WO2019193849A1 - Dispositif de séparation par coagulation, procédé de séparation par coagulation, dispositif de mesure de la qualité d'eau, procédé de mesure de la qualité d'eau, système de traitement de séparation par coagulation et procédé de traitement de séparation par coagulation - Google Patents

Dispositif de séparation par coagulation, procédé de séparation par coagulation, dispositif de mesure de la qualité d'eau, procédé de mesure de la qualité d'eau, système de traitement de séparation par coagulation et procédé de traitement de séparation par coagulation Download PDF

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WO2019193849A1
WO2019193849A1 PCT/JP2019/005856 JP2019005856W WO2019193849A1 WO 2019193849 A1 WO2019193849 A1 WO 2019193849A1 JP 2019005856 W JP2019005856 W JP 2019005856W WO 2019193849 A1 WO2019193849 A1 WO 2019193849A1
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separation
water
evaluation
treated
separating
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PCT/JP2019/005856
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English (en)
Japanese (ja)
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佳介 瀧口
大江　太郎
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オルガノ株式会社
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    • 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
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • 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
    • B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water

Definitions

  • the present invention relates to a flocculation apparatus, a flocculation separation method, a water quality measurement device, a water quality measurement method, a flocculation separation treatment system, and a flocculation separation treatment method, which form flocs in water to be treated containing a flocculant and separate the formed flocs.
  • a flocculation apparatus a flocculation separation method, a water quality measurement device, a water quality measurement method, a flocculation separation treatment system, and a flocculation separation treatment method, which form flocs in water to be treated containing a flocculant and separate the formed flocs.
  • a flocculant such as an inorganic flocculant or a polymer flocculant is added to the water to be treated to agglomerate suspended substances or the like to form flocs, and a solid separation process is performed.
  • the agglomeration conditions in the agglomeration / separation process are conventionally tests using a test device called a jar tester equipped with a plurality of stirring blades capable of controlling the number of rotations to determine the optimum addition amount of a flocculant for agglomeration and solid-liquid separation (jar) Test) (see Patent Document 1).
  • a test device called a jar tester equipped with a plurality of stirring blades capable of controlling the number of rotations to determine the optimum addition amount of a flocculant for agglomeration and solid-liquid separation (jar) Test
  • Patent Document 1 An auto jar tester that automates this jar test is also known (see Patent Document 2).
  • the auto jar tester has a problem that it has a large number of parts, has poor maintainability, and is expensive.
  • the jar tester is capable of testing 4 to 6 conditions at the same time, but in one test, it usually takes a total of 30 minutes to mix the flocculant, form flock, separate by gravity, and measure the treated water quality. It takes more than that.
  • An object of the present invention is to provide a flocculation separation device and a flocculation separation method capable of performing flocculation separation at high speed, and a water quality measurement device and a water quality measurement method using the flocculation separation device or the flocculation separation method.
  • Another object of the present invention is to provide a flocculation / separation treatment system and a flocculation / separation treatment method that can follow even if there is a sudden change in the quality of the water to be treated.
  • the present invention includes a flocculant addition means for adding a flocculant to the water to be treated, and a separation means for separating the concentrated water containing floc formed by adding the flocculant and the treated water.
  • the separation means is a coagulation separation device having a flow path including a wall surface having a curvature.
  • the flow path in the separation means preferably has a curvature with a Dean number of 10 to 500.
  • the coagulation / separation apparatus preferably further comprises mixing means for mixing the water to be treated and the coagulant and floc forming means for forming flocs in the mixed liquid mixture.
  • the present invention comprises the aggregating and separating apparatus and treated water quality measuring means for measuring the quality of the treated water, and the treated water quality measuring means comprises turbidity, chromaticity, organic substance concentration, particle size, and particle size distribution. It is a water quality measuring device which is a means for measuring at least one of the above.
  • the treated water quality measuring means is preferably means for measuring at least one of the particle size and the particle size distribution by image analysis.
  • the present invention includes a flocculant addition step of adding a flocculant to the water to be treated, and a separation step of separating into concentrated water containing floc formed by adding the flocculant and treated water, and the separation
  • the process is a coagulation separation method performed using a flow path including a wall surface having a curvature.
  • the flow path used in the separating step preferably has a curvature with a Dean number of 10 to 500.
  • the coagulation / separation method preferably further includes a mixing step of mixing the water to be treated and the flocculant, and a flock forming step of forming a flock in the mixed liquid mixture.
  • the present invention includes the coagulation separation method and a treated water quality measurement step for measuring the quality of the treated water.
  • turbidity, chromaticity, organic substance concentration, particle size, and particle size distribution It is the water quality measuring method which measures at least 1 of these.
  • the treatment water quality measurement step in the water quality measurement method it is preferable to measure at least one of the particle size and the particle size distribution by image analysis.
  • the present invention relates to a mixing means for mixing the water to be treated and the flocculant, a floc forming means for forming a floc in the mixed admixture, a concentrated water containing the floc formed and a treatment.
  • a flocculation / separation treatment apparatus comprising a separation means for separating water; and a flocculation / separation evaluation means for evaluating the flocculation / separation performance using a part of the water to be treated. Based on the flocculation / separation property evaluated by the evaluation means, the flocculation / separation treatment condition in the flocculation / separation processing apparatus is controlled, and the flocculation / separation property evaluation means is for mixing a part of the water to be treated and the flocculant.
  • Evaluation including mixing means for evaluation, evaluation flock forming means for forming a flock in the mixed liquid for evaluation mixed by the mixing means for evaluation, and floc formed by the floc forming means for evaluation
  • a evaluation separating means for separating the evaluation for treated water and concentrated water
  • a evaluation process water quality measuring means for measuring the quality of the evaluation process water, a flocculation separation process system.
  • the separation means for evaluation has a flow path including a wall surface having a curvature.
  • the present invention is divided into a mixing step of mixing the water to be treated and the flocculant, a flock forming step of forming flocks in the mixed liquid mixture, and concentrated water and treated water containing the formed flocks.
  • a flocculating / separating process comprising: a flocculating / separating process that includes: a flocculating / separating process that includes: a flocculating / separating process that includes a part of the water to be treated;
  • the aggregating / separating process conditions in the aggregating / separating process are controlled, and the aggregating / separating property evaluation step includes an evaluation mixing step for mixing a part of the water to be treated and a flocculant, and the mixing for evaluation Evaluation floc forming step for forming flocs in the admixture for evaluation mixed in the step, and evaluation for separating into evaluation concentrated water containing flocs formed by the evaluation floc forming step and treated water for evaluation Comprising a separation step, the evaluation process water quality measurement step
  • the evaluation separation step is performed using a flow path including a wall surface having a curvature.
  • a flocculation separation device and a flocculation separation method capable of performing flocculation separation at high speed, and a water quality measurement device and a water quality measurement method using the flocculation separation device or the flocculation separation method.
  • the water quality measuring apparatus separates into a flocculant adding means for adding a flocculant to the water to be treated, and concentrated water containing floc formed by adding the flocculant and treated water.
  • a flocculating / separating device comprising: a separation means for treating; a treated water quality measuring means for measuring the quality of the treated water.
  • the flocculation / separation apparatus may further include a mixing unit for mixing the water to be treated and the flocculant, and a floc forming unit for forming a floc in the mixed liquid.
  • the aggregating and separating apparatus has a flow path including a wall surface having a curvature. An outline of an example of the water quality measuring apparatus according to the present embodiment is shown in FIG. 1 and the configuration thereof will be described.
  • the water quality measuring apparatus 1 shown in FIG. 1 includes, for example, a flocculant addition pipe 24 as a flocculant addition means for adding a flocculant to the water to be treated, and a line mixer as a mixing means for mixing the flocculant and the water to be treated. 10, a floc forming means for forming a floc in the mixed liquid mixture, and a separating means for separating the formed floc containing concentrated water and treated water, for example, a pipe having a flow path is formed in a spiral shape.
  • a coagulation / separation device 2 having a bent channel 12; and a treated water quality measuring device 14 as treated water quality measuring means for measuring the quality of treated water.
  • the bent channel 12 has a flow path including a wall surface having a curvature.
  • a water pipe 16 to be treated is connected to the inlet of the line mixer 10.
  • the outlet of the line mixer 10 and the mixed liquid inlet of the bent channel 12 are connected by a mixed liquid pipe 18.
  • a treated water pipe 20 is connected to the treated water outlet of the bent channel 12, and a concentrated water pipe 22 is connected to the concentrated water outlet.
  • a flocculant addition pipe 24 is connected to the treated water pipe 16.
  • a treated water quality measuring device 14 is installed in the treated water pipe 20.
  • the water to be treated containing suspended substances and the like is sent to the line mixer 10 through the water pipe 16 to be treated.
  • the flocculant is added to the water to be treated through the flocculant addition pipe 24 in the water to be treated 16 (flocculating agent addition step), and the flocculant and the water to be treated are agitated and mixed in the line mixer 10. (Mixing process).
  • the mixed solution in which the flocculant and the water to be treated are mixed is sent to the bending channel 12 through the mixed solution pipe 18.
  • the bent channel 12 includes a mixed liquid inlet for flowing in the mixed liquid, a spiral channel in which a pipe having, for example, a rectangular flow path through which the fluid flows is formed in a spiral shape, and a drain for treating water. And a treated water outlet separated from the outer peripheral side of the flow path and a concentrated water outlet separated from the inner peripheral side of the flow path for discharging concentrated water, for example.
  • FIG. 2 shows a cross section of the flow path of the bent channel 12.
  • the bent channel 12 may have a treated water outlet separated from the inner peripheral side of the flow path and a concentrated water outlet separated from the outer peripheral side of the flow path.
  • the bending channel 12 adjusts the balance of the density of the particles in the bending channel 12, the flux of the fluid flowing in the flow path, the curvature of the flow path, etc., thereby adjusting the density difference between the floc and the liquid, gravity, and hydrodynamics.
  • the flocs can be formed and separated by the mechanical action, and further, the flocculant and the water to be treated can be mixed, and the flocs can be formed and separated.
  • the admixture was introduced into the flow path of the spiral channel from the admixture inlet of the bent channel 12, and stirred by hydrodynamic action in the flow path, and formed by mixing and coagulating the flocculant with the water to be treated. Fine flocs collide with each other and the floc particle diameter grows (floc formation step). As it flows through the flow path, it is separated into treated water on the outer peripheral side of the flow path and concentrated water on the inner peripheral side of the flow path due to the density difference between water and flocs, gravity, and hydrodynamic action. (Separation process). The concentrated water is discharged through the concentrated water pipe 22, and the treated water is discharged through the treated water pipe 20 (the above is the coagulation separation process).
  • the treated water quality is measured by the treated water quality measuring device 14 (treated water quality measuring step).
  • the flocculation separation method and the flocculation separation apparatus 2 can perform flocculation separation at high speed.
  • the water quality measuring device 1 including the flocculating / separating device 2 as a jar tester or an auto jar tester, it is possible to speed up the jar test, and quickly based on the quality of the treated water measured by the treated water quality measuring device 14.
  • Aggregation conditions and the like of the aggregation separation process can be determined. For this reason, even if there is a change in the quality of the water to be treated, and even if there is a sudden change in the quality of the water to be treated, the optimum coagulation conditions can be followed.
  • the jar test can be performed in-line, and optimum coagulation separation processing conditions can be determined continuously.
  • the mixing of the flocculant and the water to be treated is performed using the line mixer 10, but instead of the line mixer 10, a stirring apparatus having stirring blades and the like. May be used as the mixing means, or the same bent channel 12 as the flock forming means and the separating means, or a bent channel different from the flock forming means and the separating means may be used as the mixing means.
  • the separation means is not particularly limited as long as it has a flow path including a wall surface having a curvature.
  • the separation means is, for example, a bent channel in which a pipe having a flow path including a wall surface having a curvature is formed in a spiral shape, but in order to form a Dean vortex, the cross section of the flow path is preferably rectangular. .
  • the flock forming means and the separating means are bent channels, but the mixing means, the flock forming means and the separating means may be bent channels. In other words, the flock formation step and the separation step are performed using a bent channel, but the mixing step, the flock formation step and the separation step may be performed using a bent channel.
  • the time required for the mixing step of mixing the flocculating agent with the water to be treated is, for example, about 1 second to 60 seconds, preferably about 5 seconds to 30 seconds, and includes the flocculating agent.
  • the time required for the floc forming step for forming flocs in the water to be treated is, for example, about 10 seconds to 10 minutes, preferably about 1 minute to 5 minutes, and the time required for the separation step for separating into concentrated water and treated water. Is, for example, about 1 second to 5 minutes, preferably about 1 second to 10 seconds, and the time required for the treatment water quality measurement step for measuring the quality of the treated water is, for example, about 1 second to 30 seconds. Therefore, the time required from the mixing step to the treated water quality measurement step is about 10 seconds to 3 minutes, preferably about 10 seconds to 60 seconds.
  • FIG. 5 shows an outline of an example of a conventional aggregation method determination method using a jar test.
  • the evaluation water quality measuring apparatus 100 includes an evaluation mixing tank 102 as an evaluation mixing means, an evaluation flock forming tank 104 as an evaluation flock forming means, and an evaluation solid-liquid separation apparatus 106 as an evaluation separating means.
  • a flocculant is added and mixed in the water to be treated in the mixing tank 102 for evaluation, flocs are formed in the floc forming tank 104 for evaluation, and precipitation or separation by gravity is performed in the solid-liquid separation apparatus 106 for evaluation.
  • Solid-liquid separation is performed, and it is separated into concentrated water and treated water.
  • the quality of the treated water is measured by the treated water quality measuring device 108. For example, in the jar test, it takes 3 minutes for mixing, 10 minutes for floc formation, 10 minutes for solid-liquid separation, 10 minutes for measurement of treated water, and a total of 33 minutes or more is required.
  • the processing time is significantly shortened as compared with the conventional jar test that requires 30 minutes or more.
  • the bend channel 12 preferably has a predetermined curvature, length, and width determined according to the purpose of flock formation and separation.
  • the curvature is expressed as the reciprocal of the radius of curvature.
  • the radius of curvature may be, for example, in the range of 1 to 15 mm, preferably in the range of 5 to 10 mm, the length may be in the range of, for example, 3 mm to 20 mm, and the width may be in the range of, for example, 0.1 to 1 mm.
  • the thickness may preferably be in the range of 0.5 to 1 mm.
  • the Dean number (De) may be, for example, in the range of 10 to 500, preferably 50 to 100.
  • the Dean number (De) is obtained by the following formula (see: https://en.wikipedia.org/wiki/Dean_number).
  • the specification of the bending channel that is optimal for floc separation varies depending on the floc properties (density, particle size, etc.), so it is desirable to determine it using flow analysis software.
  • Examples of the flow analysis software include “ANSYs Fluent” (ANSYS).
  • flocs can be formed and separated by adjusting the balance of the density of the particles in the bent channel 12, the flux of the fluid flowing in the flow path, the curvature of the flow path, and the like. It is possible to mix the agent with the water to be treated and to form and separate flocs.
  • flocs can be formed and separated in a continuous bend channel 12 by asymptotically starting from a small curvature in the bend channel 12 toward a curvature optimal for the separation. You may make the cross-sectional area of a flow path asymptotic toward the optimal value. In a narrow channel, the flux is high and agitation is performed, and separation is performed in a channel whose cross-sectional area is optimal for separation.
  • the shape of the flow path of the bent channel 12 is, for example, a rectangular shape or a cylindrical shape, and preferably a rectangular shape.
  • the flocculant at least one of an inorganic flocculant and a polymer flocculant is used.
  • inorganic flocculant examples include iron-based inorganic flocculants such as ferric chloride and polyferric sulfate, and aluminum-based inorganic flocculants such as aluminum sulfate and polyaluminum chloride (PAC).
  • iron-based inorganic flocculants such as ferric chloride and polyferric sulfate
  • aluminum-based inorganic flocculants such as aluminum sulfate and polyaluminum chloride (PAC).
  • the amount of the inorganic flocculant added is, for example, in the range of 1 to 100 mg / L.
  • the polymer flocculant is not particularly limited, such as a nonionic polymer flocculant, an anionic polymer flocculant, or a cationic polymer flocculant.
  • polyacrylamide, sodium polyacrylate, acrylamide examples thereof include acrylate copolymers, sodium acrylamide propanesulfonate, chitosan, dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate, and polyamidine.
  • the polymer flocculants may be used singly or in combination of two or more.
  • the amount of the polymer flocculant added is, for example, in the range of 0.1 to 2 mg / L.
  • pH adjustment may be performed as necessary (pH adjustment step).
  • the pH adjuster include acids such as hydrochloric acid and sulfuric acid, and alkalis such as sodium hydroxide.
  • the pH may be adjusted in the range of 4 to 11, for example.
  • the treated water quality measuring device 14 is not particularly limited as long as it can measure the quality of the treated water, but at least one of turbidity, chromaticity, organic substance concentration, particle size, and particle size distribution. Is preferably a device that measures at least one of the particle size and particle size distribution by image analysis.
  • the liquid temperature in the coagulation separation process is not particularly limited and is, for example, in the range of 15 to 35 ° C. Since the separability varies depending on the viscosity and the like, it is desirable to adjust the liquid temperature to be as constant as possible.
  • the water to be treated is water containing suspended substances, and examples thereof include river water, industrial water, and waste water.
  • the water to be treated having a suspended substance concentration of 1 to 10 mg / L can be removed at a rate of 90% to 99% by the coagulation separation method and the coagulation separation apparatus according to the present embodiment.
  • the mixing step, the flock formation step, and the separation step may be performed using bent channels, respectively. Such an example is shown in FIG.
  • the water quality measuring device 3 in FIG. 3 is formed with a bent channel 30 as a mixing means for mixing the water to be treated and the flocculant, and a bent channel 32 as a flock forming means for forming a flock in the mixed liquid.
  • a flocculating / separating device 4 having a bent channel 34 as a separating means for separating concentrated water containing floc and treated water; and a treated water quality measuring device 36 as treated water quality measuring means for measuring the quality of treated water.
  • the water pipe 38 to be treated is connected to the entrance of the bent channel 30.
  • the outlet of the bent channel 30 and the inlet of the bent channel 32 are connected by a mixed liquid pipe 40.
  • the outlet of the bent channel 32 and the inlet of the bent channel 34 are connected by an agglomerate pipe 42.
  • a treated water pipe 44 is connected to the treated water outlet of the bent channel 34, and a concentrated water pipe 46 is connected to the concentrated water outlet.
  • a flocculant addition pipe 48 is connected to the water pipe for treatment 38 as a flocculant addition means for adding a flocculant to the water to be treated.
  • a treated water quality measuring device 36 is installed in the treated water pipe 44.
  • the water to be treated containing suspended substances and the like is sent to the bending channel 30 through the water to be treated pipe 38.
  • the flocculant is added to the water to be treated through the flocculant addition pipe 48 (flocculating agent addition step), and is introduced from the inlet of the bent channel 30 into the flow path of the spiral channel.
  • the flocculant and the water to be treated are agitated and mixed (mixing step).
  • the mixed solution in which the flocculant and the water to be treated are mixed is sent to the bending channel 32 through the mixed solution pipe 40.
  • the mixed liquid is introduced into the flow path of the spiral channel from the entrance of the bent channel 32, and is stirred by the hydrodynamic action in the flow path, and the fine liquid formed by mixing and coagulating the flocculant with the water to be treated.
  • the flocs collide with each other and the floc particle diameter grows (floc formation step).
  • the aggregate liquid is sent to the bending channel 34 through the aggregate liquid pipe 42.
  • the agglomerated liquid is introduced into the flow path of the spiral channel from the entrance of the bent channel 34, and in the flow path, for example, treated water on the outer peripheral side of the flow path due to the density difference between water and flocs, gravity, and hydrodynamic action. And the concentrated water on the inner circumferential side of the flow path (separation step).
  • the concentrated water is discharged through the concentrated water pipe 46, and the treated water is discharged through the treated water pipe 44 (the above is the coagulation separation process).
  • the quality of the treated water is measured by the treated water quality measuring device 36 in the treated water pipe 44 (treated water quality measuring step).
  • the mixing means, the flock forming means and the separating means are each bent channels. That is, the mixing step, the flock formation step, and the separation step are each performed using a bent channel.
  • a bent channel 30 floc formation and separation can be performed in a continuous bent channel by asymptotically starting from a small curvature toward the optimum curvature for separation. You may make the cross-sectional area of a flow path asymptotic toward the optimal value.
  • the flux is high and agitation is performed, and separation is performed in a channel whose cross-sectional area is optimal for separation.
  • This aggregating and separating method and the aggregating / separating apparatus 4 can perform aggregating and separating at high speed.
  • the water quality measuring device 3 including the flocculating / separating device 4 as a jar tester or an auto jar tester, it becomes possible to speed up the jar test, and quickly based on the quality of the treated water measured by the treated water quality measuring device 36.
  • Aggregation conditions and the like of the aggregation separation process can be determined. For this reason, even if there is a change in the quality of the water to be treated, and even if there is a sudden change in the quality of the water to be treated, the optimum coagulation conditions can be followed.
  • the jar test can be performed in-line, and optimum coagulation separation processing conditions can be determined continuously.
  • the time required for the mixing step of mixing the flocculating agent and the water to be treated is, for example, about 1 second to 60 seconds, preferably about 5 seconds to 30 seconds, and includes the flocculating agent.
  • the time required for the floc forming step for forming flocs in the water to be treated is, for example, about 10 seconds to 10 minutes, preferably about 1 minute to 5 minutes, and the time required for the separation step for separating into concentrated water and treated water. Is, for example, about 1 second to 5 minutes, preferably about 1 second to 10 seconds, and the time required for the treatment water quality measurement step for measuring the quality of the treated water is, for example, about 1 second to 30 seconds. Therefore, the time required from the mixing step to the treated water quality measurement step is about 10 seconds to 3 minutes, preferably about 10 seconds to 60 seconds.
  • the water to be treated is sampled from the inlet water of the actual flocculation separation processing device, and the treated water quality of the flocculation separation device Based on the measurement results, the aggregation conditions of the aggregation separation processing apparatus may be controlled.
  • the water to be treated of the flocculation / separation apparatus 2 in FIG. 1 is sampled from the inlet water of the actual flocculation / separation processing apparatus, and the flocculation of the flocculation / separation processing apparatus is based on the measurement result of the treated water quality of the flocculation / separation apparatus 2.
  • An example of controlling the conditions is shown in FIG.
  • the flocculation / separation processing apparatus 5 in the flocculation / separation processing system 7 includes a mixing tank 52 as a mixing means, a flock forming tank 54 as a flock forming means, a solid-liquid separator 56 as a separating means, and a treated water quality measuring apparatus as a treated water quality measuring means. 58.
  • the coagulation separation processing system 7 may include a control device 50 as control means.
  • the water quality measuring apparatus 1 that is a flocculating / separating evaluation means is an evaluation that forms a floc in a mixed liquid for evaluation mixed with a line mixer 10 as an evaluation mixing means for mixing a flocculant and a part of water to be treated. And a bent channel 12 in which a pipe having a flow path is formed in a spiral shape as an evaluation floc forming means and an evaluation separating means for separating the evaluation flocs containing the formed floc and the evaluation treated water.
  • a coagulation separation device 2; and a treated water quality measuring device 14 as an evaluation treated water quality measuring means for measuring the quality of the treated water for evaluation.
  • the water pipe 60 to be treated is connected to the inlet of the mixing tank 52.
  • the outlet of the mixing tank 52 and the inlet of the flock forming tank 54 are connected by a mixing liquid pipe 62.
  • the outlet of the flock forming tank 54 and the inlet of the solid-liquid separation device 56 are connected by a condensed liquid pipe 64.
  • a treated water pipe 66 is connected to the outlet of the solid-liquid separator 56.
  • a flocculant addition pipe 68 is connected to the mixing tank 52 as a flocculant addition means for adding the flocculant to the water to be treated.
  • a treated water quality measuring device 58 is installed in the treated water pipe 66.
  • the treated water pipe 16 branched from the treated water pipe 60 is connected to the inlet of the line mixer 10.
  • the outlet of the line mixer 10 and the mixed liquid inlet of the bent channel 12 are connected by a mixed liquid pipe 18.
  • a treated water pipe 20 is connected to the treated water outlet of the bent channel 12, and a concentrated water pipe 22 is connected to the concentrated water outlet.
  • a flocculant addition pipe 24 is connected to the water pipe 16 to be treated as a flocculant addition means for adding a flocculant to the water to be treated.
  • a treated water quality measuring device 14 is installed in the treated water pipe 20.
  • the control device 50 is connected to the treated water quality measuring device 14 and a flocculant addition amount adjusting means (not shown) for adjusting the addition amount of the flocculant installed in the flocculant addition pipe 68 by electrical connection or the like. .
  • the water to be treated containing suspended substances or the like is sent to the mixing tank 52 through the water pipe 60 to be treated, and the flocculant is added to the water to be treated in the mixing tank 52. It is added through the addition pipe 68 and mixed (mixing step).
  • the mixed liquid is fed to the flock forming tank 54 through the mixed liquid piping 62, and a flock is formed in the flock forming tank 54 (a flock forming step).
  • the flocculated liquid is fed to the solid-liquid separator 56 through the flocculated liquid pipe 64, where the solid-liquid separation is performed by gravity separation by sedimentation, filtration, etc., and separated into concentrated water and treated water. (Separation process).
  • the treated water is discharged through the treated water pipe 66 and the quality of the treated water is measured by the treated water quality measuring device 58.
  • the treated water branched from the treated water pipe 60 is fed to the line mixer 10 through the treated water pipe 16.
  • the flocculant is added to the water to be treated through the flocculant addition pipe 24 (evaluation flocculant addition step), and in the line mixer 10, the flocculant and the water to be treated are stirred.
  • Mixed evaluation mixing step.
  • the evaluation mixed liquid in which the flocculant and the water to be treated are mixed is sent to the bending channel 12 through the mixed liquid pipe 18.
  • the evaluation admixture is introduced into the flow path of the spiral channel from the admixture inlet of the bent channel 12, and the fine flocs formed by the mixing and agglomeration of the flocculant with the water to be treated collide with each other.
  • the particle diameter grows (evaluation floc forming step).
  • evaluation floc forming step As it flows through the flow path, it is separated into evaluation treated water on the outer circumferential side of the flow path and concentrated water for evaluation on the inner circumferential side of the flow path (evaluation separation step).
  • the concentrated water for evaluation is discharged through the concentrated water pipe 22, and the treated water for evaluation is discharged through the treated water pipe 20 (the above is the aggregation and separation process for evaluation).
  • the quality of the treated water for evaluation is measured by the treated water quality measuring device 14 (evaluated treated water quality measuring step).
  • the controller 50 controls, for example, a flocculant addition amount adjusting means installed in the flocculant addition pipe 68, for example, a pump, and a mixing tank.
  • the amount of flocculant added at 52 is controlled.
  • the water quality measuring device 1 can speed up the jar test.
  • the amount of the flocculant added in the mixing tank 52 is controlled by the aggregation condition of the aggregation separation process determined based on the quality of the evaluation treated water measured by the treated water quality measuring device 14.
  • the optimum coagulation conditions can be followed, so that the deterioration of the treated water quality is suppressed.
  • the jar test can be performed in-line, the optimum coagulation separation process condition can be determined continuously, and the coagulation separation process condition of the coagulation separation processing apparatus 5 can be controlled.
  • the water quality measurement device 1 including the bent channel 12 as the flocculation / separation property evaluation unit is illustrated, but the present invention is not limited thereto, and for example, the water quality measurement device 3 may be used. It may be a water quality measuring device that is smaller than an actual flocculation separation processing apparatus and includes an evaluation flocculation separation apparatus including an evaluation mixing tank, an evaluation flock formation tank, an evaluation solid-liquid separation apparatus, and the like.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

L'invention concerne un dispositif de séparation par coagulation et un procédé de séparation par coagulation avec lesquels une séparation par coagulation peut être effectuée à grande vitesse, ainsi qu'un dispositif de mesure de traitement d'eau et un procédé de mesure de traitement d'eau utilisant ledit dispositif de séparation par coagulation ou ledit procédé de séparation par coagulation. Un dispositif de mesure de la qualité de l'eau (1) comprend : un dispositif de séparation par coagulation (2) qui est pourvu d'un moyen d'ajout de coagulant pour ajouter un coagulant à l'eau à traiter, et un moyen de séparation pour séparer en eau concentrée et en eau traitée, ladite eau concentrée comprenant des flocs qui ont été formés par l'ajout du coagulant; et un dispositif de mesure de qualité d'eau traitée (14) pour mesurer la qualité de l'eau traitée, le moyen de séparation étant, par exemple, un canal incurvé (12) dans lequel un tuyau qui a un chemin d'écoulement comprenant une surface de paroi ayant une courbure est formé en une forme en spirale.
PCT/JP2019/005856 2018-04-05 2019-02-18 Dispositif de séparation par coagulation, procédé de séparation par coagulation, dispositif de mesure de la qualité d'eau, procédé de mesure de la qualité d'eau, système de traitement de séparation par coagulation et procédé de traitement de séparation par coagulation WO2019193849A1 (fr)

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JP2018-072999 2018-04-05
JP2018072999A JP7233848B2 (ja) 2018-04-05 2018-04-05 凝集分離制御装置、凝集分離制御方法、凝集分離処理システム、および凝集分離処理方法

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Cited By (2)

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WO2020122157A1 (fr) * 2018-12-14 2020-06-18 オルガノ株式会社 Dispositif de séparation solide-liquide, procédé de séparation solide-liquide, dispositif de mesure de la qualité de l'eau et procédé de mesure de la qualité de l'eau
WO2021214755A1 (fr) * 2020-04-21 2021-10-28 Elad Technologies (L.S.) Ltd Système et procédé de commande de processus continu d'un processus de séparation de contaminants aqueux

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JP2009113035A (ja) * 2007-11-07 2009-05-28 Palo Alto Research Center Inc 流体から中立浮力粒子を分離するシステムおよび方法
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JP5208061B2 (ja) * 2009-06-29 2013-06-12 株式会社日立製作所 凝集剤注入制御システム
US8208138B2 (en) * 2009-09-24 2012-06-26 University Of Cincinnati Spiral microchannel particle separators, straight microchannel particle separators, and continuous particle separator and detector systems
JP6674260B2 (ja) * 2016-01-05 2020-04-01 水ｉｎｇ株式会社 凝集剤の注入率決定方法および凝集剤の注入率決定装置

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JPH05146608A (ja) * 1991-11-27 1993-06-15 Kawasaki Heavy Ind Ltd 凝集剤の注入制御方法及び装置
JP2009113035A (ja) * 2007-11-07 2009-05-28 Palo Alto Research Center Inc 流体から中立浮力粒子を分離するシステムおよび方法
JP2010284644A (ja) * 2009-06-12 2010-12-24 Palo Alto Research Center Inc 流体処理システムによって流体流を処理する方法および流体流処理システム
JP2011156529A (ja) * 2009-10-30 2011-08-18 Mitsuyoshi Yamazaki 凝集剤注入量決定装置および凝集剤注入量制御システム
JP2016526479A (ja) * 2013-06-14 2016-09-05 パロ・アルト・リサーチ・センター・インコーポレーテッドＰａｌｏ Ａｌｔｏ Ｒｅｓｅａｒｃｈ Ｃｅｎｔｅｒ Ｉｎｃｏｒｐｏｒａｔｅｄ 高アスペクト比のチャネルを使用する流体力学的分離
WO2017168054A1 (fr) * 2016-04-01 2017-10-05 Kemira Oyj Procédé et système pour optimiser la coagulation et/ou la floculation dans un processus de traitement de l'eau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020122157A1 (fr) * 2018-12-14 2020-06-18 オルガノ株式会社 Dispositif de séparation solide-liquide, procédé de séparation solide-liquide, dispositif de mesure de la qualité de l'eau et procédé de mesure de la qualité de l'eau
WO2021214755A1 (fr) * 2020-04-21 2021-10-28 Elad Technologies (L.S.) Ltd Système et procédé de commande de processus continu d'un processus de séparation de contaminants aqueux

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