Solid material comminution or disintegration – Apparatus – Combined or convertible
Patent
1999-05-20
2000-09-19
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Combined or convertible
241179, 241299, 277903, B02C 1718
Patent
active
061199699
ABSTRACT:
A coal-burning utility electrical power generation plant includes a mill provided by a rotary drum for pulverizing coal. The drum is rotational about an axis and has mill heads at distally opposite axial ends thereof. Each mill head has a cylindrical mill head extension extending axially, and a stationary cylindrical seal ring concentric with the mill head extension and defining an annular gap therebetween. A pair of axially spaced annular seals are provided between the mill head extension and the seal ring, and seal the annular gap therebetween to prevent leakage of coal dust through the annular gap. A spacer is provided between the seals and maintains the seals in axially spaced relation and prevents rolling movement of the seals into the annular interfaces between the spacer and the mill head extension and between the spacer and the seal ring as the mill head extension rotates relative to the seal ring, to prevent coal dust bypass, and leakage to atmosphere.
REFERENCES:
patent: 2063368 (1936-12-01), De La Roza
patent: 4966471 (1990-10-01), Trozzi
patent: 5000462 (1991-03-01), Trozzi
Rosenbaum Mark
Wisconsin Electric Power Company (WEPCO)
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