Maybe- you might have a little too much space under the pans. How much of the pan will be resting on the bricks? you really want maybe 1/2". You will do better if you use a door too, with adjustable air inlet. Also, the block you have tirned is old enough that in has 3 holes. A new one with 2 larger holes should work better in my opinion.
Dave Klish, I recently ordered 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.