Foreign material discharge device and foreign material discharge manner null of wraparound fluid bed

摘要

PROBLEM TO BE SOLVED: To discharge foreign matter in fluidized medium out of a fluidized bed type furnace by a method wherein a bottom part is communicated with a furnace bottom part of a main body of a circulating fluidized bed type furnace by a fluidized medium discharging passage, a top part is communicated with a furnace intermediate part by a fluidized medium returning passage through a classifier, a foreign matter discharging pipe is projected at the bottom part, and a cooling air injection nozzle and a vibration conveyor are provided. ;SOLUTION: A cylindrical classifier 6 and a furnace bottom part 1c are communicated with a fluidized medium discharging passage 7, and a furnace bottom part 1c and the classifier 6 are communicated with a fluidized medium returning passage 8. An opening or closing device 9 is arranged within the fluidized medium discharging passage 7, fluidized medium b is fed out by a fluidized medium transferring device 10 and then a foreign matter discharging pipe 11 is arranged below the classifier 6. A cooling air injection nozzle 12 is arranged below the classifier 9 and a mixture I of the fluidized medium B and foreign matter Ao flowing from the foreign matter discharging pipe 11 is received by a vibration conveyor 14. With such an arrangement as above, it is possible to perform a sequential transfer of the foreign matter Ao and the fluidized medium B in the thick layer toward the fluidized medium extracting port 4.;COPYRIGHT: (C)1998,JPO