JP6806615B2 - Treatment method of the object to be processed - Google Patents

Description

The present invention relates to a method for treating an object to be treated, and more specifically, to increase the recovery rate of fine-grained powders and granules contained in the object to be incinerated from industrial waste. Regarding the processing method.

Various types of industrial waste are generally incinerated, and the incinerated product after incineration has traditionally been disposed of in landfills, but in recent years iron has been recovered from the incinerated products, and fine-grained fuel husks are the raw material for cement. It is being reused as. Specifically, the iron content contained in the incinerated product is recovered by a magnetic separator, and after removing lumps such as castings and filter elements contained in the incinerated product, the particle size is obtained by further sieving with a sieving machine. The fine incinerator is reused as a raw material for cement. Such an incinerated product processing system is disclosed in, for example, Patent Documents 1 and 2.

A cylindrical rotary sorter (also referred to as a "thrommel type sorter") is known as a device for separating agglomerates from other incinerators in the pretreatment of incinerated matter. As shown in Patent Document 3, for example, a trommel type sorter is configured to include a cylindrical rotary drum having a large number of olfactory holes on its peripheral surface, and one end of the rotary drum. An inlet is provided on the side, an outlet is provided on the end side opposite to the inlet, and the inlet side is arranged so as to be higher than the outlet side. Then, by rotating the rotating drum that rotates the incinerated material, which is the object to be processed, which is charged from the input port, the powder granules smaller in size than the sieve holes are passed through the sieve holes and dropped to pass through the powder particles and the sieve holes. It is to sieve the lumps that cannot be formed. In addition, the size of the powder granules to be sieved is adjusted by forming the sieving holes in different sizes in stages, such as a small size on the upstream side near the inlet side and a large size on the downstream side. Some have made it possible.

Japanese Unexamined Patent Publication No. 2013-138975 Japanese Unexamined Patent Publication No. 2009-056362 Japanese Unexamined Patent Publication No. 10-272424

In the trommel type sorter, the incinerated material is sorted into metals and fuel shells, and the sieved product is further subjected to a vibrating sieve to perform sieving according to a reference value (for example, φ10 mm), and the sieved product having a diameter of less than φ10 mm. A certain powdery fuel husk is used as a raw material for cement. However, when the powdery and granular fuel husks solidify and exist as large lumps, they are sieved as a sieve product in a trommel type sorter, and the recovery rate of the fuel husks is not good. According to the study by the present inventors, the actual recovery rate of the incinerated product, which is expected to be at least about 65% as the recovery rate of the sieved product having a diameter of less than 10 mm, is only 50% or less. In order to increase the amount of sieved matter having a diameter of less than 10 mm, it can be improved to some extent by selecting the model of the sorter, but that alone does not satisfy the above recovery rate. Further, if an attempt is made to increase the number of sieving products by increasing the pore size of the sieving holes of the sorting machine, there is a disadvantage that the ratio of metals that should originally be sent to the magnetic separator is increased in the sieving products.

Therefore, the present invention provides a method for treating an object to be treated, which can increase the number of sieves in a sorter and a vibrating sieve, and increase the recovery rate of fine-grained powders and fuel shells which are raw materials for cement. The purpose is to provide.

The present invention according to claim 1 for solving the above problems, a particulate said燃殻from the object to be treated comprising a collapsible bulk product燃殻of particulate contained in the incineration residues of industrial waste is solidified In a method for treating an object to be collected as an object, it is a hollow cylinder rotatably arranged and is used for scraping up from an input port for charging the object to be processed to an upstream side within a predetermined range. The subject is covered by a rotary sorter having a cylinder provided with a non-perforated portion having a lifter and no sieve hole and a perforated portion having a plurality of sieve holes having a hole size of φ40 mm on the downstream side. A step of obtaining a sieve product containing the lump product having a diameter of less than 40 mm by primary sieving the processed product, and a roll crusher for crushing the sieve product, wherein the powder and granular product contained in the sieve product are present. solidified collapsible said agglomerates were crushing Suruga, hard-like material hardness equivalent rigid metal strip than the lumps of processing the undersize product by a roll crusher roll gap 6mm to pass without being crushed In the process, the sieved product treated by the roll crusher is further further sieved by a sieve having a pore size of φ10 mm, and the powdered fuel shell of less than φ10 mm, which is the sieved product, is recovered as a cement raw material . Provided is a method for treating an object to be processed, which comprises a process.

In order to solve the above problems, the present invention according to claim 2 is the method for treating an object to be processed according to claim 1 , wherein the secondary sieve is divided into a vibrating sieve upper product and a vibrating sieve lower product by a vibrating sieve. It is characterized by sieving.

In order to solve the above problems, the present invention according to claim 3 is the primary sieve product sieved by the primary sieve in the method for treating the object to be processed according to claim 1 or 2 , and the above two. It is characterized in that the secondary sieve product sieved by the secondary sieve is further separated into a magnetic substance and other substances by a magnetic separator.

According to the method for treating an object to be treated according to the present invention, a rotary sorter is used to sort a mass of fuel shells in which powder particles are solidified so that the sieved product is contained in the sieved product. Of these, collapsible lumps with solidified fuel shells are crushed, but hard ones such as metal are sorted by a roll crusher that allows them to pass through without crushing, and this is further sieved to sieve a size smaller than the specified size. Since the lower material can be reliably recovered, there is an effect that the amount of powdered granules, that is, fine-grained fuel shells can be recovered. This has the effect of increasing the recovery rate of the fuel husk as a raw material for cement from the incinerated incinerated product.

It is a block diagram of the processing system which carries out the processing method of the object to be processed which concerns on this invention. It is explanatory drawing which shows the outline of the sorter and a roll crusher of FIG. It is a front view of a sorter. It is a side view of the sorter shown in FIG. It is a perspective view which shows the main part of a roll crusher. It is a flowchart of one Embodiment of the method of separating the object to be processed which concerns on this invention.

[Processing system configuration]
The method for treating the object to be processed according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of a processing system that implements the method for processing an object to be processed according to the present invention. The illustrated processing system 1 generally comprises a hopper 3 installed in a platform PF for receiving an object 2 loaded on a carrier T and an object 2 supplied via the hopper 3. Conveyors 4 and 5 that convey in a predetermined direction, a sorter 6 that sorts the objects to be processed 2 conveyed by the conveyor 5, and a hopper 7 that receives objects to be processed of a predetermined size or smaller selected by the sorter 6. roll crusher to pass without disintegrable lumps of particulate matter such as燃殻contained in undersize material 2a supplied from the hopper 7 has solidified to crush but hard materials such as metal pieces to grind 8 A vibrating sieve 9 that sifts a roll crusher processed product 2b containing a fuel shell crushed by a roll crusher 8 and a metal piece that has not been crushed into a fuel shell 10 having a size smaller than a predetermined size and a metal piece having a size larger than a predetermined size. A conveyor 11 that conveys a sieve product 2c of a predetermined size or larger sorted by a sorter 6, a conveyor 12 that conveys a sieve product 2d of a predetermined size or larger by a vibration sieve machine 9, and a sieve conveyed by the conveyor 11. A magnetic separator that magnetically sorts the fine material 2c and the vibrating sieve top material 2d conveyed by the conveyor 12 into a ferromagnetic product (magnetic material) 15 such as iron scrap 16 and a weak magnetic product (magnetic material) 14 such as MIX metal 17. It is configured to include 13. In FIG. 1, for convenience of drawing, the conveyor 5 and the conveyor 12 are shown with a large inclination angle, but do not show an actual inclination angle.

[Structure of sorter]
Next, the sorter will be described with reference to FIG. FIG. 2 is an explanatory view showing an outline of the sorter and the roll crusher of FIG. 1, FIG. 3 is a front view of the sorter, and FIG. 4 is a side view of the sorter shown in FIG. Sorter 6 is a so-called trommel type sorting machine, and a substantially cylindrical tubular body 60 having an outlet 6 1 b for discharging the inlet 61a and sieving quality goods introducing an object to be processed 2. The tubular body 60 generally has a non-perforated portion 62 having no sieve holes and a perforated portion 64 which is arranged so as to be continuous with the non-perforated portion 62 and has a large number of sieve holes 63, 63. , It is arranged so that it can rotate forward and reverse using a motor or the like (not shown) as a power source. A large number of sieving holes 63, 63 are bored at regular intervals on the entire peripheral surface of the perforated portion 64, which is a sieving surface. The shape of each of the sieve holes 63, 63 is circular, but the shape is not limited to this.

Further, as shown in FIGS. 3 and 4, a plurality (here, 9 pieces) are erected on the inner peripheral surface at predetermined intervals so that the top portion faces the center side of the tubular body 60 inside the non-perforated portion 62. ) Long plate-shaped lifters 65, 65 are provided. Further, in order to reinforce the tubular body 60, a plurality of frame members 66, 66 made of U-shaped steel or the like are attached along the peripheral surface along the longitudinal direction of the tubular body 60 as shown in FIG. The tubular body 60 is processed into a cylindrical shape having a two-layer structure of an outer layer 67a and an inner layer 67b by a metal material such as a steel plate having wear resistance, corrosion resistance, strength, and the like. The perforated portion 64 and the non-perforated portion 62 both have the same length (for example, 120 cm). The perforated portion 64 and the non-perforated portion 62 are integrally connected by welding or the like so as to be formed by one rotating body. Further, the diameter size of the sieve holes 63, 63 provided in the perforated portion 64 is appropriately set according to the size at which the object 2 to be processed is desired to be sorted, but at least 80% or more of the object 2 to be processed is under the sieve. It is preferable that the size is such that the object 2a is formed. This is because the sieve product 2a is further treated by the roll crusher 8, so that only a relatively large product needs to be removed. In this embodiment, the diameter is set to φ40 mm.

On the other hand, the non-perforated portion 62 is not formed with the sieve holes 63 and 63, and the lifters 65 and 65 are provided on the inner side surfaces thereof as described above, and the lifters 65 and 65 are substantially triangular support plates 68. One side is supported by, 68. The object to be processed 2 thrown into the cylinder 60 is scraped up by the lifters 65 and 65, and by being appropriately agitated, the powdery particles contained in the object to be processed 2 are solidified and disintegrate lumps. That is, the fine-grained fuel shells are solidified to disintegrate, and the powder particles adhering to the metal pieces or the like are shaken off, and the powder particles are sieved as a sieve under the perforated portion 64. At the same time, the lump material can be sorted as a sieve product. Further, the cylinder body 60 is located on the inlet 61a side above the discharge port 61b side in the horizontal direction, and is installed at an angle of 3 to 10 °, for example, and the object to be processed 2 in the cylinder 60. Makes it easier to flow down.

Further, the frame members 66, 66 are manufactured using, for example, U-shaped steel, and in the present embodiment, three frames are used in total. The frame members 66, 66 are arranged between the two layers of the tubular body 60 at intervals of 120 ° with respect to the center of rotation. The lengths of the frame members 66 and 66 are set to be slightly shorter than the length of the non-perforated portion 62.

[Structure of roll crusher]
Next, the roll crusher 8 will be described. FIG. 5 is a perspective view showing a main part of the roll crusher. The roll crusher 8 is processed by arranging a pair of rotating tubular rollers 81a and 81b so as to face each other in the main body 80, and rotating the rollers 81a and 81b inward by a motor (not shown). This is an apparatus for crushing an object by rollers 81a and 81b. In the present embodiment, the gap between the pair of rollers 81a and 81b of the roll crusher 8 can be adjusted to an appropriate size. In this embodiment, the gap between the rollers 81a and 81b is 6 mm. On the outer surface of the rollers 81a and 81b, protrusions (also referred to as "demon teeth") 82 and 82 for facilitating crushing of the charged roll crusher processed product 2b are provided in a pattern of a predetermined length. .. The rollers 81a and 81b may be configured such that grooves 82 and 82 are not provided and grooves are provided at regular intervals in the circumferential direction, or the roller surface may be flattened.

On the other hand, the pair of rollers 81a and 81b of the roll crusher 8 crush the one in which the fuel shell is solidified into a lump, but in the case of a hard one such as a metal piece, the rollers 81a and 81b are not crushed. It is designed to pass through by opening a gap between them. That is, when a material having high hardness is thrown in, either one side or both of the rollers 81a and 81b is moved in a direction away from each other so that the roller 81a and 81b can pass through as they are. As a result, the fuel shell solidified into a lump is crushed, but in the case of a hard material such as a metal piece, it can be passed as it is without being crushed.

[Construction of vibrating sieve]
The vibrating sieving machine 9 sifts the roll crusher processed product 2b containing the fuel husks crushed by the roll crusher 8 and the uncrushed metal pieces and the like by vibration to the husks 10 having a size smaller than a predetermined size and those having a size larger than the predetermined size. .. In the present embodiment, the mesh size of the vibrating sieve 9 is φ10 mm, and the sieve is divided so that the upper part of the sieve is φ10 mm or more and the lower part of the sieve is less than φ10 mm.

[Structure of magnetic separator 13]
The magnetic separator 13 is a device that separates a ferromagnetic product 15 and a weak magnetic product 14 by magnetic force. A ferromagnetic product (magnetic material) 15 such as iron scrap 16 and a weak material such as MIX metal 17 are magnetically processed into a sieve product 2c screened by a sorter 6 and a vibration screen product 2d screened by a vibration sieve machine 9. Sort into magnetic products (magnetic materials) 14.

[Processing method for the object to be processed]
Next, a method for treating the object to be treated according to the present invention will be described with reference to each figure. FIG. 6 is a flowchart of an embodiment of the method for separating objects to be processed according to the present invention. In the following, the upper sieve of the sorter 6 is φ40 mm or more, and the lower sieve is less than φ40 mm. Further, the upper part of the sieve by the vibrating sieve 9 is set to φ10 mm or more, and the lower part of the sieve is set to less than φ10 mm.

First, when the truck T loaded with the object 2 to be processed reaches the platform PF, the object 2 to be processed is transferred to the hopper 3. Then, the object 2 to be processed is transferred to the conveyors 4 and 5 via the hopper 3 and put into the sorter 6 (step S1).

In the sorter 6, temporary sieving between φ40 mm (= trommel under) and φ40 mm or more (= trommel over) of the object 2 to be processed is performed according to the hole size of the perforated portion 64 set in advance (step S2). .. The object 2 to be processed, which is put into the non-perforated portion 62 of the sorter 6, is appropriately agitated by the lifters 65 and 65 provided in the non-perforated portion 62 by the rotation of the tubular body 60. At this time, the collapsible lumps in which the powdery granules are solidified are also appropriately crushed. Then, the object 2 to be processed gradually flows down in the cylinder 60 toward the discharge port 61b side while being rotated and stirred by the lifters 65 and 65, and eventually reaches the perforated portion 64. In the process of passing through the perforated portion 64, the object 2 to be processed has a sieve product 2a having a size smaller than the pore diameter of the sieve holes 63, 63 and a sieve having a size larger than the pore diameter of the sieve holes 63, 63, as shown in FIG. Sifting (temporary sieving) is performed with the upper product 2c. The sieve material 2a falls to the hopper 7, and the sieve product 2c is discharged from the discharge port 61b and transferred to the conveyor 11. Since the pore size of the perforated portion 64 is set to 40 mm, the disintegratable lumpy substance obtained by solidifying the powdery granular matter which has conventionally become the sieve product 2c also increases the ratio of being sieved as the sieve product 2a.

The sieve material 2a having a diameter of less than 40 mm collected in the hopper 7 by the sorter 6 is put into the roll crusher 8 and crushed (step S3). Next, the roll crusher processed product 2b treated by the roll crusher 8 is further sorted by the vibrating sieve 9 based on the secondary sieve content, that is, φ10 mm (step S4). Then, of the roll crusher treated product 2b, the fuel shell 10 having a diameter of less than 10 mm is regarded as a fuel shell product and shipped as a raw material for cement. On the other hand, the vibrating sieve top object 2d having a diameter of 10 mm or more is sent to the magnetic separator 13 by the conveyor 12 (step S4: φ10 mm or more). Further, the sieved product 2c sieved by the sorting machine 6 in step S2 is also sent to the magnetic separator 13 (step S2: φ40 mm or more), and the magnetic sorting process is performed (step S5). The magnetic separator 13 sorts the weak magnetic product 14 and the ferromagnetic product 15. Then, the ferromagnetic product 15 is recovered as iron scrap 16, and the weak magnetic product 14 is recovered as mixed metal (MIX metal) 17. In the present embodiment, the sieve content by the sorting machine 6 is based on φ40 mm, and the sieve separation by the vibrating sieve 9 is based on φ10 mm, but the situation of the object to be processed 2 and the required size of the fuel shell product 10 are used. It can be changed as appropriate according to the above.

Next, the results of Examples and Comparative Examples of the present invention are shown in Table 1. In the example, the above-mentioned processing is carried out. That is, the upper sieve of the sorter 6 is φ40 mm or more, the lower sieve is less than φ40 mm, and the roll crusher processed product 2b obtained by treating the sieve product 2a by the sorter 6 with the roll crusher 8 is sieved by the vibrating sieve machine 9. Is sieved to φ10 mm or more and under the sieve to less than φ10 mm. On the other hand, in the comparative example, the upper sieve of the sorter 6 is φ30 mm or more and the lower sieve is less than φ30 mm, and the sieve product 2a by the sorter 6 is φ10 mm on the sieve by the vibrating sieve 9 as it is without being treated with the roll crusher 8. As described above, the bottom of the sieve is sieved to less than φ10 mm. As is clear from Table 1, in the example, when the input amount of the object to be treated is 100, the recovery rate of the sieved product by the vibrating sieve 9, that is, the fuel shell product is 48% of that of the comparative example. It increased significantly to 80%. Further, in the example, 89% of the object to be treated was sieved as the sieve product 2a by the temporary sieving, but in the comparative example, only 59% was sieved, and the final recovery rate of the fuel shell product. Is only 48%.

As described above, according to the method for treating the object to be processed according to the present invention, the disintegratable lumps in which the powders and granules contained in the object 2 to be processed are solidified are sieved by the sorter 6 so as to be under the sieve. Then, the sieve product 2a is crushed by a roll crusher 8, and the roll crusher processed product 2b is further sieved by a vibrating sieve 9 to obtain a fuel shell 10 having a size smaller than a predetermined size (for example, less than φ10 mm) as a raw material for cement. It has the effect of increasing the recovery rate when recovering as a fuel shell product.

As described above, the preferred embodiment of the present invention has been described in detail, but the present invention is not limited to the specific embodiment, and within the scope of the gist of the present invention described in the claims. Needless to say, various modifications and changes are possible.

In the above-described embodiment, the target is industrial waste containing a large amount of metal as the object to be treated, but other wastes including rod-shaped linear bodies such as crushed metal, contaminated soil, gravel crushed stone, and incinerated ash. It can also be applied to applications such as foreign matter removal.

1 Processing system 2 Processed object 2a Sieve product 2b Roll crusher processed product 2c Sieve product 2d Vibration sieve product 3, 7 Hopper 4, 5 Conveyor 6 Sorter 8 Roll crusher 9 Vibration sieve machine 10 Fuel shell product 11 Conveyor 12 Conveyor 13 Magnetic Separator 14 Weak Magnetic Product 15 Hydraulic Product 16 Iron Scrap 17 MIX Metal 60 Cylinder 61a Input Port 61b Discharge Port 62 Non-Perforated Part 63 Sieve Hole 64 Perforated Part 65 Lifter 66 Frame Material 67a Outer Layer 67b Inner Layer 68 Support Plate 80 Main body 81a, 81b Roller 82 Protrusion

Claims (3)

In a method for treating an object to be treated, which recovers the fuel husks as powder particles from an object to be treated containing a collapsible lump in which powdery and granular fuel husks contained in an incineration residue of industrial waste are solidified.
A hollow cylinder that is rotatably arranged and has a non-perforated portion without a sieve hole provided with a lifting lifter on the upstream side within a predetermined range from the charging port for charging the object to be processed. By primary sieving the object to be processed by a rotary sorter provided with a cylinder provided with a perforated portion having a plurality of sieve holes having a hole size of φ40 mm on the downstream side, the object to be processed is less than φ40 mm. The step of obtaining a sieve product containing the lump product and
A roll crusher for crushing the undersize product, collapsible said lumps of particulate matter contained in the under sieve material has solidified crushing Suruga, hard hard metal pieces considerable hardness than the clot A step of treating the sieved product with a roll crusher having a gap of 6 mm between rolls through which the material is passed without being crushed.
The step of secondary sieving the sieved product treated by the roll crusher with a sieve having a pore size of φ10 mm and recovering the powdered and granular fuel shells having a pore size of less than φ10 mm as a cement raw material .
A method for treating an object to be processed, which comprises. In the method for treating an object to be processed according to claim 1 ,
The secondary sieve is a method for treating an object to be processed, which comprises sieving a vibrating sieve upper product and a vibrating sieve lower product by a vibrating sieve. In the method for treating an object to be processed according to claim 1 or 2 .
The subject is characterized in that the primary sieve product sieved by the primary sieve and the secondary sieve product sieved by the secondary sieve fraction are further separated into a magnetic material and others by a magnetic separator. Processing method of processed material.

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