Device and process for drying moving webs of material
OwnerKlaus Gissing, Rodney Smithinventors
Life of this patent
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Abstract
A drying device for moving webs of material has at least two serial drying groups each having a plurality of heatable drying cylinders. The drying cylinders of at least one first drying group are steam-heated in a first heat circuit. The drying cylinders of at least one second drying group have supply piping for a combustible energy source and discharge piping for waste heat originating from the combustion. A first heat exchanger is provided that couples the first heat circuit for the steam-heated drying cylinders to the discharge piping for the waste heat from the drying cylinders of the second drying group.
Claims18
-10. (canceled)
A drying device for moving webs of material comprising at least two drying groups each having a plurality of heatable drying cylinders, wherein
- the drying cylinders of at least one first drying group are steam-heated drying cylinders;
- a first heat circuit is provided for the steam;
- the drying cylinders of at least one second drying group have supply piping for a combustible energy source and discharge piping for waste heat originating from combustion of the energy source;
- and
- a first heat exchanger is provided that couples the first heat circuit for the steam from the steam-heated drying cylinders of the at least one first drying group to the discharge piping for the waste heat from the drying cylinders of the at least one second drying group.
Process for drying moving webs of material with at least two drying groups each having a plurality of heatable drying cylinders, comprising:
- heating the drying cylinders of at least one first drying group with steam carried in a first heat circuit;
- heating the drying cylinders of at least one second drying group with a combustible energy source that produces waste heat from the second drying group;
- delivering at least some said waste heat to the first heat circuit.
Dependencies are inferred from the claim text.