Drying and gas or vapor contact with solids – Material treated by electromagnetic energy – Microwave energy
Patent
1991-06-25
1994-08-30
Gromada, Denise
Drying and gas or vapor contact with solids
Material treated by electromagnetic energy
Microwave energy
34412, 34 92, 34259, F26B 334
Patent
active
053415760
ABSTRACT:
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).
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patent: 4549053 (1985-10-01), Haugh
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patent: 4954681 (1990-09-01), Ishikawa et al.
patent: 4957434 (1990-09-01), Radomsky
Masaaki Nosaka
Tsutomu Ono
Gromada Denise
Matsui Manufacturing Co., Ltd.
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