FLY ASH

Pneumatic Vacuum Conveying System

Ash is conveyed pneumatically under negative pressure through specially designed valves and pipelines from Fly Ash Hoppers to Silo or to Intermediate Surge tank for Dry Ash Storage and removal in dry or semi-dry condition or to Wetting Unit / Collector tank / Hydraulic Exhauster for removal in wet slurry form directly to ash dump area or to slurry sump for onward slurry pumping to ash dump area.
Vacuum creating device options are:
· Mechanical Exhausters / Vacuum Pumps
· Hydraulic Exhausters :The exhauster water being in closed-loop or in open-loop configuration

Pneumatic Pressure Conveying System
Lean phase or Dense phase

Ash is conveyed pneumatically under positive pressure through feeder valves / Ash Transmitters and pipelines from Fly Ash Hoppers or Intermediate Surge tank to Silo for Dry Ash Storage and removal in dry or semi dry condition or to a Wetting Unit for removal in wet slurry form.

Combined Vacuum & Pressure Conveying System

Ash is first conveyed pneumatically under negative pressure through specially designed valves and pipeline from various Fly Ash Hoppers to central collection point passing through Dust Collector or Bag filter located near Electrostatic Precipitator in Intermediate Storage tank. Then Ash is further transported pneumatically under positive pressure through seperate valves and pipeline to a distant Silo for Dry Ash Storage or to a wetting unit for subsequent wet disposal in slurry form.

Fly Ash Storage in Silo and Dry / Semi-Dry Ash Disposal System

When Dry or Semi-dry Fly Ash collection and disposal is desired, Silos of RCC OR Steel construction collect the Ash from Conveying System either directly or through Dust Separator. Silos are provided with fluidising arrangement for easy discharge of Ash through the bottom outlets.
Ash Unloading System options from silo are :-
· Complete Dry Unloading into enclosed tankers / Wagons
· Semi-Dry unloading to open Trucks / Wagons
· Dry / Semi-Dry unloading to Belt Conveyor Systems
· Wet unloading through Feeder Ejectors for Ash disposal in slurry form.

Control Room for Fly Ash Handling System

Bag Filter Assembly

Telescopic Spout - Dry Ash
Unloader

Ash Storage Silo