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Hot start-Up(Within 8 Hours)

Stopping- Starting of 2nd PAPH Each unit is provided with two bi-sector type regenerative primary air preheaters to recover the                 heat from waste flue gas leaving from the furnace and utilised to preheat the primary air which inturn                 used to dry the raw coal and transport pulverised coal powder from mill to the furnace through coal pipes.               Air pre-heater consists mainly rotor housing, cylindrical cellular rotor, guide and Support bearings, oil                 systems for guide and support bearings, soot blower system, Stationary water washing devices & fire                 fighting...

BCW Pump STARTING THE BCW PUMP : - F.1 PRE START CHECKS BEFORE INITIAL STARTING OF THE PUMP 1 Boiler Drum is filled & drum level is maintained on positive side (+200 mm) for starting first     pump.                     2 SGECW System & BCW Booster Pump is in service.           3 Emergency over head tank level OK.               4 Ensure that pump & pump cooler is completely vented.           5 Start permissive is available.                 6 LP cooling water valves are open and the cooling water flow is > 75 LPM.       7 All other valves must be clos...

BAHP -BALP Low pressure ash water system caters water at the following areas (BALP pumps):               1. Ash slurry sump makeup.                           2. Ring header for seal trough makeup / flushing.                       3. Refractory cooling supply.                           4. Bottom ash hopper makeup / filling.                         5. Bottom ash hopper window spray.                         ...

Control Fluid system Control fluid (A fire resistant fluid) is used as operating media for oil operated HP & IP stop / control valves. This control fluid system also supplies control fluid as operating media for LPBP stop & control valves. The control fluid system contains two 100 % capacity pumps with double discharge i.e. LP control fluid delivered at 8 bar pressure from the 1st stage of the pump and HP control fluid delivered at 32 bar pressure from the pump 4th stage, two coolers (one being standby). There is no common filter, each sub system has got its own Duplex or rotating filters. CF tank is provided with two oil vapour exhausters, which extracts non condensable gases from the tank and expels to atmosphere. There is a temperature control valve which Controls oil temperature by controlling oil flow through the cooler. There is an electrical heater provided in the control fluid tank to...