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WO2008138060A1 - Système et procédé de maximisation de la concentration en matières solides d'une boue pompée à travers un pipeline - Google Patents

Système et procédé de maximisation de la concentration en matières solides d'une boue pompée à travers un pipeline Download PDF

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Publication number
WO2008138060A1
WO2008138060A1 PCT/AU2008/000670 AU2008000670W WO2008138060A1 WO 2008138060 A1 WO2008138060 A1 WO 2008138060A1 AU 2008000670 W AU2008000670 W AU 2008000670W WO 2008138060 A1 WO2008138060 A1 WO 2008138060A1
Authority
WO
WIPO (PCT)
Prior art keywords
sump
pipeline
slurry
section
water
Prior art date
Application number
PCT/AU2008/000670
Other languages
English (en)
Inventor
Norman Terry Cowper
Allan Donald Thomas
Original Assignee
Cowper Norman T
Allan Donald Thomas
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
Priority claimed from AU2007902609A external-priority patent/AU2007902609A0/en
Application filed by Cowper Norman T, Allan Donald Thomas filed Critical Cowper Norman T
Priority to AU2008251031A priority Critical patent/AU2008251031B2/en
Publication of WO2008138060A1 publication Critical patent/WO2008138060A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/10—Pipelines for conveying excavated materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/30—Conveying materials in bulk through pipes or tubes by liquid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/088—Pipe-line systems for liquids or viscous products for solids or suspensions of solids in liquids, e.g. slurries

Definitions

  • the present invention relates to systems for transporting slurry through pipelines.
  • Fine particle mineral slurries are commonly transported by pipeline in the mineral and coal industries. Normally it is preferred to pump at as high a solids concentration as possible to minimise water usage. For typical fine particle slurries the maximum concentration is generally limited by the onset of laminar flow which is related to the rheology (viscosity) of the slurry. Turbulent flow is required to be maintained in the pipeline to prevent coarser particles settling and causing unstable operation and increasing pump pressure over time.
  • a method for controlling slurry flowing through a pipeline including the steps of: providing dense slurry into a sump; adding water into the sump to dilute the dense slurry; pumping the diluted slurry from the sump to a main pipeline; providing a section of testing pipeline in-line with the main pipeline; measuring parameters relating to a turbulence parameter Y of the diluted slurry flowing through the test pipeline; determining a current turbulence parameter Y and comparing the current turbulence parameter Y with a predetermined maximum threshold value; wherein, if the current turbulence parameter Y is greater than the predetermined maximum threshold value, increasing the volume of water being added to the sump until the current turbulence parameter falls to a predetermined minimum value; otherwise, if the current turbulence parameter Y is less than the predetermined maximum threshold value, decreasing the volume of water being added to the sump.
  • the section of testing pipeline has a larger internal cross- section than the main pipeline.
  • the measured parameters include: the differential pressure along the length of the section of testing pipeline; the density of slurry entering the section of testing pipeline; and the volumetric flow rate of slurry entering the section of testing pipeline.
  • the steps of increasing or decreasing the volume of water being added to the sump includes adjusting a flow valve in the water feed pipe. This adjustment may be conducted in periodic increments.
  • the rate of diluted slurry being pumped from the sump is adjustable to maintain the slurry level in the sump below a selected level. Ideally, this adjustment is responsive to the output of a level detector in the sump.
  • a system for controlling slurry flowing through a pipeline including: a sump, into which dense slurry and diluting water are added; one or more pumps for pumping diluted slurry from the sump to a main pipeline; a section of testing pipeline provided in-line with the main pipeline; a plurality of detectors for measuring parameters relating to a turbulence parameter Y of the diluted slurry flowing through the test pipeline; a controller arranged to receive the outputs from the detectors, the controller being programmed to determine a current turbulence parameter Y and compare the current turbulence parameter Y with a predetermined maximum threshold value; wherein, if the current turbulence parameter Y is greater than the predetermined maximum threshold value, the controller causes an increase in the volume of water being added to the sump until the current turbulence parameter falls to a predetermined minimum value; otherwise, if the current turbulence parameter Y is less than the predetermined maximum threshold value, the
  • the present invention advantageously provides a slurry pipeline system which controls water usage to keep the same to a minimum and maximise the solids concentration of slurry delivered by the pipeline.
  • Fig. 1 illustrates a schematic diagram of the components of a slurry pipeline system. DESCRIPTION OF PREFERRED EMBODIMENT
  • Q is volumetric flow rate of slurry.
  • the turbulence parameter Y is essentially constant over a normal range of flow rates, slurry densities and slurry rheology. It should be appreciated that this constant parameter can vary between different pipeline systems, hence a new pipeline system needs to undergo testing and analysis to determine its own normal turbulence parameter. Under undesirable conditions, such as when there is a transition from turbulent flow to laminar flow or when the flow rate falls below a deposition velocity (whereby coarse particles begin to settle), there is a marked increase in the turbulence parameter Y.
  • Fig. 1 illustrates a schematic representation of a slurry control system.
  • High density slurry discharges from a slurry thickener 6 and is pumped via a thickener underflow pump 7 into a sump 8. Water is fed into the sump via a feedpipe to dilute the slurry in the sump 8. The volume of water flowing into the sump is controlled by a flow valve 12.
  • Main slurry pumps 9 pump the diluted slurry to a main transfer pipeline 11.
  • Figure 1 shows two main slurry pumps in series. It will be appreciated that the number of pumps can vary depending on requirements for the actual pipeline system.
  • testing pipeline 1 In-line with the main pipeline 11 there is provided a section of testing pipeline 1.
  • the diluted slurry is caused to flow through the testing pipeline 1 to the main pipeline 11 from the main pumps 9.
  • a density meter 2 for example a nuclear density gauge, measures the specific gravity/density of slurry entering the testing pipeline 1.
  • a flowmeter 3 for example a magnetic flowmeter, measures the volumetric flow rate of slurry entering the testing pipeline 1.
  • a differential pressure meter 4 measures the differential pressure over the length of testing pipeline 1.
  • a controller 5 receives signals indicative of the measured outputs of the density meter 2, flowmeter 3 and differential pressure meter 4. Based on the received signals, the controller 5 is programmed to calculate a current turbulence parameter Y using the equation noted above.
  • the controller 5 compares the current turbulence parameter Y with a predetermined maximum threshold value.
  • This maximum threshold value is selected upon the basis of the onset of undesirable flow conditions in the testing pipeline 1. Practically, such thresholds would be determined by conducting tests and analysis of the particular pumping system after initial installation. As discussed before, undesirable conditions include the presence of laminar flow (in the case of fine particle slurries) and the deposition of a bed of slurry particles (in the case of coarse slurry particles) in the testing pipeline 1.
  • the maximum threshold value is approximately 10% above a turbulence parameter indicative of a homogeneous turbulent flow condition in the testing pipeline 1.
  • the testing pipeline 1 has a larger internal cross-sectional area than the main pipeline 11. Due to the larger cross-section, the flow velocity in the testing pipeline 1 is lower than the main pipeline 11. Hence, while a transition to laminar flow may be present in the testing pipeline 1 ; required turbulent flow will remain in the main pipeline 11. Similarly, in the case of coarse particle slurries, as flow velocity reduces, deposition will initially occur in the testing pipeline 1 before the main pipeline. In the case of deposition, a bed of particles will begin to form in the testing pipeline, thereby increasing the pressure gradient. In each case, the onset of undesirable conditions in the testing pipeline 1 results in an increase in the current turbulence parameter Y.
  • the controller 5 on the basis of the current turbulence parameter Y and the comparison with the predetermined maximum threshold value, sends a control signal to the flow valve 12 to adjust the volume of water being added to the sump 8.
  • the controller 5 slowly, but continuously, increases the slurry density, i.e. solids concentration, by decreasing the volume of water being added to the sump 8.
  • the increase in slurry density may be, for example, 0.01 SG point every 5 minutes.
  • the controller 5 starts to decrease the slurry density at a set rate by increasing the volume of water being added to the sump 8.
  • the system additionally includes a level detector 10 in the sump 8.
  • the output of the level detector 10 is used in a separate control loop with the controller 5 and the main pumps 9 to control the pumping speed of the pumps 9 to maintain the sump level below a selected threshold. As such, the pump speed is varied to vary the diluted slurry flow rate to suit input flow into the sump 8.
  • testing pipeline 1 The length of testing pipeline 1 will depend upon the internal cross-section employed. However, it may be typically around 20m to 100m. Conveniently, the testing pipeline 1 will form the initial portion of the pipeline system with the main pipeline 11 continuing on from the end of the testing pipeline 1. However, conceivably, the testing pipeline 1 could be provided further downstream of the pipeline system. While the testing pipeline 1 has been schematically illustrated as a straight section, it may be provided in different configurations. For example, it may be advantageous to provide the testing pipeline 1 in the form of a loop, thereby bringing the ends of the testing pipeline physically close together. This loop configuration would greater facilitate the arrangement of the differential pressure meter 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

L'invention concerne un procédé permettant de contrôler une boue circulant à travers un pipeline (11). Une boue dense est disposée dans un bassin à boue (8). De l'eau est ajoutée dans le bassin à boue (8) pour diluer la boue dense. La boue diluée est pompée du bassin à boue (8) vers un pipeline principal (11). Une section de pipeline de test (1) est disposée en ligne avec le pipeline principal (11). Des paramètres se rapportant à un paramètre de turbulence Y de la boue diluée circulant à travers le pipeline de test (1) sont mesurés. Un paramètre Y de turbulence courant est déterminé et comparé avec une valeur seuil maximale prédéterminée. Si le paramètre Y de turbulence courant est supérieur à la valeur seuil maximale prédéterminée, on augmente le volume d'eau qui est ajouté au bassin à boue (8) jusqu'à ce que le paramètre de turbulence courant tombe à une valeur minimale prédéterminée. Autrement, si le paramètre Y de turbulence courant est inférieur à la valeur seuil maximale prédéterminée, on diminue le volume d'eau qui est ajouté au bassin à boue (8). L'invention concerne également un système pour mettre en œuvre le procédé.
PCT/AU2008/000670 2007-05-16 2008-05-13 Système et procédé de maximisation de la concentration en matières solides d'une boue pompée à travers un pipeline WO2008138060A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2008251031A AU2008251031B2 (en) 2007-05-16 2008-05-13 System and method for maximising solids concentration of slurry pumped through a pipeline

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2007902609 2007-05-16
AU2007902609A AU2007902609A0 (en) 2007-05-16 MaxSolids - A system to maximise solids concentration pumped through a slurry pipeline

Publications (1)

Publication Number Publication Date
WO2008138060A1 true WO2008138060A1 (fr) 2008-11-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2008/000670 WO2008138060A1 (fr) 2007-05-16 2008-05-13 Système et procédé de maximisation de la concentration en matières solides d'une boue pompée à travers un pipeline

Country Status (2)

Country Link
AU (1) AU2008251031B2 (fr)
WO (1) WO2008138060A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010093514A1 (fr) * 2009-02-13 2010-08-19 Technip France Système et procédé d'utilisation de données de surveillance pour améliorer la production de sulfure de fonds océaniques dans un système d'exploitation minière en eaux profondes
CN102530561A (zh) * 2011-12-13 2012-07-04 江西稀有稀土金属钨业集团有限公司 砂泵多级串联输送尾矿的系统与方法
WO2014102818A1 (fr) * 2012-12-24 2014-07-03 Cadila Healthcare Limited Dérivés inédits de quinolone
CN110397850A (zh) * 2018-07-06 2019-11-01 中煤张家口煤矿机械有限责任公司 一种集约式污泥自动输配装置及使用方法
CN110736028A (zh) * 2019-09-29 2020-01-31 云南大红山管道有限公司 一种长距离浆体管道多级泵站输送中加速流控制系统和方法
CN114791088A (zh) * 2022-04-06 2022-07-26 云南大红山管道有限公司 一种浆体管道石灰乳的添加装置及添加控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428908A (en) * 1993-03-09 1995-07-04 Kerfoot; William B. Apparatus and method for subsidence deepening
AU717486B2 (en) * 1995-12-08 2000-03-30 Hydraplant Equipment Pty Ltd A mobile pumping station
WO2007056806A1 (fr) * 2005-11-15 2007-05-24 Technological Resources Pty. Limited Dispositif de modification de l’ecoulement d’un fluide dans une conduite

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428908A (en) * 1993-03-09 1995-07-04 Kerfoot; William B. Apparatus and method for subsidence deepening
AU717486B2 (en) * 1995-12-08 2000-03-30 Hydraplant Equipment Pty Ltd A mobile pumping station
WO2007056806A1 (fr) * 2005-11-15 2007-05-24 Technological Resources Pty. Limited Dispositif de modification de l’ecoulement d’un fluide dans une conduite

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7784201B2 (en) 2007-09-23 2010-08-31 Technip France System and method of utilizing monitoring data to enhance seafloor sulfide production for deepwater mining system
WO2010093514A1 (fr) * 2009-02-13 2010-08-19 Technip France Système et procédé d'utilisation de données de surveillance pour améliorer la production de sulfure de fonds océaniques dans un système d'exploitation minière en eaux profondes
CN102530561A (zh) * 2011-12-13 2012-07-04 江西稀有稀土金属钨业集团有限公司 砂泵多级串联输送尾矿的系统与方法
WO2014102818A1 (fr) * 2012-12-24 2014-07-03 Cadila Healthcare Limited Dérivés inédits de quinolone
CN104903295A (zh) * 2012-12-24 2015-09-09 卡迪拉保健有限公司 新型喹诺酮衍生物
AU2013368843B2 (en) * 2012-12-24 2016-02-25 Zydus Lifesciences Limited Novel quinolone derivatives
US9394300B2 (en) 2012-12-24 2016-07-19 Cadila Healthcare Limited Quinolone derivatives
CN104903295B (zh) * 2012-12-24 2017-09-01 卡迪拉保健有限公司 喹诺酮衍生物
EA028402B1 (ru) * 2012-12-24 2017-11-30 Кадила Хелзкэр Лимитед Хинолоновые производные
CN110397850A (zh) * 2018-07-06 2019-11-01 中煤张家口煤矿机械有限责任公司 一种集约式污泥自动输配装置及使用方法
CN110736028A (zh) * 2019-09-29 2020-01-31 云南大红山管道有限公司 一种长距离浆体管道多级泵站输送中加速流控制系统和方法
CN114791088A (zh) * 2022-04-06 2022-07-26 云南大红山管道有限公司 一种浆体管道石灰乳的添加装置及添加控制方法

Also Published As

Publication number Publication date
AU2008251031B2 (en) 2013-12-19
AU2008251031A1 (en) 2008-11-20

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