High Density Cleaners

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High density (or HD) cleaners are large diameter forward cleaners capable of processing several hundred tons of fiber per day. The main purpose of high density cleaners is to separate heavy contaminants from fibers in suspensions of fibers in water (often referred to as "stock"). This protects downstream equipment from excessive wear and damage. They may also be used for fiber recovery. This module will describe the operation of high density cleaners and identify typical applications of high density cleaners in secondary fiber, pulp mill, stock preparation, and broke systems.