Abstract:
An apparatus for heat treating contaminated particulate material and more particularly, an apparatus for reclaiming foundry sand. The apparatus includes a heated, inclined rotary drum (3) and an auger (2) projects into the upstream end of the drum (3) and serves to feed material to the drum (3). The auger (2) includes a spiral flight (7) carried by a hollow shaft (8) and a blower (18) is connected to the outer end of the hollow shaft (8) so that air is supplied through the shaft (8) into the drum (3). A seal is provided between the non-rotating auger housing (9) and the drum (3), and the seal includes an annular bearing plate mounted on the end of the drum (3) while a sealing ring is connected to the auger housing (9) and is biased against the plate to provide a seal. The excess air in the heated drum (3) burns off the organic contaminates from the particulate material and calcines the mineral contaminates. The treated particulate material is transferred from the downstream end of the drum (3) to a second cooling drum (5) and air is passed through the second drum (5) countercurrently to movement of the particulate material to cool the material.
Abstract:
Dans un procédé de traitement de déchets, on mélange les déchets solides et/ou liquides avec un matériau agglomérant, on fait passer le mélange à travers une extrudeuse afin de former des boulettes de déchets, auxquelles on fait traverser une zone de pyrolyse dans un four ou un séchoir afin d'en extraire au moins une partie des gaz volatiles contenus dans les déchets, puis on leur fait traverser une zone d'oxydation dans le four ou le séchoir où l'oxygène en excès provoque l'oxydation des gaz volatiles restants et d'au moins une partie du carbone fixe contenu dans les déchets, puis on leur fait traverser une zone de vitrification dans le four ou le séchoir destiné à vitrifier les silicates présents dans les boulettes, afin de former un agrégat solide.
Abstract:
Material to be treated such as garbage is charged into a first rotary kiln 14 to be mainly dehydrated and charged into a second rotary kiln 18 to be carbonized. The first rotary kiln 14 has a first nozzle pipe 11 therein for spouting a first high temperature gas and the second rotary kiln 18 has a second nozzle pipe 15 for spouting a second high temperature gas, mainly high temperature superheated steam with a temperature higher than a temperature of the first high temperature gas. The carbonized material is discharged outside after a temperature thereof is lowered to prevent spontaneous combustion in an atmosphere. Thereby, it is able to provide an apparatus for thermal treatment using superheated steam which can be built relatively small and by which treatment time can be shortened, and further, the final carbonized material can be used as charcoal.
Abstract:
A rotary kiln incinerator (1) with a cylindrical structure in which a waste material introduced through one side of a furnace body (4) is combusted while being gradually transported to the other side of the furnace body by the rotation of the furnace body. The furnace body is obtained by aligning along a straight line a plurality of drums (D 1 to D 5 ) that have openings on the right and left sides and rotatably linking the openings of the adjacent drum. Internal temperatures of the drums are set to predetermined temperatures. Each drum is rotated by a rotation driving assembly (3a) installed on the outer periphery of the drum. Each of the rotation driving assembly is driven and controlled by a rotation control unit (3c) equipped with furnace temperature sensors each provided to the drum.
Abstract:
A method for the treatment of waste materials wherein solid and/or liquid wastes are mixed with a binding material; the mixture is passed through an extruder to form pellets of waste; the pellets pass through a pyrolysis zone in a furnace or kiln to drive off at least a portion of the volatile gases in the waste, the pellets are passed through an oxidation zone in the furnace or kiln where the excess oxygen causes the remaining volatile gases and at least a portion of the fixed carbon in the waste to be oxidized and the pellets are passed through a vitrification zone in the furnace or kiln to vitrify the silicates present in the pellets to form a solid aggregate.
Abstract:
One incinerator according to the invention characterized by that incinerator chambers (3) of cylinder inner shape set preferably at equal distance from rotatory axle (t1) in an outer casing (1) provided with thermal insulation (2) rotated around (t1) are realised as incinerator units, the longitudinal axle of the incinerator chambers (3) is parallel with the rotatory axle of the outer casing (1), and inside the incinerator chambers (3) incinerator carriages (21) are rolling preferably on a roller path (30) serving placing of the body to be incinerated. Further a door (18) ensuring placing of bodies is put on one of the front walls perpendicular to the rotatory axle (t1) of the casing (1), on the opposite wall the equipment is provided preferably with a blast inlet (15) and a hot air feed pipe (9), further one or more burner (13) are placed within the inside of the casing (1).
Abstract:
A device for the combustion of solid fuel in the form of granules, pellets, chips or other fragmented or finely divided form, comprising a rotary reactor drum (1), which forms the main combustion chamber (13) and has a rear end wall (65) and at the opposite end an outlet (3) for combustion gases to a boiler part for heat transfer to water-cooled surfaces, for example, or other heat-absorbing means, an inlet (55) for combustion air to the main combustion chamber (13), means (40) for feeding fuel through the rear end wall (65) of the reactor drum and means for rotating the reactor drum around its centre axis (2). Inside the main combustion chamber (13), in its rear part, is an inner, smaller drum (60), which is coaxial with the reactor drum (1) and has a perforated jacket. At least the bulk of the fuel is disposed to be fed into the inner, smaller drum (60) and from this to the surrounding main combustion chamber (13). The smaller drum (60) is disposed to be rotatable with the larger reactor drum (1) around its centre axis (2).
Abstract:
A device for combustion of granular material, for example wood flour pellets, chippings and the like, comprises a rotary solid fuel burner (1), air intake to the burner, at least one conduit (18) for the supply of fuel and outlet (3) for combustion gases to a boiler part for heat transfer to water-cooled surfaces, for example. The rotary solid fuel burner is formed as a vessel with a rear wall, said outlet (3) for combustion gases and a jacket part between the rear wall and the outlet. A fuel feed pipe (18), which forms part of a fuel feed conduit, extends through the rear end wall, and an air admission pipe (19) surrounds the central fuel feed pipe at a distance from this, so that a space (20) which is ring-shaped in section is formed between the central fuel feed pipe (18) and the air admission pipe (19). Air admission ducts (17b, 17a), which communicate with said ring-shaped space (20), extend in a radial direction out towards the jacket part and further along this a part of the way in the direction of the outlet for combustion gases, which ducts are provided along their extension with openings (10) for the introduction of combustion air from said ducts into a combustion chamber (13) in the burner.
Abstract:
A rotary kiln incinerator (1) with a cylindrical structure in which a waste material introduced through one side of a furnace body (4) is combusted while being gradually transported to the other side of the furnace body by the rotation of the furnace body. The furnace body is obtained by aligning along a straight line a plurality of drums (D 1 to D 5 ) that have openings on the right and left sides and rotatably linking the openings of the adjacent drum. Internal temperatures of the drums are set to predetermined temperatures. Each drum is rotated by a rotation driving assembly (3a) installed on the outer periphery of the drum. Each of the rotation driving assembly is driven and controlled by a rotation control unit (3c) equipped with furnace temperature sensors each provided to the drum.