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View Full Version : DIY Barrel Evaporator Build (Detailed)



ajschnitzelbank
04-01-2018, 01:18 AM
I’m new to sugaring, and MapleTrader has been a great resource, so I figured I’d add my experience in hopes it will help someone the way so many posts have helped me.

Build take one: Bought a 55 gallon drum from craigslist; burning paint smelled awful, wonder if it was carcinogenic.

Take two: Bought an unfinished 55 gallon drum from local company. Used a six-inch deep steam pan. Only evaporated one gallon per hour – WAY too slow. Lots of soot around pan, probably because I cut the hole a little too big. Burn created tons of coals in the arch.

Take three: From the ground up:

Foundation is some pallets I picked up for free locally. The idea is I can move it around with the tractor from storage to the driveway. Also raises it up so I don’t need to bend over as much. I bolted the arch to the pallet. Price: $0 for pallets, plus a few nails, and $8 for stainless hardware from Lowes. Tools used: crowbar, hammer, drill, screwdriver.

Barrel is an unpainted one from a local company. Price $30.

Legs and door are from a barrel stove kit from Tractor Supply. Price $50. Tools used: angle grinder to cut holes (cutting wheel plus sanding flap wheel, true for all following angle grinder use), drill, screwdriver, wrench.

I lined the bottom of the barrel with firebricks I had lying around.

I bought a cast iron grate to get air under the fire. Price: $50 from Amazon. Tools used: wrench.

Angle iron used to hold pan. Price: $10 for angle iron from local welding supply, a buck for the hardware. Tools used: angle grinder, drill, screwdriver, wrench.

I used ceramic blanket insulation at the back of the pan. I had a hard time cutting the hole to be perfectly tight, so I cut it a little long and utilized the insulation to tighten it up. I used part of the barrel cut out for the pan hole to create a bracket to hold the blanket. Price: $14 for insulation from Amazon, a buck for hardware. Tools, angle grinder, drill, screwdriver, wrench.

Stack is a six inch connector I cut up to connect to the back of the barrel, a 90 degree pipe, and two three-foot sections. Price: $40 for pipe from local Ace, plus a buck for the hardware, and a few bucks for stainless sheet metal screws from Lowes. Tools used: tin snips, angle grinder, drill, screwdriver.

Pan is a 20x30” flat bottom stainless welded three channel from Vermont Evaporator Company. Came with brass valve, needed only Teflon tape to install. Price: $270 on sale at an open house, normally $320.

Pre-heater is a half width steam pan. I used some 1 ¼ inch aluminum angle to hold it in place. I cut some short pieces to make brackets to pinch the evaporator pan to hold in place. The ball valve to let sap out is stainless and weldless. Price: $28 for pan from Amazon, $7 for angle aluminum from Lowes, $4 for stainless hardware from Lowes, $27 for valve from local brewers supply place. Tools used: angle grinder, drill with step drill bit, screw driver, wrench.

Total price = $544. Add in the previous failed barrel arch attempts and the cinder block evaporator I built the year before that… well a bunch more money.

Takeaways:

It took a few attempts, but I’m happy with what I built. It’s totally possible for other first-timers—I’m fairly handy, but haven’t ever really done any metal fabrication before this.

The barrel evaporator made by Vermont Evaporator Company is VERY nice. And although I initially thought the $900 price was steep, I no longer think that. I saw it in person, it’s very nice. It has a big door with a good sized air inlet. It has tall legs. It’s painted nicely. And it converts to a woodburning grill, how neat! Plus, the people who make and sell it are super nice and helpful.

If you can’t afford or don’t want to bother with a sugar shack for a permanent instillation for something like a Leader Half-Pint, I think either a homemade barrel stove or the Vermont Evaporator Company Sapling is a great option.

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Austin351
04-06-2018, 11:58 AM
One of the better barrel evaporators I've seen, nice work! You may consider adding another 4' of stack to help with draft since you are coming out of the barrel with a 90.

Rock Bottom Maple
07-13-2018, 04:12 PM
A grate for fire to sit on and a hole in bottom for ashes? More importantly hole lets in air.
You'll notice a hotter fire. Tractor supply has generic fire place grates.

themp
01-11-2019, 04:36 PM
Did you ramp up the fire bricks past the grate? Very nice build!

dblact38
01-11-2019, 09:06 PM
Wow looks great good luck with it welcome to the addiction

ajschnitzelbank
02-08-2019, 11:11 AM
A grate for fire to sit on and a hole in bottom for ashes? More importantly hole lets in air.
You'll notice a hotter fire. Tractor supply has generic fire place grates.

I do use a grate, but don't have a hole. Thinking about that now, thanks!

19372

ajschnitzelbank
02-08-2019, 11:12 AM
Did you ramp up the fire bricks past the grate? Very nice build!

No, because I don't have enough bricks. I did think about getting some more and doing that, perhaps I will this year.

ajschnitzelbank
02-08-2019, 11:12 AM
One of the better barrel evaporators I've seen, nice work! You may consider adding another 4' of stack to help with draft since you are coming out of the barrel with a 90.

This is a great idea, I think I will add four feet for better draft. Thanks!

Chickenman
02-08-2019, 01:01 PM
When I had one, I welded a plate to the back that went above the stove pipe opening. It looked like one of those file folder holders that mount on a wall only it was steel. It forced the draw from the top of the plate so I did not need to build a ramp. Its was a reverse ramp sort of. It allowed me to use longer pieces of wood to as the space inside was not shortened up. I dont have pics and that arch is loooooong gone.