Abstract In a fluidizing device adapted to effect chemical reaction, heat transfer, material transfer, etc. and provided with a cyclone unit, a plurality of internal members made of bars or tubes are disposed at fixed intervals within a free board section formed above the fluidized bed. When the fluidizing device has the internal members disposed as described within the free board section, agglomerates of constituent particles of the fluidized bed which fly out of the fluidized bed come into contact with the said internal members, with the result that the kinetic energy possessed by each agglomerate of particles is gradually consumed in the course of several contacts and the vertical component of the speed vector of the agglomerate of particles flying toward the cyclone unit is proportionally decreased. Consequently, the amount of fine particles produced due to collision into the inner wall surface of the column is markedly decreased and at the same time the absolute amount of particles flying into the cyclone unit is decreased to a great extent.
In a fluidizing device incorporating a free board section of a fluidized bed, an improvement which comprises in combination a plurality of internal members each having a horizontal width of between 0.1 and 0.01 times the height of the fluidized bed and disposed in the free board section formed above the fluidized bed so that the interval between each internal member and the nearest neighboring internal member falls in the range of 0.05 to 0.3 times the height of the said fluidized bed and the projected area ratio of all the internal members to the area of the cross section of the free board section is not smaller than 0.5.
Claim 2
Dependent Claim
110 words
In a fluidizing device incorporating a free board section of a fluidized bed, an improvement which comprises in combination a plurality of internal members each having a horizontal width of between 0.1 and 0.01 times the height of the fluidized bed and disposed in the free board section formed above the fluidized bed so that the interval between each internal member and the nearest neighboring internal member falls in the range of 0.05 to 0.3 times the height of the said fluidized bed and the projected area ratio of all the internal members to the area of the cross section of the free board section is not smaller than 0.5.
Claim 3
Dependent Claim
24 words
A fluidizing device according to claim 1, wherein the internal members in the lowest level fall in the mean boundary of the fluidized bed.
Claim 4
Dependent Claim
41 words
A fluidizing device according to claim 1, wherein the plurality of internal members are disposed in at least three horizontal stages spaced by vertical intervals falling in the range of between 0.05 to 0.3 times the height of the fluidized bed.
Claim 5
Dependent Claim
26 words
A fluidizing device according to claim 3, wherein the individual internal members in each successively lower stage and those in the immediately upper stage are staggered.
Claim 6
Dependent Claim
33 words
A fluidizing device according to claim 3, wherein the individual internal membErs in each successively lower stage and those in the immediately upper stage are disposed so as to form a latticework pattern.