JPH0565220B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pellet manufacturing device, and in particular, to pelletizing which makes it easy to handle dust, sludge, slurry, etc. collected by air pollution control devices and water treatment. The present invention relates to a pellet manufacturing apparatus.

[Prior Art] FIG. 3 is a diagram for explaining a conventional method for producing pellets. In FIG. 3, raw materials and additives are put into a bag mill 1, mixed while pouring water, kneaded by a rotary mill 2, and pelletized by a bread granulator 3.

As a pelletizing technique, in addition to the example shown in FIG. 3, there is a method in which raw materials and additives are kneaded in a back mill while pouring water, and then granulated by an extrusion molding machine.

[Problems to be Solved by the Invention] However, in any of the above-mentioned methods, the water conditioner adheres to the stirring blades or the inner wall of the device at the water injection part during mixing and kneading, and gradually grows over time, resulting in poor efficiency. Therefore, it is necessary to mix the ingredients below the appropriate moisture content and granulate them using a pan granulator while pouring water. For this reason, a lot of dust is generated, and if water is poured incorrectly, a lot of deposits will build up inside the device, eventually making it impossible to operate. Normal operation cannot be performed unless all of these deposits are removed, so the drawback is that it takes a long time to become popular.

Therefore, the main object of the present invention is to provide a pellet manufacturing apparatus that can perform pelletization extremely efficiently and can be operated unmanned.

[Means for Solving the Problems] The present invention is a pellet manufacturing device that crushes, mixes, and kneads dry raw materials, wet raw materials, additives, moisture regulators, etc. to form pellets, and has a medium built therein. , dry raw materials, wet raw materials, additives, moisture regulators, etc. are input, and vibration is applied to the whole to crush, mix, and knead. a lower drum that generates pellets by adhering and rolling the agglomerated particles that have fallen from the falling section by vibrating the whole, an upper drum, and a lower drum. It is configured to include a vibrating means for vibrating the entire body.

[Function] In the pellet manufacturing apparatus according to the present invention, raw materials, additives, etc. are charged into the upper drum, the upper drum is vibrated, and the medium performs pulverization, mixing, and kneading to generate aggregate particles. The aggregated particles fall onto the lower drum, and in response to the vibrations of the lower drum, the aggregated particles adhere to each other and roll to form pellets.

[Embodiment of the Invention] Fig. 1 is an external view showing an embodiment of the present invention, in particular, Fig. 1a is a front view, and Fig. 1b is a side view.

First, the configuration of an embodiment of the present invention will be described with reference to FIG. The pellet manufacturing equipment is
Mainly the upper drum 5, lower drum 6 and vibrator 9
This is a double-barrel vibratory mill consisting of: An input port 4 for inputting raw materials is formed in the upper drum 5, and a rod is housed inside the upper drum 5 as a medium. The upper drum 5, the lower drum 6, and the vibrator 9 are mounted on a base 8 by a spring 7.
It is structured so that it floats from the ground and vibrates easily. The vibrator 9 causes the upper drum 5 and the lower drum 6 to generate circular vibrations by synchronizing the circular motion generated by motors provided on the left and right sides of the upper drum 5 and the lower drum 6 with a timing belt. .

Now, add the dry raw materials, wet raw material additives, moisture regulator, etc. according to the proper mixing ratio from the input port 4 to the upper drum 5.
When the material and medium in the upper drum 5 are thrown into the shaker, due to the circular vibration generated by the vibrator 9, the raw materials and the medium in the upper drum 5 move violently as if shaking a shaker.
Causes the phenomenon of internal rotation. As a result, impact, shear, friction, etc. occur between the raw material and the medium, the raw material and the drum wall, the medium and the drum wall, the medium and the medium, etc.
They are mixed and kneaded in an extremely short period of time, and excess water within the particles comes out to the surface of the particles and acts as a cohesive force, causing grain growth. In this way, aggregated particles are generated within the upper drum 5, and the generated aggregated particles fall into the lower drum 6 via the falling section 10.

Since no medium is stored in the lower drum 6, the circular vibration of the lower drum 6 causes water to float on the surface of the agglomerated grains due to the rotational force of the vibration, causing the agglomerated grains to stick to each other and roll and grow. do. However, if there is little moisture on the surface of the aggregated particles, the particles will become small.
If there is too much, the particles will become large, so in order to keep the particle size within a certain range, measure the discharged particles instantaneously with an infrared moisture meter and adjust the moisture conditioner according to the deviation from the standard water. can be manufactured. In this way, the pellets produced within the lower drum 6 are discharged to the outside through the discharge port 11.

FIG. 2 is a diagram showing another embodiment of the present invention, in particular, FIG. 2a shows a front view, and FIG. 2b shows a side view. In the example shown in FIG. 2, a vibrator 17 is provided between the upper drum 13 and the lower drum 14, and the vibrator 17 moves the upper drum 13 and the lower drum 14 in a circular motion by the driving force of a motor 18. It vibrates. Also in this embodiment, the upper drum 13, the lower drum 14, and the vibrator 17 are suspended from the base 16 by the spring 15, and the upper drum 13 is provided with the input port 12.
The aggregated particles generated in the upper drum 13 are transferred to the falling part 19.
and falls to the lower drum 14 through the lower drum 1.
The pellets produced within the chamber 4 are discharged to the outside from the discharge port 20.

Next, in the embodiment shown in FIG. 1, an example of actual pellet production will be explained. From each hopper, 100 kg of electric furnace dust is collected using a quantitative feeder.
H, muddy bituminous coal 20Kg/H, pulp waste liquid 15/H from the pulp waste liquid tank is charged from the input port 4 to the upper drum 5 having a capacity of 15, and kneaded by circular vibration by the vibrator 9. Then, the kneaded product was granulated into pellets using the circular vibration of the vibrator 9 in the lower drum 6 having a capacity of 25 mm. The produced pellets have a moisture content of 9.8% and a diameter of 4 m/mφ to 8
90% of the size is m/mφ, and the compressive strength is 1.5
Kg/green pellets of 6 m/mφ were obtained, and the dry pellets had a dry strength of 14 kg/dry pellets and were good enough to be reused for scouring.

Next, an example of actual production of pellets in the embodiment shown in FIG. 2 will be explained. Municipal incineration ash 300Kg/H, cement 30Kg/h from each hopper with quantitative feeder
Kg/H, water 50 by metered supply pump from water tank
/H shown in Figure 2. Upper drum 1 with a capacity of 25
3 and kneaded by circular vibration of the vibrator 17,
The kneaded product was pelletized in a lower drum 14 with a capacity of 50 using circular vibration from a vibrator 17. The produced pellets have a moisture content of 16% and a diameter of 2m/mφ~6
90% of the pellets have a size of m/mφ, and the compressive strength is 1Kg/raw pellets of 6m/mφ.
2Kg/6m of pellets when left in the air for a day
After leaving it for one week, the pellet weight became 11 kg/pellet 6 m/mφ, and the strength was comparable to that of gravel.

In the embodiments shown in FIGS. 1 and 2, the lower drums 6 and 14 are constructed with a single barrel, but the lower drums 6 and 14 are not limited to this.
It is also possible to increase the capacity by providing two of each in parallel and forming a rectangular configuration.

[Effects of the Invention] As described above, according to the present invention, agglomerated grains are generated in the upper drum using circular vibration by a vibrator, and then circular vibration is applied again to the aggregated particles in the lower drum to produce pellets. This makes it possible to achieve homogeneous mixing even when raw materials with extremely different properties (high moisture, low moisture, muddy, dry powder) are blended. Even if agglomerated raw materials are mixed in, it can be made fine and uniform. The moisture deviation of the kneaded product is extremely reduced, and pellets with extremely uniform moisture distribution can be produced. In addition, it is possible to densely pack the crushed particles of the raw material to be processed and increase the bulk specific gravity, while at the same time forming a uniform water film on the particle surface, making it possible to obtain high-strength pellets with low moisture content compared to other pellet manufacturing methods. I can do it. In addition, operation management requires only inspections, allowing continuous operation for long periods of time, and any residue remaining when stopped can be removed by continuing to operate without adding raw materials, eliminating the need for special cleaning personnel. . Furthermore, since the kneading action occurs throughout the drum, there is no dead space like in rotary mills, and the capacity is 20 to 50 times that of rotary mills, making it possible to produce ultra-large volumes of pellets that were previously impossible. Become.

[Brief explanation of the drawing]

FIG. 1 is an external view of one embodiment of the present invention.
FIG. 2 is an external view of another embodiment of the invention.
FIG. 3 is a diagram for explaining a conventional pellet manufacturing method. In the figure, 4 and 12 are input ports, 5 and 13 are upper drums, 6 and 14 are lower drums, 7 and 15 are springs, 8 and 16 are bases, 9 and 17 are vibration exciters,
10 and 19 are falling parts, and 11 and 20 are discharge ports.

Claims (1)

[Scope of Claims] 1. A pellet manufacturing device that crushes, mixes, and kneads dry raw materials, wet raw materials, additives, moisture regulators, etc. to form pellets; Wet raw materials, additives, moisture regulators, etc. are input, and vibration is applied to the whole to perform pulverization, mixing, and kneading, and an upper drum for producing aggregated particles. A falling part for dropping the aggregated particles; a lower drum that vibrates as a whole to cause the aggregated particles that have fallen from the falling part to stick to each other and roll to form pellets; and the upper drum and the lower drum as a whole. A pellet manufacturing device equipped with a vibration means for vibrating pellets.