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750MW Balanced Draft, Pulverized Coal Fired, Radiant Boiler Furnance
PlantSim Unit #4 has a balanced draft Carolina type Radiant Boiler designed
for pulverized coal firing. The unit has 54 dual-register burners arranged in
three rows of inline burners each on both the front and rear walls.
The maximum continuous rating is 5,320,000 lb/hr of main steam flow at 2534 psig
and 1005 F at the superheater outlet with a reheat flow of 4,410,000 lb/hr at
495 psig and 1005 F with a normal feedwater temperature of 541.8 F. Main steam
and reheat steam temperatures are controlled to 1005 F from full load down to
half load (3,368,900 lb/hr) by a combination of gas recirculation and spray
attemperation.
The unit is designed for cycling service and is provided with a full boiler
by-pass system. The unit can be operated with either constant or
variable turbine throttle pressure from 63% of full load on down.
The design pressures of the boiler, economizer and reheater are 2975, 3050, and
750 psig, respectively.
This PlantSim model consists of the following systems:
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