Device for continuous drying of material
OwnerArmin Vonploninventor
Life of this patent
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Abstract
The invention relates to a device for device for continuous drying of material, particularly sewage sludge, which has a belt 2, particularly a filter belt, on which the material is conveyed. It is characterised by a distribution screw 4 being mounted above the belt 2, particularly filter belt, at the inlet in order to feed the material onto the belt 2, particularly filter belt. In addition, the invention relates to a process for drying material, particularly sewage sludge, where the material is conveyed on a belt 2, particularly a filter belt, through a dryer 1, which process is characterised by the material being fed in through a distribution screw 4, where the level can be changed by altering the belt speed.
Claims28
A device for continuous drying of material comprising:
- a belt for conveying said material in a conveying direction through a dryer, said belt having an inlet end;
- a distribution screw mounted above the belt proximate the inlet end so that the screw rotation axis is transverse to the conveying direction, for substantially evenly distributing the material onto the belt;
- and
- a rotating calibrating roll mounted above the belt at a down stream position from the distribution screw, wherein the calibrating roll is height-adjustable.
A device for continuous drying of material comprising:
- a belt for conveying material in a conveying direction through a dryer, said belt having an inlet end;
- a distribution screw mounted above the belt proximate the inlet end so that the screw rotation axis is transverse to the conveying direction, for substantially evenly distributing the material onto the belt;
- wherein the distribution screw is connected to a mixer for mixing a backfeed material and a fresh material.
A device for continuous drying of material comprising:
- a belt for conveying material in a conveying direction through a dryer, said belt having an inlet end;
- a distribution screw mounted above the belt proximate the inlet end so that the screw rotation axis is transverse to the conveying direction, for substantially evenly distributing the material onto the belt;
- a dryer having a dryer hood mounted over the belt, said dryer hood extending over the entire belt and the distribution screw;
- wherein the dryer has feed ducts that extend along both sides of the dryer hood, and openings for the drying gas to escape.
A device for continuous drying of sewage sludge material comprising:
- a drying hood;
- a belt for conveying the material in a conveying direction through the drying hood, said belt having an inlet end;
- and
- material distribution means located above the belt proximate the inlet end, for receiving material to be dried and distributing the material at a substantially constant rate across the belt;
- wherein the material distribution means includes a distribution screw having a rotation axis oriented transversely to the belt conveying direction, and means for rotating the screw at a constant speed.
A process for drying sewage sludge material comprising the steps of:
- conveying the material on a belt driven at a given speed through a dryer;
- feeding the material to a distribution screw located over an inlet end of the belt;
- distributing the material onto the inlet end of the belt with the distribution screw as a layer of material to be dried, having a substantially even level across the belt;
- and
- in response to measurement of a process variable, changing the level of the material on the belt by altering the belt speed.
Dependencies are inferred from the claim text.