Furnaces – Process – Burning pulverized fuel
Patent
1994-12-15
1996-10-01
Bennett, Henry A.
Furnaces
Process
Burning pulverized fuel
110260, 110104B, 239 11, 432 24, F23D 100
Patent
active
055603050
ABSTRACT:
A burner block for mounting a burner within a furnace containing a melt to be heated by the burner. The burner block comprises a body having a passageway terminating in a divergent opening. The passageway is configured to receive the burner so that the burner is recessed within the divergent opening and a flame produced by the burner is directed out of the divergent opening and over the melt. The divergent opening has a lower section angled in a downward direction and the lower section has a reversed step to produce a primary recirculation zone beneath the flame, thereby to draw the flame in a downward direction toward the melt. The reversed step is positioned within the divergent opening so that when the burner is in use, a secondary recirculation zone forms between the opening and the melt and further draws the flame in the downward direction toward the melt. The height of this secondary recirculation zone will vary with the height of the melt within the furnace to produce a self adjustment of the flame toward the melt. In another aspect, the present invention relates to a furnace incorporating the aforesaid burner block, a burner positioned within the burner block and a melt.
REFERENCES:
patent: 4313722 (1982-02-01), Yigdall
patent: 4986748 (1991-01-01), Brown et al.
patent: 5242110 (1993-09-01), Riley
patent: 5383782 (1995-01-01), Yap
patent: 5411394 (1995-05-01), Beer et al.
Bennett Henry A.
Cassett Larry R.
Rosenblum David M.
The BOC Group Inc.
Tinker Susanne C.
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