Question

Explain the general layout of ash handling and dust collection systems

Answer 1

Boilers burning pulverized coal (PC) have bottom furnaces. The large ash particles are collected under the furnace in a water-filled ash hopper, Fly ash is collected in dust collectors with either an electrostatic precipitator or a baghouse. A PC boiler generates approximately 80% fly ash and 20% bottom ash. Ash must be collected and transported from various points of the plants as shown in figure. Pyrites, which are the rejects from the pulverizers, are disposed of with the bottom ash system. Three major factors should be considered for ash disposal systems.

 

Answer 2

ANSWER
......

1. THE BOILERS BURN COAL WHICH HAVE BOTTOM SURFACE

2. IN THIS THE LARGE ASH PARTICLES ARE COLLECTED