Furnace Technology
The advantages of firing pulverised coal in the furnace lies in the fact that, it

Accelerates the burning rate and economises on fuel consumption
Permits the use of high ash content coal
All of these
Permits the use of low fusion point ash coal

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Furnace Technology
In practical operation of any furnace, zero oxygen percentage or theoretical CO₂ percentage in flue gas is rarely achieved, because of

Use of non-preheated combustion air
Use of excessive positive draft in the furnace
Imperfect mixing of fuel & air and infiltration of air
Use of pulverised solid fuels

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