PROCESS FOR REMOVAL OF SOLID NONIFIBROUS MATERIAL FROM PULP

摘要

The present invention relates to a process for removal of solid non-fibrous material from an aqueous pulp suspension comprising providing an aqueous pulp suspension comprising solid non-fibrous material, removing at least part of the solid non-fibrous material from the aqueous pulp suspension thereby forming an aqueous pulp suspension depleted in solid non-fibrous material, dewatering the aqueous pulp suspension depleted in solid non-fibrous material thereby forming a web comprising cellulose-containing fibres and a filtrate comprising residual solid non-fibrous material removing at least part of the residual solid non-fibrous material from the filtrate thereby forming a filtrate depleted in residual solid non-fibrous material and an aqueous stream comprising at least part of the removed residual solid non-fibrous material and diluting the aqueous pulp suspension and/or the aqueous pulp suspension depleted in solid non-fibrous material with at least part of the filtrate depleted in residual solid non-fibrous material, whereby the aqueous stream comprising at least part of the removed residual solid non-fibrous material is purged from the system.

主权项

1. A process for removal of solid non-fibrous material from an aqueous pulp suspension comprising the steps of: providing an aqueous pulp suspension comprising solid non-fibrous material, removing at least part of the solid non-fibrous material from the aqueous pulp suspension thereby forming an aqueous pulp suspension depleted in solid non-fibrous material, dewatering the aqueous pulp suspension depleted in solid non-fibrous material thereby forming a web comprising cellulose-containing fibers and a filtrate comprising residual solid non-fibrous material, removing at least part of the residual solid non-fibrous material from the filtrate thereby forming a filtrate depleted in residual solid non-fibrous material and an aqueous stream comprising at least part of the removed residual solid non-fibrous material, and diluting at least one of the aqueous pulp suspension and the aqueous pulp suspension depleted in solid non-fibrous material with at least part of the filtrate depleted in residual solid non-fibrous material, whereby the aqueous stream comprising at least part of the removed residual solid non-fibrous material is purged from the system.