Prill underfed stoker

Re: Prill underfed stoker

PostBy: LsFarm On: Wed Oct 28, 2009 10:37 am

Hello Steinke,

Have you installed and ducted your stoker furnace yet for this winter season?? I think you have already had snow !!

Greg L
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland

Re: Prill underfed stoker

PostBy: DOUG On: Wed Oct 28, 2009 11:25 am

Great find!!!
Stove/Furnace Model: CLAYTON 1600

Re: Prill underfed stoker

PostBy: steinkebunch On: Mon Nov 16, 2009 11:04 am

I have not ducted a return air system in yet - after much thought, it would just be too much nasty-looking ductwork that would take lots of work to cover up. I did fire it up though in the beginning of October, and have been burning ever since.

I have an open living design, and the return air flows down the half-height stairwell nicely. Place you hand at the top of the stairwell, and you feel hot air rushing upstairs. Sit lower near the steps, and you feel cold air rushing down to the stove.

I measured my stack temps yesterday. Once the stoker gets up and running, I have 550 degrees going up the stack. That is ridiculous. There just not enough "residence time" in these Prill furnaces, at least with the coal I'm burning. I turned my combustion air down some, but it did not help.

I have a Magic Heat reclaimer that I need to install to see if that helps. Local coal guy (Pease Feed and Coal) deals in them, and says he thinks you can get 30% more heat out of Prill and Stokermatics if you install one. I'll give it a shot when I get a chance. Just need to put a new fan motor on the one I have.

Stove/Furnace Make: Homemade Bituminous Hand-Fed
Stove/Furnace Model: Prill underfed stoker Model M8

Re: Prill underfed stoker

PostBy: charlie On: Mon Nov 16, 2009 12:04 pm

Certainly, anything called "Magic" should be accompanied by pictures!

Where do you measure your stack temp?
Stoker Coal Boiler: Prill 200 BF
Other Heating: Tulikivi TTU 2700

Re: Prill underfed stoker

PostBy: steinkebunch On: Mon Nov 16, 2009 3:02 pm

I'll get some photos when I get it hooked up. Might be a few weeks until I get time though. There are several other threads on the forum concerning Magic Heat reclaimers. Most with efficient stokers claim that they aren't too useful, as stack temps are already down to 200 degrees or so. But in my case, I may benefit from it.

I measure stack temp about 18" above the outlet, just below my barometric damper. I have a hole drilled in my double-wall smoke pipe for a draft gauge insert, so I just insert a salvaged barbecue thermometer in it. The thermometer appears to be accurate at room temperature, so I'm just assuming it's accurate at higher temps too. Could be off some :?:

Hard to stomach sending so much heat up the stack! I think I just still have too high of feed rate. Right now I have a 1-3/4" pulley on the motor, and a 7" pulley on the gearbox. In the next week, I hope to build a 1.5" pulley (can't find one off the shelf with a 5/8" arbor) and buy an 8" gearbox pulley. This should give me 75% of the current feed rate. If the Magic Heat can pull about 25% more heat out, maybe I can keep about the same BTUs using 25% less coal. I'd love to bucket 1/4 fewer buckets into the house! But then my wife would probably just turn the t-stat up. :cry:

Then next season, when I run out of Grass Creek coal (bit. coal), and switch to PRB coal (sub-bit.), I'll probably find everything changed... Right now I have a mound of pulleys laying under the gearbox, trying to get the right feedrate. They just don't make a 5/8" bore variable speed adjustable pulley that goes small enough.

I'll keep you posted.

Stove/Furnace Make: Homemade Bituminous Hand-Fed
Stove/Furnace Model: Prill underfed stoker Model M8

Re: Prill underfed stoker

PostBy: markc On: Sat Nov 28, 2009 10:39 am

great looking stove and good price, that is a wil-burt transmisson and you can still order parts direct from wil-burt also augers ,that thing looks like someone was just to lazy to put coal in it, you probaly will be able to use it for at least a good 10-15 years
Stove/Furnace Make: coalman,coal, biomass, pellets
Stove/Furnace Model: 400,000 btu, soft coal stoker

Re: Prill underfed stoker

PostBy: wyowa On: Thu Dec 24, 2009 9:38 pm

After looking at your pics I can see that your ring and pot look identical to my hardin. Just had some one from another site tell me the maerton stoker is also identical to the hardin. Really have to call them or go up on a holiday.Also the tranny seems the same ,just oriented different. Nice unit you have.
Stove/Furnace Make: Hardin
Stove/Furnace Model: Automatic Coal Furnace/ stoker

Re: Prill underfed stoker

PostBy: TC1956 On: Fri Sep 30, 2011 7:26 pm

Even though Prills is no longer in production there is someone in Sheridan Wy . That used to work for Prills . He opened his own business, name of it is Grumpy T's. Prill furnaces are his speciality. # is 307-683-6205
Stove/Furnace Make: prills 100

Re: Prill underfed stoker

PostBy: tracyprill On: Tue Dec 31, 2013 12:48 pm

I know this is an old post but what a great find. My grandfather was Leroy Prill, one of the designers and owners of PMC, along with his brother. I have heard that there is alot of desire for the old furnaces with some new upgrades. I remember growing up at the plant and my grandpa's shop, Prill Bros., heating, air conditioning and roofing. Good times!