JP2000197879A - Apparatus for treating particulate material to which pollutant is adhered - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finely divide a particulate material to which a pollutant such as pollutant soil or incinerating ash is adhered and to efficiently separate the pollutant to remove the same and to reutilize the harmless particulate material from which the pollutant is separated. SOLUTION: A particulate material to which a pollutant is adhered subjected to rough crushing treatment by a finely dividing means 11 of a front stage is sent to a separation means 15 to be separated into a large particulate material with a particle size of 5-10 mm and a particulate material smaller than this particulate material and the separated smaller particulate material is charged in a finely dividing means 12 of a post stage to separate the pollutant strongly adhered to the surface of the particulate material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating particulate matter to which contaminants are adhered for realizing detoxification of the particulate matter to which contaminants such as contaminated soil and incineration ash are attached.

[0002]

2. Description of the Related Art Conventionally, combustible materials such as garbage that cannot be recycled are mainly incinerated in a stoker-type incinerator or a fluidized-bed incinerator, carried out as incinerated ash to a waste disposal site and buried. The actual incineration ash contains metal scraps, glass or pottery shards, earth and sand, etc., which are incinerated with the above combustibles.
Various metals, silica, alumina, lime, etc. are mixed.
Such incinerated ash has a large amount of waste, and heavy metals and harmful substances such as dioxin generated in the incineration process adhere to the incinerated ash. The establishment of a reuse technology is desired. Methods to render harmful heavy metals such as lead, zinc, copper, and cadmium contained in incinerated ash harmless include (1) melt solidification, (2) cement solidification, (3) chemical treatment, (4) acid and other Stabilization with a solvent, (5) carbonation treatment, and (6) water washing. Of these, the most reliable method is the solidification of (1), which is a method of melting incinerated ash at a high temperature of about 1500 ° C or higher and then discarding it at a waste disposal site or pulverizing it and reusing it as fine particles. This processing method is currently in practical use. In this treatment method, since the heavy metals are sealed in the melt, it is said that the heavy metals do not elute even when the melt contacts water.
The cement solidification of (2) has a fatal disadvantage that the amount of waste increases because cement is put into incinerated ash. In addition, the incineration ash treated by the incorporation of cement has a high alkalinity and has a high risk of elution of lead and the like. In the chemical treatment of (3), pH adjustment is important, but it is difficult to adjust the pH because the substances contained in the incineration ash are not constant and various, and if it is inappropriate, there is no effect of adding the chemical, so it is questionable. Have been. The stabilization of (4) with an acid or other solvent is carried out in a state in which heavy metals remain, so that it is difficult to prevent elution over a long period of time. The carbonation treatment of (5) is difficult to maintain and, furthermore, impractical due to the complicated equipment. (6) water washing
It is said that heavy metals can be removed relatively easily if the environment does not become acidic due to acid rain, but the effect has only been confirmed with powdered fly ash. Sufficient effects cannot be expected on heavy metals and dioxins adhering to granular materials in a state of aggregate. Further, in the above-mentioned melt-solidification, since the processing temperature of incinerated ash is high, dioxins can be decomposed by thermal decomposition, and at present, this melt-solidification treatment is said to be the most effective. This melting and solidification is the mainstream of incineration ash processing methods.

However, in the long run, even in the case of melt-solidification, the possibility that heavy metals contained in the melt buried in the disposal site are eluted cannot be denied.
In addition, in the solidification, in order to melt incinerated ash at high temperature,
Since large equipment such as a melting furnace is required and a large amount of fuel is required, there is a problem that equipment construction costs and processing costs are high. Therefore, before removing the incinerated ash to the disposal site, after removing harmful substances such as heavy metals and dioxins, the volume of waste can be reduced by extracting reusable stones, sand, fine particles, etc. It is hoped that the establishment of technology to achieve this will be established.

On the other hand, in recent years, it has been considered that soil near factories such as chemical factories and metal refining factories is contaminated with heavy metals, organic chlorine compounds, oily components, and the like. In addition, the treatment of the soil on the beach contaminated with crude oil spilled into the sea due to a marine accident or the excavated soil carried out due to the excavation of the tunnel on the ground where crude oil exists is difficult because the crude oil adheres to it. There are often. Further, the soil (contaminated soil) to which the pollutant in question is attached includes the soil contaminated by the incineration ash. For such contaminated soil, the above contaminants are removed and stone, sand,
It is desired to establish a technique for extracting and reusing fine particles and the like.

In general, it is said that dioxins adhering to incinerated ash are relatively strongly attached to the surface of granular material having a size of 2 mm or less in the incinerated ash. Therefore, if the granular material having a size of 5 mm or more in the incineration ash is classified and the dioxins adhering relatively weakly to the surface of the granular material are removed, the granular material is harmless and can be reused. Conceivable. However, there is a method of separating incinerated ash in which the granular materials are in a state of aggregate without destruction of the individual granular materials, or from a granular material of 2 mm or less having relatively strong adhesion of dioxins. A method of releasing dioxins has not been proposed to the knowledge of the inventors. Furthermore, since incinerated ash has a soft structure, it is not only difficult to remove dioxins adhering to the incinerated ash with a general crusher, but also, for example, when the incinerated ash is pulverized using a ball mill or the like, Is also finely divided, and the granular material to which dioxins are adhered cannot be separated, which makes it difficult to reduce the volume. On the other hand, in the contaminated soil, although there are few portions where the granular materials are in the aggregated state, the contaminants such as heavy metals and oily substances attached to the granular materials have extremely small particle diameters. In the same manner as described above, it is difficult for a general crusher to separate the contaminants, and the granular material of the contaminated soil is also finely divided, making it difficult to separate the contaminants.

Japanese Patent Application Laid-Open No. 8-164363 discloses a crushing method that removes sharp corners of stones and the like in a dredged soil without crushing the dredged soil including gravel and clay, and crushes a lump of earth or sand. Machine is disclosed. FIG. 7 (a),
(B) is a figure which shows the structure of this crusher 10, (a) is a side view, (b) is AA sectional drawing of (a).
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. A rotor 7 having a plurality of inner blades 7W protruding from the rotary drum 6 and eccentrically mounted inside the rotary drum 6.
The ring gear 6a provided on the outer periphery of the rotating drum 6 is rotated by the motor 8 and the rotating shaft 7a attached to the rotor 7 is rotated in the opposite directions by the driving mechanism 7b. The above-mentioned materials are subjected to compression and shear stress to crush the above-mentioned materials, or the crushed materials are polished by mutual friction between the crushed materials. The crushing process by the crusher 10 is performed in a dry or wet manner when grinding crushed stones, and when the sand is reduced into fine particles such as dredged soil including gravel and clay, the crushed water is added to the input material. While doing. The magnitude of the stress acting on the input material is adjusted mainly by the distance between the rotary drum 6 and the rotor 7 (the eccentricity of the rotor 7) and the respective rotational speeds of the rotary drum 6 and the rotor 7.

[0007]

However, in the above-mentioned crushing machine 10, although an example of crushing dredged soil including gravels and stones is disclosed, organic sources such as garbage and combustibles are burned. Agglomerated granules such as incineration ash,
There is no suggestion about a method of separating the above-mentioned granules without destroying them, or a method of separating heavy metals and dioxins adhering to the granules in the incineration ash to make the incineration ash harmless. Furthermore, in the crushing machine 10, when the treatment material is a contaminated soil to which a highly viscous contaminant such as carbon or an oily substance is adhered, or when heavy metals as the contaminant strongly adhere to individual granules, In such a case, it has been difficult to effectively remove contaminants attached to the particles.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems, and is intended to reduce the size of particulate matter to which contaminants such as contaminated soil and incinerated ash are attached and to efficiently separate the contaminants. It is an object of the present invention to provide an apparatus for treating a granular material to which a contaminant has adhered, which can remove the contaminant and reuse the harmless granular material from which the contaminant has been separated.

[0009]

According to a first aspect of the present invention, there is provided an apparatus for treating particulate matter to which contaminants have adhered, the method comprising adding water to the particulate matter to which contaminants have been introduced into a processing space while adding water thereto. By applying the force of compression and rubbing between the granules, the granules are separated into independent granules,
Fine-graining means for separating contaminants adhering to the surface of the granular material is provided in a plurality of stages, so that the granular material sequentially passes through each fine-graining means, From among the granular materials discharged from the means, a granular material having a size of a predetermined diameter or more between 5 mm and 10 mm and a separating means for separating a granular material having a size smaller than the granular material are provided. The smaller-sized granular material is fed into the subsequent-stage fine-granulating means. In addition, the compressive stress is applied to the granular material to which the contaminant adheres, which is performed by the above-described grain refining means,
In the following, a process of separating the granular material to which the aggregated contaminants having a large number of the granular materials adhered into the substantially independent granular material without destroying the granular material and refining the granular material is described below. Call. In addition, the stress applied to the granules is increased, and the force of rubbing between the granules is applied to cause mutual polishing by the friction between the granules, so that the contamination adhering to the surface of the granules is performed. The process of separating substances is described below.
This is called peptization.

According to a second aspect of the present invention, there is provided an apparatus for treating particulate matter to which contaminants are adhered, comprising: a fine particle containing contaminants such as heavy metals and dioxins from the smaller ones; Classifying means is provided for classifying harmless fine particles having a size larger than the fine particles.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a block diagram illustrating a configuration of a processing apparatus for a granular material to which a contaminant adheres according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes a primary granulating machine 11 which is first granulating means for adding water to a granular material to which a contaminant as a processing material is attached and coarsely crushing the granular material. Secondary granulation as second granulation means for adding water to the granules crushed by the primary granulator 11 and crushing and pulverizing the granules. A receiving hopper for charging granules to which contaminants are attached, and 14 a large-sized granule from among the granules discharged from the outlet 11a of the primary granulator 11. Classification nets of about 30 mm for capturing solids such as metals and contaminants.
5mm
Separation means for sending the following granules to the secondary granulator 12;
Reference numeral 16 denotes a classification means for classifying various-sized granules from the slurry-like granules sent out from the secondary granulation machine 12, which is provided with a classification means such as a liquid cyclone or a thickener tank. . Reference numeral 17 denotes a water supply unit for supplying treated water to the grain refiner 1 and the classifying unit 16, and reference numeral 18 denotes a sewage treatment unit for purifying treated water discharged from the classifying unit 16.

FIG. 2 is a view showing an example of the structure of the fine-graining apparatus 1. The granulator 12 and the granulator 12 are incorporated in one shell 2, and are operated by a common power unit 3. The conditions of pulverization and deflocculation in the primary granulator 11 and the secondary granulator 12 are as follows. The conditions are set so that each granular material is separated without breaking, and heavy metals or dioxins adhering to the granular material in the granular material are separated from the granular material. 4 is a processing material input port for inputting contaminated soil or incinerated ash, which is a processing material,
Reference numeral 5 denotes a processing material discharge port for discharging the processing material which has been sequentially pulverized and deflocculated in the respective processing gaps of the primary granulator 11 and the secondary granulator 12. It should be noted that the outlets to the separating means 15 and the inlets from the separating means 15 provided in the granulating apparatus 1 are omitted. As shown in FIG. 3 (a), the primary fine-granulating machine 11 that performs a coarse crushing process on the granular material to which the contaminant adheres reduces the amount of eccentricity of the rotor 7 so that the rotary drum 6 and the rotor 7 with relatively wide spacing D ₁ of the a rotation speed and low speed. Further, a secondary fine-granulating machine 1 for performing a process mainly based on peptization of the granular material 1
In 2, as shown in FIG. 3 (b), as well as narrowing the distance D ₂ between the rotary drum 6 and the rotor 7 eccentricity greatly to the rotor 7, and the rotational speed at a high speed.

[0013] Primary grain refiner 11 or secondary grain refiner 12
In the inside, as shown in FIG. 4, the granular material S attached to the gap between the rotating drum 6 and the rotor 7, which is the processing gap, to which the contaminant adheres is scraped upward by the outer blades 6 </ b> W of the rotating drum 6. At the same time, since the granular material S is pulled down by the inner blades 7W of the rotor 7, a compressive stress and a shear stress act on the granular material S, and the granular material S is pulverized and peptized. That is, as shown in FIG. 5 (a), the granular materials p or the granular materials adhered to the aggregated contaminants are adhered to each other at the adhered surface r. However, compressive stress and shear stress act on the large-sized granular material p, and the aggregated granular materials are separated from the fixing surface r to be finely divided into almost independent fine granular materials p. Fig. 5
As shown in (b), a force in the rubbing direction acts on the granular materials, and contaminants q such as heavy metals and dioxins attached to the surface of each granular material due to friction between the granular materials p.
Is separated from the granular material p (peptization).
The contaminant q is attached not only to the surface of the aggregated granular material, but also to the fixing surface r, which is the surface of each granular material p (see FIG. 5A). Therefore, at the time of crushing, the contaminant q attached to the surface of the aggregated granular material q
May be peeled off, but most are separated from the surface of the granular material p during the peptization. Some large-sized granular materials are crushed and refined. At this time, the treated water from the water supply unit 17 is supplied to the primary granulator 11 and the secondary granulator 12 through a water supply port (not shown). Since the granular material to which the contaminant is attached and which is attached to the granulation device 1 is crushed and deflocculated in a state in which the treated water is added, heavy metals and dioxins among the separated contaminants are used. Is dissolved in the above treated water or floats as fine particles.

Next, a method of treating particulate matter to which contaminants adhere by the above-described processing apparatus will be described, taking as an example a case where the processing material is incinerated ash. First, receiving hopper 1
The incinerated ash introduced into 3 is introduced into the primary granulator 11 from the treatment material inlet 4 of the granulating apparatus 1. In the primary granulating machine 11, coarse incineration is performed on the incinerated ash mixed with the treated water, and fine particles such as dioxin that are weakly adhered to the surface of the incinerated ash are separated and floated in the treated water. Or
While dissolving the easily dissolvable heavy metals in the above treated water, the incinerated ash, to which the particulate matter is fixed, is separated without breaking the particulate matter, and the incinerated ash is downstream of the primary granulator 11. And sent to the separating means 15. At this time, since the stress applied to the incinerated ash is set sufficiently lower than that of the crusher 10 described above, the particulate matter such as earth and sand and pottery pieces mixed in the incinerated ash is discharged without being crushed.

The dioxins adhering to the incinerated ash are:
Generally, it is said that the particles having a size of 5 mm or more in the incineration ash are harmless because they are attached to the particles having a size of 2 mm or less in the incineration ash. Therefore, as the separation means 15, a device for separating granular materials having a size of 5 mm or more in the incinerated ash, for example, a screening vibrating screen of about 5 mm, is used to screen 5 mm or more granular materials from the incinerated ash. The separated and sieved incineration ash of 5 mm or less is sent to the secondary granulator 12. On the other hand, 5mm-30
The granular material of about mm is carried out from the separating means 15 and reused or discarded.

The incinerated ash that has passed through the separation means 15 is approximately 5
mm or less, so that the secondary refiner 12
In this case, the interval between the rotating drum 6 and the rotor 7 is narrow and the rotation speed is high, so that the incineration ash can be separated into finer granules, and a part of the large-sized granules can be finely granulated, and the ash-resistant ash is strong. The incinerated ash is moved to the downstream side while the attached heavy metals and dioxin fine particles are separated by friction between the particles. The incinerated ash pulverized and pulverized by the secondary granulator 12 is sent out from the treated material discharge port 5 to the classification means 16 and classified into various-sized granules. The heavy metals and dioxins released from the granular material are sent to the classification means 16 together with the treated water for treatment, or sent to the sewage treatment unit 18 via the classification means 16 for treatment.

The classification means 16 classifies various sizes of granules such as sand, fine sand and fine granules which are components of ash from mud-like incinerated ash containing granules of 5 mm or less. The fine particles having a size 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 process such as melting and solidification. On the other hand, the treated water containing the eluted heavy metals is subjected to chemical treatment or the like in the sewage treatment section 18 to treat and purify the heavy metals, and then reused as circulating water. In addition, mud containing particulate matter of about 20 μm or more is reused because heavy metals and dioxins are removed and made harmless.

The method of treating the contaminated soil is the same as that of the above incinerated ash. However, since it is considered that the soil particles are less likely to be agglomerated, the primary finer 11 and the secondary finer 12
In both cases, 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 pulverization.

Embodiment 2 FIG. 6 is a diagram showing a processing flow of the continuous incineration ash processing system according to the second embodiment of the present invention. In the second embodiment, the above-described first embodiment is used.
The incineration ash supplied is continuously treated by using the same granulation apparatus 1 as described above, and the incineration ash is finely divided, the harmful substances in the incineration ash are efficiently removed, and the discharged harmless granules are discharged. It is designed to reuse the body. First, the incinerated ash supplied to the receiving hopper 13 is transported by a belt conveyor, and is supplied to the primary granulating machine 11. In the primary granulator 11, treated water from a secondary treatment 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 coarsely crushed, and the incinerated ash is reduced in size. While separating dioxins and heavy metals that are weakly adhering to the surface of the incinerated ash while floating or dissolving them in the treated water, the incinerated ash is moved to the downstream side, It is discharged from the discharge port 11a of the granulator 11. In the primary grain refiner 11, the distance between the rotary drum 6 and the rotor 7 is wide,
Since the rotation speed is low, solids such as large metals and contaminants are discharged without being crushed. This large solid is
It is captured and removed by a classification net 14 of about 30 mm provided at the outlet 11a, and is carried out by a belt conveyor. On the other hand, the incinerated ash which has become a granular material of about 30 mm or less is sieved by the primary screening vibrating screen 20 of about 5 mm to 10 mm (for example, 10 mm). The sieved incineration ash of 10 mm or less is removed by a magnetic metal remover 21 after removing metal pieces in the incineration ash.
It is sent to the secondary granulator 12. On the other hand, 10mm-30m
Granules of about m are carried out by a belt conveyor and reused or discarded. The primary screening vibrating screen 20
Is supplied from the water supply unit 17, and the water that has passed through the primary sorting vibrating screen 20 is sent to a first feed sump 23 described later. The primary sorting vibrating screen 20 is a unit corresponding to the separating unit 15 of the first embodiment.

The incinerated ash that has passed through the primary sorting vibrating screen 20 is in the form of granular material having a size of approximately 10 mm or less.
In the secondary grain refiner 12, the treated water from the water supply unit 17 is added to the incineration ash, the interval between the rotary drum 6 and the rotor 7 is reduced, and the rotation speed is increased. Are subjected to mutual polishing by friction between the granular materials, and the incinerated ash is moved to the downstream side while separating heavy metals and dioxins strongly attached to the incinerated ash.
The liquid is sent to the secondary sorting vibrating screen 22 from the second discharge port 12a. The secondary sorting vibrating screen 22 is for surely sieving a granular material having a size of 5 mm or less from the incinerated ash. The mud-like incineration ash containing the granular material of the above is temporarily stored in the first feed sump 23,
The particles are classified into various sizes by the classification means 16. Also, 5 mm to 30 m sieved by the primary sorting vibrating screen 20 and the secondary sorting vibrating screen 22.
Granules mainly composed of sand and small ceramic pieces of about m are carried out and reused or discarded.

Next, the classification process in the classification means 16 will be described in detail. The mud-like incinerated ash containing the granular material of 5 mm or less stored in the first feed sump 23 is sent to the first liquid cyclone 30 and classified. In the first hydrocyclone 30, particles having a size of about 100 μm or less are separated by being suspended in treated water. 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 particulate matter having a particle diameter exceeding 100 μm discharged from the bottom of the first hydrocyclone 30 is the first liquid cyclone 30.
After being sent to the spigot tank 31, the first dewatering vibrating screen 32 separates the granular material mainly composed of sand of about 100 μm or more, and sends it to the second feed sump 33. Similarly, the incinerated ash stored in the second feed sump 33 in the form of granules having a particle size of about 100 μm or less is subjected to a second liquid cyclone 34 and a second dehydration vibrating screen 36 to remove fine sand of 20 to 100 μm. Main granular material and 2
Classified into fine particles of 0 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 supplied to the second feed sump 3.
After being temporarily stored in the tank 3, it is sent to the thickener tank 40 via the trash disposal trommel 37. On the other hand, the first
Particle diameter discharged from the bottom of the hydrocyclone 30
After the slurry containing the particulate matter exceeding μm is sent to the second spigot tank 35, the particulate matter mainly composed of fine sand of about 20 μm or more is separated by the second dewatering vibration screen 36, and the thickener tank is separated. Sent to 40.

In the thickener tank 40, about 20 μm
The treated water containing fine particles of m or less and the mud-like incinerated ash are slowly rotated in a tank to perform solid-liquid separation for coagulating and sedimenting solids such as particulates. As described above, since the heavy metals separated from the incineration ash are dissolved or suspended in the supernatant liquid of the thickener tank 40, they are sent to the primary treatment water tank 50 of the sewage treatment section 18 for treatment. In the primary treatment water tank 50, the heavy metals are separated from the treatment liquid by adding a chelating agent or the like to form an insolubilizing salt of the heavy metals and insolubilize the heavy metals. On the other hand, the slurry-like incineration ash that has settled at the bottom of the thickener tank 40 is stored in the first slurry tank 41, and after removing fine particles such as dioxins in the centrifuge 42, the second slurry It is sent to the tank 43 and stored. The harmful sludge containing a large amount of fine particles such as dioxins separated by the centrifugal separator 42 is discarded by performing a process such as melting and solidification. On the other hand, slurry tank 4
Since the slurry stored in 3 is detoxified by removing heavy metals and dioxins, it is sent to the dehydrator 44, and the slurry is reused by producing a dehydrated cake by a filter press (not shown). be able to.

The water dehydrated by the dehydrator 44 is sent to a filtered water return tank 51 for temporary storage. After that, heavy metals are insolubilized in a primary treatment water tank 50 and then sent to a liquid filtration device 52. In the liquid filtration device 52, the treated water is filtered with an adsorbent such as activated carbon to remove heavy metals and dioxins to purify the treated water. The purified treated water is sent to a secondary treated water tank 53 that is a water supply unit. Further, the treated water sent from the thickener tank 40 to the primary treatment water tank 50 is also purified by the liquid filtration device 52, and then the secondary treatment water tank 53.
Sent to The treated water returned to the secondary treatment water tank 53 is mixed with fresh water for replenishment, and supplied again to the primary granulator 11, the secondary granulator 12, the primary sorting vibrating screen 20, and the like.

In the second embodiment, the incineration ash treatment system has been described. However, contaminated soil can be treated by the same treatment system as the above treatment system.
The contaminants attached to the soil particles can be efficiently removed, and stones, sand, fine particles and the like in the contaminated soil can be extracted and reused.

[0025]

As described above, according to the first aspect of the present invention, the granules to which the contaminants charged into the processing space are adhered are compressed and rubbed between the granules while adding water. By applying a force of matching, the granular material is separated into independent granular materials, and fine-graining means for separating contaminants adhering to the surface of the granular material is provided in a plurality of stages, and the granular material is provided. Are successively passed through each of the granulation means, and among the granules discharged from the preceding granulation means, granules having a size of a predetermined diameter or more between 5 mm and 10 mm in diameter, and Separation means for separating the smaller-sized granular material is provided, and the smaller-sized granular material is supplied to the subsequent-stage fine-graining means. Regulated granules can be processed. Therefore, the granular material to which the contaminant adheres can be efficiently crushed and peptized, and the classification of the granular material can be facilitated. Further, the separated granules having a diameter of 5 mm or more are harmless granules and can be reused.

According to the second aspect of the present invention, fine particles containing contaminants such as heavy metals and dioxins are selected from the smaller particles, and the fine particles are smaller than the fine particles. Classifying means for classifying large harmless fine particles is also provided so as to remove the harmful fine particles containing the contaminants, so that the larger harmless granular material can be recycled such as a dehydrated cake. It can be reused as a resource, and can have a remarkable effect on detoxification and volume reduction of the particulate matter to which contaminants adhere.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an apparatus for treating particulate matter to which contaminants adhere according to a first embodiment of the present invention.

FIG. 2 is a side view showing the grain refiner according to the first embodiment.

FIG. 3 is a diagram showing setting conditions of the grain refiner according to 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 a crushing / deflocculating action of the first embodiment.

FIG. 6 is a diagram showing a processing flow of a continuous incineration ash processing system according to Embodiment 2 of the present invention.

FIG. 7 is a view showing the structure of a conventional crusher.

[Explanation of symbols]

1 Atomizer, 2 shell, 3 motor, 4 processing material inlet, 5 processing material outlet, 6 rotating drum, 6W
Outer blade, 7 rotor, 7W inner blade, 11 primary granulator, 12 secondary granulator, 13 receiving hopper, 1
4 Net, 15 Separation means, 16 Classification means, 17 Water supply section, 18 Sewage treatment section, 20 Primary sorting vibrating screen, 21 Magnetic metal remover, 22 Secondary sorting vibrating screen, 23 First feed sump, 30 First Liquid cyclone, 31 first spigot tank, 32
1st dehydration vibrating screen, 33 2nd feed sump, 34 2nd hydrocyclone, 35 2nd spigot tank, 36 dehydration vibrating screen, 37 waste treatment trommel, 40 thickener tank, 41 first slurry tank, 42 Centrifugal separator, 43 second slurry tank, 44 dehydrator, 50 primary treatment water tank, 51
Filtration water return tank, 52 liquid filtration device, 53 secondary treatment water tank.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B09B 3/00 B09B 5/00 ZABN 5/00 ZAB (71) Applicant 390014568 Toshiba Plant Construction Co., Ltd. Ota, Tokyo 5-71, Kamata-ku, Ward (72) Inventor Takao Sango 2-3-13-1, Shinjuku, Shinjuku-ku, Tokyo Inside the molten resources company (72) Inventor Kenji Kawaguchi 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo No. Kumagaya Gumi Tokyo Head Office (72) Inventor Yutaka Shinta 265 Sakurazawa, Yorii-cho, Osato-gun, Saitama Prefecture Inside Shinrokuseiki Co., Ltd. (72) Inventor Pan Nakayama 3-7-1 Nishishinbashi, Minato-ku, Tokyo Toshiba Plant Construction Co., Ltd.

Claims (2)

[Claims] 1. A compressive force and a rubbing force between granular materials are applied to a granular material to which a contaminant charged in a processing space is attached, while adding water, to separate the granular material into independent granular materials. And a plurality of stages of fine-graining means for separating contaminants adhering to the surface of the granular material are provided so that the granular material sequentially passes through each fine-graining means, and Separating means for separating, from the granular material discharged from the fine-granulating means, a granular material having a predetermined diameter of 5 mm to 10 mm or more and a granular material having a size smaller than the above-mentioned granular material. Wherein the smaller granular material having the above-mentioned size is supplied to a subsequent-stage fine-granulating means. 2. Classifying fine particles containing contaminants such as heavy metals and dioxins, and harmless fine particles having a size larger than the fine particles from the smaller particles. The apparatus for treating particulate matter to which contaminants adhere according to claim 1, further comprising a classifying means for performing the classification.