FIELD: separation of solid particles from hot gas flow. SUBSTANCE: centrifugal separator includes vortex chamber formed by cooling plates or panels; this chamber is not cylindrical in form. Chamber is provided with at least one gas inlet, one gas outlet and one outlet for escape of solid separated particles. Cross section of side walls of vortex chamber forms gas space which is not absolutely round in section; it has form of polygon at roundness 1, for example 1.1 and preferably 1.5. EFFECT: enhanced efficiency. 22 cl, 7 dwg
