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US 6,189,819 B1Granted
Mill door in coal-burning utility electrical power generation plant
AssigneeWisconsin Electric Power Company (WEPCO)
InventorDavid G. Racine
Life of this patent
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AssigneeWisconsin Electric Power Company (WEPCO)
InventorDavid G. Racine
Estimating the term…
A mill in a coal-burning utility electrical power generation plant has a rotary drum for pulverizing coal, and has a mill head at an axial end thereof. A stationary divider plate divides the mill head into an entrance receiving coal, and an exit discharging pulverized coal dust. An openable door on the mill head is moveable between a closed position and an open position. The door in the closed position is intersected by the rotational axis of the drum and has a lateral dimension transverse to such axis and greater than the inner diameter of the mill head. The door in the closed position spans the divider plate and closes both the entrance and exit of the mill head. The door in the open position exposes both the entrance and the exit. The divider plate may be removed by withdrawing it axially through the door opening without cutting the divider plate into multiple sub-pieces.
In a mill in a coal-burning utility electrical power generation plant, said mill comprising a rotary drum for pulverizing coal, said drum being rotational about an axis and having a mill head at an axial end thereof, said mill head having an inner diameter bisected by said axis, a stationary divider plate dividing said mill head into an entrance receiving coal, and an exit discharging pulverized coal dust, an openable door on said mill head and moveable between a closed position and an open position, said door in said closed position being intersected by said axis and having a lateral dimension transverse to said axis and greater than said inner diameter.
A mill for a coal-burning utility electrical power generation plant comprising a rotary drum for pulverizing coal, said drum being rotational about an axis and having a mill head at an axial end thereof, said mill head having an inner diameter bisected by axis, a stationary divider plate dividing said mill head into an entrance receiving coal, and an exit discharging pulverizing coal dust, an openable door on said mill head and moveable between a closed position and an open position, said door in said closed position being intersected by said axis and having a lateral dimension transverse to said axis and greater than said inner diameter, said divider plate extending along a lateral dimension transverse to said axis and also transverse to said lateral dimension of said door.
Dependencies are inferred from the claim text.