Vacuum dewatering, another ?

[alaskanvegi]

OK, got my freezer compressor connected to my hot water heater with a 240v, 4500w element running on 120v generating oil temps around 145°F. With the compressor running and pulling 25-27 inHG vacuum and oil heated, how long do I need to pull a vacuum on a tankful? Till steam quits comming out of the compressor exhaust or a certain amount of time?
I tested first batch with the pan test and no bubbles to 330°F

[Jeff47]

Originally Posted by alaskanvegi

OK, got my freezer compressor connected to my hot water heater with a 240v, 4500w element running on 120v generating oil temps around 145°F. With the compressor running and pulling 25-27 inHG vacuum and oil heated, how long do I need to pull a vacuum on a tankful? Till steam quits comming out of the compressor exhaust or a certain amount of time?
I tested first batch with the pan test and no bubbles to 330°F

If your oil is 145 degrees all you need to do is pull a deep vaccum 29 inches for about 20 minutes if you can shake the heater and move the oil around in it. When there is no vapor comming out the pump, shut off the valve to the tank, and let it sit for another 5 minutes and then test it for water. You kinda have to play with this some.

[HorseHauler]

Originally Posted by Jeff47

If your oil is 145 degrees all you need to do is pull a deep vaccum 29 inches for about 20 minutes if you can shake the heater and move the oil around in it. When there is no vapor comming out the pump, shut off the valve to the tank, and let it sit for another 5 minutes and then test it for water. You kinda have to play with this some.

I have a 170 gallon pressure tank that I want to use. Unfortunately I can't shake a 1,300 lb tank of oil! Anyone know if there is some type of "propeller" that could screw into one of the bungs, and mix up the oil, without losing the vacuum? My only other idea was to have 2 bungs connected by a pipe, with a pump in the middle of the pipe to pump the oil around continuously. I dewater my oil pretty darn well now, but I want to pull the filtered oil into this tank and push it back out through a goldenrod filter into the tank. Makes a nice storage vessel too, since its 26" across and 6' tall. And if I could put that vacuum and a water heater element to work, and get every cursed H2O molecule out I might have the perfect setup...

[young grease]

here is a nother possible method to mix your oil.
on the inside of your tank, put a magnetic bar inside, and on the outside, a spinning magnet on the outside. they use this system in chemistry for mixing substances.

[alaskanvegi]

I tried this today. With water heater tank 3/4 full of oil and heating element on I cracked open the valve at the bottom of tank to let a small amount of ambient air into the bottom of tank to gurgle up through oil and stir it up. I kept the compressor running to maintain 26 inHG and let it gurgle all afternoon. Steam and on occasional few drops of water would spurt out of the exhaust tube of the compressor, ran this way for 6+hours. Anybody think the steam is from the moisture in the air or from the oil? I haven't done a hot pan test yet, will check it Sunday. With the bottom valve closed, compressor pulled 29.5 inHG.