The invention relates to a
coal water
slurry feeding device for a multi-flow
circulating fluidized bed boiler and the boiler. The
coal water
slurry feeding device comprises a
slurry supply pump (1), a slurry supply
pipe (2), a
coal water slurry granulator (3) and secondary air ports (5), wherein the slurry supply
pipe (2) is communicated with the slurry supply pump (1), and the other end of the slurry supply
pipe (2) is communicated with the
coal water slurry granulator (3) distributed at the top of a main
combustion chamber (4); the secondary air ports (5) are distributed in positions close to tops of side walls of an auxiliary
combustion chamber (6); a
sprayer (33) of the
coal water slurry granulator (3) is arranged in the
hearth of the main
combustion chamber (4), fixed at the lower end of a movable part (32) and can rotate along with the movable part (32);
coal water slurry can be sprayed in a slurry droplet form under the
centrifugal force of the
sprayer (33). The coal water slurry feeding device has the advantages that coal water slurry droplets can be easily decomposed and pyrolyzed, the coal water slurry droplets can be evenly distributed, low-temperature combustion is facilitated,
raw material requirements on coal quality can be lowered greatly, and cost is saved; uncombusted coal water slurry particles can be combusted sufficiently favorably, and combustion efficiency is increased.