AHP Dn Unit I AOH 2024-25 BAH Overhauling of bottom ash hopper ash discharge gate chute scrapper feeders clinker grinders during overhaul of unit

Amount

Dismantling pulling out the service scrapper feeders away from BAH area to facilitate the overhaul works including Consumables and T&P's.

Dismantling, reconditioning, overhauling, renewal of spares and refitting the BAH ash discharge gate assembly inclusive of T&P's, consumables

Dismantling, reconditioning, overhauling and refitting the BAH ash discharge chute assembly inclusive of T&P's, consumables

Reconditioning/overhauling of worn out shaft from the carrying side wheel assembly (Tension or Carrying side Wheel / Return side Wheel assemblies) and submersible wheel renewing the shaft, bearing housings, bearings, refitting in the wheel. Inclusive of T&P's, consumables

Reconditioning/overhauling of submersible wheel renewing the shaft, bearing housings, bearings, refitting in the wheel. Including consumables and T&P's.

Dismantling, Reconditioning/overhauling the Scrapper feeder main drive sprocket assembly and teeth welding with special welding electrode (Bronzed) inclusive of T&P's, consumables and following cost of SS welding electrodes. a) SS welding Electrodes Dia : 4mmx350mm - 32Kgs supplied by contractor.

Picking clinkers from BAH slurry trench, hammering and feeding in to the ash slurry trench including consumables and T&P's

Fabrication & erection of 100 NB pipe lines for seal trub ring header including consumables & T&P's.(100 NB pipe TANGEDCO scope)

Dismantling of quenching nozzle with holder, changing or choke releasing and cleaning and assembling of same/ new including consumables and T&P's.

Dismantling and checking the internals of the scrapper feeder main drive gear box and replacing the worn out bearings / oil seals and assembling of gear box, painting of gear box including bearing cost and transportation. a)Single row deep groove ball bearing 6307 (Input pinion shaft) b) Single row deep groove ball bearing 6309 (1st stage gear) c) Single Row deep groove Jurnal Ball Bearing 6315 (2nd stage gear) d) Single row spherical roller Bearing 23022BD1/23022EAD1/ 23022EAW33/23022EMD1 (3rd stage gear) (Material supplied by contractor)

Decoupling and dismantling the clinker grinder motor, gear box assembly and removing the clinker grinder bed bolts and nuts and bringing down the clinker grinder assembly, motor gear box assembly to the ground level including consumables and T&P's.

Dismantling, transporting, reconditioning/ overhauling, renewal of spares and assembling clinker grinder including cost of bearing, Clinker Grinder Chain Pitch and Plummer Block. Consumables and T&P's. Bearing 22317K with sleeve H 2317 (4 Nos.) will be supplied by contractor.

Removing the clinker grinder gear box, fluid coupling, inspection and replacement if required, re erection and checking the alignment of gear box with clinker grinder drive sprocket using dial gauge including cost of Clinker Grinder Sprocket, consumables and T&P's.

Complete overhaul of clinker grinder gear box including DE & NDE bearings, consumables and T&P's. (Material supplied by contractor)

Reconditioning of the fluid coupling, checking the internals, changing the worn out bearings, oil seals, 'O' rings, metal filling and machining the worn out portions in the hub and reassembling the spares including consumables and T&P's.

Cutting and removing the worn-out eroded clinker grinder bed channels, supporting structures, motor bed, gear box bed and with drawal wheel assemblies and fabrication and erection of the new clinker grinder bed channels, motor bed, gear box bed and fixing the with drawal wheel mounting channels and wheels etc. including consumables and T&P's.

Lifting and positioning the clinker grinder assembly on the mounting frame and fixing motor, gear box assembly, coupling the motor and gear box and checking the alignment etc. including consumables and T&P's.

Cleaning and One coat Red oxide painting two coats of enamel paint over the seal trough supporting structure in A Pass & B Pass of BAH vertical column and standing platform with cost of paint, consumables and T&P's.

Transporting pulling back the service and stand by scrapper feeders near by BAH area after completion of seal trough and its supporting structure, BAH vertical column and standing platform during overhauling works.

Applying refractory inside bottom ash hopper including consumables & T&P’s. (For 10 MT refractory) (1 MT = 1.5 m3) (10 MT = 15 m3).

Erection and dismantling of Scaffolding arrangement including consumables & T&P’s.

MADURA ENGINEERING WORKS (BID ID -1100880)