FIELD: chemical engineering. SUBSTANCE: invention relates to reactors with circulating fluidized bed in processes of combustion, heat exchange, in chemical and metallurgical processes. Solid particles are transferred from the first chamber (combustion chamber of fluidized-bed reactor) into adjacent chamber (e.g. a transfer chamber and/or working chamber) with provided seal and/or controlled valve for solid particles stream at the chamber interface. Transporting gas is fed into the first chamber to transfer solid particles into the second chamber in several streams. A number of stacked up narrow passages in partition with height to length ratio not more than 0.5 with height not exceeding 50 mm are used as a seal and controlled valve for solid particle stream. Transporting gas may be entered through lower part of the first chamber and/or through side wall in front of partition. The latter may be covered with a refractory material near the first chamber with passages in the refractory coating made of a combustible material which is burned through when refractory coating is heated. The passages may also be slightly inclined from the first chamber toward the second one, say at the angle 15 deg. EFFECT: enhanced efficiency of process. 25 cl, 5 dwg
