JP3335403B2 - Granulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for granulating fly ash having a small particle size generated when incinerating refuse in a refuse incineration plant.

[0002]

2. Description of the Related Art A conventional ash solidification apparatus solidifies fly ash by adding cement and water (humidifying water) to fine fly ash generated when incinerating waste in a waste incineration plant. ing. As a result, the fly ash can be transported to the garbage disposal site without being scattered, and can be further reclaimed, so that secondary pollution due to scattering of the fly ash and elution of harmful heavy metals contained in the fly ash can be prevented.

[0003] As a main part of the ash solidifying apparatus, there are the following types.

That is, as shown in FIG. 8, a fly ash solidifying kneader 1 is formed of fly ash, cement and humidified water after kneading fly ash, cement and humidified water in the fly ash solidified kneader 1. The solidified particles are discharged from the discharge port 1a. The discharged solidified particles naturally fall and arrive on the curing conveyor 2. The curing conveyor 2 conveys the solidified particles that have arrived in the direction shown by the arrow a, and naturally falls from the end of the curing conveyor 2 to a solidified bunker (not shown) located below.
Here, the belt of the curing conveyor 2 is set to such a size that the solidified particles can be cured before the solidified particles are conveyed by the curing conveyor 2. As a result, the solidified particles are cured while being transported by the curing conveyor 2.

[0005]

However, if the state of kneading of the fly ash solidifying kneader 1 becomes inappropriate, fly ash or cement alone, or particles of fly ash or cement and humidified water are discharged from the discharge port 1a. Therefore, there is a problem that all fly ash cannot be solidified.

As a method of solving the above problem experimentally, as shown in FIG. 9, incompletely solidified particles (4a) containing almost no fly ash, cement or humidified water on a rubber plate 27 are shown. , 4b) That is, fly ash and humidified water or cement and humidified water are kneaded and not hardened but in the form of particles 4a and the mixture of fly ash and cement in the form of fine particles 4b
Is collected under the outlet 1a by a predetermined amount (a).
(B) about 7 to 10 times with both hands in the directions indicated by arrows b and c. In other words, the friction between the rubber plate 27 and the incompletely solidified particles 4a, 4b causes the incompletely solidified particles 4a, 4b to move along the rubber plate 27, and the incompletely solidified particles 4a, 4b are further connected to each other. The particles are granulated at the granular level by contact with each other. Thus, it has been confirmed that most of the incompletely solidified particles 4a and 4b become solidified particles 5 (c).

However, in the above-mentioned solution, there is a disadvantage that it is difficult to increase the throughput of fly ash in the actual operation of the ash solidifying device. The present invention has been made in view of the above points, and it is an object of the present invention to propose a granulating apparatus that converts incompletely solidified particles into solidified particles.

[0008]

According to a first aspect of the present invention, there is provided a fly ash solidifying kneader for kneading granulated material and discharging incompletely solidified granules from an outlet, and an outlet of the fly ash solidifying kneader. A curing conveyer disposed below the curing conveyer for conveying the solidified granules, a cover disposed between an outlet of the fly ash consolidation kneader and the curing conveyer, and a cover for the fly ash consolidation kneader. A granulated material carrier is arranged below the discharge port, and the granulated material carrier has an endless granulating belt whose upper surface can move from a low place to a high place. A solidified granulator that is wound around a pulley and one or both of the pulleys are connected to a driving device, and a distance in a height direction between a discharge outlet of the fly ash solidifying kneader and the solidified granulator. A solidified granulator supported by the adjustable support means and disposed within the cover. It is.

A second invention of the present invention is the granulating apparatus according to the first invention, wherein the support means of the solidified granulator can change the inclination of a granulating belt.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Example 1 In FIG. 1 in which the same reference numerals are assigned to the same parts as in FIG. 8, the solidified granulator 10 is provided with an outlet 1 of a fly ash solidifying kneader 1.
a and is located above the curing conveyor 2. Thereby, the solidified granulator 10 can receive the solidified granules and the incompletely solidified granules that fall naturally from the discharge port 1a, and the solidified granules can reach the curing conveyor 2 by the natural fall. .

The solidified granulator 10 is, as shown in FIG.
The driving pulley 3, the driven pulley 6, a granulation belt 7 as a granulated material carrier wound around the driving pulley 3 and the driven pulley 6, and a driving device.

Here, as shown in FIG. 3, a drive pulley shaft 3a fixed to the drive pulley 3 is rotatably supported by the machine frame 8 of the solidified granulator 10. A driven pulley shaft 6 a that rotatably supports the driven pulley 6 is fixed to the machine frame 8. The drive pulley shaft 3a is connected to an output shaft of a speed reducer 9 fixed to the machine frame 8, and an input shaft of the speed reducer 9 is a motor 11 suitable for inverter control such as an induction motor or a synchronous motor.
It is connected to. The motor 11 is driven by an inverter 12, and the inverter 12 is controlled by a control device 13 so that the motor 11 can be energized at a variable frequency.

The granulating belt 7 is, for example, a rubber belt reinforced with fibers and has a predetermined coefficient of friction against incompletely solidified granules, but has a large number of projections or ridges or dents across its surface on the surface. It is suitable. In addition, by sliding the incompletely solidified particles until they become solidified particles, the particle size is increased so that granulation can be performed at the particle level.

The solidified granulator 10 is provided so that its inclination and height can be changed. An already solid machine frame 8 is a horizontal member 8a which is inserted between the granulating belts 7 of the solidified granulator 10 right and left.
Is rigidly connected. The machine frame 8 is supported by movable four pillars 20a and 20b as supporting means, and the two pillars 20a on the side close to the drive pulley 3 have a slide guide 16 on a vertical slide base 15 fixed to a base 14 with the same configuration. The vertical slide 17 is vertically movably engaged via
The upper end of the vertical slide 17 is pivotally attached to the machine frame 8 by a support pin 18 fixed parallel to the drive shaft 3a. An output shaft of a reduction motor 22 fixed to the slide base 15 is connected to a vertical feed screw 21 screwed into a nut 19 fixed to the vertical slide 17. Pillar 20b is Pillar 2
0a . The lower end of the double slide base 15 on the driven pulley 6 side is a bracket fixed to the base 14
15b is pivotally mounted with a pin 15a.

In the above, the solidified granulator 10 is closed by the cover 23 and the imperfect solidified granules 4
a, 4b or the solidified particles 5 are prevented from scattering around.

The operation of the above configuration will be described. The control device 13 instructs the inverter 12 to rotate the electric motor 11, the rotation of the electric motor 11 is reduced by the speed reducer 9, and the driving pulley 3 rises above the granulating belt 7 from the driven pulley 6 to the driving pulley 3. Rotate in the direction you want. When the incompletely solidified particles 4a, 4b arrive on the granulation belt 7 from the discharge port 1a of the fly ash solidification kneader 1, the granulation belt 7 moves in the upward direction shown by the arrow d as shown in FIG. ing. The incompletely solidified granules 4a and 4b receive the force pulled up in the d direction by the frictional force with the granulation belt 7 by the movement of the granulation belt 7 in the d direction, and the gravity of the granulation belt 7 due to the inclination of the granulation belt 7. Receive the power to go down. Such frictional forces are constantly changing in magnitude. Therefore, the incompletely solidified granules 4a, 4b are lifted, rolled down, or jumped along the granulation belt 7, and move in the directions indicated by arrows e, f, or g, for example. During this time, the incompletely solidified particles 4a and 4b come into contact with each other to form solidified particles 5.

In this operation, the incompletely solidified particles 4a, 4a
The more b is retained on the granulation belt 7 as much as possible, the larger the amount of fly ash and cement collected. To increase the residence time, (1) widen the granulation belt sufficiently. (2)
Adjust the distance between the granulation belt and the outlet of the fly ash solidification kneader. This adjustment is performed by rotating the reduction motor 22 so that the feed screw 21
Is rotated, the nut 19 moves up and down, and the vertical slide 17 moves up and down. Therefore, the four columns 20a and 20b supporting the solidified granulator 10 are expanded and contracted. (3) Change the inclination of the granulation belt. For this purpose, the two columns 20a and 20b on the drive pulley 3 and the driven pulley 6 side are adjusted in the same manner as described above. (4) The speed of the granulating belt 7 is changed by changing the frequency of the inverter 12 to change the speed of the electric motor 11. And so on. Thus, as the granulation proceeds, the granules become solidified granules 5, fall onto the curing conveyor 2, and hydrate on the curing conveyor 2 having a size and a traveling speed sufficient to obtain a sufficiently long residence time for solidification, and the curing proceeds.

Second Embodiment FIG. 5 is a perspective view of a second embodiment. The granulating belt 7 is wound around the driving pulley 3 arranged at a low place and the driven pulley 6 arranged at a high place, and rotates so that the upper surface of the belt rises in the direction of the arrow in the drawing, and the lower side is the belt tension side. This way,
Since the incompletely solidified particles 4a and 4b have a small particle size, they have a small rolling resistance and reciprocate on the slack side of the granulating belt 7 whose inclination angle changes gradually from below to above, and when the solidified particles 5 have a large particle size. Since the rolling resistance is small, it moves in opposition to the movement of the granulation belt 7 and falls from the lower drive pulley 3 side.

Embodiment 3 FIG. 6 is a diagram showing only a driving pulley or a driven pulley as viewed from the front. For example, if the drive pulleys are provided with pulleys 3R and 3L on both sides of the central pulley 3M so as to lower the axis toward the central pulley 3M, and the middle in the width direction of the granulating belt becomes concave, The fully solidified granules 4a and 4b gather at the center in the width direction of the granulation belt 7, and the granulation action is concentrated in a narrow portion. This embodiment is applicable to the first and second embodiments.

Reference Example 1 FIG. 7 is a perspective view of Reference Example 1 . The rotating shaft 23 supported by a bearing (not shown) and connected to the driving device is provided with a granulating plate 24 having a container shape, for example, a conical shape, having a concave upper surface, as a granulating material carrier. In this embodiment, a disk is shown as a granulating plate. The rotating shaft 23 and the granulating plate 24 are inclined and rotate in the direction of the arrow shown in the figure. Incompletely solidified particles 4a,
4b and the like are supplied from the outlet 1a to the side of the upper surface of the granulation plate 24 that moves in the ascending direction. In this case, an enclosure 25 surrounding the granulation plate 24 is fixed or fixed to the granulation plate 24 so that the incompletely solidified granules 4a and 4b do not fall out of the granulation plate 24 even when subjected to centrifugal force. It is. Also, the incompletely solidified granules 4a, 4a move from the upper part of the granulation plate 24 to the side where the surface of the granulation plate 24 descends.
The blade 26 fixed so that the b does not rotate is
Is approaching. The solidified granules 5 fall onto the curing conveyor 2 from the outlet 25a of the enclosure.

The embodiment uses a granulated material carrier which moves from a low place to a high place, and supplies the granulated material to the granulated material carrier, for example, fly ash for kneading residual ash in an incinerator. When the mixture of incompletely solidified granules and fly ash from the solidification kneader is a granulated material, fly ash adheres around the incompletely solidified granules and further collides with the granulated material carrier. There is an effect that granulation is performed.

In the embodiment , since an endless granulation belt is wound around pulleys arranged at an oblique interval, granulation can be performed continuously.

[0024]

According to the first aspect of the present invention, there is provided a solidified granule granulator.
The height distance from the outlet of the fly ash solidification kneader can be adjusted.
Time for incompletely solidified particles to stay on the granulation belt
Can be lengthened and incompletely solidified particles collect fly ash and cement
Amount increases. Also, there is a granulated material carrier inside the cover
Incompletely solidified particles or solidified particles are scattered around
Of the granulated material carrier in the height direction.
Can be adjusted.

[0025] The second invention of the present invention is directed to the first invention.
Because the inclination of the granulation belt can be changed,
Is the distance between the slope and the outlet of the fly ash solidifying kneader in the height direction.
Separation can be changed at the same time as incompletely solidified
The adjustment range that allows longer residence time on the
You.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a perspective view of the solidified granulator of FIG. 1;

FIG. 3 is a perspective view of a support member of the solidified granulator of FIG. 2;

FIG. 4 is a perspective view showing the operation of a solidified granulator.

FIG. 5 is a perspective view of a second embodiment.

FIG. 6 is a front sectional view of a third embodiment.

FIG. 7 is a perspective view of Reference Example 1 .

FIG. 8 is a side view of a conventional example.

FIGS. 9A, 9B and 9C are perspective views showing a granulation experiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fly ash solidification kneader 4a, 4b Incompletely solidified granules 5 Solidified granules 7 Granulation belt 10 Solidified granules granulator

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-35771 (JP, A) JP-B 35-2780 (JP, B1) JP-B-41-14286 (JP, B1) (58) Field (Int.Cl. ⁷ , DB name) B01J 2/26

Claims (2)

(57) [Claims] 1. A fly ash solidifying kneader for kneading granulated material and discharging incompletely solidified granules from an outlet, and a solidified granule disposed below the outlet of the fly ash solidifying kneader to convey the solidified granules. A curing conveyor for curing while the cover is provided between the outlet of the fly ash solidifying kneader and the curing conveyor, and a granulated material carrier is disposed below the outlet of the fly ash solidifying kneader. And
An endless granulation belt whose upper surface is movable from a low place to a high place is wound around at least an upper and lower pulley which is arranged at least diagonally, and either of the pulleys or both pulleys Is a solidified granulator connected to a driving device, wherein the solidified granulator is supported by supporting means capable of adjusting a distance in a height direction between the solidified granulator and a discharge opening of the fly ash solidifying kneader, and is disposed in the cover. A granulator comprising: a solidified granulator. 2. The apparatus according to claim 1, wherein the support means for the solidified granulator can change the inclination of the granulation belt.
The granulation apparatus according to claim 1.