Title:
METHOD AND APPARATUS FOR DRYING LOW GRADE COAL
Document Type and Number:
Japanese Patent JPS61250098
Kind Code:
A
Abstract:
A method and apparatus for drying 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 countercurrent to the coal flow. A composite steam is exhausted from the sealed vessel and passed to a vessel where water is sprayed therein to cool the same and remove occluded solids. A first portion of the steam is then reheated and returned to the sealed vessel as fluidizing steam, while a second portion of the steam is heated and passed through heat exchange tubes in the sealed vessel to heat the fluidizing coal, with the second portion, after passage through the heat exchange tubes discharged from the system.
Inventors:
ROBAATO DOREIPAA
ROBAATO UENDERU UORUFUE
ROBAATO UENDERU UORUFUE
Application Number:
JP9780086A
Publication Date:
November 07, 1986
Filing Date:
April 25, 1986
Export Citation:
Assignee:
WESTINGHOUSE ELECTRIC CORP
International Classes:
F26B3/08; C10F5/00; C10L9/08; F26B3/084; (IPC1-7): C10L9/08; F26B3/08
Attorney, Agent or Firm:
Koichiro Kato
Previous Patent: METHOD AND APPARATUS FOR DRYING LOW GRADE COAL
Next Patent: LIQUID LUBRICANT FOR COLD FORGING
Next Patent: LIQUID LUBRICANT FOR COLD FORGING