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US 2022/0195668 A1Published application
System for managing solids in papermaking whitewater
OwnerJoseph P. McDonaldinventor
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Abstract
Methods and systems for reducing the loss of usable fibers from whitewater while simultaneously increasing paper making machine performance and paper quality are provided. The methods and systems utilize a fractionating saveall to separate whitewater into a dilute wastewater fraction that contains unwanted fine particles and a thicker consistency reusable fraction containing paper-forming fibers. The reusable fraction is recirculated back into the whitewater stream, while the wastewater is routed away from the whitewater stream.
Claims5
A method for recovering usable pulp fibers in a paper making system, the method comprising:
- passing whitewater from a wet-end sump pit at the wet-end of a paper making system into a fractionating saveall, whereby the fractionating saveall separates the whitewater into a wastewater fraction in which particulate matter is concentrated and a reusable fraction in which usable pulp fibers are concentrated;
- discharging the wastewater fraction from the paper making system;
- and
- circulating the useable fraction directly back into whitewater in the wet-end of the paper making system.
1 more element
Dependencies are inferred from the claim text.