VORRICHTUNG ZUR AUSDEHNUNG VON NAHRUNGSMITTELN ODER TABAK.

摘要

The expansion appts. is equipped with a prepn. vessel into which raw materials are supplied and which is open to the atmos.. The air inside this vessel is substd. by gaseous carbon dioxide from a liquefied carbon dioxide tank. The raw materials in the vessel are introduced by a screw conveyor disposed in the vessel into an impregnation vessel through a transfer pipeline and carbon dioxide having an impregnation pressure higher than the atmospheric pressure is supplied from the tank to fill the vessel. Booster mechanisms are disposed in the pipeline to raise the pressure of carbon dioxide surrounding the raw aterials when they are introduced fro the prepn. vessel into the impregnation vessel to substantially the same level as the internal pressure of the vessel while this internal pressure is being kept constant. The raw materials subjected to the impregnation treatment in the impregnation vessel are discharged by the screw conveyor disposed in the vessel into an air transfer pipeline in which the flow of a heating ediu is generated, through a discharge pipeline. Pressure redn. mechanisms are disposed in the discharge pipeline, to reduce the pressure of carbon dioxide surrounding the raw aterials to substantially the sae pressure inside the air transfer pipeline while keeping pressure in the impregnation vessel constant when the impregnated raw materials are discharged from the vessel to the pipeline.