Coke control reactor, and device and method for preparing low-carbon olefins from oxygen-containing compound

A coke control reactor, wherein the coke control reactor comprises a coke control reactor shell, a first reaction zone, and a coke controlled catalyst settling zone;

• the coke control reactor shell comprises an upper coke control reactor shell and a lower coke control reactor shell;
• the upper coke control reactor shell encloses the coke controlled catalyst settling zone;
• the lower coke control reactor shell encloses the first reaction zone;
• the first reaction zone communicates with the coke controlled catalyst settling zone;
• a cross-sectional area at any position of the first reaction zone is less than a cross-sectional area at any position of the coke controlled catalyst settling zone;
• n baffles are arranged in a vertical direction in the first reaction zone, bottoms of the n baffles are connected to a bottom of the coke control reactor, tops of the n baffles are located in the coke controlled catalyst settling zone, and the n baffles divide the first reaction zone into m subzones of the first reaction zone, wherein m and n are both integers;
• and
• a catalyst circulation hole is formed in each of the n baffles, such that a catalyst flows in the first reaction zone.