Apparatus and method for processing white water in a paper machine
AssigneeValmet Aktiebolag
InventorsElin Engqvist, Leif Videgren
Life of this patent
Estimating the term…
Abstract
Aspects provide for a Whitewater processing system suitable for managing an ejected Whitewater spray during operation of a paper or board making machine. A de-air system may provide for improved removal of air from the Whitewater. A calming system may reduce turbulence in a liquid flow, reducing turbulence in the flume. The de-air system and calming system may be disposed together or separately. Certain aspects may be implemented with a turbine (e.g., used to generate electricity from the Whitewater spray). Some aspects may provide for improved handling of variable spray velocities.
Claims18
A calming station configured for use with a forming section of a paper machine to reduce turbulence in a liquid flowing from the forming section into a flume of the paper machine, the calming station comprising:
- a liquid inlet configured to receive the liquid;
- a liquid outlet configured to convey the liquid out of the calming station;
- and
- a gate through and/or around which the liquid may flow, the gate having a pattern of one or more holes, bars, slats, ridges, and/or grooves, configured to modify the flow of liquid through and/or around the gate, the gate comprising least one of:
- an adjustable gate configurable among two or more different positions that alter the flow of the liquid in different ways;
- and
- a first portion having a first pattern of one or more holes, bars, slats, ridges, and grooves, and a second portion having a second pattern of one or more holes, bars, slats, ridges, and grooves different than the first pattern.
2-24. (canceled)
A method for managing a flow of liquid water into a flume of a paper machine, the method comprising:
- providing an apparatus having:
- a liquid inlet coupled to a forming section of the paper machine,
- a liquid outlet coupled to the flume, and
- an adjustable gate configured to interact with liquid flowing through the apparatus, and positionable among a plurality of positions having different interactions with the flowing liquid;
- determining a first flow rate of water out of the forming section;
- adjusting the adjustable gate to a first position for a flow of water at the first flow rate;
- determining a second flow rate of water different than the first flow rate;
- and
- adjusting the adjustable gate to a second position during a flow at the second flow rate.
Dependencies are inferred from the claim text.