Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1996-09-06
1998-03-10
Nguyen, Tuan
Classifying, separating, and assorting solids
Fluid suspension
Liquid
251 77, 251 78, 210117, B04C 514, F16K 3144
Patent
active
057251045
ABSTRACT:
An improved dump valve construction for a high density cellulosic pulp cleaner. The cleaner comprises an upper separating chamber and a lower reject chamber which communicates with the lower end of the separating chamber. Cellulosic pulp is pumped tangentially into the upper end of the separation chamber and is swirled within the separation chamber to cause the high density contaminants to fall into the reject chamber while the pulp is discharged through an outlet in the upper end of the separation chamber. The opening between the lower end of the separation chamber and the reject chamber can be opened and closed by a sliding upper valve while the lower end of the reject chamber is formed with an outlet and the flow through the outlet is controlled by a dump valve having a curved or spherical outer surface which seats on an annular valve seat bordering the outlet. The dump valve is moved between a closed and opened position by a fluid cylinder unit and the piston rod of the fluid cylinder unit is connected to the stem of the dump valve through a lost-motion connection.
REFERENCES:
patent: 3401716 (1968-09-01), Gallogly
patent: 3897042 (1975-07-01), Kachergis
patent: 3942757 (1976-03-01), Hansen et al.
patent: 3944135 (1976-03-01), Kalinovski
patent: 4224959 (1980-09-01), Fling
patent: 5273647 (1993-12-01), Tuszko et al.
"High Density Cleaner Efficiency Determined by Design Materials", Pulp & Paper, Aug. 1994, pp. 42-45.
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