JP3684464B2 - Foreign matter sorting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to metals that may interfere with the operation of the molding machine out of the waste supplied to the RDF molding machine when converting general waste and industrial waste into solid fuel (hereinafter referred to as RDF). The present invention relates to a foreign matter sorting apparatus used for removing in advance molding incompatibility (hereinafter referred to as foreign matter) mainly composed of incombustibles such as stone, ceramics, and glass.
[0002]
[Prior art]
Most of industrial waste such as general waste and plastic discharged from households is currently incinerated. However, in recent years, from the viewpoint of thermal recycling, it has been required to convert these combustibles into RDF and reuse them as heat sources.
[0003]
In this RDF manufacturing process, if flammable waste mixed with foreign matter is supplied to the RDF molding machine as it is, the foreign matter may interfere with the operation of the molding machine. Therefore, it is necessary to remove metals, stones, earthenware, glass, and the like that are foreign matters in advance in order to prevent damage to the molding machine and to ensure stable operation of the molding machine.
[0004]
Conventionally, various wind sorting devices, metal detectors, and the like have been used as foreign matter sorting devices. The wind sorting apparatus is an apparatus that separates a thing with a large specific gravity and a thing with a small specific gravity in waste using an air current. The metal detector is a device in which a metal detector is installed above the conveyor, detects changes in the lines of magnetic force caused by metal foreign matters in the waste conveyed by the conveyor as an electromotive force, and thereby activates the relay. . However, these devices have the following problems. First, the wind sorter is: In addition to the main body of the sorter, a device such as a fan, a cyclone, a duct, etc. is required, which makes the apparatus large. 2. High running cost There is a problem that it is difficult to scale up. In addition, the metal detector includes: 1. The target is limited to metal foreign objects. 2. It is difficult to adjust detection accuracy for waste. There is a problem that a separate function such as a damper is required.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a foreign matter sorting apparatus that overcomes the above-mentioned problems of a wind sorter and a metal detector.
[0006]
[Means for Solving the Problems]
Foreign matter sorting apparatus according to the invention, waste, an apparatus for separating a foreign substance composed mainly of molding adaptations and incombustible mainly composed of combustible material, the rotor for foreign objects rebound below the waste inlet In the foreign matter sorting apparatus in which the molding conformity discharge port and the foreign matter discharge port are provided at a lower level than the rotor, and the former is provided closer to the rotor and the latter is separated from the rotor. There is a waste input port, and a screw conveyor is horizontally arranged inside it. The shape of the foreign object repulsion rotor is cylindrical and the rotation axis is horizontal and perpendicular to the screw conveyor. repulsion rotor have been rotated at high speed, waste is fed to the upper surface of the rotor of the rotation state from the quantitative waste inlet by the screw conveyor, the peripheral surface of the rotor for a foreign substance repulsion And it is characterized in Rukoto that having a surface sawtooth shape.
[0007]
The foreign object repulsion rotor is made of, for example, stainless steel, and may have a cylindrical shape, a conical shape, or the like. The axis of rotation is usually horizontal. When the amount of processing is large, it is possible to cope with this by increasing the diameter and / or length of the rotor.
[0008]
During operation of the foreign matter sorting apparatus, the foreign matter repulsion rotor is rotated at a high speed. When waste is quantitatively supplied from the waste inlet to the upper surface of the rotating rotor by the screw conveyor, the foreign matter in the waste is mainly composed of hard metal, so the repulsive force with the rotor is large and Since inertia force is large, it is difficult to decelerate with air resistance. As a result, the foreign matter is blown to a position away from the rotor and exits from the foreign matter discharge port to the outside of the apparatus.
[0009]
On the other hand, molding conforming materials mainly composed of combustible materials have a small repulsive force with the rotor and are easily decelerated by air resistance even if they are repelled. Go out of the device.
[0010]
In this way, it is possible to accurately select and collect only the foreign matters that hinder the operation of the RDF molding machine, and it is possible to send only molding conformants mainly composed of combustible materials downward.
[0011]
In addition, since the selected foreign matter has high purity and should not be mixed into the molding-compatible product if the waste is originally collected separately, the amount of waste recovered after removing the foreign matter is reduced and transported, etc. It becomes easy to work. In addition, the foreign matter can be disposed as landfill as it is.
[0012]
【Example】
In FIG. 1, a waste input port (2) is provided on one side of the upper end of the casing (1) of the foreign matter sorting apparatus, and a screw conveyor (3) is horizontally disposed therein. A foreign object repulsion rotor (4) is provided below the waste input port (2). The foreign matter repulsion rotor (4) is made of stainless steel, and its shape is cylindrical, the rotation axis is horizontal, and the direction is perpendicular to the screw conveyor (3). The molding conformity discharge port (5) and the foreign matter discharge port (6) are provided at a lower level than the rotor (4), the former being closer to the rotor and the latter being separated from the rotor.
[0013]
In the foreign matter sorting apparatus having the above configuration, the foreign matter repulsion rotor (4) is rotated at a high speed during its operation. The waste is quantitatively supplied to the upper surface of the rotating rotor (4) from the waste inlet (2) by the screw conveyor (3). The foreign matter in the waste has a large repulsive force with the rotor (4), is blown to a position away from the rotor (4), goes out of the apparatus from the foreign matter discharge port (6), and is collected.
[0014]
On the other hand, the molding conformity mainly composed of combustible material has a small repulsive force with the rotor (4), and is recovered from the molding conformity discharge port (5) located near the rotor (4).
[0015]
FIG. 2 shows a modification of the rotor. In this example, the peripheral surface (8) of the rotor (7) has a sawtooth shape in cross section. As is clear from FIG. 2, the cross-sectional sawtooth shape of the peripheral surface (8) of the foreign object repulsion rotor (4) is such that the tooth tip of the sawtooth is directed in the direction opposite to the rotational direction of the rotor (4). Yes.
[0016]
【The invention's effect】
According to the present invention, it is sufficient that the necessary power of the electric motor for driving the rotor is extremely small as compared with that of the exhaust fan used for the wind sorter or the like, and the running cost can be reduced.
[0017]
In addition, the peripheral surface of the foreign matter repelling rotor of the foreign matter sorting device has a sawtooth cross-sectional shape. During operation of the foreign matter sorting device , the foreign matter repelling rotor is rotated at high speed, and the waste is disposed horizontally. Quantitatively supplied to the upper surface of the rotating rotor from the waste input port by the screw conveyor, and can accurately sort and collect only the foreign matters that hinder the operation of the RDF molding machine. Only the molding conforming product can be supplied to the downstream side where the RDF molding machine is located.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing a foreign matter sorting apparatus according to the present invention.
FIG. 2 is a perspective view showing a modified example of the rotor.
[Explanation of symbols]
1: Casing 2: Waste input port 3: Screw conveyor 4, 7: Rotor for repelling foreign matter 5: Molded material discharge port 6: Foreign material discharge port 8: Peripheral surface with a sawtooth cross section

Claims (2)

A device for separating waste into molding conformables mainly composed of combustibles and foreign materials mainly composed of noncombustibles, and a rotor (4) for repelling foreign matters is provided below the waste inlet (2). The lower part of the rotor (4) has a molding conformity outlet (5) and a foreign matter outlet (6), the former being closer to the rotor (4) and the latter being away from the rotor (4). In the sorting device, a waste input port (2) is provided on one side of the upper end of the casing (1) of the foreign material sorting device, and a screw conveyor (3) is horizontally disposed inside the foreign material repelling rotor (4). The shape is cylindrical and the axis of rotation is horizontal and perpendicular to the screw conveyor (3) .During operation, the foreign object repulsion rotor (4) is rotated at a high speed, and the waste is transferred to the screw conveyor (3 ) by being supplied to the upper surface of the rotor of the rotation state from the quantitative waste inlet (2) (4), the peripheral of the rotor (4) for foreign matters repulsive (8) is characterized by having a cross-section saw-tooth shape, the foreign matter sorting apparatus. Foreign object repulsion rotor (Four) The circumference of (8) The cross-sectional sawtooth shape of the saw blade is the rotor tip (Four) The foreign matter sorting apparatus according to claim 1, wherein the foreign matter sorting apparatus is directed in a direction opposite to a rotation direction of the first and second rotation directions.

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