JPH09201522A - Finely granulating apparatus and finely granulating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To get rid of wear of a part with which a fluid comes into collision in a liner material and provide finely granulating function stably for a long duration. SOLUTION: This apparatus is so composed by arranging a plurality of blocks practically closely, in which through holes 10a, 10b, 11a, 12a, 12b to pass a fluid to be finely granulated are formed, as to set the direction of the through holes along the flow of a fluid. In this case, at least two through holes are formed in a block 10 in the fluid introducing side, one in an intermediate block 11, and at least two in a block 12 in the fluid discharging side. Moreover, groove-like routes 10e, 10f, which are to be communicated with through holes in respectively neighboring blocks, change the flow of a fluid into countercurrent flow, and provide swirling force, are formed in the block surface, which is either the opposing face to the block 10 or the opposing face to the intermediate block 11. Furthermore, groove-like routes 12e, 12f, which are made to communicate with through holes in respectively neighboring blocks, change the flow of a fluid passing the through hole 11a of the intermediate block 11 into the flow along the block surface, and damp the swirling force, are formed in the block surface, which is either the opposing face to the intermediate block 11 or the opposing face to the block 12 in the discharging side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for atomizing various substances, and more specifically, it is capable of instantaneously emulsifying, dispersing or pulverizing by suspending a liquid in which a material is suspended at high pressure. The present invention relates to an atomizing device and an atomizing method for pulverizing.

[0002]

2. Description of the Related Art Conventionally, as this type of atomizing device, for example, an emulsifying device described in JP-A-2-261525 is known. As shown in FIG. 7, this emulsification device includes two liner members 50, 5 each having a mixed liquid flow path made of a hard plate material.
The first liner member 50, which is closed by 1 and disposed on the inflow side, has two through holes 50a and 50b and a first groove-shaped passage 50c communicating with each through hole outlet, and The second liner member 51 arranged on the downstream side in close contact with the first liner member 50 has the second groove-shaped passage 51c arranged in a direction orthogonal to the first groove-shaped passage 50c and both ends thereof. Through holes 51a and 51b for discharging the mixed liquid are formed therein. These first
By passing the high-pressure mixed liquid through the second liner members 50 and 51, the mixed liquid is forced to flow countercurrently, accelerated, and collided for emulsification.

[0003]

However, in the conventional emulsifying apparatus, although the wear resistant material such as the sintered diamond and the artificial sapphire is used for the liner member, the groove shape in which the mixed liquid collides at the maximum flow velocity is used. The central portions of the passages 50c and 51c are significantly worn, and if they are continuously used, a decrease in atomization performance cannot be avoided. Therefore, in order to maintain the emulsification performance, the expensive liner member must be periodically replaced, and therefore the life of the liner member is required to be extended.

Further, in this type of emulsifying apparatus, it is not possible to reduce the pressure pump of the mixed liquid and its power in order to obtain a predetermined atomization effect, so that the apparatus cannot be downsized to save energy. There is also a problem.

The present invention has been made in consideration of the problems in the conventional emulsifying apparatus as described above, and reduces the wear generated in the fluid collision portion of the liner member to stably achieve the atomization operation for a long period of time. (EN) Provided are an atomizing device and an atomizing method which can be exhibited and which can enhance the atomizing effect and save energy.

[0006]

Means for Solving the Problems The atomizing device of the present invention comprises:
In the atomization device, in which a plurality of blocks each having a through hole through which the fluid to be atomized can be formed are disposed in close contact with each other so that the penetration direction is along the flow direction of the fluid,
At least two through holes are formed in the fluid introduction side block, at least one through hole is formed in the intermediate block, and at least two through holes are formed in the fluid discharge side block, and they are adjacent to either block surface of the opposing surfaces of the introduction side block and the intermediate block. Forming a groove-shaped passage that communicates with the through-hole of each block and changes the fluid into an opposing flow and imparts a swirling force, on any one of the opposing surfaces of the intermediate block and the discharge side block,
The gist of the present invention is to form a groove-shaped passage that communicates with the through holes of the adjacent blocks, changes the flow of the fluid passing through the through holes of the intermediate block in the direction along the block surface, and attenuates the swirling force.

In the above atomizer, it is preferable that the groove-shaped passage has a cross-sectional shape of a round groove or a U-shaped groove. Further, each of the above blocks can be made of a wear resistant member such as ceramics, cemented carbide or diamond.
The fluid in the present invention refers to a liquid fluid containing a material consisting of liquid or powder, and when liquid is selected as the material, emulsification is performed, and when powder is selected, dispersion and fine pulverization are performed. In emulsification, various droplets of various hydrophobic substances in water, various droplets of various hydrophilic substances in oil, etc. are shown.
For dispersion, fine particle metal oxides, other inorganic pigments,
Agglomeration and disintegration in liquids such as organic pigments are shown, and fine pulverization shows that single particles are made finer in liquids such as metal oxides, other inorganic pigments and organic pigments. Further, in order to collide the fluid at an ultra-high speed, it is preferable to pressurize the fluid to be introduced into the atomizer to 100 to 3000 kg / cm ² using, for example, a high pressure pump.

Further, at least two through holes in the introduction side block and the discharge side block may be formed in the block, but more holes may be formed. When three or more through holes are formed, it is preferable that the blocks be communicated with each other through a groove-shaped passage extending radially from the center of the block.

Further, in the above-mentioned atomization device, the groove-shaped passage of the introduction-side block includes, for example, a bottomed cylindrical concave portion arranged at the center of two through holes and an edge portion of the bottomed cylindrical concave portion. It can be configured by a groove-shaped passage that extends in a curved manner in the opposite direction and that communicates the two through holes in an S-shape. Further, the groove-shaped passage of the discharge side block can be configured by a groove-shaped passage that is arranged symmetrically with the groove-shaped passage with respect to the facing surface. In short, the groove-shaped passages in the introduction side block and the discharge side block can use a passage of any shape as long as it can give a swirling force to the counter flow and can damp the given swirling force. You can

Further, the atomizing method of the present invention introduces the fluid into three blocks which have through holes along the flow path of the fluid to be atomized and which are disposed substantially in close contact with each other, and at high speed. It is a atomization method that atomizes by colliding, changing the fluid introduced from the through hole of the fluid introduction side block to a counter flow and imparting a swirling force to cause collision, and the fluid in the through hole of the intermediate block While maintaining the swirling state, the flow is changed to the flow path direction, and the flow of the fluid passing through the intermediate block in the discharge side block is changed to the direction orthogonal to the flow path while the swirling force is attenuated and discharged from the through hole. Is the gist.

According to the present invention, the fluid guided in the groove-shaped passage formed on either of the facing surfaces of the introduction block and the intermediate block is accelerated into a counterflow and the swirling force is increased. They collide in the applied state, and a swirl flow is generated. The fluid that has become a vortex flow is guided to the through hole of the intermediate block having a cross-sectional area larger than the cross-sectional area of the groove-like passage, thereby reducing collision energy and maintaining the vortex state. To be done. Then, it collides with the facing surface of the discharge side block and atomizes again, and the flow of the fluid is changed by the groove-shaped passage in the direction orthogonal to the flow passage, and the fluid is discharged from the through hole while the swirling force is attenuated. To be done. As described above, in the present invention, in addition to atomization by collision, a swirling force is applied to a fluid to accelerate a turbulent state, and then the swirling force is attenuated to obtain a further atomization effect.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 shows a schematic structure of an atomizing system including an atomizing apparatus and peripheral equipment applied to the atomizing method of the present invention. The configuration is such that an aqueous fluid and an oil fluid are drawn separately. It is made to be a mixed liquid (fluid to be atomized) by merging with, and the mixed liquid is pressure-fed to an atomizer using a high-pressure pump, and emulsification, dispersion or fine pulverization is performed in the atomizer. . The configuration of each unit will be described below.

In the figure, the atomization system 1 is provided with a container 2 for storing an aqueous fluid and a container 3 for storing an oil fluid, and each fluid in these containers 2 and 3 is The flow rates are adjusted by the valves 4 and 5, respectively, are joined by the pipe 6, and are supplied to the suction port of the high-pressure pump 7. The high-pressure pump 7 is adapted to pressurize the mixed solution to 1000 to 1500 kg / cm ² to form an ultra-high-speed flow, and then introduce it into the atomizer 8. As shown in FIG. 2, the atomizing device 8, which is a characteristic part of the present invention, has a disc-shaped disc 10 as a fluid introduction side block, a disc-shaped disc 11 as an intermediate block, and a disc 12 as a fluid discharge side block. Are arranged in series along the flow path and in close contact with each other in the cylindrical container 9 in the order described above. In addition,
In the figure, the disks 10 and 11 are shown for ease of explanation.
Are shown separated from each other, and the disk 12 is developed so that the shape of the groove-like passage formed on the facing surface can be seen.
In the following description, the upstream surface of each disk is called the front surface, and the downstream surface is called the back surface.

The disk 10 is composed of a wear resistant member such as ceramics, cemented carbide, diamond, etc., having a diameter of 10 mm and a thickness of 3 mm. This disk 10 has two through holes 10a, 1 having a diameter of 0.5 mm at two concentric circles.
0b is formed. The back surface 10c of this disc 10
A swirl chamber 10d formed of a bottomed cylindrical recess having a depth of 0.05 mm is formed in the central portion.

The outlet portion 10a 'of the introduction through hole 10a, the spiral chamber 10d, and the outlet portion 10b' of the introduction through hole 10b.
Is a groove-shaped introduction passage 10 having a width of 0.1 mm and a depth of 0.05 mm.
It is connected in an S shape by e and 10f. More specifically, the groove-shaped introduction passage 10e is formed so as to extend in the tangential direction from the edge of the spiral chamber 10d and to be curved, and the groove-shaped introduction passage 10f is similarly formed to the edge of the spiral chamber 10d. And is formed to be curved starting from a position facing each other in the diametrical direction. With such a configuration, countercurrents A ′ and B ′ that flow toward the spiral chamber 10d are formed.

The disk 11 has the same diameter as the disk 10,
An intermediate through hole 11a having the same thickness and the same material and having a cross-sectional area larger than the cross-sectional area of the groove-shaped introduction passage 10e and having a diameter of 0.14 mm is formed at a position corresponding to the spiral chamber 10d.

The disk 12 is made of the same diameter, the same thickness, and the same material as the disk 10, and has discharge through holes 12a, 12b having a diameter of 0.6 mm formed at two locations on a concentric circle, and its center portion. Is a storage chamber 12 formed of a bottomed cylindrical recess
d is formed. The inlet portion 12a 'of the discharge through hole 12a, the storage chamber 12d, and the inlet portion 1 of the discharge through hole 12b.
2b 'is communicated in an S-shape by the groove-shaped discharge passages 12e and 12f. The groove-shaped discharge passages 12e, 12f are formed in a forward direction with respect to the spiral direction, that is, in an inverted S shape (as viewed from the fluid downstream side), whereby the spiral flow C is formed.
Change the flow of toward the outer circumference of the disk 12,
It is designed to reduce the turning force.

By adjusting the diameter of the intermediate through hole 11a formed in the disk 11, the flow velocity flowing in the groove-shaped introduction passages 10e, 10f in the disk 10 can be set to a desired value.

Further, FIG. 3 shows that the groove-shaped passage of the disk 12 is
It is formed in a direction opposite to the spiral direction, that is, in an S shape (as viewed from the fluid downstream side). According to this configuration,
As compared with the disk 12 shown in FIG. 2, the effect of damping the turning force is enhanced.

Next, the operation of this embodiment having the above configuration will be described with reference to FIG. When the fluid pressurized by the high-pressure pump 7 and made into an ultra-high-speed fluid is introduced into the atomizer 8, first, the fluid is branched into a flow A and a flow B in the cylindrical volume 9, and the introduction through holes 10a and 10b are introduced. After passing through and colliding with the facing surface of the disk 11, the groove-shaped introduction passages 10e, 10
Guided in f, the direction of the disk 10 is forcibly changed toward the center of the disk 10 to form a counterflow. The fluid is then accelerated,
The spiral chamber 1 faces the spiral chamber 10d from the tangential direction thereof.
The fluid A ′ and the fluid B ′ merge in the swirl chamber 10 d to collide with each other, atomize, and generate a swirl flow C. Next, the atomized fluid in the spiral chamber 10d is delivered to the disk 12 while passing through the intermediate through hole 11a while maintaining the spiral state. At this time, the through hole 11
Since the cross-sectional area of a is formed larger than that of the groove-shaped passages 10e and 10f, the collision energy is increased by the through hole 11a.
And the wear generated in the fluid collision portion of the disk 10, that is, in the spiral chamber 10d is reduced. The fluid delivered in the spiral state further collides with the storage chamber 12d of the disk 12 to be atomized again. Then, it is divided into groove-shaped passages 12e and 12f, the flow of which is changed in the direction orthogonal to the flow passage, and the spiral state is attenuated,
It is discharged from the discharge through holes 12a and 12b.

[0021]

EXAMPLES Next, the results of emulsification, dispersion and pulverization using the atomizing apparatus of the present invention are shown below. In addition, micro
The results of experiments under the same conditions using a device M-110Y manufactured by Fluidizer (hereinafter referred to as M company) and a device LA-33 manufactured by Nanomizer (hereinafter referred to as N company) are shown as comparative examples. Measuring device: Shimadzu Corporation laser diffraction particle size distribution measuring device SALD-2000A Evaluation procedure: 200 cc of purified water was put into the stirring tank of the measuring device,
Circulate. The peak of the diffraction / scattered light intensity graph is 40%
Add experimental sample in small amounts until. Turn on the ultrasonic switch and press the measurement start key after 1 minute. Evaluation method: Among the items of the measurement result, the median diameter is evaluated.

Emulsification experiment [Sample 1] (1) Content of sample: soybean oil (Junsei Kagaku Co., Ltd. cosmetic raw material 43011-2401) 20 wt% soybean lecithin (Junsei Kagaku 86015-1201) 1 wt% purified water (Junsei Kagaku Co., Ltd. 91308-2163) 79wt% (2) Pretreatment: Heat purified water to 60 ° C and add soybean lecithin to it. The above is stirred with a desktop mixer (RW20-DZM rotation speed: 1200 rpm, manufactured by IKA) to dissolve lecithin. Soybean oil is added to the above, and the mixture is stirred for 3 minutes with the tabletop mixer (rotation speed: 2000 rpm) to preliminarily emulsify. (3) Median diameter before injection: 20.127 μm (4) Experimental results

[0023]

[Table 1]

[Sample 2] (1) Sample content: Liquid paraffin (Junsei Kagaku Co., Ltd. 83640-0430)… 25wt% Twin 20 (Junsei Kagaku Co., Ltd. 69295-1610)… 2wt% Purified water (Junsei Kagaku Co., Ltd. ) 91308-2163)… 73wt% (2) Pretreatment: Add Twin 20 to purified water. The above is stirred with the above-mentioned tabletop mixer (rotation speed: 1200 r.p.m) to dissolve the Twin 20. Liquid paraffin is added to the above, and the mixture is stirred for 3 minutes with the above-mentioned tabletop mixer (rotation speed: 1800 r.p.m) to preliminarily emulsify. (3) Median diameter before charging: 32.989 μm (4) Experimental results

[0025]

[Table 2]

Dispersion experiment [Sample 1] (1) Content of sample: Titanium oxide (Junsei Kagaku Co., Ltd. 53145-0601) ... 15wt% DEMOL EP (special polycarboxylic acid type polymer surfactant: manufactured by Kao Co., Ltd.) … 1wt% purified water (Junsei Kagaku Co., Ltd. 91308-2163)… 84wt% (2) Pretreatment: Purified water with demolition EP added. The above is stirred with a tabletop mixer (rotation speed: 1000 rpm) to dissolve Demol EP. Titanium oxide is added to the above, and the mixture is preliminarily dispersed by stirring for 1 minute with the tabletop mixer (rotation speed: 2000 rpm). (3) Median diameter before injection: 9.008 μm (4) Experimental results

[0027]

[Table 3]

[Sample 2] (1) Sample content: Phthalocyanine Blue (Junsei Kagaku Co., Ltd. 63280-1610)… 25wt% DEMOL EP (manufactured by Kao Corporation)… 1wt% Purified water (Junsei Kagaku Co., Ltd. 91308- 2163) ... 74wt% (2) Pretreatment: Add demol EP to purified water. The above is stirred with the tabletop mixer (rotation speed: 1000 r.p.m) to dissolve the Demol EP. Phthalocyanine blue is added to the above, and the mixture is preliminarily dispersed by stirring for 2 minutes with the tabletop mixer (rotation speed: 1500 r.p.m). (3) Median diameter before injection: 16.229 μm (4) Experimental results

[0029]

[Table 4]

Fine Grinding Experiment [Sample 1] (1) Sample Content: Calcium Carbonate (Junsei Kagaku Co., Ltd. 43260-0301)… 25wt% Trisodium Citrate (Junsei Kagaku Co., Ltd. 26080-1201)… 0.8wt% Purification Water (Junsei Kagaku Co., Ltd. 91308-2163) 74.2wt% (2) Pretreatment: Add trisodium citrate to purified water. The above is stirred with a tabletop mixer (rotation speed: 1300 rpm) to dissolve trisodium citrate. Calcium carbonate is added to the above, and the mixture is stirred for 4 minutes with the above-mentioned tabletop mixer (rotation speed: 1300 rpm) to perform preliminary dispersion. (3) Median diameter before injection: 20.329 μm (4) Experimental results

[0031]

[Table 5]

[Sample 2] (1) Sample content: Aluminum silicate (Junsei Kagaku Co., Ltd. 29020-1601)… 20wt% Sodium hexametaphosphate (Junsei Kagaku Co., Ltd. 67115-0401)… 1wt% Purified water (Junsei Kagaku) 91308-2163)… 79wt% (2) Pretreatment: Add sodium hexametaphosphate to purified water. The above is stirred with a tabletop mixer (rotation speed: 1500 r.p.m) to dissolve sodium hexametaphosphate. Aluminum silicate is added to the above, and the mixture is preliminarily dispersed by stirring for 5 minutes with the tabletop mixer (rotation number: 1800 r.p.m). (3) Median diameter before injection: 5.127 μm (4) Experimental results

[0033]

[Table 6]

From the above experimental results, it was confirmed that the atomizing device of the present invention can enhance the atomizing effect compared to the conventional device in any of the emulsification, dispersion, and pulverization experiments. In addition, in the emulsification experiment, emulsification was performed continuously, and after a predetermined time elapsed, the atomization device was disassembled and the wear on each disk was inspected. It was confirmed that it can be carried out stably.

4 and 5 show another embodiment of the atomizer. The same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted. FIG.
The disk 13 shown in FIG. 2 has through holes 13 at two locations on the concentric circumference.
a and 13b, and a back surface 13c thereof is formed with a bottomed cylindrical recess 13d. This swirl chamber 1
From 3d, groove-shaped linear passages 13e and 13f extending in the tangential direction in opposite directions are formed, and the through holes 13a and 1 are formed.
It communicates with the outlet of 3b. Even with such a structure, a spiral flow can be formed as in the above-described embodiment. Incidentally, the disc 14 arranged on the downstream side of the disc 11 has discharge through holes 14a and 14b, and like the disc 12 shown in FIG. 2, the disc 14 is formed at a position symmetrical to the groove-shaped linear passages 13e and 13f. Linear passages 14e and 14f are formed. Reference numeral 14d in the figure is a storage chamber.

FIG. 5 shows the disk 14 shown in FIG.
The groove-shaped passage of FIG. 4 is formed in the direction opposite to the spiral direction. According to this configuration, the disk 14 shown in FIG.
Compared with, the damping effect of the turning force is enhanced. In this embodiment, the block is formed of a disc-shaped disk, but the shape of the block is not limited to this and may be formed of a polygon such as a square or a hexagon.

Further, in the above-mentioned embodiment, the cross-sectional shape of the groove-like passages formed in the disks 10, 12, 13 and 14 is as shown in FIG. Alternatively, it is preferable to process the groove into a semicircular shape as shown in FIG. According to the groove-shaped passage having such a cross-sectional shape, the flow coefficient can be increased.

Further, in this embodiment, each of the disks 10 to 12 is
However, the present invention is not limited to this. For example, the thickness of the disk 11 may be increased or decreased, that is, the length of the intermediate through hole may be adjusted to adjust the atomization effect. Further, in this embodiment, the back surface of the disk 10 and the disk 12 are
Although the groove-shaped passages are formed on the respective surfaces, the present invention is not limited to this, and the groove-shaped passages and the spiral chambers may be formed on the surface of the disk 11, and the groove-shaped passages and the storage chambers may be formed on the back surface thereof.

INDUSTRIAL APPLICABILITY The present invention is applied to the field of foods such as atomization of milk fat and dispersion of flavors, to the field of pharmaceuticals such as preparation of fat emulsion and cell crushing, and to the field of cosmetics such as preparation of emulsion and dispersion of pigments. , The production of various emulsion-polymerized products, the field of chemicals for crushing organic pigments, and other fields of research and development of new materials.

[0040]

As is apparent from the above description,
According to the present invention, it is possible to eliminate wear of the fluid collision portion of the liner member, to exhibit a stable atomization action for a long period of time, and to enhance the atomization effect. Further, since the atomization effect is enhanced, the high pressure pump and its power can be reduced, thereby saving energy.

According to the atomizing apparatus of the present invention, it suffices to prepare a plurality of intermediate blocks consisting of through holes having different diameters, select any one of them, and dispose them between the introduction side block and the discharge side block. It is possible to easily change the flow rate of the counterflow used for the collision. According to the atomization device of the present invention, it is possible to significantly reduce the wear of the fluid collision portion,
It does not require a high degree of wear resistance like conventional liner members. Therefore, the manufacturing cost of the atomizer can be reduced significantly.

According to the atomizing device of the present invention, the introduction side block and the discharge side block are arranged so as to be separated from each other, so that it is not necessary for the groove-shaped passages on the surfaces facing each block to be closely contacted and orthogonal to each other as in the conventional case. . Therefore, there is an advantage that the labor for positioning each block in the orthogonal direction can be saved and the processing step for positioning can be omitted.

[Brief description of drawings]

FIG. 1 is an overall schematic configuration diagram according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of an atomizing device according to a first embodiment.

FIG. 3 is a view, corresponding to FIG. 2, showing a modified example of the disk 12 according to the embodiment.

FIG. 4 is an explanatory diagram showing a configuration of a second embodiment.

5 is a view, corresponding to FIG. 4, showing a modified example of the disk 14 according to the embodiment.

FIG. 6 is an explanatory view showing a cross-sectional shape of the groove-like passage according to the embodiment.

FIG. 7 is a cross-sectional view showing a configuration of a conventional atomizing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Atomization system 2,3 Container 4,5 Valve 6 Piping 7 High pressure pump 8 Atomization device 9 Cylindrical part 10 1st disk 10a, 10b Through hole 10c Adhesion facing surface 10d Swirl chamber 10e, 10f Groove passage 11 Second Disk 11a through hole 12 third disk 12a, 12b through hole 12e, 12f groove-like passage 12d storage chamber

Continuation of front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI technical display location // C01F 11/18 C01F 11/18 G (72) Inventor Kazutoshi Hasegawa 1-7- Shozusawa, Itabashi-ku, Tokyo 14 Genus Inc. (72) Inventor Yoshihiro Furukawa 1-7-14 Shozusawa, Itabashi-ku, Tokyo Genus Inc. (72) Inventor Somitsu Fujishima 1-7-14 Shozusawa, Itabashi-ku, Tokyo Genus Inc. (72) ) Inventor Fumio Yasuda Genus Co., Ltd. 1-7-14 Shozuzawa, Itabashi-ku, Tokyo

Claims (3)

[Claims] 1. A atomization apparatus in which a plurality of blocks, each having a through hole through which a fluid to be atomized is formed, are disposed substantially in close contact with each other so that the penetrating direction is along the flow direction of the fluid. At least two through holes in the introduction side block,
One is formed in the intermediate block, and at least two are formed in the fluid discharge side block. The block surface of any of the facing surfaces of the introduction side block and the intermediate block is communicated with the through holes of the adjacent blocks. Forming a groove-shaped passage that gives a swirling force while changing the fluid to the counter flow,
Any one of the block surfaces on the facing surface of the intermediate block and the discharge side block is in communication with the through hole of each adjacent block, and the flow of the fluid passing through the through hole of the intermediate block is directed along the block surface. An atomization device, characterized in that a groove-shaped passage is formed to change and attenuate the swirling force. 2. The groove-shaped passage has a circular groove or U-shaped cross section.
The atomization device according to claim 1, which is a groove. 3. Atomization is performed by introducing the fluid into three blocks which have through holes along the flow path of the fluid to be atomized and which are disposed substantially in close contact with each other and collide at high speed. A method of atomizing, in which the fluid introduced from the through hole of the fluid introduction side block is changed into a counterflow and a swirl force is applied to cause collision, and the swirl state of the fluid is maintained in the through hole of the intermediate block. While changing the flow in the flow path direction and changing the flow of the fluid passing through the intermediate block in the discharge side block in the direction orthogonal to the flow path, the swirling force is attenuated and the fluid is discharged from the through hole. An atomization method characterized by the above.