SALIENT TECHNICAL FEATURES
(STRENGTHENING OF STAGE-II RAW COAL BUNKERS & INSTALLATION OF BUNKER HAMMERING ARRANGEMENT AT NTPC, KANIHA IN 2014-15)
NTPC Talcher-Kaniha (TSTPS) plant is located in Kaniha block under Talcher sub-division of Angul district in the state of Odisha.
Nearest Town : Talcher 26 KMs
Nearest Railway Station : Talcher 29 KMs
Nearest Airport : Bhubaneswar 180 KMs
INSTALLED CAPACITY
STAGE - I - 2 Units each 500 MW - Total 1000 MW
STAGE- II - 4 Units each 500 MW - Total 2000 MW
Stage-I Boiler:- 2 X 500 MW ,Once Through Tower Type, Single pass boiler
No second pass, Maximum Height of Boiler:- 92 Mtr.
Make:- Stein Industries, France,
The main equipments are Boiler, Turbine and Generator.
In the main Boiler following equipments are also involved:-
64 Nos of Wall Blower and 56 Nos of LRSB per boiler. Boiler is equipped with 16 nos Spring Loaded safety valves, 8 Electromatic Relief valves .All Boiler valves except the control valves/Block valves are of BHEL make and mostly are under size 125 Nb. Boiler Burner is having 40 coal nozzles & 20 Oil guns. 10 Ball & Tube Mills, 20 nos. drag chain link type Raw Coal Feeders, 8 Air Preheaters and 8 fans are the main auxiliaries in the Boiler
Stage-II Boiler:- 4 X 500 MW, Circulation type two pass boiler with Drum.
Maximum Height of Boiler:- 85 Mtr. Make:- BHEL,
In the main Boiler following equipments are included per unit:-
88 Nos of Wall Blower and 34 Nos of LRSB per boiler. Boiler is equipped with 16 nos Spring Loaded safety valves, 8 Electromatic Relief valves .All Boiler valves except the control valves/Block valves are of BHEL make and mostly are under size 125 Nb. Boiler Burner is having 40 coal nozzles & 20 Oil guns. 140 Bowl Mills, 40 nos. Gravimetric Belt type Raw Coal Feeders, 16 Air Preheaters and 16 fans are the main auxiliaries in the Boiler
In our stage-II units, there are 40 coal mills. Coal is fed for pulverization to each mill by means of a Gravimetric feeder. A raw coal bunker is provided for each mill for storage of coal. Coal flows in the bunker during the operation of Mills. The Raw coal bunkers are fabricated cylindrical shell at the top and conical portion made of stainless steel at the bottom. To ensure reliable operation of the milling system, additional stiffeners are being provided at four elevations alongwith the stiffeners. The detailed arrangement of providing stiffners is shown in the Drawing attached. The job involves scaffolding work after obtaining working at height permit from NTPC, providing stiffeners of MS plate at four elevations, inspection by FQA. The detailed scope of work is as attached. This contract has been planned for execution of the job in all Raw coal Bunkers of Unit-V & Unit-VI of Talcher-Kaniha.
The job has to bout as per the drawing, scope of work, terms and conditions and as per the regular instruction of EIC.