Patent ID: 8303770
Filing Date: 2012-11-06
Classification: D21C

Abstract:
1. A method for adjusting the seal in a washer for washing and dewatering a cellulose pulp comprising a rotatable drum including a plurality of axial compartment walls distributed along the circumference of said drum defining a plurality of outer compartments for washing said cellulose pulp, a stationary cylindrical casing enclosing said drum, defining an annular space between said stationary cylindrical casing and said rotatable drum, and at least one axially disposed seal dividing said annular space into a plurality of zones for forming, washing and discharging said pulp, said method comprising: registering a pulse signal indicating the force acting on said at least one axially disposed seal in a direction relative to said drum, said pulse signal corresponding to forces acting between said plurality of axial compartment walls and said at least one axially disposed seal; deriving a relative pulse height parameter comprising a difference between two absolute values from said registered pulse signal; and moving said at least one axially disposed seal substantially in the radial direction of said drum in a predetermined manner based on said relative pulse height parameter.