Standard Technical Features of BTG System for Supercritical 660 ...
Standard Technical Features of BTG System for Supercritical 660 ...
Standard Technical Features of BTG System for Supercritical 660 ...
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<strong>Standard</strong> <strong>Technical</strong> <strong>Features</strong> <strong>of</strong> <strong>BTG</strong> <strong>System</strong> <strong>for</strong> <strong>Supercritical</strong> <strong>660</strong>/800 MW Thermal Units5.4.6 Electrostatic precipitatori) The ESP air in leakage shall not be more than 1% <strong>of</strong> total gas flow atESP inlet at the guarantee point condition and shall be demonstrated.ii)iii)The maximum pressure drop through the ESP at the guarantee point flowcondition shall not exceed 25 mmwc and shall be demonstrated.Uni<strong>for</strong>mity <strong>of</strong> the gas distribution in the various streams and inside thecasing shall be demonstrated as per specified/ quoted value.5.4.7 No fuel oil support above 40% BMCR loadIt shall be demonstrated that oil support <strong>for</strong> flame stabilization shall not berequired beyond 40% <strong>of</strong> BMCR load when firing the coals from the rangeidentified. It shall also be demonstrated that with any combination <strong>of</strong> mills/adjacent mills in service, the steam generator shall not require any oil firing<strong>for</strong> stable and efficient boiler operation at and above 40% BMCR load.5.4.8 Per<strong>for</strong>mance characteristics <strong>of</strong> fansSatisfactory operation <strong>of</strong> FD, ID and PA fans without undue noise andvibration while operating in isolation or in parallel with other fans shall bedemonstrated at site.5.4.9 Steam temperature imbalanceIt shall be demonstrated at SH and RH outlets (in case <strong>of</strong> more than one outlet)that the temperature imbalance between the outlets does not exceed 10 0 Cunder all load conditions.5.4.10 SH and RH tube metal temperatureIt shall be demonstrated that superheater and reheater tube metal temperatureat critical locations remain within maximum tube metal temperature limits asper design <strong>of</strong> the OEM under various load conditions (i.e. 100%, 80%, 60% &50%).5.4.11 Superheater and reheater attemperation systemIt shall be demonstrate that the spray water flow <strong>of</strong> SH attemperation systemdoes not exceed 8% <strong>of</strong> main steam flow, at superheater outlet, while firing anycoal from within the range specified with HP heaters in service whilemaintaining the rated SH outlet steam temperature at all loads upto andincluding BMCR. It shall also be demonstrate that the RH temperature ismaintained at the rated value without any spray water requirement undernormal operating conditions.16
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