Co Boiler

I make amends.

CO gas are available in refineries as a by product of the catalyst regeneration process in fluid catalytic cracking (FCC) and residue cracking (RCC) units.

CO gas is utilised for steam production for three reasons, namely:

1.To recover the heat available in flue gases 2. To convert CO into CO2 before discharging the flue gases to atmosphere 3.To lower the gas temperature prior to catalyst fine recovery devices.

Depending upon the regeneration process two types of heat recovery (i.e. fired boiler and unfired waste heat boiler) are used.

The first solution is common when carbon deposits on catalyst are removed with low excess air. The flue gases are rich in carbon monoxide, should be converted to carbon dioxide before it is discharged to atmosphere.

CO boiler must take into consideration the three reasons mentioned above, i.e. recover the heat available, convert the CO to CO2 and cooling for fines recovery. These equipment are not only boilers but also incinerators where residence time at high temperature is the key factor for the proper CO oxidation.