FIELD: reactor devices with fluidized beds. SUBSTANCE: device includes reaction chamber 112 containing circulating (fast) layer with first screen 114 for introducing liquefying gas and bubbling (slow) fluidized layer 116 having second screen 120 for introducing fluidized gas. Second screen is mounted below first one. First connector 122 and second connector 123 are located between circulating and bubbling layers. Particles flow circulating layer through first connector to bubbling layer and vice versa for second connector. Connectors are so positioned that the pressure and density within layer are the only mechanism which ensures motion force for control of flow of particles from circulating layer to bubbling layer. Indirect action heat exchanger 128 may be located in bubbling layer for cooling the particles; partitions 130 of different construction may be fitted for separation of bubbling layer and for determination of connectors. EFFECT: enhanced efficiency of cooling solid material at any working load. 21 cl, 5 dwg
