Apparatus for charging solid fuel to rotary kilns
AssigneesCadence Chemical Resources, Inc., Ash Grove Cement Company
InventorsCharles D. Peterson, James R. Tutt, John Cody
Life of this patent
Estimating the term…
Abstract
An apparatus is provided for charging containerized fuel, particularly combustible hazardous waste homogenates, through a wall of a rotating kiln with minimal perturbation of mineral processing conditions. During kiln rotation fuel modules are loaded into the apparatus and charged into the kiln through a port in the kiln cylinder wall and onto the contained mineral bed. In a preferred embodiment the apparatus includes a device for actuating a port closure and a drop tube extending from the port into the kiln cylinder and positioned so that in-process mineral material does not contact the port closure during rotation of the kiln cylinder.
Claims16
An apparatus for charging a solid or containerized fuel comprising a combustible material through a wall of a rotating kiln cylinder containing a mineral material, said apparatus comprising:
- a port in the wall of the kiln cylinder, a drop tube extending from the port and into the kiln cylinder a distance greater than the maximum depth of mineral material in the cylinder,
- a closure for the port and means for actuating the closure between a port-opened position and a port-closed position at predetermined times during rotation of the kiln cylinder, said closure being sized relative to the port and positioned when in the port-closed position to allow clearance for air flow around the closure into the kiln;
- means for receiving the fuel and positioning same for passage through the port, and
- means for applying a force to said fuel sufficient to move said fuel from the receiving and positioning means through the port and drop tube and into the kiln cylinder.
An apparatus for charging solid or containerized fuel comprising a combustible material through a wall of a rotating kiln cylinder containing a mineral material, said apparatus comprising:
- a port in the wall of the kiln cylinder;
- a closure for said port and means for actuating the closure to open and close the port at predetermined times during rotation of the kiln cylinder, said closure being sized relative to the port and positioned so that when it is in the port-closed position, clearance is allowed for air flow into the kiln whereby said closure is cooled by the flow of air around said closure and through the port during kiln operation;
- a drop tube extending from the port into the kiln cylinder and positioned so that the mineral material will not contact the port closure during rotation of the kiln cylinder,
- means for receiving the fuel and positioning same for passage through the port, and
- means for applying a force to said fuel sufficient to move said fuel from the receiving and positioning means through the port and drop tube and into the kiln cylinder.
In an apparatus for feeding solid materials through a wall of a rotating kiln cylinder, said apparatus comprising a port in the wall of the kiln cylinder, a drop tube extending from the port and into the kiln cylinder, a biased closure for the port and means for actuating the closure between a port-opened position and a port-closed position at predetermined times during rotation of the kiln cylinder, the improvement which comprises sizing and positioning the closure relative to the port to allow clearance for air flow through the port around the closure into the kiln when the closure is in the port-closed position.
Dependencies are inferred from the claim text.