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EP4308915A4 - Method and system for controlling an apparatus for treating a pulp slurry - Google Patents

Method and system for controlling an apparatus for treating a pulp slurry

Info

Publication number
EP4308915A4
EP4308915A4 EP22771852.5A EP22771852A EP4308915A4 EP 4308915 A4 EP4308915 A4 EP 4308915A4 EP 22771852 A EP22771852 A EP 22771852A EP 4308915 A4 EP4308915 A4 EP 4308915A4
Authority
EP
European Patent Office
Prior art keywords
treating
controlling
pulp slurry
pulp
slurry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22771852.5A
Other languages
German (de)
French (fr)
Other versions
EP4308915A1 (en
Inventor
Tomas VIKSTRÖM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valmet Technologies Oy
Valmet AB
Original Assignee
Valmet Oy
Valmet AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valmet Oy, Valmet AB filed Critical Valmet Oy
Publication of EP4308915A1 publication Critical patent/EP4308915A1/en
Publication of EP4308915A4 publication Critical patent/EP4308915A4/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D21C7/02—Rotary digesters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D21C7/06—Feeding devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C7/00—Digesters
    • D21C7/12—Devices for regulating or controlling
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/18—De-watering; Elimination of cooking or pulp-treating liquors from the pulp
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/663—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02836—Flow rate, liquid level

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Wood Science & Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Paper (AREA)
  • Processing Of Solid Wastes (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
EP22771852.5A 2021-03-19 2022-03-08 Method and system for controlling an apparatus for treating a pulp slurry Pending EP4308915A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2150320A SE2150320A1 (en) 2021-03-19 2021-03-19 Method and system for controlling an apparatus for treating a pulp slurry
PCT/SE2022/050223 WO2022197230A1 (en) 2021-03-19 2022-03-08 Method and system for controlling an apparatus for treating a pulp slurry

Publications (2)

Publication Number Publication Date
EP4308915A1 EP4308915A1 (en) 2024-01-24
EP4308915A4 true EP4308915A4 (en) 2025-01-29

Family

ID=82020799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22771852.5A Pending EP4308915A4 (en) 2021-03-19 2022-03-08 Method and system for controlling an apparatus for treating a pulp slurry

Country Status (3)

Country Link
EP (1) EP4308915A4 (en)
SE (1) SE2150320A1 (en)
WO (1) WO2022197230A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415408A (en) * 1981-11-02 1983-11-15 General Signal Corporation Apparatus, and method for controlling consistency
US4994145A (en) * 1989-03-02 1991-02-19 Seymour George W Process for producing a constant distribution of a selected property across the width of pulp mat on a pulp washing surface
JP2005077135A (en) * 2003-08-28 2005-03-24 Mitsubishi Paper Mills Ltd Pulp beating degree measuring device and its control device
US7013287B1 (en) * 2000-02-22 2006-03-14 Voith Sulzer Paper Technology N. America, Inc. Stock preparation monitoring system and method of same
US20180347111A1 (en) * 2017-05-31 2018-12-06 Gpcp Ip Holdings Llc High Consistency Re-Pulping Method, Apparatus and Absorbent Products Incorporating Recycled Fiber

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6871148B2 (en) * 2002-07-02 2005-03-22 Battelle Memorial Institute Ultrasonic system and technique for fluid characterization
EP3175032B1 (en) * 2014-07-31 2018-09-12 Electrolux Appliances Aktiebolag Laundry treatment apparatus with humidity detector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415408A (en) * 1981-11-02 1983-11-15 General Signal Corporation Apparatus, and method for controlling consistency
US4994145A (en) * 1989-03-02 1991-02-19 Seymour George W Process for producing a constant distribution of a selected property across the width of pulp mat on a pulp washing surface
US7013287B1 (en) * 2000-02-22 2006-03-14 Voith Sulzer Paper Technology N. America, Inc. Stock preparation monitoring system and method of same
JP2005077135A (en) * 2003-08-28 2005-03-24 Mitsubishi Paper Mills Ltd Pulp beating degree measuring device and its control device
US20180347111A1 (en) * 2017-05-31 2018-12-06 Gpcp Ip Holdings Llc High Consistency Re-Pulping Method, Apparatus and Absorbent Products Incorporating Recycled Fiber

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2022197230A1 *

Also Published As

Publication number Publication date
EP4308915A1 (en) 2024-01-24
SE544505C2 (en) 2022-06-21
SE2150320A1 (en) 2022-06-21
WO2022197230A1 (en) 2022-09-22
BR112023018651A2 (en) 2023-10-03

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Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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STAA Information on the status of an ep patent application or granted ep patent

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17P Request for examination filed

Effective date: 20231019

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20250108

RIC1 Information provided on ipc code assigned before grant

Ipc: D21C 7/12 20060101ALI20241223BHEP

Ipc: D21C 7/06 20060101ALI20241223BHEP

Ipc: D21C 7/02 20060101ALI20241223BHEP

Ipc: D21C 9/18 20060101ALI20241223BHEP

Ipc: D21C 9/02 20060101ALI20241223BHEP

Ipc: G01F 1/667 20220101ALI20241223BHEP

Ipc: G01F 1/663 20220101ALI20241223BHEP

Ipc: G01F 1/66 20220101ALI20241223BHEP

Ipc: G01N 29/02 20060101AFI20241223BHEP