SAND FALLING TYPE CIRCULATING FLUIDIZED BED BOILER HAVING A PLURALITY OF RISER SECTIONS AND OPERATION METHOD THEREOF

摘要

To provide a fluid sand falling type circulating fluidized bed boiler with a plurality of riser sections and an operation method thereof, for more detail, to provide a fluid sand falling type circulating fluidized bed boiler with a plurality of riser sections and an operation method thereof, for preventing erosion and corrosion of water tubes and increasing combustion efficiency.SOLUTION: The fluid sand falling type circulating fluidized bed boiler with a plurality of riser sections is provided that comprises: a boiler section into which fuel and an oxidizer are injected; a riser section connected to the boiler section so that the fuel and fluid sand supplied from the boiler section are introduced from the under side and flow up; and a relay section which is provided to connect to the boiler section and an upper side of the riser section and supplies the fluid sand having passed through the riser section to the boiler section, wherein the fuel is injected from an upper side of the boiler section, and burned while flowing down.SELECTED DRAWING: Figure 1