MIXING DEVICE FOR MIXING RAW MATERIAL AND CATALYST IN FLUID CATALYTIC CRACKING DEVICE

摘要

The mixing device of the present invention for mixing a raw material and a catalyst used in a fluid catalytic cracking device is provided with a cylindrical reaction container (5) for supplying a catalyst (S) in the vertical direction a plurality of raw material spraying nozzles (6a) disposed along the external periphery of the reaction container (5) and a catalyst flow rectifier (7) for rectifying a flow of the catalyst (S) in the vicinity of the raw material spraying nozzles. The catalyst flow rectifier (7) lacks functionality for supplying raw material and forms a hollow cylindrical catalyst movement layer coaxially with the reaction container (5) in the vicinity of the raw material spraying nozzles (6a). Backflow of sprayed fuel can be effectively prevented by the catalyst flow rectifier. The mixing device has a simple structure yet has a high cracking rate. Maintenance of the fluid catalytic cracking device is facilitated.