INDIRECTLY HEATED ROTARY DRYER

摘要

[Problem] To provide an indirectly heated rotary dryer intended to reduce contact between articles for processing and heating tubes, to reduce the power required for rotation even when increasing the filling rate, and to conserve energy. [Solution] Four partitions (16), each extending along a center axis (C) of the interior space of a rotation tube (10), are positioned in vertical and horizontal directions at 90° intervals in the rotation tube (10), and in a cross-sectional view of the rotation tube (10), the four partitions (16) divide the interior space of the rotation tube (10) into four substantially fan-shaped small spaces (K), each extending along the center axis (C). Heating tubes (11) are arranged in three rows in the rotation tube (10) so as to each extend in parallel to the center axis (C) of the rotation tube (10). The heating tubes (11) supply heating steam, and through a heat exchange with articles for processing (H) in the rotation tube (10), the heating tubes (11) heat and dry the articles for processing (H).