Recycling apparatus of used bituminous conglomerate and an airtight support device for rotating cylinders

A recycling apparatus of bituminous conglomerate, which is used, crushed and deriving from removal of one or more layers of a road surface comprising:

• a rotating cylinder comprising:
• a first rotation axis, which is longitudinal, a first wall which is tubular and which internally at least partially defines a mixing and drying chamber, which is rotating;
• a plurality of mixing elements for remixing bituminous conglomerate, which is used, crushed and deriving from removal of one or more layers of a road surface, when it is fed into the mixing and drying chamber;
• and a rotation device for rotating at least the mixing and drying chamber about the first rotation axis;
• a burner having a relative flame portion which is situated internally of the mixing and drying chamber, at a first side thereof;
• a conveying device of gaseous substances predisposed to be able to convey at least a part of the gaseous substances present in the mixing and drying chamber externally on the first wall, in order, when, the burner is activated, to heat it externally;
• wherein the rotating cylinder further comprises a second wall, which is external, tubular and arranged externally of the first wall and which, together with the first wall, defines a first air space air space, which is tubular and hydraulically connectable to an aspirating device and wherein the conveying device of gaseous substances is solidly constrained to the rotating cylinder and internally of the mixing and drying chamber on a second side thereof opposite the relative first side, the conveying device in turn comprising:
• a third wall which is tubular and surrounds the first rotation axis and has a relative external surface;
• a first plurality of first through-holes arranged along a first section of the third wall perpendicular to the first rotation axis, a fourth wall which is tubular and arranged externally and solidly to the third wall and having a relative inner surface;
• a plurality of second through-holes corresponding to the first plurality of first through-holes and arranged along a second section of the fourth wall perpendicular to the first rotation axis, a plurality of linking elements corresponding to the first plurality of first through-holes, wherein each linking element of the plurality of linking elements comprises a second air space, which originates from a different first through-hole of the plurality of first through-holes and terminates in a different second through-hole of the second plurality of through-holes, hydraulically connecting only the relative first through-hole to the relative second through-hole, wherein the plurality of linking elements is conformed so as to define, externally and together with the external surface of the third wall, the inner surface of the fourth wall, a plurality of channels through which a mixture of aggregates and bitumen can be conveyed in an advancement direction substantially parallel to the first rotation axis;
• and wherein the plurality of second through-holes is in hydraulic connection with the first air space;
• for, when;
• the first air space is hydraulically connected to an aspirating device;
• the burner is activated and bituminous conglomerate, which is used, crushed and deriving from removal of one or more layers of a road surface, is fed into the mixing and drying chamber;
• conveying, into the first air space, the hot gaseous substances from the mixing and drying chamber through the first plurality of first through-holes, the second plurality of second gaps and the second plurality of second through-holes externally heating the first wall of the mixing and drying chamber;
• and
• optionally, an aspirating device, externally fixed to the rotating cylinder distally to the conveying device of gaseous substances, wherein the aspirating device is fixed with respect to the first rotation axis, and wherein the aspirating device is hydraulically connected at least to the first air space.