BARH
BALANCE WORKS OF ASH HANDLING SYSTEM PACKAGE
SALIENT TECHNICAL FEATURES
1.ASH HANDLING SYSTEM
Ash Handling System shall consist of the following sub systems:
a)Bottom Ash Handling System
Jet pump and Water Impounded Hopper System – An intermittent system consisting of water impounded hoppers, clinker grinders, jet pumps etc.
b)Economiser and Air
Economiser ash and Air preheater ash is handled through wet system, using flushing apparatus and the slurry is led to the ash slurry trench, which gets connected to the combined ash slurry pump house.
c)Bottom Ash Hopper Overflow Water System
Over flow water from bottom ash hopper is to be reused in ash handling system. The system comprises of overflow tank, settling tank & surge tank, overflow water transfer pumps and sludge pumps shall be provided.
d)Fly Ash Handling System
i)Vacuum Conveying system
It shall consist of liquid ring vacuum pumps, material handling valves, cast iron pipes for dry ash conveying, instrument air compressors etc.
ii)Dry Fly Ash Transportation system
The system will consist of buffer hoppers, transport air compressors, CI / MS pipes, Structural steel silos, buffer hoppers & silo aeration blowers, dust conditioners, telescopic chutes, water pumps etc.
e)Combined Ash Slurry Disposal System
The bottom ash and fly ash from all three units, shall be transported as lean slurry by slurry duty centrifugal pumps from bottom ash slurry pump house to disposal area.
f)Ash Water System
Ash water system consists of bottom ash HP water pumps, BA LP water pumps, flushing water pump, fly ash HP water pumps, etc.
2.Some equipments for ash handling system are already supplied by the previous contractor and are available as
3.The scope of work includes balance mechanical, electrical, control & instrumentation works and completion of civil works, structural works and architectural works to provide an integrated ash handling system for three units.