JPH08112519A - Device for mixing powder into liquid - Google Patents

Abstract

PURPOSE: To sufficiently mix and agitate powder and liquid without damaging physical properties of powder by installing a bending part in a transport flow passage of an air-powder mixture and making liquid jetting from a liquid feeding pipe intersect powder whose flow passage is changed at the bending part. CONSTITUTION: A bending pipe 22 for changing a transport flow passage of an air-powder mixture delivered from a powder feeding pipe 12 is installed in a mixing pipe 16. Further, a liquid feeding pipe 14 is arranged so that liquid jetted from the liquid feeding pipe 14 may intersect powder whose transport flow passage is changed at the bending part 22. In this way, powder and liquid are sufficiently mixed by the diffusion of powder and the intersection of the flow passages of powder and liquid, and further excellently mixed by the occurrence of turbulence due to the second intersection to prevent the formation of aggregate.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention can be easily incorporated in-line into a production line, and powder and liquid can be mixed well and charged into a stirring tank or the like without scattering the powder. The present invention relates to a mixing device for powder into liquid.

[0002]

2. Description of the Related Art In the manufacture of various cosmetics, foods, etc., there are many cases in which a powder and liquid mixing step of dispersing or dissolving the powder in a liquid is included. In a normal manufacturing facility, such powder and liquid are mixed by pneumatic transportation of the powder and liquid feeding means such as a pump for the liquid.
Each is separately charged into a mixing tank, and both are stirred and mixed in the mixing tank.

Therefore, not only the powder is scattered before mixing and adheres to an unnecessary portion and the equipment is soiled, but usually the powder is charged into the mixing tank after the measurement, so that the powder is scattered into the air. This causes an error in the charged amount of powder. In addition, since both are separately charged, it takes time to mix, and further powder agglomerates (so-called lumps) are likely to occur, and reliable and good mixing cannot be performed,
There is a problem that it takes time to mix and dissolve.

In order to solve such a problem, a mixing device (powder liquid mixing device) for mixing various powders into a liquid has been developed and sold. For example, the device shown in FIG. 4 is a powder-liquid mixing device having a double pipe structure of a powder supply pipe 50 and a liquid supply pipe 52, (a) is a top view, and (b) is a front sectional view. Are shown respectively.

In this apparatus, the powder is free-falling or pneumatically transported, as shown by an arrow a, in the powder supply pipe 5.
0 and discharged from the lower end of the powder supply pipe 50. On the other hand, the liquid is introduced into the inlet port 54 as shown by the arrow b.
The liquid is then jetted to the liquid supply pipe 52. Here, as shown in FIG. 4, since the introduction port 54 is arranged off the center of the liquid supply pipe 52 having a circular cross section, the liquid swirls in the liquid supply pipe 52 and advances downward, Powder powder supply pipe 50
The powder and the liquid are mixed by being sprayed in the form of a conical thin film through a gap between the liquid supply pipe 52 and the liquid supply pipe 52.

However, this device is mainly intended to prevent the scattering of powder, and in the portion where the liquid film is formed, the thin film prevents the powder discharged from the powder supply pipe 50 from scattering. However, it is impossible to prevent the generation of powder agglomerates, and the powder and liquid cannot be mixed well. In addition, the effect of preventing the scattering of powder,
It is only the part where the liquid thin film is formed and is not perfect.

Further, the apparatus shown in FIG.
This is an apparatus for mixing powder liquid while preventing the powder from scattering by introducing the powder from the bottom of the. That is, in this apparatus, the liquid is previously charged in the mixing tank 56, and the powder is charged into the mixing tank 56 from the bottom by the high-concentration air transportation device 62 including the compressor 58 and the powder storage tank 60. Mix powder and liquid. According to this apparatus, it is possible to satisfactorily prevent the powder from scattering, but for powder-liquid mixing, most of the functions (capacity) thereof are the mixing apparatus 56a such as an agitator installed in the mixing tank 56. Powder, which cannot be sufficiently dispersed and mixed by the mixing device 56a at the moment when it is supplied into the liquid or in an extremely short time, cannot be well mixed and cannot be used.

The apparatus shown in FIG. 6 is an apparatus for mixing powder and liquid by a so-called jet jet. In this device, the powder is filled in a hopper 66 fixed to the mixer 64. On the other hand, the liquid is stored in the surge tank 68, and its flow rate is measured by the integrated flow meter 72, and is injected into the mixer 64 at high pressure and high speed by the pressurizing pump 70. By the jet jet of the liquid, the powder filled in the hopper 66 is sucked into the mixer 64,
And due to the strong turbulent flow of liquid, powder and liquid are mixed,
Ejected as indicated by the arrow.

Further, in the apparatus shown in FIG. 7, the powder transported from the powder feeder is sprayed from a powder supply pipe 72 whose diameter is gradually expanded downward to form a powder shower film 74, and a liquid shower film 74 is formed. Is sprayed from the same liquid supply pipe 76 to form a liquid shower film 78, and the two are mixed in a shower film state by an inflow apron 80 to mix them, and a homomixer stator 83 powered by a motor 82, for crushing By the stator 84 and the grinding stator 86,
The liquid and the powder are further mixed, the particle size of the powder is adjusted, and the mixture is supplied to the next step through the discharge port 88.

According to the apparatus shown in FIGS. 6 and 7, the powder and the liquid can be mixed well without the powder scattering. However, these devices are large-scale devices that require special high-pressure pumps, motors, etc., and cannot be easily incorporated in the production line.
There is a problem that the cost is high. Further, since the device shown in FIG. 6 is a device that simply mixes powder and liquid with a linear jet flow by using a so-called ejector, a good mixing efficiency can be obtained in comparison with the device scale and cost. It may not be possible. Further, in the apparatus shown in FIG. 7, it is necessary to apply a high mechanical shearing force to the powder-liquid mixture in order to disperse the powder in the liquid, so that the molecular composition of the powder is cut and the physical properties are adversely affected. May be given.

[0011]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, which does not scatter the powder and does not impair the physical properties of the powder. And liquid can be mixed well (dispersed or dissolved) and supplied to the next step such as a stirring tank, and the mechanism is simple and low-cost, and can be easily incorporated into existing production lines. It is to provide a mixing device into a liquid.

[0012]

In order to achieve the above object, the present invention provides a powder supply pipe for delivering powder by pneumatic transportation, a liquid supply pipe for ejecting liquid, the powder supply pipe, and The liquid supply pipe has a cylindrical mixing pipe inserted into the same open end, and the mixing pipe bends so as to change the transport flow path of the air-powder mixture ejected from the tip of the powder supply pipe. The liquid supply pipe is arranged such that the liquid ejected from the liquid supply pipe and the powder whose flow path is changed at the bent portion intersect each other. A mixing device for a liquid is provided.

Further, in the mixing apparatus for mixing the powder into the liquid, it is preferable that a baffle plate that obstructs the flow of the powder and the fluid is arranged further downstream of the bent portion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A powder mixing apparatus for liquids of the present invention (hereinafter referred to as powder mixing apparatus) will be described in detail below with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 shows a schematic view of an example of the powder liquid mixing apparatus of the present invention. The powder liquid mixing device 10 of the present invention is basically
A powder supply pipe 12 for supplying powder by pneumatic transportation, a liquid supply pipe 14 for supplying liquid, and a cylindrical mixing pipe 16 for mixing powder and liquid.

The powder supply pipe 12 and the liquid supply pipe 14 are
The mixing tube 16 is inserted and arranged at the same open end. In the illustrated example, the powder supply pipe 12 and the liquid supply pipe 14
Are both fixed to a flange 18 that closes the open end of the upstream side (the upstream side in the flow direction of the powder and liquid) of the mixing pipe 16, and the flange 18 is attached and fixed to the mixing pipe 16 by a fixing member 20. As a result, the powder supply pipe 12 and the liquid supply pipe 14 are inserted and fixed in the same open end of the mixing pipe 16.

In the powder-liquid mixing apparatus 10 of the present invention, the method of arranging and fixing the powder supply pipe 12 and the liquid supply pipe 14 is not limited to the illustrated example, and a known fixing method used for ordinary piping equipment. Are all available.

Further, in the powder-liquid mixing apparatus 10 of the present invention, the powder is supplied from the powder supply pipe 12 by using pneumatic transportation, and various pneumatic transportation apparatuses which can secure necessary flow rate and flow velocity are used. It is possible. Further, the liquid supply pipe 14
There is also no particular limitation on the method of supplying liquid from the above, and any of various known liquid feeding means can be used as long as it can secure the necessary flow rate and flow velocity, such as a method using a pump or a method using a head. is there. Although the shape of the liquid supply pipe 14 is not particularly limited, it is in the same direction as the transportation path of the air-powder mixture changed by the bent portion 22 described later (up and down direction in FIG. 1).
Has a flat shape and gradually expands in a direction orthogonal to the transportation path (a direction perpendicular to the paper surface of FIG. 1), and the ejected liquid spreads in a fan shape and surely intersects the air-powder mixture. It is preferable to have a structure.

In the powder liquid mixing apparatus 10 of the present invention, the mixing pipe 16 is a bent portion for changing the transportation flow path of the air-powder mixture (hereinafter referred to as powder) sent from the powder supply pipe 12. The liquid supply pipe 14 is arranged so that the liquid having the nozzle 22 and further ejected from the liquid supply pipe 14 intersects with the powder whose transport flow path is changed by the bent portion 22.

That is, as shown by the arrow a in FIG. 1, the powder that has been pneumatically transported and sent out from the powder supply pipe 12 initially rides on the air flow and advances linearly, but at the bent portion 22. Then, it collides with the inner wall of the mixing pipe 16, is diffused and the flow path is changed, and advances in the downstream direction along the shape of the bent portion 22. On the other hand, the liquid supply pipe 14 jets the liquid so as to block the flow path of the powder by the bent portion 22, as shown by the arrow b. That is, in the liquid supply pipe 14, the linearly ejected liquid is a powder flow path changing start portion (bending portion 22).
Is arranged so that the powder and the liquid ejected from the powder supply pipe 12 and the liquid supply pipe 14 intersect with the liquid.

With such a structure, the powder and the liquid are well mixed by the diffusion of the powder and the intersection of the transport passages of the powder and the liquid, and the turbulent flow is generated by the intersection of the two. As a result, it is possible to satisfactorily stir the mixture, and to prevent lumps and the like from mixing the powder and the liquid satisfactorily and reliably. Further, the powder is directly supplied to the mixing pipe 16 without being discharged to the outside from the powder supply pipe 12, is immediately mixed with the liquid, and is jetted in a good mixed state, so that the powder may be scattered. Instead, it is possible to mix the powder and liquid with an accurate mixing ratio by adjusting the flow rate of both powder and liquid according to the mixing amount (mixing ratio) of both powder and supplying from both supply pipes. Is. Moreover, since the powder supply pipe 12 and the liquid supply pipe 14 are simply inserted and fixed to the mixing pipe 16 having the bent portion 22, the cost is low.
Moreover, it can be easily incorporated inline into an existing production line.

The shape of the bent portion 22 and the liquid supply pipe 14
The ejection direction of the liquid from is not particularly limited as long as the flow paths of the liquid and the powder intersect, and may be appropriately determined depending on the production line, the flow rate of the powder and the liquid, and the like. here,
In order to reliably mix the powder and the liquid, most of the powder particles collide with the inner wall of the mixing tube 16 at the bent portion 22 and are formed so that the bent portion 22 is sufficiently diffused.
Alternatively (further), it is preferable to adjust the powder ejection direction from the powder supply pipe 12.

In the powder liquid mixing apparatus 10 of the illustrated example, baffle plates 24 and 26 for obstructing the flow of the powder fluid mixture are arranged downstream of the bent portion 22 of the mixing pipe 16. As shown in FIGS. 1 and 2, the baffles 24 and 26 have an arcuate shape and are arranged in the mixing pipe 16 so as to be inclined in the flow direction of the powder-fluid mixture and to obstruct the flow. It By having such baffles 24 and 26, a turbulent flow is generated in the flow of the powder-fluid mixture at this portion, and the powder and the fluid can be mixed better.

The shape and size of the baffle plate and the number of arrangements are not particularly limited, and various shapes and sizes that disturb the flow of the powder fluid mixture and generate turbulent flow can be used. The number is not limited to two in the illustrated example, and one or three or more baffle plates may be provided.

However, if the two baffle plates both exceed the center line of the mixing tube 16 or if the angle of the baffle plates is too large, for example, if the flow obstructing effect of the baffle plates is too great, the powder fluid Since the flow of the mixture may not be smooth and back pressure may occur, it is preferable to set an appropriate size and shape in accordance with the flow velocity of the powder fluid mixture. In this respect, the inclination angles of the baffles 24 and 26 are preferably about 30 ° in the downstream direction. On the contrary to FIG. 2, if the baffle plate is arranged so as to be inclined in the direction opposite to the flow of the powder fluid mixture, a dead space is likely to occur at the contact portion between the baffle plate and the inner wall of the mixing pipe. Not preferable.

The powder liquid mixing apparatus 10 of the present invention as described above is
It may be installed by itself so as to flow the powder-liquid mixture into a vat or a storage tank. In order to further improve the mixing state of the powder-liquid mixture, as shown in FIG. Three
0 and the like, and the powder liquid mixture mixed by the powder liquid mixing device 10 of the present invention may be further stirred in the mixing tank 30.

Although the powder mixing apparatus for liquids according to the present invention has been described in detail above, the present invention is not limited to the above-mentioned embodiments, and various changes and improvements are made without departing from the scope of the present invention. Of course you may go.

[0028]

As described in detail above, according to the powder mixing apparatus of the present invention, the powder is not scattered and the physical properties of the powder are not affected. Powder and liquid can be mixed well (dispersed or dissolved) and supplied to the next step such as a stirring tank, the mechanism is simple and low cost, and it can be easily incorporated into the existing production line. It can be suitably used for various purposes.

[Brief description of drawings]

FIG. 1 is a schematic view of an example of a mixing device (powder liquid mixing device) for mixing powder into liquid according to the present invention.

FIG. 2 is a partial schematic cross-sectional view of a device for mixing powder into liquid shown in FIG.

FIG. 3 is a view conceptually showing an example of use of the mixing apparatus for mixing the powder shown in FIG. 1 into a liquid.

FIG. 4 is a schematic view of an example of a conventional powder-liquid mixing device,
(A) is a top view, (b) shows a front view cross section, respectively.

FIG. 5 is a schematic view of an example of a conventional powder liquid mixing device.

FIG. 6 is a schematic view of an example of a conventional powder liquid mixing device.

FIG. 7 is a schematic view of an example of a conventional powder liquid mixing device.

[Explanation of symbols]

 10 Mixing device for powder into liquid (powder-liquid mixing device) 12, 50, 72 Powder supply pipe 14, 52, 76 Liquid supply pipe 16 Mixing pipe 18 Flange 20 Fixing member 22 Bending portion 24, 26 Baffle plate 30 , 56 Mixing tank 54 Inlet port 58 Compressor 60 Powder storage tank 62 High-concentration air transportation device 64 Mixer 66 Hopper 68 Surge tank 70 Pressurizing pump 72 Integrated flow meter 74 Powder shower film 78 Liquid shower film 80 Inflow apron 82 Motor 83 Homomixer stator 84 Crushing stator 86 Grinding stator 88 Discharge port

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Hosaka 18-4 Nihombashi Koamicho, Chuo-ku, Tokyo Nisshin Engineering Co., Ltd. (72) Inventor Takeyuki Miyashita Nihombashi Koami, Chuo-ku, Tokyo Town No. 18-4 Nisshin Engineering Co., Ltd. (72) Inventor Shigeki Masu 5 Kiyohisacho, Kuki-shi, Saitama Prefecture Shiseido Dokuki Factory (72) Inventor Kazuhiro Nomura Kiyohisa-cho, Kuki-shi, Saitama Prefecture No. 5 Shiseido Dokuki Factory (72) Inventor Shigeo Saito 5 Kiyohisacho, Kuki City, Saitama Prefecture Shiseido Dokuki Factory

Claims (2)

[Claims] 1. A powder supply pipe for delivering powder by pneumatic transportation,
A liquid supply pipe for ejecting liquid, and a cylindrical mixing pipe in which the powder supply pipe and the liquid supply pipe are inserted at the same open end, and the mixing pipe is ejected from the tip of the powder supply pipe The air-powder mixture has a bent portion for changing the flow path,
Further, the liquid supply pipe is arranged so that the liquid ejected from the liquid supply pipe and the powder whose flow path is changed at the bent portion intersect with each other. apparatus. 2. A powder liquid mixing apparatus according to claim 1, further comprising a baffle plate which is disposed downstream of the bent portion and which obstructs the flow of the powder and the fluid. Mixing device into.