CA2383920C - Appareil et procede de detection du niveau d'un lit de boue - Google Patents

Appareil et procede de detection du niveau d'un lit de boue Download PDF

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Publication number
CA2383920C
CA2383920C CA002383920A CA2383920A CA2383920C CA 2383920 C CA2383920 C CA 2383920C CA 002383920 A CA002383920 A CA 002383920A CA 2383920 A CA2383920 A CA 2383920A CA 2383920 C CA2383920 C CA 2383920C
Authority
CA
Canada
Prior art keywords
level
thickener
mud bed
control signal
probe
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.)
Expired - Fee Related
Application number
CA002383920A
Other languages
English (en)
Other versions
CA2383920A1 (fr
Inventor
Andrew Joseph Vietti
Fredre Dunn
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.)
De Beers Consolidated Mines Ltd
Original Assignee
De Beers Consolidated Mines Ltd
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 De Beers Consolidated Mines Ltd filed Critical De Beers Consolidated Mines Ltd
Publication of CA2383920A1 publication Critical patent/CA2383920A1/fr
Application granted granted Critical
Publication of CA2383920C publication Critical patent/CA2383920C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/32—Density control of clear liquid or sediment, e.g. optical control ; Control of physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/30—Control equipment
    • B01D21/34—Controlling the feed distribution; Controlling the liquid level ; Control of process parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
    • G01F23/2967—Acoustic waves making use of acoustical resonance or standing waves for discrete levels
    • 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
    • G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
    • 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
    • G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
    • G01N29/348—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor with frequency characteristics, e.g. single frequency signals, chirp signals
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0018—Separation of suspended solid particles from liquids by sedimentation provided with a pump mounted in or on a settling tank
    • 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
    • G01N2291/024—Mixtures
    • G01N2291/02416—Solids in liquids
    • 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
    • G01N2291/02818—Density, viscosity
    • 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)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • General Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un procédé et un appareil de détection et de commande du niveau d'un lit de boue dans un épaississeur par gravité à compression élevée (10). L'épaississeur est pourvu de sondes à vibrations supérieures et inférieures (12 et 24) qui vibrent à une amplitude et fréquence prédéterminées. Lorsque le lit de boue atteint un niveau (30), la sonde à vibrations (12) est permutée, ce qui délivre un signal d'allumage par une ligne de commande (32) pour mettre en route une pompe de sous-écoulement (22). Au cas où le lit de boue atteint un niveau inférieur (34), la sonde à vibrations transmet un signal d'arrêt par une ligne de commande (36), ce qui interrompt le fonctionnement de la pompe (22) et permet au niveau de boue d'augmenter. Les signaux de commande des sondes à vibrations supérieure et inférieure (12) et (24) sont utilisés pour adapter l'écoulement de la boue par adaptation de la vitesse de la pompe de sous-écoulement (22) de manière à commander le niveau du lit de boue à l'intérieur de l'épaississeur.
CA002383920A 1999-09-01 2000-08-31 Appareil et procede de detection du niveau d'un lit de boue Expired - Fee Related CA2383920C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA995631 1999-09-01
ZA99/5631 1999-09-01
PCT/IB2000/001210 WO2001016591A1 (fr) 1999-09-01 2000-08-31 Appareil et procede de detection du niveau d'un lit de boue

Publications (2)

Publication Number Publication Date
CA2383920A1 CA2383920A1 (fr) 2001-03-08
CA2383920C true CA2383920C (fr) 2008-06-10

Family

ID=25587892

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002383920A Expired - Fee Related CA2383920C (fr) 1999-09-01 2000-08-31 Appareil et procede de detection du niveau d'un lit de boue

Country Status (3)

Country Link
AU (1) AU776779B2 (fr)
CA (1) CA2383920C (fr)
WO (1) WO2001016591A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO327253B1 (no) * 2006-10-10 2009-05-25 Aker Subsea As Fremgangsmåte og system for kontroll av fluidnivå i en tank
CN102192196B (zh) * 2011-05-25 2013-03-27 云南大红山管道有限公司 一种可自动排污和自动清洗的底流泵及其控制方法
WO2013171652A1 (fr) * 2012-05-14 2013-11-21 Paterson & Cooke Consulting Scientists (Proprietary) Limited Procédé de commande d'un dispositif de sédimentation par gravité
US10046252B2 (en) * 2013-04-29 2018-08-14 Micro Motion, Inc. Sand separator interface detection
US9506850B2 (en) 2013-05-06 2016-11-29 Westech Engineering, Inc. Apparatus and method for determining one or more characteristics of a viscous material
CN107344810A (zh) * 2017-09-04 2017-11-14 嘉兴奥拓迈讯自动化控制技术有限公司 全自动智能出泥控制***
US11708286B2 (en) 2020-08-19 2023-07-25 Marmon Industrial Water Llc High rate thickener and eductors therefor
CN112985506B (zh) * 2021-03-05 2023-03-17 北京科技大学 一种深锥浓密机泥层高度与泥层压强互算方法
CN115015527B (zh) * 2022-06-10 2023-12-22 山东理工大学 一种模拟深锥浓密机高压力的实验装置及实验方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226714A (en) * 1978-12-27 1980-10-07 The Anaconda Company Thickener control system
MY111234A (en) * 1993-09-06 1999-09-30 Merpro Tortek Ltd Liquid / solid separation.
AUPM654094A0 (en) * 1994-06-29 1994-07-21 Alcoa Of Australia Limited Thickener mud gauge (conductivity)

Also Published As

Publication number Publication date
WO2001016591A1 (fr) 2001-03-08
AU776779B2 (en) 2004-09-23
CA2383920A1 (fr) 2001-03-08
AU6716600A (en) 2001-03-26

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