before I had an RO and a 3x8 my draws were also barely a trickle. However now with an average of about 10% concentrate and the 3x8 with AUF and AOF, and high flues pan I can draw considerably faster. I draw between 7-8 and sometimes even more when I recirculate to concentrate even more, gal/hr. But, yes, the fire needs to be constant. That is why I fire every 9 minutes using a timer, fire as fast as I can, and only 1 side at a time and my wood is aged at least 1 yr, and split wrist sized. While my boil does slow while I fuel, it does not stop and it is back at full boil within about 3-5 seconds after closing the door.
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.
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