New Boiler Build for New Steam System.

Heh, something to mull over. I'd rather have an Axeman Anderson, but...

If I could have got a locally made underfeed stoker I would have......just for the local jobs factor alone

my new stoker....it looks huge in this shot compared to the welder because i'm standing on the bench so I can get the camera far enough away from it to get it all in frame....use my boot for referance
inlet end
Business end
the tuyere....the hole is 4"x6"
underside of tuyere

the hot end with the tuyere removed
The main body is a 2 piece casting that is bolted together with a felt type gasket to seal it
the fan and sitting under it is the lower hopper gasket
the double gearbox setup with the feed screw's drive plate
feed screw showing the drive dogs that fit into the plate shown in the previous picture.....the screw is 3.75"/95mm (approx) in diameter
the Burner end of the screw....the reverse twist forces the coal to go up into the tuyere
gearbox's view....note that the feed tube is trough shaped rather than round.

Thats enough pics to let people know that my new toy looks like....plus I don't any many more that are worth posting up

The stoker drive motor is 90W and the fan is 75W so the total power draw looks like it will be pretty minimal.

Now I have to decide if I want to make a nice simple boiler or one with automatic ash removal and everything.....

Oh out of curiosity how much head room do most underfeed boilers have between the top of the firepot and the roof of the firebox?....my stoker stove has 18" and on high fire the flames touch the top of the stove.....i thought with the new stoker being a bit bigger in capacity, I will have to make the flames 'headroom' a bit higher so the flames won't touch the roof of the firebox.....any thoughts?

Callum

I noticed the company that made your stoker also makes a deflector plate designed to hang over the burner. its a circle of steel with a hook on the back

Callum

Thats impressive , very robust. I would have never expected to see a cast auger. Do you expect that the cast will wear better than a stainless? You might want to have that copied locally and save the original..... How much US do you have tied up in that beasty?

confedsailor wrote:I noticed the company that made your stoker also makes a deflector plate designed to hang over the burner. its a circle of steel with a hook on the back

they are not steel they are cast refractory...i asked lol

waldo lemieux wrote:Callum

Thats impressive , very robust. I would have never expected to see a cast auger. Do you expect that the cast will wear better than a stainless? You might want to have that copied locally and save the original..... How much US do you have tied up in that beasty?

i'm getting the auger and the tuyere copied locally...i want to keep the originals as casting patterns.

i think the auger will wear better than a steel on would.....the cast iron parts that are exposed to moving coal in the stokers on your side of the pond seem to last forever....i know that the auger's are wear items but i'm more worried about the outboard end bearing/carrier for the auger....its a cast iron to cast iron wear surface

about US $1200.....half of which was the shipping and tax .....the poles thought its cast iron and weighs alot.... ....lets airfreight it!!!!.....and while we are at it, we will write the price on the invoice to include the freight as well so he will need to pay tax on all of it instead of just the purchase price .........

lol guess I shouldn't complain....i have a brand new stoker and I can't get anything like it locally

waiting for parts sux

Oh don't worry I'm sure the Kiwi will get there soon, or would they use sheep to deliver things?

That is a stout looking unit there! Lots of cast iron. I would worry about the cast auger though. All the cast iron bits in the PA made stokers that I have seen are in the fire box where it is hot and dry. Coal at room temp and a little dampness may give you some problems. Good thing you are getting spares made.

You might be able to adapt a stainless auger if needed.

-Don

confedsailor wrote:Oh don't worry I'm sure the Kiwi will get there soon, or would they use sheep to deliver things?

naa... me stuff seems to have been sent by snail this time

StokerDon wrote:That is a stout looking unit there! Lots of cast iron. I would worry about the cast auger though. All the cast iron bits in the PA made stokers that I have seen are in the fire box where it is hot and dry. Coal at room temp and a little dampness may give you some problems. Good thing you are getting spares made.

You might be able to adapt a stainless auger if needed.

-Don

supposedly the cast iron that they have made it out of is some sort of rust resistant type......specifically because finer grades of coal tend to be damp

i figure that as long as it doesn't sit over summer with coal in it I won't have a problem......and I intend to run it year round

Just came across this post. Bought a similar model from Poland last year and modified my biasi boiler and slid unit under. Not using the hopper that came built a platform and using toter bins with a steel plates on the bottom that I pull out after lifting on the platform.
Burning bulk pea also works well with rice coal
Take a look

http://www.kotlyco.pl/produkt/_prod:d18

Thats awesome dperg.....what size is that one.....my one is 15 to 20KW depending on how good the coal is.

do you have anyway of controlling the auger speed?

I have been thinking about getting a pwm type motor controller to allow me to lower the fire rate in the summertime when it will only be heating the DHW....altho I should to get the whole system built and running first I guess before I go trying to fine tune it

Are you running Anthracite or Bituminous coal?

I intend to run my one on fines....if that isn't a success then I can get a rice/buckwheat size coal.....its supposed to be designed to run on fines which would be good....fines are $54 a ton at the mine I get my coal from