Abstract

A circulating mill, comprising primary mills (47, 57) and secondary mills (49, 61), and first and second inner circulation pipes (48, 58, 52, 64). The first inner circulation pipes (48, 58) are connected to air outlets of the primary mills (47, 57) and inner circulation pipe interfaces (3, 11), and the second inner circulation pipes (52, 64) are connected to air outlets of the secondary mills (49, 61) and the inner circulation pipe interfaces (3, 11); the inner circulation pipe interfaces (3, 11) are located on a housing (1) of the primary mills (47, 57) or the secondary mills (49, 61), or located on feed pipes (56, 60) of which one end is connected to the air inlet of the housing (1); a kinetic energy recovery device is mounted in the feed pipes (56, 60), and the kinetic energy recovery device is connected to an impeller in the housing (1).

IPC Classes  ?

• B02C 13/288 - Ventilating, or influencing air circulation
• B02C 13/282 - Shape or inner surface of mill-housings
• B02C 21/00 - Disintegrating plant with or without drying of the material
• B02C 23/28 - Passing gas through crushing or disintegrating zone gas moving means being integral with, or attached to, crushing or disintegrating element
• F26B 3/084 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed
• F26B 21/02 - Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
• F26B 25/22 - Controlling the drying process in dependence on liquid content of solid materials or objects