Hi Sure a vacuum generator will work for the sequential removal of methanol and water.
Mark --- Myles Twete <[EMAIL PROTECTED]> wrote: > On vacuum: > Once a vacuum is pulled on the chamber, the > power required to pull the > vacuum will be proportional to the rate of > withdrawal of mass or volume at > the vacuum pressure. If you're not pulling off > much or any water, there > won't be much change in vacuum, requiring > little extra power. > > To minimize the power otherwise, limit the > amount of space in the chamber > above the liquid to minimize the work required > by the vac pump. > > Is a waterheater shell thick enough to avoid > imploding with much vacuum? > How thick are their shells? A better > alternative might be an ordinary water > pressurization tank---I have one that's about > 5feet tall, a little over > 2feet diameter and has perhaps 1/4inch thick > walls. It easily handles > positive pressure to 100psi---would likely > handle any vacuum which could be > pulled. > > -Myles Twete, Portland > > -----Original Message----- > > From: girl mark > [mailto:[EMAIL PROTECTED] > > Sent: Monday, April 28, 2003 2:46 PM > > To: biofuel@yahoogroups.com; > [EMAIL PROTECTED]; > > [EMAIL PROTECTED] > > Subject: [biofuel] vacuum drying! > > > > > > I just recently got an almost-free still > (industrial solvent > > recovery still > > with a huge vacuum unit, salivate, salivate) > and started > > thinking about the > > options that opens up for other fuels > (ethanol).. I didn't > > set it up yet as > > we're trenching for power for it next weekend > at the > > earliest, and I don't > > know for sure that its entirely intact. > > > > with my electric heating setup, I've had a > hard time dewatering > > extra-bad-quality WVO. Since I do two-stage > process, I can > > handle high ffa > > content, I just hate dewatering, and I'd like > to expand the > > range of crappy > > oil (McDonald's...) I utilize. > > > > anyway I had a thought that someone else > might be able to > > utilize sooner > > than I would. How about pulling a vacuum on a > container of > > WVO (such as an > > electric water heater) and distilling off the > water vapor at > > a lower temp? > > I haven't built such a unit but it seems like > one way to get > > around the > > awful energy use issues for dewatering since > up to a point, > > it takes less > > energy to operate a vacuum pump than it does > to operate a heating > > element. Refrigerator compressors can pull > some vacuum and are free. > > > > Does anyone know offhand how much vacuum the > fridge > > compressors pull? I was > > thinking additionally about using one of my > 55gallon drums > > for this- turn a > > closed head drum upside down, thread a > heating element into > > the larger > > bung, weld a couple of fittings into what is > now the top, and > > connect them > > to a source of vacuum and an outlet for the > water vapor. I > > know that drums > > can't handle much vacuum, too, but water > heaters are free as > > well so one > > could try that if it collapses a drum (I > prefer drums as they're more > > portable). > > > > can someone point me to where I would find > info on how much > > vacuum one > > needs to lower the boiling point of water, > and by how much? > > > > thanks, > > mark > > e > > > > > > ------------------------ Yahoo! Groups > Sponsor > > ---------------------~--> > > Get A Free Psychic Reading! Your Online > Answer To Life's > > Important Questions. > > > http://us.click.yahoo.com/O10svD/Me7FAA/AG3JAA/FGYolB/TM > > > -------------------------------------------------------------- > > -------~-> > > > > Biofuel at Journey to Forever: > > http://journeytoforever.org/biofuel.html > > > > Biofuels list archives: > > http://archive.nnytech.net/ > > > > Please do NOT send Unsubscribe messages to > the list address. > > To unsubscribe, send an email to: > > [EMAIL PROTECTED] > > > > Your use of Yahoo! Groups is subject to > > http://docs.yahoo.com/info/terms/ > > > > > > ===== Mark Schofield M.Sc B.Eng DHE AMIMechE t 07944 401662 e [EMAIL PROTECTED] Autogas Conversions and LPG Pumps __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer ------------------------ Yahoo! Groups Sponsor ---------------------~--> Rent DVDs Online - Over 14,500 titles. No Late Fees & Free Shipping. Try Netflix for FREE! http://us.click.yahoo.com/GwtQXA/XP.FAA/AG3JAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
