Chute dryer with special air-roof assembly
AssigneeSchmidt-Seeger GmbH
InventorsFranz Wiesmeier, Andreas Ehrhardt
Life of this patent
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Abstract
A drying method is provided through a particular arrangement of air intake- and air exhaust roofs, wherein the particular material flows are not only impacted by intake air in an alternating manner from the left and from the right, but also an accumulation of air intake roofs and air exhaust roofs is avoided, which otherwise typically occurs at the separation plane between two chute modules, rotated relative to one another by 180°, which is performed for changing the side of the air impact. This method is advantageous in particular for drying parboiled rice.
Claims21
A bulk material dryer, comprising:
- a vertical dryer chute including plural modules placed above one another;
- and
- a plurality of air intake roofs and air exhaust roofs disposed inside the vertical dryer chute in parallel and horizontally aligned, wherein the air intake roofs and air exhaust roofs are disposed in plural planes above one another,
- wherein the roofs are disposed offset in face view in the planes, so that a rhomboid pattern with only diagonally extending gridlines is formed,
- wherein the air intake roofs and the air exhaust roofs are respectively disposed on diagonal lines,
- wherein only one type of the air intake roofs or the air exhaust roofs is disposed on the diagonal lines of one direction, and both types of the air intake roofs and the air exhaust roofs are disposed in an alternating manner on the diagonal lines of the other direction,
- wherein the air intake roofs and the air exhaust roofs of a particular type are arranged offset towards a same side in at least one plane relative to another of the air intake roofs or the air exhaust roofs of the same type disposed above, and
- wherein the offset is provided in a transversal direction by an additional offset which corresponds to a fraction of a material flow width.
A method for drying bulk material in a vertical dryer chute, in which a plurality air intake roofs and air exhaust roofs, are disposed, which extend transversally through the dryer chute, and wherein the bulk material moves towards a run out from the top to the bottom, and wherein the bulk material is divided by the air roofs into adjacent material flows, the air intake roofs and the air exhaust roofs of a particular type are arranged offset towards a same side in at least one plane relative to another of the air intake roofs or the air exhaust roofs of the same type disposed above, the offset is provided in a transversal direction by an additional offset which corresponds to a fraction of a material flow width,
- wherein the particular material flows are thus flowed through by drying air in an alternating manner from the right to the left, and from the left to the right on their path from the top to the bottom, and
- the drying air, which is supplied from the air intake roofs of a first horizontal plane is always supplied to air exhaust roofs, which are disposed in a second horizontal plane, located directly above or below the first horizontal plane, except in the uppermost or lowermost first horizontal plane.
A method for drying bulk material in a vertical dryer chute, in which a plurality air intake roofs and air exhaust roofs, are disposed, which extend transversally through the dryer chute, wherein the bulk material moves towards a run out from the top to the bottom, and wherein the bulk material is divided by the air roofs into adjacent material flows, the air intake roofs and the air exhaust roofs of a particular type are arranged offset towards a same side in at least one plane relative to another of the air intake roofs or the air exhaust roofs of the same type disposed above, the offset is provided in a transversal direction by an additional offset which corresponds to a fraction of a material flow width,
- wherein the material flows on their way downward are additionally divided once or several times, and the partial flows thus created are combined into a new material flow, and
- said flow partitioning and recombination is only caused by positioning the air roofs, which are provided.
Dependencies are inferred from the claim text.