JPS6148973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dissolving machine for powder and granular materials, and particularly to a dissolving machine for protein powder such as egg white powder, which belongs to the food industry.

In recent years, liquid proteins such as egg whites have been turned into powder,
It is a common practice to store this powdered material and later dissolve it in water again as needed to return it to its original state before using it for food processing. However, the physical properties of these powdered proteins are not uniform, and even when they are redissolved, there are a wide range of proteins from poorly soluble to easily soluble. Various melting machines have been proposed for melting.
(Japanese Patent Application Laid-open No. 48-40054). However, all conventional melting machines supply raw water in the form of an annular membrane, so if more than a predetermined amount of powder or granules is supplied, the water membrane may break, or an unbroken annular membrane may not be maintained. However, it has been difficult to prepare highly concentrated liquid proteins because of the need to supply more than a predetermined amount of water. In addition, highly hygroscopic powder and granules have the disadvantage that the powder and granules adhere to and stack on the inlet, clogging the inlet.

The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a dissolving machine that can easily produce products with a wide range of solute concentrations, and is particularly suitable for producing products with high concentrations. The purpose is to

In order to achieve the above object, the present invention opens a solvent supply pipe in the center of the supply opening formed in the upper lid of the stirring chamber, and surrounds this to form a supply passage for powder and granular material, thereby supplying the above-mentioned supply. Immediately below the opening, a stirring disk that receives the supplied solvent and powder is rotatably supported in the horizontal direction, and a plurality of stirring blades are attached to this stirring disk through a narrow gap between it and the upper lid. are erected in a radial manner, and a concentric protrusion is provided on the upper surface of the disk, and the stirring blade extends outward at a radial angle with a starting end located approximately directly below the periphery of the supply opening; It is also characterized in that its extending end is set at a length position that intersects the radial line passing through the starting end of the adjacent stirring blade.

The present invention will be explained below based on illustrated embodiments.
FIG. 1 shows a cross section of the main part of the apparatus of this embodiment. As shown in the figure, this apparatus has a supply section 1 for powder and granular material and raw water, and an agitated mixture 2 for receiving and stirring these raw materials. The stirring and mixing part 2 and the discharge part 3 are housed in the same cylindrical part and placed on a base B.

Therefore, the supply section 1, a hopper H that supplies powder and granules, a vibrator V that applies vibration to this hopper H to smooth the supply of powder and granules, and a hopper H that tilts from the outlet of the hopper H to the raw material receiving section of the melting machine. a chute 11 for supplying the powder and granular material constructed by
It consists of a funnel 12 that receives raw materials from the tank and supplies the raw materials to the stirring/mixing section 2 described later, and a water supply pipe 13 that supplies raw water.

As shown in FIGS. 1a and 1c, the chute 11 has a side wall 11a at its peripheral edge, and a funnel 12 at its tip.
A feed hole 11b having approximately the same diameter as the straight body portion 12a of the feed hole 12a is bored, and the slope becomes steeper as the chute portion approaches the feed hole 11b, so that the powder and granules are dispersed as evenly as possible over the entire circumference of the feed hole 11b. The water flows down into a funnel 12 in an annular manner. Further, the water supply pipe 13 inserted and supported through the center of the supply hole 11b includes a bent resin hose 13a and a pipe 13b covering the tip thereof, and this double pipe structure allows water to reach the surface of the pipe 13b. It is possible to prevent dew condensation and to suppress adhesion and stacking of powder and granules as much as possible.
The funnel 12 for receiving the granular material has a straight body portion 1 approximately equal in diameter to the supply hole 11b of the chute.
2a and an expanded portion 12b that expands above this straight body portion, and this straight body portion 12a is connected to the upper lid 2 of the stirring and mixing section 2.
1 is fitted and connected to a cylindrical portion 21a formed at the center.

The upper lid 21 is made of a large-diameter flat cylindrical member having the cylindrical portion 21a in the center, and has a protruding stepped portion 21b along the circumference formed on the side wall of the upper lid 21. The part 31 is tightly fitted. Immediately below the upper lid 21, a stirring disk 22 with a slightly smaller diameter is arranged in parallel, and a rotating shaft 25 is connected to the center back surface of the stirring disk 22 via a connecting pin 24. The disk 22 can be rotationally driven by a drive source (not shown). Further, two concentric protrusions 22a are formed on the upper surface of this disk 22, and a bent portion 22b is formed by bending the outer peripheral edge toward the upper lid 21 side. The stirring blades 23 are arranged radially upright, and the radial direction is maintained at a predetermined angle α, which will be described later, with the radial direction (see FIG. 1b). Note that 32 is an inclined bottom plate forming the bottom of the discharge section 3, 33 is a discharge port provided at the lower end thereof, and 31a is a shaft cover raised from the bottom plate 32 to cover the rotating shaft 25. be.

Next, the stirring and mixing action of the powder and granular material brought about by the stirring blade 23 will be described in detail.

(1) Regarding the mounting angle (α) When the mounting angle (α) is rotated in the direction of the arrow shown in the figure, a suitable value is within the range of 60°≦α≦80°. According to experiments, especially when the angle is around 70°, the powder does not adhere to the base of the stirring blade 22, which is suitable for mixing the powder and water. If this angle becomes large, such as 75 degrees or 80 degrees, powder particles will adhere to the blades 22, resulting in a loss of rotational energy.

(2) About the shape of the stirring blades (a) Effect of starting point diameter The starting point diameter D here refers to the shape of the 8 stirring blades 22
This is the diameter when the starting points S of the funnel are connected in the same circle, and this starting point diameter D is
It has been found that when the stirring blades 22 are processed to have approximately the same diameter as the outer diameter, the stirring and mixing action of the raw water droplets and the powder and granules can be sufficiently performed. If this starting point diameter D takes a large distance from the straight body part 12a and forms a large space on the lower surface of the upper lid 21, a phenomenon will occur in which particles and water droplets will be caught in the lower surface of the upper lid 21. Particularly, the powder particles adhered and stacked near the connecting portion of the straight body portion 12a, which adversely affected the stirring and mixing of the powder particles.

(B) Influence of the height of stirring blades In the stirring chamber formed by the upper lid 21 and the disc 22, a plurality of stirring blades 23 are erected with a slight gap ((l)) between the lower surface of the upper lid 21.
The height h of the stirring blade 23 can be adjusted as appropriate by vertically adjusting the attachment position of the disk 22 to the rotating shaft 25. For example, in a melting machine with a stirring chamber outer diameter of about 185 mm, the blade height h
As a result of conducting experiments on products with heights of 4 mm, 7 mm, 8 mm, and 12 mm, we were able to obtain the highest yield and most homogeneous product with the 7 mm height. Note that at this time, the gap (M) is maintained at about 2 mm. It is understood that by reducing the stirring chamber capacity by reducing the blade height h in this way, it is possible to increase the stirring efficiency for the same circumferential speed, and as mentioned above, a high yield and homogeneous solution can be obtained. be done. However, when the blade height h is set to 4 mm, the feed rate of raw water and powder is restricted, and if the feed rate is maintained at 7 mm, the amount of supply becomes excessive, and the mixing action of raw water and powder becomes difficult. It won't be enough. In addition, it goes without saying that these results require that the circumferential speed be increased or decreased depending on the type of powder or granular material (pectin, egg white, etc.).

(c) Effect of stirring blade length As shown in FIG. 1b, the stirring blade 23 intersects with the extension line e of the connection connecting the starting point S of another adjacent stirring blade 23 and the center of the disk 22. (see Figure 1b). By making the length like this, that is, by increasing the length of the scooping and stirring by the blades, the disk 22
By reliably mixing the raw materials that diffuse from the center, it is possible to obtain a homogeneous product with an even concentration. This is because, on the disk 22, the powder and granules that are uniformly distributed surrounding the raw material water that has flowed down will ride on the raw material water with a large specific gravity and try to travel straight outward radially due to the centrifugal force. On the other hand, since the stirring blades 23 that are inclined with respect to the radial direction have the set length as described above, the straight flow flows through the stirring blades 23.
This is because there is no risk of the powder escaping without touching the water, and it will definitely come into contact with the stirring blades 23 and be beaten, thereby ensuring a good mixing action between the raw material water and the powder. And during this mixing action,
The straight flow collides with the concentric protrusion 22a on the disk 22 and is blown upwards, causing a reversal action. This reversal flow acts synergistically with the impact action of the stirring blade 23 to further mix and dissolve. The width will be increased.

Next, the operation of the dissolving machine having the above configuration will be explained. The powder and granular material stored in the hopper H
From the outlet, the liquid flows through the chute 11 in the direction of arrow P in FIG. At this time, even if the granular material contains a large amount of moisture and is likely to form granular agglomerates, the vibrator V crushes the granular material and reliably supplies the granular material onto the chute 11. Furthermore, since the chute 11 has an evenly sloped surface centered around the supply hole 11b, the powder particles flowing down the chute 11 reach the periphery of the supply hole 11b in an evenly distributed manner. On the other hand, raw water flows down the water supply pipe 13 in the direction of arrow W to the center of the disk by a pump (not shown). At this time, the raw water is supplied to the supply hole 11b.
It is supplied onto the disk 22 in a state where it is surrounded by powder and granules that evenly flow down from the periphery. The raw water and powder that have reached the disk 22 are applied with the centrifugal force of the disk 22 rotating in the direction of arrow R, and are scattered around its outer periphery. At this time, in the space defined by the upper lid 21, the above-mentioned raw materials are stirred and mixed by the stirring blades 23 and the annular protrusion 22a installed upright on the disk 22 to form a homogeneous solution. That is, the granular material rides on the surface of the raw water flowing around the outer periphery of the disk 22,
In this state, it is mixed with the powder by the action of centrifugal force and stirring force. At this time, the powder is swollen and dissolved by water. Thereafter, this solution (swollen granular material) passes through the analysis part 22b of the disc by the exhaust action of the rotating disc, passes through the gap between the bent part 22b and the outer periphery of the upper lid 21 together with the exhaust flow, and is discharged. 3, and then adheres to the bottom plate 32, flows down, passes through the discharge port 33, and is stored in a product tank (not shown).

Further, FIG. 2 shows another embodiment, in which the only difference is the mounting state of the stirring blade 23', and the other structures are the same as those of the above embodiment. In this example, in order to cause a phenomenon in which more outside air is sucked,
The inner diameter of the funnel body 12a and the diameter of the starting point of the stirring blades 23 can be made closer to each other, thereby making it possible to improve the stirring efficiency compared to the above embodiment. Therefore, there is an advantage that a product with higher concentration can be obtained than in the above embodiment. However, because the suction force of the outside air is strong, there is a problem that a large amount of floating powder particles are discharged.

FIG. 3 shows a third embodiment, and as is clear from the figure, the device of this embodiment has a punching plate 26 ( b) is interposed between the outer peripheral edge of the disk 22' and the straight body of the upper lid 21'. That is, in this example, a steel material with small holes of 1.5 mm diameter drilled at 2 mm pitch throughout the plate is formed into a cylindrical shape, and this is fixed on the support member 27 and interposed between the above-mentioned members. It is something that

By providing the punching plate 26 in this manner, while the atomized mixture of water and powder passes through the small holes of this plate 26, the floating distance between the powder particles is forcibly shortened. Given the opportunity to collide, the granulation effect of the suspended solution is promoted, which has the effect of greatly suppressing the suspended solution particles being exhausted, and the powder and granules are This will promote the solubility of water in water.

In addition, depending on the physical properties of the powder or granular material, the chute supply hole 1
1b can be adjusted, and by adopting a screw-type powder supply means instead of the hopper H equipped with a vibrator, it can handle all kinds of powder and granules with different particle sizes. I can do it. Furthermore, it goes without saying that the apparatus of this embodiment can be widely applied to the food industry and other chemical industries in general.

As described above, according to the present invention, the solvent supply pipe is opened in the center of the supply opening formed in the upper lid of the stirring chamber, and a powder supply passage is formed surrounding this, and the supply Immediately below the opening, a stirring disk that receives the supplied solvent and powder is rotatably supported in the horizontal direction, and a plurality of stirring blades are attached to this stirring disk through a narrow gap between it and the upper lid. are erected radially, and a concentric protrusion is provided on the upper surface of the disc, and the stirring blade is inclined in the radial direction and extends outward with a starting end located approximately directly below the periphery of the supply opening. , and its extending end is set at a length that intersects with the starting end of the adjacent stirring blade on the radius line, so that the powder surrounds the solvent flowing down the center and is evenly stirred. It is diffused and distributed on the disk and tries to move straight in the radial direction by centrifugal force on top of this high specific gravity solvent, but at this time, the inclination to the radial direction and the set length of outward extension are The agitating blades ensure that the straight flow is captured without escaping to the outside and a good collision mixing effect is performed, and in addition, the collision deflection effect created by the protrusion on the disc and the straight flow With the addition of the There are benefits to be gained.

[Brief explanation of the drawing]

Fig. 1a is a partial cross-sectional view showing the main parts of an apparatus according to an embodiment of the present invention, Fig. 1b is a sectional view taken along line B-B in Fig. 1, and Fig. 1c shows the positional relationship between the chute and the water supply pipe. FIG. 2 is a schematic view of the left half similar to FIG. 1b showing the second embodiment of the present invention, and FIG.
FIG. 11...shoot, 12...funnel, 13...
Water supply pipe, 21... Upper lid, 22... Stirring disk, 2
2a... protrusion, 22b... bent portion, 23... stirring blade.

Claims (1)

[Scope of Claims] 1. A solvent feed pipe is opened in the center of a supply opening formed in the upper lid of the stirring chamber, and a powder supply passage is formed surrounding this, and directly below the supply opening. supports a stirring disk that can freely rotate in the horizontal direction for receiving the supplied solvent and powder, and a plurality of stirring blades are radially installed on this stirring disk through a narrow gap between it and the upper lid. At the same time, a concentric protrusion is provided on the upper surface of the disk, and the stirring blade extends outward at an angle in the radial direction with a starting end located almost directly below the periphery of the supply opening; is set at a length position that intersects with the radius line passing through the starting end of the adjacent stirring blade. 2. The supply passage is configured as a supply chute for powder and granular material with a supply hole opened at the bottom of the tip, and a solvent supply pipe extends through and hangs down from the center of the supply hole. Dissolving machine according to item 1. 3. The dissolving machine according to claim 1 or 2, wherein the outer peripheral edge of the stirring disk is bent upward. 4. The dissolving machine according to any one of claims 1 to 3, characterized in that a cylindrical punching plate is interposed between the inner periphery of the upper lid of the stirring chamber and the outer periphery of the disk.