All new pulp and paper mills use primarily hydrocyclone separators in their pulp cleaning systems.Design variations to optimize processing for special purposes have been used to a very limited extent.In considering the application of a cleaner,the system and not the individual cleaner should be the basis for an evaluation.If the reject rate can be reduced and clean pulp still produced,substantial saving can be realized in power,number of units,pump size,space,fibre loss,and other factors.A sensible approach to a production system can result in a compromise,a balance between capital investment,energy cost,space requirement,and cleaning efficiency of the system.
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