JP4286990B2 - Processing equipment for particulate matter with contaminants - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a processing apparatus for a granular material to which a contaminant is attached for realizing detoxification of the granular material to which a contaminant such as contaminated soil or incinerated ash is attached.
[0002]
[Prior art]
Conventionally, combustibles such as garbage that cannot be recycled are mainly incinerated in a stoker-type incinerator or a fluidized-bed incinerator, and are carried out as incineration ash to a waste disposal site where they are buried. The actual incineration ash contains metal scraps, glass or ceramic pieces and earth and sand that have been incinerated with the above combustible materials, so the components of incineration ash include various metals, silica, alumina, Lime etc. are mixed. Such incineration ash is a large amount of waste, and because hazardous substances such as heavy metals and dioxins generated in the incineration process are attached to the incineration ash, a method for reducing the volume and detoxification of the incineration ash or Establishment of reuse technology is desired.
Methods for detoxifying harmful heavy metals such as lead, zinc, copper and cadmium contained in incineration ash include (1) melt solidification, (2) cement solidification, (3) chemical treatment, (4) acid and other There are stabilization by a solvent, (5) carbonation treatment, (6) water washing and the like. Among these, the most reliable method is the melting and solidification of (1), in which the incinerated ash is melted at a high temperature of about 1500 ° C. or higher and then discarded in a waste disposal site or crushed and reused as fine particles. This processing method is currently in practical use. In this treatment method, since heavy metals are contained in the melt, it is said that the heavy metals do not elute even when the melt touches water. The cement solidification of (2) has a fatal disadvantage that the amount of waste increases because cement is put into the incineration ash. In addition, the incineration ash treated by mixing cement becomes strongly alkaline, and there is a high risk that lead and the like are eluted. In the chemical treatment of (3), pH adjustment is important, but since the substances contained in incineration ash are not constant and diverse, pH adjustment is difficult, and if it is inappropriate, there will be no effect of adding chemicals. Has been. Stabilization with acid or other solvent in (4) stabilizes in a state in which heavy metals remain, so it is difficult to prevent elution for a long period of time. The carbonation treatment (5) is not practical because it is difficult to maintain and is complicated. It is said that water washing in (6) can remove heavy metals relatively easily if it does not become an acidic environment due to acid rain, etc., but its effect has only been confirmed with powdered fly ash. As in the case of incinerated ash, a sufficient effect cannot be expected for heavy metals and dioxins attached to a granular material in an aggregated state.
In addition, since the above-mentioned melt-solidification has a high treatment temperature of incineration ash, it can be detoxified by thermally decomposing dioxins, so at present, it is said that the treatment by this melt-solidification is the most effective. This melting and solidification has become the mainstream of incineration ash treatment methods.
[0003]
However, over the long term, the possibility of elution of heavy metals contained in the melt embedded in the disposal site cannot be denied even in the case of melting and solidifying. In addition, in melting and solidification, in order to melt the incineration ash at a high temperature, a large facility such as a melting furnace is required, and a large amount of fuel is required, so that the construction cost and processing cost of the facility are high. There is a point. Therefore, the volume of waste can be reduced by removing recyclable stones, sand, fine particles, etc. after removing hazardous materials such as heavy metals and dioxins before disposing of incineration ash at the disposal site. The establishment of technology to achieve this is desired.
[0004]
On the other hand, in recent years, it has been regarded as a problem that soils in the vicinity of factories such as chemical factories and metal smelting factories are contaminated with heavy metals, organochlorine compounds or oily components. In addition, since the crude oil is attached to the soil on the beach contaminated with crude oil that has flowed into the sea due to a marine accident, etc., and the excavated soil that is transported when tunneling the ground where the crude oil is present, it becomes difficult to treat it. There are often. Furthermore, soil contaminated with problematic pollutants (contaminated soil) includes soil contaminated by the incineration ash described above.
For such contaminated soil, establishment of a technique for removing the contaminants and extracting stones, sand, fine particles and the like and reusing them is desired.
[0005]
In general, it is said that dioxins adhering to the incineration ash are relatively strongly adhering to the surface of the granular material having a size of 2 mm or less in the incineration ash. Therefore, if the particles having a size of 5 mm or more in the incinerated ash are classified and the dioxins that are relatively weakly adhered to the surface of the particles are removed, the particles are harmless and can be reused. Conceivable. However, from the method of separating the incinerated ash such that the granular materials are in an aggregated state without destroying the individual granular materials, or a granular material having a size of 2 mm or less with relatively strong adhesion of dioxins. The method for releasing dioxins has not been proposed by the inventors.
Furthermore, since the incineration ash is a soft tissue, it is difficult to remove dioxins attached to the incineration ash with a general crusher. For example, when the incineration ash is pulverized using a ball mill or the like, the incineration ash The granular material is also made finer, and the granular material to which the dioxins are attached cannot be separated, which makes it difficult to reduce the volume.
On the other hand, in the contaminated soil, although there are few parts in which the granular bodies are in an aggregated state, the contaminants such as heavy metals and oily substances adhering to the granular bodies have a very small particle size. Similarly, it is difficult not only to remove the contaminants with a general crusher, but also the particulate matter of the contaminated soil is made finer, making it difficult to separate the contaminants.
[0006]
By the way, JP-A-8-164363 discloses a crusher that removes sharp corners such as stones in dredged materials without crushing dredged soil, clay, etc., and crushes clots, sand clumps, etc. Has been. 7A and 7B are views showing the configuration of the crusher 10, wherein FIG. 7A is a side view and FIG. 7B is a cross-sectional view taken along line AA of FIG. The crusher 10 is attached to the inner peripheral surface along the axial direction and has a cylindrical rotary drum 6 having a plurality of outer blades 6W protruding in the center direction, and is attached to the outer peripheral surface along the axial direction along the radial direction. The rotor 7 has a plurality of inner blades 7 </ b> W protruding to the inside of the rotary drum 6 and is eccentrically attached to the inside of the rotary drum 6. An annular gear 6 a provided on the outer periphery of the rotary drum 6 is attached to the rotor 7 by the motor 8. The attached rotating shaft 7a is rotated in opposite directions by the driving mechanism 7b, and the input material such as clay put in the crusher 10 is subjected to compression and shear stress to crush the input material, The crushed material is polished by mutual friction between the crushed inputs. The crushing process by the crusher 10 is performed dry or wet when grinding crushed stone, and when the earth and sand such as dredged soil including gravel and clay is refined, it is added to the input material. While doing. Further, the magnitude of the stress acting on the input material is mainly adjusted by the interval between the rotating drum 6 and the rotor 7 (the eccentricity of the rotor 7) and the respective rotational speeds of the rotating drum 6 and the rotor 7.
[0007]
[Problems to be solved by the invention]
However, the crusher 10 discloses an example of crushing dredged soil containing gravel, stones, etc., but it is agglomerated like incinerated ash by burning organic matter sources such as garbage and combustibles. Suggesting how to separate the granular materials without destroying the above granular materials, and how to separate the heavy metals and dioxins adhering to the granular materials in the incinerated ash to render the incinerated ash harmless It has not been done.
Furthermore, in the crusher 10, when the treatment material is contaminated soil to which a pollutant having a large viscosity such as carbon or oil is adhered, or heavy metals as contaminants adhere strongly to individual granular materials. In such a case, it is difficult to effectively remove the contaminants adhering to the particles.
[0008]
The present invention has been made in view of the conventional problems, and while finely pulverizing the granular material adhered to pollutants such as contaminated soil and incinerated ash, the pollutants are efficiently separated and removed, Furthermore, it aims at providing the processing apparatus of the granular material to which the pollutant adhered which can recycle the harmless granular material from which the said pollutant was isolate | separated.
[0009]
[Means for Solving the Problems]
Book Wish The processing apparatus of the granular material to which the pollutant of Claim 1 adhered is, A granular material processing apparatus comprising a first-stage finer means, a second-stage finer means and a separation means, wherein the first-stage and second-stage finer means are each along the inner circumferential surface along the axial direction. A cylindrical rotary drum having a plurality of outer blades attached in the center direction and a plurality of inner blades attached to the outer peripheral surface along the axial direction and projecting in the radial direction. A rotor that is eccentrically attached to the rotating drum, and that rotates in the opposite direction to the rotating drum, Processing gap The gap between the rotor and the rotating drum The granulated material to which the pollutant charged in is attached is subjected to compression and rubbing force between the granular materials while adding water to separate the granular materials into independent granular materials. Crushing treatment, the separation means is Granules having a diameter greater than or equal to a predetermined diameter between 5 mm and 10 mm among the granules discharged from the finer means in the previous stage And above Separation of granular material smaller than granular material The latter finer means has a gap between the rotor and the rotary drum set narrower than the previous finer means, and is inserted into the gap between the rotor and the rotary drum, which is a processing gap. The the above Separated by separation means Smaller granular material In addition, while adding water, the force of compression and rubbing between the granular materials is applied to separate the granular materials into independent granular materials, and the contaminants adhering to the surface of the granular materials are separated. Crushing and peptizing It is what I did.
In addition, compressive stress is applied to the granular material to which the pollutant is adhered, and the granular material to which the aggregated pollutant to which a large number of granular materials are adhered is attached to the granular material, which is performed by the above-mentioned fine granulating means. In the following, the process of separating into fine particles that are almost independent of each other without being broken and then refining them is referred to as a crushing process. Further, the contamination applied to the surface of the granular material is increased by increasing the stress applied to the granular material, causing the frictional force between the granular materials to act, and causing mutual polishing by friction between the granular materials. Hereinafter, the process of separating the substance is referred to as a peptization process.
[0010]
The processing apparatus of the granular material to which the pollutant according to claim 2 is attached is selected from the smaller granular materials. Consists of one or both of heavy metals and dioxins Contains pollutants Mu Classification means for classifying the particle pieces and harmless fine particle pieces having a size larger than that of the fine particle pieces is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of a processing apparatus for granular materials to which contaminants are attached according to Embodiment 1 of the present invention. In the figure, reference numeral 1 designates a primary refining machine 11 which is a first refining means for hydrolyzing a granular material to which a pollutant, which is a processing material that has been charged, adheres, and coarsely crushing the granular material. And secondary granulation, which is a second granulation means for adding water to the granule that has been crushed by the primary granulator 11 and for pulverizing and peptizing the granule. A fine granulating apparatus having a machine 12, a receiving hopper for feeding granular material to which contaminants are attached, and 14 a large-sized granule discharged from the discharge port 11a of the primary fine granulating machine 11. A mesh for classification of about 30 mm for capturing solids such as metals and foreign substances, 15 separates and separates particles having a diameter of 5 mm or more from the particles that have passed through the mesh 14 and 5 mm or less Separating means for delivering the granular material to the secondary atomizer 12, 16 is a hydrocyclone or thickener Comprising a classification means such as a tank, a classification means for classifying the various sizes granular material from within the slurry granules delivered from the secondary comminution machine 12. Reference numeral 17 denotes a water supply unit that supplies treated water to the above-described fine granulating apparatus 1 and the classifying unit 16, and 18 denotes a sewage treatment unit that purifies the treated water discharged from the classifying unit 16.
[0012]
FIG. 2 is a diagram showing an example of the configuration of the fine granulator 1. The fine granulator 1 is composed of a primary fine granulator 11 and a secondary fine granulator similar in configuration to the conventional crusher 10 described above. 12 are built in one shell 2 and are operated by a common power machine 3. The conditions of pulverization and peptization in the primary fine granulator 11 and the secondary fine granulator 12 are as follows. Each granule is separated without breaking, and the conditions are set such that heavy metals or dioxins adhering to the granule in the granule are separated from the granule. Further, 4 is a processing material input port for introducing contaminated soil or incinerated ash, etc., which are processing materials, and 5 is a pulverizing / disassembling step by step in the respective processing gaps of the primary granulator 11 and the secondary granulator 12. This is a processing material discharge port for discharging the glued processing material. It should be noted that the outlet to the separating means 15 and the inlet from the separating means 15 provided in the atomization apparatus 1 are omitted.
As shown in FIG. 3 (a), the primary granulator 11 that performs coarse crushing processing on the particulate matter to which the contaminants are attached reduces the eccentric amount of the rotor 7, and the rotating drum 6 and the rotor 7 Interval D ₁ Is relatively wide and the rotation speed is low. Further, in the secondary granulator 12 that performs the process mainly for peptization on the granular material, as shown in FIG. 3B, the eccentric amount of the rotor 7 is increased and the rotary drum 6 and the rotor are increased. Interval D with 7 ₂ And the rotation speed is increased.
[0013]
In the primary pulverizer 11 or the secondary pulverizer 12, as shown in FIG. 4, the granular material S to which contaminants put in the gap between the rotary drum 6 and the rotor 7, which is a processing gap, adheres. In addition to being scraped upward by the outer blade 6W of the rotary drum 6 and pulled down by the inner blade 7W of the rotor 7, a shear stress acts on the granule S together with a compressive stress, and the granule S is crushed. -Peptized.
That is, as shown in FIG. 5 (a), the granular materials p of the granular materials to which the granular materials are adhered to each other at the fixing surface r and adhered to the aggregated state are adhered to each other. However, compressive stress and shear stress act on the large-sized granular material p, but the aggregated granular materials are separated from the fixing surface r and are refined into almost independent fine granular materials p. As shown in FIG. 5 (b), heavy metal or dioxin adhered to the surface of each granular material due to friction between the granular materials p acting on the granular materials p. Particulates q of contaminants such as a kind are separated and separated from the granular material p (peptization). The contaminant q is attached not only to the surface of the granular particles, but also to the fixing surface r that is the surface of each granular material p (see FIG. 5A). Therefore, at the time of crushing, some of the contaminants q adhering to the surface of the granular particles may be peeled off, but most of them are separated from the surface of the granular material p during the peptization process. The Some of the large-sized granules are crushed and finely divided.
At this time, treated water from the water supply unit 17 is supplied to the primary finer 11 and the secondary finer 12 through a water supply port (not shown). Since the granular material to which the pollutant charged into the atomizing apparatus 1 adheres is crushed and peptized in a state in which this treated water is added, among the separated pollutants, heavy metals and dioxins Dissolves in the treated water or floats as fine particles.
[0014]
Next, taking a case where the processing material is incinerated ash as an example, a method for processing a granular material to which contaminants have adhered by the above processing apparatus will be described.
First, the incinerated ash charged into the receiving hopper 13 is charged into the primary atomizer 11 from the processing material inlet 4 of the atomizer 1. In the primary fine granulator 11, the incineration ash mixed with the treated water is coarsely crushed, and fine particles such as dioxins adhering weakly to the surface of the incinerated ash are peeled off and suspended in the treated water. In addition to dissolving heavy metals that dissolve easily in the treated water, the incinerated ash is separated from the incinerated ash of the primary refining machine 11 while separating the incinerated ash to which the granular bodies are fixed without destroying the granular bodies. It is moved downstream and sent to the separating means 15. At this time, since the stress applied to the incinerated ash is set to be sufficiently lower than that of the above-described crusher 10, granular materials such as earth and sand and ceramic pieces mixed in the incinerated ash are discharged without being crushed.
[0015]
Dioxins adhering to incineration ash are generally said to be adhering to particles having a size of 2 mm or less in the incineration ash, so particles having a size of 5 mm or more in the incineration ash are harmless. It is believed that there is. Therefore, as the separating means 15, a device that separates particles having a size of 5 mm or more in the incineration ash, for example, a sorting vibration screen of about 5 mm, is used to screen the particles having a size of 5 mm or more from the incineration ash. Separated and sieved incineration ash of 5 mm or less is sent to the secondary finer 12. On the other hand, the granular material of about 5 mm to 30 mm is carried out from the separating means 15 and reused or discarded.
[0016]
Since the incinerated ash that has passed through the separating means 15 is approximately 5 mm or less in granular form, the secondary atomizer 12 has a narrow interval between the rotary drum 6 and the rotor 7 and is rotated at a high speed, and the incinerated ash is removed. While separating into finer granular materials, or refining some of the larger granular materials, and separating fine particles of heavy metals and dioxins that adhere strongly to the incineration ash by friction between the granular materials The incineration ash is moved downstream. The incinerated ash that has been crushed and peptized by the secondary finer 12 is sent to the classifying means 16 from the treatment material discharge port 5 and classified into various sizes of granular material. The heavy metals and dioxins separated from the granular material are sent to the classification means 16 together with the treated water for processing, or sent to the sewage treatment section 18 via the classification means 16 for processing.
[0017]
The classifying means 16 classifies various sizes of granular materials such as fine granular materials, which are components of sand, fine sand, and ash, from mud incinerated ash containing granular materials of 5 mm or less. The fine particles of about 20 μm or less classified by the classification means 16 are regarded as fine particles containing a large amount of dioxins, and are subjected to a treatment such as melting and solidifying. On the other hand, the treated water containing the eluted heavy metals is subjected to chemical treatment and the like in the sewage treatment unit 18 to treat and purify the heavy metals and then reused as circulating water. In addition, mud containing particles having a particle size of about 20 μm or more is reused because heavy metals and dioxins are removed and detoxified.
[0018]
The treatment method of the contaminated soil is the same as in the case of the incinerated ash, but it seems that the soil particles are rarely agglomerated, so both the primary and secondary granulators 11 and 12 The peptizing action shown in FIG. In the case of contaminated soil containing incinerated ash, the primary pulverizer 11 performs coarse pulverization, and the secondary pulverizer 12 performs pulverization and peptization.
[0019]
Embodiment 2. FIG.
FIG. 6 is a diagram showing a processing flow of the incinerated ash continuous processing system according to the second embodiment of the present invention. In the second embodiment, the same granulating apparatus 1 as that of the first embodiment is used. The incineration ash that was put in and out was continuously processed to make the incineration ash finer, and harmful substances in the incineration ash were efficiently removed to recycle the innocuous particulates that were discharged. is there.
First, the incinerated ash charged into the receiving hopper 13 is conveyed by a belt conveyor and charged into the primary atomizer 11. In the primary atomizer 11, the treated water from the secondary treated water tank 53, which will be described later, of the water supply unit 17 is added to the incinerated ash, and the incinerated ash is roughly crushed, and the incinerated ash has various sizes. In addition, the dioxins and heavy metals that are weakly adhering to the surface of the incinerated ash are separated while floating or dissolved in the treated water, and the incinerated ash is moved downstream to remove the primary fine particles. It discharges from the discharge port 11a of the granulator 11. In the primary atomizer 11, the interval between the rotary drum 6 and the rotor 7 is wide and the rotation is at a low speed, so that solids such as large metals and foreign substances are discharged without being crushed. The large solid matter is captured and removed by a classification net 14 of about 30 mm provided at the discharge port 11a, and is carried out by a belt conveyor. On the other hand, the incinerated ash that has become a granular body of about 30 mm or less is sieved by the primary sorting vibration screen 20 of about 5 mm to 10 mm (for example, 10 mm). The screened incineration ash of 10 mm or less is sent to the secondary fine granulator 12 after removing metal pieces in the incineration ash in the magnetic metal removing machine 21. On the other hand, a granular material of about 10 mm to 30 mm is carried out by a belt conveyor and reused or discarded. Note that water is supplied from the water supply unit 17 to the primary sorting vibration screen 20, and the water that has passed through the primary sorting vibration screen 20 is sent to a first feed sump 23 described later. The primary sorting vibration screen 20 is a means corresponding to the separation means 15 of the first embodiment.
[0020]
Since the incinerated ash that has passed through the primary sorting vibration screen 20 has a granular body of approximately 10 mm or less, the secondary atomizer 12 adds the treated water from the water supply unit 17 to the incinerated ash and rotates it. Heavy metal and dioxins that adhere strongly to the incineration ash by narrowing the gap between the drum 6 and the rotor 7 and increasing the rotation speed, and causing the incineration ash to undergo mutual polishing mainly by friction between the granular materials. The incinerated ash is moved to the downstream side while being removed, and sent to the secondary sorting vibration screen 22 from the discharge port 12a of the secondary granulator 12.
The secondary sorting vibrating screen 22 reliably screens particles having a size of 5 mm or less from the incinerated ash, such as a sand content of 5 mm or less discharged from the secondary sorting vibrating screen 22, finely divided ash particles, or the like. The mud incineration ash containing the granular material is temporarily stored in the first feed sump 23 and then classified into various sizes of granular material by the classifying means 16. Further, the granular materials mainly composed of gravel of about 5 mm to 30 mm and fine ceramic pieces that are sieved by the primary sorting vibrating screen 20 and the secondary sorting vibrating screen 22 are carried out and reused or discarded.
[0021]
Next, the classification process in the classification means 16 will be described in detail.
The mud incineration ash containing granular material of 5 mm or less stored in the first feed sump 23 is sent to the first hydrocyclone 30 and classified. In the first hydrocyclone 30, particles having a size of about 100 μm or less are suspended in the treated water and separated. The treated water containing particulate matter of about 100 μm or less discharged from the upper part of the first hydrocyclone 30 is temporarily stored in the first feed sump 23 and then sent to the second feed sump 33. On the other hand, the slurry containing the granular material having a particle diameter exceeding 100 μm discharged from the bottom of the first hydrocyclone 30 is sent to the first spigot tank 31 and then about 100 μm or more by the first dehydration vibrating screen 32. The granular material mainly composed of sand is separated and sent to the second feed sump 33.
Similarly, the incinerated ash stored in the second feed sump 33 and having a granular size of about 100 μm or less is converted into 20 to 100 μm fine sand by the second hydrocyclone 34 and the second dewatering vibrating screen 36. They are classified into main granular materials and fine particles of 20 μm or less. That is, the treated water containing fine particles of about 20 μm or less discharged from the upper part of the second hydrocyclone 34 is temporarily stored in the second feed sump 33, and then passed through the waste treatment trommel 37 to the thickener tank 40. Sent to. On the other hand, the slurry containing particulate matter having a particle size exceeding 20 μm discharged from the bottom of the first hydrocyclone 30 is sent to the second spigot tank 35, and then the second dehydration vibrating screen 36, Granules mainly composed of fine sand of about 20 μm or more are separated and sent to the thickener tank 40.
[0022]
In the thickener tank 40, the treated water containing fine particles of about 20 μm or less and the muddy incineration ash are slowly rotated in the tank, and solid-liquid separation is performed to agglomerate and precipitate solids such as granules. Since the heavy metal separated from the incineration ash is dissolved or floating in the supernatant of the thickener tank 40 as described above, it is sent to the primary treatment tank 50 of the sewage treatment unit 18 for processing. In the primary treatment water tank 50, the heavy metals are separated from the treatment liquid by forming an insolubilized salt of the heavy metals by adding a chelating agent or the like to insolubilize the heavy metals.
On the other hand, the slurry-like incinerated ash that has settled at the bottom of the thickener tank 40 is stored in the first slurry tank 41, and then, after removing fine particles such as dioxins in the centrifuge 42, the second slurry It is sent to the tank 43 and stored. Hazardous sludge containing a large amount of fine particles such as dioxins separated by the centrifuge 42 is discarded after being subjected to treatment such as melting and solidification. On the other hand, since the slurry stored in the slurry tank 43 has been detoxified by removing heavy metals and dioxins, it is sent to the dehydrator 44, and a dehydrated cake is produced from this slurry by a filter press (not shown). Can be reused.
[0023]
The water dehydrated by the dehydrator 44 is sent to the filtered water return tank 51 and temporarily stored. After that, the heavy metals are insolubilized in the primary treatment water tank 50 and then sent to the liquid filtration device 52. In the liquid filtration device 52, the treated water is filtered with an adsorbent such as activated carbon to remove and purify heavy metals and dioxins. The purified treated water is sent to the secondary treated water tank 53 which is a water supply unit. The treated water sent from the thickener tank 40 to the primary treated water tank 50 is also purified by the liquid filtration device 52 and then sent to the secondary treated water tank 53. The treated water returned to the secondary treated water tank 53 is mixed with fresh water for replenishment and supplied again to the primary fine granulator 11, the secondary fine granulator 12, the primary sorting vibration screen 20, and the like.
[0024]
Although the incinerated ash treatment system has been described in the second embodiment, the contaminated soil can be efficiently removed of contaminants attached to the soil particles by the same treatment system as the above treatment system. It is possible to extract and reuse stones, sand, fine particles, etc. in contaminated soil.
[0025]
As described above, according to the invention described in claim 1, In the granular material processing apparatus provided with the finer means in the former stage, the finer means in the subsequent stage, and the separating means, the finer means in the former stage and the latter stage are respectively attached to the inner peripheral surface along the axial direction. A cylindrical rotating drum having a plurality of outer blades projecting in the center direction and a plurality of inner blades attached to the outer peripheral surface along the axial direction and projecting in the radial direction, and rotates inside the rotating drum. A rotor that is mounted eccentrically with respect to the drum, and that rotates in the opposite direction to the rotating drum, Processing gap The gap between the rotor and the rotating drum The granulated material to which the pollutant charged in is attached is subjected to compression and rubbing force between the granular materials while adding water to separate the granular materials into independent granular materials. Crushing treatment, the separation means is Granules having a diameter greater than or equal to a predetermined diameter between 5 mm and 10 mm among the granules discharged from the finer means in the previous stage And more than the above granular material Separates small particles The latter finer means has a gap between the rotor and the rotary drum set narrower than the previous finer means, and is inserted into the gap between the rotor and the rotary drum, which is a processing gap. Separated by the separation means Smaller granular material In addition, while adding water, the force of compression and rubbing between the granular materials is applied to separate the granular materials into independent granular materials, and the contaminants adhering to the surface of the granular materials are separated. Crushing and peptizing Since it did in this way, the granular material by which the largest particle size was controlled can be processed in the subsequent fine graining means. Therefore, it is possible to efficiently perform crushing and peptization of the granular material to which the contaminant is attached, and to facilitate classification of the granular material. Furthermore, the separated granule having a diameter of 5 mm or more is harmless and can be reused.
[0026]
According to the invention described in claim 2, from the smaller granular material, Consists of one or both of heavy metals and dioxins Contains pollutants Mu Since the particle means and the harmless fine particle pieces larger in size than the fine particle pieces are classified, the harmful fine particles containing the pollutants are removed, so the detoxified larger one Can be reused as a recyclable resource such as a dehydrated cake, and can have a significant effect on detoxification and volume reduction of the granular material to which contaminants adhere.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a processing apparatus for a granular material to which contaminants are attached according to Embodiment 1 of the present invention.
FIG. 2 is a side view showing the means for refining according to the first embodiment.
FIG. 3 is a diagram showing setting conditions of the finer means of the first embodiment.
FIG. 4 is a diagram for explaining the crushing and peptizing action of the first embodiment.
FIG. 5 is a diagram for explaining the crushing and peptizing action of the first embodiment.
FIG. 6 is a diagram showing a processing flow of a continuous processing system for incinerated ash according to Embodiment 2 of the present invention.
FIG. 7 is a diagram showing the structure of a conventional crusher.
[Explanation of symbols]
1 Atomizer, 2 shell, 3 power machine, 4 processing material inlet,
5 Processing material discharge port, 6 rotating drum, 6W outer blade, 7 rotor,
7W Inner blade, 11 Primary granulator, 12 Secondary granulator,
13 receiving hopper, 14 mesh, 15 separating means, 16 classifying means,
17 Water supply section, 18 Sewage treatment section, 20 Primary sorting vibration screen,
21 Magnetic metal removal machine, 22 Secondary sorting vibration screen,
23 first feed sump, 30 first hydrocyclone,
31 first spigot tank, 32 first dewatering vibrating screen,
33 second feed sump, 34 second hydrocyclone,
35 second spigot tank, 36 dewatering vibrating screen,
37 Garbage disposal trommel, 40 thickener tank,
41 first slurry tank, 42 centrifuge,
43 second slurry tank, 44 dehydrator, 50 primary treatment tank,
51 Filtration water return tank, 52 Liquid filtration device, 53 Secondary treatment water tank.

Claims (2)

A granular material processing apparatus comprising a first-stage finer means, a second-stage finer means, and a separation means, wherein the first-stage and second-stage finer means are each along the inner circumferential surface along the axial direction. A cylindrical rotary drum having a plurality of outer blades attached in the center direction and a plurality of inner blades attached to the outer peripheral surface along the axial direction and projecting in the radial direction. A rotor that rotates eccentrically with respect to the rotary drum, and the finer means in the preceding stage is put into a gap between the rotor and the rotary drum as a processing gap. The smashing process of separating the granular material into independent granular materials is performed by applying a force of compression and rubbing between the granular materials while adding water to the granular material to which the contaminated substances are attached. , it is discharged from the preceding grain refining means From the granules, predetermined separating the small granules of size granules and the upper Symbol granules size than is larger than the diameter, the subsequent grain refining means between 5mm~10mm diameter, The gap between the rotor and the rotary drum is set to be narrower than the finer means in the previous stage, and the size separated by the separation means is inserted into the gap between the rotor and the rotary drum as a processing gap. While applying water to the smaller granular material , the force of compression and rubbing between the granular materials is applied to separate the granular materials into independent granular materials and adhere to the surface of the granular materials. An apparatus for processing granular materials with attached pollutants, characterized by performing crushing and peptizing treatment to separate the pollutants. From the smaller granules of the size, and heavy metals or including fine grain pieces any contaminants consisting of one or both of dioxins, magnitude and greater harmless fine pieces than the fine pieces 2. The apparatus for processing a granular material to which contaminants adhere according to claim 1, further comprising a classifying means for classifying.

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