Exhauster inlet venturi

Details Exhauster inlet venturi Exhauster inlet venturi

1993-08-24

1994-11-15

Favors, Edward G.

Furnaces

Fuel feeders

Blower

110232, 241 48, 241 56, F23K 100

Patent

active

053637763

ABSTRACT:
An inlet venturi for coal-side exhauster fan structure used to deliver pulverized coal to a combustion chamber. Generally, the inlet venturi has an axial length comparable to that of the exhauster fan inlet, resulting in a shallow, smooth transition angle from the venturi to whizzer ring or similar structure for guiding the coal flow into the center of the fan assembly. The inlet venturi includes a back plate or collar portion which prevents eddy effects and pressure drop between the venturi throat and the exhauster fan inlet, and further serves to accurately position the venturi in the exhauster fan inlet. The inventive inlet venturi structure additionally permits the removal of some or all of the "whizzer" structure commonly used on such fans, resulting in substantial savings in power needed to drive the fan.

REFERENCES:
patent: 3767045 (1973-10-01), Voelskow
patent: 3770124 (1973-11-01), Frangquist
patent: 4454825 (1984-06-01), Musto
patent: 4478157 (1984-10-01), Musto
patent: 4637556 (1987-01-01), Dunn

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