Naphtha catalytic cracking catalyst, catalytic cracking method and reaction device

A method for catalytic cracking of naphtha, comprising:

• S1:
• delivering a catalyst in a pre-lift pipe through a regenerator sloped pipe and to flow upward under the action of a pre-lift medium to enter a dense phase section of a reactor,
• feeding a feedstock containing naphtha into the reactor tangentially upward through a nozzle located at a bottom of the dense phase section of the reactor;
• feeding the feedstock, by the nozzle of the reactor, along a tangential direction of a circular cross-sectional of the dense phase section of the reactor at an angle of 10-90° to a vertical direction;
• S2:
• enabling oil gas and the catalyst from a riser pipe to enter a settler of a reaction device,
• enabling the oil gas from the disengager to enter a separation system, and enabling the catalyst to flow out through a conveying part of a cyclone to fall into a settler stripping section;
• S3:
• stripping the catalyst, enabling the catalyst stripped to enter a regenerator through a spent sloped pipe, and heating the catalyst in the regenerator;
• and
• S4:
• enabling the catalyst to enter a disengager section of the regenerator to fall into a stripping section of the disengager section of the regenerator and enter a degassing tank, and
• stripping the catalyst in the degassing tank and enabling the catalyst stripped to return to the reactor through the regenerator sloped pipe.