Title:
SYSTEM FOR THE OXYGEN DELIGNIFICATION OF PULP CONSISTING OF LIGNOCELLULOSE-CONTAINING MATERIAL
Document Type and Number:
WIPO Patent Application WO2001002641
Kind Code:
B1
Abstract:
The invention relates to a system for the oxygen delignification, in at least two reaction stages, of pulp which consists of lignocellulose-containing material and whose mean concentration is 8-18% pulp consistency. The oxygen delignification takes place in a first reaction stage (6) in which an essentially constant and low pressure prevails during the whole of the delignification process, after which the second delignification stage (10), with a substantially higher pressure and temperature and a longer dwell time, begins. The invention is characterised in that the first reaction stage (6) consists of a pipe loop arranged to lie essentially in the same horizontal plane.
Inventors:
DAHLLOEF HAAKAN (SE)
RAGNAR MARTIN (SE)
RAGNAR MARTIN (SE)
Application Number:
PCT/SE2000/001453
Publication Date:
February 08, 2001
Filing Date:
July 06, 2000
Export Citation:
Assignee:
KVAERNER PULPING TECH (SE)
DAHLLOEF HAAKAN (SE)
RAGNAR MARTIN (SE)
DAHLLOEF HAAKAN (SE)
RAGNAR MARTIN (SE)
International Classes:
D21C9/10; D21C9/147; (IPC1-7): D21C9/147
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