JP2005270874A - Treatment method of polluted soil and apparatus thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment method of soil polluted with organic substances capable of suppressing the deterioration of burning efficiency of cement clinker and the effect on cement quality, safely treating the soil polluted with organic substances and recycling the soil as cement clinker raw material when the polluted soil is treated in cement burning equipment, and to provide a treatment method of polluted soil and an apparatus thereof capable of increasing the utilization and treatment of combustible waste in a cement burning furnace. <P>SOLUTION: In the treatment method of polluted soil for heating the polluted soil and using the same as cement raw material, organic waste containing combustible substances and the polluted soil are supplied into a waste heating and burning apparatus simultaneously and are mixedly heated and burned. Preferably, high temperature air discharged from a clinker cooler of the cement burning equipment is introduced to the waste heating and burning apparatus and waste gas discharged from the waste heating and burning apparatus is introduced to the cement burning equipment, particularly a calcining furnace or a suspension preheater. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for treating contaminated soil with a cement firing facility, and in particular, effectively uses the cement firing facility to treat combustible waste and the contaminated soil at the same time, and treats the treated soil as a cement raw material. The present invention relates to a method and apparatus for treating contaminated soil that is effectively used as a device.

In recent years, contaminated soil containing oil and toxic substances has been discovered along with the suspension of factory operations and use modification of former sites, which has become a social problem.
As treatment of such contaminated soil, solidification / landfill disposal, removal / incineration by heating, and chemical / biological decomposition treatment are performed.
The contaminated soil means soil contaminated with heavy oil, light oil, lubricating oil, etc., mineral oil, vegetable oil, etc., solvent, dioxin and the like. These soils include those that are complex contaminated with heavy metals and the like.

These contaminated soils need to be detoxified, and various detoxification methods have been developed accordingly. One method is to remove contaminated soil from contaminated land and use it as a cement raw material in cement burning equipment.
As a first method for treating contaminated soil in a cement firing facility, there is a method in which contaminated soil is heated in advance and detoxified soil is used as a cement raw material.
As a second method, wet pulverization is performed on the contaminated soil in a high water content state, and the pulverized slurry in the contaminated soil is directly put into the high temperature position of the cement firing facility to incinerate the contained oil and harmful substances. There is a way to do it.

FIG. 3 is a schematic diagram showing a conventional cement production facility, and further clearly shows the contaminated soil treatment position in the cement firing facility in the first and second treatment methods.
In FIG. 3, reference numeral 1 is a raw material mill (cement raw material drying and grinding machine), 2 is a cyclone (cement raw material powder separator), 3 is a cement raw material storage, 4 is a waste storage facility (in the first processing method described above). (Used) 5 is a contaminated soil storage facility pulverized by a wet mill (used in the second processing method), 6 is a slurry-like contaminated soil transport pump, 7 is a kiln bottom, 8 is a rotary kiln (cement firing facility) ), 9 is a calcining furnace secondary duct, 10 is a calcining furnace, 11 is a suspension preheater, 12 is a clinker cooler, 13 and 16 are electrostatic precipitators, 14 is an exhaust chimney, and 15 is a cooler exhaust line.
Further, 21 is a cement raw material supply line, 22 is a raw material supply line containing waste, 23 is a cement raw material powder supply line, 24 is a cement clinker conveying line, and 25 is a slurry-like contaminated soil supply line.

Here, without any pretreatment of the contaminated soil, powder is directly used as a cement raw material from the waste storage facility 4 in the raw material mill (cement raw material drying and grinding machine) 1 in the same manner as other cement raw materials. When used as a raw material, a part of the pollutant is volatilized in the gas in the raw material mill, destabilizes the electrical resistance value of the dust in the exhaust gas, and the dust collection efficiency of the 13 electric dust collectors decreases. Some dust may be discharged to the outside.
Moreover, the volatilized volatile organic compound that is a pollutant is not always easy to collect with an electrostatic precipitator and may be discharged to the outside.

Therefore, the above two treatment methods have been developed as treatment methods that do not release pollutants in the contaminated soil to the outside.
After the contaminated soil is preheated to remove the pollutants, the contaminated soil after the heat treatment is used as a part of the cement raw material from the waste storage facility 4 in the same manner as other cement raw materials. This first method is disclosed in the following document.
JP 2003-103243 A

  For example, in Patent Document 1, after the volatile organic compound in the contaminated soil is thermally desorbed with a heat treatment device in the contaminated soil containing the volatile organic compound (VOC), the separated volatile organic compound is burned in the cement firing kiln. A rotary kiln or a rotary dryer is used as a heat treatment apparatus (not shown). Moreover, the heat source to the heat treatment apparatus is usually performed by introducing exhaust gas discharged from a cement firing facility.

In addition, the second method in which the contaminated soil is wet pulverized in a high water content state and incinerated with a cement rotary kiln as the high water content slurry contaminated soil is pulverized in a wet mill (not shown), and then in a slurry state. The contaminated soil storage facility 5 is supplied to a high temperature part such as the rotary kiln bottom 7 and processed, and the following Patent Document 2 and Patent Document 3 disclose the processing method.
JP 2002-346540 A JP 2003-71429 A

In the second treatment method, a solvent for imparting fluidity is added to organic matter-contaminated soil, pulverized with a wet mill, and then added to a cement firing step to produce a cement clinker. By putting the mixed pulverized product of organic-contaminated soil and solvent in a slurry state in the cement firing process, the organic components can be consumed as part of the fuel, and the soil content is part of the cement raw material (part of clay) ) Can be used for the production of cement clinker.
Further, in order to completely incinerate the organic components contained, the place where the pulverized material of the organic matter-contaminated soil is charged is the kiln bottom of the rotary kiln, the calcining furnace provided in the previous stage of the rotary kiln, and the high temperature part of the preheater located in the previous stage of the rotary kiln. At least one of the locations is selected.

  In any of the first and second methods for treating contaminated soil, since pollutants such as oil and volatile organic compounds are incinerated and decomposed at a high temperature portion of 800 ° C. or higher of the cement firing equipment, It can be said that the pollutant is completely discharged without being discharged from the cement burning equipment.

However, the first method, in which the contaminated soil is preheated and the pollutants are removed and used as a cement raw material, requires heating the contaminated soil at a high temperature, and the waste energy of the cement firing facility is always effectively used. It wasn't something to do.
That is, the volatile organic compound (VOC) contained in the organic contaminated soil is, for example, a chlorinated organic compound having a boiling point of 100 ° C. or less, a low molecular weight and a high volatility, and a relatively low molecular weight. The boiling point is up to about 400 ° C. Similarly, lubricating oil has a high boiling point. In order to volatilize organic compounds from the soil containing these organic compounds, the temperature of the heated material during the heat treatment of the organic contaminated soil must be heated to a temperature higher than the boiling point of the volatile substances. It is necessary to heat to 400 ° C. or higher.

For this reason, the temperature of the gas introduced into the heating device needs to be about 800 ° C. or higher, but there is no exhaust gas that can be applied at a low temperature to any exhaust gas discharged from the cement firing facility.
Therefore, for example, when using the clinker cooler exhaust gas, it is necessary to newly use a combustion apparatus for heating, or to extract a part of gas from a high-temperature portion of 800 ° C. or higher of the cement firing facility. .

  On the other hand, the gas discharged from the heating device contains volatilized volatile organic compounds and oil components and cannot be directly discharged to the outside. It was necessary to introduce it into the combustion and decompose.

  Therefore, the use of the high-temperature gas of the cement firing facility in the first treatment method and the introduction of the gas into the cement firing facility for the combustion decomposition of the organic compound in the treated exhaust gas are related to the cement clinker firing efficiency in the cement firing facility. This not only reduces the amount of cement clinker fired, but also does not necessarily lead to effective use of exhaust gas from cement firing equipment.

  Further, the wet pulverization method for contaminated soil, which is the second treatment method, requires a large amount of a solvent such as water to facilitate pulverization with a wet mill. When contaminated soil is pulverized and put into slurry at the bottom of the rotary kiln kiln of the cement firing facility, the temperature of the cement raw material at the bottom of the rotary kiln kiln decreases as the water evaporates, or the cement raw material changes to clinker by firing. There is a risk that the temperature of the zone to be fired (kiln firing zone) will decrease, the quality of the cement clinker to be fired will decrease, and the amount of cement clinker firing will decrease as the amount of gas in the cement firing equipment increases. It was.

  For this reason, any of the above-mentioned methods for treating contaminated soil has a significant effect on the operation of the cement firing facility when the cement firing facility is used as described above, and limits the amount of contaminated soil treated. I had to do it.

On the other hand, flammable waste such as waste tires and waste plastics in cement firing furnaces has been actively treated and used as fuel, and various methods of use have been developed.
For example, in the following Patent Document 4 as a method of using flammable waste, a fluidized bed firing device is installed by branching from a cooler bleed duct connecting a clinker cooler and a calciner of a cement firing facility, There is a method in which a waste containing a flammable substance is burned in a fluidized bed so that the waste is not directly put into the rotary kiln.
JP-A-1-121617

  However, if combustible waste such as waste tires is burned in large quantities, the exhaust gas temperature in the fluidized bed will increase and the heat load may become excessive. It is necessary to limit the heat resistance of the fluidized bed firing apparatus and the exhaust system of exhaust gas from the apparatus.

The present invention has been made in view of the above-mentioned problems in the prior art, and the problem specifically set in order to solve the problem is the operation of the cement firing facility when the contaminated soil is treated with the cement firing facility. Provides a method for treating organic polluted soil that can reduce the burning efficiency of cement clinker and reduce the impact on cement quality, safely treat soil contaminated with organic matter, etc., and recycle it as a raw material for cement clinker There is to do.
It is also an object of the present invention to simultaneously increase the use and treatment of combustible waste in a cement firing furnace.

  In order to solve the above-mentioned problems, the invention according to claim 1 is directed to a method for treating contaminated soil in which contaminated soil is heat-treated and used as a cement raw material. Organic waste containing a flammable substance and the contaminated soil, The waste heat incinerator is simultaneously charged and mixed combustion heated.

  The invention according to claim 2 is the method for treating contaminated soil according to claim 1, wherein the waste heat incinerator is introduced with high-temperature air discharged from a clinker cooler of a cement firing facility, and the waste The exhaust gas discharged from the heat incinerator is introduced into a cement burning facility.

  The invention according to claim 3 is the method for treating contaminated soil according to claim 2, wherein the exhaust gas from the waste heat incinerator is introduced into a calcining furnace or a suspension preheater of a cement burning facility. And

  The invention according to claim 4 is the method for treating contaminated soil according to any one of claims 1 to 3, wherein the waste heat incineration apparatus directly introduces a gas flow from outside the apparatus and raises the temperature. It is a fluidized bed combustion apparatus that discharges a gas flow.

  Further, the invention according to claim 5 is the organic waste processing method according to any one of claims 1 to 4, wherein the organic waste containing the combustible substance is waste tire and / or waste plastic. It is characterized by being.

  Moreover, the invention which concerns on Claim 6 is a contaminated soil processing apparatus using the processing method of the contaminated soil in any one of Claim 1 thru | or 5.

By the invention which concerns on Claim 1, in the processing method of the contaminated soil which heat-processes contaminated soil and uses it as a cement raw material, the organic waste containing a combustible substance and the said contaminated soil are simultaneously made into a waste heat incinerator. In order to heat up mixed combustion, organic waste containing flammable substances is used as a heating fuel to volatilize and decompose pollutants contained in contaminated soil. No need for a heat source.
In addition, the excessive heat load, which is a problem when treating only a large amount of organic waste containing flammable substances, is reduced by the heat of evaporation of moisture contained in the contaminated soil and the heating of the contaminated soil. Mass disposal of organic waste containing substances is also possible.

According to the invention according to claim 2, high temperature air discharged from the clinker cooler of the cement burning facility is introduced into the waste heating incinerator, and exhaust gas discharged from the waste heating incinerator is introduced into the cement burning facility. Thus, compared with a method in which slurry-like contaminated soil is directly put into a conventional cement rotary kiln and treated, there is little influence on cement quality, and exhaust gas discharged from cement firing equipment can be used effectively.
Moreover, since the high-temperature air (calcining furnace secondary air) generated in the clinker cooler usually has a temperature of 700 ° C. or higher, it assists the thermal decomposition treatment of the pollutants in the contaminated soil in the waste heat incinerator. The contaminated soil can be efficiently heat-treated in cooperation with the combustion of the organic waste containing the combustible substance.

In the invention according to claim 3, the exhaust gas from the waste incinerator is clinker cooler by volatilization decomposition of pollutants contained in the contaminated soil, mixed heat combustion with organic waste containing combustible substances, or the like. Since the high-temperature air discharged from is further heated and maintained at a predetermined temperature, it can be suitably used in a calcining furnace, a suspension preheater, or the like of a cement firing facility.
In addition, by introducing the exhaust gas from the waste heat incinerator into the calcining furnace or suspension preheater of the cement firing equipment, it becomes possible to perform high-temperature treatment in the calcining furnace or suspension preheater, and the volatilized contaminants are more complete. It can be decomposed by combustion.

  According to the invention of claim 4, by using a fluidized bed combustion apparatus as a waste heat incinerator, simultaneous and continuous treatment with various types of combustible waste becomes easy, and treatment of contaminated soil and combustible waste is facilitated. Capability can be improved.

  According to the invention of claim 5, since the organic waste containing the combustible substance is a waste tire and / or plastic, it has high combustion efficiency as a combustible substance and is mixed with contaminated soil having a high water content. Even if it does not absorb water, it can be effectively used in the treatment of contaminated soil without lowering the combustion efficiency.

  The invention according to claim 6 makes it possible to realize the excellent effect of the contaminated soil treatment method according to claims 1 to 5 as described above as a contaminated soil treatment apparatus.

Embodiments of the present invention will be described below.
The present invention relates to a method for treating contaminated soil in which the contaminated soil is heat-treated and used as a cement raw material, and the organic waste containing a combustible substance and the contaminated soil are simultaneously charged into a waste heat incinerator and mixed combustion It heats and heats the contaminated soil. Below, it demonstrates focusing on embodiment applied to a cement baking equipment.
In addition, “simultaneous charging” used in the present invention does not mean that the charging is performed only at the same time in time, and if it is within the time range in which the contaminated soil is heat-treated by the combustion of combustible substances. , Including the introduction of both at different times

  FIG. 1 shows a schematic diagram of a cement firing facility used in the method for treating contaminated soil according to the present invention. When using cement calcination equipment for the treatment of contaminated soil, especially if the high temperature exhaust gas discharged from the cement calcination equipment is used, the combustible waste is treated simultaneously with the combustion heat treatment of the contaminated soil. For example, it is not limited to the form shown in FIG.

In FIG. 1, the same components as those in FIG. 3 are denoted by the same reference numerals. In FIG. 1, 8 is a rotary kiln that is a cement firing furnace, 11 is a suspension preheater for preheating cement raw material, 12 is a clinker cooler for cooling the fired cement, 10 is a calcining furnace, and 7 is a kiln bottom. Show.
The high-temperature air from the clinker cooler 12 is circulated and supplied to the calcining furnace 10 by the calcining furnace secondary air duct 9 to be used as secondary air for combustion in the calcining furnace. Reference numeral 15 denotes a cooler exhaust gas duct.

In the present invention, a calciner secondary air bleed line 46 is connected in the middle of the calciner secondary air duct 9 so that a part of the high-temperature air from the clinker cooler 12 is a waste heat incinerator. The exhaust gas is introduced into the fluidized bed combustor 30 and the exhaust gas from the fluidized bed combustor 30 is returned to the calciner secondary air duct 9 through the waste incinerator exhaust gas line 47 again.
With this configuration, the combustible waste is incinerated in the fluidized bed combustor 30 and the high-temperature air sent out by the calcining furnace secondary air duct 9 is heated to a predetermined temperature and used in the calcining furnace 10. It is possible to supply high-temperature air suitable for.
The fluidized bed combustion apparatus 30 is connected to a contaminated soil supply line 45 for supplying contaminated soil, and further connected to a treated soil discharge line for discharging the treated soil after the heat treatment of the contaminated soil.

  In the present invention, in addition to treating contaminated soil and organic waste containing flammable substances such as waste tires and / or waste plastics, sewage sludge, factory wastewater sludge, paper sludge, garbage, and organic It is also possible to mix and use organic waste such as various squeezes containing fibers.

Next, FIG. 2 shows a schematic diagram of a fluidized bed combustion apparatus applied to the present invention.
As the fluidized bed combustion apparatus, it is possible to use the fluidized bed combustion apparatus disclosed in Patent Document 4 and Patent Document 5 shown below.
Referring to the fluidized bed combustion apparatus shown in FIG. 2, the fluidized bed combustion furnace 30 includes a fluidized bed 32, a floating layer 33, an air diffused surface 42 formed at the lower part of the fluidized bed 32, an incombustible material extraction chute 34, and a fluidized bed. It consists of a free board part formed with a floating layer at the top.
Then, by supplying the fluidized air 43 from the air diffusion surface 42 to the fluidized medium in the combustion furnace, the fluidized bed 32 and the floating layer 33 are formed by the fluidized medium, and the combustibles 45 are supplied to the fluidized bed 32 and burned. The
JP-A-6-159616

  In the treatment of contaminated soil in the fluidized bed combustion apparatus applied to the present invention, it is usually preferable to treat waste tires containing a large amount of combustible substances and contaminated soil having a high water content at the same time. The contaminated soil or the like treated in the present invention usually contains 20% or more of moisture.

In a waste heat incinerator that uses high-temperature exhaust gas from a cement firing facility, when heat treating contaminated soil, the waste heat incinerator is generally used due to the evaporation heat of water contained in the contaminated soil or the temperature rise of the contaminated soil. The temperature of the exhaust gas discharged from the apparatus is lower than that introduced into the apparatus. For this reason, in the cement burning equipment having such a waste heat incinerator, when the contaminated soil is heat-treated alone, the contaminated soil that can be heat-treated becomes extremely limited.
In particular, in a fluidized bed combustor, when only contaminated soil is heat-treated with the fluidized bed combustor, there is no combustion heat of organic matter, the temperature of the fluidized bed decreases due to evaporation of the contained water, and a fluidized bed is formed. Becomes difficult, the efficiency of the heat treatment decreases, and in some cases, the heat treatment becomes impossible.

  For this reason, in the present invention, in order to form and maintain a fluidized bed and to treat a large amount of contaminated soil, organic waste containing flammable substances, for example, waste tires, waste plastics, etc. are burned together with the contaminated soil. is required.

The supply of fluidized air in a fluidized bed for effectively performing combustion in a fluidized bed combustion apparatus will be described with reference to FIG.
The fluidized air 43 is not uniformly supplied to the fluidized bed 32 through the air diffusion surface 42, and the amount of air diffused is relatively small, and the amount of air diffused is relatively small relative to the central portion of the reflux atmosphere. Forms the periphery of many oxidizing atmospheres. And a fluid medium will turn (circulate) between both. When the fluid medium forms such a swirling flow, the metal such as the wire contained in the waste tire is cut and rounded to be easily discharged, and the metal is oxidized by reciprocating between the oxidation zone and the reduction zone. Can be advanced.

On the other hand, the contaminated soil introduced at the same time is instantly evaporated and dehydrated in the fluidized bed to prevent the temperature of the fluidized bed from becoming high, and effectively burns combustible waste as a fluidized medium.
The amount of flowing air is preferably about 300 to 600 m ³ / hour or more and about 1000 to 1200 m ³ / hour or less in terms of 1 atm at 0 ° C. per 1 m ² of the hearth area.
When the amount of fluidized air is large, the rising speed of the fluidized gas in the fluidized bed increases, and dehydrated and fluidized contaminated soil having a small particle size is scattered from the free boat. For this reason, when the amount of scattering is large, there is a risk of affecting the cement quality, for example, contaminated soil with coarse particles is mixed in the calcining furnace or suspension preheater of the cement firing equipment, and cement firing becomes insufficient. .
Further, when the amount of fluidized air is small, it is difficult to form a fluidized bed.

Non-combustible materials contained in the combusted material, particularly wire-like iron contained in the waste tire, are oxidized and shredded at a fluidized bed temperature of about 800 to 1000 ° C. and contaminated from the fluidized bed 32 together with the heat-treated contaminated soil. It passes through the soil discharge short 34 and is discharged out of the furnace through the take-out conveyor 35.
The take-out conveyor 35 can adjust the take-out amount by intermittent operation or the like. The discharge chute 34 and the takeout conveyor 35 are cooled by cooling water 48 and are maintained at 200 to 300 ° C. or lower.
The discharged incombustible material can be treated in the same way as ordinary soil because organic pollutants have been removed, and introduced into the raw material mill 1 in FIG. 3 as necessary. However, it can also be used as part of the cement raw material.

In the present invention, it is not necessary to supply a fluid medium, and by using contaminated soil or waste tires, wire or carbonized rubber components that are cut off as the waste tires are burned become fluid media. .
In addition, when the exhaust gas from the clinker cooler of the cement firing equipment is introduced, the exhaust gas is cement clinker cooling air containing cement clinker particles, so that the cement clinker particles can be supplied to the fluidized bed as a fluid medium. The cement clinker has a sintering point and a melting point of 1100 ° C. or higher, is vitreous, has no crystal transformation points such as cracks and SiO ₂ , and can be sufficiently used at a fluidized bed temperature up to 1100 ° C.

In the present invention, the exhaust gas heated by combustion of combustible substances such as waste tires in the fluidized bed is usually introduced into the calcining furnace 10 and used as a heat source, but when the utility value is insufficient as a heat source. The suspension preheater 11 can be used by being introduced into any position of the suspension preheater 11 or the suspension preheater exhaust gas system.
The exhaust gas from the waste heat incinerator contains pollutants from the contaminated soil that has been volatilized. By introducing these exhaust gases into a calcining furnace or suspension preheater of a cement firing facility, the pollutants that have been treated at high temperatures and volatilized can be further completely decomposed by combustion.

Further, the gas introduced into the fluidized bed does not necessarily have to be separated from the calcining furnace secondary air line. For example, the exhaust gas from the cooler exhaust gas duct 15 is separated from the cooler exhaust gas of 200 to 500 ° C. or the atmosphere is introduced. Also good.
The present invention is not limited to the above-described embodiments, and it goes without saying that techniques known in the technical field can be appropriately added as necessary.

As described above, according to the method and apparatus for treating contaminated soil according to the present invention, in order to treat contaminated soil simultaneously with organic waste containing combustible substances such as waste tires and waste plastics, It is possible to safely treat soil contaminated with organic matter and the like by suppressing the decrease in the firing efficiency of cement clinker and the effect on cement quality when treating with a cement firing facility.
Moreover, it is possible to increase the use and treatment of combustible waste in a cement firing furnace. Moreover, the treated contaminated soil can be recycled as a cement clinker raw material, and an industrially useful method and apparatus for treating contaminated soil can be provided.

It is a figure which shows embodiment of the processing method of the contaminated soil of this invention. It is a figure which shows the fluidized bed combustion heating apparatus which is an application example of the waste incineration heating apparatus which is a processing apparatus of the contaminated soil of this invention. It is a schematic diagram which throws in the contaminated soil in the cement baking kiln in the processing method of the conventional contaminated soil.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Raw material mill 2 Cyclone 3 Cement raw material storage 4 Waste storage silo 5 Contaminated soil storage equipment pulverized by wet mill 6 Slurry contaminated soil transport pump 7 Kiln bottom 8 Rotary kiln 9 Calciner secondary air duct DESCRIPTION OF SYMBOLS 10 Calciner 11 Suspension preheater 12 Clinker cooler 13 Electric dust collector 14 Exhaust chimney 15 Cooler exhaust line 16 Electric dust collector 21 Cement raw material supply line 22 Raw material supply line including wastes 23 Cement raw material powder supply line 24 Cement clinker conveyance line 25 Slurry Contaminated soil transport line 30 Waste heat incinerator (fluidized bed combustion heater)
DESCRIPTION OF SYMBOLS 31 Fluidized bed combustion furnace 32 Fluidized bed 33 Floating bed 34 Incombustible material takeout chute 35 Incombustible material takeout conveyor 36 Trommel 37 Incombustible material receiving box 38 Fluid medium circulation elevator 39 Magnetic separator 40 Vibrating sieve 41 Input valve 42 Air diffuser surface 43 Fluid air 44 Replenishment fluid medium 45 Waste supply line such as contaminated soil 46 Calciner secondary air extraction line 47 Waste incinerator exhaust gas line 48 Cooling water inlet 49 Cooling water outlet

Claims (6)

  In the method for treating contaminated soil in which the contaminated soil is heat treated and used as a cement raw material, the organic waste containing the combustible substance and the contaminated soil are simultaneously charged into a waste heat incinerator and mixed and heated. A characteristic method for treating contaminated soil.   2. The method for treating contaminated soil according to claim 1, wherein high-temperature air discharged from a clinker cooler of a cement baking facility is introduced into the waste heat incinerator, and exhaust gas discharged from the waste heat incinerator is cemented. A method for treating contaminated soil, characterized by being introduced into a firing facility.   3. The method for treating contaminated soil according to claim 2, wherein the exhaust gas from the waste heat incinerator is introduced into a calcining furnace or a suspension preheater of a cement firing facility.   The method for treating contaminated soil according to any one of claims 1 to 3, wherein the waste heat incinerator is a fluidized bed combustor that directly introduces a gas flow from outside the device and discharges the heated gas flow. A method for treating contaminated soil, comprising:   The organic waste processing method according to any one of claims 1 to 4, wherein the organic waste containing the combustible substance is waste tire and / or waste plastic. Processing method. The processing apparatus of the contaminated soil using the processing method of the contaminated soil in any one of Claims 1 thru | or 5.

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