--- dermot <[EMAIL PROTECTED]> wrote:
> Thanks everybody for the replies. > I mixed the methoxide with the wvo by gradually > letting the pump suck it from a carboy as the wvo > was being pumped through the processor. > I'm fairly happy that there was good mixing because > of the tests I did after I made the biodiesel. > Remember that I reprocessed the biodiesel a second > time and got no glycerine fall out indicating that > all the product had reacted. > I also did the share test and got a clear > separation. > > I'm fairly sure at this stage that my problem is > that too vigorous pumping produces mayonnaise even > if the biodiesel has reacted fully. > > I am going to try another 50 litre batch and I will > use a motorised stirrer this time. > Has anybody got any idea about the diameter of > impellor I should use and what rpm to use? > I'm going to use a 200 litre plastic barrel to do > the washing. > > Thanks everybody again for the help/suggestions. > > Dermot >Hello Dermot, I think that using an agitator that turnes at 30 to 60 r.p.m. should work nicely. I am building a processor with a wash tank with over 400 u.s. gallon capacity and am using a bulk tank adgitator I purchased used from a dairy farm supplier.My adgit ator is aprox. 14 inches wide and 14 inches high.If your system is smaller just down size some.With an adgitator you can let it run as long as it takes to mix the biodiesel and water wash. I will be setting mine up with a timer so it will shut itself off when it's done. Good Luck|| > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: 02 September 2004 10:58 > To: biofuel@yahoogroups.com > Subject: RE: [biofuel] Re: Pump Washing of biodiesel > > But isnt the mixing period long enough? Say you mix > for a whole day would it still be uneven? > What im really asking is this caused because of > mechanical factors or because a chemical reaction > takes place, too much methroxide exposed to too > little oil... > Just trying to get a better understanding of things. > > Thanks for your time > > -- original message -- > Subject: [biofuel] Re: Pump Washing of > biodiesel > From: bioveging <[EMAIL PROTECTED]> > Date: 01st September 2004 7:9:3 > > The idea of methoxide mixing is to introduce it at a > rythm that will > ensure even distribution throughout, so if you jet > it all in at once > it might not get evenly distributed and that might > leave some oil > unreacted, IMO. > > L. > > --- In biofuel@yahoogroups.com, "Greg Harbican" > <[EMAIL PROTECTED]> > wrote: > > What about when you first mix the methoxide with > the veggie oil, > is there such a thing as " mixing them to violently > " because of > having to powerful a pump? > > > > Greg H. > > ----- Original Message ----- > > From: dermot > > To: biofuel@yahoogroups.com > > Sent: Wednesday, September 01, 2004 07:03 > > Subject: RE: [biofuel] Re: Pump Washing of > biodiesel > > > > > > > > I think, as you rightly suggest, that my pump is > too powerful > and that the > > mixing is too violent. > > > > Thanks for you input. > > > > Regards > > Dermot > > > > -----Original Message----- > > From: bioveging [mailto:[EMAIL PROTECTED] > > Sent: 01 September 2004 02:46 > > To: biofuel@yahoogroups.com > > Subject: [biofuel] Re: Pump Washing of biodiesel > > > > OK, I am no pro at this but even I can see a > couple of points. > Why > > bring it up to 130C ? Did it need dewatering or > was it just a > > precaution? A sample test in a saucepan brought > up to temp would > > have confirmed it one way or the other. > > I have made BD using some really crappy WVO > which titrated at > > 10gr/liter and washed it using a paint stirrer > and it tunred out > OK. > > The procesing temp is too high in your case.65C > will boil off the > > methanol which goes vapour at about 64C. Your > processing temp > should > > not be over 55C (130F). Too high or too low will > result in poor > end > > product.( I know, I've done it) > > 2HP pump huh? Wow ! Bet that thing hums huh? > Might be a bit too > much > > for such a small amount though, although someone > else will have > to > > comment of that as I am not in the know on it. > There has been > talk > > of a 1/2 HP pump for 200gal (757liter) going for > half an hour and > > oing the job. > > Are you using a good scale? How about PH > measuring method? All > > potential variables that can cause trouble. > > I am thinking though that your biggest problem > had to do with the > > processing temperature being too high causing a > loss of methanol. > > > > Anyway, that is only mytake on it, maybe someone > with more > > experience can be more helpful > > > > L. > > > > --- In biofuel@yahoogroups.com, "dermot" > <[EMAIL PROTECTED]> wrote: > > > I would appreciate any suggestions or help > from people who have > > experience > > > with washing biodiesel by using a pump. I have > tried > > unsuccessfully to do it > > > and have ended up with about 50% mayonnaise. > > > > > > Here's what I did: > > > > > > I heated the used oil, which was over a year > old, to 130 > degrees > > centigrade > > > for over an hour to make sure there was no > water present. I > then > > took a > > > sample and allowed it to cool before titrating > it. > > > I got a titration reading of around 2.7. I did > the titration > three > > times and > > > it was always around this figure. I added 4 > grams to this > figure > > and made a > > > few one litre test batches mixing 6.7 grams of > lye to the > > methanol. I used > > > 22% methanol (220 ml) in order to ensure a > complete reaction. > > > > > > I made sure that the lye mixed completely with > the methanol. > When > > I mixed > > > the methoxide with the wvo I got a very good > separation and > > everything > > > seemed fine. > > > I then siphoned off the top layer of biodiesel > and added an > equal > > amount of > > > water to it. I shook it about 15 times and I > got a good > > separation within > > > seconds and after maybe an hour I had almost > completely clean > > biodiesel on > > > top and white coloured water underneath. There > was no middle > > layer. After a > > > few days I siphoned off the washed biodiesel > and washed it a > === message truncated === __________________________________ Do you Yahoo!? Yahoo! Mail - 50x more storage than other providers! http://promotions.yahoo.com/new_mail ------------------------ Yahoo! Groups Sponsor --------------------~--> $9.95 domain names from Yahoo!. Register anything. http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/FGYolB/TM --------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
