Hey everyone;

 What is the length of the flame inside the kiln? how can we determine the length of the flame? i know that alot of factors affect the length of the flame like swirl, primary air pressure, ID fan and etc. but Is there any formula collect all these factors to determine the length of flame (Gas, Oil, & Coal)?!!

Best Regard

  

 

No, there is no formula that I know of. With thermal imaging cameras you can get a temperature reading along the axis of the kiln and see where the temperature falls to give you an estimate.

There are many book on combustion.
This book on rotary kiln might answer your questions:

Rotary Kilns: Transport Phenomena and Transport Processes by Akwasi A Boateng

Hey Gentlemen,

I read recently that the flame length can be calculated by this formula 5* Di (inner diameter of kiln). Is it correct? if the answer is yes, is it valid for all types of fuels like gas, coal, etc. ???

Saprina

 

no this is not correct.

 

Saprina, this is a general formula and can't be used at all to determine the length of flame, Try to read the questions in this forum about the flame, they may give you good information.

Good luck

Hey Saprina, this is a general formula and can't be used at all to determine the length of flame, Try to read the questions in this forum about the flame, they may give you good information.

 

The Flame length depends on much more factors such as amount and temperature of the klinker (heat adsorbance), of the type of fuel and secondary air temperature and amount.

You can indicate the flame length (and plum length) by using a thermographic camera beside the burner at the kiln head and you can measure the plum length and part of the flame by the new side thermography, beeing installed in the kiln head side.

If you are interested in more information, send me an email and I will send you an article about this new method of increasing quality and secondary fuel usage. 

Regards

alexander.hanf@powitec.de