1 reply to this topic

[delixxxxi]

Good day,

 

Please guide me on how to solve this problem~ Thank you in advance for those who will answer~ God Bless You~

 

The stack gas from a boiler furnace contains 10.8 % CO₂, 0.2 % CO, 9.0 % O₂ and 80.0 % N₂.  These gases enter the stack at 400 ^oC; 500 kg of coal are burnt per hour.  The proximate analysis of the coal as fired is 1.44 % moisture, 34.61 % volatile mater, 57.77 % fixed carbon, and 6.18 % ash, and the heating value is 33.3 kJ/g.  An analysis for carbon and sulfur shows these to be 78.76 % and 0.78 % respectively.  Furthermore, it is known that coal from the same field averages 1.3 % N.  The volatile matter of the refuse (dry) is 4 % and fixed carbon 21 %.  Air in the boiler room has a temperature of 25 ^oC.

 

Calculate: % heat lost due to unburnt combustible in refuse

 

[breizh]

Hi ,

We don't do homework but we are happy to help . Submit your work and tell us your difficulties. For sure someone will help you .

Hope you understand.

Breizh 

Start with a mass /mol balance (exelsheet attached to a simple PFD ) .

 

Note:  

        https://www.ohio.edu.../Chapter11.html

Edited by breizh, 29 June 2020 - 01:49 AM.