JPH09206694A - Method for selective treatment of waste and facility therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely separate minerals in flammables and nonflammables and to improve the accuracy of selection by a method in which after waste such as municipal waste and construction waste being crushed roughly, a metal is removed from the waste, minerals in the waste is milled by a rod mill, and then the waste is screened. SOLUTION: Waste such as municipal waste and construction waste is supplied to a crusher 1 to be crushed roughly. Metals such as iron and aluminum are removed by a metal selector 2 in a transfer passage to a rod mill 3. Minerals such as earth, sand, and glass contained in the waste are milled by the mill 3 to the particle size of 5-10mm or less, while flammables, other than minerals, such as plastics, sponge, paper, cloth, and wood keep the size exceeding 5-10mm. The waste discharged from the mill 3 is screened by a sieving machine so that nonflammables of minerals are accurately separated as a minus mesh product, while flammables such as plastics are separated as a plus mesh product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a facility for sorting wastes, and more particularly to a method and facility for sorting wastes such as municipal solid waste and construction waste into incombustibles and combustibles.

[0002]

2. Description of the Related Art Conventionally, this kind of waste sorting method and equipment has been used to remove combustibles by crushing wastes such as municipal waste and construction wastes and then selecting them by gravity. There is known a method for separating and removing metals from incombustibles from which substances have been removed. To carry out this method, as shown in FIG.
The crusher 31 for roughly crushing the waste, and the waste discharged from the crusher 31 are made of plastic, sponge, paper, a piece of cloth,
A wind power sorter 32 for selecting a specific gravity between combustible materials such as wood chips and incombustible materials such as earth and sand, glass, and metal, and a metal sorter 33 such as a magnetic separator for selecting metals from incombustible materials discharged from the wind power sorting machine 32. Those equipped with are known.

[0003]

However, in the conventional waste sorting method and its equipment, although the gravity sorting by the wind power sorter is used for separating the incombustibles and the combustibles, the wastes are discharged from the crusher. Since the waste after coarse crushing has an irregular shape and a range of sizes,
There is a problem that it is difficult to completely separate combustible materials such as plastic from minerals such as earth and sand and glass in non-combustible materials. Therefore, an object of the present invention is to provide a waste sorting method and equipment capable of easily and surely separating a combustible substance and a mineral contained in an incombustible substance, and further significantly improving the sorting accuracy. .

[0004]

In order to solve the above-mentioned problems, the first method for selecting and treating waste according to the present invention is to roughly crush waste such as municipal solid waste and construction waste, and then to remove metal from this waste. Is selectively removed, and the mineral in the waste from which the metal has been removed is selectively ground by a rod mill, and then the waste is sieved. The second waste sorting method is to roughly crush waste such as municipal solid waste and construction waste,
It is characterized in that the minerals therein are selectively ground by a rod mill, metals are selectively removed from the selectively ground waste, and then the waste is sieved. The third waste sorting method is characterized in that, in the first or second method, the selective pulverization is performed while drying the waste. In the coarse crushing, it is preferable that the waste is 100 mm or less in size. On the other hand, the first waste sorting facility is a crusher that roughly crushes waste such as municipal solid waste and construction waste, a metal sorter that sorts metal from the waste discharged from the crusher, and a metal sorter. It is characterized by comprising a rod mill for selectively crushing minerals in the waste from which metal has been removed through the machine, and a sieving machine for sieving the waste discharged from the rod mill. The second waste separation and treatment facility consists of a crusher that roughly crushes waste such as municipal waste and construction waste, a rod mill that selectively crushes the minerals in the waste discharged from the crusher, and a rod mill. It is characterized by comprising a metal sorter for sorting metal from discharged waste and a sieving machine for sieving the metal-removed waste through the metal sorter. Further, the third waste sorting facility is characterized in that, in the first or second facility, a hot air supply source for supplying hot air into the rod mill is provided.
The crusher is preferably capable of crushing waste to a size of 100 mm or less.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing an example of an embodiment of a waste sorting facility according to the present invention. This waste sorting facility is a shredder 1 such as a shredder that roughly crushes waste such as municipal waste and construction waste, and a magnetic separation that sorts metals such as iron and aluminum from the waste discharged from the crusher 1. A metal sorter 2 such as a machine, a rod mill 3 for selectively crushing the minerals in the waste from which the metal has been removed through the metal sorter 2, and a hot air inside the rod mill 3 for drying the wet waste ( A hot air supply source 4 for supplying Max., 120 ° C.) and a sieving machine 5 such as a horizontal sieve for sieving the waste discharged from the rod mill 3 are provided.

[0006] In the waste sorting / processing facility having the above-described structure, after the waste such as municipal waste or construction waste having a size of 200 to 300 mm is supplied to the crusher 1 and roughly crushed to a size of 100 mm or less, Metals such as iron and aluminum are removed by the metal sorter 2 in the transportation route to the rod mill 3. In the waste from which the metal has been removed, minerals such as earth and sand and glass contained therein are selectively crushed by the rod mill 3 to have a particle size of 5 to 10 mm or less, but plastics other than minerals, sponge, paper, cloth Combustibles such as cuts and wood pieces maintain a size exceeding 5 to 10 mm due to their properties. It should be noted that the rod mill is used for selectively crushing minerals such as glass in the waste in other crushers, for example, in a ball mill, the mineral is crushed by the cloth scraps other than the mineral in the waste, the wood chips, etc. Although it is hard to be done, the rod mill has a heavier crushing medium and a larger impact force than a ball mill, etc.
Without blocking the eyes with a piece of wood like a ball mill,
This is because sufficient crushing and smooth discharge are possible.
When the waste is in a wet state during the pulverization by the rod mill 3, hot air is supplied from the hot air supply source 4 into the rod mill 3 to dry the waste. Then, the waste discharged from the rod mill 3 is passed through the sieving machine 5 of 5 to 10 mm, so that incombustibles mainly composed of minerals are increased as undersize products and combustibles such as plastics are increased as oversize products. Sorted with accuracy.

FIG. 2 is a conceptual view showing another example of the embodiment of the waste sorting facility according to the present invention. In this waste sorting facility, a rod mill 3 is arranged after the crusher 1 and a metal sorter 2 is arranged after the rod mill 3, and the arrangement of the metal sorter 2 and the rod mill 3 shown in FIG. 1 is changed. It is a thing. Since other configurations and operational effects are almost the same as those in FIG. 1, the same components and the like are designated by the same reference numerals and the description thereof will be omitted.

Incidentally, in each of the above-mentioned embodiments,
The case of providing the hot air supply source 4 for supplying hot air into the rod mill 3 in order to pulverize wet waste while drying is explained, but the present invention is not limited to this, and the waste is dry. In this case, it is not necessary to perform drying by supplying hot air from the hot air supply source 4.

[0009]

As described above, according to the first and second waste sorting methods and equipment of the present invention, the waste from which the metal has been removed through the metal sorter and the crusher are discharged. It is possible to selectively pulverize the minerals in the incombustibles contained in each waste to be crushed with a rod mill to a particle size of 5-10 mm or less. Thus, the combustible material and the mineral in the incombustible material can be easily and surely separated from each other, and the sorting accuracy can be remarkably improved. Further, according to the third waste sorting method and the equipment therefor, in addition to the effects of the first and second ones, the rod mill is equipped with a drying means, so that the waste is in a wet state. Can be well sorted.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an example of an embodiment of a waste sorting facility according to the present invention.

FIG. 2 is a conceptual diagram showing another example of the embodiment of the waste sorting facility according to the present invention.

FIG. 3 is a conceptual diagram of conventional waste sorting equipment.

[Explanation of symbols]

 1 Crusher 2 Metal sorter 3 Rod mill 4 Hot air supply source 5 Sieving machine

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihide Kamase 1780 Kamitakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries, Ltd. inside the Yachiyo factory (72) Inventor Katsuyuki 1780 Kamitakano, Yachiyo-shi, Chiba Kawasaki Heavy Industries Yachiyo Factory Co., Ltd.

Claims (8)

[Claims] 1. After coarsely crushing wastes such as municipal waste and construction wastes, metals are separated from the wastes, and minerals in the metal-free wastes are selectively crushed by a rod mill,
A method for selecting and treating waste, which comprises sieving the waste afterwards. 2. After coarsely crushing wastes such as municipal waste and construction wastes, the minerals therein are selectively crushed with a rod mill,
A method for selecting and treating waste, which comprises selectively removing metals from waste that has been selectively crushed and then sieving the waste. 3. The method according to claim 1, wherein the selective crushing is performed while the waste is dried. 4. The method for selecting and treating waste according to claim 1, 2 or 3, wherein the coarse crushing makes the waste 100 mm or less in size. 5. A crusher for roughly crushing waste such as municipal solid waste and construction waste, a metal sorter for sorting metal from waste discharged from the crusher, and metal removed through the metal sorter. A rod mill that selectively grinds minerals in waste,
A facility for selecting and treating waste, comprising a sieving machine for sieving the waste discharged from the rod mill. 6. A crusher for roughly crushing waste such as municipal solid waste and construction waste, a rod mill for selectively crushing minerals in the waste discharged from the crusher, and a waste discharged from the rod mill A waste sorting facility comprising a metal sorter for sorting metals and a sieving machine for sieving the waste from which the metals have been removed through the metal sorter. 7. The waste sorting facility according to claim 5, further comprising a hot air supply source for supplying hot air into the rod mill. 8. The crusher is capable of crushing waste to a size of 100 mm or less.
The facility for sorting and processing waste according to 6 or 7.