Abstract: A furnace body for a drum roaster. The drum roaster is a part of a combustion arrangement. The combustion arrangement is for a combustion gas for heating a supply air. At least one combustion flame is guided in the combustion arrangement. A hydrogen-air mixture is provided as the combustion gas. The furnace body includes a hollow cylinder arrangement which is arranged to enclose a combustion chamber. The hollow cylinder arrangement has a first base surface, a second base surface, and at least one single-walled hollow cylinder. The second base surface is open to discharge heating air. The combustion arrangement is arranged in the hollow cylinder arrangement. The combustion arrangement has a burner pad and an ignition device. A combustion gas supply is fluidically connected to the first base surface.

Abstract: A color monitoring arrangement includes a light sender, a light guide arrangement with a light guide which forwards a light beam emitted by the light sender to illuminate a product, and a light guide which forwards light reflected by the product to a light receiver, an optical device which applies the light beam to the product and the reflected light into the light guide arrangement, an evaluation unit which defines a color value for the product, and a measuring probe with first opening and a second opening opposite thereto. The color value is based on a quotient of reflection measurements of a light intensity of the light beam to a light intensity of the reflected light for two light wavelengths. The light guide arrangement is guided into the first opening into the measuring probe, and the optical device is arranged at the second opening of the measuring probe.

Abstract: A drum roaster for roasting beans. The drum roaster includes a housing assembly in which a roasting drum for receiving the beans is rotatably supported, a drive device for rotating the roasting drum, and a heating assembly for heating the beans at least via a heating air. The heating assembly includes an electric heating element for heating a feed air, a suction fan for extracting the heating air out of the roasting drum, and a feed air fan to supply the feed air. The electric heating element is arranged in a heating tube upstream of the roasting drum as seen in a flow direction of the heating air. The suction fan is arranged downstream of the roasting drum as seen in the flow direction of the heating air. The feed air fan is arranged upstream of the electric heating element as seen in a flow direction of the feed air.

Abstract: A cooling arrangement for a roasted vegetable bulk material. The cooling arrangement includes a cooling chamber for cooling the roasted vegetable bulk material. The cooling chamber has a bulk material receiving surface and a sensor arrangement having at least one temperature sensor which monitors a temperature of the roasted vegetable bulk material.

Abstract: A color monitoring arrangement includes a light sender, a light guide arrangement with a light guide which forwards a light beam emitted by the light sender to illuminate a product, and a light guide which forwards light reflected by the product to a light receiver, an optical device which applies the light beam to the product and the reflected light into the light guide arrangement, an evaluation unit which defines a color value for the product, and a measuring probe with first opening and a second opening opposite thereto. The color value is based on a quotient of reflection measurements of a light intensity of the light beam to a light intensity of the reflected light for two light wavelengths. The light guide arrangement is guided into the first opening into the measuring probe, and the optical device is arranged at the second opening of the measuring probe.