Fluidized bed reactor for achieving high efficiency and preventing back-mixing

摘要

PURPOSE: A fluidized bed reactor for achieving high efficiency and preventing back-mixing is provided to increase a residence time of the charged particles as smoothing flow of charged ore particles, reaction efficiency of the particles, reaction ratio, and use efficiency of a reaction gas. CONSTITUTION: In a reactor discharging the reduction reacted ore particles into the outside after reduction reacting charged ore particles using a reduction gas supplied from the lower part to the upper part of the reactor through a dispersion plate(50) installed in a main pipe(9), the fluidized bed reactor for achieving high efficiency and preventing back-mixing comprises a first fluidizing chamber(10) formed at the inner part of a first cylindrical partition(3) in which a vertical charging pipe(8) where the ore particles are charged in is disposed; a second fluidizing chamber(20) equipped with a second cylindrical partition(4) disposed at the outer side of the first cylindrical partition(3) with spaced apart from the first cylindrical partition(3) in a certain distance so that ore particles flown over the upper part of the first cylindrical partition(3) are filled in the second fluidizing chamber(20); a third fluidizing chamber(30) in which particles flown in through a discharging port(4b) at the lower part of the second cylindrical partition(4) are filled; first, second and third wind boxes(3a,4a,9a) supplying the reduction gas into the first, second and third fluidizing chambers(10,20,30); and a discharge pipe(6) which is mounted on the outer surface of the third fluidizing chamber(30) to discharge the reduction reacted ore.