Anybody Using Hawken or Global Hydronics HE-4000?

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LsFarm
Member
Posts: 7384
Joined: Sun. Nov. 20, 2005 8:02 pm
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland
Location: Michigan

Post Sun. May. 18, 2008 7:14 pm

Hi KTMdude, read this thread: Minor Explosion in Coal Stove

If you add a lot of fresh coal on a smoldering fire, with no open flame to burn off the volitiles, you will probably get a minor explosion.. with a really big firebox it could be more than 'minor' I blew the flue pipes off my 'Big Bertha' boiler from one of these 'minor' explosions..

I assume you put the fresh coal over a layer of redhot wood coals??

Greg L

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KTMDude
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Posts: 10
Joined: Mon. May. 12, 2008 10:25 am
Stove/Furnace Make: Hawken Engergy HE-4000

Post Sun. May. 18, 2008 7:18 pm

Yup, fresh coal over some hot wood embers.

I cant believe it takes 200 lbs to cover the bottom! How much for your big bertha?


User avatar
LsFarm
Member
Posts: 7384
Joined: Sun. Nov. 20, 2005 8:02 pm
Stoker Coal Boiler: Axeman Anderson 260
Hand Fed Coal Boiler: Self-built 'Big Bertha' SS Boiler
Baseburners & Antiques: Keystone 11, Art Garland
Location: Michigan

Post Sun. May. 18, 2008 7:29 pm

My reduced firebox would be about 16-18" deep with 150-200# of coal. A layer of coal only 2" deep won't burn very well, a minimum depth of about 6" is needed to get anthracite to burn well. A fire about as deep as it is wide works best. Without a firebox reducer in your boiler, it will require a lot of coal to have a 6" or better 10" deep fire.

Let us know how it burns..

Greg L

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