Circulating fixed bed

The invention discloses a circulating fixed bed. The circulating fixed bed is used for circularly producing a carbon material and comprises a temperature control body, at least one temperature control section reactor and a controller, the reactor is at least partially located in the temperature control body, and the temperature control body controls the temperature of each temperature control section reactor; the reactor comprises a rotating body and pipes AB, the pipes AB comprise a pipe A and a pipe B, and the pipe A and the pipe B are arranged in a sleeving mode and move relatively; and the controller controls materials to enter the A pipe and the B pipe to react to generate a carbon material, the controller controls the rotating body to rotate to drive the A pipe to rotate relative to the B pipe so as to feed and discharge the material, and the A pipe forms different angles relative to the B pipe in cycles so as to achieve cyclic production of the carbon material. The problems of energy conservation, envi