Uniform bulk Material Processing using Multimode Microwave Radiation

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Description

An apparatus for generating uniform heating in material contained in a cylindrical vessel is described. TE{sub 10}-mode microwave radiation is coupled into a cylindrical microwave transition such that microwave radiation having TE{sub 11}-, TE{sub 01}- and TM{sub 01}-cylindrical modes is excited therein. By adjusting the intensities of these modes, substantially uniform heating of materials contained in a cylindrical drum which is coupled to the microwave transition through a rotatable choke can be achieved. The use of a poor microwave absorbing insulating cylindrical insert, such as aluminum oxide, for separating the material in the container from the container walls and for ... continued below

Physical Description

25 p.

Creation Information

Varma, Ravi & Vaughan, Worth E. June 18, 1999.

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Description

An apparatus for generating uniform heating in material contained in a cylindrical vessel is described. TE{sub 10}-mode microwave radiation is coupled into a cylindrical microwave transition such that microwave radiation having TE{sub 11}-, TE{sub 01}- and TM{sub 01}-cylindrical modes is excited therein. By adjusting the intensities of these modes, substantially uniform heating of materials contained in a cylindrical drum which is coupled to the microwave transition through a rotatable choke can be achieved. The use of a poor microwave absorbing insulating cylindrical insert, such as aluminum oxide, for separating the material in the container from the container walls and for providing a volume through which air is circulated is expected to maintain the container walls at room temperature. The use of layer of highly microwave absorbing material, such as SiC, inside of the insulating insert and facing the material to be heated is calculated to improve the heating pattern of the present apparatus.

Physical Description

25 p.

Notes

OSTI as DE00784413

Medium: P; Size: 25 pages

Source

  • Patent File Date: 1999 Jun 18

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  • Report No.: PATENTS-US--A9336047
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 784413
  • Archival Resource Key: ark:/67531/metadc723325

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • June 18, 1999

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

Description Last Updated

  • April 10, 2017, 6:23 p.m.

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Varma, Ravi & Vaughan, Worth E. Uniform bulk Material Processing using Multimode Microwave Radiation, patent, June 18, 1999; New Mexico. (digital.library.unt.edu/ark:/67531/metadc723325/: accessed August 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.