Method and equipment for controlling reject handling in pulping process

• Main Authors: KESSELI HARRI, AHO TUOMO
• Format: Patent
• Language: Chinese; English
• Published: 03.08.2011
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; CONTROLLING; CRUSHING, PULVERISING, OR DISINTEGRATING; CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK; MILLING GRAIN; PAPER-MAKING; PERFORMING OPERATIONS; PHYSICS; PREPARATORY TREATMENT OF GRAIN FOR MILLING; PRODUCTION OF CELLULOSE; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; TEXTILES; TRANSPORTING

A method and equipment for controlling reject handling in a pulping process which has a pulper (1) for the preparation of a fibre pulp suspension and a ragger (2) for the removal of reject from the pulper (1) in the form of a ragger rope (4). The method comprises measuring at least one property of the ragger rope (4) of the ragger (2) and/or at least one effect caused by the ragger rope (4) on the ragger (2) and/or the rate of travel of the ragger rope (4) and/or at least one property of the operation of the ragger (2), and adjusting the rate of travel of the ragger rope (4) and/or the operation of pulping on the basis of the measured property of the ragger rope (4) and/or effect caused by the ragger rope (4) on the ragger (2) and/or rate of travel of the ragger rope (4) and/or property (TM) of the ragger (2) operation.