WO2015162773A1 - Dispositif de separation d'emulsion - Google Patents

Dispositif de separation d'emulsion Download PDF

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Publication number
WO2015162773A1
WO2015162773A1 PCT/JP2014/061649 JP2014061649W WO2015162773A1 WO 2015162773 A1 WO2015162773 A1 WO 2015162773A1 JP 2014061649 W JP2014061649 W JP 2014061649W WO 2015162773 A1 WO2015162773 A1 WO 2015162773A1
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WIPO (PCT)
Prior art keywords
emulsion
ultrasonic vibration
flow path
flow
discharge port
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PCT/JP2014/061649
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English (en)
Japanese (ja)
Inventor
琢也 神林
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株式会社日立製作所
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Priority to PCT/JP2014/061649 priority Critical patent/WO2015162773A1/fr
Publication of WO2015162773A1 publication Critical patent/WO2015162773A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations

Definitions

  • the present invention relates to a technique for separating an emulsion.
  • the present invention also relates to an emulsion separator using ultrasonic waves.
  • a pair of an ultrasonic transducer and a reflector is arranged through a flow path portion through which the emulsion flows, and functions as an external drive control circuit. It has a generator etc.
  • the function generator is a waveform generator that generates a control waveform signal to be given to the ultrasonic transducer.
  • the emulsion separator generates a sound field by ultrasonic waves between the ultrasonic transducer and the reflection plate by applying a waveform signal to the ultrasonic transducer, and applies an external force to the droplets in the flow path. This separates the emulsion.
  • Patent Document 1 Japanese Patent Document 1
  • JP-A-2004-24959 JP-A-10-109283
  • Japanese Patent Application Laid-Open No. H10-228561 describes that “when a micro object in a liquid medium 12 is captured and aligned at a half-wavelength interval at a node of sound pressure in a standing wave sound field, the back electrode of the ultrasonic transducer 16 is independently A plurality of strip-shaped electrode pieces 34 arranged in parallel with each other, a voltage is applied to a selected part of the electrode pieces 34 and driven to emit ultrasonic waves.
  • a standing sound field is formed between the drive electrode piece arrangement portion of the ultrasonic transducer 16 and the reflector 18, while the electrode piece 34 to which such a voltage is applied is electrically switched to the adjacent electrode piece 34.
  • the driving portion of the ultrasonic transducer is moved to move the standing wave sound field, and the captured micro object is moved along the arrangement direction of the electrode pieces 34 (see summary).
  • Patent Document 2 states that “in a flow path filled with a liquid medium, an ultrasonic vibrator and a reflector are installed in parallel along the flow path, and the ultrasonic vibrator is driven by a predetermined electrical signal to emit radiation. The reflected ultrasonic wave is reflected by a reflector, and a minute object dispersed in a liquid medium is captured in a node of sound pressure of a standing wave sound field generated in a flow path or an antinode of sound pressure, Ultrasonic non-contact filtering method and apparatus thereof (see summary) ".
  • the emulsion separator described in any of the above-mentioned prior art documents uses solid waves or droplets in a suspension or emulsion in a non-contact manner using ultrasonic waves generated from an ultrasonic vibrator. However, no consideration is given to the processing operation during operation.
  • an aqueous component may be mixed when recovering droplets with a large amount of oil component, and a high density liquid is obtained by mixing an aqueous component with droplets with a high density of oil component. Drops are difficult to collect. Therefore, there is a demand for a discharge port with good recovery efficiency.
  • an oily component and an aqueous component adhere to the inner wall in the emulsion separation device.
  • an aqueous component adheres to the upper side of the emulsion separator (the side on which the oily component after separation floats)
  • it is difficult to remove and move the attached aqueous component since it is difficult to remove and move the oily component adhering to the lower side of the separated and settled aqueous component, there is a need for a device that does not stick to the inner wall portion in the emulsion separator. Yes.
  • the emulsion separator when the droplets in the liquid are separated from the emulsion and separated into at least two kinds of liquids, the acoustic flow suddenly occurs, Although the sound field is disturbed, the liquid in the tank is agitated, and thus there is a problem that the separation performance is deteriorated.
  • these problems are not considered in the above-mentioned literature.
  • the influence by the said acoustic flow occurs also at the time of a single operation, it is more remarkable at the time of continuous operation.
  • stored in the tank will mix in the drained liquid after isolation
  • a typical embodiment of the present invention is an emulsion separator using ultrasonic waves, and has the following configuration.
  • An emulsion decomposing apparatus is an emulsion decomposing apparatus that separates an emulsion containing an oily component and an aqueous component, and an emulsion supply port that supplies the emulsion;
  • the inner wall around the oily liquid discharge port is made of a hydrophobic member, and the ultrasonic vibration part composed of an ultrasonic vibration element and an ultrasonic reflection element arranged so as to face each other across the flow path part It is characterized by performing a separation process by applying a sonic vibration to the emulsion.
  • An emulsion separator is an emulsion separator that separates an emulsion containing an oily component and an aqueous component, and an emulsion supply port that supplies the emulsion;
  • An oily liquid discharge port for discharging the oily component and an aqueous liquid discharge port for discharging the aqueous component; and a flow path part for separating the emulsion, and the outer wall of the flow path part is super
  • An ultrasonic vibration unit that applies ultrasonic vibration is disposed, and the ultrasonic vibration unit applies ultrasonic vibration to the emulsion.
  • FIG. 1 It is a figure which shows the structure of the system containing the emulsion separation apparatus using the ultrasonic wave of Embodiment 1 of this invention. It is a figure which shows the structure of the emulsion process part of the emulsion separation apparatus of Embodiment 1 in a XZ cross section.
  • (A) is a view showing the structure of an emulsion treatment unit of the emulsion separation apparatus of Embodiment 1 in the XZ section
  • (b) to (d) are views in the YZ section.
  • FIG. It is a figure which shows the state of the emulsion process by the emulsion separator of Embodiment 1.
  • FIG. It is a figure which shows the state of the emulsion process by the emulsion separator of Embodiment 1.
  • FIG. It is a figure which shows the structure of the system containing the emulsion separation apparatus using the ultrasonic wave of Embodiment 3 of this invention. It is a figure which shows the structure of the emulsion process part of the emulsion separation apparatus of Embodiment 3 in a XZ cross section. It is a figure which shows the structure of the emulsion process part of the emulsion separation apparatus of Embodiment 3 in a XZ cross section.
  • FIG. 8 shows an XY cross section of the ultrasonic transducer of the emulsion treatment section of FIG. 8
  • (b) shows an XZ cross section near the ultrasonic transducer
  • (c) shows an XY cross section near the oily liquid discharge port. It is a figure shown by.
  • the emulsion separation device of each embodiment has a configuration suitable for use in separating a liquid in which plural kinds of liquids are mixed, such as purified water of an emulsion.
  • a liquid in which plural kinds of liquids are mixed such as purified water of an emulsion.
  • an emulsion treatment or water purification treatment by an emulsion separator an emulsion mixed with oil and water, represented by factory wastewater, etc., an oily liquid containing a large amount of oily components, and other aqueous liquids To separate.
  • the emulsion separation device 10 includes an emulsion processing unit 30 including a flow path unit through which the emulsion flows, and a drive unit 20 that drives the emulsion processing unit 30.
  • an ultrasonic transducer 35 and an ultrasonic reflection plate 36 are provided at one end of the outer wall so as to sandwich the flow path section 34, and a sensor 37 that detects (senses) the flow in the flow path section 34.
  • the sensor 37 that detects the flow may detect the flow direction, flow rate, and pressure in the flow path section 34.
  • the inner wall of the flow path part 34 mentioned above has both a hydrophilic region and a hydrophobic region.
  • the ultrasonic transducer 35 receives an electrical signal from the drive unit 20, generates an ultrasonic wave, and forms a sound field in the flow path unit 34.
  • the droplets in the emulsion existing in the flow path section 34 are captured and separated, and separated into an oily liquid containing a large amount of oily components and other aqueous liquids.
  • the operation method of the emulsion separator is, for example, (1) filling the emulsion separator with droplets to be separated, (2) separating into two or more liquids, and (3) draining the separated liquids, respectively. Batch processing the above processing steps, discharging from the outlet, (4) filling the emulsion separation device with droplets, etc., and (5) further separating the filled droplets into two or more liquids Call it. Further, the process step of filling the droplets and the like of (4) while performing the discharge process of (3) is also included in the continuous operation process, and this process step is called a flow process.
  • the operation processing of the emulsion separator including these batch processing or flow processing is called continuous processing. Moreover, you may have the driving
  • FIG. 1 (Configuration of emulsion separator)
  • the entire system of FIG. 1 is configured to include an emulsion separator 10, an emulsion tank 41, a liquid feed pump 44, an aqueous liquid tank 42, and an oily liquid tank 43.
  • the emulsion separation apparatus 10 includes an emulsion processing unit 30 and a drive unit 20 connected thereto.
  • the emulsion tank 41 is a tank filled with the emulsion 51.
  • the emulsion tank 41 and the liquid feeding pump 44 are connected by a liquid feeding pipe 60, and the liquid feeding pump 44 is connected to the emulsion processing unit 30 via the liquid feeding pipe 61.
  • the emulsion 51 in the emulsion tank 41 is supplied to the emulsion supply port 31 of the emulsion processing unit 30 through the liquid supply pipe 60 and the liquid supply pipe 61 by the liquid supply pump 44.
  • the emulsion 51 supplied to the emulsion processing unit 30 is separated into an oily liquid 53 containing a large amount of oily components and an aqueous liquid 52 other than that, and the aqueous liquid 52 is transferred to the aqueous liquid tank 42 and the oily liquid 53.
  • the emulsion processing unit 30 is driven by a driving unit 20 including a signal detection unit 22 and an output control unit 21.
  • FIG. 2 shows an XZ cross section in the structure of the emulsion processing unit 30 of FIG.
  • the emulsion processing unit 30 includes a tubular structure that is disposed in the longitudinal direction in the horizontal direction that constitutes the flow path unit 34, and an ultrasonic transducer 35 that is provided to face each other across the region of the flow path unit 34. And a sound wave reflection plate 36. Note that “facing” means facing each other and substantially parallel.
  • the flow path section 34 is provided with an emulsion supply port 31, an aqueous liquid (aqueous component) discharge port 32, and an oily liquid (oil component) discharge port 33 as openings.
  • the flow path unit 34 which is a tubular structure, is arranged as shown in the space of (X, Y, Z). That is, the flow path part 34 has a long axis arranged in the X direction and a radius and a short axis arranged in the Z direction and the Y direction.
  • the flow path part 34 which is a tubular structure has at least three or more surfaces.
  • the YZ cross section is circular as shown in the figure, but may have other shapes.
  • the ultrasonic transducer 35 and the ultrasonic reflector 36 are disposed on two surfaces of the channel portion 34 facing in the X direction, and the emulsion supply port 31 is provided on the side of the tubular structure that is the other surface.
  • An aqueous liquid discharge port 32, an oily liquid discharge port 33, and the like are provided.
  • the emulsion supply port 31 is connected to the Z direction downward end of the liquid feeding pipe 61, and the emulsion 51 flows in.
  • the emulsion supply port 31 is provided in an arrangement that opens upward in the Z direction in the vicinity of the right end portion in the X direction of the flow path portion 34 that is a tubular structure.
  • the aqueous liquid discharge port 32 is a first discharge port and is connected to the upward end of the liquid feeding pipe 62 in the Z direction to discharge the aqueous liquid 52.
  • the aqueous liquid discharge port 32 is provided near the left end in the X direction of the flow path portion 34 so as to open downward in the Z direction.
  • the oily liquid discharge port 33 is a second discharge port, and is connected to the end of the liquid supply pipe 63 facing downward in the Z direction, and discharges the oily liquid 53.
  • the discharge port 33 is provided in the vicinity of the left end portion in the X direction of the flow path portion 34 so as to open upward in the Z direction.
  • the flow path section 34 has flows such as f1, f2, and f3 as the flow of the emulsion 51 and the like.
  • the emulsion 51 flows into the flow path part 34 from the emulsion supply port 31 on the right side in the X direction.
  • the inflowing emulsion 51 flows in the flow path part 34 from the upstream in the X direction on the right side to the downstream in the X direction on the downstream side via the X direction that is the long axis.
  • One of the flows of f1 is discharged as an aqueous liquid 52 from the aqueous liquid discharge port 32 below the left end of the X direction as in f2.
  • the other of the flow of f1 is discharged
  • the direction in which the emulsion 51 flows changes from the downward direction in the Z direction to the left direction in the X direction as shown by f1 in the liquid feeding pipe 61 and in the flow path portion 34.
  • the direction in which the aqueous liquid 52 flows changes from the left in the X direction to the downward in the Z direction as indicated by f2 in the flow path section 34 and in the liquid feeding pipe 62.
  • the direction in which the oily liquid 53 flows changes from the left in the X direction to the upward in the Z direction as indicated by f3 in the flow path section 34 and in the liquid feeding pipe 63.
  • oily or aqueous droplets are captured from the flowing emulsion 51 by the action of ultrasonic waves in the flow path section 34 having the long axis in the X direction.
  • the trapped droplets increase or decrease in buoyancy due to aggregation. Therefore, when the droplet is an aqueous component, it settles downward in the Z direction due to its own weight, and when the droplet is an oil component, it floats upward in the Z direction. Thereby, in the flow path part 34, a lot of aqueous components gather in the bottom part below the Z direction, and a lot of oily ingredients gather in the Z direction upper part.
  • the aqueous liquid discharge port 32 in the flow path part 34 is provided at an arbitrary position on the bottom part below the Z direction, and the oily liquid discharge port 33 is provided at an arbitrary position above the Z direction.
  • the aqueous liquid discharge port 32 is provided on the left side in the X direction and below the Z direction.
  • the oily liquid discharge port 33 is provided at a position on the left side in the X direction and above the Z direction.
  • oily components have high wettability with hydrophobic materials
  • aqueous components have high wettability with hydrophilic materials. Therefore, when the inner wall in the flow path part 34 is hydrophobic, the oil component in the emulsion 51 is easily attached, and when it is hydrophilic, the aqueous component is easily attached. Since the aqueous component or oily component adhering and accumulating in the flow path part 34 is mixed into the discharged liquid from the oily liquid discharge port 33 or the aqueous liquid discharge port 32, the purity of the discharged liquid is lowered. Therefore, it is necessary to reduce the deposits in the flow path portion 34.
  • High wettability refers to a state in which a liquid is in contact with a solid surface and a contact angle that is an angle formed by a tangent to the surface of the liquid and the solid surface is 90 degrees or less. High wettability is also called hydrophilic. Further, when the contact angle exceeds 90 degrees, the wettability is said to be low, and it is said to have hydrophobicity.
  • Oily components have high wettability with hydrophobic materials, and aqueous components have high wettability with hydrophilic materials, whereas oily components are difficult to wet with hydrophilic materials, and aqueous components are difficult to wet with hydrophobic materials. That is, the oil component is less likely to adhere to the hydrophilic material, and the aqueous component is less likely to adhere to the hydrophobic material. Therefore, the above-mentioned deposits can be suppressed by patterning the inner wall surface of the flow path portion 34 to be hydrophobic or hydrophilic. The patterning process is performed by plasma processing, UV processing, or the like.
  • the upper part in the Z direction where the oil component increases is made hydrophobic
  • the lower part in the Z direction where the aqueous component increases is made hydrophilic, so that the oily liquid drained above the Z direction is discharged. It is possible to suppress the mixing of the aqueous component into the outlet 33 and to suppress the mixing of the oily component into the aqueous liquid discharge port 32 disposed below the Z direction.
  • the inner wall surface of the flow path 34 it is possible to make the inner wall surface of the flow path 34 more difficult to adhere by changing the area ratio of the hydrophobic material and the hydrophilic material depending on the content ratio of the oily component and the aqueous component of the emulsion 51. That is, when the oily component of the emulsion 51 is large, the deposit can be further suppressed by patterning the large area of the hydrophobic material in the upper part in the Z direction. Moreover, when there are many aqueous components of the emulsion 51, it is good to enlarge the area of the hydrophilic material of the Z direction lower part.
  • the hydrophobic material may be configured to cover the periphery of the oil component discharge port
  • the hydrophilic material may be configured to cover the periphery of the aqueous component discharge port.
  • the periphery refers to the inner wall inner circumference at least about 5 mm below the lower end of the oil component discharge port. Further, when processed with a hydrophobic material so as to exceed about 5 mm, the aqueous component is still difficult to adhere, and the oil component is easily adsorbed. Similarly, the periphery of the aqueous component discharge port side is about 5 mm.
  • FIG. 3A shows an XZ cross section in the structure of the emulsion processing unit 30 shown in FIG. 2, and FIGS. 3B to 3C show YZ cross sections along AA ′ in FIG. 3A.
  • the inner wall at the upper part in the Z direction in which a large amount of oil component is present is subjected to surface treatment in the hydrophobic area, and the inner wall in the lower part in the Z direction in which the aqueous component is increased is subjected to surface treatment.
  • the oily liquid discharge port 33 has openings in the hydrophobic region, and the aqueous liquid discharge port 32 has openings in the hydrophilic region, respectively, in contact with the liquid feeding pipes 61, 62, 63.
  • the emulsion supply port 31 has an opening in the hydrophobic region and is connected to the liquid feeding pipe 61, but may be disposed in the hydrophilic region.
  • the flow path portion 34 may be treated so that only the inner wall surface thereof becomes a hydrophobic region and a hydrophilic region.
  • You may be comprised with the conjugate
  • you may have a structure where a hydrophobic member and a hydrophilic member closely_contact
  • a hydrophobic region and a hydrophobic member are described. These are collectively referred to as a hydrophobic portion.
  • region and a hydrophobic member both process the surface of a material or show the property of material itself, and do not point out only any one. Therefore, the expression “hydrophobic part” is used below. It should be noted that the expression “hydrophilic part” is used for the hydrophilic material and the hydrophilic region as well as the “hydrophobic part”.
  • the recovery efficiency of the liquid droplets containing a large amount of aqueous components is somewhat lowered even if the inner wall portion of the flow path portion 34 is formed of a hydrophobic portion without using a hydrophilic portion, It is effective for collecting drops.
  • the constituent ratio of the hydrophobic part and the hydrophilic part used for the inner wall part of the flow path part 34 is changed according to the ratio of the oily component and the aqueous component of the emulsion.
  • the oily component of the emulsion contains about 70%
  • the inner wall portion of the flow path portion 34 is moved from the position of the oily liquid discharge port 33 to a position of about 30%, that is, the oily liquid discharge port 33 is aqueous.
  • Up to 70% of the inner wall portion toward the liquid discharge port 32 is constituted by a hydrophobic portion, and the inner wall is constituted according to the constituent ratio of the oily component of the emulsion, so that the decomposition efficiency can be increased.
  • the ultrasonic transducer 35 is an element that converts an electric signal into vibration, is connected to the output control unit 21 through a conducting wire (not shown), and is driven by the electric signal E1 from the output control unit 21.
  • the ultrasonic transducer 35 is attached so that the vibration surface s1 is exposed in the flow path section 34, and is substantially parallel to the ultrasonic reflection plate 36 in the YZ plane corresponding to the direction of the short axis of the flow path section 34.
  • FIG. 4 is an explanatory diagram relating to the emulsion processing including the operation principle relating to the ultrasonic waves by the emulsion processing unit 30 in FIGS. 2 and 3.
  • the ultrasonic transducer 35 receives and drives the electric signal E1.
  • the ultrasonic transducer 35 that has received the electric signal E1 converts the electric signal into ultrasonic vibration and generates an ultrasonic wave in the flow path portion 34, thereby forming a strong sound field.
  • the sound field generated by the ultrasonic waves is a standing wave sound field corresponding to a frequency specific to the ultrasonic transducer 35.
  • a droplet sufficiently smaller than the distance between the abdomen 302 and the node 301 is present in the emulsion 51 that is a medium in the flow path portion 34, The droplet receives a force directed toward the antinode 302 or the node 301 of the sound field according to the physical property value, and is thereby captured at the position of the antinode 302 or the node 301.
  • the captured droplets aggregate due to intermolecular force.
  • the capturing position is included in the entire X direction in which the sound field in the flow path portion 34 is formed.
  • the emulsion 51 can be efficiently decomposed into an oily liquid containing a large amount of oily components and other aqueous liquids, and the decomposition performance can be improved.
  • the ultrasonic wave When the emulsion 51 is separated in the flow path section 34, the ultrasonic wave may be disturbed by a solid matter contained in the emulsion, and a sudden acoustic flow may be generated.
  • the acoustic flow is the same as the direction in which ultrasonic waves propagate, and has a flow in the right direction in the X direction.
  • the force for capturing the droplets is weakened, so the captured droplets are released and flowed into the acoustic stream. Since the generation of the acoustic flow lowers the emulsion separation performance, when the emulsion is continuously processed using the apparatus, the generation of the acoustic flow in the flow path section 34 is detected and the flow is controlled.
  • the generation of the acoustic flow detects, for example, the generation of vibrations different from the ultrasonic waves by the ultrasonic vibration unit or the generation of a flow different from the average flow velocity of the emulsion.
  • the average flow velocity passing through the cross section is sampled, and a case where the average flow velocity changes from the previous value is detected.
  • This change can be detected by any method as long as it can be detected that there is a change in the average flow velocity. For example, as an example of a change detection method, when a flow rate that is twice or more instantaneously detected relative to the average flow rate of the emulsion flowing in the flow path, a different flow or vibration is detected. It can be said.
  • a moving average value of the flow rate of the emulsion flowing through the flow path is calculated, and a normal state is measured.
  • the occurrence of a different flow or vibration was detected when the flow velocity increased and the moving average value was about 10% to 20% higher than in the normal state.
  • the above-described acoustic flow detection / control system will be described with reference to FIGS.
  • the acoustic flow generated in the flow path portion stops once the ultrasonic vibration of the ultrasonic transducer 34 is stopped.
  • the sensor 37 that detects the direction of the flow disposed in the flow path part 34 illustrated in FIG. 2 detects the flow when an acoustic flow is generated in the flow path part 34, and sends the electric signal E ⁇ b> 2 to the signal detection part.
  • Call 22 Upon receiving the electric signal E2, the signal detection unit 22 transmits an electric signal E3 for stopping the electric signal E1 to the output control unit 21.
  • the output control unit 21 Upon receiving the electrical signal E3, the output control unit 21 stops the electrical signal E1 and stops the ultrasonic vibration of the ultrasonic transducer 35. After stopping the electrical signal E1, the output control unit 21 transmits the electrical signal E1 again to drive the ultrasonic transducer 35.
  • the ultrasonic vibrator stop time may be appropriately changed according to the flow rate and pressure, the cross-sectional area of the flow path portion 34, and the viscosity and weight of the emulsion to be decomposed. It is desirable to stop for at least about 1 second.
  • the emulsion 51 supplied from the emulsion supply port 31 into the flow path portion 34 is changed into an oily liquid 53 containing a large amount of oily components and an aqueous liquid 52 other than that.
  • the oily liquid 53 containing a large amount of oily components can be selectively and efficiently recovered and discharged from the oily liquid discharge port 33, and other aqueous liquids 52 can be selectively and efficiently recovered from the aqueous liquid discharge port 32. And can discharge.
  • the second embodiment in addition to the effects of the first embodiment, even if a sudden acoustic flow occurs, the generation of the ultrasonic wave is stopped, thereby disturbing the sound field due to the generated acoustic flow. By reducing it, it becomes possible to further improve the decomposition performance.
  • FIG. 5 is used to explain the results of experiments on the processing performance in the emulsion processing using the emulsion separator 10 of the second embodiment.
  • FIG. 5 shows the result of the emulsion treatment by the suspension treatment apparatus 10 of the first embodiment.
  • the sample solution of emulsion 51 used in this evaluation was prepared by mixing waste oil solution (black brown) at a concentration of 30 ppm with tap water (colorless and transparent) and stirring for 30 seconds with a disperser. Moreover, the ultrasonic transducer
  • FIG. 5 (a) shows a state in the flow path (inner diameter: 20 mm, length: 150 mm) before ultrasonic irradiation.
  • FIG. 5B shows a state in the flow channel portion after irradiation with ultrasonic waves for 30 seconds.
  • FIG. 5A it can be seen that the sample liquid is uniformly milky brown, and the waste oil liquid droplets are uniformly distributed throughout the sample liquid.
  • an ultrasonic transducer 35 is arranged on the left side of the image, and an ultrasonic reflector 36 is arranged on the right side.
  • the oily liquid discharge port 33 is disposed on the upper left end in the image, the aqueous liquid discharge port 32 is disposed on the lower left end in the image, and the emulsion supply port 31 is disposed on the upper right outside the image.
  • the distance between the antinodes and the nodes of the ultrasonic wave is about 0.3 mm, and there is a YZ plane in the waste liquid droplets in the sample liquid in the liquid in the X direction in the flow path section. To do.
  • FIG. 6 shows a state in which an acoustic stream is generated during ultrasonic irradiation.
  • FIG. 6A shows a state in the flow channel portion immediately before the acoustic flow is generated
  • FIG. 6B shows an enlarged view of a region surrounded by a dotted line in the flow channel portion 34 shown in FIG. 6 (c) to 6 (f) show how the acoustic flow is observed at regular intervals
  • FIG. 6 (g) shows that the ultrasonic wave is stopped after FIG. 6 (f).
  • Each of the states in the flow path section 34 is shown.
  • the captured droplets are released, and the droplets do not aggregate, so that the emulsion separation performance of the emulsion separation device 10 is deteriorated.
  • the generated acoustic flow can be stopped by stopping the ultrasonic wave, it is effective to dispose the sensor 37 for detecting the flow in the flow path portion 34 to detect the generation of the acoustic flow.
  • the ultrasonic oscillation is stopped as described in the second embodiment, and the ultrasonic oscillation is resumed when the flow of the sample liquid in the flow path portion 34 is stabilized.
  • the emulsion separation performance of the emulsion separator can be improved.
  • FIG. 7 shows the configuration of a system including the emulsion separator 10a of the third embodiment. Since the configuration is substantially the same except for the emulsion processing unit 30a, differences will be described.
  • FIG. 8 shows an XZ cross section of the structure and flow of the emulsion processing unit 30a in the emulsion separation apparatus 10a of the third embodiment. A sensor 37 for detecting the flow may be provided and will be described later.
  • the emulsion processing unit 30a has a flow path part 34a, and the flow path part 34 having a tube state structure has a major axis arranged in the Z direction and a radius and a minor axis arranged in the X direction and the Y direction. This is different from the first and second embodiments.
  • the emulsion supply port 31 is disposed in the vertical direction (X direction) of the flow path portion 34 and is provided at an intermediate position in the Z direction on the side surface of the long axis (longitudinal) so as to open rightward in the X direction. It is connected to the end of the liquid pipe 61 facing left in the X direction.
  • the aqueous liquid discharge port 32 is provided at the position of the lower end in the Z direction on the side surface of the flow path portion 34 so as to open to the left in the X direction, and is connected to the right end of the liquid feeding pipe 62 in the X direction.
  • the oily liquid discharge port 33 is provided at an upper end position in the Z direction of the flow path portion 34 so as to open upward in the Z direction, and is connected to the lower end portion of the liquid feeding pipe 63 in the Z direction.
  • the ultrasonic transducer 35 and the ultrasonic reflection plate 36 are opposed substantially parallel to both the upper and lower ends in the Z direction across the almost entire region of the flow path section 34 in the Z direction, which is the long axis of the flow path section 34.
  • the flow path section 34 has a flow such as f1, f2, and f3 as the flow of the emulsion 51 and the like.
  • the emulsion 51 that has flowed into the flow path portion 34 from the emulsion supply port 31 flows in the flow path portion 34 in the upper and lower directions f1 and f2 in the Z direction as indicated by f1.
  • the flowing direction of the emulsion 51 changes from the left in the X direction to the up and down direction in the Z direction as shown by f1 in the liquid feeding pipe 61 and in the flow path part 34a.
  • the flow direction of the aqueous liquid 52 changes from the downward direction in the Z direction to the left direction in the X direction as indicated by f2 in the flow path part 34a and in the liquid feeding pipe 62.
  • the direction in which the oily liquid 53 flows is the same in the upward direction in the Z direction as indicated by f3 in the flow path section 34 and in the liquid feeding pipe 63.
  • droplets are captured from the flowing emulsion 51 by the action of ultrasonic waves in the flow path portion 34 having a long axis in the Z direction.
  • the flow-path part 34a many oil-based components gather in the Z direction upper part, and many aqueous components gather in the bottom part below Z direction.
  • the oily liquid discharge port 33 is provided at the upper end in the Z direction of the flow path portion 34a, and the aqueous liquid discharge port 32 is provided at a position near the bottom portion below the Z direction.
  • the oily component of the emulsion 51 to be decomposed rises by buoyancy. Therefore, the oil component floats upward in the Z direction.
  • the oily component that has floated up is captured at the positions of the abdomen 302 and the node 301 (not shown) at the top in the X direction. Therefore, it will be further decomposed by being captured at the surface where it has surfaced.
  • the decomposed aqueous component is trapped in the abdomen 302 and the node 301 at the point of sedimentation. Thereafter, the decomposed oily component floats and the aqueous component settles. They are captured and decomposed again at the point where they float or sink. Therefore, the decomposition performance is further improved as compared with the first and second embodiments.
  • the configurations of the ultrasonic transducer 35 and the ultrasonic reflector 36 may be interchanged. If the ultrasonic transducer 35 is arranged in the upper part in the Z direction, that is, in a direction in which a large amount of oily components are collected, stronger ultrasonic waves can be irradiated. Therefore, when it is desired to improve the decomposition performance of the oil component, the configuration shown in FIG. On the contrary, when it is desired to improve the decomposition performance of the aqueous component, the ultrasonic transducer 35 may be disposed in the lower part in the Z direction, that is, in a direction in which a large amount of the aqueous component is collected.
  • FIG. 9 shows an XZ sectional view of the emulsion treatment unit 30a shown in FIG.
  • the inner wall at the upper part in the Z direction in which a large amount of oil component is present in the separation process is applied to the hydrophobic region, and the inner wall at the lower part in the Z direction in which the aqueous component is increased is processed to the hydrophilic region.
  • the aqueous liquid discharge port 32 is opened in the hydrophilic area.
  • FIGS. 10 (a) and 10 (c) show an XY cross-sectional view of BB ′ of the emulsion processing unit 30a shown in FIG. 9, and FIGS. 10 (b) and 10 (d) show an XY cross-sectional view of CC ′.
  • the flow path portion 34a is treated as shown in FIGS. 10 (c) and 10 (d) even if only the inner wall surface is treated as a hydrophobic region or a hydrophilic region.
  • the structure may be such that the hydrophobic member and the hydrophilic member are in close contact with the inside of the tubular structure which is the flow path portion 34a.
  • the separation performance can be improved by reducing the adhesion of the deposit by appropriately changing the ratio of the hydrophobic member and the hydrophilic member in accordance with the ratio of the oily component and the aqueous component of the emulsion 51. .
  • FIG. 11A shows an XY cross-sectional view of the ultrasonic transducer 35 of the emulsion processing unit 30 shown in FIG.
  • the oily liquid discharge port 33 is disposed at the same position as the ultrasonic transducer 35 disposed on the XY plane at the upper end in the Z direction of the flow path portion 34a which is a tubular structure.
  • vibrator 35 has the opening part 70, as shown to Fig.11 (a).
  • the opening 70 is also provided corresponding to the oily liquid discharge port 33, and the opening 70 communicates the flow path portion 34 a and the liquid feeding pipe 63 in the Z direction.
  • FIG. 11B shows an XZ cross-sectional view in the vicinity of the ultrasonic transducer 35 of the emulsion processing unit 30a shown in FIG. 8, and FIG. 11C shows an XY cross-sectional view.
  • the outer peripheral portion of the vibration surface s1 of the ultrasonic transducer 35 is fixed to the side surface of the flow channel portion 34a that is a tubular structure on the upper surface in the Z direction of the flow channel portion 34a. Further, the vibration surface s1 of the ultrasonic transducer 35 is disposed so as to be exposed, and the oily liquid discharge port 33 is disposed on the ultrasonic transducer 35.
  • the emulsion processing unit 30a in the third embodiment also has a sensor 37 for detecting the flow in the flow path portion 34a, as in the second embodiment, will be described (FIG. 8).
  • the sensor 37 that detects the flow and the drive unit 20 detect an acoustic flow that reduces the separation performance of the emulsion, and control the flow.
  • the separation performance of Embodiment 3 can be further improved.
  • the decomposition performance of the suspension treatment can be improved.
  • efficient disassembly is possible, it is possible to contribute to reducing power consumption during driving.
  • the present embodiment is applicable not only to water purification applications such as emulsion separation.

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Abstract

　La présente invention vise à fournir un dispositif de séparation d'émulsion dans laquelle des ondes ultrasonores sont utilisées, le but étant de fournir une technique grâce à laquelle il est possible d'atténuer une réduction de l'efficacité de séparation. Selon un mode de réalisation, à cet effet la présente invention concerne un dispositif de séparation d'émulsion qui sépare une émulsion contenant un constituant à base d'huile et un constituant à base d'eau, le dispositif de séparation étant caractérisé en ce que: le dispositif de séparation d'émulsion comporte un chemin d'écoulement pour la séparation d'une émulsion, le chemin d'écoulement présentant une ouverture d'alimentation en émulsion pour fournir une émulsion, une ouverture de décharge d'un fluide à base d'huile pour l'évacuation d'un constituant à base d'huile, et une ouverture de décharge de fluide à base d'eau pour l'évacuation d'un constituant à base d'eau; une partie d'une paroi interne du chemin d'écoulement en contact avec l'émulsion, la partie étant à proximité de l'ouverture de décharge de fluide à base d'huile, est configurée de manière à être hydrophobe; et une unité d'oscillation d'ondes ultrasonores configurée à partir d'un élément d'oscillation d'ondes ultrasonores et un élément de réflexion d'ondes ultrasonores disposés en face l'un de l'autre à travers le chemin d'écoulement effectue un procédé pour séparer l'émulsion par application d'une onde ultrasonore à l'émulsion.
PCT/JP2014/061649 2014-04-25 2014-04-25 Dispositif de separation d'emulsion WO2015162773A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013523449A (ja) * 2010-04-12 2013-06-17 フローデザイン ソニックス， インコーポレイテッド 水を生成するための用途の水油分離のための超音波および音響泳動技術
WO2014050320A1 (fr) * 2012-09-26 2014-04-03 株式会社日立製作所 Dispositif de traitement d'une suspension à l'aide d'ondes ultrasoniques

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013523449A (ja) * 2010-04-12 2013-06-17 フローデザイン ソニックス， インコーポレイテッド 水を生成するための用途の水油分離のための超音波および音響泳動技術
WO2014050320A1 (fr) * 2012-09-26 2014-04-03 株式会社日立製作所 Dispositif de traitement d'une suspension à l'aide d'ondes ultrasoniques

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