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US 5,341,576 AGranted
Method and apparatus for drying granular materials
AssigneeMatsui Manufacturing Co., Ltd.
InventorsOno Tsutomu, Nosaka Masaaki
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AssigneeMatsui Manufacturing Co., Ltd.
InventorsOno Tsutomu, Nosaka Masaaki
Estimating the term…
The present invention discloses a method and an apparatus for drying granular materials by submitting them to dielectric heating by means of electromagnetic waves such as microwave, high frequency, etc. The granular materials to be dried are heated to the prescribed temperature with electromagnetic waves under a reduced pressure of a range not producing any glow discharge and then dried to the prescribed moisture percentage while passing through a pressure reducing process of a vacuum of higher degree. An apparatus for it is provided with a reduced pressure drying tank (1) having an electromagnetic wave generator (2), a main drying tank (30) communicated with said reduced pressure drying tank (1), and suction air sources (20), (20') which are provided respectively in the reduced pressure drying tank (1) and the main drying tank (30).
A method for drying granular materials intended to dry the granular materials to be dried through a heating process which heats the granular materials with electromagnetic waves under a reduced pressure lower than the atmospheric pressure and a pressure reducing process which performs final drying by producing a vacuum of a higher degree compared with the state of pressure reduction in said heating process in the absence of electromagnetic waves.
An apparatus for drying granular materials comprising:
Dependencies are inferred from the claim text.