Advantages:

1. The pulverizing mill grinds the coal at a steady rate irrespective of boiler feed.

2. There is always some coal in reserve. Thus any occasional breakdown in the coal supply will not affect the coal feed to the burner.

3. For a given boiler capacity pulverising mill of small capacity will be required as compared to unit system.

Disadvantages

1. The initial cost of the system is high

2. Coal transport system is quite complicated

3. The system requires more space.