KR100870909B1 - A restoration method and apparatus of soil, sand, and gravel polluted by oil - Google Patents

Abstract

A restoration method and apparatus of soil, sand, and gravel polluted by oil through the physical manipulation including the soil, sand, or grave is used in the sea in which the oil flows out, and restores the polluted soil of the region in which the land pollution level is high. The soil or the soil stone polluted in the gasoline is gathered along too in the constant space. The steam is jetted by making use of the steam bar of the high temperature. The surface temperature of the soil polluted by the steam or the soil stone is increased and the stickiness index is lowered. It tries the bubbling method which provides with the air at high pressure if the deintercalation condition of contaminant is satisfied. The low-density contaminant in which the specific gravity is low including the oil treatment reagent etc. is injured with the bubbling method of construction and the pollution source is isolated from the soil or the soil stone, and it washes for restoring.

Description

A restoration method and apparatus of soil, sand, and gravel polluted by oil}

The present invention relates to a method for recovering earth and sand contaminated with oil and an apparatus thereof.

More specifically, the present invention restores mud or sediment that are discharged as oil-contaminated soil from oil transportation pipes in areas where military units or oil storage areas are located, oil-contaminated areas near oil storage areas, or sewage, reservoirs, or dredged soil. A method and a processing apparatus thereof.

For example, when the US military base in Yongsan or Paju relocated to Pyeongtaek, the media reported that the nearby land near the oil depot in the area where the military was located was heavily polluted. There is a debate about whether it is paid by the US or the US.

Also, in recent years, the oil tanker 'Hebei Spirit and the offshore cranes collided off the coast of Taean-gun, Chungcheongnam-do, 12,547 tons of crude oil spilled into the sea, and the sea turned black all over, but many volunteers picked up spilled oil without giving up. The work was reported to the media every day, and more than 1 million people, including 600,000 volunteers, have been reported.

However, with many people's dedication and efforts, oil contaminants that appear dark on sandy beaches or gravel surfaces may be considered to have been removed to some extent, but to remove the contaminants that are layered under sandy beaches or gravel, This wiping method is no longer applicable and is now working on sand or gravel with sand forkrain, but this is the result of trying to wipe oil contaminants back into the sea water in a short time. It is a dangerous idea that can not remove the source of pollutants by blinding and meowing to obtain it, as well as bringing greater disaster to mankind in terms of global environmental pollution.

Applicant has been researching in various fields to restore the contaminated soil, and applied for a patent application as patent No. 59-23159, registered as a registered patent 59922, and applied for a patent as patent 2005-27481, registered as a registered patent 624444, patent Patent application was filed in 2007-20051 and registered as a registered patent No. 755910. Looking at the work situation of oil pollution accidents on the west coast, which is a major national concern, the existing application technology is improved and applied to the west coast pollution accident site. The technical idea of this application is to restore the mud or earth and sand discharged from the sewage, reservoir, dredged soil, etc. Restoration method, area where oil transportation pipes of various military units are buried or Yongsan, Seoul It is a technology that can be usefully applied to restore soil and soil from various contaminated areas such as contaminated soil near oil storage sites at US military bases.

Applicants looked at the volunteers of the West Coast Oil Pollution Control Worker who are reported to the media every day, and it seemed to be effective in removing the apparent pollution of the white sandy beaches and stones. The removal of oils permeated into the bottom of small grains of sand, oils dug between small gravel cracks, and cracks between cracked stones is still in a limit situation where it is not possible to wash the contaminants between the grains of sand by hand. In the situation where there is no clear countermeasure to remove oil remaining more than half or two thirds, oil component, small infiltrate into sand of small particles of sand by using mechanical device Efficiently removes oil content between cracks and cracks. It confirmed that can perform the control operation to have the background of the invention leads to the application.

In the past, the techniques used in oil pollution control workshops for the West Coast are taken as examples, and the most conventional tools used in the control operations to date are nonwoven fabrics, which have been absorbed by volunteers on the beach.

The oil absorbent is a kind of compressed cotton made of polypropylene (PP), a synthetic resin, which is called needle punching. It is a complex entangled fiber that has a very large surface area, so it absorbs oil effectively. Because it dislikes oil, it only sucks oil when it is thrown on the floating sea, and it is used as the best tool in the control work where people directly wipe and steal oil. It has been used to remove.

In addition, some dispersants are used, dispersant is a solution that mixes water and oil. When spraying dispersant, the oil is mixed with water and turns like milk. When you look under a microscope, fine oil droplets are dispersed among the water. Although it disintegrates and evaporates faster than oil in agglomerated oils, dispersants can cause greater environmental pollution problems. The toxicity of paint as a raw material for oil spills in Yeosu offshore in 1995 The use of dispersants made of strong emulsifiers has been reported to adversely affect the ecosystem.

There is also a method of using microorganisms to purify the soil in oil-contaminated areas.By cultivating a large amount of microorganisms that eat and grow oil, and spraying them in the sea, microorganisms continue to multiply as long as oil remains in the sea. Although oil can be removed, it is premature for this method to be commercialized. Microorganisms such as Mycobacterium and Sphingmonas, which are currently being developed by Korea Maritime Research Institute, grow well in the laboratory, but die quickly when sprayed into the sea. It's a reality that hasn't helped much yet.

The current status of oil pollution accident control work on the west coast is that the appearance of external pollution was wiped with oil adsorbent by human force. To remove oils, digging through small gravel cracks, and oils trapped between cracked stone cracks, the current method is irrelevant, and more than half of the oil remains in the sun. It is reaching the limit that it is not able to find a solution because it is expected to solve the time, expecting to disappear naturally over the long term by the share of the microorganisms.

Ultraviolet rays in the sunlight decompose the oil component, which acts as a catalyst, which is called photodegradation. With the help of ultraviolet rays, oil in rocks or sand is gradually decomposed and volatilized.

In addition, it is the microorganism that ultimately decomposes the remaining oil component. When volatiles fly, aliphatic hydrocarbons and aromatic hydrocarbons remain, and microorganisms that decompose aliphatic hydrocarbons decompose relatively quickly because there are many kinds. The number of microorganisms is relatively small, which takes a long time to decompose.

As described above, the method of wiping people using sorbent cloths as a prior art is no longer applicable, and a method of using a dispersant or a chemical made of a highly toxic emulsifier is used for the ocean. Secondary pollution problems continue to be polluted, but in the long term, they have a negative effect on the natural ecosystem, and the West Coast, a natural natural ecosystem protection area that waits for 20 to 30 years indefinitely, believes in photolysis and natural degradation by microorganisms. Due to the depletion of fish stocks, the loss of the lives of local residents on the west coast has led to patent applications, considering that the technical ideas of the present company can greatly assist the restoration project.

The present invention is a restoration method for treating soil in oil contaminated areas near various military units, oil transportation pipes or oil storage areas, or a restoration method for restoring mud or soil discharged in an oil-contaminated state from sewers, reservoirs, or dredged soil, In addition, the invention started with the task of finding a technology that can be applied to a wide range of restoration methods for restoring soil and aggregates in oil pollution areas such as oil tanker pollution off the west coast.

Applicant is a means for solving the above problems, as a means for restoring the mud, soil or gravel layer discharged in the state of heavy metal contaminated in the soil, sewage, reservoir or dredged soil of the oil-contaminated area near the oil transport pipe or reservoir, Collect objects to be treated such as soil or soil gravel in the contaminated area, collect the objects to be restored in one place, and plug the steam bar to inject high temperature and high pressure steam into the objects. As a means of lowering the viscosity of oil components or adsorbates with high viscosity by increasing the surface temperature of soil or soil, it is satisfied by the method of bubbling by injecting high pressure air. It is an invention to use a technical idea that can remove and remove low specific gravity pollutants such as oil.

Therefore, the present application has an object of the present invention to provide a method and apparatus for restoring earth and sand contaminated with oil based on the above technical concept.

In general, the fuel oil of diesel or gasoline system has low viscosity, so it has good fluidity regardless of temperature, and when released into the atmosphere, it volatilizes quickly. And sand, gravel and the like attached to the soil.

At present, most of the oil spilled from US military units or military units is heavy oil in the fuel system, and the oil released from the West Coast tanker accident is an unrefined crude oil.These oils increase in viscosity when the temperature decreases, resulting in loss of fluidity. Since it has a property that does not desorb, if you want to desorb it is necessary to reduce the viscosity.

 The present invention is a decontamination means of oil pollution in consideration of the above-mentioned oil characteristics, collects restoration objects in one place and inserts a steam bar to inject high-temperature and high-pressure steam into the restoration objects. It is to satisfy the desorption condition of contaminants from the object to be restored by increasing the surface temperature of contaminated soil or soil and reducing the viscosity of highly viscous oil components or adsorbents. It is also possible to use a method of injecting high-temperature steam by putting a steam bar for injecting high-temperature and high-pressure steam into the collected objects in the same place, but in this case, first, the restoration object is placed in a container (container). By spraying steam, soaking people in the bathroom's hot tubs It is a technical idea to use the method of decontamination by polluting by blowing high pressure air after the desorption condition is satisfied and the desorption condition is satisfied. In the present application, this apparatus having a soak function + desorption function is called hereinafter. I want to use it named Talijo.

Means for implementing the technical idea may be presented in various ways, but in the configuration of an embodiment herein, called talijo is provided in a closed structure, whether the side portion is provided in a circular or square, or as a dump truck It may be provided to have an open structure for discharging the contents to one side, and the bottom portion has a support for supporting the vertical pipe of the steam supply, and is called. One side of the tally tank for supplying hot steam or air The supply pipe is provided horizontally and vertically, the horizontal pipe has a function of supplying steam or air to the vertical pipe, the vertical pipe has a hole in a plurality of places (hole) to supply steam or air to the restoration object, The bottom of the vertical pipe is provided in a configuration fixedly supported by the support of the bottom, and called the upper internal combustion of the tali Open to can perform the basic functions of the herein referred to. Desorbed tank structure having a configuration that includes a month ryupan and discharge line for discharging a low proportion of oil contaminants to the outside in its default configuration.

In other words, the technical concept of the present application is a means for restoring the oil-contaminated soil around the military unit, or the mud, soil, or gravel layer discharged in an oil-contaminated state in sewers, reservoirs, or dredged soils. Collecting and restoring objects such as soaking in the desorption tank and spraying high temperature and high pressure steam on the restoring object to increase the surface temperature of contaminated soil or earth and stone to lower the viscosity to meet the desorption condition of contaminants in the restoration object. After adding some water to the desorption tank and supplying high pressure air, it is possible to desorb oil contaminants with low specific gravity by means of bubbling and discharge them through the upper wall plate to the discharge line. The restored object first refined in the tally tank is sent to the vibrating screen processing unit, for example, 5mm or more. Aggregate minutes and foreign matter is selected classification to one side, the soil or the soil of less than 5 minutes ㎜ is a technical concept to be used as a high quality soil riprap to remove residual components of the oil, while performing a cleaning process.

If the object to be contaminated in the treatment process of the present application has a gravel layer of a certain particle size or more, it is first crushed with a jaw crusher or a corn crusher and crushed below the grain size to be interposed between the cracked oil components and cracked stones. The restoration object may be crushed and put into a soaking and desorption tank so as to remove the contaminant, or as described above, after performing the first purification process in the soaking and desorption tank, aggregates and foreign substances having a predetermined particle size or more in a vibration screen treatment tank After filtering, remove foreign substances such as wood chips or vinyl, and then shred them with jaw or corn grinder and shred them below the grain size, so that they can be recycled by sending them back to the tally tank.

In the present invention, the physical treatment means applied for the restoration of soil contaminated with oil is described in each step. First, the soil or sand in the contaminated area is collected and loaded into a soak. The desorption tank is connected to a steam supply pipe for supplying high temperature steam, and is provided with a device having a hole for supplying high temperature and high pressure steam, and the high temperature and high pressure steam ejected through the injection port is restored. Steam spraying step of melting and soaking by lowering the viscosity by increasing the surface temperature of the contaminants; As a means of injecting and bubbling high-pressure air into a restoration object mixed with water generated by cooling the injected steam, low-floating suspended solids, including oil content, are separated from the restoration object and transferred to the oil / water separation tank through the overflow plate and the discharge line. Transferring the primary purified object to a vibrating screen; The restoration object transferred to the vibrating screen is provided with a plurality of high-pressure water jet nozzles on the upper side of the vibrating screen to spray the washing water, and the separation is performed by particle size. Separated from the upper part of the screen and transported to a separate treatment tank, soil or fines of less than 5mm are collected through the screen to the lower storage tank, which is sent to the washing rinsing device with a high-pressure dredging pump, The oil component can be removed to provide a high quality restored soil stone.

The washing process is sent to the washing rinsing device can be applied to a variety of known methods, for example, the washing method and the separation method disclosed in the applicant's patent registration No. 59922, 624444, 755910 Can be.

In addition, the cleaning means applied to the present invention, in addition to the embodiment of the applicant's prior patent application technology to wrap the sorbent cloth of polypropylene (PP) material on the eccentric shaft to achieve an embodiment of rubbing and rubbing the barley rice as much as possible To restore the object to the desired property by using a means for rotating it, and / or adding a means for recovering and transporting only the suspended matter as it is rotated and cooked to obtain a restoration object such as soil or sand having a desired particle size. The precision cleaning process according to the characteristics of the can be added and applied, and the oil-water separation process for the separation of the oil content being conveyed from the so-called desorption tank of the present application is fully disclosed in the applicant's prior registered patent.

In addition, it is difficult to create a new wastewater treatment plant at the time of application of the patented technology at the site of the oil tanker pollution accident on the west coast, and if it is temporarily needed, a mobile wastewater treatment plant or a wastewater purification plant with a sedimentation tank is available. The ability to transport and dispose of the float to the facility is a natural technique for those skilled in the art.

The present invention has the effect of providing technical ideas that can be used to clean up the contaminated soil in high-contaminated areas near the oil reservoirs of Yongsan Base, where USFK has left, or as a useful rehabilitation facility, such as an oil tanker accident site off the west coast.

At present, there are still a lot of volunteers gathering at the West Coast oil tanker accidents to pick up oils stuck in the gravel and rock gaps. In the absence of further measures to remove the oil content between the stone cracks, the oil component penetrated into the sand of the small particles of sand, between the small gravel cracks, and the cracked stone cracks, using mechanical cleaning means and devices, is no longer possible. It has the effect of removing it.

In addition, the present application also has the effect of obtaining the aggregate of the desired particle size by the screening, crushing, sieving the quality aggregate in addition to the oil pollution removal work.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings as well as an embodiment in which the technical spirit of the present application is implemented.

Figure 1 is intended to show a so called talali bath that can perform the basic functions of the present application, Figure 1a shows a perspective view of the soak talali bath 100 of the present application, Figure 1b shows the internal structure of the soak. Figure 1c is a longitudinal cross-sectional view for showing, Fig. 1c is a lateral cross-sectional view for showing the internal structure of the so called. Talijo, the so-called ellipsis of the present application, the side portion 110 is shown in a rectangular sealed structure One side may be provided to have an open structure for discharging the contents to one side, such as a dump truck, the bottom portion 120 has a support 121 and a drain port for supporting the vertical pipe of the steam supply ( 122) and has a horizontal pipe 130 and a vertical pipe 140 for supplying steam and air to the soaking and degassing tank 100 and overflows oil contaminants to the upper side of the soaking and degassing tank. It is provided in a configuration including the overflow plate 150 and the discharge line 160 for discharging.

On the other hand, the present application. The steam tank 170 and the air tank 180 are separately installed as a device for supplying high temperature steam and air to the desorption tank 100, their supply pipes to distribute the steam and air For example, when the steam supply to the dispensing chamber 175 is connected to the dispensing chamber 175, the air supply valve 181 is closed and the steam supply valve 171 is opened to supply steam to the disintegration chamber. The end of the high pressure hose 176 connected to the distribution chamber 175 is connected to the joint fastening portion 131 of the horizontal pipe 130, and the horizontal pipe 130 supplies steam or air to the vertical pipe 140. The vertical pipe 140 functions as a steam bar having injection holes 141 at a plurality of places to supply steam to a restoration object, for example, a human body in a hot tub of a bathroom. To function as a contaminant, as if to call a time when After the desorption condition is satisfied, this time, the steam supply valve 171 is closed and the air supply valve 181 is opened. The air spraying bar blows high-pressure air to the desorption tank and functions to desorb contaminants. will be,

Meanwhile, the desorbed oil contaminants float to the upper portion simultaneously with the bubbling of air and are discharged to the oil / water separation tank 190 through the overflow plate and the discharge line to perform a known oil-water separation process.

FIG. 2 is a flow chart of an embodiment for restoring the soil contaminated with oil using the soaking and desorption tank of FIG. 1.

The present application is to provide a restoration method having the purpose of restoring the soil soil contaminated with oil, and a device required therefor. Referring to FIG. 2, the treatment system will be described. The sandstone is called in the desorption tank 100, and is primarily called the desorption tank 100, and a high temperature and high pressure steam is injected into the loaded restoration object to inject high temperature steam. By increasing the surface temperature of contaminated soil or soil, the viscosity of oil component or adsorbate with high viscosity is lowered. After the primary purification process is used, the restoration object is introduced into the hopper 210 of the transfer tank 200 and separated by the particle size through the primary conveyor belt 220 and the secondary conveyor belt 230. Send to the vibrating screen tank 300 for the distribution feeder 240 is installed to send in a certain amount.

In the vibrating screen tank 300 may be installed in a multi-stage to classify the transferred object to be restored by particle size, in the present application will be omitted the description of the parts that are not the subject of the present application to avoid complexity, vibrating screen 300 A plurality of high-pressure water jet nozzles 310 are installed on the upper side to spray washing water, and separation by particle size is performed. For example, a particle size classification process is performed, and particles and foreign substances of 5 mm or more are separated into the upper part of the vibrating screen. And is transported to a separate storage tank or treatment tank by a separate transfer conveyor A (320), the soil or fines of less than 5mm is collected through the screen to the lower storage tank 330, dredging pump in the lower storage tank (330) The high pressure vortex generation pump 340, such as built-in restoring object (sediment) and water that did not go to the bottom can be transferred to a high pressure with a washing rinse apparatus to perform an additional cleaning process. It is

The high-pressure vortex generating pump 340 may be a pump used as a dredging pump in rivers or rivers, while the blade rotates to a high pressure inside the pump while vortex caused by the blade to the contents while transporting the soil or sand as a high pressure It is intended to transfer while desorbing the remaining oil component by giving a shock, so that the discharge unit 350 of the pump pipe is provided with a zigzag blow plate 360 is strongly restored to the blow plate 360 to the object to be introduced at high pressure While bumping, the removal efficiency of residual oil components is increased, and the water flows into the bibim washing tank 400 while sequentially descending along a zigzag flow path.

In FIG. 2, the restoration object that has undergone the second purification process in the vibrating screen tank 300 is transferred to the bibim washing tank 400, subjected to the third purification process, and then again subjected to the fourth purification process in the rinse washing tank 500, and Although it is shown that the final separation process in the dehydration tank 700 after the fifth purification process in the purification tank 600, these cleaning processes can be selectively used to the last depending on the nature and characteristics of the object to be restored.

Referring briefly to each cleaning step illustrated as applicable in Figure 2, after the second refining process in the vibrating screen tank 300 hit the impact plate 360 strongly and then flow along the zigzag-shaped flow path turbulence Restoration objects flowing quietly into the non-bimb washing tank 400 without forming a non-beam washing tank while the restoration object is transferred between the screw 410 compatible with the rinse process at the same time, while the third refining process is carried out between the screws The process may be transferred to the rinse tank 500, the rinse tank 500 can be carried out by the fourth step of purification by rinsing off the oil or heavy metal components detached from the water while being literally vibrated in water. Indicates.

A second high-pressure vortex generating pump 520 is installed in the rinse tank 500 to transfer to the cooking tank 600, which is the next process, to perform the fifth purification process. The blow plate 530 of the shape is provided so that the restoration object introduced at a high pressure hits the blow plate 530 strongly and then flows down along the zigzag-shaped flow path to calmly flow into the cooking quality cleaning tank, cooking quality cleaning tank 600 ), The rotary plate 610 having a multi-stage inclined plate rotates to be dehydrated by pouring a small amount to each of the inclined plates to be dehydrated as if cooking a restoration object that has sunk into the bottom. It is shown.

 Dehydration tank 700 is a classification process to obtain the final product by classifying the soil to be restored in the present application, dehydration tank 700 is the screen dehydration unit 710 and cyclone 720 and the upper screen It is configured to have a conveying conveyor B (730) for discharging the restoration object to the outside of the cleaning plate 600 of the cleaning tank 600 is dropped into the cleaning restoration object is introduced into the upper portion of the screen dehydrator rotating to one side The dehydrated object from the upper part of the screen is sent to a storage tank or a recycling place by a separate conveying conveyor B 730, and water and particulates falling to the lower part of the screen are pumped back to the cyclone 720 and settled to the lower part of the cyclone. Particulate matter is again dropped to the upper part of the stack first filtered on the upper screen, showing a technical configuration that can be applied to the configuration that can recover the particulate matter also There.

In the above process, the outer wall of each of the vibrating screen tank 300, the bibeam washing tank 400, the rinse washing tank 500, the cooking quality cleaning tank 600, and the overflow plate to discharge the low specific gravity suspended pollutants to the outside and The low-density floating contaminants having a configuration including a discharge line are transferred to the float treatment tank 800, and the low specific gravity floating contaminants transferred to the float treatment tank are transferred to the sedimentation tank 810. In the sedimentation tank, flocculants are added to the fine soil and suspended matter. Of course, the method may be applied to precipitate, agglomerated and dehydrated the dissolved heavy metal powder, or processed by a consignment to a professional consignment processor. Since it is already disclosed in detail in Nos. 59922, 624444, and 755910, it is an opinion that those skilled in the art will not have any questions about the practice of the present application Applicant's pre-registered patent technology can also be applied to the restoration method and restoration apparatus of the present application.

Figure 1a: called soaking to perform the basic functions of the present application.

Fig. 1b: Cross sectional side view for showing the internal structure of the soaking bath.

Figure 1c: longitudinal cross-sectional view for showing the internal structure of the soak.

2: Process flow diagram of an embodiment using the soaking and desorption tank of FIG. 1.

** Description of the main symbols in the drawings **

100: soak and tallyzo 110: side portion of soak and tallyzo

120: bottom of the talizo 121: support

122: drain 130: horizontal piping

131: joint connection 140: vertical piping

141: injection hole 150: moon plate

160: discharge line 170: steam tank

171: steam supply valve 175: distribution chamber

176: high pressure hose 180: air tank

181: air supply valve 190: oil water separation tank

200: transfer tank 210: hopper

220: 1st conveyor belt 230: 2nd conveyor belt

240: distributed feeder 300: vibrating screen tank

310: injection nozzle 320: transfer conveyor A

330: lower reservoir 340: high pressure vortex generation pump

350: discharge portion 360: blow plate

400: bibide washing tank 410: screw

500: rinse bath 600: cooking quality bath

700: dehydration tank 710: screen dehydration unit

720: Cyclone 730: Transfer Conveyor B

Claims (8)

In the method of restoring the soil contaminated with oil, A first step of collecting and reconstructing the object to be recovered from the earth and sand in the contaminated area; The elimination tank is provided with a steam bar having a plurality of holes for supplying high temperature and high pressure steam in connection with the steam supply pipe. A second step of lowering the viscosity of contaminants attached to the restoration object by ejecting steam at a high temperature and a high pressure through the melt; A third step of separating the oil and the low specific contaminants and the restoration object by means of bubbling by spraying high pressure air to the restoration object mixed with the water generated by cooling the steam; A fourth step of transferring the oil and the low specific gravity contaminants separated in the third step to the oil-water separation tank by overflowing the overflow plate; A fifth step of transferring the restoration object to the washing process after the restoration object separated in the third step is transferred to the vibrating screen and separated by particle size; A sixth step in which the restored object transferred in the fifth step is subjected to a washing process in a washing tank, and then the purified restored object is sent to a dehydration separation tank, and low specific gravity floating contaminants are transferred to a floating material treatment tank; A seventh step of performing a classification process in which the purified restoration object transferred in the sixth step is finally classified into soil for restoration in a dehydration tank; Restoration method of soil contaminated soil, characterized in that comprises a. The method of claim 1, The steam bar used in the second step (steam bar) is used as the air supply bar used in the third step, the method of restoring contaminated soil stone characterized in that used. The method of claim 1, And restoring the contaminated soil stone by adding hot water in addition to the water generated by the cooling of the steam steam in the third step. The method of claim 1, In the fifth step, when the restoration object is transferred to the washing process, the desorption efficiency is increased by using a high pressure vortex generating pump, and a zigzag blow plate is installed at the discharge portion of the conveying pipe to increase the separation efficiency of residual oil components. Restoration method of soil contaminated soil, characterized in that provided. The method of claim 1, The washing process performed in the sixth step is provided with a diffuser installed at the bottom of the washing tank to increase the washing efficiency by blowing air in the water, and a transfer screw having an inclination angle is installed in the middle of the washing tank to restore the restoring object. Transport and discharge to A high pressure water spray nozzle is installed on the upper surface of the washing tank to push out contaminants that floated to the top of the water to one side, and the overflow plate and discharge line for overflowing low specific gravity floating contaminants to the outside of the washing tank. Method for restoring soil soil stone, characterized in that the cleaning process is performed having a configuration comprising a. The method of claim 1, The low specific gravity floating contaminants overflowed from the vibrating screen tank used in the fifth step and the washing water tank used in the sixth step are transferred to the settling tank and added with flocculant to precipitate and aggregate the fine soil content and heavy metal powder dissolved in the suspended matter. A method of restoring contaminated soil stone, characterized in that the dewatering and then caked. The method of claim 1, The dewatering separation tank used in the seventh step has a screen dehydration unit and a cyclone, and the screen dewatering unit is primarily screened with a restoration object of more than the screen size, and the fine precipitate that is not filtered from the screen is pumped back to the cyclone. A method of restoring contaminated soil stone, characterized in that a sorting process is performed in which the particulate sediment settled to the cyclone bottom is secondly raised from the screen dewatering portion to the upper portion of the accumulated substance and discharged to the outside. In the soaking and desorption tank, the high temperature and high pressure steam or air is supplied to contaminated soil or soil to remove the contaminants. The side part of the tally tank is closed or partially open and has a support part for supporting a steam supply pipe at the bottom part, and one side has a supply pipe for supplying hot steam or air horizontally and vertically. It has a function of supplying steam or air to the vertical pipe, and the vertical pipe has a hole to supply steam or air to the restoration object in a number of places, and the bottom of the vertical pipe is fixed to the support of the bottom part. It is provided in a configuration that is, called. Talijo top rim of the talijo, characterized in that it is provided in a configuration comprising a overflow plate and a discharge line for overflow discharge the low specific gravity contaminants.

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