JPH1099783A - Mixing system large size refuse sorting and treating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to eliminate the remaining of iron and the like in combustibles and to enhance the purity of magnetic materials by surely removing the magnetic materials, i.e., iron and the like failing to be recovered by a primary magnetic separator. SOLUTION: The crushed matter of the mixed system large size refuse is sorted to the magnetic materials and the impurities by the rotary drum type primary magnetic separator 18 built into the terminal section of a belt conveyor 17 for transportation. The magnetic materials and the incombustibles partly intruding therein are supplied to a vibration feeder 19 of a type to make combination use of wind force. The lightweight combustibles in the impurities included into the magnetic materials are sucked and recovered by a collecting machine 14. The magnetic materials from which the combustibles are removed are magnetically recovered by the rotary drum type secondary magnetic separator 23. The relatively heavy combustibles which are the impurities are recovered from a spacing d and are supplied to a rotary sieve type sorting machine, by which the combustibles are sieved to the incombustibles and the combustibles. Both are then recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for sorting large-sized waste.

[0002]

2. Description of the Related Art Conventionally used sorting equipment for combustible oversized refuse, non-combustible oversized refuse, and mixed oversized refuse including non-combustible refuse (crushing and sorting apparatus for pretreatment when waste is incinerated in a fluidized bed). Japanese Patent Application Laid-Open No. 1-1938, filed by the applicant of the present invention, may be mentioned. In FIG. 3, oversized garbage transported by a garbage truck or the like is put into a hopper 1, passed through a supply conveyor 2, a feeder 3, and crushed by a crusher 4. The crushed crushed material is transported by a discharge conveyor 5 and a crushed material transport conveyor 6, and a belt-type primary magnetic separator 7 provided at the end of the conveyor 6 collects and removes magnetic substances such as metal pieces. The remaining crushed material is separated into incombustibles and combustibles by a rotary sieve type sorter (Trommel) 8, the incombustibles are collected, and the combustibles are conveyed by a combustible conveyor 9. The magnetic material is collected by a drum-type secondary magnetic separator 10 incorporated in the furnace, and the combustible material from which the magnetic material has been removed is supplied to a fluidized bed incinerator 11.
It is incinerated at. Numerals 12 and 13 denote a magnetic material hopper and a non-combustible material hopper, respectively. Numerals 14, 15 and 16 denote a cyclone, a dust collector and an exhaust fan, respectively.

[0003]

Therefore, when the combustibles are treated in a fluidized bed incinerator, metal pieces may be present in the combustibles. The reason is that most of the magnetic material in the crushed material is collected and removed by the primary magnetic separator 7, but the amount of crushed waste discharged from the crusher 4 is not constant but has a considerable fluctuation range. In addition, since various kinds of garbage are mixed, a belt-type magnetic separator 7 is usually often used as a primary magnetic separator in order to facilitate passage of these crushed materials. When this magnetic separator is installed, a relatively bulky crushed material having a large size of about 100 to 200 m / m (about 300 m / m in the length direction) is often mixed in the crushed material as described above. The distance between the crushed material conveyor 6 and the magnetic separator 7 is set to about 250 m / m to 300 m / m so that these crushed materials are easily transported. With this setting, the magnetic flux density at a position distant from the magnet (on the side of the conveyor) rapidly decreases, and the magnetic adhesion decreases. Therefore, it is conceivable to use a strong magnet.However, if the magnet is too strong, the belt will be damaged at an early stage due to rapid adsorption. It will be mixed in. It has been found that many uncollected irons are relatively heavy, for example, wowers, motors such as refrigerators, reinforcing bars, and flat steel members.

The primary magnetic separator 7 recovers and removes most of the magnetic material, but the unrecovered crushed material containing iron is put into a rotary sieve-type separator 8 so that the incombustible material under the sieve and the unburned material on the sieve are removed. The mixture is sieved into combustibles, and the combustibles on the sieve are discharged as oversize together with the remaining irons, and are conveyed by the combustibles conveyor 9;
The magnetic material is reliably magnetized and removed by the rotary sieve type secondary magnetic separator 10 at the end of the combustible material conveyor 9, resulting in high purity. It should be noted that the air is blown from a blower (not shown) near the lower part of the primary sorter 7 and inside the sorter 8 to increase the sorting effect. However, impurities such as a vinyl sheet or cloth are entangled with the magnetic substance. Therefore, it is extremely difficult to separate impurities from the magnetic substance during the fall of the magnetic substance that falls well from the primary magnetic separator 7. Therefore, the magnetic substance is recovered while containing impurities, and the purity of the magnetic substance is reduced accordingly. further,
Impurities entangled with the magnetic substance are sometimes separated in the rotary sieve magnetic separator 8 and separated, but are often collected without being sufficiently separated and attached to the magnetic substance.

On the other hand, although not shown, a pull-type (drum-type) magnetic separator in which magnets are incorporated in the pulley (end side) of the crushed material conveyor 6 instead of the belt-type magnetic separator is used. In this case, a relatively heavy magnetic substance is reliably recovered in this case. However, since the thickness of the refuse layer is not constant due to fluctuations in the amount of crushed refuse, iron pieces in the refuse often remain. In this case, particularly, small pieces of iron pieces existing in the upper layer often remain, and the collection rate is said to be lower than that of the belt type. Further, impurities may be collected in a relatively heavy magnetic substance while being entangled.

According to the present invention, there is provided a mixing device capable of reliably removing magnetic materials, that is, irons, which have been recovered from a primary magnetic separator and eliminating irons remaining in combustible materials and increasing the purity of the magnetic materials. An object of the present invention is to provide a system oversized trash sorting apparatus.

[0007]

In order to achieve the above-mentioned object, the present invention provides a mixed-system bulky waste sorting apparatus, comprising: a rotary drum built in a terminal end portion of a conveyor belt conveyor for crushed mixed-size bulky waste; The magnetic material and impurities are separated by a primary type magnetic separator, and the incombustible material partially mixed with the magnetic material is supplied to a vibratory feeder combined with a wind power, and the lightweight combustible material in the impurities entrained in the magnetic material is removed by the wind power. It floats and separates by the air introduced into the combined type vibratory feeder, and it is sucked and collected by the collector,
The magnetic material from which the lightweight combustible material has been removed is magnetically attached and collected by a rotary drum type secondary magnetic separator arranged with a predetermined gap at the end of the vibrating feeder combined with wind power, and a relatively heavy combustible impurity. The material is recovered from the gap, and the impurities from the rotary drum type primary magnetic separator are supplied to a rotary sieve type separator to be sieved and collected as incombustibles and combustibles. As a result, the combustibles are reliably recovered and removed from the magnetic substances, and the combustibles have a high purity, and the magnetic substances also have a high purity combustibles.

Further, a crushed material of the mixed bulky waste is separated into a magnetic material and an impurity by a rotary drum type primary magnetic separator built in an end portion of a conveyor belt conveyor, and an incombustible material partially mixed with the magnetic material. Is supplied to the wind-powered vibration feeder, the light combustibles in the impurities entangled in the magnetic material are floated and separated by air introduced into the wind-powered vibration feeder, and the light-weight combustible material is suctioned and collected by the collector. The magnetic material and the relatively heavy combustible material, which are combustible materials removed and impurities, are separated and collected by a rotary drum type secondary magnetic separator arranged at a terminal end of the combined use wind type vibration feeder via a discharge chute, Impurities from the rotary drum type primary magnetic separator are supplied to a rotary sieve type separator to be sieved and collected as incombustibles and combustibles.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In addition, the same thing as FIG. 3 is demonstrated using the same code | symbol. FIG. 1 is a flow chart showing a typical example of a mixed bulk waste sorting apparatus.
Is a hopper, 2 is a feed conveyor, 3 is a feeder, 4 is a crusher, 5 is a discharge conveyor, 6 is a first (crushed material) conveyor,
Reference numeral 17 denotes a conveyor, 18 denotes a drum-type primary magnetic separator incorporated in the end of the conveyor 17, 8 denotes a rotary sieve-type separator (Trommel), and the size of the sieve mesh is set to about 20 to 30 m / m 2. 19 is a vibrating feeder combined with wind power,
Air is blown in by a blower 21 from the lower part of 0. Reference numeral 22 denotes an exhaust port.
(In the illustrated case, it is a cyclone, but it may be a combination of a cyclone and a dust collector.)
Reference numeral 23 denotes a drum-type secondary magnetic separator, which is disposed at a predetermined interval d between the secondary magnetic separator and the vibrating feeder 19 combined with wind power. 24,
25, 26 and 27 are hoppers. 18 is a conveyor 17
A rotary drum type magnetic separator comprising a rotary drum instead of the pulley on the end side and a rotary magnet incorporated in the rotary drum. Reference numeral 23 denotes a rotary drum type magnetic separator including a rotary drum and a fixed magnet incorporated in the rotary drum.

In the above, the oversized refuse introduced into the hopper 1 is conveyed by the conveyor 2, pushed into the crusher 4 via the feeder 3, crushed by the crusher 4, and the crushed material is conveyed by the conveyor 6 to be conveyed by the conveyor 6. At the end of 17, the magnetic material is demagnetized by the primary magnetic separator 18. At this time, since the primary magnetic separator is of a drum type, magnetic substances (irons) regardless of size are magnetically collected. In particular, massive magnetic substances such as motors and compressors are also reliably adsorbed. The remaining crushed material (impurities) is put into a rotary sieve-type sorter 8, where it is sieved into combustibles on the sieve and incombustibles below the sieve.
The incombustible material below the sieve is stored in the hopper 25. The magnetic material magnetized by the primary magnetic separator 18 is sent to a vibrating feeder 19 combined with wind power. At this time, there are impurities entangled with the magnetic material, that is, light combustibles and some combustibles (impurities) that have entered. These magnetic and combustible materials are conveyed by the vibration of the wind-powered vibrating feeder 19, and the air sent from the blower 21 blows up the perforated plate 20, so that lightweight combustible materials are separated from the magnetic material and float, and the air exhaust 16 Is sucked through the exhaust port 22 and collected by the collector 14.
The magnetic material from which the light combustible material has been removed is magnetically collected by a drum-type secondary magnetic separator 23. At this time, impurities that are not adsorbed, that is, relatively heavy combustibles, fall directly through the gap d. Therefore, both the combustible material and the magnetic material have extremely high purity. Furthermore, since a magnetic substance is hardly mixed into the impurities supplied to the rotary sieve type sorter, the magnetic substance does not catch on the sieve of the rotary sieve type sorter.

As shown in FIG. 2, a chute 28 may be provided between the vibrating feeder 19 combined with wind power and the secondary magnetic separator 23 of a drum type. In this case, since there is no gap d, the entire amount including the magnetic substance falls onto the drum-type secondary magnetic separator 23, where it is separated into the magnetic substance and the relatively heavy combustible substances as impurities. This method can reduce the capacity of the secondary magnetic separator 23 when relatively heavy combustible materials are small.

[0012]

As described above, the present invention has the following advantages. The crushed material of the mixed bulky garbage is separated into magnetic substances and impurities by a rotary drum type primary magnetic separator built in the end portion of the conveyor belt conveyor, and the non-combustible substances mixed with the magnetic substances are combined with wind force. The lightweight combustible material in the impurities supplied to the feeder and entrained in the magnetic material is floated and separated by air introduced into the vibrating feeder combined with wind power, and is suction-collected by a collector to remove the lightweight combustible material. The magnetic material is magnetically collected by a rotary drum type secondary magnetic separator arranged at a terminal end of the combined use wind type vibration feeder with a predetermined gap, and a relatively heavy combustible material as an impurity is collected from the gap. Along with, the impurities from the rotary drum type primary magnetic separator were supplied to a rotary sieve type sorter to screen and collect incombustibles and combustibles.
In particular, magnetic substances such as irons remaining in combustible materials or plastics can be completely removed. Therefore, when combustibles and plastics are incinerated or converted to fuel, troubles such as the blockage of the incombustibles discharge mechanism in the incinerator or the molding machine are drastically reduced, and stable operation becomes possible. In addition, the purity of the magnetic substance that is to be recycled becomes extremely high.

Further, the crushed material of the mixed-system bulky waste is separated into magnetic substances and impurities by a rotary drum type primary magnetic separator built in the end portion of the conveyor belt conveyor, and non-combustible substances partially mixed with the magnetic substances. Is supplied to the wind-powered vibration feeder, the light combustibles in the impurities entangled in the magnetic material are floated and separated by air introduced into the wind-powered vibration feeder, and the light-weight combustible material is suctioned and collected by the collector. The magnetic material and the relatively heavy combustible material, which are combustible materials removed and impurities, are separated and collected by a rotary drum type secondary magnetic separator arranged at a terminal end of the combined use wind type vibration feeder via a discharge chute, Since the impurities from the rotary drum type primary magnetic separator are supplied to the rotary sieve type separator and sieved and collected as incombustibles and combustibles, the purity of combustibles and magnetics can be significantly increased. It can be small the capacity of the secondary magnetic separator 23 with.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a mixed-system bulky waste sorting apparatus according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing another example of the mixed bulky waste sorting apparatus according to the embodiment of the present invention.

FIG. 3 is an overall configuration diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 6 Conveyor 8 Rotating sieve sorter 14 Collector 16 Suction exhauster 17 Conveyor 18 Rotary drum type primary magnetic separator 19 Combined wind power type vibratory feeder 20 Perforated plate 21 Blower 22 Exhaust port 23 Rotary drum type secondary magnetic separator

Claims (2)

[Claims] 1. A rotary drum type primary magnetic separator built in the terminal end of a conveyor belt conveyor for separating the crushed mixed bulk waste into magnetic substances and impurities, and incombustible substances partially mixed with the magnetic substances. Is supplied to the wind-powered vibration feeder, the light combustibles in the impurities entangled in the magnetic material are floated and separated by air introduced into the wind-powered vibration feeder, and the light-weight combustible material is suctioned and collected by the collector. The magnetic material from which combustibles have been removed is magnetically collected by a rotary drum type secondary magnetic separator provided with a predetermined gap at the end of the combined wind-type vibration feeder, and relatively heavy combustibles as impurities are removed. A large-sized mixed system, wherein impurities from the rotary drum-type primary magnetic separator are supplied to a rotary sieve-type separator to be sieved and collected as incombustibles and combustibles. Sorting equipment. 2. A crushed mixed refuse is separated into a magnetic substance and an impurity by a rotary drum type primary magnetic separator built in an end portion of a conveyor belt conveyor, and an incombustible substance partially mixed with the magnetic substance. Is supplied to the wind-powered vibration feeder, the light combustibles in the impurities entangled in the magnetic material are floated and separated by air introduced into the wind-powered vibration feeder, and the light-weight combustible material is suctioned and collected by the collector. The magnetic material and the relatively heavy combustible material, which are combustible materials removed and impurities, are separated and collected by a rotary drum type secondary magnetic separator arranged at a terminal end of the combined use wind type vibration feeder via a discharge chute, A mixed-system bulky waste sorting apparatus, wherein impurities from the rotary drum type primary magnetic separator are supplied to a rotary sieve type sorter to be sieved and collected as non-combustibles and combustibles.