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Language: English French Portuguese
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Recaust Series (Details)Includes 12 courses for $499/year. Pulping Library (Details)Includes 72 courses for $1,499/year.
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Training Time: 12 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese, French
Green liquor contains undissolved particulate material called "dregs." In order to be reused in the kraft pulping process, the green liquor must be converted back into white liquor. The first step in this process is to purify the green liquor by allowing the dregs to settle in a sedimentation clarifier. This module will provide you an understanding of the purpose, function, and operating principles of green liquor clarifiers.
Dregs Washing
View Course
Lime Kiln Fundamentals
Lime Mud Filtering
Recausticizing Fundamentals
White Liquor Clarifiers
The following key questions are answered in this module:
How is green liquor created?Spent inorganic cooking chemicals from the recovery boiler, or smelt, is combined with ""weak wash"" to create green liquor.
What are dregs?Dregs are the undissolved particulate material in green liquor.
How are dregs removed from green liquor?Dregs are typically removed from green liquor by allowing them to settle out in green liquor clarifier.
What is the effect of polymer added to a green liquor clarifier?Polymer added to green liquor causes small dregs particles to combine together into larger particles, leading to faster and better separation of dregs.
What is ""rise rate"" in a green liquor clarifier?Rise rate refers to the velocity of liquor from the bottom of the clarifier to the top across the entire area of the clarifier.
Below is a transcript of the video sample provided for this module:
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