I make more work for myself because I can't leave well enough alone!
I hear you there.
europachris wrote:Berlin wrote:with that much soot buildup after 500lbs you need more air. There is also some coke in that clinker, more than you might think; to solve this you need more heat reflection on the fuelbed- this will also prevent soot buildup in the boiler. The key with a clinkering type stoker is to reflect as much heat into the fuelbed as you can - the more heat reflection the less air you'll need to achieve a reduction in coke and soot production and you'll get significantly more dense clinkers. This is why, although you did a great job with your setup, I was encouraging you to extend the base by another 10" or so and add some ceramic fiberboard.
You are absolutely correct, Dr. Berlin! With the added air from yesterday, the soot production turned into fly ash, and it did reduce the amount of coke and improved the clinker density. I am still looking for a source of ceramic board material that won't bankrupt me so I can hang a 12~14" diameter piece over the fire pot and possibly add a strip around the boiler above the firebrick.
I am also evaluating my options for extending the base height, partly due to your comments and experience, and also Coal Berner stating that the cleanout door should be larger. Another 6 to 8 inches on the base height along with moving the door up 4" or 5" and giving the other few inches to the door height would help. Mostly the door is to low once the fire bed has built up. If I was a hot-shot welder/fabricator I'd try to convert the round door to the square door style boiler (or just start looking for a square door boiler top - assuming it will fit my current base sized for the 350). Either way the boiler has to come off the base.....
My original intent was to keep the base as short as possible and keep the firepot as close to the bottom of the boiler as possible so the heat went into the boiler and not into the surrounding base (and into the garage). However, with the current base dimensions, I have enough room to fit a layer of ceramic blanket behind the firebrick.
LsFarm wrote:Chris, Berlin, what is the reported ash quantity of the coal you are burning??
Sounds like very low, like 2-5% ?