subject: Continous Vacuum Dryer [print this page] An improved apparatus for supplying materials, useful for belt type continuous vacuum dryer, is provided which comprises an inner cylinder equipped with a material-supplying duct fixed onto one end thereof, a distributing chamber formed inside the cylinder and communicating with the duct and a plurality of distributing nozzles fixed thereto; an outer cylinder having the inner cylinder rotatably inserted thereinto and having a plurality of distributing nozzles provided at the opposed locations to the former distributing nozzles; a screw feeder provided in freely rotatable manner inside the distributing chamber; and a driving mechanism for rotating the outer cylinder.According to this apparatus, it is possible to supply materials on a moving belt, continuously and uniformly over the whole surface of the belt.
his invention relates to an apparatus for supplying materials, employed when materials, particularly those having high heat sensitivity material such as foods, chemicals, etc., are supplied onto a belt continuously moving inside a vacuum dryer and dried.
In order to prevent materials as mentioned above from denaturation by heat, it has been thought of to lower the vaporization temperature of the water contained therein, and thus a vacuum drying process has been employed.
Such a process has been usually carried out by passing a belt through a vacuum dryer. A degree of vacuum in the range of 1 to 100 Torr has been employed although it varies depending on the materials.
As what is to be particularly stressed in this case, the state of the materials distributed on the belt is mentioned. Namely, materials should be supplied onto the belt continuously, in a definite amount and in a uniform thickness. If thissupplying state fluctuates, the balance between the materials and the heat quantity supplied is destroyed, resulting in heat denaturation of the materials or inferior dried products having an uneven water content.
by: ericfu
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