[Ruy Dias de Bivar]

***Who is the person watching the amperage on the Pulverizers?***

Pulverizer amps have nothing to do with it. When the coal feeder runs out of coal the feeder trips. Then the pulverizer trips on no ignitors at low loads.

The Primary hot air then backs up into the feeder and into the silo unless there is coal in the silo throat to stop it. No coal in the silo means the hot air can ignite the coal dust and....Kaboom.

It is the coal handler’s job to make sure there is coal in the silos.

[Little Bill]

Everyone that has operated a Coal Fired Boiler KNOWS that you have to balance the Amperage among the pulverizers in service, work in vs work out. The secondary air provides propulsion and a drying effect to the coal and provides O2 for a fire.

Nothing guarantees that the instrumention is going to work. I spent five years as an an I&C supervisor If it can fail it will. The reason you have an operator in the room is to make sure it does not happen.