FIELD: treatment of hot gases produced in high-temperature processes in circulating reactor with fluidized bed. SUBSTANCE: method includes supply of gases to mixing chamber, their mixing with solid particles forming circulating mass to produce gas suspension, supply of gas suspension from mixing chamber to separator, separation of solid particles from treated technological gases in separator, and return of solid particles from separator to mixing chamber. In this case, at least one part of solid particles returned to mixing chamber is supplied in the form of descending flow, and hot process gases are supplied to mixing chamber in form of concentric ascending flow. The device has mixing chamber with branch pipe for supply of hot process gases located in mixing chamber lower part and separator of solid particles having return channel located coaxially with branch pipe and whose body forms vertical channel together with chamber internal wall for supply of gas suspension from mixing chamber to separator. EFFECT: higher efficiency. 7 cl, 3 dwg
