Double-particle-flow catalyst reaction unit, device, system and coupling method

The invention relates to a double-particle-flow catalyst reaction unit, device, system and coupling method, the double-particle-flow catalyst reaction unit comprises a first reactor with an inlet at the bottom and an outlet at the top end, and one side of the first reactor is provided with an inclined pipe for introducing a heavy particle catalyst and a light particle catalyst; the first reactor comprises a mixing buffer area which is positioned at the lower part of the first reactor and has a big-end-up conical longitudinal section, and a carrying-out regulation and control area which is positioned at the upper part of the first reactor and has a big-end-up conical longitudinal section; the inclined pipe is communicated with the mixing buffer area, the bottom end of the inclined pipe is inclined downwards to mix the heavy-particle catalyst and the light-particle catalyst and send the mixture to the bottom of the mixing buffer area, and under the action of lifting gas, the heavy-particle catalyst and the ligh