West Bengal Power Development Corporation Limited has published Tender For Overhauling Of Mechanical System For Ash Handling Plant Of U 4 Stg Ii. Submission Date for this Tender is 23-12-2023. Ash Handling Machine Tenders in sagardighi West Bengal. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Job description |
| 2 | BA Feed gate actuator cylinder dismantling, cylinder seal kit checking if require replacement, gasket fitting and cylinder fitting, if require then cylinder replacement. |
| 3 | BA Feed gate alignment, checking/ Replacement of side guide angles, rollers, wedges including water leakage arrest from enclosure body & view glass checking and replacement, if required. |
| 4 | BA Clinker grinder overhauling (Dismantling of crusher, checking/replacement of shaft, cam segments, sleeve, bearings, wear plates, sprocket etc.)and/or replacement of complete assembly of clinker grinder |
| 5 | BA Clinker Grinder gear box & fluid coupling checking, oil replacement/bearing replacement. Alignment of motor to gear box to clinker grinder. Gear box/Fluid coupling replacement if necessary. |
| 6 | BA Jet Pulsion pumps overhauling including checking/replacement of nozzle tip, nozzle plate, wear piece intermediate, throat increaser. |
| 7 | BA hopper four side trough seal nozzle checking, welding of nozzle pipe.Seal trough cleaning & water flushing. |
| 8 | BA clinker grinder feed sump checking, Repairing/replacement, welding, painting and refitting. |
| 9 | BA hopper all wall jetting nozzle checking/replacement. |
| 10 | Checking of BA area KGV, then servicing/replacement if required. |
| 11 | Checking & servicing/replacement of Water line valves (Gate, Globe and Plug) at BA area. |
| 12 | Refractory work inside BA hopper with Supply of refractory, fire crete special castable recommended service temp. 1350 deg C, refractoriness (min) 1450 deg C, dry density (kg/m3) 2250, cold crushing strength (kg/cm2) 400(at 110 deg C) and 300 (at 1350 deg C), Pack size 50 kg with supply of anchor fasteners(if required) & wire mesh |
| 13 | Refractory cooling header(100NB,SS316) And cooling water supply pipe(25 NB, SS 316)checking, fabrication & replacement |
| 14 | Checking and replacement of coupling gasket along with replacement of fittings (elbow, lateral etc.) for 250NB BA Slurry pipeline below BAH area |
| 15 | Replacement of 250NB BA Slurry pipeline near BA Hopper area (3 nos. pipelines) |
| 16 | Checking and Servicing/Replacement of Economizer hopper KGV |
| 17 | Checking/replacement if required of drop pipe below each eco hopper & Fabrication & erection of adaptor below each Economizer hopper |
| 18 | Replacement of 200 NB MS discharge pipe from flushing apparatus including fabrication of miter cut bends and reducers. |
| 19 | Replacement of 300 NB MS/ DRC Pipe Common discharge pipe below economizer flushing apparatus including fabrication and erection of discharge cone of individual flushing apparatus discharge pipe up to BA hopper and others areas at AHP as required |
| 20 | Dry & wet cleaning of Economizer hoppers |
| 21 | Dry & wet cleaning of ash from insideof Air Preheated hoppers |
| 22 | Vacuum line Gasket checking and replacement |
| 23 | Overhauling of ESP Material Handling valve replacement if required. |
| 24 | Overhauling of APH Material Handling valve replacement if required. |
| 25 | Replacement of ESP hopper fluidizing tiles |
| 26 | Wetting head nozzle cleaning / replacement |
| 27 | Wetting head replacement if required |
| 28 | Replacement of Collector tank cone |
| 29 | Checking/replacement (if required) of Impingement plate/wear plate/baffle plate inside each Collector tank. |
| 30 | Checking/replacement (if required) of Collector tank drop pipe. |
| 31 | Wet mode air washer nozzle cleaning/ replacement. Ash cleaning inside of air washer. |
| 32 | Fluidizing airline flushing/cleaning For ESP hoppers |
| 33 | Fly ash pipeline (6”, 8” & 10”) checking /replacement, if required |
| 34 | Fly ash pipe line (vacuum line)bend, elbow, lateral, match piece checking & replacement |
| 35 | Checking/servicing/replacement of Segregating valves 200 NB and 250 NB. |
| 36 | Checking/servicing/Replacement of vacuum breakers |
| 37 | Servicing / Replacement of all water line valves of FAE Tower ,necessary rectification if required |
| 38 | Water washing of 200 NB Vacuum line from Vacuum pump to Collecter Tank, Vacuum Pump and Silencer |
| 39 | Adopter below ESP Hoppers & APH Hoppers Checking, repairing & replacement if required |
| 40 | Checking and Servicing/replacement of Manual KGV below ESP & APH Hoppers |
| 41 | Replacement of different sizes of water pipeline (200 NB& above ) |
| 42 | Replacement of different sizes of water pipeline (15 NB to 150 NB ) |
| 43 | Cleaning ofBuffer hopper, Intermediate Surge hopper, Transfer hopper, Air lock vessels and disposal of ash from worksite to suitable place (as per instruction of department) for FAE tower #4A & #4B |
| 44 | Each Air lock vessel’s top & bottom gate seat and disc checking/replacement(if required) |
| 45 | Each air lock vessel’s vent/equalizing |
| 46 | Intermediate Surge hopper wall body welding checking, repairing and strengthening |
| 47 | Checking/replacement of each Transfer vessel fluidizing tiles, top & bottom gate, vent/equalizing valve |
| 48 | Checking/repairing/replacement of square tiles with gasket of Intermediate Surge hopper. |
| 49 | Checking/cleaning/replacement of total filter bags for all buffer hoppers of FAE tower #4A & #4B including pulse jetting bar. |
| 50 | Installation of different types of valves (20 NB to 250 NB) for ash handling system |
| 51 | Fabrication & Erection of Platforms & walkway with hand rail at different areas at AHP, STG-2 (i)Walk-way with hand rail through Common Eco hopper discharge header for U#4. (ii)Platform with hand rail at HP water supply line isolation valve to Eco hoppers (U#4) (iii) Platform with handrail at each BA Hopper feed gate power cylinder (total- 6 nos) for maintenance purpose (iv) Platform with handrail at different location as requitedat FAE Tower – 4A & 4B vertical Fly ash vacuum conveying line for coupling/pipe maintenance purpose (v)Vacuum pump silencer body repairing/refurbishment work (10 nos. silencer) |
| 52 | Couplings /Bends/Lateral checking and rectification by fabrication if required for 200NB and above pipe lines |
| 53 | Replacement/repairing of flushing Apparatus of Economizer hoppers |
| 54 | Replacement/repairing of seal box of Economizer hoppers |
| 55 | Dismantling & Replacement of bottom ash hopper feed gate including pneumatic cylinder assembly |
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