Equipment for mixing catalyst

Abstract

The invention discloses a catalyst mixing device, aiming at solving the problems of large depression generated by a lifting medium to the blanking of an inclined blanking tube and being incapable of better uniformly mixing strands of catalysts with different characters respectively existing in the prior catalyst mixing device. In the invention, the interface locations of each inclined blanking tube (6) and each cylinder (4) is horizontally provided with a draft tube (7); the outlet end (71) of the draft tube is oblique with a plane vertical to the coaxial direction of the draft tube. A lifting medium distributer (5) is arranged in the cylinder; the top outlet (51) of the lifting medium distributer (5) is not lower than the top end of the outlet end of each draft tube. The top part of the top taper section (9) of the cylinder is provided with a deflection cylinder (3). The outlet end of the draft tube can lead the catalyst to cover an annular area between the cylinder and the lifting medium distributer on a horizontal direction after flowing out from the draft tube by surrounding the incline direction of the axial lead of the draft tube. The invention is mainly applied to a lifting tube reactor in the fluid catalytic cracking field of the hydrocarbon materials in petroleum refining and petroleum chemical industries.

Description

technical field [0001] The invention belongs to the field of fluidized catalytic cracking of hydrocarbon raw materials in petroleum refining and petrochemical industries, and relates to a catalyst mixing device used in a riser reactor. Background technique [0002] In certain types of fluidized catalytic cracking (FCC) riser reactors (such as the heavy oil riser reactor in the double riser catalytic cracking unit disclosed by Chinese patent CN100338185C), it is necessary to combine multiple strands with different properties (mainly different temperatures) Catalysts with different activities) are sent to the catalyst mixing equipment for mixing, and then the mixed catalyst enters the riser reactor, and after contacting with the feed oil mist sprayed from the feed oil nozzle on the riser reactor, the catalytic cracking reaction takes place. The purpose of mixing the catalyst is mainly to enable the riser reactor to operate under the optimized process conditions of large agent-...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst mixing device to solve the problem that the above-mentioned lifting media existing in the existing catalyst mixing device have a relatively large blocking effect on the feeding of the feeding inclined tube and cannot well combine multiple strands of different properties. The catalysts are evenly mixed, and the structure is relatively complex, etc.

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