1. Disintegration – Resuspension
Pulp disintegration is a triple operation involving the agitation of a volume of pulp, its mixing and dispersion by reducing the size of the solid objects (fibrous aggregates or flocs) that make it up. The objectives are to obtain a homogeneous, pumpable fibrous suspension and to separate coarse contaminants and fibers.
1.1 Technology description
The equipment used depends mainly on the nature of the fibrous raw material.
In the case of a "non-integrated" paper mill, the raw material is received in the form of bales of pulp, already dried to between 90% and 95% dryness. These bales are then fed into the pulper to obtain a homogeneous, pumpable fibrous suspension.
In the...
The Ultimate Scientific and Technical Reference
This article is included in
Unit operations. Chemical reaction engineering
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Disintegration – Resuspension
Pulp refining
Documentation sources
Also in our database
Standards
Determination of the Schopper-Riegler index of paper pulp is the subject of a French standard, AFNOR NF Q 50 003, and an international standard, ISO 5267-1: Drainability of pulp by the Schopper-Riegler method.
Manufacturers – Suppliers – Distributors
In France, manufacturers of disintegrators (pulpers), disc refiners, conical refiners and linings for refiners are :
ABK Machinery http://www.abkmachinery.com
Allimand http://www.allimand.com
...
Organizations
The Centre Technique du Papier (CTP) is the industrial technical center for the French paper industry. It is one of the supervisory bodies of the Laboratoire de Génie des Procédés Papetiers (LGP2), a joint CNRS 5518 research unit at the École Française de Papeterie et des Industries Graphiques (EFPG), part of the Institut Polytechnique de Grenoble (IPG). These two organizations can respond to requests from industry within...
Economic data
In relation to the total energy installed in a paper mill (non-integrated mill), the proportion of energy consumed for pulp disintegration represents an average of 2 to 6%, or 30 to 150 kJ/kg in useful (or net) mass energy. For the industrial refining operation, at low mass fractions (2 to 6%), the proportion of energy installed represents 5 to 30%, or 350 to 850 kJ/kg in useful mass energy.
The Ultimate Scientific and Technical Reference
