demeth. Once the methoxide has been mixed in (the venturi will then start to mix air in), do you bypass the venturi for the rest of the mixing/reaction period or do we continue with the venturi?
Q. Electricity has become very expensive here in the good old RSA, so I am not iterested in methanol recovery. I do however treat the next batch wvo with frist stage glycerol and discard the 2nd stage glycerol. Therefore not interested in whole batch demething. Am I correct to asume that demeth of the remaining bio in the reactor is done via the venturi mixing air in?