Method and apparatus for heating a roller
AssigneeVoith Patent GmbH
InventorFabian Döling
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for heating a roller used in the production and/or finishing of a web of material, particularly a paper web or paperboard web, are provided. According to the method, a roller is heated from the outside by a heated gas. The apparatus is configured to heat a roller used in the production and/or finishing of a web of material according to the method.
Claims47
A method for heating a roller used in at least one of a production and finishing of a web of material, comprising heating the roller from the outside by a heated gas mixture,
- wherein a mixture of fuel and air is fed to at least one mixing element upstream or downstream of at least one burner;
- and
- wherein said burner is arranged in an air-moving chamber.
A method for heating a roller, the method comprising:
- heating a first gas in a first axial zone;
- directing the first gas toward the roller to achieve a first surface temperature;
- heating a second gas in a second axial zone;
- and
- directing the second gas toward the roller to achieve a second surface temperature,
- wherein the first axial zone and the second axial zone are located exterior to the roller and along distinct axial locations adjacent the roller and at least one of the first gas and the second gas is mixed with air in at least one mixing element.
An apparatus for heating a roller, the apparatus comprising:
- a first axial zone for heating a first gas;
- a first exit zone defining a portion of the first axial zone;
- a second axial zone for heating a second gas;
- a second exit zone defining a portion of the second axial zone;
- and
- at least one mixing element for at least one of the first gas and the second gas, and air,
- wherein the first and second exit zones are located exterior to the roller and define distinct axial locations along the roller.
Dependencies are inferred from the claim text.