PARAMETERS REQUIRED TO BE MAINTAINED STRICTLY FOR EFFICIENT OPERATION OF AFBC BOILERS Bed Height/FD Air Pressure Primary Air Pressure Bed Temp./Furnace Temperature Fuel Size Bed Material size & Specifications Air & Fuel ratio BED HEIGHT/FD AIR PRESSURE Static height for AFBC Boiler is to be maintained 300 to 325 mm during initial light up of boiler. Expand bed height for AFBC boiler is to be maintained 500 mmwc to 600 mmwc. FD Air discharge Pressure is to be maintained 600 to 650 mmwc. Wind box or Air Box pressure is to be maintained 500 to 600 mmwc. NOTE: High W.B. pressure increases the erosion of bed coils & low W.B. stops fluidization. PRIMARY AIR PRESSURE P.A. fan air header pressure for AFBC boiler is to be maintained 1000 to 1150 mmwc. Difference of primary air pressure & F.D. wind box pressure is to be maintained approximately 500 mmwc. NOTE: High P.A. pressure increases the bed coil e
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