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Author Topic: Biggest concerns for Gasification boiler build  (Read 27721 times)

renoman

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Re: Biggest concerns for Gasification boiler build
« Reply #30 on: January 26, 2014, 10:09:52 PM »



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renoman

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Re: Biggest concerns for Gasification boiler build
« Reply #31 on: January 26, 2014, 10:12:42 PM »
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binfordw

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Re: Biggest concerns for Gasification boiler build
« Reply #32 on: January 27, 2014, 12:33:59 AM »
Nice pics, thanks for sharing.

So the square tubes are your air for the burn box and the secondary chamber right?

How is your secondary chamber laid out?  Is it open, or does it route gases to the front and then back using firebrick to separate the space?

Is your nozzle at the back of the burn box?
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hondaracer2oo4

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Re: Biggest concerns for Gasification boiler build
« Reply #33 on: January 27, 2014, 08:34:24 AM »
Looking good, keep the pics coming!
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renoman

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Re: Biggest concerns for Gasification boiler build
« Reply #34 on: January 27, 2014, 08:01:46 PM »
yes the squares tubes are the primary and secondary air feeds. The primary feeds up over the top of the fire and the secondary branches out to both sides, down the walls to feed in under the firebrick where at that point I cut a hollow in the brick with four veins to feed out at the slot.  The slot is in the middle of the firebox which seems to work very well for even burns in the firebox.
The secondary is mainly open except that I had to put a wall down the center with bricks to support the ceiling layer. this also seems to work well to spread the heat and the ash tends to move to the front and build there before filling the back end. All in all the performance of it seems to be virtually troublefree but I don't have experience with any others either.
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mlappin

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Re: Biggest concerns for Gasification boiler build
« Reply #35 on: January 27, 2014, 10:10:10 PM »
Renoman, did you place a layer of steel in the bottom of your firebox over the refractory brick like jackal440 did on his or is your wood in direct contact with the top of the secondary burn chamber? I've been debating this, have even thought about using a double layer on top of the secondary and just letting the wood in the primary rest right on it to help with heat transfer. My thinking is the coals will help to retain heat in the secondary to allow quicker gasification? Also if damage was to occur from wood hitting the brick or cleaning it'd be a lot easier to change the top layer out than any of that actually involved in the secondary chamber.
« Last Edit: January 27, 2014, 10:16:23 PM by mlappin »
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renoman

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Re: Biggest concerns for Gasification boiler build
« Reply #36 on: January 28, 2014, 04:29:40 PM »
yes there is a steel bottom in the primary burn with the slot cut in in a little larger than what I made with the
brick and the high heat mortar. 2 layers of 2" thick brick on top of the steel on primary side and one layer 2"
brick on the under side of the steel forming the firebrick top of the secondary. So far no deterioration in any of the brick that
I have noticed.
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