F - Mech Eng,Light,Heat,Weapons – 23 – K
Patent
F - Mech Eng,Light,Heat,Weapons
23
K
110/28
F23K 1/00 (2006.01) F23D 1/00 (2006.01)
Patent
CA 1204026
A MILL RECIRCULATION SYSTEM ABSTRACT OF THE DISCLOSURE A mill recirculation system (10, 40) that is operative for purposes of effecting the pulverization and firing of solid fuels, while yet possessing all of the desirable features of a direct fired system. The subject system (10, 40) includes pulverizer means (14, 48), classifier means (12, 44) and burner means (16, 68) as well as a preestablished fluid flow path by which the pulverizer means (14, 48) and the classifier means (12, 44) are interconnected in fluid flow relation with the burner means (16, 68). In accord with the mode of operation of the subject mill recirculation system (10, 40) a stream of solid fuel is made to flow along the fluid flow path such that the solid fuel is pulverized in the pulverizer means (14, 48), classified according to particle size in the classifier means (12, 44) and fired in the burner means (16, 68). Further, a stream of a suitable gaseous medium is made to flow along the flow path such that the gaseous medium is operative to cause the solid fuel to be conveyed therewith through the pulverizer means (14, 48) while being dried thereby and to be conveyed therewith from the pulverizer means (14, 48) to the classifier means (12, 44). At the classifier means (12, 44) a separation is had of the stream of the gaseous medium such that a portion of the gaseous medium is recirculated along with the oversize solid fuel particles back to the pulverizer means (14, 48) while the remainder of the gaseous medium is operative to convey the solid fuel particles that are of the desired size from the classifier means (12, 44) to the burner means (16, 68) for burning, i.e., firing, in the latter.
433600
Alstom Power Inc.
Smart & Biggar
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