REGENERATOR OF THE PARAFFIN HYDROCARBONS DEHYDROGENATION SYSTEM C-C (VARIANTS) Russian patent published in 2022 - IPC B01J38/30 B01J8/24 C07C11/06 C07C11/08 C07C11/10 B01J21/02 B01J23/26 

FIELD: petrochemistry.

SUBSTANCE: invention relates to the field of petrochemistry, in particular to installations for dehydrogenation of paraffin hydrocarbons C3-C5 into corresponding olefin hydrocarbons used to produce basic monomers for synthetic rubber, as well as in the production of polypropylene, methyltretic butyl ether, etc. The invention concerns a regenerator of a C₃-C₅ paraffin hydrocarbon dehydrogenation system with a fluidized bed of a finely dispersed alumo-chrome catalyst having a cylindrical housing (1), an air supply pipeline (2) through a distributor (3) in the lower part of the fluidized bed, a fuel gas input pipeline (4) through a burner device (5) in the upper part of the fluidized bed, the transport pipe (7) for entering the upper part of the fluidized bed of a gas suspension from the catalyst spent in the reactor and the transporting air (46), partitioning gratings (8) located along the height of the fluidized bed, containing at the same time a catalyst heating zone (9) by burning fuel gas supplied to the burner device (5) and burning coke from the catalyst in the upper part of the fluidized bed, a catalyst oxidation zone and desorption of oxidation products (10) by air supplied to the regenerator in the lower part of the fluidized bed above the air distributor (3), as well as a catalyst preparation reduction-desorption cup (11) in the lower part of the regenerator housing (1), which has overflow holes (20) in the upper part for the flow of the catalyst from the regenerator into the reducing cup (11), distributors (13), (14) for supplying, respectively, the reducing gas through the pipeline (15) and inert gas through the pipeline (16), partitioning grids (12) located at the height of the reducing cup (11), a gas pipe (22) for removing the exhaust gases of the catalyst preparation to the upper part of the fluidized bed of the regenerator connected to the upper lid (21) of the reducing cup (11), and a nozzle (17) in the lower part of the reducing cup (11) for the output of the regenerated and prepared catalyst to the reactor through a pipeline (42), as well as the branch pipe of the regeneration gases (55) in the upper part of the regenerator housing (1). In the catalyst heating zone (9), a burner device (31) is installed for afterburning the exhaust gases of the catalyst preparation (39), containing a gas pipe (22) with an open upper end (64) pointing upwards. Mounted on the upper end (64) of the gas pipe (22), the first disk (23) surrounding the opening of the gas pipe (22), and the second disk (24) located some distance up from the first disk (23) and is rigidly connected to it to form between the disks (23), (24) an open ring-shaped space (25). The burner device (31) has a dispensing chamber (26), (43) connected to the air inlet pipeline (28), made in the form of a dispensing pipe (27) attached to the second disk (24) and located coaxially inside the gas pipe (22) or in the form of an annular box (47) surrounding the gas pipe (22), and the dispensing chambers (26), (43) have, respectively, metering holes (29), (45) located below the first disk (23) of the burner device (31) in the wall of the dispensing pipe (27) or in the wall of the gas pipe (22) located below the first disk (23) of the burner device (31), for the intake of air into the exhaust gas stream of catalyst preparation (39) with the formation of a ring-shaped channel (50) or cylindrical channel (37) on the section of the gas pipe (22) between the metering holes (29), (45) and the first disk (23) of the burner device (31), which are the mixing chamber for pre-mixing of the exhaust gases of the preparation of the catalyst and the air supplied through the pipeline (28). The invention also concerns a variant of the regenerator of the C₃-C₅ paraffin hydrocarbons dehydrogenation system.

EFFECT: increase in the efficiency of afterburning of the combustible part of the products of the reduction-desorption preparation of the catalyst in the fluidized bed of the regenerator heating zone, with improved conditions for the safe conduct of the process, an increase in the technical and economic indicators of the processes of dehydrogenation of paraffin hydrocarbons, reducing air consumption for regeneration, increasing the activity of the catalyst, stabilizing the operation and expanding the possibilities of increasing the capacity of dehydrogenation plants.

48 cl, 8 dwg, 1 tbl