Density separator for waste material

A density separator for waste material, comprising:

• a tank (1) for receiving waste material and intended for containing a fluid to separate waste material by density into floating waste material and settled waste material;
• automatic feed means (18, 37) to feed waste material to the tank (1);
• motorised conveyor belts (3, 4), each one with a chassis (5) and a conveyor belt (6), to remove waste material from the tank (1);
• and comprising:
• a floating waste material conveyor (3) to extract floating waste material from the surface of the water;
• and
• a settled waste material conveyor (4) to extract settled waste material from the bottom of the tank (1);
• characterised in that it additionally comprises a blower-type sorting device (21), comprising:
• an air turbine (22) that provides an airflow;
• a duct (23) which receives the airflow from the turbine (22) and branches into a riser duct (26) and a discharge duct (27);
• and
• a diffuser (39) located below the automatic feed means (18, 37) and communicated with the riser duct (26) to receive a first part of the airflow of the turbine (22) and cause air to be expelled in the vertical or inclined direction, which raises more light-weight waste material (bags, PET bottles, papers);
• where the discharge duct (27) transports a second part of the airflow, which causes air to be horizontally expelled to remove the light-weight waste material—once it is raised by means of the first flow—to a lateral pipe (28), preventing interferences with other heavier fractions of waste material.