Fluidized bed reactor and method for recovering active metal of lithium secondary battery utilizing same

A fluidized bed reactor, comprising:

• a reactor body;
• and
• a dispersion plate coupled to a bottom portion of the reactor body, the dispersion plate comprising a base plate and injection columns protruding from a top surface of the base plate;
• wherein the injection columns comprise:
• first injection columns arranged at a central portion of the dispersion plate;
• and
• second injection columns arranged at a peripheral portion of the dispersion plate, the second injection columns having a greater height than a height of the first injection columns,
• wherein the first injection column comprises a first column body extending from the top surface of the base plate, a first cap portion covering an upper portion of the first column body, and a first injection hole penetrating through the first column body, and
• the second injection column comprises a second column body extending from the top surface of the base plate, a second cap portion covering an upper portion of the second column body, and a second injection hole penetrating through the second column body,
• wherein the second injection hole comprises an upper injection hole and a lower injection hole, and a height of the upper injection hole is greater than a height of the first injection hole,
• wherein the upper injection hole is inclined toward the base plate, and the lower injection hole is inclined from the base plate toward a top portion of the reactor body.