WO2013146624A1 - 液体噴射装置及び液体噴射方法 - Google Patents
液体噴射装置及び液体噴射方法 Download PDFInfo
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- WO2013146624A1 WO2013146624A1 PCT/JP2013/058449 JP2013058449W WO2013146624A1 WO 2013146624 A1 WO2013146624 A1 WO 2013146624A1 JP 2013058449 W JP2013058449 W JP 2013058449W WO 2013146624 A1 WO2013146624 A1 WO 2013146624A1
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- liquid
- gas
- ejecting apparatus
- liquid ejecting
- nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0861—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with one single jet constituted by a liquid or a mixture containing a liquid and several gas jets
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- 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
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
- B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/044—Slits, i.e. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
- B05B7/067—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet the liquid outlet being annular
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
- B05B7/068—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet the annular gas outlet being supplied by a gas conduit having an axially concave curved internal surface just upstream said outlet
Definitions
- the present invention relates to a liquid ejecting apparatus that ejects liquid in the form of fine particles and a liquid ejecting method that ejects liquid in the form of fine particles.
- ⁇ Nozzles that make liquid fine particles are used in various applications.
- a spray drying method in which an ultrafine particle suspension to which a solution containing solids, water, additives, and the like are added is sprayed in hot air using a nozzle and dried and solidified instantaneously.
- the applicant of the present application has developed a nozzle 80 for injecting a liquid into fine particles in view of the above situation (Patent Document 1).
- the nozzle 80 supplies liquid from the supply port 85 to the inclined surface 87.
- the liquid supplied to the inclined surface 87 is thinly stretched by an air flow that flows at high speed along the inclined surface 87 to become a thin film flow 88.
- the thin film flow 88 is accelerated by the air flow and is jetted into the gas from the tip of the inclined surface 87 to become droplets 89 of fine particles.
- this nozzle 80 the liquid can be ejected to extremely small particles.
- the supplied liquid is pressed against the smooth surface with a high-speed flowing air flow and thinly stretched to form a thin film flow.
- the inclined surface is worn.
- the inclined surface is lost, and eventually spraying cannot be performed.
- the liquid supplied from the liquid channel is thinly stretched along a smooth inclined surface to form a thin film flow, and then sprayed from the tip of the smooth inclined surface.
- the liquid in a very thin thin film flow locally dries and solidifies on a smooth inclined surface, which gradually accumulates and clogs.
- the thinner the slit width of the liquid injection port the easier it becomes to clog.
- annular nozzle that jets a liquid as a thin film flow on a slope with a pressurized gas has a problem in that it is difficult to downsize and it is difficult to manufacture.
- a main object of the present invention is to provide a liquid ejecting apparatus and a liquid ejecting method in which clogging is suppressed and the particle diameter of the obtained fine particles is made uniform.
- the liquid ejecting apparatus ejects the liquid by atomizing it with a pressurized gas, and pressurizes the liquid inside.
- a gas channel for supplying a gas a main body provided with a liquid channel for supplying a liquid, a nozzle part having a liquid injection port for injecting a liquid in the shape of a slit in the main body, and
- the nozzle portion includes a nozzle inclined surface on a side surface centered on the liquid injection port, and for injecting pressurized gas between the nozzle inclined surface and the main body portion.
- a gas injection port is defined, the liquid injection port is in communication with the liquid flow channel, the gas injection port is in communication with the gas flow channel, and the nozzle inclined surface is in a cross-sectional view. It is formed to intersect on the extension line of the liquid jet, The serial pressurized gas, injected by being inclined along the nozzle inclined surface, crossed so as to sandwich the liquid, by crushing the liquid can be ejected by atomization with.
- the nozzle inclined surface is configured by the first nozzle inclined surface and the second nozzle inclined surface around the liquid injection port, and the gas flow path is A first gas flow channel communicated with the first gas injection port facing the first nozzle inclined surface, and a second gas flow channel communicated with the second gas injection port facing the second nozzle inclined surface; , Can be configured.
- the liquid can be atomized by supplying the liquid and the pressurized gas through the first gas channel, the second gas channel, and the liquid channel, and only one liquid channel is required.
- the configuration can be simplified and the cost can be reduced as compared with a conventional injection device using two or more liquids such as a four-fluid nozzle.
- the liquid ejecting port is formed so that the fine particles ejected from the liquid ejecting port travel in a direction perpendicular to the extending direction of the main body. it can.
- the above configuration provides an advantage that the design for installing the liquid ejecting apparatus can be easily performed.
- the inclination angle of the nozzle inclined surface can be formed to 20 ° to 70 °.
- the main body can be configured in a cylindrical shape, and the liquid ejecting port can be opened in a circumferential shape to discharge the fine particles in a ring shape.
- the first gas flow path is extended inside the main body, and after passing through a region corresponding to the liquid ejecting port, is folded back.
- the first gas injection port can be communicated.
- the first gas flow path extends along the central axis in the main body portion beyond the region corresponding to the liquid ejecting port.
- a buffer chamber that communicates with a passage and an opening that is opened in a region that exceeds the region corresponding to the liquid ejection port, and is supplied to the main flow path and enters the buffer chamber through the opening.
- the delivered first gas can be configured to be rectified in the buffer chamber.
- the first gas flow bent through the opening can be rectified in the buffer chamber and then sent to the first gas injection port, so that the balance between the first gas flow and the second gas flow is maintained. Easy to do.
- the liquid ejecting port is opened in a linear slit, and the liquid ejecting direction is parallel to the extending direction of the liquid flow path extending into the main body. It can be formed so that the fine particles ejected from the mouth progress.
- the particles can be crushed and formed into fine particles by the pressurized gas intersecting at the nozzle inclined surface while being discharged in a film form from the liquid injection port, and the fine particles can be discharged in a film form.
- the liquid channel is branched into a plurality of sub liquid channels, and the liquid supplied from each sub liquid channel is supplied to the liquid ejecting port. Can be integrated in the previous stage.
- the slit width d 3 of the liquid ejecting port is set to be greater than the slit width d 1 of the first gas ejecting port or the slit width d 2 of the second gas ejecting port. Can also be widened.
- the liquid ejecting method is a liquid ejecting method in which the liquid is atomized with a pressurized gas and ejected, and the liquid is supplied through the liquid flow path.
- the pressurized gas includes a first gas and a second gas; Supply through the first gas flow path extended in parallel with the liquid flow path, supply the second gas through the second gas flow path extended in parallel with the liquid flow path, and center the plane of the liquid injection port
- the first gas injection port is arranged on the left and right, and the edge of the first gas flow path is defined in a plane, and the edge of the second gas flow path is defined in a plane.
- the liquid ejecting port 12 can be opened circumferentially to discharge the fine particles in a ring shape. Therefore, since the fine particles can be discharged to the surroundings, a liquid ejecting apparatus capable of efficiently dispersing the fine particles can be realized.
- the first gas flow path 4 is extended in parallel with the liquid flow path 2 and is turned after passing through a region corresponding to the liquid ejection port 12. And communicated with the first gas injection port 14. This reduces the pressure loss from the first gas flow path to the first gas injection port side and is introduced into the gas injection port, so that the injection is performed at substantially the same pressure as the second gas flow channel. Is possible.
- the liquid ejecting port 12 is opened in a linear slit, and ejected from the liquid ejecting port 12 in a direction parallel to the extending direction of the extended liquid channel 2.
- the fine particles can be formed so as to progress.
- the particles can be crushed and formed into fine particles by the pressurized gas intersecting at the inclined surface of the nozzle while being discharged in a film form from the liquid injection port, and the fine particles can be discharged in a film form.
- FIG. 3 is a plan view illustrating the liquid ejecting apparatus according to the first embodiment.
- FIG. 2 is a vertical sectional view of the liquid ejecting apparatus in FIG. 1.
- FIG. 3 is an enlarged cross-sectional view showing the vicinity of a nozzle portion of the liquid ejecting apparatus of FIG. 2.
- FIG. 4 is a further enlarged cross-sectional view in the vicinity of the nozzle portion of FIG. 3. It is the schematic cross section which expanded FIG. 4 further. It is sectional drawing which shows the liquid ejecting apparatus which concerns on a modification.
- FIG. 7A is a cross-sectional view illustrating the liquid ejecting apparatus according to the second embodiment, and
- FIG. 7B is a side view.
- FIG. 7 It is the further expanded sectional view of the nozzle part vicinity of Fig.7 (a). It is the top view and side view which show the nozzle of the 4-fluid type liquid ejecting apparatus which concerns on a comparative example.
- 6 is a graph showing a particle size distribution obtained by the liquid ejecting apparatus of Example 2. It is a graph which shows the particle size distribution obtained with the liquid ejecting apparatus of the comparative example.
- 12A is a cross-sectional view illustrating the liquid ejecting apparatus according to the third embodiment
- FIG. 12B is a side view
- FIG. 12C is an enlarged cross-sectional view of a main part of FIG. FIG.
- FIG. 13A is a cross-sectional view illustrating a liquid ejecting apparatus according to a fourth embodiment
- FIG. 13B is an enlarged cross-sectional view of a main part. It is sectional drawing which shows the nozzle of the conventional liquid ejecting apparatus.
- each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
- the contents described in some examples and embodiments may be used in other examples and embodiments.
- FIG. 1 is a plan view showing a liquid ejecting apparatus 100 according to the first embodiment
- FIG. 2 is a vertical sectional view of the liquid ejecting apparatus 100 in FIG. 1
- FIG. 3 is a nozzle of the liquid ejecting apparatus 100 in FIG. The expanded sectional view which shows the part 10 vicinity is shown, respectively.
- the outer appearance of the main body 1 is formed in a cylindrical bar shape, and a nozzle portion 10 is provided in a constricted portion near the tip.
- the nozzle portion 10 is opened in a slit shape on the circumference, and discharges fine particles of liquid that are refined in an annular shape.
- two liquid supply ports 6 that supply liquid and two gas supply ports that supply gas are provided on the rear end side of the main body 1, two liquid supply ports 6 that supply liquid and two gas supply ports that supply gas are provided.
- a gas supply port consists of the 1st gas supply port 7 and the 2nd gas supply port 8, and the pressurized 1st gas and 2nd gas are supplied to each.
- Each pressurized gas is individually connected to a compressor and its flow rate is independently controlled.
- the same kind of pressurized gas is used for the first gas and the second gas.
- compressed air can be suitably used.
- other types of gases such as an inert gas can be used as appropriate instead of air.
- pressurized gases are supplied from a common gas source, they can be branched in the middle, and the flow rate, that is, the pressure can be adjusted to the branched first gas channel 4 and the second gas channel 5, respectively.
- a special mechanism is provided to adjust the balance between the shape of spray and the state of generation of fine particles.
- gas and liquid supply ports 6 are provided so as to protrude perpendicular to the extending direction of the main body 1.
- Each supply port is connected to a gas compressor P and a fluid pump F by connecting a pipe in an air-tight and liquid-tight manner.
- the second gas supply port 8, the liquid supply port 6, and the first gas supply port 7 are arranged in this order from the left.
- the main body 1 and the nozzle 10 are made of metal such as stainless steel. However, other materials such as ceramics may be used. (Main unit 1)
- a gas flow path 3 for supplying pressurized gas and a liquid flow path 2 for supplying liquid are provided inside the main body 1.
- the liquid channel 2 communicates with the liquid supply port 6.
- the gas flow path 3 includes a first gas flow path 4 and a second gas flow path 5, and communicates with the first gas supply port 7 and the second gas supply port 8, respectively.
- the first gas channel 4, the second gas channel 5, and the liquid channel 2 are extended into the main body 1 in a posture parallel to each other.
- each flow path is arranged concentrically with the central axis in the longitudinal direction of the main body 1, the first gas flow path 4 at the center, the liquid flow path 2 at the outside, and the outside thereof.
- the 2nd gas flow path 5 is arrange
- the tip of the liquid flow path 2 is bent about 90 ° in the middle of the main body 1 and communicates with the liquid injection port 12. Further, as shown in FIG. 3, the first gas flow path 4 extends the main flow path 4 a extended along the central axis of the main body 1 through the region 4 b provided with the liquid injection port 12. . Furthermore, the opening part 4c opened radially from the side surface of the site
- the first gas flow path 4 forms a U-shaped path that allows the first gas to flow into the buffer chamber 9 from the main flow path 4a through the opening 4c and then be folded back in the opposite direction. Further, the first gas flow path 4 extends through the buffer chamber 9 to the side surface (left side in FIG. 3) of the liquid injection port 12, and then opens along the nozzle inclined surface described later. Communicated.
- the second gas flow path 5 is communicated with the second gas injection port 15 opened along the inclined surface of the nozzle before the liquid injection port 12.
- the first gas and the second gas can be stably supplied to both sides of the liquid ejection port 12 in a pressurized state.
- the first gas flow path 4 is not injected immediately after being bent, but once the first gas flow is folded after passing through the region 4b, it is rectified and made uniform in the buffer chamber 9. Thereafter, the first gas flow coming out of the buffer chamber 9 is jetted by increasing the flow velocity at the slit of the first gas jetting port 14 through a straight section.
- the buffer chamber 9 has a volume larger than the diameter of the opening 4c so that the first gas flow bent from the main flow path 4a can be rectified.
- two openings 4c are provided in the axial direction of the main flow path 4a, and the first gas injection is performed after the buffer chamber 9 communicated with the two openings 4c is sufficiently enlarged and rectified. It is sent out to the flow path toward the mouth 14.
- the spray pattern can be changed by adjusting the balance of the flow rate. That is, the spray pattern of the liquid fine particles ejected from the nozzle is changed from the pattern ejected in a fan shape around the plane orthogonal to the central axis of the main body 1, and the central plane of the spray pattern is set to the central axis of the main body 1. It can be adjusted to tilt. (Nozzle part 10)
- the nozzle portion 10 has a slit-like liquid injection port 12 at the center, and nozzle inclined surfaces are provided on both side surfaces thereof.
- the slit shape means a state where the edge is defined in a planar shape.
- Each nozzle inclined surface is a smooth surface.
- a first gas injection port 14 and a second gas injection port 15 are provided along the nozzle inclined surface.
- the nozzle portion 10 is provided in a constricted valley bottom portion formed in the middle of the main body portion 1.
- the main body inclined surfaces of the main body portion 1 that are inclined in a divergent shape are provided on both sides of the nozzle portion 10.
- the gas injection port 13 which injects gas is demarcated by providing a clearance gap between a nozzle inclined surface without making the edge of a main body inclined part contact
- FIG. 4 is a further enlarged cross-sectional view of the vicinity of the nozzle portion 10 of FIG.
- the left side of the nozzle portion 10 is a first nozzle inclined surface 16 and the right side is a second nozzle inclined surface 17.
- the edge of the 1st main body inclined surface 21 of the main-body part 1 is made to adjoin to a 1st nozzle inclined part, the 1st gas injection port 14 is demarcated, while the edge of the 2nd main body inclined surface 22 is inclined 2nd nozzle
- the second gas injection port 15 is defined in the vicinity of the portion.
- the first gas is supplied from the first gas path, and the first gas is supplied from the slit-shaped first gas injection port 14 as the first high-speed gas flow, while the second gas is supplied from the second gas path,
- the second gas is supplied from the second gas injection port 15 as a second high-speed gas flow, and at the same time, the second gas is caused to collide with the layered liquid injected from the slit-like liquid injection port 12 so as to intersect from an oblique direction.
- the 1st gas injection port 14 and the 2nd gas injection port 15 are made into slit shape narrower than the 1st gas flow path 4 and the 2nd gas flow path 5, respectively, and improve the flow velocity of 1st gas and 2nd gas.
- a high-speed fluid formed in layers is used.
- the laminar liquid film flow is efficiently crushed and fine Fine particles can be obtained.
- both surfaces of the liquid flow path 2 are defined in a planar shape, the thickness of the liquid film flow is regulated by this width, and the film thickness is prevented from becoming non-uniform, and thus obtained. Since the particle diameters of the fine particles can be made uniform, high quality injection can be obtained. Furthermore, since the gas flow is given from both sides of the liquid film flow, the liquid film flow can be reliably crushed and extremely fine particles can be obtained.
- liquid and pressurized gas are supplied through three of the first gas channel 4, the second gas channel 5 and the liquid channel 2 to enable fine particles, and in particular, one liquid channel 2 is provided. Therefore, the configuration can be simplified as compared with a jetting apparatus using two or more liquids, such as a conventional four-fluid nozzle.
- a jetting apparatus using two or more liquids, such as a conventional four-fluid nozzle.
- the slit width of the liquid ejection port 12 larger than that of the gas ejection port 13
- the liquid supply amount can be increased, and the generation amount of liquid fine particles per unit time can also be increased.
- the nozzle according to the present embodiment as shown in FIG. 5, by supplying the liquid from the center of the wide nozzle instead of the slope side, the thin film flow is not made more than necessary. This can reduce the risk of clogging. As a result, the stability and reliability of nozzle injection is improved, the frequency of nozzle cleaning work for preventing clogging can be reduced, and the advantage of simplifying maintenance work can be obtained.
- Slit width d 3 of the liquid injection port 12 is wider than the slit width d 2 of the slit width d 1 and second gas injection openings 15 of the first gas injection openings 14.
- d 3 ⁇ 1.5d 1 and d 3 ⁇ 1.5d 2 and more preferably d 3 ⁇ d 1 + d 2 .
- D 1 and d 2 are preferably equal, but d 2 ⁇ d 1 may be satisfied.
- the slit width of the liquid injection port 12 is set to 0.3 mm to 1.3 mm, for example.
- the first nozzle inclined surface 16 and the second nozzle inclined surface 17 are preferably substantially symmetrical with respect to the liquid injection port 12.
- the inclination angle of each nozzle inclined surface is 20 ° to 70 °. This eliminates the need for sharply processing the tip of the nozzle portion 10 and provides an advantage of easy manufacturing. Moreover, you may chamfer the edge of a nozzle inclined surface. According to a test conducted by the present inventors, it was confirmed by an experiment that no change was observed in the obtained particle diameter even if the tip of the supply port of the liquid flow channel 2 was not sharp. Furthermore, the strength can be improved by increasing the tip angle of the smooth nozzle inclined surface.
- the edge tip can be protected during insertion into the main body 1 and maintenance.
- the first nozzle inclined surface and the second nozzle inclined surface are bilaterally symmetric.
- the present invention is not limited to this configuration, and may be an asymmetric shape.
- the inclination angle ⁇ 1 of the first nozzle inclined surface is larger than the inclination angle ⁇ 2 of the second nozzle inclined surface.
- a hollow cone spray type annular nozzle that has a liquid flow path bent in the vicinity of the nozzle portion and discharges in a ring shape from a cylindrical side surface has been described.
- the present invention is not limited to this embodiment, and can also be applied to a straight type liquid ejecting apparatus in which the liquid flow path is parallel to the extending direction of the main body portion and connected to the nozzle portion.
- Such an example will be described as the liquid ejecting apparatus 200 according to the second embodiment with reference to FIGS.
- the outer shape of the main body 1B is formed in a block shape, and a nozzle portion 10B is provided on the upper surface thereof. Also, as shown in the cross-sectional view of FIG.
- a liquid flow path 2B for supplying a liquid, a first gas flow path 4 for supplying a first gas, and a second gas are supplied to the inside.
- the second gas flow path 5 for each is arranged. These are connected to each gas and liquid supply source through a compressor and the like.
- the nozzle portion 10B opens in a slit shape narrower than the inner diameter of the liquid flow path 2B around the liquid injection port 12B communicated with the liquid flow path 2B. While improving, it forms in a liquid film flow. Further, on the left and right of the liquid injection port 12 ⁇ / b> B, a first gas injection port 14 that communicates with the first gas flow path 4 and a second gas injection port 15 that communicates with the second gas flow path 5 are provided. .
- the nozzle inclined surface is provided in the nozzle portion 10B on the left and right of the liquid injection port 12B, the first gas injection port 14 is formed by the first nozzle inclined surface 16, and the second nozzle inclined surface 17 Thus, the second gas injection port 15 is defined.
- the nozzle portion 10B also has a first high-speed gas flow injected from the first gas injection port 14 and a second high-speed gas flow injected from the second gas injection port 15 to be injected from the liquid injection port 12B. This is made fine by crossing at the exit area of the membrane flow. As a result, as shown in the side view of FIG. 7B, the fine particles are formed in a film shape, and it is possible to obtain fine particles having a uniform particle size distribution and a uniform particle size distribution.
- a nozzle of a four-fluid type liquid ejecting apparatus 700 having two liquid flow paths 2C as shown in FIG. 9A was made as a prototype, and the particle size distribution was measured.
- the liquid ejecting apparatus 700 the liquid is stretched into a thin film flow on the inclined surface of the nozzle tip and ejected.
- FIG. 9B it was confirmed that the particle size was increased at the edge of the film-like liquid layer, and the particle size distribution was not uniform. This is because the film thickness non-uniformity occurs at the stage where the liquid thin film flow is stretched on the inclined surface, and the film thickness is increased particularly at the end of the liquid film flow. Is done.
- the step of extending the liquid into the liquid film flow on the inclined surface is eliminated, and the liquid is quickly crushed after being jetted, thereby realizing efficient and fine particle formation. did it.
- the three-fluid type straight type liquid ejecting apparatus can obtain fine particles having a uniform particle size while being downsized.
- an annular or hollow cone type liquid ejecting apparatus as in the first embodiment, it is difficult to manufacture an inclined surface of a nozzle that generates a liquid film flow in an annular shape when trying to reduce the size.
- it is difficult for the straight type to make the liquid film flow uniform in thickness, particularly at the edges, resulting in an increase in the number of coarse particles. It was.
- the particle size distribution is uniform even though it is a straight type. An excellent advantage that high-quality fine particles can be realized is obtained.
- Example 2 had finer particles with a narrower particle size distribution and in other words, a uniform particle size.
- one liquid flow path is used.
- two or more kinds of liquids may be mixed and supplied.
- the liquid flow path is integrated into one in the preceding stage of the nozzle from which the liquid fine particles are finally ejected, and in this sense, is the same as the three-fluid nozzle.
- a three-fluid nozzle in which two liquid flow paths are integrated but integrated immediately before the nozzle is shown in FIGS. 12A to 12C as a third embodiment.
- the liquid channel is branched into two sub liquid channels 32 and 33, and these are integrated at the terminal side of each sub liquid channel 32 and 33 to mix the liquid.
- the liquid mixing chamber 30 communicates with the liquid mixing chamber 30.
- the sub liquid channels 32 and 33 are respectively supplied with different liquids to be mixed. Further, the sub liquid flow paths 32 and 33 improve the flow velocity by narrowing the portion communicating with the liquid mixing chamber 30. In this way, the liquids can be efficiently mixed in the liquid mixing chamber 30 by increasing the flow velocity of each liquid before being introduced into the liquid mixing chamber 30.
- the configuration of other members, such as the first gas flow path, is substantially the same as that of the second embodiment shown in FIG. Even in such a configuration, the liquid film flow that is thicker than the conventional film can be efficiently crushed and made into fine particles as in the second and first embodiments.
- the liquid mixing chamber 30 for mixing the liquid is disposed immediately before the nozzle.
- the reactivity between the liquids is high, and it is suitable for the atomization of the liquid that is difficult to maintain for a long time in the mixed state.
- the number of mixed liquids is not limited to two liquids, and may be three liquids or more.
- the present invention can be applied not only to mixing different liquids but also to a configuration in which the same kind of gas is mixed. (Example 4)
- the structure for branching the liquid flow path is not limited to the straight type, but can also be applied to the annular liquid ejecting apparatus as in the first embodiment.
- the liquid ejecting apparatus 400 shown in this figure is provided with a liquid mixing chamber 30B that mixes two liquids respectively supplied from two sub liquid flow paths 32B and 33B, and a baffle structure 40 that rectifies the flow of fluid. .
- the mixed liquid can be discharged smoothly and made into fine particles.
- the outlet structure and the slit outlet of the mixing structure using the baffle structure that rectifies the flow of the fluid and the path through which the multi-tube liquid is passed using the plurality of sub liquid flow paths are arranged at appropriate positions.
- the liquid can be mixed without waste.
- the liquid ejecting apparatus and the liquid ejecting method according to the present invention can be suitably used for generating fine particles in the fine chemical field.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
Abstract
Description
(実施例1)
(本体部1)
(ノズル部10)
(実施例2)
(実施例4)
1、1B…本体部
2、2B、2C…液体流路
3…気体流路
4…第一気体流路;4a…メイン流路;4b…液体噴射口を設けた領域;4c…開口部
5…第二気体流路
6…液体供給口
7…第一気体供給口
8…第二気体供給口
9…バッファ室
10、10B…ノズル部
12、12B…液体噴射口
13…気体噴射口
14…第一気体噴射口
15…第二気体噴射口
16…第一ノズル傾斜面
17…第二ノズル傾斜面
21…第一本体傾斜面
22…第二本体傾斜面
30、30B…液体混合室
32、32B、33、33B…サブ液体流路
40…バッフル構造
80…ノズル
85…供給口
87…傾斜面
88…薄膜流
89…液滴
Claims (12)
- 液体を、加圧された気体でもって微粒子化して噴射する液体噴射装置であって、
内部に加圧気体を供給するための気体流路と、液体を供給するための液体流路を設けた本体部と、
前記本体部に、液体を噴射する液体噴射口をスリット状に開口させたノズル部と、
を備えており、
前記ノズル部は、前記液体噴射口を中心とする側面にノズル傾斜面を備えており、
前記ノズル傾斜面と、前記本体部との間で、加圧気体を噴射するための気体噴射口を画定しており、
前記液体噴射口が、前記液体流路と連通されており、前記気体噴射口が、前記気体流路と連通されており、
前記ノズル傾斜面は、断面視において液体噴射口の延長線上で交差するよう形成されており、
前記加圧気体を、ノズル傾斜面に沿って傾斜させて噴射し、液体を挟み込むようにして交差させ、もって液体を破砕して微粒化させて噴射させてなることを特徴とする液体噴射装置。 - 請求項1に記載の液体噴射装置であって、
前記ノズル傾斜面が、液体噴射口を中心として、第一ノズル傾斜面と第二ノズル傾斜面で構成されており、
前記気体流路が、
前記第一ノズル傾斜面に面した第一気体噴射口に連通された第一気体流路と、
前記第二ノズル傾斜面に面した第二気体噴射口に連通された第二気体流路と、
で構成されてなることを特徴とする液体噴射装置。 - 請求項1又は2に記載の液体噴射装置であって、
前記液体噴射口を、該液体噴射口から噴射される微粒子が前記本体部の延長方向に対して直交方向を中心に進行するよう形成してなることを特徴とする液体噴射装置。 - 請求項1から3のいずれか一に記載の液体噴射装置であって、
前記ノズル傾斜面の傾斜角度が、20°~70°に形成されてなることを特徴とする液体噴射装置。 - 請求項1から4のいずれか一に記載の液体噴射装置であって、
前記本体部を、円筒状に構成し、
前記液体噴射口を円周状に開口して、微粒子をリング状に放出してなることを特徴とする液体噴射装置。 - 請求項5に記載の液体噴射装置であって、
前記第一気体流路が、前記本体部内を延長されると共に、前記液体噴射口と対応する領域を通過させた後、折り返されて、前記第一気体噴射口に連通されてなることを特徴とする液体噴射装置。 - 請求項5又は6に記載の液体噴射装置であって、
前記第一気体流路が、前記本体部内の中心軸に沿って、前記液体噴射口と対応する領域を超えて延長されたメイン流路と、
前記液体噴射口と対応する領域を超えた部位に開口された開口部と連通させたバッファ室と、
を備えており、
前記メイン流路に供給され、前記開口部を通じて前記バッファ室に送出された第一気体が、該バッファ室でもって整流されるよう構成されてなることを特徴とする液体噴射装置。 - 請求項1又は2に記載の液体噴射装置であって、
前記液体噴射口を直線状のスリットに開口し、前記本体内に延長された液体流路の延長方向と平行方向に、該液体噴射口から噴射される微粒子が進行するよう形成してなることを特徴とする液体噴射装置。 - 請求項1から8のいずれか一に記載の液体噴射装置であって、
前記液体流路が、複数のサブ液体流路に分岐されており、各サブ液体流路から供給される液体が、前記液体噴射口の前段で統合されてなることを特徴とする液体噴射装置。 - 請求項1から9のいずれか一に記載の液体噴射装置であって、
前記液体噴射口のスリット幅d3を、前記第一気体噴射口のスリット幅d1又は第二気体噴射口のスリット幅d2よりも広くしてなることを特徴とする液体噴射装置。 - 請求項1から10のいずれか一に記載の液体噴射装置であって、
前記液体噴射口のスリット幅d3を、前記第一気体噴射口のスリット幅d1又は第二気体噴射口のスリット幅d2に対して、
d3≧1.5d1、又は
d3≧1.5d2
としてなることを特徴とする液体噴射装置。 - 液体を、加圧された気体でもって微粒子化して噴射する液体噴射方法であって、
液体を液体流路を通して供給し、該液体流路の端縁が平面状に画定された液体噴射口を通じて、該液体を液膜流に形成する工程と、
加圧された気体が第一気体と第二気体を含み、
第一気体を、前記液体流路と平行に延長された第一気体流路を通して供給し、
第二気体を、前記液体流路と平行に延長された第二気体流路を通して供給し、
前記液体噴射口の平面を中心として、左右に配置されると共に、
前記第一気体流路の端縁が平面状に画定された第一気体噴射口、及び
前記第二気体流路の端縁が平面状に画定された第二気体噴射口を通じて、第一気体及び第二気体を、第一高速気体流及び第二高速気体流にそれぞれ形成すると共に、
前記第一高速気体流と第二高速気体流の平面が、前記液膜流の平面上で交差するよう噴射され、もって前記液膜流を液体の微粒子状にする工程と、
を含むことを特徴とする液体噴射方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US14/388,446 US10556246B2 (en) | 2012-03-28 | 2013-03-23 | Liquid ejecting device and method of liquid ejection |
JP2014507842A JP6159711B2 (ja) | 2012-03-28 | 2013-03-23 | 液体噴射装置及び液体噴射方法 |
EP13769332.1A EP2832451A4 (en) | 2012-03-28 | 2013-03-23 | LIQUID EJECTION APPARATUS AND LIQUID EJECTION METHOD |
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JP2012-074616 | 2012-03-28 | ||
JP2012074616 | 2012-03-28 |
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WO2013146624A1 true WO2013146624A1 (ja) | 2013-10-03 |
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US (1) | US10556246B2 (ja) |
EP (1) | EP2832451A4 (ja) |
JP (1) | JP6159711B2 (ja) |
TW (1) | TW201410331A (ja) |
WO (1) | WO2013146624A1 (ja) |
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CN106870073A (zh) * | 2017-04-01 | 2017-06-20 | 北京凯德斯环保科技有限公司 | 一种高效防结晶尿素喷嘴 |
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