EFM Bituminous Boiler Testing Is Next Week

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Klinker Mine
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Post by Klinker Mine » Thu. May. 15, 2008 8:01 am

Is it an underfeed firepot, with a refractory ledge around the perimeter of the firepot where the clinkers collect for your manual removal??
Exactly. I will get some pictures when I get things cleared out back there. As spring is finally here (although is has snowed twice this week) I am in the middle of moving everything in the shop :roll:
No ashpan, as it all fuses together. You learn stove maintenance real quick. Before I had my own business, I was a pipe fitter and worked a lot in coal fired power plants. Got to watch thousands of rounds from the Klinker gun shooting off the sidewalls and roof. Seen one just a little smaller than a volkswagen bug. It was wound up in the steam pipes on the roof. We had already put up 5 layers of scaffold. it wadded them like wet paper. :D I still have a bunch of the rounds somewhere. I will snap some pics.
Gary


 
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coaledsweat
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Post by coaledsweat » Thu. May. 15, 2008 5:26 pm

Klinker Mine wrote:Got to watch thousands of rounds from the Klinker gun shooting off the sidewalls and roof. Seen one just a little smaller than a volkswagen bug. It was wound up in the steam pipes on the roof. We had already put up 5 layers of scaffold. it wadded them like wet paper. :D I still have a bunch of the rounds somewhere. I will snap some pics.
Gary, we really need to see the video on this.

 
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stoker-man
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Post by stoker-man » Mon. May. 19, 2008 7:41 am

Update: The coal has been delivered from Wyoming; the experimental stoker has been installed into a 520; and we are awaiting a larger coal tube and worm. The reason being that stoker coal in Wyoming is not one size, but three sizes mixed together.

 
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Richard S.
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Post by Richard S. » Mon. May. 19, 2008 8:06 am

The plot thickens....

 
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stoker-man
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Post by stoker-man » Mon. May. 19, 2008 11:11 am

....and moves along as quickly as the "Lost" series.

 
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charlie
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Post by charlie » Wed. May. 21, 2008 9:26 pm

I can't believe my good fortune... searching the web to replace that old Prill boiler and stumbling across this forum! Very exciting. I've been planning on replacing my boiler for awhile, though I must admit I get more ambitious just after I have to work on it. Seems to always die during a snow storm.

I burn bit, live in Wyoming, have clinkers, can't wait for the efm test! Also, am a miner. Looking forward to more posts!

 
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Sting
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Post by Sting » Wed. May. 21, 2008 9:39 pm

HI Charlie

Would love to see pictures of what you do!

Kind Regards
Sting


 
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stoker-man
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Post by stoker-man » Thu. May. 29, 2008 2:25 pm

Update:

Testing began this week. The specially sized coal pipe and auger turned out to be too large. There was too much coal being added to the fire. It will be next week until a smaller pipe and auger can be made. The firing test went very well otherwise. The final unit will be a bin fed unit, but possibly there will also be a hopper fed unit also available.

 
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Sting
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Post by Sting » Thu. May. 29, 2008 4:22 pm

stoker-man wrote:Update:

Testing began this week. The specially sized coal pipe and auger turned out to be too large. There was too much coal being added to the fire. It will be next week until a smaller pipe and auger can be made. The firing test went very well otherwise. The final unit will be a bin fed unit, but possibly there will also be a hopper fed unit also available.
Too Large????

hummm - you may have noted my iron fireman in the for sale area -- larger than life, it used to fire at least 750k in -- but I had a dream I could SIGNIFICANTLY reduce the screw speed and fire at about 20%

But your result tells me no???? :cry:

 
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Richard S.
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Post by Richard S. » Thu. May. 29, 2008 4:36 pm

I believe the EFM's are the same as my Van Wert, there is only one motor that runs both the auger and the cumbustion air. The auger size would significantly impact the amount of coal to air ratio and the length of burn. e.g if there is demand for heat and the auger is too big it would be pushing a lot of coal and probably eventually push the fire out of the pot entirely.

 
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stoker-man
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Post by stoker-man » Thu. May. 29, 2008 7:17 pm

I guess the worm was slowed as much as it could be, but the volume was just too much. The burn was very good up till that point.

 
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Sting
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Post by Sting » Thu. May. 29, 2008 10:43 pm

ok --- maybe this is another oversimplification of a complicated problem ---- but not all motors spin at 1750 rpm

So why not use one that turns slower - and belt for increased speed on the combustion fan :?:

 
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cArNaGe
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Post by cArNaGe » Thu. May. 29, 2008 10:51 pm

Sting wrote:ok --- maybe this is another oversimplification of a complicated problem ---- but not all motors spin at 1750 rpm

So why not use one that turns slower - and belt for increased speed on the combustion fan :?:
There is no belt on an EFM. The motor shaft goes through the fan and bolts to the gearbox.

 
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Scottscoaled
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Post by Scottscoaled » Thu. May. 29, 2008 10:56 pm

Can't use a Dimmer switch to find out if it will work? The fan motor only uses about 300 watts. It isn't good for long term but it will slow the feed down enough to find out if your design works. :) Scott

 
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Richard S.
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Post by Richard S. » Fri. May. 30, 2008 4:40 am

I don't know about the EFM's but you could do that with mine, when stoker man first posted the pictures I was quite suprised how close they are. Mine has a right angle off the back of the stoker. Little bit more complicated.

Here's brief explanation because I know this picture is terrible, not a lot of light and its from my video cam which doesn't take very good pictures. Anyhow... The motor belt goes to a pulley on the transmission which is not very visible. The transmission directly drives the combustion fan to the left. It also drives the auger which are the front two chainwheels, you'd ahave to change one of these to lower or speed it up. It also drives the "thingy" sticking up that rotates around the fire pot, thats the chain in the background.

Other than the right angle they are almost identical to the EFM's.

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