Title:
COMBUSTION APPARATUS FOR COAL
Document Type and Number:
Japanese Patent JPS59210212
Kind Code:
A
Abstract:
A system for pulverizing coal to be burned in a furnace (20), where nearly all of the coarse ash particles are removed from the coal prior to its introduction to the furnace. The system includes a pulverizing mill (10) having a first classifier (12) in its outlet for separating some of the large, heavy particles and returning them to the pulverizer. A second classifier (16) is connected to the first classifier, and includes a curved duct (16) wherein the solid particles being carried in an airstream are thrown outwardly against an outer wall. A skimmer blade (78) extending through the outer wall skims off a percentage of the large, heavy particles, the percentage depending on how much coarse ash the coal stream contains. The rest of the coal particles are conveyed to a furnace and burned therein. The separated large, heavy particles are passed through an ionizer (30) and then through an electrostatic separator (34), where the inorganic particles are separated from the coal particles. The coal particles can then be conveyed to the furnace or sent back to the pulverizer for further grinding.
Inventors:
TOTSUDO DEEBITSUDO HEREUERU
Application Number:
JP9577484A
Publication Date:
November 28, 1984
Filing Date:
May 15, 1984
Export Citation:
Assignee:
COMBUSTION ENG
International Classes:
B02C21/00; B02C23/14; B03B9/00; B03C7/00; B07B9/00; F23K1/00; B02C15/00; (IPC1-7): B02C21/00; F23K1/00
Attorney, Agent or Firm:
Kimura Masami
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