The invention discloses a circular ash removing method suitable for a
fluidized bed boiler, and belongs to the technical field of ash removal of boiler equipment. The circular ash removing method suitable for the
fluidized bed boiler comprises a sand loading step and a recycling step, and is characterized in that in the sand loading step, sand is loaded in a sand hopper of a circular sand ash blower; in a
sand blasting step, the sand in the sand hopper is placed in a sandblast, and is sprayed in a shaft at the
tail by the sandblast; in the recycling step, after scouring a
superheater, an
economizer and an air pre-heater, the sand sprayed in the shaft at the
tail flows into a
fluidized bed of the circular sand ash blower, and is recycled via an
auger connected to the fluidized
bed; and in a sand lifting step, the sand recycled by the
auger is elevated and moves to a position above the sand hopper through an electric hoist, and is discharged into the sand hopper through a sand discharging trolley to form a circular ash removal cycle. By the circular ash removing method suitable for the fluidized
bed boiler, the sand can be circularly used to remove ash on a heat exchange component in the shaft at the
tail, the heat exchange efficiency is improved, and boiler steam rate is increased. The circular ash removing method suitable for the fluidized
bed boiler has the features of low
energy consumption and good ash removal effect.