FIELD: chemical equipment. SUBSTANCE: fluidized bed apparatus, for example, cinder cooler, includes first and second fluidized bed chamber; each chamber has bottom part and side walls. Liquefying gas is introduced into bottom parts for liquefaction of macroparticles inside chambers. Flow smoothing-out device (for example, barrier with set of holes) divides chambers and ensures smooth flow of macroparticles from first chamber to second one to avoid dead zones in chambers near flow smoothing-out device. Barrier is provided with heat-exchange element for circulation of heat exchange fluid medium in barrier. Besides that, one or both chambers are also provided with heat exchangers for cooling macroparticles. Macroparticles are mixed in second chamber and may be returned to gasifier (combustion chamber) after cooling followed by feeding the cinder to first chamber. Sorting chamber is provided between reactor and first chamber. Liquefying gas may be returned to reactor from chambers. EFFECT: enhanced efficiency of mixing solid particles; effective use of space and materials. 28 cl, 6 dwg
