• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Dilution unit of a concentrated PAM polymer solution comprising injection equipment followed by a static mixer.
    公开号:FR3063230A1
    申请号:FR1751489
    申请日:2017-02-24
    公开日:2018-08-31
    发明作者:Christophe RIVAS
    申请人:SNF SA；SPCM SA；
    IPC主号:
    专利说明:

    (57) Dilution unit for a concentrated PAM type polymer solution comprising injection equipment followed by a static mixer.
    Mixing chamber
    FR 3 063 230 - A1
    Concentrated solution.
    Static mixer ///////
    Diluted solution
    Liquid injection nozzle - Liquid for Dilution of polymer solution
    Objectives of innovation
    Dilute a concentrated solution of PAM type polymer in water as quickly and homogeneously as possible in order to obtain this diluted PAM solution as soon as it leaves the dilution unit.
    Applications:
    • Oil: enhanced oil recovery (EOR for Enhanced Oil Recovery) • Water treatment: municipal, industrial, mining.
    Polymer of polyacrylamide type and associated (PAM): copolymers (Acrylamide, Acrylic acid), terpolymers (Acrylamide, Acrylic acid, acrylamido-2-methylpropane sulfonic acid (AM PS for Acrylamido-2methylpropane sulfonic acid), post hydrolyzed polymers, additive polymers.
    1.1 Typical PAM dissolution and dilution installation
    1.1.1 Overview of a dissolution and dilution unit
    In order to be able to be used the PAM polymer in powder form must be dissolved in water at concentrations of 0.25 to 5g / l. This solution is carried out in two main stages:
    • A first step of dissolving the powder in water which gives rise to a concentrated aqueous solution of PAM, concentration of 3 to 20 g / l, • A second step of dilution of this concentrated solution which gives rise to a dilute solution directly usable, concentration from 0.25 to 5 g / l.
    Depending on needs and application constraints, the second dilution step can be carried out at high pressure (from 5 to 250 barg) or at low pressure (from 1 to 5 barg).
    1.1.1.1 High pressure dilution
    Figure 1 illustrates the PAM dissolution and dilution unit with high pressure dilution.
    1.1.1.2 Low pressure dilution
    Figure 2 illustrates the PAM dissolution and dilution unit with low pressure dilution.
    1.1.2 Typical installation for dilution of current concentrated MAP solution
    The dilution step of the concentrated PAM solution usually consists of an injection point of the penetrating tube type, followed by an in-line static mixer.
    Figure 3: Typical dilution unit of concentrated PAM solution.
    The configuration of FIG. 3 does not allow homogeneous dilution at the outlet of the static mixer. The contact surface 10 between the concentrated solution and the dilution water upstream of the static mixer is small and increases the time of diffusion of the water in the concentrated solution. This diffusion time of the dilution water in the concentrated solution is transferred downstream of the static mixer, inducing an inhomogeneity of the diluted solution directly at the outlet of the dilution unit.
    1.1.3 Concentrated PAM solution dilution installation with the new injection nozzle
    The principle of operation of this dilution is to diffuse the dilution water via a perforated tube into the injection chamber into which the concentrated solution is introduced upstream.
    Figure 4 illustrates the typical P AM concentrated solution dilution unit with the new injection nozzle.
    1.2 Improve and accelerate the homogenization of a diluted PAM powder solution
    The liquid / liquid mixture envisaged for this innovation is specific, it concerns two aqueous solutions of different viscosities. The difference in viscosity is linked to the presence of PAM type polymer, dissolved at different concentrations in water.
    The dissolution of MAP in water proceeds from two mechanisms:
    A. Dispersion of vesicles of concentrated PAM solution in dilution water for initial concentrations of:
    at. 3 to 20 g / l,
    b. 5 to 15 g / l,
    vs. 8 to 12 g / l.
    This step creates the largest possible MAP / water exchange surface.
    B. Dilution of WFP
    This step corresponds to the migration of water into the vesicles of concentrated PAM solution, in order to reach concentrations of:
    at. 0.25 to 5 g / l,
    b. 0.5 to 3.5 g / l,
    vs. 0.8 to 3 g / l
    Dilution of polymer solution in water in industrial units must be carried out very quickly: the solution must be perfectly homogeneous directly at the outlet of the dilution unit.
    Pilot tests for different types of static mixer did not reveal any dilution equipment meeting this homogeneity criterion. The non-Newtonian nature of the concentrated and dilute solutions makes it impossible to predict the mixture.
    Furthermore, the option of increasing the number of elements of static mixers, a potential solution, is not applicable under industrial conditions because it increases the pressure drop in line prohibitively. No equipment meets these criteria on the market.
    1.3 Increase in the quality of dilution
    Customer quality assurance and quality control (QA / QC) requirements for diluting diluted PAM solutions for EOR or WT applications are as follows:
    • Homogenization criteria: viscosity of the polymer solution o Protocols and equipment:
    SNF: KINEXUS Pro + viscometer / Flat cone: 2 ° / Shear: 7 s-1 at 25 ° C, o Measurement: monitoring of the viscosity directly downstream of the dilution unit for different dilutions of concentrated PAM solution;
    • Filterability criteria of the diluted PAM solution:
    o SNF Protocol: QC-5061
    In order to meet these criteria directly at the outlet of the dilution unit, the solution must be perfectly homogeneous at the envisaged concentration.
    The objective of the innovation is to allow the diluted PAM solution to meet these homogeneity criteria as soon as it leaves the dissolution unit.
    Usage context
    2.1 Measurement methods: Definition of homogeneity
    2.1.1 Homogeneity criteria
    Measuring the homogeneity of the diluted PAM solution, continuously and reliably, requires a rapid measurement criterion, which is the case with conductimetry.
    The homogeneity of the PAM solution is exactly proportional to the saline homogeneity of the solution.
    The dilution water and the concentrated PAM solution were adjusted to different salinities and therefore different conductivities. The mixture of these two solutions results in a mixture of clean salinity and therefore of clean conductivity.
    The homogeneity of the solution is defined by the standard deviation on the measurement of continuous conductivity of the diluted PAM solution.
    2.1.2 Description of conductimetric measurement / standard deviation
    It was therefore chosen to continuously measure the conductivity of the diluted solution and to evaluate the standard deviation. The more the standard deviation tends towards 0, the more homogeneous the diluted solution.
    Description of the measuring equipment:
    • Yokogawa ISC40 type probe, measures between 0.5 pS and 2 S / cm.
    • Human-machine interface: OEXAxt ISC450
    2.2 Fields of application
    2.2.1 Mobile dissolution units
    2.21.1 Oil application: offshore / onshore (Offshore / onshore)
    2.2.1.1.1 Advantages in terms of the model (design) of the installations
    In the context of enhanced oil recovery at sea (EOR offshore) application, the homogeneous concentration of the dilute polymer solution must be obtained from the solid polymer in powder form, in a lapse of shortest possible time and reduced footprint, in order to:
    • Reduce the dilution time of the concentrated polymer solution • Reduce the size of the dilution equipment • Reduce the distance to the injection points
    In addition, this diluted PAM solution can be distributed over different injection areas. The concentration of the polymer solution must be perfectly identical and therefore the solution perfectly homogeneous from the outlet of the dilution unit in order to be it in the distribution network.
    2.2.1.1.2 Benefits in terms of quality assurance and control (QA / QC)
    The quality requirements of the polymer solutions injected relate to:
    • the precision of the concentration injected • the filterability of the solution injected • the homogeneity of the solution injected
    Making this homogenization available at the end of the dilution unit allows both:
    · Qualitatively control this solution on the dilution unit.
    • respond positively to these requirements.
    2.2.1.2 Water treatment and mining applications
    In the case of municipal, industrial and mining water treatment applications, the same homogeneity constraints apply to this diluted PAM solution, to which the following constraints must be added:
    · High concentrated solution viscosities, the dilution water being mostly non-saline.
    • Significant robustness constraints.
    Description of the innovation: injection equipment
    3.1 Diagram (Flowsheet) • Figure 5 shows the diagram (flowsheet) of the dissolution / dilution of PAM, in which the dilution part is inscribed.
    • The dilution scheme in which the new injection nozzle is fitted is illustrated in Figure 6
    FIG. 6 illustrates the diagram (Flowsheet) of the dilution unit for the concentrated MAP solution, positioning of the new injection cane.
    3.2 Typical assembly
    The purpose of the injection equipment is to intimately bring the dilution water into contact with the concentrated polymer solution. It is followed by an in-line static mixing step having as main characteristics: an increased residence time and a finalization of the dispersion without shearing.
    3.2.1 Sizing elements of the injection equipment
    The injection equipment consists of:
    Item Description Characteristics AT Dilution water introduction cane Differential pressure (DP) induced by the rod: from 0.2 to 5 barg Velocity: from 2 to 10 m / sInternal perforated stainless steel tubePerforations: 0.5 to 5 mm in diameter B Nozzles for the introduction of concentrated polymer solution Number of tappings: from 1 to 8Velocity: from 1 to 4 times the velocity in the mixing chamber Tangential introductions distributed radially VS Mixing chamber Velocity: 1 to 5 m / sInjection chamber in the annular space
    3.2.2 Typical diagram of typical injection equipment
    Figure 7 illustrates the typical assembly diagram of the rod and the injection chamber.
    3.3 Perforated cane only
    The perforated cane has the following characteristics:
    • Rod: tube, closed at its end, • Rod diameter sized to respect a velocity of 1 to 5 m / s in the annular space of the injection chamber, • Perforations over the entire cylindrical surface, • Diameter drilling perforations: from 0.5 to 1.5 mm, • Circular perforations at 60 ° or 90 °, • No perforations: from 5 to 25 mm.
    3.4 Perforated cane with filling
    For defined characteristics of the injection pipe (§ 5.2), the annular space between the perforated pipe can be filled with either:
    3.4.1 Ball filling
    This filling of balls fills 20 to 80% of the annular space of the injection chamber (space between the casing and the injection rod)
    These balls have the following characteristics:
    • Diameter from: 2 to 6 mm, • Density from: 0.9 to 1.4, • Material: compatibility with the solution.
    Figure 8 illustrates the typical assembly diagram of the rod and the injection chamber, with packing of balls in the annular space.
    3.4.2 Packing turns
    A stainless steel coil is inserted in the annular space between 80 and 150% of the length of the injection rod.
    The coil has the characteristics:
    Item Feature Values AT No spire Between 20 and 50 mm B Internal diameter Adjusted to the external diameter of the injection rod VS External diameter Adjusted to the internal diameter of the injection chamber Profile of the coil Circular
    Figure 9 illustrates the diagram of the turn fitting between the cane and the injection chamber.
    FIG. 10 illustrates the typical assembly diagram of the rod and the injection chamber, with filling (packing) of turns in the annular space
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    1 / Dilution unit for a concentrated PAM type polymer solution comprising injection equipment followed by a static mixer.
    [2" id="c-fr-0002]
    2 / Unit according to claim 1, characterized in that the injection equipment comprises a cane for introducing dilution water, nozzles for the introduction of concentrated polymer solution, a mixing chamber.
    [3" id="c-fr-0003]
    3 / unit according to claim 2, characterized in that the mixing chamber is an injection chamber having an annular space.
    [4" id="c-fr-0004]
    4 / Unit according to claim 2, characterized in that the rod for introducing dilution water has perforations over the entire cylindrical surface.
    [5" id="c-fr-0005]
    5 / unit according to claim 4, characterized in that the perforations have a drilling diameter between 0.5 to 1.5 mm.
    [6" id="c-fr-0006]
    6 / Unit according to one of claims 4 or 5, characterized in that the perforations are circular at 60 ° or 90 °.
    [7" id="c-fr-0007]
    7 / Unit according to one of claims 2 to 6, characterized in that the annular space between the perforated rod is filled with balls occupying 20 to 80% of said annular space.
    [8" id="c-fr-0008]
    8 / Unit according to one of claims 2 to 6, characterized in that a stainless steel turn is inserted in the annular space between the perforated cane and represents between 80 and 150% of the length of the injection cane.
    1/5
    2- stage of dilution in PAM water
    PAM powder
    Low pressure water
    PAM dissolution unit
    High pressure pump
    High pressure pump
    Mixer
    Static
    Mixer
    Static
    1- dan dissolution step;
    WFP water
    High pressure water
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    同族专利:
    公开号 | 公开日
    FR3063230B1|2021-04-30|
    引用文献:
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    WO2011152876A1|2010-06-04|2011-12-08|Dow Global Technologies Llc|Solubilizing surfactants into supercritical carbon dioxide for enhanced oil recovery|
    US20160230592A1|2013-10-02|2016-08-11|Aerocore Technologies Llc|Cleaning method for jet engine|
    US20150190766A1|2014-01-09|2015-07-09|Pulsafeeder, Inc.|Polymer static mixer|
    US20160136591A1|2014-11-19|2016-05-19|Simchem Inc.|Adhesive-air infuser device and method of using the same|
    WO2016183335A1|2015-05-13|2016-11-17|Ecolab Usa Inc.|Apparatus and method for inverting polymer latices|ES2812279A1|2019-09-16|2021-03-16|Dosage S L|Equipment for the preparation and dosage of liquid polyelectrolytes |
    WO2021209149A1|2020-04-17|2021-10-21|Basf Se|Process and devices for making aqueous wellbore treating fluids|
    WO2021209148A1|2020-04-17|2021-10-21|Basf Se|Process for making an aqueous injection fluid|
    WO2021209150A1|2020-04-17|2021-10-21|Basf Se|Processes and devices for making aqueous wellbore treating fluids|
    法律状态:
    2018-02-26| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-31| PLSC| Publication of the preliminary search report|Effective date: 20180831 |
    2020-02-20| PLFP| Fee payment|Year of fee payment: 4 |
    2021-02-25| PLFP| Fee payment|Year of fee payment: 5 |
    2022-02-22| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1751489|2017-02-24|
    FR1751489A|FR3063230B1|2017-02-24|2017-02-24|LIQUID INJECTION ROD - LIQUID FOR DILUTION OF POLYMER SOLUTION|FR1751489A| FR3063230B1|2017-02-24|2017-02-24|LIQUID INJECTION ROD - LIQUID FOR DILUTION OF POLYMER SOLUTION|
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