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Language: English Polish
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Broke Systems Series (Details)Includes 5 courses for $299/year. Paper Library (Details)Includes 92 courses for $1,499/year.
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Training Time: 21 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Polish
There are two types of broke generated on a paper or board machine: continuous and event related. Broke is continuously generated as wet edge trim, winder trim, dressing from reels, and cull rolls. Event-related broke comes from sheet breaks and machine startups and shutdowns. Large quantities of broke can be generated during these events that end up going to under machine repulpers, such as the couch pit, press pit, and dry end repulper. It is important to recover and reuse as much of this valuable fiber resource as possible.
Broke Cleaning and Screening
View Course
Broke Repulpers
Broke System Purpose and Operation
Under-Machine Repulpers
Wet End Chemistry - Functional Papermaking Additives
The following key questions are answered in this module:
Why is it important to maintain broke storage chest levels in the 25 to 35% range during normal operations?This helps ensure sufficient storage capacity during process upsets, such as sheet breaks, threading, and start ups.
Why is broke often thickened so that it can be stored at a higher consistency?The removal of water on broke thickening equipment increases the storage capacity of the broke chests.
Why is it important to control the level in repulper vats during slushing?This allows the rotor to effectively circulate and slush the broke, using the least amount of energy and minimizing repulping time.
Why are dry end repulpers typically of heavier construction than other under-machine repulpers?Dry end repulpers are normally of heavier construction because they must often handle slabs from reels and cull rolls.
Why is it important for the seal pit liquid level to be kept above the dropleg openings from a drum or disc thickener?To make sure that the dropleg opening is not exposed to air, which would cause the thickener to lose vacuum.
Below is a transcript of the video sample provided for this module:
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