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Anonymous Poster #1

Combustion Inside a Kiln

05/11/2012 9:42 AM

Hi, am currently working on a kiln project and iv noticed that a lot of coal fines remain unburnt in certain areas of the kiln. How can I solve this problem?
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Doorman
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#1

Re: Combustion Inside a Kiln

05/11/2012 10:28 AM

Reduce the amount of coal fines in initial charge.

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MagicWand
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#2

Re: Combustion Inside a Kiln

05/11/2012 1:05 PM

Kilns run at a temperature high enough to combust coal, so you know that there is sufficient heat.

So you have heat and fuel (coal), but no combustion. Hmmmm. What's missing?

Let me ask the Wizard of Oz.

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BDThompson
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#3
In reply to #2

Re: Combustion Inside a Kiln

05/11/2012 1:42 PM

Is that the Wizard of Oz, or the Wizard of O2?
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Steve of the North
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#4
In reply to #2

Re: Combustion Inside a Kiln

05/11/2012 3:44 PM
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wilmot
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#5

Re: Combustion Inside a Kiln

05/12/2012 11:57 AM

Combusting the carburetted coal fines upstream of the kiln might help reduce the accumulation of coal fines inside the kiln. Highly turbulent mixing followed by a divergent nozzle and a combustion chamber would supply hot air to the kiln and reduce the accumulation of uncombusted coal fines.

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davlamb
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Join Date: Feb 2007
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#6

Re: Combustion Inside a Kiln

05/13/2012 6:40 PM

We need more information on the kiln and the operation. Are you sure it is coal fines or could it be soot?
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PWSlack
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#7
In reply to #6

Re: Combustion Inside a Kiln

05/14/2012 11:22 AM

What is soot other than coal fines?

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davlamb
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#8
In reply to #7

Re: Combustion Inside a Kiln

05/14/2012 1:58 PM

Not to get too specific, I have seen soot build up in areas of stagnation if you are burning a coal with a high volitile content with low amounts of excess oxygen.
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durtieduck
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#9

Re: Combustion Inside a Kiln

05/17/2012 2:55 AM

hydrocarbons need oxygen to combust. check the air flow '[draft].
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Users who posted comments:

BDThompson (1); davlamb (2); Doorman (1); durtieduck (1); MagicWand (1); PWSlack (1); Steve of the North (1); wilmot (1)

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