JPH052390B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method and apparatus for dispersing granules, liquid, etc., for uniformly dispersing materials such as granules, liquid, etc. inside a cylindrical container. be.

[Prior art and its problems]

For example, in steel mills, coke is spread as a heat insulator on the top surface of hot metal received in a cylindrical hot metal ladle. This coke must be spread evenly so that a coke layer of a certain thickness is formed on the top of the hot metal, but in the past, this work was not mechanized and relied on manual labor. For this reason, not only was it difficult to uniformly spread the coke, but there were also problems in that the work efficiency was poor and the labor burden on the workers was large, and there were also problems in terms of safety and environmental hygiene.

By the way, as a device for filling a container with powder or granular material such as activated carbon, the outer periphery satisfies the following formula: r ² = r ₁ ² + θ/nπ (r ₂ ² − r ₁₂ ), where n=1, 2 r: Distance from the center of rotation of the dispersion to the outer peripheral edge at θ r ₁ : Radius of the protrusion at the center of rotation of the dispersion r ₂ : Maximum value of r determined by the inner diameter of the filling container θ: Center of rotation of the dispersion Using a tort-shaped or spiral-shaped dispersion with a rotation angle of r from It has been proposed that granules are supplied from a conduit to the center of rotation of the rotor and fall from the outer periphery of a heart-shaped or spiral shape (Japanese Patent Publication No. 45345/1983).

However, in the above proposed technology, the above r ₁ of the dispersion
Even if the powder is set to 0 (zero) so that the powder and granules theoretically fall uniformly from the center to the outer periphery, the conduit that supplies the powder and granules to the center of rotation of the dispersion will theoretically fall at one point. Unlike, since the inner diameter of the conduit has a certain real value, the powder and granular material supplied to the center of rotation of the dispersion body is supplied over a diameter approximately equal to the inner diameter of the conduit, and a part of it is supplied from the outer periphery to the center of rotation. The powder particles fall directly onto the surface to be spread without being caught by the dispersion material in the vicinity of r ₁ = 0, which has a V-shaped cut on the surface (w in Figure 5), and in reality, the powder particles are There is an inconvenience that it is not evenly distributed.

The present invention was made in view of the above circumstances, and it is possible to spread coke evenly and quickly over the hot metal in the hot metal ladle from the center to the entire outer periphery of the hot metal ladle. The purpose of the present invention is to provide a method and device for dispersing granules, liquids, etc. that can be widely applied to filling various materials such as ion exchange resins, uniformly distributing various liquid materials, charging powder and granules in silos, etc. .

[Means for solving problems]

In order to achieve the above object, the first means is to use a method of dispersing granules, liquids, etc., which uniformly disperses materials such as granules, liquids, etc., in which the shape of the outer periphery of the main part is centered in the plan view. The upper dispersion plate is formed in a spiral partial shape starting from the longest distance from the center and rotates approximately one time to reach the center. A lower scattering plate having a plan view shape extending from the end point of the spiral outer peripheral edge of the upper scattering plate to the center are rotated at the same speed in the same horizontal direction about the center at a constant speed. ,
The material is quantitatively dropped onto the center of the upper scattering plate, and in the main part of the upper scattering plate, the material is allowed to flow down from the spiral outer periphery of the upper scattering plate. At the outer periphery of the other part, the above-mentioned material was made to flow down from the outer periphery of the other part through the inner periphery of the lower dispersion plate to be dispersed.

A second means is to dispose a material supplying device that quantitatively drops the material in a granular material, liquid, etc. dispersion device that uniformly spreads the material, such as a granular material, liquid, etc. Below, the shape of the outer peripheral edge of the main part is formed into a spiral partial shape starting from the longest distance from the center in the plan view and reaching the center after approximately one rotation, and is dropped from the material supply device. The upper scattering plate receives the material on the center part and causes the material to flow down from the outer peripheral edge, and the inner circumferential edge has a plan view shape extending from the end point of the spiral outer peripheral edge of the upper scattering plate to the center. A lower scattering plate that receives the material flowing down from the outer peripheral edge of the upper scattering plate and makes it flow from the inner peripheral edge is provided, and these scattering plates are moved at the same speed with respect to the center of the upper scattering plate. The configuration includes a rotating means for rotating at a constant speed in the horizontal direction.

[Effect]

While rotating the upper scattering plate and the lower scattering plate at a constant speed in the same horizontal direction around the center of both scattering plates by means of a rotating means, the material is quantitatively deposited onto the center of the upper scattering plate. Feed falling. The material supplied above flows down from the spiral outer periphery of the main part of the upper scattering plate, and flows down from the outer periphery of the other part of the upper scattering plate to the inner periphery of the lower scattering plate. flowing down through the

Therefore, the material is evenly distributed over the entire surface from the center to the outer periphery.

〔Example〕

Hereinafter, a first embodiment of the apparatus of the present invention will be described with reference to FIGS. 1 to 6.

In the figure, numeral 1 is a cylindrical container such as a hot metal pot containing hot metal, and the top thereof is open. The spreading device according to the present invention uniformly spreads granular material A such as coke onto a circular spread surface 2 such as the upper surface of hot metal inside the container 1, and is designed to uniformly spread granular material A such as coke on a circular surface 2 to be spread, such as the upper surface of hot metal inside the container 1. It is fixedly installed on the floor 3 of the floor, and includes a material supply device 4 that quantitatively drops and supplies the granules A, and a rotating means 5 that rotates the granules in the horizontal direction while being supplied from the material supply device 4. It is mainly composed of a scattering plate 6 which receives the granular material A on its upper part, causes it to flow down from the outer peripheral edge, and scatters it onto the surface 2 to be spread.

The material supply device 4 has an inverted conical shape on the lower side, and is supported by a plurality of support columns 7a so that its center line is coaxial with the axis of the container 1 (vertical axis passing through the center of the surface to be spread 2). A large-capacity storage hopper 7 installed on the floor 3 has an inverted conical shape on the lower side, and is suspended by a plurality of supporting members 8a coaxially with the lower part of the storage hopper 7. It consists of a small capacity weighing hopper 8. and,
A rotary discharge device 9 is provided at the lower outlet of the storage hopper 7, and the weighing hopper 8
A damper 10 that is opened and closed by a cylinder 10a is provided at the lower discharge port of the weighing hopper 8, and each load cell 1 is provided in the middle of each support member 8a of the weighing hopper 8.
1 is interposed, and these load cells 1
1 allows a fixed amount of granular material A to be taken out from the storage hopper 7 into the weighing hopper 8. Further, in the lower part of the weighing hopper 8, there is a guide chute 12 having an inverted conical shape on the upper side and a vertical cylindrical shape on the lower side. It is fixedly attached by a plurality of brackets 12a facing the discharge port of the weighing hopper 8, and the guide chute 12
is inserted into a circular opening 3a formed on the floor 3 above the container 1.

On the other hand, the rotation means 5 rotates through the opening 3 of the floor 3.
It is provided in a. That is, the opening 3 in the floor 3
A is fixedly provided with an annular support 13 having a predetermined axis coaxial with the container 1.
A circular rail 14 is laid on the upper inner peripheral edge of the rail. An annular rotary table 15 is mounted on the rail 14, and a plurality of support wheels 16 are mounted on the rail 14, coaxially with the container 1, surrounding the weighing hopper 8, and mounted on the lower surface at a predetermined pitch in the circumferential direction. 14
It is rotatably supported by being rotatably placed on the top. Further, a roller chain 17 is wound around and fixed to the outer peripheral surface of the rotary table 15 in the circumferential direction, while a sprocket 18 meshed with the roller chain 17 is mounted on the upper part of the support base 13. A drive device 19 is provided, and the rotary table 15 is rotated at a constant speed in the circumferential direction by the operation of the drive device 19. The scattering plate 6 is provided on the inner periphery of the lower surface of the rotary table 15 via a plurality of hanging rods 20 .

The scattering plate 6 has a substantially entire circumferential plan view of the outer periphery having a center O on the axis of the container 1, that is, a vertical axis passing through the center of the sprayed surface 2, and r ² = r ₀ N1-( 2) ...where r and θ are polar coordinate variables, and r ₀ is the longest distance from the center O in the plan view shape of the scattering plate (the plan view shape is defined by projecting the scattering plate from the point at infinity above). It is made of a plate defined by a spiral curve that satisfies the shape that occurs on a horizontal plane and is usually shown in a plan view, and as shown in Figure 2, the outer peripheral edge of the main part 2
The plan view shape of 1a is such that the longest distance r ₀ from the center O is approximately equal to the radius of the spread surface 2, and the central angle is, for example, 270
The upper scattering plate 21 has a spiral shape defined by the above formula up to 90 degrees, and the remaining portion with a central angle of 90 degrees, that is, the outer peripheral edge of the other portion, has an arc shape, and the outer peripheral edge of the upper scattering plate 21 21a is provided below the portion where the plan view shape is arcuate, and the outer peripheral edge 2
A guide plate 22a is disposed around the outer circumferential edge having an arc shape with a larger diameter than the arc 1a, and the inner circumferential edge 2
The lower scattering plate 22 has a spiral shape in plan view, which is a continuation of the plan view shape of the outer peripheral edge 21a of the upper scattering plate 21. The upper scattering plate 21 has a conical shape with its center (same as the center O of the scattering plate 6) as the top and its diameter increases as it goes downwards, and the lower scattering plate 22 has a conical shape with its center (same as the center O of the scattering plate 6) as the top, and the lower scattering plate 22 The top is the same as the center O of the plate 6, and it has an inverted conical slope shape whose diameter decreases as it goes downward. Further, on the upper part of the upper scattering plate 21, there are a plurality of (four in the figure) guide plates 23 extending along the generatrix to near the center of the upper scattering plate 21.
are attached at equal intervals in the circumferential direction, and some of these guide plates 23 move the lower scattering plate 22 to the granular material A.
flows down toward the center O (i.e., the inner peripheral edge 22
The upper dispersion plate 21 and the lower dispersion plate 22 are fixed at an interval by tilting downward so as to flow down from b), and are connected to the guide plate 22a at the outer peripheral edge of the lower dispersion plate 22, and , lower scattering plate 22
On the other side other than the spiral inner peripheral edge 22b, the upper scattering plate 2 is
1 and a lower scattering plate 22 are connected to each other, and the lower end of the hanging rod 20 is fixed to these guide plates 23. Note that 24 in the figure is a cylindrical hood.

Here, the above equation will be explained in detail.

First, when the granules A are dropped on the apex of the cone C as shown in Fig. 3a, the granules A are dispersed almost uniformly in the circumferential direction of the cone C and radially move toward the outer periphery of the cone C along its generatrix. It flows down along the line and falls from the outer edge. The outer periphery of such a cone C is shown in Figure 3b.
It is formed so that the plan view shape is a spiral as shown in the figure. Among the inclined surfaces of the cone C' whose outer periphery is spiral, consider two arbitrary fan-shaped surfaces T ₁ and T ₂ having the same central angle θa as shown in FIG. 3c. The maximum and minimum distances from the apex to the outer peripheral edge of these fan-shaped surfaces T ₁ and T ₂ are determined as r ₁ and r ₂ for the fan-shaped surface T 1 and r ₁ and r 2 for the fan-shaped surface T ₂ , respectively, as shown in FIG. For this, let r ₃ and r ₄ . Each fan-shaped surface T ₁ ,
When T ₂ is rotated once in the horizontal direction at a constant speed around its apex and granules A are quantitatively dropped to the apex, the granules A fall at a distance r ₁ on the fan-shaped surface T ₁ .
to r ₂ , on the sector surface T ₂ from the distance r ₃
Each falls through the outer periphery up to r ₄ . Here, since both the fan-shaped surfaces T ₁ and T ₂ have the same central angle θa, the amount of supragranular bodies A falling from each outer peripheral edge is the same, and the area from the fan-shaped surface T ₁ is π(r ₁ ² −r ₂ ² ), the area from the fan-shaped surface T ₂ is π(r ₃ ² −
The granules A are sprinkled on the respective annular belts r ₄ ² ). Therefore, if the shapes of the outer peripheral edges are determined so that the areas of these annular bands are equal to each other, the amount of the granular material A to be spread on these annular bands becomes uniform.

In other words, in Fig. 4, the fan shape with central angle θ
If the granular material A supplied to the center O of OP ₀ P falls from the arc P ₀ P, and the granular material A is supplied without interruption during one revolution of the sector OP ₀ P, then the longest radius r ₀ This means that the granules A are scattered in the annular zone between the radius r. The area S of this annular zone is S = π(r ₀ ² − r ² ) ..., and the amount of granules A scattered on the area S of this annular zone and the fan shape OP ₀ of the central angle θ are Since _the amount _of granular material A flowing down along P _is equal to θ/2π)S ₀ ... From these formulas, (θ/2π)S ₀ = π(r ₀ ² −r ² ). Substituting the relational expression S ₀ = πr ₀ ² ... into this equation, we get r ² = r ₀ ² {1-(θ/2π)}, that is, r=r ₀ √1-(2) ... . According to the conical scattering plate 6 whose outer peripheral edge is defined in plan view by this spiral curve, the granules A can be uniformly dispersed over the entire surface 2 to be sprayed.

Further, in FIG. 5, if the scattering plate 6 has a plan view shape of its outer peripheral edge in a spiral conical shape defined by the above formula, the size of the granular material A, the supply amount ( Depending on the speed) etc., a guide chute 12 may be used to supply the granular material A to the top of the scattering plate 6.
becomes larger in diameter, and the granules A supplied to the top of the dispersion plate 6 fall over a range of diameter d, which is approximately equal to the diameter of the guide chute 12 . In such a case, the granules A supplied to the shaded area W fall directly onto the surface 2 to be sprayed without being received by the scattering plate 6 . In order to prevent this, the lower scattering plate 22 is provided in the range W as described above, and the plan view shape of the inner peripheral edge 22b of the lower scattering plate 22 is also formed into a spiral shape that satisfies the above formula. has been done.

Furthermore, although it is ideal that the plan view shape of the peripheral portion of the scattering plate 6 is formed based on the above formula, it is actually difficult to create a spiral shape based on the formula. Therefore, the spiral shape can also be created using the following simple method without relying on the formula. That is, as shown in Figure 6, first divide the circle into n equal parts and divide the circle into
Draw dividing lines to form a fan shape. Then,
Draw dividing concentric circles that divide the above circle into n rings so that each area is equal. In other words _, the widths _{l 1} , l ₂ ,... , ln (l ₁ <l ₂ <...<ln) and draw n-1 divided concentric circles. Then, starting from the intersection of a certain dividing line of a circle and the outer periphery of the circle, the adjacent dividing line on the counterclockwise side of the dividing line, for example in FIG. If you connect the intersection of the next counterclockwise dividing line and the next dividing concentric circle on the inner side of the above dividing concentric circle with a gentle curve, it will turn 360 degrees from the starting point. A spiral curve R shown in FIG. 6 reaching the center of the circle is obtained. Also, if you connect each of the above intersection points with a straight line,
A spiral line segment R' shown in FIG. 6 is obtained. These spiral curves R or spiral line segments
Both R' are spiral approximate curves or line segments defined by the above formula, and the shape of the peripheral edge of the scattering plate 6 can be determined using these.

Next, one embodiment of the method of the present invention will be described.

The method of the present invention is suitably carried out using the spraying device configured as described above. That is, in the spraying device configured as described above, first, a fixed amount of the granules A to be sprayed onto the surface 2 to be sprayed is taken out from the storage hopper 7 and stored in the weighing hopper 8. Next, the drive device 19 is actuated to rotate the rotary table 15 in the circumferential direction around its axis, thereby moving the spreading plate 6 as shown by the arrow in FIG. Rotate horizontally at a constant speed as shown.
Simultaneously with the rotation of the scattering plate 6, the damper 10 is opened to quantitatively drop and supply the above-mentioned amount of the granular material A stored in the weighing hopper 8. Then, granular material A
drops through the guide chute 12 onto the top (center) of the upper dispersion plate 21 of the dispersion plate 6 . Then, it slides down the sloped upper surface, and most of it falls directly from the outer peripheral edge 21a and is sprayed on the sprayed surface 2, and some of it falls from the outer peripheral edge 21a onto the lower scattering plate 22, and inside it. It is sprayed onto the surface 2 to be sprayed from the peripheral edge 22b. Here, upper scattering plate 2
Both the outer circumferential edge 21a of the lower dispersing plate 22 and the inner circumferential edge 22b of the lower dispersing plate 22 have a spiral shape in plan view defined by the above formula, and these dispersing plates 21 and 22 These dispersion plates 21, 22
The granules A falling from the outer peripheral edge 21a and the inner peripheral edge 22b are uniformly scattered over the entire surface 2 to be sprayed.

In the above, the respective inclination angles α ₁ and α ₂ of the scattering plate 21 and the lower scattering plate 22, their rotational speed N, and the falling supply amount Q of the granular material A should be determined through actual machine tests, etc. Although it depends on various conditions such as the type and properties of the granules A, if the granules A are coke with a particle size of 3 to 4 cm, α ₁ = α ₂ = 35°, N = 4.8 rpm, and
The falling supply amount Q is 133 per rotation of the scattering plate 6.
It is preferable to set it as approximately.

Next, some other embodiments of the present invention will be described.

Figures 7a to 7c show the second embodiment,
In this embodiment, a lower scattering plate 30 having a different shape is used in place of the lower scattering plate 22 having a spiral inner peripheral edge 22b in the first embodiment. , the plan view shape has its apex near the vertical axis passing through the center of the upper scattering plate 21 (the vertical axis passing through the center of the spread surface 2), and the plane length of the shortest generatrix of the upper scattering plate 21 ( Adjacent two having a length approximately equal to a plane length longer than the radius of a circle d whose diameter is approximately equal to the diameter of the guide chute 12.
A rectangular receiving part 3 having a triangular part 30a having sides, and a guide plate 30b provided around the outer periphery and side edges of the triangular part 30a.
It has a structure in which 0c are connected in a row, and the triangular part 3
It is made of a flat plate that is inclined so that the apex of 0a is downward. That is, the lower scattering plate 30 is formed such that the plan view shape of the inner circumferential surface thereof is a straight line connecting the end point of the spiral outer circumferential edge of the upper scattering plate 21 to the center.

8 and 9 show a third embodiment. In this embodiment, the scattering plate 31 has the same shape in plan view as the upper scattering plate 21, but has a horizontal flat upper part. A scattering plate 31a, and a lower scattering plate 31b having the same plan view shape as the lower scattering plate 22 or the lower scattering plate 30 but arranged horizontally.
It consists of A vibration device 32 for vibrating the scattering plate 31 is attached to the scattering plate 31. This vibration device 32 includes a vibration member 32b made of magnetic metal and biased in a predetermined direction by, for example, a plate spring 32a.
is attracted and released by an electromagnet 32d that is excited and de-energized by an alternating current supplied through a slip ring 32c,
The vibration member 32b is moved up and down to vibrate the scattering plate 31, and the vibration member 32b is engaged with the scattering plate 31 by a locking member 32e while allowing the rotation of the scattering plate 31. The device body 32f, to which the leaf spring 32a and electromagnet 32d are attached, is fixed to a required fixing portion via a bracket 32g. In this embodiment, while the scattering plate 31 is vibrated by the vibrating device 32, it is rotated in the circumferential direction by the rotating means 5, and the granules A are dropped onto the center of the scattering plate 31 from the weighing hopper 8 through the guide chute 12. supply. Then, the granular material A spreads radially in the radial direction due to the vibration of the scattering plate 31, and falls from its periphery (outer periphery in the upper scattering plate 31a, inner periphery or triangular part in the lower scattering plate 31b). , is sprayed onto the surface 2 to be sprayed. Note that the vibration device 32 may be fixed to the dispersion plate 31 itself instead of the required fixed part. Further, the current supplied to the vibration device 32 may be taken from two rails of the rotary table 15, for example. Furthermore, when the vibration device 32 is added to the scattering plate 6 of the first embodiment, there may be cases where it is difficult for the granules A to flow down on the scattering plate 6, or there is a need to increase the scattering speed of the granules A. In such a case, the vibrating device 32 can be operated as necessary to promote the flow of the granular material A, which is convenient.

Furthermore, the present invention is not only applicable to the dispersion of granular material A such as coke;
Needless to say, this method can also be applied to spraying various liquids.

Although the first to third embodiments have been described using a scattering plate whose longest distance from the center in the plan view is approximately equal to the radius of the sprayed surface, the present invention is not limited thereto. Alternatively, the spreading plate may be moved at a constant speed over a wide spread surface. For example, for an annular spread surface, a dispersion plate rotated by a rotating means such as rotation and revolution may be moved in an annular shape together with a material supply device at a constant speed. By sequentially moving the material according to the shape, the material can be uniformly spread on surfaces of various shapes.

Further, in each embodiment, the material supply device of the present invention is composed of the storage hopper 7 and the weighing hopper 8, but it may also be composed only of the storage hopper 7 and the discharging device 9 provided at its lower part. Any material that can quantitatively supply the material to the center of the plate may be used.

〔Effect of the invention〕

As explained above, the first invention provides a granular material,
In a method of dispersing granular materials, liquids, etc. to uniformly disperse materials such as liquids, the shape of the outer periphery of the main part is a spiral shape starting from the longest distance from the center in a plan view and making approximately one revolution to reach the center. an upper scattering plate formed in a partial shape, and an upper scattering plate provided below the other outer peripheral edge of the upper scattering plate, the plan view shape of the inner circumferential edge being the end point of the spiral outer circumferential edge of the upper scattering plate. The material is quantitatively dropped onto the center of the upper scattering plate while rotating the lower scattering plate having a shape from In the main part of the upper dispersion plate, the material flows down from the spiral outer circumference of the upper dispersion plate, and in the other outer circumference of the upper dispersion plate, the material flows down from the spiral outer circumference of the upper dispersion plate. The second invention is a device for dispersing granules, liquids, etc., which uniformly spreads materials such as granules, liquids, etc. , a material supply device for quantitatively dropping the material is disposed below the material supply device, and the shape of the outer peripheral edge of the main part is approximately one rotation from the longest distance from the center in the plan view shape. an upper scattering plate formed in a spiral partial shape to reach the center thereof, and receiving the material dropped from the material supply device onto the center portion and causing it to flow down from the outer peripheral edge; and a plan view shape of the inner peripheral edge. and a lower scattering plate having a shape extending from the end point of the spiral outer peripheral edge of the upper scattering plate to the center, and receiving the material flowing down from the other outer peripheral edge of the upper scattering plate and causing it to flow down from the inner peripheral edge. and rotating means for rotating these dispersion plates at the same horizontal direction at a constant speed around the center of the dispersion plates. It can be sprayed evenly and quickly over the entire surface, and the device has a simple structure and does not require large operating power.

[Brief explanation of the drawing]

Figures 1 to 6 show one embodiment of the present invention, in which Figure 1 is an overall sectional view of the spraying device, Figure 2 is a sectional view taken along the - arrow in Figure 1, and Figures 3 a to d. , FIG. 4 and FIG. 5 are explanatory diagrams for explaining a spiral curve, FIG. 6 is an explanatory diagram of a simple method for creating a spiral shape, and FIG. 7 is a partial diagram showing a second embodiment. Figure 7a is a plan view of the scattering plate, Figure 7b
is a sectional view taken along the line bb in FIG. 7a, FIG. 7c is a plan view of the lower dispersion plate, FIGS. 8 and 9 show the third embodiment, and FIG. , FIG. 9 is an enlarged sectional view of the vibrating device portion. A... Granular body, 4... Material supply device, 5... Rotating means, 21, 31a... Upper scattering plate, 21a...
...outer peripheral edge, 22, 30, 31b...lower scattering plate, 22b...inner peripheral edge.

Claims (1)

[Scope of Claims] 1. In a method of dispersing granules, liquids, etc., for uniformly dispersing materials such as granules, liquids, etc., the shape of the outer peripheral edge of the main part is defined as the longest distance from the center in a plan view. There is an upper scattering plate formed in a spiral partial shape that rotates approximately once and reaches the center, and the other part of the upper scattering plate is provided below the outer peripheral edge, and the plan view shape of the inner peripheral edge is similar to that of the upper scattering plate. While rotating a lower scattering plate having a shape extending from the end point of the spiral outer peripheral edge of the plate to the center at a constant speed in the same horizontal direction about the center, In the main part of the upper scattering plate, the material is caused to flow down from the spiral outer periphery of the upper scattering plate, and in the other outer periphery of the upper scattering plate. A method for dispersing granules, liquids, etc., characterized in that the above-mentioned material is spread by flowing down from the outer circumferential edge of the other part through the inner circumferential edge of a lower scattering plate. 2 The plan view shape of the spiral outer peripheral edge of the upper scattering plate or the plan view shape from the end point of the spiral outer peripheral edge of the upper scattering plate to the above center at the inner peripheral edge of the lower scattering plate is r=r ₀ √1 -(2) However, r and θ are variables of polar coordinates, and _r0 is defined by a spiral curve satisfying the longest distance from the center in the plan view shape of the scattering plate. How to spread granules, liquids, etc. 3 The plan view shape of the spiral outer peripheral edge of the upper scattering plate or the plan view shape from the end point of the spiral outer peripheral edge of the upper scattering plate to the above center at the inner peripheral edge of the lower scattering plate is r=r ₀ √1 −(2) However, r and θ are polar coordinate variables, and r ₀ is defined by the spiral shape that connects multiple points on the spiral curve with straight lines that satisfy the longest distance from the center in the plan view of the scattering plate. A method for dispersing granules, liquids, etc. according to claim 1. 4. The plan view shape from the end point of the spiral outer periphery of the upper scattering plate to the center at the inner periphery of the lower scattering plate is connected by a straight line from the end point of the spiral outer periphery of the upper scattering plate to the center. A method for dispersing granules, liquids, etc. according to claim 1, characterized in that the shape is 5. In a granular material, liquid, etc. dispersion device that uniformly spreads granular material, liquid, etc., a material supply device that drops the above-mentioned material quantitatively is disposed, and below the material supply device, there is a main part. The shape of the outer peripheral edge of is formed into a spiral partial shape starting from the longest distance from the center in the plan view and reaching the center by approximately one rotation, and the material dropped from the material supply device is placed in the center. an upper scattering plate that is received above and flows down from an outer peripheral edge; and an inner circumferential edge having a plan view shape extending from the end point of the spiral outer peripheral edge of the scattering plate to the center; A lower scattering plate is provided which receives the material flowing down from the outer peripheral edge and causes the material to flow down from the inner peripheral edge. 1. A dispersing device for dispersing granules, liquids, etc., characterized by being provided with a rotating means for rotating the particles. 6 The plan view shape of the spiral outer peripheral edge of the upper scattering plate or the plan view shape from the end point of the spiral outer peripheral edge of the upper scattering plate to the above center at the inner peripheral edge of the lower scattering plate is r=r ₀ √1 -(2) where r and θ are variables of polar coordinates, and r ₀ is defined by a spiral curve that satisfies the longest distance from the center in the plan view shape of the scattering plate; Spraying equipment for granules, liquids, etc. 7 The plan view shape of the spiral outer peripheral edge of the upper scattering plate or the plan view shape from the end point of the spiral outer peripheral edge of the upper scattering plate to the above center at the inner peripheral edge of the lower scattering plate is r=r ₀ √1 −(2) However, r and θ are polar coordinate variables, and r ₀ is defined by a spiral shape that connects multiple points in a spiral curve with straight lines that satisfy the longest distance from the center in the plan view of the scattering plate. A device for dispersing granules, liquids, etc. according to claim 5. 8. A plan view from the end point of the spiral outer periphery of the upper scattering plate to the center at the inner periphery of the lower scattering plate is connected by a straight line from the end point of the spiral outer periphery of the upper scattering plate to the center. The device for dispersing granules, liquids, etc. according to claim 5, characterized in that the device has a shape.