Operation and Maintenance of Ash Handling System

Charges for providing operation staff in all locations of Bottom Ash System, Fly Ash System (including AHP control room operator) including Electrical and C&I works of AHP in NCTPP-III.

I Mechanical Works: A ROUTINE MAINTENANCE WORKS: Fly Ash Handling System: Attending of routine maintenance work (General Shift & Night shift) for up keeping of the Transport air compressor house and its equipments, Vacuum pump house and its connected air line and water lines up to Buffer Hoppers and EOT crane, ESP Hoppers and Ash conveying Pipes in the ESP Area and ensuring the free and continuous flow of fly ash from ESP hopper to fly ash Buffer Hoppers and cleaning the air preheater, duct hoppers and ensuring the free and continuous flow of ash from APH hoppers and Duct hoppers to Buffer hoppers, fluidizing lines from blowers to ESP hoppers and fly ash conveying pipe lines, structures from Air lock vessel to ESP silos and its pneumatic lines, solenoid operated pneumatic valves of Air lock vessels, ESP hoppers, Fluidising pads, working platforms in above hoppers area and hopper gate valves, working platform area and its connected equipments like rotary vane feeders, dust conditioners, mixing pots, blower, sump pumps, vent filter and ensuring the free and continuous flow of fly ash from fly ash silo to closed, open trucks and mixing pot to slurry sump.including cost of Consumables.

Bottom Ash Handling System: Attending of routine maintenance work (General Shift & Night shift ) for up keeping of the Bottom Ash Hopper area and its equipments like Bottom Ash Hoppers, Jaw crushers, Primary stainless steel Belt Chain Conveyors(SSBCC),Clean out chain conveyor and its connected pipelines & its discharge chute, Hydraulic Power Pack for SSBCC , Accumulator Assembly for auto chain tensioning and its pipelines, Secondary transport conveyor, Clean out chain conveyor, Clinker Grinder & its discharge chute, Quenching nozzles, Flushing nozzles, Refractory cooling nozzles, Economiser hoppers & its pipelines and ensuring the free and continuous flow of ash from Eco hoppers to Intermediate surge hopper & all valves in this area, Bottom Ash Silo area and its equipments like Bottom Ash silos and ensuring the free and continuous flow of Bottom Ash from Bottom Ash Silo to closed trucks or through mixing pot to slurry sump, Vent bag filters and silo roof structures for monorail arrangement, purging air pipes and valves, LP and HP water Pumps and its connected pipelines, Dust conditioner pumps & its connected pipelines, 5 ton and 3 ton EOT Cranes, sump drain pump, Rotary vane feeder, Discharge spout for BA Silo & all valves in this area, Tertiary Stainless steel Belt Chain Conveyor and its equipments such as clean out conveyor, dampers and view glasses, Intermediate surge hopper and its equipments such as Target box, milling, vibrating screen, Air lock vessel and its auxiliaries, connected lines, valves.including cost of Consumables.

B. MECHANICAL BREAKDOWN MAINTENANCE: FLY ASH SYSTEM PER UNIT: ESP AND BUFFER HOPPER AREA: Charges for Removal of ash chock from ESP Hopper and ash discharge pipes and fittings: This work involves dismantling the ash discharge valve, Cast iron “T” piece, sleeve coupling and by poking and tapping of ESP Hopper remove the ash choking and then assembling the ash discharge valve ,cast-iron “T” piece and sleeve coupling after removing of chock from ESP Hoppers, APH and Duct hoppers.Including Cost of Hire charges ,Consumables and T&P's

Charges for removal of ash chock in buffer hopper: This work involves dismantling the Ash intake gate valve above the Air lock vessel and removal of ash choke by poking and tapping the buffer hopper. Assembling the Ash intake valve after removal of choking in the buffer hopper Including Cost of Hire charges ,Consumables and T&P's

Charges for Dismantling the Pneumatic operated valve size of 100NB. This work involves transporting the valve from stores to work site, dismantling the vent/balancing line in Air lock vessel, replacing the damaged/defective valve and fixing vent piping.Including Cost of Hire charges ,Consumables and T&P's

Charges for Replacing of Pneumatic operated gate valve size of 150NB/200NB and manual isolation valve 150NB/200NB. This work involves transporting the valve from stores to work site, dismantling the cast iron “T” piece, sleeve coupling and valve. Assembling the new valve, sleeve coupling and cast iron “T” piece after replacing the damaged/defective valve/manual isolation valve.Including Cost of Hire charges ,Consumables and T&P's

Charges for Dismantling of the Pneumatic operated valve size of 250NB. This work involves transporting the valve from stores to work site, dismantling the spool piece, sleeve coupling and valve. Assembling the new valve, sleeve coupling and spool piece after replacing the damaged/defective valve Including Cost of Hire charges ,Consumables and T&P's

Charges for Dismantling of the Pneumatic operated valve size of 300NB/manual isolation valve 300NB. This work involves transporting the valve from stores to work site, dismantling the valve and replacing the defective valve with new valve.Including Cost of Hire charges ,Consumables and T&P's

Charges for Replacing/attending the defects in Pneumatic operated valve size of 350NB. This work involves transporting the valve from stores to work site, dismantling the damaged/defective valve replacing the defective valve with new valve.Including Cost of Hire charges ,Consumables and T&P's