BOOM! How to turn your stove into small bomb! LOL!

Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: SMITTY On: Mon Mar 22, 2010 10:47 am

Well, I had to revive this old thread ...... because I THOUGHT I had the biggest explosion in history when I started this thread ...... until last night! :shock: :jawdrop: :blowup:

The stove had been out for 2 days, & there may have been some chunks of bitty still floating around in there. So I fire it up last night, left the door open for a while, piled it on & closed the door. About a half hour later I told the wife to check on it ...... she says it looks like it went out. So I told her to open the ash door. Well, she let the ashpan area get real bright, then made the mistake of closing the ash door with the loading door shut.

BAM!!! I felt the house shake on that one! Wife screamed, so I asked if she's ok .... and she was. So I go down there in the fog of ash. I opened the loading door & another large explosion happened! :shock: WOW! Never had one quite that powerful before!

My glass is cracked COMPLETELY IN HALF!!! The mortar I put around the connector pipe where it meets the chimney is all cracked & loose, as is the pipe for the boiler. The new baro on the boiler pipe is no longer level. I swear the baro flap got bent slightly backwards, as it no longer sits flush when there's low draft. That was a biggun to be sure!!! :lol: I have no screws in the pipe where it meets the stove & it didn't even move, as expected. It's wedged in pretty good -- & that was the ultimate test!

Fire is burning bright right now. I overlapped the 2 halves of the glass. Not pretty, but will get me through the next few weeks until the weather gets more stable. Next season I'll either replace it or caulk it, depending on the finances.
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: rockwood On: Mon Mar 22, 2010 2:09 pm

SMITTY wrote:piled it on & closed the door

With soft coal? If so what size?
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
Hand Fed Coal Stove: Rockwood Stoveworks Circulator
Baseburners & Antiques: Malleable/Monarch Range
Coal Size/Type: Soft coal: Lump and stoker (slack coal)

Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: CapeCoaler On: Mon Mar 22, 2010 3:19 pm

A nice piece of steel can replace that glass...
CapeCoaler
 
Stoker Coal Boiler: want AA130
Hand Fed Coal Stove: DS Machine BS#4, Harman MKII, Hitzer 503,...
Coal Size/Type: Pea/Nut/Stove


Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: djackman On: Mon Mar 22, 2010 4:52 pm

Sounds like you're learning from me! After last year's "firing range" thought I had mine pretty well figured out. One small boom in the fall, then a big one early march when I got greedy on loading.

Neighbor asked me the next day if I'd bought a new shotgun or something. :D
djackman
 
Stove/Furnace Make: 1980 vintage Tarm
Stove/Furnace Model: FT22 (aka 202) installed!

Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: Rob R. On: Mon Mar 22, 2010 8:14 pm

This seems to be more of a problem in the fall & spring, when weather conditions result in poor chimney draft. I had some serious puff-backs in my Hitzer stove, but did not have any (knock, knock) this winter with my boiler. I attribute my explosion free burning to a strong chimney, and always leaving a few burning coals exposed when reloading.

:idea: Smitty, you might want to pull the pipe off your oil boiler and make sure you didn't get any flyash blown back into the heat exchanger. Also, since you are using a "combo chimney"...the next time you get ready to light the stove, try running the oil boiler for a while to warm the flue. My last house had a big flue, and it was tough to get the draft started in mild weather. 10-15 minutes with the oil boiler always did the trick ;)
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: BOOM! How to turn your stove into small bomb! LOL!

PostBy: SMITTY On: Mon Mar 22, 2010 11:34 pm

Here's a pic of the glass. It seems the larger glass found on the Mark II & III stoves lends itself to being heavily stressed in the center during a blast, due to the lack of insulation above & below to allow for secondary airflow. Now that my glass is in half, I can move both sections almost a 1/2" fore an aft. It's now clear this could have been prevented by 2 things:

    #1. Don't let wife touch the stove.
    #2. Place 1" long strips of insulation at the top & bottom center of glass for support


She didn't listen to me & closed the ash door with the loading door shut with no visible flame ..... and some unburnt leftover bitty sitting in there somewhere. Big no no's. I ALWAYS close the ash door FIRST, then close the loading door AFTER I blow on the coal pile & make the blue flames ignite ... I've never caused an explosion since I started this ritual.

rockwood wrote:
SMITTY wrote:piled it on & closed the door

With soft coal? If so what size?

The soft coal was burned up the night before & buried in anthracite. When the fire was out & banked it so I could fill in the void with charcoal to relight ... and I noticed a few smaller chunks of half burnt bitty in there ... just enough to cause major gas buildup. Then add low draft like everyone pointed out & a wife that wont listen to me, & you have a large blast. :roll:
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SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler