JP2010214220A - Emulsification apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a configuration is complicated and high speed rotation is required of a rotating body for stirring when emulsification processing time is short and high quality is required of an emulsified product. <P>SOLUTION: The emulsification apparatus includes a processing tank 1 for housing processing liquid containing a material to be processed, a rotatable shaft 2 inserted to the processing tank 1, a first rotary blade 7 provided on the shaft 2, a rotary board 6 attached so as to be rotated coaxially to the center axis 21 of the shaft 2 on the upper side of the first rotary blade 7 and provided with an inversely tapered peripheral surface 61, a second rotary blade 8 provided on the rotary board 6, and a fixed blade 9 provided on the inner wall 11 of the processing tank 1. The first rotary blade 7 comprises a plurality of rod blades 71 fixed downwards at a prescribed angle in multiple stages radially in the same shape. The second rotary blade 8 comprises a plurality of vertical teeth 81. The fixed blade 9 comprises a plurality of vertical lines 91 formed at equal intervals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an emulsifying device that shears and disperses a material to be treated to emulsify or suspend it. In particular, the present invention relates to an emulsifying apparatus having a configuration in which a material to be treated is sheared and dispersed between a rotating blade and an inner wall of a processing tank while being stirred and flowed by the rotating blade.

  A machine having an operation of stirring the material to be treated is called a stirrer in a broad sense. The stirrer is classified mainly into a mixer, a kneader, a shaker, a pulverizer, a disperser, and an emulsifier depending on the purpose. The emulsifier is a stirrer intended for emulsification. Emulsifiers are widely used in the field of providing liquid products such as foods, cosmetics, pharmaceuticals, and chemicals. In the case of foodstuffs, for example, an emulsifier is used to emulsify soybean (soy milk), egg (mayonnaise), edible oil (dressing), and vegetables (sauce, sauce).

  Emulsification refers to atomizing one of the liquids that do not mix together and dispersing it in the other liquid. Therefore, the emulsifier generally has a function of pulverizing and dispersing the material to be processed which is a raw material, and may be treated as a disperser. Strictly speaking, dispersing fine solid particles that do not dissolve in a liquid is called a suspension, but in the present invention, it is called an emulsifying device including a device for atomizing a solid and dispersing it in a liquid. Since the mixer is a kind of a mixer or a kneader, the emulsifier may be called a homomixer or an emulsion mixer.

  There are two types of agitators: an open-type batch method in which a material to be processed is processed in a single step and a closed-type in-line method in which the material to be processed is continuously stirred. Also, for example, impeller type stirrer, blade type stirrer, disperser type stirrer, closed rotor type stirrer, rotor stator type stirrer, static type stirrer, turbine type stirrer, disk type stirrer, colloid mill stirrer, high pressure plunger type stirrer (high pressure homogenizer) Various agitators such as a jet mill agitator and a high-pressure jet agitator are known.

  An impeller-type stirrer, which is a typical stirrer, has a configuration in which a rotating blade (impeller) is attached to a rotating shaft (shaft) and a material to be treated is stirred by the impeller. The impeller is for stirring and flowing the material to be treated. Examples of the shape of the impeller include a paddle shape, a propeller shape, a screw shape, an axial flow turbine shape, a radiation turbine shape, an anchor shape, a ribbon shape, and a gate shape.

  The emulsification apparatus is a machine that mainly applies shearing force to the material to be treated to atomize and disperse the material to be treated, thereby emulsifying the material to prevent separation of suspended precipitates and the like. Strictly speaking, a stirrer that is an emulsifier is referred to as a homogenizer (homogenizer) or an emalda, but the entire emulsifying apparatus including the stirrer may be referred to as a homogenizer or an emulda. Since the principle of atomization of the emulsifying device mainly depends on the shearing force, a system capable of applying the shearing force is selected for the stirrer provided in the emulsifying device. In particular, an impeller type stirrer, a rotor stator type stirrer, a high pressure plunger type stirrer, and a high pressure jet stirrer are widely used.

  The atomization of the material to be treated by the shearing force in the stirrer of the emulsifier includes the function of a pulverizer. There are two types of pulverizers: a media mill system that helps pulverize the material to be processed by collision with the pulverization medium (media), and a medialess system that pulverizes the material to be processed only by collision between the materials to be processed without using the pulverization medium. . In a medialess type pulverizer, fine particles of the pulverized media generated by abrasion are not mixed in the material to be treated, so that there is very little contamination. Therefore, it is desirable that the stirrer applied to the emulsification apparatus is a medialess system. In addition, the pulverizer includes a dry type in which the material to be processed is handled as it is and a wet type in which the material to be processed is mixed with a liquid. Since the emulsifying device is a device that uniformly disperses liquid or solid in the liquid, the stirrer applied to the emulsifying device is substantially wet.

  The homogenizer broadly means that the material to be treated is caused to flow in the clearance between the stirring members or between the stirring member and the inner wall of the treatment tank, including when the material to be treated is solid, It refers to all emulsifiers that repeatedly disperse and atomize the material to be treated to produce an emulsion (emulsion) or suspension (suspension).

  As a homogenizer, the rotor at the tip of the shaft is rotated at a high speed of 6000 rpm / min or higher so that the material to be treated is sucked from the bottom and flows into the slight clearance formed between the stator and the clearance. 2. Description of the Related Art A rotor stator type stirrer is well known in which a material to be treated is atomized by the generated shearing force and collision, and stirred by convection of a treatment liquid formed by an upward flow generated by jetting upward. In addition, a Reeves type rotor stator type stirrer configured to suck the material to be treated from above and eject it downward may be employed. The ultramixer is a kind of homomixer, and is an emulsifying device including a homogenizer configured to eject a material to be processed that is strongly sucked by a turbine rotor that rotates at a high speed.

  In a broad sense, Emulda generally refers to an emulsifier that produces an emulsion by atomizing a liquid that does not mix with the liquid and uniformly dispersing the liquid. The material to be processed flows through the clearance formed by the rotor that has rotating teeth that rotate at high speed and the stator that is a housing in which vertical or spline-shaped grooves are formed and fixed teeth are formed. 2. Description of the Related Art A rotor stator type emulder that emulsifies a material to be treated with shearing force and dispersion force is well known.

  The stirrer applied to the emulsifying apparatus has advantages and disadvantages, and a method and a type that are suitable for the type of material to be treated and the purpose of the emulsified product to be produced are selected. The impeller type stirrer has a very excellent advantage that the configuration is considerably simpler than other types of stirrers. Further, there is an advantage that the impeller is not rotated at a higher speed than the rotor stator type. For this reason, emulsifiers equipped with impeller-type stirrers are widely used in many manufacturing industries that produce emulsions or suspensions.

  An emulsifying device equipped with an impeller-type stirrer is, for example, as shown in Patent Document 1, an inner wall surface including a plurality of paddle-type impellers or anchor-type impellers provided in several stages on a shaft and a bottom surface of a treatment tank The material to be treated is emulsified by applying shearing and dispersion due to contact, collision, and diffusion of the material to be treated that occur in the clearance formed between the two.

  In an emulsifying apparatus equipped with an impeller-type stirrer, a plurality of baffles (baffles) may be provided at equal intervals on the inner wall of the treatment tank. The baffle rectifies the flow of the processing liquid that convects up and down, improves the circulation of the processing liquid, and promotes the dispersion of the material to be processed. Further, as disclosed in Patent Document 2, a lattice-shaped groove is formed on the inner wall of the treatment tank, and dispersion is promoted by turbulent flow generated between the rotating blades and a desired emulsion or suspension. There is an emulsification apparatus configured to shorten the time for generating a turbid liquid.

  As an advanced type of emulsifier equipped with impeller type stirrer, multiple types of stirrer are installed side by side to further improve the atomization of the material to be processed and the stirring flow of the processing liquid to promote uniform dispersion of the material to be processed There is an emulsifying device equipped with a composite impeller type stirrer. For example, there is an emulsification apparatus configured to suck up and stir a material to be processed from the bottom of a processing tank by providing a rotor on the tip end side of a shaft of an impeller type stirrer and combining a rotor stator type stirrer.

Japanese Patent No. 3533407 JP 2007-125454 A

  In the impeller-type stirrer, there is a limit to precisely reducing the clearance between the impeller and the inner wall of the treatment tank in accordance with the required particle size. Further, the rotational speed of the impeller is set lower than the rotational speed of the rotating body in other types of stirrers. Therefore, since the effect | action of atomization of a to-be-processed material is comparatively small, an emulsification rate is slow and there exists a disadvantage which requires comparatively time for the production | generation of an emulsified product. In particular, when the material to be treated is a solid powder, even if the material to be treated is preliminarily pulverized by a pulverizer and the particle size is made sufficiently small, the speed at which fine particles are homogenized and uniformly dispersed However, compared with other types of stirrers, there is a demand for shortening the time required to produce an emulsified product and improving the quality of the emulsified product.

  Although it is conceivable to adopt the media mill method to promote atomization of the material to be processed, the burden of removing fine particles of the pulverized media after emulsification is increased due to increased contamination by fine particles of the pulverized media caused by wear. The quality of the emulsified product is deteriorated due to the large or incomplete removal.

  In order to achieve uniform atomization of the material to be processed by the medialess method, rotate the impeller at an unnecessarily high speed or install another type of stirrer with a large stirring force in parallel, The impeller type stirrer, which is extremely simple in structure, loses the maximum benefit of the impeller, and there is a risk of impeller damage due to high speed rotation. If the agitating member wears due to the impact at the time of collision and the metal powder is mixed into the processing liquid, fatal contamination may occur, and a safe emulsified product may not be obtained.

  In view of the above problems, an object of the present invention is to provide an emulsification apparatus that can more efficiently produce a product having a quality required by a simple configuration and a safe rotational speed of a rotary blade. Specific advantages of the emulsifying device of the present invention will be described in detail in the description of the embodiments.

  In order to solve the above problems, the emulsifying device of the present invention has a treatment tank (1) that contains a treatment liquid containing a material to be treated, and a rotatable shaft that is inserted into the treatment tank (1). (2), a first rotating blade (7) composed of a plurality of rod blades (71) fixed downward in a multistage manner with a predetermined angle (θ) in a dissipative shape on the shaft (2), and a first rotating blade A rotating disk (6) having a reversely tapered peripheral surface (61) attached coaxially to the shaft (2) on the upper side of (7) and a peripheral surface (61) of the rotating disk (6). A second rotary blade (8) composed of a plurality of vertical teeth (81) and a fixed blade (9) composed of a plurality of vertical strips (91) formed at equal intervals on the inner wall (11) of the treatment tank (1) ), And.

  The emulsifying device of the present invention is basically an emulsifying device provided with an impeller-type stirrer and has a considerably simple structure. Therefore, the emulsifying device has few failures, is easy to maintain, and is relatively easy to manufacture. In addition, since the rotation speed of the rotating body of the stirrer is made as low as possible, the stirrer failure and the wear of the stirring member are reduced, maintenance is easy, noise and vibration are small, and there is no possibility of causing fatal contamination. .

  And since the first rotating blade is composed of a plurality of rod blades fixed in a divergent shape with multiple angles fixed downward at a predetermined angle, the processing liquid is strongly poured downward along the inner wall of the processing tank, and the lower layer processing liquid is supplied. Push up strongly along the axis of rotation to create an upward flow. Therefore, sufficient vertical convection is created. In addition, the second rotary blade formed of a plurality of vertical teeth formed on the peripheral surface of the reverse taper of the rotating disk rotating coaxially with the shaft prevents the processing liquid scattered by the first rotary blade from being scattered. At the same time, a swirling flow that flows downward along the inner wall of the treatment tank is generated, so that stirring flow by convection is further promoted and uniform dispersion is promoted. As a result, the material to be processed is uniformly dispersed in a shorter time.

  In addition, since the first rotary blade is composed of a large number of rod blades arranged in a diffused shape, and the fixed blade is formed on the inner wall of the treatment tank, the first rotary blade is between the first rotary blade and the fixed blade. Many powerful transverse vortices are generated around an axis parallel to the central axis of the shaft. The contact, collision, and diffusion of the material to be processed are more effectively performed by the horizontal vortex generated at the blade tip of the first rotary blade, and sufficient shearing force and dispersion force are generated between the first rotary blade and the fixed blade. Is obtained, and the material to be processed is uniformly finely divided and uniformly dispersed in a short time. As a result, the emulsification treatment time is sufficiently shortened and the quality of the emulsified product is improved.

It is the side surface sectional view and bottom surface sectional view which show the whole structure of the emulsification apparatus of this invention. It is a perspective view which shows the structure of the rotary blade in the emulsification apparatus of embodiment. It is a perspective view which shows the structure of the fixed blade | wing in the emulsification apparatus of embodiment. It is sectional drawing which shows the flow state of the process liquid in the emulsification apparatus shown by FIG.

  FIG. 1 shows the overall configuration of the emulsification apparatus of the present invention. FIG. 2 shows a rotating part composed of a shaft, a boss, and a rotating disk. In particular, FIG. 2 shows the structure of a first rotating blade provided on the boss and a second rotating blade formed on the peripheral surface of the rotating disk. FIG. 3 shows the inside of the treatment tank. In particular, FIG. 3 shows the structure of a fixed blade formed on the inner wall of the treatment tank. FIG. 4 is a cross-sectional view of the emulsifying device as viewed from the side and the bottom, and shows the flow state of the treatment liquid. Hereinafter, specific embodiments of the emulsification apparatus of the present invention will be described with reference to FIGS. 1 to 4.

  The emulsification apparatus includes a treatment tank 1 that contains a treatment liquid containing a material to be treated as a raw material and emulsifies the material to be treated, and a shaft that is a rotatable rotary shaft member that is inserted into the treatment tank 1. 2, a motor 3 that is a drive device that rotationally drives the shaft 2, a V belt 4 that is a transmission member that transmits the driving force of the motor 3 to the shaft 2, and a boss 5 that is a reinforcement member attached to the shaft 2, And a rotary disk 6 having a reversely tapered peripheral surface 61 provided coaxially on the shaft 2.

  The first rotary blade 7 is provided on the shaft 2. The first rotary blade 7 in the emulsifying device of the embodiment is provided on a boss 5 attached to the shaft 2. The first rotary blade 7 is composed of a plurality of rod blades 71 that are diffused to the boss 5 and fixed downward at a predetermined angle in multiple stages. The second rotary blade 8 is provided on the upper side of the first rotary blade 8. The second rotary blade 8 is composed of a plurality of vertical teeth 81 formed on a reversely tapered peripheral surface 61 of the rotary disk 6. The fixed blade 9 is composed of a plurality of vertical strips 91 formed at equal intervals on the inner wall 11 of the treatment tank 1.

  The processing tank 1 is specifically a cylindrical container made of stainless steel. The emulsification device of the embodiment can generate soy milk, for example. The material to be treated that is stored in the treatment tank 1 when producing soymilk is soy flour. Soybean as a raw material is milled into soybean powder having a required particle size in advance by a mill (milling machine, pulverizer) in a preliminary process. The processing liquid in which soy flour, which is a material to be processed, is mixed when producing soymilk is water. Soy flour contained in the water stored in the treatment tank 1 is uniformly atomized and uniformly dispersed in water to produce soy milk. Therefore, the stirrer provided in the emulsification apparatus of the embodiment includes the function of a wet medialess pulverizer.

  The shaft 2 is a cylindrical rotating shaft member that can rotate around its central axis 21. The shaft 2 passes through the upper lid 12 of the processing tank 1 and is inserted into the processing tank 1. In order to reduce the occurrence of bubbles (cavities) due to cavitation, it may be required to evacuate the inside of the treatment tank 1. When the inside of the processing tank 1 is evacuated, a mechanical seal that does not hinder the rotation of the shaft 2 can be provided between the shaft 2 and the upper lid 12. About the vacuuming in the tank of the processing tank 1 in a vacuum emulsification apparatus, detailed description is abbreviate | omitted as what employ | adopts a well-known system selectively.

  The motor 3 is a rotary electric motor that rotationally drives the shaft 2. The motor 3 in the emulsification apparatus according to the embodiment is an induction motor (three-phase AC induction motor) and is suitable for an emulsification process having a relatively large torque fluctuation. Inverter control can be performed to control the rotation speed. For example, the motor 3 may be replaced with another type of electric motor such as a brushless DC motor (non-commutator DC electric motor) capable of rotating at a certain high speed suitable for rotating the shaft 2 by direct drive (direct drive). it can.

  The motor 3 rotates the shaft 2 via an endless V-belt 4 that connects a pulley provided on the drive shaft and a pulley provided on the shaft 2. The motor 3 is driven at a rotational speed of about 3000 rpm / min to 5000 rpm / min. For example, when the blade length of the first rotary blade 7 is 300 mm, the peripheral speed at the blade tip of the first rotary blade 7 is 30 m. A sufficient required rotational speed ω required for the emulsification process of about / sec to 50 m / sec can be obtained. The required rotational speed range or rotational speed range is a relatively high speed range in the impeller stirrer. However, it is a safe low rotational speed that does not cause damage to the impeller as compared with the rotational speed of the rotating body in another type of stirrer that rotates the rotating body at 6000 rpm / min to 10,000 rpm / min or more.

  The boss 5 is attached and fixed to the tip of the shaft 2 that protrudes into the tank of the processing tank 1 and is inserted. The boss 5 is accommodated in the tank of the processing tank 1. A first rotating blade 7 and a rotating disk 6 are attached to the boss 5. The boss 5 has a sufficient size that can fix the necessary size and number of the plurality of rod blades 71 in the first rotary blade 7 in the same shape. Since the boss 5 is provided as a reinforcing member capable of attaching and supporting the first rotary blade 7, the boss 5 can be regarded as the shaft 2 including the boss 5.

  The turntable 6 is attached to the shaft 2 so as to be rotatable coaxially with the central axis 21 of the shaft 2. As shown in FIG. 2, the rotating disk 6 in the emulsifying device according to the embodiment has a through hole having an inner diameter almost the same as the outer diameter of the boss 5 at the center of the disk surface. It is inserted and fixed integrally to the boss 5. The turntable 6 is disposed above the first rotary blade 7. The turntable 6 is formed in a reverse tapered shape having a lower surface area that is smaller than the upper surface as a whole. A plurality of vertical teeth 81 are formed on the circumferential surface 61 of the reverse taper of the rotating disk 6.

  The first rotary blade 7 is composed of a plurality of rod blades 71 fixed to the boss 5 attached to the shaft 2. As specifically shown in FIG. 2, the rod wing 71 has a shape similar to a paddle shape in the form of a rectangular thin plate, but the blade thickness is thicker and the blade width is narrower than the paddle shape. The shape equivalent to the radial fin shape of an aspect is shown. The radial fin shape is such that when the shaft 2 rotates at a required rotational speed (number of rotations) ω and the tip of the rod blade 71 reaches a predetermined peripheral speed, the first rotary blade 7 and the fixed blade 9 A strong transverse vortex 10 is caused around the axis parallel to the central axis 21 of the shaft 2 which is the rotation axis of the first rotary blade 7 at the blade tip of the rod blade 71 in the clearance formed therebetween.

  Tip vortex cavitation generated at the impeller blade tip (blade tip vortex cavitation) differs depending on the airfoil and the situation where cavitation occurs. In the emulsifying device of the embodiment, the first rotating blade 7 has the shape of the radial fin-shaped rod blade 71 and the fixed blade 9 is provided, so that the transverse vortex 10 is formed at a relatively low peripheral speed. Therefore, the rotation speed of the first rotary blade 7 is set as low as possible. Therefore, the horizontal vortex 10 is continuously formed one after another, but the pressure at the center of the horizontal vortex 10 is suppressed to a state immediately before the occurrence of cavitation, and a large amount of bubbles are not formed. Occurrence has been reduced.

  The transverse vortex 10 that is generated one after another at the tip of the radial fin-shaped rod wing 71 develops into a twisted ribbon-like longitudinal vortex that is sometimes generated in a plurality of times, and contacts, collides, and diffuses the material to be treated with a strong force. . For this reason, the first rotary vane 7 composed of the radial fin-shaped rod blades 71 provided in the same shape to disperse that can easily generate the transverse vortex 10 rotates the impeller at a lower rotational speed than the conventional stirrer and has sufficient shear. Power and dispersion force can be obtained, and the material to be treated is finely and uniformly divided more efficiently in a short time, and effectively and uniformly dispersed.

  The plurality of rod blades 71 are disposed in the boss 5 so as to diffuse. Arranging in a divergent shape means that the adjacent blades 71 on the horizontal plane are attached so as to spread radially in three or more directions at the same interval. In the first rotary blade 7 in the emulsifying device of the embodiment, the rod blades 71 are provided in the same shape so that the angle between the adjacent rod blades 71 is 60 degrees. By providing the rod blades 71 in a divergent shape, a balance is maintained when the first rotary blade 7 rotates at the required rotational speed ω. In addition, the transverse vortex 10 that assists atomization and uniform dispersion is effectively generated at the tip of the plurality of rod blades 71 arranged in the same shape, and the emulsification processing time is shortened, and the quality of the emulsified product is improved. .

  The plurality of rod blades 71 are arranged in multiple stages parallel to the vertical direction. In the first rotary blade 7 in the embodiment, the rod blades 71 are provided in three stages parallel to the vertical direction, and the distance between the upper and lower portions of the rod blades 71 in each stage is about 10 mm. By providing the rod blades 71 in multiple stages, the material to be treated is sufficiently diffused when the first rotating blade 7 rotates at the required rotational speed ω, and a difference in flow velocity is created between the rod blades 71 to produce the rod blades 71. The horizontal vortex 10 is easily generated evenly in the height direction of the treatment tank 1 at the blade tip. And the emulsification processing time is shortened by the large number of horizontal vortices 10, and the quality of the emulsified product is improved.

  As shown in FIG. 4, the plurality of rod blades 71 are disposed downward with a predetermined angle θ. In the first rotary blade 7 in the embodiment, all the rod blades 71 are disposed downward about 20 degrees with the horizontal as 0 degrees. By providing the rod blades 71 downward at a predetermined angle θ, as shown in FIG. 4, the swirl flow in which the treatment liquid descends along the inner wall 11 of the treatment tank 1 in the horizontal plane around the central axis 21 of the shaft 2. 20 is formed, and the processing liquid is pushed up from the bottom surface of the processing tank 1 along the central axis 21 to generate an upward flow, thereby sufficiently creating a vertical convection 30. As a result, the first rotating blade 7 rotates at a required rotational speed ω that is sufficiently slower than other types of stirrers, so that the processing liquid is sufficiently stirred and the material to be processed diffuses efficiently.

  The second rotary blade 8 is composed of a plurality of gear-shaped vertical teeth 81 provided on a reversely tapered peripheral surface 61 of the rotating disk 6 that rotates coaxially with the central axis 21 of the shaft 2. The turntable 6 closes the flow path of the processing liquid rising along the central axis 21 of the shaft 2 and pushes it toward the inner wall 11 side of the processing tank 1. The second rotary blade 8 rotating at a predetermined rotational speed ω forms a downward swirling flow 20 along the inner wall 11 of the processing tank 1 by the action of the reverse tapered peripheral surface 61 and the rotating vertical teeth 81. Therefore, the second rotary blade 8 helps the action of the first rotary blade 7 to make the stirring flow more active and promote uniform dispersion.

  The fixed blade 9 is provided on the inner wall 11 of the processing tank 1. The fixed blade 9 is composed of a plurality of vertical stripes 91, and the vertical stripes 91 are arranged along the inner wall 11 of the treatment tank 1 at equal intervals. The vertical strip 91 has at least a height from the bottom surface of the processing tank 1 to the rotating disk 6. The fixed blade 9 partially blocks the swirling flow 20 so that the first rotating blade 7 is in a clearance formed by the inner wall 11 of the processing tank 1 and the first rotating blade 7 between adjacent vertical strips 91. The generation of the lateral vortex 10 at the blade tip of the rod wing 71 is promoted and developed. Therefore, the fixed blade 9 applies a stronger stirring force in the clearance formed between the first rotating blade 7 and actively contacts, collides, and diffuses the material to be processed, thereby more efficiently processing the material. The material is finely divided and dispersed.

  30 liters of processing liquid mixed with 2000 g of soybean powder ground and milled to about φ0.1 mm by the emulsifying device of the embodiment is sealed in the processing tank 1 and the shaft 2 is rotated at 3000 rpm / min and stirred. As a result, high-quality soy milk acceptable in about 1 minute was produced. In a homomixer that is currently generally used, it is required to rotate the impeller or rotor at a high speed of at least 6000 rpm / min in order to produce equivalent soy milk in approximately the same time. Can be emulsified in a sufficiently short time at a relatively low speed of about 3000 rpm / min to 5000 rpm / min.

  As described above, the emulsifying device according to the embodiment has the first rotating blade 7 and the second rotating blade in addition to the individual actions due to the unique structure of the first rotating blade 7 and the second rotating blade. Due to the synergistic effect provided by the provision of the blades 8 and the fixed blades 9, it is possible to effectively emulsify even if the rotational speed of the rotary blades is as low as possible. Ease of maintenance and management, noise and vibration are reduced, and there is no fatal contamination that affects the product safety. can do.

  Tip vortex cavitation occurs when the pressure at the center of the strong transverse vortex generated at the tip of the rod wing drops below the vapor pressure. When bubbles formed by cavitation do not disappear sufficiently and remain in the treatment liquid, the quality of the resulting emulsified product may be deteriorated. Further, noise may be generated when the bubbles are crushed and disappear, and the impeller may be eroded by a high-pressure impact when the bubbles are crushed.

  The emulsifying device of the embodiment is effective for forming the transverse vortex 10, the swirl flow 20, and the convection 30 by reducing the rotation speeds of the first rotating blade 7 and the second rotating blade 8 as much as possible. The generation of bubbles due to cavitation is suppressed while forming the horizontal vortex 10, the swirl flow 20, and the convection 30, and the bubbles are less likely to remain in the emulsion or suspension. Further, since the first rotary blade 7 is composed of the radial fin-shaped rod blades 71 and the impeller blade thickness is thick and the blade width is narrow and strong, there is almost no possibility of damage to the impeller due to cavitation. Therefore, it is still advantageous even if there is no means for specifically suppressing the generation of bubbles. However, as described above, the generation of bubbles can be further reduced by using a vacuum milk apparatus that evacuates the processing tank 1.

  Several examples of the emulsifying device of the embodiment described above have already been given, but modifications and applications are possible without departing from the technical idea of the present invention. The prior art as a whole with respect to the rotational speed or rotational speed of the first rotating blade, the specific shape of the rod blade in the first rotating blade, the predetermined angle at which the rod blade is attached, or the distance between the upper and lower sides of the rod blade On the other hand, the present invention is not limited to the specific shapes or numerical values presented in the description of the embodiments as long as the effects of the present invention are sufficiently obtained.

  The emulsifying device of the present invention is used in the manufacture or test research of emulsified products in a wide range of fields such as foods, cosmetics, pharmaceuticals, and chemicals. The emulsification apparatus of the present invention shortens the emulsification treatment time, helps improve the quality of the emulsified product, realizes a low cost of the product, and contributes to the development of fields such as foods, cosmetics, pharmaceuticals, and chemicals.

DESCRIPTION OF SYMBOLS 1 Processing tank 11 Inner wall 12 Top cover 2 Shaft 21 Rotating shaft 3 Motor 4 V belt 5 Boss 6 Turntable 61 Circumferential surface 7 First rotating blade 71 Bar blade 8 Second rotating blade 81 Vertical tooth 9 Fixed blade 91 Vertical strip 10 Transverse vortex 20 Swirl 30 Convection

Claims (1)

  A treatment tank containing a treatment liquid containing a material to be treated, a rotatable shaft inserted into the treatment tank, and a plurality of fixed shapes downwardly at a predetermined angle in a multistage manner in the shape of the shaft. Formed on the peripheral surface of the rotating disk, a first rotating blade formed of a rod blade, a rotating disk that is coaxially rotatable on the shaft on the upper side of the first rotating blade and has a reverse tapered circumferential surface An emulsifying apparatus comprising: a second rotary blade made of a plurality of vertical teeth, and a fixed blade made of a plurality of vertical stripes formed at equal intervals on the inner wall of the treatment tank.

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