Granulation device

Abstract

To provide a granulater that can make particles into a target particle size.SOLUTION: A granulater 1 can produce particles Q and includes a particle size regulator 7 that can regulate the particle size of the particles Q. The granulater 1 also includes a pan tray 2 on which the particles Q accumulate, a first feeder 4 having a first port 411 for feeding cores Q1, which are starting materials of the particles Q, to the pan tray 2, and a second feeder 5 having second ports 511 and 521 to feed a liquid binder Q2, which bind the cores Q1 to form the particles Q, to the pan tray 2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a granulating device. [Background technology]

[0002] Granulators for producing particles are known (see, for example, Patent Document 1). The granulator described in Patent Document 1 includes a rotatably supported granulation tray, a discharge pipe for discharging powder elements into the granulation tray, and a nozzle for discharging water into the granulation tray. In this granulation tray, powder elements bond together via water within the rotating granulation tray to form granules. The granulation tray also includes a moisture meter for measuring the moisture content of the granules formed in the granulation tray. This allows the amount of water supplied to the granulation tray to be adjusted based on the measurement results from the moisture meter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3071137 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the granulator described in Patent Document 1 has a problem in that the particle size of the particles cannot be adjusted to a target size simply by adjusting the amount of water supplied. An object of the present invention is to provide a granulating apparatus capable of adjusting the particle size of particles to a target size. [Means for solving the problem]

[0005] One embodiment of the granulation apparatus of the present invention is a granulation apparatus for producing particles, comprising a bread tray on which the particles are deposited, a first supply section having a first supply port for supplying cores that become the particles to the bread tray, and a second supply section having a second supply port for supplying a liquid binder to the bread tray, which binds the cores together to form the particles; the bread tray is supported so that the bottom surface of the bread tray is an inclined surface that is inclined relative to the horizontal direction; When the core moves upward in the tilt direction, it restricts its movement limit. a restricting plate is provided, and the second supply port is disposed below the restricting plate in the direction of inclination of the inclined surface, thereby constituting at least a part of a particle size adjusting section capable of adjusting the particle size of the particles; At least two second supply ports are arranged, one of the two second supply ports supplies the binder to the core, and the other second supply port supplies further binder to the core to which the binder has been supplied, the one second supply port and the other second supply port are arranged offset along the inclination direction of the inclined surface, the one second supply port is arranged closer to the regulating plate than the other second supply port, and the particle size adjusting unit adjusts the particle size by the other second supply port. A granulation device characterized by: [Effects of the Invention]

[0006] According to the present invention, the particle size of the particles can be accurately adjusted by the particle size adjusting unit, which allows the particle size to be adjusted to a target size depending on, for example, the intended use of the particles, thereby making the particles easier to use. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a vertical cross-sectional side view showing a first embodiment of a granulating apparatus according to the present invention. [Figure 2] FIG. 2 is a block diagram of the main parts of the granulating apparatus shown in FIG. [Figure 3] FIG. 3 is a view seen in the direction of arrow A in FIG. [Figure 4] FIG. 4 is a diagram illustrating an example of a process for producing particles by the granulating apparatus shown in FIG. [Figure 5] FIG. 5 is a diagram showing a second embodiment of the granulating apparatus of the present invention. [Figure 6] FIG. 6 is a diagram showing a third embodiment of the granulating apparatus of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A granulating apparatus according to the present invention will now be described in detail with reference to preferred embodiments shown in the accompanying drawings. For convenience of explanation, the upper side in FIGS. 1, 3, 5, and 6 will be referred to as "top" (upper side), and the lower side will be referred to as "bottom" (lower side).

[0009] First Embodiment A first embodiment of a granulating device of the present invention will be described with reference to FIGS. The granulating apparatus 1 shown in FIG. 1 is a pan-type granulating machine that produces particles Q. This granulating apparatus 1 includes a pan 2, a rotary support mechanism 3, a first supply unit 4, and a second supply unit 5. As shown in FIG. 2, the granulating apparatus 1 also includes a control unit 6. The configuration of each unit will be described below.

[0010] The bread dish 2 is composed of a dish-shaped member having a disk-shaped bottom 21 and a side wall 22 formed along the outer periphery of the bottom 21. Particles Q can accumulate inside this member. This bread plate 2 is supported by a rotation support mechanism 3 so that the upper surface of the bottom 21 forms an inclined surface 211 that is inclined relative to the horizontal direction.

[0011] The pivoting support mechanism 3 has a motor 31 and can rotatably support the bread plate 2. When the motor 31 is activated, the bread plate 2 can rotate around a normal line NM211 of the inclined surface 211 that passes through the center O211 of the inclined surface 211. As shown in FIG. 3 , in this embodiment, the bread plate 2 rotates in the clockwise direction indicated by the arrow α. However, the bread plate 2 can also rotate in the counterclockwise direction indicated by the arrow α. The rotation support mechanism 3 may be configured to be able to adjust the inclination angle of the bread plate 2 (inclined surface 211).

[0012] The first supply unit 4 supplies powdered cores Q1 that become particles Q to the bread plate 2. The cores Q1 can also be called "powder elements," and the particles Q are formed by bonding together. The first supply unit 4 has an input unit 41, a conveying unit 42, a motor 43, and a discharge unit 44.

[0013] The input section 41 is a hopper into which the core Q1 is input. The input section 41 is, for example, funnel-shaped. The conveying section 42 is composed of a screw conveyor that conveys the core Q1 by rotating a screw 421. The conveying section 42 is connected to an input section 41 on the upstream side in the conveying direction of the core Q1, and to a discharge section 44 on the downstream side.

[0014] The motor 43 is connected to the screw 421 and is capable of rotating the screw 421 . The discharge section 44 is tubular and has a first supply port 441 that opens downward above the bread plate 2. The core Q1 is discharged from the first supply port 441. This allows the core Q1 to be supplied to the bread plate 2.

[0015] The first supply port 441 (first supply section 4) is fixed in position relative to the bread plate 2. This allows the cores Q1 to be supplied constantly and stably. As shown in FIG. 3, the first supply opening 441 is disposed eccentrically toward the side wall portion 22 rather than toward the center O211 of the bread plate 2.

[0016] The second supply unit 5 supplies a liquid binder Q2 to the bread plate 2. The binder Q2 binds the cores Q1 together to form particles Q. The binder Q2 is not particularly limited, and may be, for example, water. Furthermore, a flocculant or a heavy metal fixing agent may be added to the binder Q2 as appropriate. The amount of binder Q2 supplied is appropriately changed depending on the amount of cores Q1 supplied.

[0017] The second supply unit 5 includes a nozzle 51 , a nozzle 52 , a connecting unit 53 , a pump 54 , and an inverter 55 . Nozzle 51 and nozzle 52 are connected to pump 54 via connecting part 53. Nozzle 51 also has a second supply port 511 that opens on bread plate 2 facing bottom 21 of said bread plate 2. Similarly, nozzle 52 also has a second supply port 521 that opens on bread plate 2 facing bottom 21 of said bread plate 2.

[0018] The pump 54 is operated by an inverter 55 . Then, when the pump 54 is operated, the binder Q2 passes through the connecting portion 53 and is sent to the nozzles 51 and 52. As a result, the binder Q2 is discharged from the second supply port 511 of the nozzle 51, and also from the second supply port 521 of the nozzle 52. This allows the binder Q2 to be supplied to the bread plate 2.

[0019] As mentioned above, the bread plate 2 can rotate about its center O211. This rotation is maintained while the core Q1 and binder Q2 are being fed. 3, the first supply port 441 is located lower in the inclination direction β of the inclined surface 211 than the second supply port 511 and the second supply port 521. As a result, the core Q1 supplied from the first supply port 441 moves upward in the inclination direction β as the bread plate 2 rotates.

[0020] The bread plate 2 preferably has a limiting plate 23 that limits the movement of the core Q1 when it moves upward in the tilt direction β (see FIG. 3). Near this limit position, the core Q1 and the binder Q2 can be in sufficient contact with each other. Then, the binder Q2 adheres to each core Q1, forming a film of the binder Q2 on the surface of the core Q1. As a result, the cores Q1 are stirred by the rotation of the bread plate 2 and are bound together by the surface tension of the film of the binder Q2 to become particles Q. The particles Q slide down the inclined surface 211, accumulate downward in the inclination direction β, and are eventually discharged from the bread plate 2 by overflow. The particles Q are collected in a collection section (not shown).

[0021] The second supply port 511 and the second supply port 521 (second supply unit 5) are fixed in position relative to the bread plate 2. This allows the binder Q2 to be supplied stably. The second supply port 511 and the second supply port 521 are each configured to spray the binder Q2. That is, the nozzle 51 and the nozzle 52 are each a spray nozzle. This allows the binder Q2 to be diffused over as wide an area as possible, which contributes to adjusting (controlling) the particle size of the particles Q.

[0022] The granulation device 1 preferably includes a moisture measuring unit that measures the moisture content of the particles Q formed in the bread tray 2. This makes it possible to adjust the amount of binder Q2 supplied to the bread tray 2 based on the measurement results from the moisture measuring unit.

[0023] 2, the control unit 6 is electrically connected to the rotary support mechanism 3, the first supply unit 4, and the second supply unit 5, and controls the operation of these units. The control unit 6 has a CPU 61 and a storage unit 62. The CPU 61 can execute, for example, a control program stored in advance in the storage unit 62. The control program includes, for example, a program for controlling the operating conditions (operation timing) of the rotary support mechanism 3, the first supply unit 4, and the second supply unit 5 to produce particles Q.

[0024] In steel plants equipped with electric furnaces, metal powders such as iron and zinc are generated during the steelmaking process. These metal powders are sometimes recovered using recovery machines and reused. When reused, the metal powders are preferably recovered in the form of agglomerated particles with particle sizes of, for example, 5 to 10 mm. This makes them easier to reuse.

[0025] In the following, as an example, a case where the granulating apparatus 1 is used in a steel mill will be described. In this case, metal powder is referred to as cores Q1, water containing a flocculant is referred to as binder Q2, and the metal powder in a particulate state is referred to as particles Q. The granulating device 1 is provided with a particle size adjusting unit 7 that can adjust the particle size of the particles Q. Here, the "particle size" refers to, for example, a particle size measured by a laser diffraction particle size distribution measuring method. of It also refers to the particle size measured by sampling particles Q during granulation and measuring them with a vernier caliper or similar.

[0026] In this embodiment, the particle size adjusting section 7 is configured by the second supply section 5 (particularly the second supply port 511 and the second supply port 521). 3, from the imaginary line VL connecting the first supply port 411 and the regulating plate 23, Through the center O211 The area on the inclined surface 211 up to the side wall portion 22 is divided into four. The four divided areas are referred to as "area a," "area b," "area c," and "area d" in order from the virtual line VL side. The white arrows in FIG. 3 show how the particle Q moves toward the lower left and the particle size increases. The same applies to the white arrows in FIGS. 5 and 6.

[0027] The second supply port 511 and the second supply port 521 are arranged to be offset from each other along the tilt direction β. That is, the second supply port 511 is arranged to face the region a above the tilt direction β, and the second supply port 521 is arranged to face the region b below the second supply port 511 in the tilt direction β. As a result, the supply position of the binder Q2 supplied from the second supply port 511 and the supply position of the binder Q2 supplied from the second supply port 521 are different relative to the bread plate 2.

[0028] As described above, as shown in FIG. 3, by rotating the bread plate 2 and supplying binder Q2 from the second supply port 511 and the second supply port 521, the surface of the bread plate 2 is divided into, for example, areas a, b, c, and d. Region a has finer particles Q, so it is formed across region a and region d as the bread plate 2 rotates. Region b has larger particles Q than region a, so it is formed across region b and region d as the bread plate 2 rotates. Region c has even larger particles Q than region b, so it is formed across region d as the bread plate 2 rotates. Region d has larger particles Q than region c, so it is formed near region d as the bread plate 2 rotates. In this way, the particle size of the particles Q distributed inside the bread plate 2 varies depending on the size of the particles Q. As shown in FIG. 4, when binder Q2 is supplied (primary supply) from the second supply port 511, binder Q2 adheres to the core Q1, forming a film of binder Q2 on the surface of the core Q1. Furthermore, as the bread plate 2 rotates, the core Q1 on which the film of binder Q2 has been formed (hereinafter referred to as the "film-coated core Q1'") rotates in a spiral shape around the center of region d. Furthermore, particles Q gradually increase in size from region a toward the center of the spiral. In other words, region a is a group of particles with small particle sizes, region b is a group of particles with slightly larger particle sizes, and each region is composed of a group of particles with the same particle size due to the classification effect. Therefore, particles Q grow (their particle size increases) and move from region a to region d.

[0029] The supply of binder Q2 from the second supply port 521 (second supply) further supplies binder Q2 to the cores Q1 to which binder Q1 has been supplied in the first supply, i.e., it is possible to supplement the binder Q2. As a result, the film-coated cores Q1' are supplemented with binder Q2 and can bond with other film-coated cores Q1'. In this way, particles Q with adjusted particle size are produced by the second supply port 521.

[0030] In addition, at this time, the particle size of the particles Q can be adjusted depending on the position of the secondary supply. In the configuration shown in FIG. 3, the second supply port 521 is disposed opposite the region b. This allows the binder Q2 to be supplied from the region b, which makes it easier for the particles Q to grow to the particle size of the region c or region d. This growth allows the particle size of the particles Q to be adjusted.

[0031] 3, the second supply port 521 may be disposed opposite the region c. This allows the binder Q2 to be supplied from the region c, which makes it easier for the particles to grow to the particle size in the region d. This growth allows the particle size of the particles Q to be adjusted.

[0032] As described above, the particle size of the particles Q can be accurately adjusted by the particle size adjusting unit 7 having the second supply port 511 and the second supply port 521. This allows the particle size of the particles Q to be adjusted to a target size. When the granulating device 1 is used in a steel mill, the particle size of the particles Q can be adjusted to 5 to 10 mm, which contributes to the reuse of the cores Q1, which are metal powder.

[0033] Second Embodiment Hereinafter, a second embodiment of the granulating apparatus of the present invention will be described with reference to FIG. 5. The differences from the previous embodiment will be mainly described, and a description of the same points will be omitted.

[0034] As shown in FIG. 5, the second supply port 521 (nozzle 52) is supported movably relative to the bread plate 2 via a movement mechanism (not shown). This allows the second supply port 521 to move back and forth between region b and region c, for example. When the second supply port 521 is located in region b, the particles Q can be made to grow more easily in region c. Furthermore, when the second supply port 521 is located in region c, the particles Q can be made to grow more easily in region d.

[0035] Furthermore, the second supply port 521 can be stopped at any position on the region b or region c, respectively, so that the particle size of the particles Q can be adjusted to a desired size depending on the position of the second supply port 521.

[0036] In this embodiment, the number of components of the second supply unit 5 can be reduced compared to when the second supply ports 521 are arranged on the region b and the region c, and costs can be reduced. The moving mechanism is not particularly limited, but may be configured, for example, by a motor, a ball screw connected to the motor, and a linear guide connected to the ball screw.

[0037] Third Embodiment Hereinafter, a third embodiment of the granulating apparatus of the present invention will be described with reference to FIG. 6. The differences from the previous embodiment will be mainly described, and a description of the same points will be omitted.

[0038] 6, second supply ports 521 are disposed above region b and region c. These second supply ports 521 are appropriately selected and used to supply binder Q2. This allows the particle size of particles Q to be adjusted to a desired size depending on the selected second supply port 521.

[0039] In this embodiment, compared to the second embodiment in which the second supply port 521 is movable, the time required for moving the second supply port 521 can be saved, thereby enabling rapid particle size adjustment.

[0040] Although the granulating apparatus of the present invention has been described above in relation to the illustrated embodiment, the present invention is not limited to this, and each component of the granulating apparatus can be replaced with any component that can perform the same function. In addition, any component may be added. Furthermore, the granulating device of the present invention may be a combination of any two or more of the configurations (features) of the above-described embodiments.

[0041] Furthermore, as an application mode of the granulation device 1, in each of the above embodiments, the granulation device 1 is used in a steel factory equipped with an electric furnace, but this is not limited to this, and it can also be used, for example, in a waste treatment and incineration plant, etc. In addition, in each of the above-described embodiments, the second supply unit 5 constitutes the particle size adjusting unit 7, but this is not limiting. For example, the first supply unit 4 may also constitute the particle size adjusting unit 7. That is, the particle size adjusting unit 7 can also adjust the supply amount of cores Q1 supplied from the first supply unit 4 to adjust the particle size. [Explanation of symbols]

[0042] 1 Granulation equipment 2 bread plates 21 Bottom 211 Slope 22 Side wall 23 Restriction board 3 Rotating support mechanism 31 Motor 4 1st supply section 41 Insertion section 42 Conveyor 421 Screw 43 Motor 44 Discharge section 441 1st supply port 5 Second supply section 51 nozzles 511 2nd supply port 52 nozzles 521 2nd supply port 53 Connecting part 54 Pump 55 inverter 6 Control Unit 61 CPU 62 Storage section 7 Particle size adjustment section a area b area c area d area NM211 Normal O211 center Q particle Q1 Core Q1' membrane core Q2 Binder VL Virtual Line α arrow β Tilt direction

Claims

1. A granulation apparatus for producing particles, comprising: a bread pan on which the particles are deposited; a first supply unit having a first supply port for supplying the cores to be the particles to the bread plate; a second supply section having a second supply port for supplying a liquid binder to the bread plate, the liquid binder binding the cores together to form the particles; Equipped with The bread plate is supported so that the bottom surface of the bread plate is an inclined surface inclined with respect to the horizontal direction; a restricting plate is provided above the inclined surface in the inclined direction to restrict the movement limit of the core when the core moves upward in the inclined direction; the second supply port is disposed below the regulating plate in the inclination direction of the inclined surface, thereby constituting at least a part of a particle size adjusting unit capable of adjusting the particle size of the particles; At least two second supply ports are arranged, one of the two second supply ports supplies the binder to the core; the other second supply port is for supplying further binder to the core to which the binder has been supplied, the one second supply port and the other second supply port are arranged to be offset from each other along the inclination direction of the inclined surface, the one second supply port is disposed closer to the regulating plate than the other second supply port, The particle size adjusting unit adjusts the particle size by the other second supply port. A granulation device characterized by:

2. the first supply port is fixed in position relative to the bread plate, The granulating apparatus according to claim 1 , wherein the second supply port is fixed in position relative to the bread tray or is movable relative to the bread tray.

3. 3. The granulating apparatus according to claim 1, wherein the bread tray is supported so as to be rotatable around a normal to the inclined surface.

4. 4. The granulating apparatus according to claim 1, wherein the first supply port is positioned lower than the second supply port in the direction of inclination of the inclined surface.

Images