Title:
METHOD AND APPARATUS FOR DRYING LOW GRADE COAL
Document Type and Number:
Japanese Patent JPS61250096
Kind Code:
A
Abstract:
A method and apparatus for drying of low-rank coals, such as lignite, where the coal is passed through a sealed vessel in a plurality of heated fluidized beds with fluidization effected by superheated steam flowing counter-current to the flow of coal. A composite steam is exhausted from the sealed vessel, partially condensed, to remove an amount of water about equal to that removed from the coal, and the steam reheated and recycled to the sealed vessel. The heating of the fluidized beds is by means of heat exchange tubes passing through the beds, with a fluid, such as methanol, heated for flow through the tubes, collected and in a cooled state used in the partial condenser, and then compressed to reheat the same for reuse in the heat exchange tubes.
Inventors:
ROBAATO DOREIPAA
ROBAATO UENDERU UORUFUE
ROBAATO UENDERU UORUFUE
Application Number:
JP9779886A
Publication Date:
November 07, 1986
Filing Date:
April 25, 1986
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
International Classes:
C10F5/00; C10L9/08; F26B3/08; F26B3/084; F26B17/10; F26B21/04; F26B23/00; (IPC1-7): C10L9/08; F26B3/08
Attorney, Agent or Firm:
Koichiro Kato
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