Cold regenerated catalyst circulation method and device therefor

A cycling method of cold regenerated catalyst, comprising a fluidized catalytic cracking process, wherein:

• a hydrocarbon raw material performs a contact reaction with a catalyst in a riser reactor having or not having a fluidized bed reactor, a reactant stream enters a settler to perform a separation of the catalyst and an oil gas, the separated spent catalyst is steam stripped by a steam stripping section, and enters a regenerator to be charring regenerated, and the regenerated catalyst after being cooled and/or without being cooled directly returns to the riser reactor to be circularly used, wherein:
• 1) the regenerator is provided with one, two or more catalyst coolers, for adjusting reaction temperatures of reaction zones of the riser reactors (and/or the fluidized bed reactors) that are individually connected, and/or adjusting the temperature of the regenerator, to maintain them at the optimum values;
• and each of the catalyst coolers is provided with one, two or more catalyst outlets, for transporting the cold regenerated catalyst to the reaction zones of the one, two or more riser reactors (and/or fluidized bed reactors) and/or for transporting the cold regenerated catalyst to the regenerator;
• 2) part of the regenerated catalyst from the regenerator is cooled by the catalyst cooler to 200-720° C., directly enters a pre-lift zone and/or the reaction zones of the riser reactor (and/or the reaction zones of the fluidized bed reactor) and/or mixes with another part of hot regenerated catalyst that has not been cooled to obtain a mixed regenerated catalyst with a temperature below the regenerator temperature, and enters a pre-lift zone and/or the reaction zones of the riser reactor (and/or the reaction zones of the fluidized bed reactor);
• or the cold regenerated catalyst and the hot regenerated catalyst individually directly enter pre-lift zones of the riser, are lifted by a pre-lift medium to reach an equilibrium temperature, enter the reaction zones of the riser reactor (and/or the reaction zones of the fluidized bed reactor) or without passing through the catalyst cooler directly enter a pre-lift zone and/or the reaction zones of the riser reactor (and/or the reaction zones of the fluidized bed reactor), to be circularly used;
• and
• each of the riser reactors is provided with one, two or more reaction zones having or not having a fluidized bed reactor, before the cold regenerated catalyst enters the riser reactor and/or the fluidized bed reactor a pre-riser and/or mixer is or is not provided, and a pre-lift medium transports the cold regenerated catalyst to the riser reactor (and/or the fluidized bed reactor);
• and
• 3) the bottom of each of the catalyst coolers is provided with at least one fluidized medium distributor, a fluidized medium mainly enters the catalyst cooler from the distributor, a range of a superficial gas velocity (a ratio of a volume flow rate of the fluidized medium to the cooler cross-section) is greater than 0-0.7 m/s, and the temperature of the cold regenerated catalyst is controlled mainly by adjusting a flow rate of the fluidized medium;
• and
• the regenerated catalyst that enters each of the catalyst coolers is a regenerated catalyst or a regenerated catalyst without completed regeneration with any carbon content, or is a spent catalyst or contact agent or coking particles with any carbon content.