Patent classifications
D
TEXTILES; PAPER
Load children
D21
PAPER-MAKING; PRODUCTION OF CELLULOSE
Load children
D21H
PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
Load children
21/00
Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
Load children Filter patents View analytics View as hierarchy Open in page
D21H21/02
Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
Load children Filter patents View analytics View as hierarchy Open in page

D21H21/04

Biocide control in paper making
20250198086 · 2025-06-19 ·

A method for controlling paper making includes monitoring (302) a surface level of a fibrous suspension in a storage, and identifying (303) that the surface level has decreased so that at least one emptying criterion is met and thereafter identifying that the surface level has increased so that at least one refilling criterion is met, and responsively to the identifying that the surface level has increased so that the at least one refilling criterion is met, starting to dose a biocide agent into the fibrous suspension entering the storage. A corresponding apparatus and computer program are disclosed.