Method and apparatus for treating bulk material
OwnerWalter Haueter, Hans-Ulrich Pfaffhauser +1inventors
InventorsWalter Haueter, Hans-Ulrich Pfaffhauser, Karl Benz
Life of this patent
Estimating the term…
Abstract
For the uniform treatment of bulk material by means of a gas the bulk material is fluidized in a rotating container (101) in order to be mixed by the rotation thereof. In the case of heating the bulk material the rotation of the container is expediently interrupted at periodic intervals. A transport device is preferably provided in the interior of this container, in particular in the form of a worm or screw flight (20) of irregular pitch--related to one rotation in order to be able to precisely determine the dwell time through the mechanical transport. This screw (20) is preferably constructed as a two-start screw (FIG. 6).
Claims41
A method for treating bulk material by means of a gas, the method comprising the steps of
- introducing the bulk material to be treated into a container having at least one wall being at least partially perforated;
- causing the gas to flow through the at least partially perforated wall of the container to provoke a fluidisation of the material;
- rotating the container about an axis.
Apparatus for treating bulk material by means of a gas, the apparatus comprising:
- wall means forming a container of a cross-section which deviates from a circular cross-sectional shape and has a geometrical axis, said wall means being perforated at least in part;
- drive means for rotating said container about its axis;
- supply and discharge means for allowing material to be supplied into said container and to be discharged from it;
- gas supply and discharge means to conduct said gas through said wall means perforated at least in part, said gas supply and discharge means being dimensioned with respect to pressure and speed of gas flow as to fluidize said material within said container.
Apparatus for treating bulk material by means of a gas, the apparatus comprising:
- wall means forming a container of a cross-section which deviates from a circular cross-sectional shape, said wall means being perforated at least in part;
- supply and discharge means for allowing material to be supplied into said container and to be discharged from it;
- gas supply and discharge means to conduct said gas through said wall means perforated at least in part, said gas supply and discharge means being dimensioned with respect to pressure and speed of gas flow as to fluidize said material within said container;
- transport means for the bulk material provided in the interior of the rotatable fluidisation container;
- and
- wherein the transport means is formed as a two-start worm screw.
Dependencies are inferred from the claim text.