Device for the transport of materials and electrostatic precipitation

Device for transporting materials which has at least a first pipe (I) and a second pipe (II), each having a six-cornered, honeycomb-shaped flow cross section, the first pipe (I) having two or three first wall parts (1) which are not arranged adjacent to one another and whose longitudinal edges (1') are arranged at a first distance (a) from the connection point (3) between the first wall part (1) and the adjacent second wall part (2), said connection point (3) is nearest to the longitudinal edge (1'), and plate-shaped brackets (4) are arranged at the sides of the first wall parts (1) remote from the materials to be transported at a second distance (c) from the nearest longitudinal edges (1') and are inclined toward the nearest longitudinal edges (1'), the angle (.alpha.) of inclination between the plane of the bracket (4) and the plane of the first wall part (1) is 60.degree., and the second pipe (II) has at least one corresponding first wall part (1) which is arranged parallel to the second wall part (2) of the first pipe (I), the surfaces of the brackets (4) of the first wall part (1) of the second pipe (II) which form the side of the angle (.alpha.) of inclination contact a portion of the nearest first wall part (1) of the first pipe (I).