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US 2025/0197530 A1Published application
Method and device for the digestion of starch
AssigneePga Putz-Granitzer-Anlagenbau Gesellschaft M.B.H.
InventorsChristian STIRN, Roman STEINDL, Klaus BARTELMUSS
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Abstract
With a method for digesting starch, an aqueous slurry of the starch is treated with steam in a cooking vessel and in this case exposed to shear forces, wherein the starch-containing slurry is heated to a temperature of between 85° C. and 110° C. in the cooking vessel by introducing steam, and the digestion step is implemented until the desired degree of digestion has been reached. Also described is a cooking vessel that can be used when the method for digesting starch is being carried out.
Claims16
A cooking vessel comprising:
- a container (40) with an interior;
- a cover (41) of the container (40);
- a line (50) emptying into the cover (41);
- a rotor (42) with a finned dispersing disk (44);
- a drain line provided in the cover (41);
- an hollow displacement element (60) with an outside surface at a distance from an inside surface of the container (40), the hollow displacement element (60) having an inner opening arranged coaxially to the rotor (42), the hollow displacement element being arranged below the rotor;
- stator sheets (61) provided in the interior of the container (40) and outside of the hollow displacement element (60), the stator sheets arranged as baffles;
- a steam feed line (62) which empties into the interior of the container (40);
- and
- a hollow ring (70), the hollow ring having openings for the discharge of steam, the openings being directed toward the rotor (42) for the discharge of the steam toward the rotor, the cooking vessel being configured for digesting starch, including the steps of:
- a) creating an aqueous slurry of powdery starch,
- b) introducing the slurry into the cooking vessel (4),
- c) treating the slurry in the cooking vessel (4) with steam, by:
- using the rotor with the finned dispersing disk to expose the slurry by mechanical action to shear forces that are created by the rotor with the finned dispersing disk, and implementing thermomechanical digestion by feeding steam from the openings of the hollow ring (70) and the hollow displacement element (60), arranged below the rotor, the openings being directed toward the rotor (42) for the discharge of the steam toward the rotor, in order to implement the thermomechanical digestion, and
- d) drawing off the starch, converted at least partially into paste, from the cooking vessel (4).
12 more elements
Dependencies are inferred from the claim text.