Device and method for reducing the temperature of catalytic cracking regenerated catalyst

Abstract

The invention discloses a device and a method for reducing the temperature of catalytic cracking regenerated catalyst in the field of petrochemical industry catalytic cracking and aims to solve the problems that the method for reducing the temperature of catalytic cracking regenerated catalyst has a small application range in the prior art, and the like. The device comprises a regenerated catalyst cooler (4) arranged below a regenerator (1) and the bottom head of the cooler is internally provided with a cooling main air distributor (8). A sleeve (5) is arranged between the top of a taper section of the regenerated catalyst cooler and the bottom of the regenerator and provided with a regenerated catalyst conveying pipe (3) internally, and an annular space (6) is formed between the sleeve and the conveying pipe. A regenerated inclined pipe (11) is arranged between the regenerated catalyst cooler and a heavy oil riser reactor (12) of a catalytic cracking device. The invention also discloses a method for reducing the temperature of catalytic cracking regenerated catalyst by adopting the device. The device and the method can be used for setting a catalytic cracking device of a single heavy oil riser reactor and a plurality of riser reactors.

Description

Technical field

[0001] The invention belongs to the field of petrochemical catalytic cracking, and relates to a device and method for reducing the temperature of a catalytic cracking regenerated catalyst. Background technique

[0002] At present, a type of catalytic cracking unit used in the catalytic cracking process of the petrochemical industry is equipped with a single heavy oil riser reactor or multiple riser reactors (including a heavy oil riser reactor). The outlets at the top of each riser reactor are respectively communicated with the respective settlers, and the bottom is communicated with the regenerator through respective regeneration inclined pipes and regeneration risers. In the above-mentioned catalytic cracking unit, the regeneration temperature of the catalyst is generally 690 to 750°C. Due to the high temperature of the regenerated catalyst and limited by the thermal balance of the device, the catalyst-to-oil ratio of the heavy oil riser reactor is relatively sm...

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