As I mentioned before when I did my rocket grill project, I wanted to find a way to take wood gas from the rocket stove and channel it to the side burner. Here’s some work I’ve done, though there is a lot more to do to get it working:
We see from the video that it is indeed possible to collect some wood gas from the rocket stove for combustion elsewhere. With some improvements, more gas should be able to be drawn off, certainly enough for a sustained combustion.
This has got me thinking about using a rocket stove to build a wood gasifier. Note the way the gasification grate is made. Here’s a video on how I built it for reference:
What would happen if we put a simple butterfly valve at the top of the heat riser. Start the stove as normal with the valve open. In a minute or two when gasification begins, the intake of a small engine is connected to the air intake of the grate (with the appropriate coolers and filters). As the engine is turned over, the butterfly valve is shut and the uncombusted wood gases are drawn through the air injection holes of the grate. From there, they pass through the coal bed, get cracked further, are cooled and filtered, and finally fed to the engine for combustion.
I see such a system as having a great potential for a small wood gas system. Wood can be added to the fire with no smoke production, start up times should be very fast, and construction is very easy.
It is a rough idea, but one I plan to develop as time allows. Let me know what you guys think in the comment section of the first video in this post. This would make a great open source project.