Method for controlling a device for treating high-consistency pulp

A method for controlling a device for treating fibrous material, the method comprising:

• providing the device with a housing, a first treatment tool and a second treatment tool arranged in the housing and each affixed to a base plate, the first and second treatment tools having a rotationally symmetrical form, being arranged coaxially with respect to each other, being rotatable relative to one another about a common axis, and delimiting a treatment gap through which the fibrous material flows radially, and the treatment gap having a variable gap width to be varied by an axial displacement of at least one of the base plates of the treatment tools;
• determining a minimum distance between the base plates by detecting oscillations on the device and decreasing a distance between the base plates that rotate relative to one another until a frequency of the oscillations or an amplitude of the oscillations exceeds a limiting value;
• defining the distance between the base plates when the limiting value is exceeded as the minimum distance;
• and
• detecting the width of the treatment gap width during an operation of the device for treating the fibrous material and, following the step of determining the minimum distance, measuring a change in an axial distance between the base plates and using the measurement as a reference base for the width of the treatment gap.

A method for controlling a device for treating fibrous material, the method comprising:

• providing the device with a housing, a first treatment tool and a second treatment tool arranged in the housing and each affixed to a base plate, the first and second treatment tools having a rotationally symmetrical form, being arranged coaxially with respect to each other, being rotatable relative to one another about a common axis, and delimiting a treatment gap through which the fibrous material flows radially, and the treatment gap having a variable gap width to be varied by an axial displacement of at least one of the base plates of the treatment tools;
• determining a minimum distance between the base plates by detecting oscillations on the device and decreasing a distance between the base plates rotating relative to one another until a change in a frequency (Δf) of the oscillations or a change in an amplitude of the oscillations exceeds a limiting value;
• and
• setting a rotational speed during the step of determining the minimum distance between the base plates to below an operating rotational speed;
• and
• defining the distance when the limiting value is exceeded as the minimum distance.

A method for controlling a device for treating fibrous material, the method comprising:

• providing the device with a housing, a first treatment tool and a second treatment tool arranged in the housing and each affixed to a base plate, the first and second treatment tools having a rotationally symmetrical form, being arranged coaxially with respect to each other, being rotatable relative to one another about a common axis, and delimiting a treatment gap through which the fibrous material flows radially, and the treatment gap having a variable gap width to be varied by an axial displacement of at least one of the base plates of the treatment tools;
• determining a minimum distance between the base plates by detecting oscillations on the device and decreasing a distance between the base plates rotating relative to one another until a change in a frequency (Δf) of the oscillations or a change in an amplitude of the oscillations exceeds a limiting value;
• defining the distance when the limiting value is exceeded as the minimum distance;
• and
• detecting the width of the treatment gap during an operation of the device for treating the fibrous material and, following the step of determining the minimum distance, measuring a change in an axial distance between the base plates and using the measurement as a reference base for the width of the treatment gap.