JP3207969U - Dry specific gravity sorter - Google Patents

Abstract

In a dry specific gravity sorting apparatus using a solid-gas fluidized bed, the function of the punching metal can be fully exhibited and excellent sorting can be performed. A dry specific gravity sorter using a solid-gas fluidized bed is configured to supply compressed air from below an air chamber chamber 1 installed below a hopper 5 into which residues are introduced, A canvas is provided on the side, and a support wire mesh is provided further below the canvas. [Selection] Figure 2

Description

  The present invention relates to an improvement related to punching metal of a solid-gas fluidized bed used in a dry sorting apparatus for sorting industrial waste materials and the like.

Industrial waste, for example, construction mixed waste is mainly mixed with earth and sand and combustible materials, and usually sorted by a sorting method using vibration and wind power, heavy materials, combustible materials, earth and sand Sorted into residues. In addition, there is a wet specific gravity difference sorting device, but the equipment is large and water or liquid is used as a medium, so a dryer is required, and it is necessary to treat contaminated water or liquid, which is costly. There are problems such as this.
In any apparatus, the separated product is sent to a secondary treatment corresponding to each purpose, but the problem is particularly the residue, and a fine residue, for example, 5 mm. In the following, 4 mm or less, combustibles are contained in earth and sand by several percent to 20 several percent.

Residues containing such combustibles (reduced heat loss) cannot be used as “backfill material”, and the only landfill disposal is the “managed landfill”.
Under the current law, if the amount of heat loss is 5% or less, it can be disposed of in a “stable landfill” and can be reused as “backfill material”.
And, compared to “managed landfill disposal”, “stable landfill disposal” has a great advantage that its cost is reduced to about 1/7.

Therefore, it has been required to more strictly sort the above-mentioned residues. As part of such technology, unlike the above-described sorting method using vibration and wind, a method using wind (pressurized air) is used to form a solid-gas fluidized bed using the difference in specific gravity of the residue, A technique for separating earth and sand has been proposed.
The following techniques are known for such conventional techniques.

JP2003-300020 JP2007-185621

With the advent of the above-mentioned conventional technology, it has become possible to make it more accurate by downsizing and small energy selection than the conventional technology using vibration and wind power. There was a problem.
One is that the punching metal provided in the air chamber that generates the fluidized bed has a large number of small holes drilled in the flat plate and flows pressurized air from below to flow the residue thrown upward. However, even though the flat plate is perforated uniformly, the upward blow-off is not uniform, and it is difficult to form a smooth flow state over the entire area, so that sorting unevenness occurs and efficiency is improved. It ’s not good.
Secondly, there is a situation in which the upper residue from the perforation leaks downward, and therefore, the smooth flow of pressure air passing through the punching metal is obstructed, resulting in a decrease in sorting performance. That is the point.

  In view of the present situation, an object of the present invention is to enable a sorting device using a solid-gas fluidized bed to sufficiently exhibit the function of the punching metal and perform excellent sorting.

The dry specific gravity sorter according to the present invention is a dry specific gravity sorter using a solid-gas fluidized bed for performing post-treatment of residues sorted by a vibration sieve device in order to achieve the above object. The compressed air is supplied from below the chamber chamber (1), and a vibration motor (8) is installed in the air chamber chamber (1) to apply vibration to the residue. A punching metal (2) is provided inside the air chamber chamber (1), and the residue is made to flow by pressurized air that has passed through the punching metal (2), and layers are formed up and down using the difference in specific gravity. In the dry-type specific gravity sorter that is separated and separated as
A canvas (3) is provided below the punching metal (2), and a support wire mesh (4) is provided further below the canvas (3).
I took the steps.

According to the present invention, by providing the canvas, the flow of pressurized air passing through the small hole of the punching metal is stopped once at the bottom of the canvas, so that the peripheral internal pressure becomes equal and the blowing pressure from the small hole becomes equal. As a result, the spraying pressure on the upper residue is uniform over the entire region, and the stirring flow can be smoothly performed by uniformly colliding with the residue. As a result, the loss of ignition of the separated bottom layer residue can be suppressed to 5% or less, and at least the bottom layer separation residue can be disposed of in a stable landfill site.
Since the canvas is simultaneously positioned below the small hole, it is possible to prevent the residue from dropping downward from the small hole even before the pressurized air is injected or stopped during the operation or during operation. It is. At this time, even if the residue that is about to fall from the small hole enters the small hole, the canvas is sufficiently supported by the metal mesh provided on the lower side of the canvas, and the canvas may be bent. There is no.
As a result, the pressurized air can be blown upward from the small holes of the punching metal uniformly and smoothly, the residue can be efficiently flowed, and the separation action by the formation of the fluidized bed can be accurately performed. Can do it.
Other advantages of the present invention will become apparent from the description of the following examples.

In the present invention, it was found from experiments that the hole diameter of the small holes (7) of the punching metal (2) is most preferably 1 mm and the pitch between the holes is set to 2 to 3 mm.
Further, the canvas (3) is made of a woven fabric having a mesh with a passing air volume of 160 to 210 cm ³ / cm ² / sec, so that a sufficient flow state can be obtained while maintaining the blowing flow rate at a required value. I found that I could do it.

1 is an overall front view of a dry specific gravity sorting apparatus according to the present invention. 1 is a perspective view of a hopper and a chamber in a dry specific gravity sorting apparatus according to the present invention. The partial notch expansion perspective view of the chamber in the dry type specific gravity sorter concerning the present invention.

A preferred embodiment of a dry specific gravity sorting apparatus according to the present invention will be described in detail below with reference to the drawings.
As shown in FIGS. 1 to 3, here, the residue to be selected is construction mixed waste. In other words, these wastes are congars as heavy objects, waste plastics as combustibles, paper scraps, wood scraps, earth and sand as reuse materials, and residues as earth and sand and fine plastics, It consists of wood scraps, paper scraps, gypsum board and so on.

As shown in the figure, the dry specific gravity sorter using a solid-gas fluidized bed for post-treatment of the residue sorted by the vibration sieve device is basically installed in the hopper 5 for feeding the residue and its lower part. The compressed air is supplied from below the air chamber chamber 1, and a vibration motor 8 is laid in the air chamber chamber 1 to apply vibration to the residue. A punching metal 2 is provided inside the chamber 1, and the residue is made to flow by the pressurized air that has passed through the punching metal 2 and separated and separated using a difference in specific gravity so as to form layers vertically. Has been. The vibration motor 8 mainly generates vertical vibrations, but has a known configuration capable of generating horizontal and diagonal vibrations.
Here, the hopper 5 is configured to have an arbitrary size. For example, the hopper 5 is a rectangular parallelepiped having a width of 1,200 mm, a length of 3,000 mm, and a height of 2,110 mm, and is made of a transparent resin cylinder. It consists of a body and steel plate. In the previous demonstration experiment, a cylindrical one having a diameter of 300 mm and a length of 1,000 mm was used.

An air supply device 6 that supplies pressurized air to the chamber 1 is provided. In the case of the rectangular parallelepiped having a width of 1,200 mm, a length of 3,000 mm, and a height of 2,110 mm, the device 6 is supplied with pressurized air of a maximum of 10.0 kPa and a flow rate of 130 m ³ / min. It can be supplied with. Of course, the amount of pressurized air is appropriately adjusted according to the weight of the residue to be added.

  A canvas 3 is provided in close contact with the lower side of the punching metal 2, and a support wire mesh 4 is provided in close contact with the lower side of the canvas 3. The punching metal 2 is made of a steel plate having a thickness of 1 to 2 mm. A plurality of small holes 7 having a hole diameter of 1 mm and a pitch between the holes of 2 to 3 mm are drilled therein. Therefore, the overall aperture ratio of the small holes 6 is about 10 to 23%. Here, the wire mesh 4 uses a metal wire knitted mesh.

The canvas 3 is made of a plain weave of about 1 mm thickness made of polypropylene (polyester), and has a basis weight of 180 to 240 g / m ^2. 160 to 210 cm ³ / cm ² / sec.
The punching metal 2 and the canvas 3 are fixed by bolt connection so as to be sandwiched when the hopper 5 is connected to the lower chamber 1.
According to experiments, the apparatus having the above-described configuration has a residue fractionation processing capacity of 4 m ³ / H (4,000 kg / H as an apparent specific gravity of 1.0).

  In the experiment of the present invention, due to the presence of the canvas 3, the compressed air does not escape immediately from the small hole 7 at the location where the resistance is low below the punching metal 2, but is stopped by the canvas 3, so that the canvas 3, the pressure is uniformly maintained and then blown upward from the small hole 7, so that the blowing pressure and flow rate on the entire surface of the punching metal 2 are made uniform, and as a result, the flow to the residue It can be inferred that the action can be made uniform.

The experiment of the punching metal 2 was performed with the following specifications.
Plate thickness Hole diameter Pitch Aperture ratio (Ratio of hole area to plate area)
1.00mm 1.00mm 3.0mm 10.1%
1.00mm 1.00mm 2.0mm 22.7%
1.50mm 2.00mm 3.5mm 29.6%
2,000 mm 2.50 mm 5.0 mm 22.7%
However, the plate thickness of 1.00 mm, the hole diameter of 1.00 mm, and the pitch of 2.0 to 3.0 mm could form the best stirring airflow.

The experiment on the canvas 3 was performed with the following specifications.
Material Thickness Airflow (cm ³ / cm ² / sec)
Polyester 1.4mm 15
Polypropylene 1.8mm 15
Polyester 0.7mm 1.0-2.0
Polypropylene 1.1mm 1.0-2.0
Polypropylene 0.41mm 160
Polypropylene 0.64mm 210
However, the larger the passing air volume, the better the stirring airflow could be formed.

  The loss of ignition in the bottom layer (layer with large specific gravity) of the residue separated by the experiment was 5.0% or less, which is a smaller value than the conventional residue of several to 20%. It means that the loss on ignition could be separated.

Industrial application fields

  The present invention is a structural improvement that can effectively exert the function of the punching metal in the separation of the residue using the solid-gas fluidized bed. It is effective for the separation and selection of residues generated in the industrial field of Japan, and its application range is wide.

1: Air chamber chamber 2: Punching metal 3: Canvas 4: Wire mesh 5: Hopper 6: Air supply device 7: Small hole 8: Vibration motor

Claims (3)

This is a dry specific gravity sorter using a solid-gas fluidized bed for post-treatment of the residue sorted by the vibration sieve device, compressed from the air chamber chamber (1) placed under the hopper (5) into which the residue is charged. It is configured to supply air, and a vibration motor (8) is laid in the air chamber chamber (1) to apply vibration to the residue. A dry type in which a punching metal (2) is provided, and the residue is made to flow by pressurized air that has passed through the punching metal (2), and a layer is formed vertically using the difference in specific gravity. In specific gravity sorter,
A dry specific gravity sorter characterized in that a canvas (3) is provided below the punching metal (2), and a support wire mesh (4) is provided further below the canvas (3).   The dry specific gravity sorter according to claim 1, wherein the hole diameter of the small holes (7) of the punching metal (2) is 1 mm and the pitch between the holes is set to 2 to 3 mm. The dry specific gravity sorter according to claim 1 or 2, wherein the canvas (3) is formed of a mesh woven fabric having an air flow rate of 160 to 210 cm ³ / cm ² / sec.

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