CN104492792A - Process Method And System For Crushing Leavings - Google Patents

Abstract

The present invention provides a method and system for processing crushed residues, which are used to treat crushed residues more efficiently than before when processing crushed residues in a gasification and melting furnace. The method for processing crushed residues is characterized in that The screening device (20) screens the crushed residues (10), and the screened crushed residues (10a) below a specified size are directly fed into the gasification melting furnace for processing; on the other hand, the screened crushed residues (10a) with a specified size The residue (10b) is pulverized to remove iron and non-ferrous substances, and further pulverized by the pulverization device (7) to a size smaller than the specified size of the screening device (20), and then processed in a gasification melting furnace. The device is structured to include: a screening device (20), an iron removal line (3), a non-ferrous removal line (5), a crushing device (7), and the crushed residue after crushing is sent to the gasification melting furnace. The input device (9) of input.

Description

Method and system for treating crushed residue

This application is a divisional application of a patent application with an application date of December 26, 2007, an application number of 200710194372.2, and an invention title of "processing method and system for pulverized residue".

technical field

The present invention relates to a method and system for treating crushed residues, and more specifically, to crushed residues for efficiently treating crushed residues obtained by crushing industrial wastes such as automobiles, motorcycles, and electrical products in a gasification melting furnace processing methods and systems.

Background technique

Conventionally, industrial waste such as automobiles, motorcycles, and electrical products has been appropriately separated into parts that can be easily sorted, and then recycled. However, although the parts that are difficult to sort contain valuable metals, most of them are recycled through discarding. disposed of in landfill. For example, when disposing of a car, the following process is performed. First, parts that can be used as semi-used parts such as an engine and parts that can be sorted are taken out. Then, the last remaining waste car glass is finely crushed to remove metals, and the remaining material becomes crushed residue called ASR (Automobile Shreddre Residue). The recycling rate of automobiles is about 80% by weight, and the remaining 20% is so-called ASR. Since ASR is mixed with various materials such as plastic, it is difficult to separate, so the processing cost increases. Therefore, since most ASRs are disposed of in landfills, it is desired to reduce ASRs and recover and recycle valuable metals contained therein.

Therefore, the applicant of the present application proposes a method for recovering valuable metals with good quality while suppressing generation of harmful substances and preventing metal oxidation while simultaneously processing both pulverized residue and metal slag. Patent application (JP-A-11-302748 (Patent Document 1)). In addition, a patent application has been filed for an improved technique thereof (Japanese Unexamined Patent Publication No. 2001-41436 (Patent Document 2)). Specifically, the method is called separate recovery, that is, industrial waste such as copper slag and crushed residue is put into the fluidized bed gasifier, and air is blown from the lower part of the gasifier to form a fluidized bed, so that the crushed residue, etc. Gasification of industrial waste, using a gasification furnace to recover the first non-combustibles containing valuable metals, and making the second non-combustibles containing valuable metals rising with the help of air from the lower part of the gasification furnace and in the gasification furnace The pyrolysis gas generated in the furnace is fed into the melting furnace while rotating, and slag containing valuable metals is generated in the melting furnace.

On the other hand, the crushed residue is mainly composed of combustible materials such as petroleum and wood, and its calorific value is about 7000-10000Kcal/Kg. Therefore, it has been proposed to reduce the volume and solidify the pulverized residue so that it can be easily transported and handled (Japanese Patent Application Laid-Open No. 8-1138 (Patent Document 3)). Therefore, the pulverized residue solidification pretreatment device disclosed in Patent Document 3 is characterized in that it has: a rod mill or a ball mill for pulverizing the pulverized residue; A non-ferrous separation device for separating non-ferrous metals from the second processed object, the second processed object is the processed object after the iron is separated from the first processed object.

Similarly, JP-A-11-244838 discloses a method of using crushed residue as a resource. Specifically, all the particles of the crushed residue are sieved and sized to be below the specified particle size, and the sized crushed residue is screened in a zigzag air filter to float light residues such as fibers, light plastics, and rubber. To the top, heavy rubber, plastic, glass and other heavy residues, as well as metals such as iron and non-ferrous metals fall, and the fallen heavy residues and metals are separated into metals and non-metals by the eddy current screening machine for recycling , and the floating light residue is collected by a cyclone, and the collected light residue is compressed and solidified by a volume reduction molding machine to achieve volume reduction molding.

[Patent Document 1] Japanese Unexamined Patent Publication No. 11-302748

[Patent Document 2] JP-A-2001-41436

[Patent Document 3] Japanese Patent Laid-Open Publication No. 8-1138

[Patent Document 4] Japanese Patent Application Laid-Open No. 11-244838

So far, when using a gasification and melting furnace to process the crushed residue, first remove iron with a magnetic separator, then manually select to remove non-ferrous metals, and put all the crushed residue after removing iron and non-ferrous metals It is crushed into a predetermined size by a pulverizer, and then processed in a gasification melting furnace.

However, because the pulverization residue contains materials with relatively small volume specific gravity such as foamed urethane (ethyl) formate (Waretan), synthetic resin, fiber, etc., if the pulverization processing capacity per unit time of the pulverizer is considered on a weight basis, Then the efficiency is not very high. Because the crushed residue also includes finely crushed residue to a considerable extent, if only the large objects are crushed in other ways, compared with the existing method of using the entire amount as the crushing object, it can improve The pulverization processing efficiency, and furthermore, the weight of the pulverized residue that can be put into the gasification melting furnace per unit time also increases.

Therefore, the object of the present invention is to provide a method and system for treating crushed residues, which are used for processing crushed residues after crushing industrial wastes such as automobiles, motorcycles, and electrical products by using a gasification melting furnace. Compared with the past, the crushed residue is processed more efficiently.

It is considered here that Citation Document 4, which treats the pulverized residue with a drum sieve (Tronmel) and pulverizes a large pulverized residue with a crusher (Kratsushaya), is the same as the present invention described later. However, in Cited Document In 4, the crushed residue after crushing and the small crushed residue screened out by the drum sieve are merged to form granules, and then iron and non-ferrous metals are screened out, but such a merge is not performed in the present invention. , In addition, the screening of ferrous and non-ferrous metals is carried out for the crushed residues above the specified size screened out through the drum sieve, and the crushing treatment is carried out after the ferrous and non-ferrous metals have been screened out, The two are different on this point.

Contents of the invention

In order to solve the above-mentioned problems, the first item of the present invention provides a treatment method for crushed residues, which is used to efficiently process the crushed residues after crushing industrial wastes by using a gasification melting furnace. The crushed residue is screened according to the specified size, and the screened crushed residue below the specified size is directly put into the gasification melting furnace for treatment; on the other hand, the screened crushed residue above the specified size is removed from iron, non-ferrous Classes are further crushed by a crushing device to a size below the specified size of the screening device, and then processed in the gasification melting furnace.

In order to solve the above problems, item 2 of the present invention provides a treatment method for pulverized residues, which is used to efficiently process the pulverized residues after pulverizing industrial wastes by using a gasification melting furnace, which is characterized in that it includes: using screening The device screens the pulverized residue according to the specified size, and directly puts the screened pulverized residue below the specified size into the gasification melting furnace for treatment; removes iron from the screened pulverized residue above the specified size Process; a process of further removing non-ferrous metals from the pulverized residue after removing irons in the irons removal process; removing irons and non-ferrous metals in the irons removal process and non-ferrous metals removal process The process of pulverizing the pulverized residue above the specified size into the specified size of the screening device; the process of putting the pulverized residue pulverized by the pulverizing process into the gasification melting furnace for treatment.

In order to solve the above problems, the feature of item 3 of the present invention lies in the processing method of crushed residues described in item 1 and item 2 of the present invention, and it is characterized in that the screening device is a trommel type rotary screen machine, and the screening size is 40mm .

In order to solve the above-mentioned problems, item 4 of the present invention provides a crushing residue processing system for efficiently processing the crushing residue after crushing industrial waste by using a gasification melting furnace, which is characterized in that it is constituted as follows: Including: a screening device, which screens the crushed residue according to the specified size; an iron removal operation line, which removes iron from the screened crushed residue above a specified size; a non-ferrous metal removal operation line, which removes iron from the In the crushing residue, non-ferrous metals are further removed; the crushing device crushes the crushed residue above the specified size after removing iron and non-ferrous metals into a size below the specified size of the screening device; The pulverized residues below the size are put into the gasification melting furnace.

According to the method and system for processing the crushed residues of the present invention, the effect is that instead of crushing all the crushed residues, the crushed residues below a specified size are directly charged into the gasification melting furnace for processing, and Only crushing residues of a predetermined size or larger are crushed, so the efficiency of crushing can be improved, and the processing amount of crushed residues that can be processed in a gasification melting furnace is also increased compared with the prior art.

Description of drawings

FIG. 1 is a block diagram of an embodiment of a crushing residue processing system according to the present invention.

Fig. 2 is a schematic perspective view of a screening device.

Fig. 3 is a flow chart of one embodiment of the processing method of the crushed residue according to the present invention.

In the figure: 1-processing system of crushed residue, 3-iron removal operation line, 3a-magnetic separator, 4-vibrating screen machine, 5-non-ferrous metal removal operation line, 7-crusher, 9-feeding device, 10, 10a to 10e-grinding residue, 20-screening device, 21-rotating drum (drum), 23-hole, 26-inlet, 27-discharge port.

Detailed ways

Hereinafter, the processing method and system of the pulverization residue (Shureddast) according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a crushing residue processing system according to the present invention. First, the processing system of the crushing residue according to the present invention will be described, and then the processing method of the crushing residue according to the present invention will be described.

The crushing residue processing system 1 shown in FIG. 1 includes: a screening device 20 as a screening device for screening the crushing residue 10 into a crushing residue 10a below a predetermined size and a crushing residue 10b above a predetermined size; an iron removal line 3 , which removes iron from the crushed residue 10b that has been screened out with a predetermined size or more; the non-ferrous metal removal operation line 5, which further removes non-ferrous metals from the crushed residue 10c from which iron has been removed; the pulverizer 7, This is a crushing device for crushing the crushed residue 10d of a predetermined size or larger after removal of iron and non-ferrous metals into a predetermined size or smaller than the screening device 20; the input device 9 is for crushing the crushed residue 10a of a predetermined size or smaller And the pulverized residue 10e pulverized into a predetermined size or less is put into the feeding facility for the gasification melting furnace.

Initially, the pulverization residue 10 includes foamed (ethyl) carbamate, synthetic resin, fibers, metals, glass, and wire bundles, which are obtained by crushing industrial waste such as abandoned automobiles with a shredder as described above. wait. The crushing residue processing system 1 includes a platform 51 for receiving a truck 50 loaded with such crushing residue 10 , and a hopper 60 for injecting the crushing residue 10 into the crushing residue processing system 1 . Furthermore, a conveyor belt (conbea) 71 for conveying the pulverized residue 10 thrown into the hopper 60 to the screening device 20 is arranged between the hopper 60 and the screening device 20 . In this embodiment, the conveyor belt 71 is a belt conveyor, but it is not limited to a belt conveyor as long as it can convey the crushed residue 10 , and various conveyor belts such as chain conveyors can be used.

The screening device 20 is a device for screening the crushed residue 10 thrown into the hopper 60 according to its size. Specifically, it is a so-called trommel type screening device as shown in FIG. 2 . That is, the screening device 20 includes a cylindrical rotating drum (drum) 21 that is rotatably arranged with an inclination angle of about 3 to 10°, and a plurality of holes of a predetermined size are formed through the peripheral surface of the rotating drum 21. Section 23. Then, when the crushed residue 10 is injected from the inlet 26 provided on the other end surface of the rotary drum 21 and the rotary drum 21 is rotated, the crushed residue 10 having a diameter smaller than the diameter of the hole 23 passes through the hole 23 and falls. These are collected by the hopper 29a and become the pulverization residue 10a of a predetermined size or less. In addition, the pulverized residue 10 a of a predetermined size or less screened out here is directly charged into a gasification melting furnace (not shown) through the input device 9 and processed.

On the other hand, the crushed residue 10b having a predetermined size or more is discharged from the discharge port 27 provided on the opposite end surface of the rotary drum 21, and becomes the crushed residue 10b having a predetermined size or larger. The pulverized residue 10b having a predetermined size or more is collected by the hopper 29b and then transported to the iron removal line 3 .

Here, it is preferable to set the diameter size of the hole portion 23 of the screening device 20 to 40 mm for screening. Using the above-mentioned screening device 20, the residue after mixing the pulverized residue 10 of 40 mm or less and the pulverized residue 10 of 40 mm or more in a weight ratio of 1:1 (volume ratio 7:3) was divided in the above-mentioned screening device 20. ball), the volume specific gravity of the crushed residue 10 below 40 mm can be increased from 0.255 to 0.344, and the volume specific gravity of the crushed residue 10 above 40 mm can be reduced from 0.255 to 0.202. This is because fine grinding residues 10 are removed and only large grinding residues 10 are distinguished. As a result, the pulverized residue 10 with a size of 40 mm or less that can be processed in the gasification melting furnace does not remain in the pulverizer 7 , so only a part of the pulverized residue 10 with a large size can be processed in the pulverizer 7 . Therefore, compared with the prior art, the processing efficiency of the pulverizer 7 is further improved. According to the size of 40mm ball, the processing capacity can be increased by about 10-20%.

Next, the crushing residue processing system 1 has an iron removal line 3 for removing iron from the crushed residue 10b of a predetermined size or more separated by the screening device 20 . The iron removal operation line 3 is an operation line in which the iron removal operation is performed by the magnetic separator 3 a while conveying the pulverized residue 10 b of a predetermined size or larger separated by the screening device 20 by the conveyor belt 72 . Here, the magnetic separator 3 a is a device for recovering iron contained in the pulverized residue 10 b having a predetermined size or larger by using a permanent magnet or an electromagnet. In the present embodiment, irons are removed by the magnetic separator 3 a passing through the pulverized residue 10 b having a predetermined size or larger conveyed by the belt conveyor 72 .

Next, the crushing residue processing system 1 includes a vibrating screen machine 4 for screening by vibration, and the crushing residue 10c from which iron is removed by the magnetic separator 3a is further classified into rubber, resin, and other residues by the vibrating screen machine 4 . The vibrating screen machine 4 slightly vibrates the vibrating table that has been given a slight inclination to guide the relatively light residues such as rubber or resin contained in the pulverized residue 10b of a predetermined size or more loaded on the vibrating table to the lower side, and the copper-containing Residues such as non-ferrous metals, etc. are induced to the upstream side to be distinguished. Thereby, higher-quality classification can be performed.

Next, the treatment system 1 of the crushed residue has a non-ferrous metals removal line 5, and further removes the non-ferrous metals from the crushed residue 10c from which irons have been removed. The removal of non-ferrous metals is, for example, processing the pulverized residue 10c from which irons have been removed through a rod mill or ball mill not shown, and the resin or glass is pulverized finer. Since the area increases, it can be distinguished by a sieve not shown. In addition, instead of processing these with a sieve, they may be screened by hand, and further, non-ferrous metals may be manually separated and removed from the pulverization residue 10c from which irons have been removed.

Next, the processing system 1 of the crushed residue includes a grinder 7 for crushing the crushed residue 10d of a predetermined size or larger from which ferrous and non-ferrous metals have been removed. The pulverizer 7 pulverizes the pulverized residue 10d having a size larger than a predetermined size after the non-ferrous metal removal line 5 removes iron and non-ferrous metals, and pulverizes the pulverized material into a size similar to that screened by the above-mentioned screening device 20. The crushed residue 10a of the same size or smaller is the same size or smaller. In the present embodiment, it is pulverized to a size of 40 mm or less which is the size sifted by the sifting device 20 . On the downstream side of the non-ferrous metal removal line 5, a hopper 63 for feeding the pulverized residue 10d after the non-ferrous metals are removed by the non-ferrous metal removal line 5, and a hopper for conveying the pulverized residue 10d supplied from the hopper 63 to the pulverizer 7 are provided. The conveyor belt 74 , whereby the crushed residue 10 d is supplied to the grinder 7 . In the pulverizer 7, the moisture contained in the pulverization residue 10d can be removed due to the frictional heat and shear heat generated when pulverization is performed to reduce the volume, and the volume can be reduced to about 1/3. Then, the pulverized residue 10d pulverized to 40 mm or less by the pulverizer 7 and the pulverized residue 10a screened by the screening device 20 are fed into a gasification melting furnace (not shown) by the feeding device 9 and processed.

Next, an embodiment of a preferred crushing residue processing method according to the present invention and the operation of the above-mentioned crushing residue processing system 1 will be described together.

First, the pulverized residue 10 is used for pulverizing industrial waste such as discarded automobiles containing foamed urethane (ethyl) carbamate, synthetic resins, fibers, metals, glass, wire harnesses, etc., with a crusher. The truck 50 is transported to the platform 51 and dropped into the hopper 60, and the processing starts (process S0).

The crushed residue 10 thrown into the hopper 60 is conveyed to the screening device 20 by the conveyor belt 71, and the crushed residue 10 is screened based on a predetermined size (step S1). The screening device 20 is a trommel-type screening device. If the crushed residue 10 is thrown in and the rotating drum 21 is rotated, the crushed residue 10a below the diameter of the hole 23 formed through the side will fall through the hole 23 and be picked up by the funnel 29a. collect. On the other hand, the pulverized residue 10b having a predetermined size or more is discharged from the discharge port 27 of the rotary drum 21, collected by the hopper 29b, and transported to the iron removal line 3. In addition, in the screening here, it is preferable to set the size of the hole portion 23 of the screening device 20 to a diameter of 40 mm, and to perform screening with a limit of 40 mm. Thereby, compared with the prior art as mentioned above, the processing amount of the crushed residue 10 can be increased by about 10 to 20%.

Next, the pulverized residues 10 b of a predetermined size or larger separated by the screening device 20 are sent to the iron removal line 3 . That is, the pulverized residues 10b of a predetermined size or larger separated by the screening device 20 are transported by the conveyor belt 72 and passed through the magnetic separator 3a to remove iron (step S2).

The pulverized residue 10 c from which irons have been removed by the magnetic separator 3 a is then sent to the vibrating screen 4 , and the vibrating screen 4 sorts out residues such as rubber and resin. Relatively light residues such as rubber and resin contained in the pulverized residues 10 b having a predetermined size or larger on the vibrating table are induced downward, and residues containing non-ferrous metals such as copper are induced upstream. Thus, higher-grade classification is performed.

The grinding residue 10c which removes iron is further removed non-ferrous metals (step S3). Removal of non-ferrous metals may be performed, for example, with a rod mill or a ball mill not shown, or by hand.

The pulverized residue 10d from which iron and non-ferrous metals have been removed is sent to the pulverizer 7, and pulverized to a size equal to or smaller than the size sieved by the above-mentioned sieving device 20 (step S4). In the present embodiment, it is pulverized to a size of 40 mm or less which is the screening size of the screening device 20 . At this time, since the frictional heat and shear heat generated during pulverization by the pulverizer can remove the moisture contained in the pulverization residue 10d, the volume can also be compressed by about 1/3.

The pulverized residue 10e pulverized to 40 mm or less by the pulverizer 7 and the pulverized residue 10a screened out by the screening device 20 are simultaneously fed into a gasification melting furnace (not shown) through the feeding device 9 for processing (step S5).

As above, the preferred embodiment of the present invention has been described in detail, but it is not limited to the specific embodiment of the present invention, and various modifications can be made within the scope of the gist of the present invention described in the scope of the claims. deformation and change.

Claims (4)

1. pulverize a processing method for residue, dissolve stove for utilizing gasification and process efficiently by the pulverizing residue after trade waste pulverizing, it is characterized in that,

The screening plant utilizing screening to be of a size of 40mm screens described pulverizing residue, the screened bulk specific gravity going out to be of a size of below 40mm be 0.255 ~ 0.344 pulverizing residue directly drop into gasification and dissolve stove and process;

On the other hand, screened go out screening be of a size of the pulverizing residue of more than 40mm, except de-iron class, non-ferric class, utilize reducing mechanism to be ground into the size of below the described screening size of described screening plant further and bulk specific gravity is 0.255 ~ 0.344, after this dissolve stove with described gasification and process.

2. pulverize a processing method for residue, dissolve stove for utilizing gasification and process efficiently by the pulverizing residue after trade waste pulverizing, it is characterized in that,

Comprise:

The screening plant utilizing screening to be of a size of 40mm screens described pulverizing residue, is that the pulverizing residue of 0.255 ~ 0.344 dissolves stove directly to gasification and drops into the operation carrying out processing by the screened bulk specific gravity going out to be of a size of below 40mm;

From the screened operation going out to be of a size of except de-iron class the pulverizing residue of more than 40mm;

Remove the pulverizing residue after de-iron class from by described iron class removal step, further the operation of removing nonferrous metal class;

The pulverizing residue of more than 40mm will be of a size of after eliminating iron class and nonferrous metal class, below the described screening size being ground into described screening plant and bulk specific gravity is the operation of 0.255 ~ 0.344 by described iron class removal step and described nonferrous metal class removal step;

Pulverizing residue after being pulverized by described pulverizing process is dissolved stove input to gasification and carries out the operation that processes.

3. the processing method pulverizing residue as claimed in claim 1 or 2, is characterized in that, described screening plant is that rotary screen formula rotates screen(ing) machine.

4. pulverize a treatment system for residue, dissolve stove for utilizing gasification and process efficiently by the pulverizing residue after trade waste pulverizing, it is characterized in that,

Consist of,

Comprise:

Screening plant, it pulverizes residue described in size selection according to the rules;

Iron class removing production line, its from screened go out given size more than pulverizing residue except de-iron class;

Nonferrous metal removing production line, it is from the pulverizing residue eliminating iron class, further removing nonferrous metal class;

Reducing mechanism, pulverizing the residue more than given size after eliminating iron class and nonferrous metal class is ground into below the given size of described screening plant by it;

Feeding device, the pulverizing residue being ground into below given size is dissolved stove to gasification and drops into by it.