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Posted by Dick Bishop on June 03, 2003 at 16:21:48:
In Reply to: clinkering on a stoker grate wood-fired boiler posted by Francois Le Sieur on September 18, 2002 at 22:05:27:
: I operate a vu-40 combustion engineering boiler. we burn bark between 40-65% of humidity. There's big clinker forming on a zone of the grate and i don't know why. First i was thinking that is the cinders reinjection in the furnace by steam nozzles, it's seem like an other thing. Can you help me? Excuse my english im a french
We had a simmilar problem burnning coal in a combustion engineering boiler with a chain grate stoker the damper openings for the zones opened at a 45degree opening to allow the forced draft in to the zone, however this directed the air to the center of the grate and on each side where the air was not directed the fuel did not burn and formed clinkers. we had to raise the forced draft air pressure and only crack the damper to pressurize the zone equally. This might be something you can try, iy will only take a few minuets to see the change in the fire.
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