FIELD: fluidized-bed reactors. SUBSTANCE: temperature control is effected through change of rate of recirculation of particles gathered by auxiliary particle separator 22 to reactor 6. Particle accumulator 40 has capacity sufficient for accumulation of adequate amount of particles gathered by auxiliary particle separator 22 required for control of store/temperature of layer due to variations of fuel/sorbent and change in load. Particle accumulator 40 may be located either directly under auxiliary particle separator 22 or at some distance from it. Particles accumulated by auxiliary separator 22 are more preferable as compared with particles accumulated by main particle separator 20 because of their lesser size and lower temperature. Layer temperature control system 80 is used for control of rate of recirculation of these particles back to reactor 6. Particle accumulator 40 is provided with level sensors 44. Level accumulation control system 81 interacts with layer control system 80 and is used to control material margin of particle in particle accumulator 40 through blow system 46. EFFECT: proper control of layer temperature through change of rate of recirculation of particles accumulated by auxiliary or secondary separator carrying particles between auxiliary separator and reactor. 22 cl, 8 dwg
