KR20030065513A - Method and apparatus for treatment of decomposing atoms in incineration ash by diffusion to detoxify them - Google Patents

Abstract

A method and apparatus for detoxifying toxic substances such as dioxins and related compounds and heavy metals, which are included in incinerators formed during incineration in an incinerator, which cause cooking waste, general waste, etc., which are dehydrated, After drying and pulverizing, after the reduction step and stabilization step in a space of low oxygen concentration insulated from outside air, harmful substances are reduced and heavy metals are converted into stable compounds, respectively.

Description

Method and apparatus for treating of decomposing atoms in incineration ash by diffusion to detoxify them}

In the past, waste has been disposed of by landfilling or incineration, but it has become a social problem from the increase of waste caused by mass production and spread of mass consumption for the past ten years and the accompanying disposal problems. Therefore, in the disposal of garbage, incineration by municipalities dominates the mainstream, and now 70% of garbage is incinerated.

However, with the increase of waste incineration, there are many environmental pollution problems such as dioxin generation problems and heavy metals contained in waste incineration ashes.

Incinerator ash discharged from the furnace of a conventional incineration plant is generally disposed of landfill, but incineration ash contains a lot of unburned. This unburned powder contains a large number of precursors that can generate harmful substances such as unburned carbon powder and hydrocarbons. In addition, large amounts of organic chlorine compounds, heavy metals, and dioxins are contained in the ash collected by the dust collector of the incineration plant.

Precursors, organic chlorine compounds and dioxins of the harmful substances are said to be produced as a result of incomplete combustion of waste. Therefore, if the waste can be completely burned, no harmful substances are generated. However, the conventional incineration facilities do not have the capability of completely burning the waste, and the incineration ashes containing a large amount of toxic substances and dioxins are buried as they are.

In addition, due to the recent shortage of landfills, the number of municipalities dealing with and storing incineration ash near illegal dumping has increased, and the environmental pollution problem caused by garbage is becoming more serious.

For this reason, the Ministry of Health and Welfare encourages complete burning of waste and recycling of incineration residues by high temperature melting furnaces.

The primary purpose of introducing the high temperature melting furnace is to reduce and reduce waste. However, the above method is merely a method in which the atmosphere is regarded as a waste site.

Matter is in one of three states: solid, liquid, and gas. Therefore, if there is no solid present, it means that it turns into gas and is released into the atmosphere, and the reduction of garbage by hot melting is never a good treatment method for the environment.

In addition, since it is a huge fund even if we consider equipment cost and disposal cost, it is a waste of tax to perform such treatment with respect to the garbage which comes out every day.

By using a high melting method such as a high temperature melting method or a gasification melting method, the waste can be completely incinerated. However, even if the waste is burned under the best conditions, if a substance containing chlorine at the time of combustion, that is, a halogen source is present, the waste is chlorinated at the same time as oxidized and is contained in the incineration ash as a harmful chlorine compound. This chlorinated compound becomes a precursor to generate harmful substances such as dioxins.

In addition, even when using this high temperature melting method, about 20% of incineration ash and non- ash are generated after incineration. Here, the incineration ash has a composition close to the soil component, but contains six items such as lead, mercury, cadmium, hexavalent chromium, arsenic, and selenium, which are designated as hazardous substances.

Therefore, since landfilling of such incineration ashes causes soil pollution and groundwater pollution, it has been desired to develop a method of detoxifying or secondarily using incineration ash as resources before landfilling.

It is an object of the present invention to provide an incineration ash treatment method and apparatus thereof that do not pollute the environment with heavy metals or dioxins from urban waste, general incineration ash to the future while decomposing the generated exhaust gas. .

The present invention is a process for decomposing and harming an incineration ash for use effectively as a renewable resource in a safe and stable form, while harmlessly treating an incineration ash (non ash and a host material) and exhaust gas generated from the viewpoint of environmental pollution. Method, and apparatus thereof.

1 is a flowchart of a processing method for decomposing and detoxifying atoms of an incineration ash of the present invention by diffusion.

Best Mode for Carrying Out the Invention

Next, one embodiment of this invention is described using drawing. Incidentally, Fig. 1 is a flowchart of a processing method of decomposing and detoxifying atoms of an incineration ash of the present invention by diffusion.

In the method for treating incineration ash according to the present invention, all ashes after incineration (hereinafter referred to as raw materials), such as bottom ash (base ash), fly ash (fly ash, fly ash) or mixtures thereof (incineration residues), other industrial wastes, etc. ) Can be used as a raw material (raw material recovery). The raw material generally contains near 40% of moisture, and the drying process is performed at a temperature of 500-700 ° C., more preferably 600 ° C., using hot air to facilitate processing in a later step. (Dehydration drying process).

Since the said drying process is performed in presence of air, the unburned material contained in a raw material can be burned completely.

In addition, in order to prevent the harmful substances contained in the raw materials from vaporizing during hot air drying and being released into the atmosphere, the exhaust gas generated in the drying process is treated with a catalyst or the like to treat the harmful substances contained in the exhaust gas. Is released into the atmosphere via a (fuel treatment process).

Here, the flue gas treatment is also performed for flue gas generated from a reduction reaction treatment step or a stabilization treatment step described later.

Next, metals contained in the dried raw material are attached to a magnet or the like to be removed, and the glass and the coarse and large impurities are sorted out on a vibrating body or the like. In addition, the sorted glass is finely ground with a glass mill, and then mixed with the raw materials after passing through a sieve (crushing and sorting step).

In the above pulverization / selection process, raw materials from which metals and impurities have been removed are pulverized with a pulverizer and separated by using a cyclone or the like. In addition, more than the predetermined particle size among the raw materials after the separation is returned to the grinder to make the particle size of the raw material be equal to or less than the predetermined particle size (grinding treatment step).

The raw materials include various metals such as iron, lead, copper, cadmium, mercury, and the like, and these metals are used as catalysts in the following reduction step. In general, since a metal catalyst has a small surface area and a small capacity as a catalyst, it is necessary to crush the raw material to increase the surface activity as a fine powder to increase the catalytic activity. Therefore, the predetermined particle size here is preferably 50-200 mesh, more preferably 100-150 mesh from the difference in activity and the like in the subsequent reduction treatment step.

In addition, the present invention is carried out using a minimum of heat, impact force, and a catalyst in order to pulverize and finely atomize and deplete atoms from the crystals of the metal contained in the raw material. Therefore, it is preferable to perform the grinding | pulverization process in this grinding | pulverization process in the impact conditions which apply an inertial force of 3 G or more, preferably 5 G. Here, although the grinding | pulverization processing machine used for a grinding | pulverization processing process is not specifically limited, For example, a hammer mill is mentioned.

A catalyst or an additive (such as inorganic substance) such as Pt is added to the raw material which has been subjected to the pulverization treatment step, and charged into a reduction reactor, the raw material is heated to 600 ° C. and a reduction reaction is performed for 40 minutes (reduction reaction step).

This reduction reaction is controlled at low oxygen concentration by introducing an inert gas such as nitrogen gas. In addition, since raw materials contain oxides of metals or non-metallic elements, in some cases, there may be generation of toxic substances using these as catalysts. Therefore, the oxygen concentration in the furnace is preferably 6% or less in order to suppress the generation of harmful substances (for example, dioxins) in which oxygen is a catalyst among these toxic substances. More preferably, in order to more efficiently prevent the generation of harmful substances, the oxygen concentration is preferably 3% or less.

Here, the catalyst material is diverse in any kind of gas, liquid and solid.

In general, dioxins are not decomposed at firing temperatures of 950 ° C or lower. However, when using the method of the present invention, the raw material is activated at low temperature, 500-600 ° C., because the raw material is activated by the micronization in the pulverization process, the lack of metal atoms in the metal crystal lattice, and the diffusion of atoms. Disassembly at is possible.

In addition, when calcium oxide or the like is incorporated therein, decomposition of dioxins starts at a lower temperature to produce calcium chloride or the like.

Therefore, dioxins are dechlorinated / hydrogenated and decomposed by activation by a diffusion phenomenon, catalysts, and additives (inorganic substances) by maintaining a constant temperature and a predetermined time in a space of low oxygen concentration atmosphere insulated from outside air.

Next, the raw material after the reduction reaction step is subjected to heat treatment for 20-30 minutes by adjusting the temperature in the furnace to 300-600 ° C., more preferably 400-500 ° C. under the low oxygen concentration atmosphere (stabilization treatment step).

In this process, raw materials, which are mixtures of dissimilar metals, including heavy metals, are efficiently decomposed using atom diffusion, and stabilized by dissociating and crystallizing metal salts using heavy metal salts, metal oxides, and metals as catalysts.

Diffusion refers to the movement of atoms in a solid metal (crystal), that is, atoms moving freely in a crystal.

In the solid state, which is one of the forms of matter, most materials form crystals, in which many atoms are regularly arranged in three dimensions to form crystal lattice. In the present invention, the metal atom is deficient in the crystal lattice due to an impact of 5 G inertial force in the pulverization treatment step, and thus the metal is in an unstable state, resulting in an empty hole or distortion in the crystal lattice.

Therefore, by applying thermal energy to activate the thermal vibration of atoms and creating a state in which the atoms move freely in the crystal (diffusion state), new atoms are missing from the crystal lattice to solve the distortion of the crystal lattice (dehalogenation), Alternatively, atoms are easily contained in the vacant holes in the crystal to eliminate distortion of the crystal lattice and convert (stabilize) the metal to a stable compound.

In the stabilization process, the metal is stabilized as a compound, but may be in various forms such as oxides, hydroxides, sulfur oxides, sulfides, phosphates, and phosphides, depending on the type of metal. For example, many metals other than alkali metals and alkaline earth metals stabilize as hydroxides that are insoluble in water. In addition, Pb and the like are stabilized with [Pb (OH) ₂ ] as a hydroxide, but since the hydroxide shows water solubility under strong acidic conditions, it is stabilized as a sulfide. In addition, As and P react with CaO to stabilize.

The metal element has a high density and is mainly a metal belonging to a transition metal and its ions. Some elements of raw materials are relatively small in ordinary soil. However, these also include acting as trace elements indispensable for plant growth.

In addition, trace elements that are not included in hazardous metals, which are nonmetals, may be considered to be related to contamination.

When metal compounds are buried underground, microorganisms in the soil gradually mineralize most of the elements and reduce them to the atmosphere in the form of CO ₂ , H ₂ O, and N ₂ .

In addition, inorganic cations such as Ca ²⁺ , Mg ²⁺ and K ⁺ are adsorbed to corrosion or clay. In corrosion, the functional group as the organic acid, and in clay, the negative charge of the interlaminar position and lattice rupture of the clay mineral adsorb the cation.

Anions such as C 1 ^- and SO ₄ ^2- are also adsorbed by corrosion or partial positive charge of clay. Stabilized metal compounds are mostly present in the form of primary minerals, clay minerals and corrosion internal structures, and are adsorbed in solution in the form of ions or on ion exchange sites of clay or corrosion surfaces.

In addition, the raw material has a high basicity C ₈ O / SiO ₂ , and has a property of crystallizing by slow cooling, and when it is quenched, it becomes glassy. That is, as a substance hard to be dissolved in water, a stable and safe substance is produced.

In the stabilization step, an inorganic additive may be added to change the properties of the compound as an insoluble metal. For example, calcium-based and phosphorus-based additives are non-toxic and thus may be mentioned as main additives. In the case of using a calcium-based additive, chlorine in the raw material is fixed as calcium chloride. The calcium chloride is a pollution-free material, there is no fear of pollution.

Next, the product (henceforth a raw material after a process) obtained from the raw material is demonstrated using the method which concerns on this invention. In general, since the raw material has a high water content and is a mixture of organic components and heavy metals, solidification is most difficult when used for hydraulic cements.

In order to promote the detoxification of the metal having the above-mentioned solidification inhibitor and the hardening of the organic compound, the raw material after the treatment of the present invention removes the inhibitory factors by the diffusion decomposition of atoms by the atomization and the synergistic effect of the catalytic reaction and the reduction reaction. Doing.

In general, cement reacts with water to precipitate hydrate crystals, which solidify and solidify, and the hydrate crystals are stable at room temperature. The elements constituting the cement are the most calcium in composition, followed by oxygen, silicon, aluminum, iron, sulfuric acid, magnesium, sodium, etc., but the chemical composition of CaO, SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , It exists as an oxide of SO ₃ and MgO and occupies 92% of the total.

On the other hand, raw materials after treatment are not consistent in quality, but 25-27% of calcium CaO is the highest, followed by 22-24% of alumina Al ₂ O ₃ , 15-17% of silica SiO ₂ , and iron Fe ₂ O ₃ . 9-11%, sulfuric acid group SO ₃ is 2%, magnesium MgO is 2%, and the like, which includes cement, stone, silica, and alumina, which do not have the strength as a hydraulic cement.

However, it is potentially hydraulic, and the hydraulic property is gradually exerted over time by stimulating action other than neutral such as alkali or sulfate.

In addition, the basicity value (CaO + Al ₂ O ₃ + MgO) / SiO ₂ represented by the chemical composition is about 1.35 to 1.45 in the raw material after the treatment, and the basicity is about 1.00% lower than that of cement.

Compared to cement, the advantage of the raw materials after treatment is that they are not weathered and innocent because there is no reaction by water vapor or carbon dioxide.

In addition, the raw material after the treatment contains a large amount of acutely reacted alumina, magnesium and calcium, and the content thereof is much higher than that in the cement component, so that the reaction rate is high and the coefficient of expansion is high.

Also, in general, cement becomes concrete and the structure is easily destroyed because sulfate is combined with Ca (OH) ₂ in concrete to form calcium sulfate CaSO ₄ , and further, trialuminum trihydrate hydrate 3 CaO · Al _2. This is because it combines with O ₃ ㆍ nH ₂ O to form cement falks.

Since the incineration ash after the treatment of the present invention has a fast reaction rate and a high coefficient of expansion, the reaction starts early and Ca (OH) ₂ is rapidly formed, and Ca (OH) ₂ is less and C ₃ A is less in the cured product. Therefore, the resistance of the structure is large.

By using together with cement from the above properties, the soil having excellent foaming capacity and dispersing capacity for solidification, fluidity and strong viscosity can be chemically changed to sand.

Moreover, there is a characteristic that the water permeability such as ground improvement is excellent and the strength can be maintained.

Next, the apparatus used for implementing the method of this invention is demonstrated.

Apparatus according to the present invention is a dehydration drying treatment apparatus for completely burning the unburned powder contained in the raw material at a high temperature at the same time to perform the dehydration drying treatment with hot air to moisture contained in the raw materials such as incineration ash, dehydrated dried incineration ash The irons mixed in the raw materials such as these are self-fixed by magnets and sorted from the raw materials, and then, on a new vibrating body, the glass and the rough and large impurities contained in the raw materials are sorted and the selected glass is mixed into the raw materials after drying. Crushing and screening apparatus for crushing and screening

A shredding treatment apparatus which applies a force of inertial force of 5 G to the raw materials such as incineration ash after crushing and screening to make the particle size of the raw material less than the predetermined particle size and promotes the release of chlorine or other impurity atoms in the following reduction treatment step; ,

Pt is added to raw materials such as incineration ash after crushing treatment, and metals contained in the raw materials or Pt are used as catalysts to reduce the harmful substances contained in the raw materials by treating them for a predetermined temperature and predetermined time in an inert gas atmosphere such as nitrogen gas. A reduction reaction treatment apparatus for

Stabilization apparatus for converting metals contained in raw materials such as incineration ash after reduction reaction treatment into harmless compounds,

A flue gas treatment system is provided for detoxifying harmful substances contained in flue gas generated during dehydration drying, reduction reaction treatment, and stabilization treatment using a catalyst or the like.

By using the apparatus, harmful substances such as dioxins contained in raw materials such as incineration ash are harmless by reduction treatment, metals are harmless by stabilization treatment, and harmful substances contained in exhaust gas are sent to the flue gas treatment apparatus. Harmless by

Therefore, even if the incineration ash treated using the apparatus according to the present invention is embedded and treated like a conventional incineration ash, it does not contaminate the soil at all.

Moreover, the incineration ash processed using the apparatus which concerns on this invention can be used again as a resource as aggregate, such as concrete.

In addition, each said apparatus is not limited to the structure provided independently, In order to increase the throughput of an incineration ash, you may be comprised with the same apparatus in multiple numbers in parallel.

Example 1

Next, the result of having processed the incineration ash using the method which concerns on this invention actually is described below.

Incinerator ash was collected from stocker type incinerators and fluidized bed furnace incinerators for three years at a daily tonnage of 30 t.

In addition, the specifications and setting conditions of each of the crushing, grinding reactions, reduction reactions, stabilization reactions and flue gas reactions of the incineration ash recycling plant system are as follows.

(1) Raw material import feet: 50 m ³

Feedstock Clay 13 t / h

Import Hopper 10 m³

Feeder 15 t / h

(2) Sorting and shredding device

Oscillation (50 mm screen)

Sorting machine (except iron charity)

(3) drying equipment 3 t / h x 2

Drying temperature 500 ℃

Processing time 30 minutes

Additive (calcium 3%)

Oxygen concentration less than about 6%

(4) crusher

It gives a shock of 5G as fine powder (fine particles).

Sulfide is made by adding 0.03% of phosphite or 0.03% of phosphide or iron sulfide.

(5) Reduction reaction treatment device

Throughput: 3t / h x 2

Reaction temperature: 500-400 ℃

Reaction time: 20-30 minutes

Acid concentration: 30% or less

(6) Stabilization reaction treatment device

Throughput: 3t / h x 2

Reaction temperature: 200-300 ℃

Response time: 10 minutes

(7) Hopper, stirrer: 30 m ³

(8) flue gas treatment system

Filter dust collector (bag filter) is used for comprehensive exhaust gas treatment. The filtration layer detects the pressure loss of the follicles and controls it to a constant pressure (60-150 mmAg).

<Quantity of toxic substance in raw materials after processing>

As a result of dissolving incineration residue, which is a mixture of incineration ash and ash, with 20% cement of the product (New Hard), which was detoxified by this equipment, the dissolution test of hazardous designated metals as solids was carried out and exceeded the standard value as shown in Table 1.

Object of measurement The result of weighing pH = 7 pH = 4 cadmium Less than 0.01 (mg / l) Less than 0.01 (mg / l) lead Less than 0.01 (mg / l) Less than 0.01 (mg / l) Hexavalent chromium Less than 0.05 (mg / l) Less than 0.05 (mg / l) arsenic Less than 0.01 (mg / l) Less than 0.01 (mg / l) Mercury Less than 0.00005 (mg / l) Less than 0.00005 (mg / l) selenium Less than 0.01 (mg / l) Less than 0.01 (mg / l)

In addition, the dissolution test was performed at two levels of pH = 4 and pH = 7. In addition, the measurement of each weighing object is according to JIS K 0102 55.1 for cadmium, JIS K 0102 51.4 for lead, JIS K 0102 65.2.1 for hexavalent chromium, and JIS K 0102 61.2 for arsenic. Regarding the total mercury, Small 46 Announcement No. 59, Table 1, and selenium, respectively, were carried out in accordance with JIS K 0102 67.2.

Table 2 shows the results of measuring the concentration of dioxins in the incinerator exhaust gas. As a result, as shown in Table 2, it was found that each gas concentration in the exhaust gas was below the reference value, and further, the concentration of dioxins also showed a value less than the ND value (lower limit value). Therefore, the harmful substance contained in the exhaust gas discharged from the apparatus concerning this invention is below a reference value.

Object of measurement The result of weighing Measure 02 12% conversion Dioxin concentration (ng-TEQ / m3N) - <0.016 Dust concentration (g / m3N) 0.05 0.06 NOx concentration (v / v ppm) 46 56 Sulfur oxide concentration (v / v ppm) <5 - Sulfur Oxide (m3N / h) <0.008 - Hydrogen chloride concentration (v / v ppm) 0.7 0.9 Carbon Monoxide Concentration (v / v ppm) 8 10

In addition, the concentration measurement method of each measurement target is the Ministry of Health, Labor and Welfare Publication No. 234 (1997) "Calculation method of dioxin concentration" regarding dioxin concentration, and JIS Z 8808 (1995) "Dust concentration in exhaust gas" regarding dust concentration. The method for measuring nitrogen oxides is described in JIS K 0104 (1984) "Method for Determining Nitrogen Oxide in Exhaust Gas", and for the concentration of sulfur oxides in JIS K 0103 (1995) "Method for Analyzing Sulfur Oxide in Exhaust Gas". The concentration of hydrogen chloride was conducted in accordance with JIS K 0107 (1995) "Method for analyzing hydrogen chloride in exhaust gas" and JIS K 0098 (1988) "Method for analyzing carbon monoxide in exhaust gas" for carbon monoxide concentration.

MEANS TO SOLVE THE PROBLEM As a result of vigorous examination, the present inventors came to solve the said subject with the following structures. That is, a dehydration drying step of reducing the moisture content of the incineration ash, a flue gas treatment step of heating the exhaust gas generated from the dehydration step in the presence of a transition metal catalyst, and a pulverization treatment of the incineration ash dried by the dehydration drying step. In the treatment method for the detoxification and recycling of incineration ash comprising a treatment step and the step of maintaining the incineration ash pulverized in the crushing treatment step in a low-oxygen space insulated from the outside air to maintain a constant temperature and a certain time In this case, the process of maintaining and maintaining a constant temperature and a predetermined time in a space of low oxygen insulated from outside air makes it possible to detoxify and stabilize the harmful substances in the incineration ash by using the diffusion of atoms (claim 1).

According to the above constitution, by using the diffusion phenomenon of atoms contained in the ground incineration ash, harmful substances such as dioxins contained in the ash are dehalogenated and decomposed and decomposed. Heavy metals contained in the incineration ash can be recombined into stable and harmless compounds.

The dehydration drying step was performed by heating the temperature in the furnace to 500 to 700 ° C. (claim 2). According to the said structure, the grinding | pulverization process is easy in the next grinding | pulverization process by removing the water contained in an incineration ash.

Moreover, the structure which provided the grinding | pulverization and selection process before the said grinding | pulverization process process was made (claim 3). According to the said structure, since impurities, such as iron mixed in an incineration ash, are removed, and glass is micronized, it becomes a pretreatment of a grinding | pulverization process process.

Moreover, in the said grinding | pulverization process process, the structure which gives the impact which takes 5 G of inertia forces was comprised (claim 4). According to the above structure, the incineration material is efficiently adjusted to a particle size suitable for the following reduction reaction process by giving an impact of 5 G of inertial force, and at the same time, atoms are removed from the metal crystal lattice of the metal included in the incineration material, and the subsequent reduction treatment is performed. Produces a state that promotes the release of chlorine and other impurity atoms in the process.

In addition, the process of maintaining and maintaining a constant temperature and a predetermined time in a space of low oxygen insulated from the outside air includes a reduction reaction process and a stabilization process, wherein the reduction reaction process is a reduction reaction at an oxygen concentration of 3% or less. The configuration was characterized by performing (claim 5). According to the said structure, in the said grinding | pulverization process process, generation | occurrence | production of the harmful substance by the oxidation reaction in a furnace is suppressed.

In addition, the dehydration drying treatment apparatus for performing a dehydration drying treatment of water contained in the incineration ash,

A shredding / screening device for sorting the glass contained in the dehydrated incineration ash and crushing the sorted glass;

A pulverizing treatment apparatus for crushing the finely divided incineration ashes after crushing selection and depleting atoms from within the crystal lattice of atoms contained in the incineration ash;

A reduction reaction treatment device which makes harmless substances harmless by using the diffusion reaction of atoms contained in the incineration ash after grinding treatment,

A stabilization treatment apparatus for converting metals contained in the incineration ash into a stable compound using a diffusion reaction of atoms contained in the incineration ash after the reduction reaction;

It was set as the processing apparatus provided with the dehydration drying apparatus, the reduction reaction processing apparatus, and the flue gas treatment apparatus which performs the detoxification process of the flue gas which generate | occur | produces from a stabilization treatment apparatus (claim 6). According to the said structure, while the detoxification process of the dioxins contained in an incineration ash is carried out, the heavy metals contained in an incineration ash are converted into a stable compound.

According to the invention as recited in claim 1, a state in which atoms move freely in a crystal by applying thermal energy to an incineration material including a metal atom in which the atoms are missing and activated from the crystal lattice to activate thermal vibration of the atoms Since it is possible to produce (diffusion state), in order to eliminate distortion of the crystal lattice, harmful substances such as dioxins contained in the incineration ash can be harmless by missing new atoms (such as halogen atoms) from the crystal lattice.

In addition, in order to solve the distortion of the crystal lattice, when atoms enter easily into the vacant holes in the crystal, recombination of atoms occurs to convert heavy metals and the like contained in the incineration ash into stable and harmless compounds.

According to the invention described in claim 2, since the water contained in the incineration ash can be removed, the fluidity of the incineration ash which is wet and poor in fluidity is good. Therefore, the sorting and pulverization can be easily performed in the pulverization / selection step following the dehydration drying step. In addition, the unburned powder contained in the incineration ash can be completely burned by high temperature in the presence of oxygen. Therefore, generation | occurrence | production of dioxins from unburned powder can be prevented.

In addition, according to the invention described in claim 3, irons such as nails mixed in raw materials such as dehydrated and incinerated ash can be self-fixed by a magnet and selected from the raw materials. In addition, the glass and the coarse and large impurities contained in the raw material can be picked up on the vibrating body, and the selected glass can be pulverized to be mixed into the raw material after drying on the sieve. As a result, impurities which are difficult to be processed such as nails can be removed, and the incineration ash can be easily crushed in a crushing step which is a later step.

Further, according to the invention described in claim 4, a force of inertia force of 5 G is applied to raw materials such as incineration ash after crushing and screening so as to be smaller than a predetermined particle size. The raw materials include metals that can be used as catalysts in the post-reduction treatment process. As a result of the crushing treatment by applying an inertia force, it becomes fine and is activated as a catalyst, so that the reaction in the reduction treatment process can be promoted.

According to the invention described in claim 5, the reduction reaction can be carried out under low oxygen conditions by introducing an inert gas. As a result, generation of harmful substances mediated by oxygen can be suppressed.

In addition, by using the apparatus of the invention as claimed in claim 6, the designated hazardous substances contained in the incineration ash are harmless by the reduction reaction treatment apparatus. Furthermore, since the water-soluble substances contained in the raw materials are stabilized by using both chemical and physical treatments, and are insoluble substances (naturally stored mineral resources), raw materials after the treatment are used to pollute the environment with heavy metals and dioxins until the future. It is safe without work.

Furthermore, the raw material after the treatment becomes a soil component and can be used also as a hydrated solidifying material by use in combination with a fault trend cement or the like.

Therefore, it becomes a structure of a circulating society that can be recycled as a new material without having to be embedded in the final disposal site.

In addition, the use of the treatment apparatus of the present invention for the treatment of waste discharged daily results in a third of the cost as compared with the case of using the high temperature melting method.

Claims (6)

Dehydration drying process to reduce the moisture content of the incineration ash, A flue gas treatment step of heating the exhaust gas generated from the dehydration drying step in the presence of a transition metal catalyst; A pulverization treatment step of pulverizing the incineration material dried in the dehydration drying process; In the processing method for the detoxification, recycling of incineration ash comprising a process of maintaining the incineration ash pulverized in the pulverization treatment step, in a space of low oxygen insulated from outside air, maintaining a constant temperature and a predetermined time, In a low-oxygen space insulated from the outside air, the process of maintaining and maintaining a constant temperature and a predetermined time is performed by diffusing atoms of an incineration ash, wherein the harmful substances in the incineration ash are stabilized by diffusion of atoms. Decomposition and harmless treatment method. The treatment method according to claim 1, wherein the dehydration and drying step is performed by heating the furnace temperature to 500 to 700 ° C. The treatment method according to claim 1, wherein before the pulverization treatment step, a pulverization / selection step is provided to decompose and atomize the atoms of the incineration ash by diffusion. The treatment method according to claim 1, wherein in the pulverizing treatment step, an impact in which an inertial force of 5 G is applied is decomposed by diffusion to detoxify the atom. The process of claim 1, wherein the process of maintaining and maintaining a constant temperature and a predetermined time in a space of a low oxygen state insulated from outside air includes a reduction reaction process and a stabilization process, and the reduction reaction process has an oxygen concentration of 3% or less. A treatment method for decomposing and detoxifying atoms of an incineration ash by diffusion, characterized in that the reduction reaction is carried out. An apparatus for carrying out the method of claim 1, comprising: a dehydration drying treatment apparatus for performing a dehydration drying treatment of water contained in an incineration ash; A crushing sorting device for sorting the glass contained in the dehydrated incineration ash and crushing the sorted glass; A pulverization treatment apparatus for pulverizing the atomization of the incineration ash after crushing selection, and depleting atoms from the crystal lattice of atoms contained in the incineration ash; A reduction reaction treatment apparatus which makes harmless substances harmless by using the diffusion reaction of atoms contained in the incineration ash after the grinding treatment, A stabilization treatment apparatus for converting metals contained in the incineration ash into a stable compound using a diffusion reaction of atoms contained in the incineration ash after the reduction reaction treatment; A dehydration drying apparatus, a reduction reaction treatment apparatus, and a flue gas treatment apparatus which performs detoxification treatment of flue gas generated from a stabilization treatment apparatus.