Abstract: A bladed reactor for pyrolysis of hydrocarbons comprises a rotor with blades that form an axial-flow blade cascade, a fixed torus-shaped hoop that adjoins the tips of the blades, and a housing that encloses the hoop and a rotor periphery so that a passage having a ring shape of its meridian section is formed. One or more partitions are installed in the passage, an inlet port is located directly after each partition while an outlet port is located directly in front of each partition. Nozzle vanes forming a nozzle cascade are installed upstream of the blade cascade, and diffusing vanes forming a diffusing cascade are installed downstream of the blade cascade. There is a vaneless space between the exit from the diffusing cascade and the entry into the nozzle cascade.

Abstract: A bladed reactor for the pyrolysis of hydrocarbons comprises a rotor with working blades that form an axial bladed cascade, a fixed toroidal collar that adjoins the ends of said blades, and a housing that surrounds the collar and the periphery of the rotor in such a manner that a passage with an annular meridional section is formed. One or more barriers are mounted in the passage, an inlet orifice being arranged after each barrier and an outlet orifice being arranged in front of each barrier. Nozzle blades forming a nozzle cascade are mounted on the inlet side of the rotor cascade, and diffuser blades forming a diffuser cascade are mounted on the outlet side of the rotor cascade. There is a space without blades between the outlet of the diffuser cascade and the inlet of the nozzle cascade.

Abstract: Process for producing low-molecular olefins by pyrolysis of hydrocarbons comprising mixing of feedstock with steam-diluent, preheating the resulting mixture, rapid heating the said mixture up to pyrolysis temperature and maintaining this temperature inside reactor during residence time, quenching product stream and subsequent fractionation of products. The reactor has an annular work cavity where stationary blades and rotatable work blades are located. A ring vortex flow is created and maintained in the work cavity when the work blades are rotated. A heat needed for pyrolysis is generated due to hydrodynamic drag of rotated work blades. Heating the mixture up to pyrolysis temperature is performed by mixing with hot process stream recirculated in the work cavity for a negligible time in comparison with the residence time. The process enables increase of the low-molecular olefins yield.