| 摘要 |
Provided is an externally heated carbonization furnace (2) which comprises a plurality of rotary kilns (5, 7) connected in series each of which includes an outer casing (10), a kiln inner casing (6, 8) which rotates relative to the outer casing (10), and a heater (21) which supplies heated gas between the outer casing (10) and the kiln inner casing (6, 8), and which further comprises a drive device (16) which rotates at least one of the kiln inner casings (6) and the kiln inner casing (8) differing from the at least one of the kiln inner casings (6) and a control device (15) which controls the drive device (16) by water content of a treated object in the kiln inner casing (6, 8). |
