An apparatus for transforming organic and inorganic solid urban waste into aggregates, comprising:
- an extruding machine connected to a reactor;
- wherein the extruding machine comprises an extrusion cylinder through which a piston circulates inside an extrusion cavity that defines an extrusion axis,
- the end of the extrusion cavity is hermetically connected to the reactor;
- the reactor is a drum with rotational symmetry whose longitudinal shaft is coupled by means of an opening, with the end of the extrusion cavity of the cylinder of the extruding machine;
- the longitudinal shaft of the reactor comprises a rotary shaft that is inserted into beds, which are arranged at the ends of the reactor;
- in said rotary shaft some steel blades are arranged;
- between the end of the steel blades and a wall or dome of the reactor there is a clearance, forming a boundary layer of the reactor,
- wherein the rotary shaft of the reactor and the steel blades are a rotor, said rotary shaft of the reactor being coupled with an electric motor able to rotate the rotor at a speed of 2900 rpm,
- and wherein the reactor has a discharge valve;
- wherein the apparatus is configured to receive a mixture of rejected material from solid waste and includes:
- a compression stage where the mixture is compressed by the piston of the extruding machine moving forward until it comes into contact with the steel blades of the reactor, which steel blades reject the mixture, propel the mixture to the interior of the extrusion cavity, and prevent the mixture from moving forward with the resulting increase of pressure
- a processing stage where:
- (a) the piston moves forward, to further compress the mixture and force the mixture to penetrate the boundary layer of the reactor, forming a perimeter film,
- (b) the rotary shaft enters into resonance, where the potential energy built up by the rotary shaft is released as an emission of a shock wave, subjecting the mixture that is inside the extrusion cavity to a violent stirring, and repeatedly compressing the mixture on the rotor which is in the boundary layer to pressure peaks produced by the vibration of the rotary shaft,
- (c) once the resonance phenomenon is finished, the pressure on the piston of the extruding machine is reduced, decompressing the mixture, and the compression of the mixture on the rotor is repeated until the rotary shaft enters into resonance once again and there is a new emission of shock waves, and
- (d) the resonance and decompression cycles are repeated until the temperature of the mixture reaches 85° C. to 98° C. to transform the mixture of organic and inorganic solid urban waste into aggregates;
- and
- the aggregates are discharged in a discharging stage.