norew
99 posts
TimePosted 25/08/2012 02:07:06
norew says

ALTERNATIVE FUEL

Hi everyone, What is the effect of using a wet rice hulls as alternative fuel on kiln bricks, coating, clinker quality and formation, power consumption, etc. As compared to using a predried rice hulls. Thank you. God bless

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Ted Krapkat
536 posts
TimePosted 27/08/2012 06:47:22

re ALTERNATIVE FUEL

Hello Norew,

 

Surely the wet rice husks would dry almost instantly in the heat of the kiln.

The only drawback I can see in using wet rice husks is the extra energy required to dry off the water, and possibly some handling/feeding issues with the wet material.

 

Regards,

Ted.

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norew
99 posts
TimePosted 04/09/2012 04:07:40
norew says

re ALTERNATIVE FUEL

Here in our plant, the set-up to fed for AFR(rice hull) is at the kiln inlet section rather than on the same as the burner entry. Do you see anything wrong with that?

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Ted Krapkat
536 posts
TimePosted 05/09/2012 04:15:39

re ALTERNATIVE FUEL

Hello Norew,

How are the wet rice husks fed into the kiln inlet and where are they added exactly?

If the point of addition is too close to the kiln inlet, one problem could be that the kiln gases at this point do not have enough oxygen to properly burn the rice husks. This could lead to reducing conditions in the kiln inlet and lower preheater, causing build-ups.

If you have to feed them into the kiln at the back end it would be best if you could feed them into the precalciner, where there is more control over the amount of tertiary air present and therefore likely to be sufficient oxygen available for complete combustion.

 

Regards,

Ted.

 

 

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