Method for controlling liquid level in a knot drainer

Details Method for controlling liquid level in a knot drainer Method for controlling liquid level in a knot drainer

1991-10-21

1993-05-11

Jones, W. Gary

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With classifying, separating or screening of pulp

209258, 209268, 210741, 210744, 210767, 210104, B07B 118

Patent

active

052098222

ABSTRACT:
A screen aperture blinding prevention and liquid overflow prevention and level control apparatus for a knot drainer senses liquid level within the knot drainer and compares the sensed level to a setpoint level. Differences in the two levels generate control signals of appropriate magnitude and direction, and those control signals are transmitted to a valve whose degree of responsiveness and openness is adjusted to change the outflow rate of accepts liquor from the accepts chamber of the rejects separator. In addition, passive level control is provided in the discharge line for establishing accept flooded screen apertures regardless of variations of inflow and outflow rates during operation while active level control to create accept flow rate greater than, less than, or equal to inlet flow rate is provided by the combination of siphonic loop, barometric leg and control. Continuous flow of fiber and liquid through separating screen apertures is appropriately supervised by monitoring accepts chamber pressure.

REFERENCES:
patent: 2463526 (1949-03-01), Dickson
patent: 2851161 (1958-09-01), Dahlstrom
patent: 2902156 (1959-09-01), Dahlberg
patent: 3574098 (1971-04-01), Boorjy
patent: 3826368 (1974-07-01), Walters
patent: 4343708 (1982-08-01), Rantanen et al.

Affiliated with

Also associated with

Rating

Method for controlling liquid level in a knot drainer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for controlling liquid level in a knot drainer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for controlling liquid level in a knot drainer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1347881