Mill door in coal-burning utility electrical power generation plant
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United States of America Patent
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-
Feb 20, 2001
Grant Date -
N/A
app pub date -
May 20, 1999
filing date -
May 20, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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