AHS S130 Coalgun- Puffbacks & Explosions

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
User avatar
McGiever
Member
Posts: 6009
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Tue. Nov. 29, 2011 3:17 pm

dchartt wrote: My draft on a normal day is around .01, .02 if im lucky,.....lots of condensation inside my hopper because boiler is in barn.
The condensation is due to the poor draft...and more noticeable due to the colder location.
If draft is corrected the condensation would go away.
SLOW AND STEADY WINS THE RACE

Visit Alternate Heating Sytems

User avatar
lsayre
Member
Posts: 12265
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Tue. Nov. 29, 2011 5:45 pm

watkinsdr wrote:BTW: Have you S130 folks complained to AHS about your unburned coal problem yet?
I mentioned it to them, and the hope is that things will improve with the coming of the colder weather. Time will tell.

Did your S130 get any better in this regard when the consistent cold weather finally arrived last year?
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

User avatar
watkinsdr
Member
Posts: 242
Joined: Sat. Mar. 24, 2007 8:14 pm
Stoker Coal Boiler: AHS S260 Boiler
Location: Kensington, New Hampshire

Post Tue. Nov. 29, 2011 8:07 pm

Hey Larry:

I installed my S130 the first weekend in April last spring; so, she never really saw really cold weather and consistent hard burning. I always had significant unburned coal in the S130's ash pan and never resolved the problem. The S260 however burns the crap out of coal. I've never had unburned coal in the S260's ashpan; even under light load, go figure... And that's the reason why I originally went with the S130; versus, the S260! I thought the S260 would have unburned coal in the ashpan under light load!!
AHS S260 "BEAST" Burning Lehigh Pea Anthracite
Kensington, NH

rychw
Member
Posts: 92
Joined: Wed. Jan. 30, 2008 2:23 pm
Stoker Coal Boiler: AHS 130
Coal Size/Type: Pea
Stove/Furnace Make: AHS
Stove/Furnace Model: 130
Location: Sykesville, MD

Post Wed. Nov. 30, 2011 11:10 pm

Now that I've lowered the dump temp to 110 the boiler seams happier and there have been no booms. I need to watch the boiler but I see an inprovement. I'll let you know how things progress, One day at a time. :?:

dchartt
Member
Posts: 172
Joined: Fri. Sep. 02, 2011 5:22 pm
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Post Sat. Dec. 10, 2011 10:10 am

has anyone ever thought the whole "cyclone funnel" could be a problem? why did ahs choke the flue pipe down so much with the funnel?

User avatar
coaledsweat
Site Moderator
Posts: 9827
Joined: Fri. Oct. 27, 2006 2:05 pm
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea
Location: Guilford, Connecticut

Post Sat. Dec. 10, 2011 11:50 am

dchartt wrote:has anyone ever thought the whole "cyclone funnel" could be a problem? why did ahs choke the flue pipe down so much with the funnel?
The funnel isn't part of the exhaust path, it's where the flyash is rejected to.
Nothing is impossible for people who don't have to do it themselves.

User avatar
Pa papa
Member
Posts: 85
Joined: Thu. Oct. 29, 2009 7:38 pm
Stoker Coal Boiler: AHS-130
Coal Size/Type: Pea; anthracite
Other Heating: oil fired boiler; LP insert
Location: Summerville,PA

Post Sat. Dec. 10, 2011 12:33 pm

Here's a pix. Your flue pipe is connected to a 5" tube that goes inside and several inches below the port opening in the sidewall.
Attachments
Exaust & seperator.JPG

User avatar
Yanche
Member
Posts: 3032
Joined: Fri. Dec. 23, 2005 12:45 pm
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea
Location: Sykesville, Maryland

Post Sat. Dec. 10, 2011 8:54 pm

Pa papa wrote:Here's a pix. Your flue pipe is connected to a 5" tube that goes inside and several inches below the port opening in the sidewall.
What I find with my AHS cyclone is the bottom of the cyclone clogs frequently. It appears the exit hole is to close the the ash grate and bottom ash that is sitting on the grate prevents the cyclone fly ash from falling. I use a long piece of flexible stainless rod to periodically ream it out. The rod is a old CB antenna, which I insert through and access hole drilled into my stovepipe. When I do ream it, I will see a trail of the darker fly ash in my ash bin after a couple of grate cycles.
Yanche
Alternate Heating Systems S-130
Stoker Boiler burning Anthracite Pea Coal

Visit Alternate Heating Sytems

User avatar
Yanche
Member
Posts: 3032
Joined: Fri. Dec. 23, 2005 12:45 pm
Stoker Coal Boiler: Alternate Heating Systems S-130
Coal Size/Type: Anthracite Pea
Location: Sykesville, Maryland

Post Sat. Dec. 10, 2011 9:17 pm

I'm continuing to think of ways to solve he puff back problem. I believe the consensus is that it occurs on combustion fan shut down. I'm not currently having problems but have in the past. I do find fly ash on the lower arc of the inspection door pipe, i.e. the bottom edge of what the flapper door seals against. This means there had to be a reversal of air flow to put it there. Some air, or the suction effect of the opening swinging inspection port door put it there. Or perhaps a very slight puff back, blowing fly ash out the inspection port.

There was a suggestion that a variable speed blower motor could be programmed to slowly transition to off. This would in theory continuously pull the combustion mix through the boiler tubes, even after the flapper door opened. Perhaps the existing motor could be used as a two speed motor. Suppose upon shutdown the dual voltage motor windings were put it series, just like you would if you were to wire it for 220 VAC, but instead powered it with 110 VAC. It would run much slower, but it likely would still run, especially since it had just been up to speed. Now hopefully the flapper door would slowly open and the lower induced draft would continue exhausting the combustion gases. Then after some time power would be completely turned off. Time delays could be controlled by an electric furnace control sequencer. What do you think?
Yanche
Alternate Heating Systems S-130
Stoker Boiler burning Anthracite Pea Coal

User avatar
McGiever
Member
Posts: 6009
Joined: Sun. May. 02, 2010 11:26 pm
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Coal Size/Type: PEA / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek
Location: Junction of PA-OH-WV

Post Sat. Dec. 10, 2011 10:50 pm

Yanche wrote: What do you think?
Sounds like it could work, maybe?

Finding the threshold point that the flapper door would release open is the biggest "unknown".
May be a hard mark to hit by the mentioned approach...only way to find out is to give it try. ;)
SLOW AND STEADY WINS THE RACE

User avatar
lsayre
Member
Posts: 12265
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Sun. Dec. 11, 2011 7:10 am

Could coal that has been mildly oiled to reduce dusting have any relevance to puff-backs?
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

User avatar
whistlenut
Member
Posts: 3549
Joined: Sat. Mar. 17, 2007 6:29 pm
Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ & V-Wert
Hand Fed Coal Boiler: Franks,Itasca 415,Jensen, NYer 130,Van Wert
Hot Air Coal Stoker Furnace: Alaska, EFM, Keystoker, Yellow Flame
Hot Air Coal Stoker Stove: Alaska, Keystoker-2,Leisure Line
Hand Fed Coal Stove: Alaska, Gibraltar, Keystone,Vc Vigilant 2
Hand Fed Coal Furnace: Ford, Jensen, NYer, Van Wert,
Baseburners & Antiques: Glenwoods
Coal Size/Type: Barley, Buck, Rice ,Nut, Stove
Other Heating: Oil HWBB
Location: Central NH, Concord area

Post Sun. Dec. 11, 2011 7:24 am

Oil is NOT an issue on the coal. Ashing, draft, level of new coal in the burn chamber. The observation door is to be left floating, not tightened to any particular tolerance. This is NOT an air tight device. Keep flogging the poor horse, though...... :idea:
"Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a 'piece of human solid waste' by the clean end." More true today....

dchartt
Member
Posts: 172
Joined: Fri. Sep. 02, 2011 5:22 pm
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Post Sun. Dec. 11, 2011 7:53 am

sure would be NICE if AHS actually had two cents in all of this and backed their product up and maybe came up with some sort of recall and a way to fix

User avatar
lsayre
Member
Posts: 12265
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Blaschak Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW)
Location: N/E Ohio, between Medina and Wadsworth

Post Sun. Dec. 11, 2011 8:34 am

I carried this relevant quote over from a different thread:
Beeman wrote:Final Report on this mini-puffback issue. I think my coal dealer Vern identified the source of the problem when he and I had a lengthy chat this summer while he was delivering 4 tons of Superior nut. This is the same coal size and source as last winter when I had the puffing issue. His commented that he thought the problem was from too much oil (about 1.5 gallons/ton) and said he heard from other customers with similar complaints. I concluded last summer that I would wait to see how the new coal burned now that he said he was adding only 1 gallon or less of oil/ton.

I am happy to report absolutely no puffing from this year's coal. I am forced to conclude--happily--that Vern was correct. Anyone else who ever has this mini-puffback problem should move possibly too much oil on the coal to the top of the list of probable causes.

Wishing everyone safe and steady burns!
-Larry

Democracy rests upon the principle that collective wisdom arises from a pool of individual ignorance. A Republic rests squarely upon objective law, and fundamentally upon those laws which restrict the scope and actions of government.

User avatar
coaledsweat
Site Moderator
Posts: 9827
Joined: Fri. Oct. 27, 2006 2:05 pm
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea
Location: Guilford, Connecticut

Post Sun. Dec. 11, 2011 8:43 am

dchartt wrote:sure would be NICE if AHS actually had two cents in all of this and backed their product up and maybe came up with some sort of recall and a way to fix
They can't fix what their customer does with their product. Puffbacks are not an AHS exclusive, any coal appliance can have them when operated out of their sweet spot, there are more than enough threads in this forum to prove that.
Nothing is impossible for people who don't have to do it themselves.

Visit Alternate Heating Sytems

Post Reply

Return to “Stoker Coal Boilers Using Anthracite (Hydronic and Steam)”