KR101396416B1 - The washing apparatus of oils and heavy metals contaminated soils using thermal stress crushing, the remediation system of oils and heavy metals contaminated soils comprising thereof, and remediation method of oils and heavy metals contaminated soils comprising thereof - Google Patents

Abstract

An aspect of the present invention is to provide an apparatus for the simultaneous elution of oil and heavy metal in combined pollution soil that is capable of efficiently removing not only the oil but also the heavy metal by allowing the thermal effect of high-temperature and high-pressure steam and the chemical desorption effect for removing the oil or the heavy metal to act complexly based on friction crushing following a physical friction of a friction pulverization unit. The apparatus for the simultaneous elution of oil and heavy metal in combined pollution soil using thermal stress crushing according to this embodiment of the present invention including a chemical tank that provides a cleaning agent for the chemical treatment of soil subjected to combined pollution due to oil and heavy metal; a heater that supplies steam and hot water at the same time for the thermal treatment of the combined pollution soil; and a friction pulverization unit that performs a physical treatment through the induction of collision and friction between combined pollution soil particles and is based on the thermal treatment and chemical treatment while using the cleaning agent provided by the chemical tank and the steam and the hot water provided by the heater.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and method for simultaneous desorption of oil and heavy metals in a complex contaminated soil using thermal strain fracture, and the remediation method of Oils and Heavy metals contaminated Soils comprising thereof,

The present invention relates to a simultaneous desorption apparatus for oil and heavy metals in a complex contaminated soil, and a purification system and a method for purifying a complex contaminated soil comprising the same. More particularly, The combination of the thermal effect of steam and the chemical desorption effect of a cleaning agent for removing oil or heavy metals enables the oil and heavy metals to be efficiently removed through an environmentally friendly process. The present invention relates to a simultaneous desorption apparatus for heavy metals, and a purification system and method for a complex contaminated soil containing the same.

In general, environmental pollution can be classified into air pollution, water pollution, and soil pollution. Among them, soil pollution poses a serious threat to food production, and also pollutes the groundwater as well as groundwater pollution. Contaminated soil needs to be cleaned up early.

In recent years, soil pollution in Korea is mainly caused by unauthorized landfill or leakage of liquid wastes. In addition, it is caused by the underground diffusion of ground - level objects left in the course of long - term industrial activities. It is caused by various kinds of chemical species rather than single species compounds. Representative complex pollution occurs in most industrial activity areas in the form of oil and heavy metals.

Methods for recovering contaminated soil can be classified into physical methods such as soil washing, incineration, solidification, stabilization and solvent extraction, and biological methods such as soil cultivation, composting, bio-venting, and plant restoration. Among these methods, it is relatively easy to recover soil contaminated easily and is a soil washing method.

The contaminated soil washing method is a technique of using a proper detergent to weaken the surface tension of the harmful organic pollutants bonded to the soil particles or to separate them from the soil particles by changing the heavy metal to liquid, And can be applied regardless of the kind of the pollutant.

The soil washing method is divided into an in-situ method and an ex-situ method. In-situ method is a method to remove contaminated soil without washing solution injecting solution, washing solution discharging solution, washing effluent treating solution, (Soil Flushing), which is a soil flushing method in which volatile substance treatment facilities are installed on contaminated sites and the contaminated soil is directly circulated by circulating the cleaning agent in the contaminated soil to be treated. As a result, the treatment time is long, Because there are no disadvantages, the soil washing method is mainly applied to the Ex-situ method.

The Ex-situ method is used to determine the distribution of pollutants in the soil and the physical / chemical characteristics of the soil, excavate the contaminated soil to be treated, and then use the appropriate detergent to remove the contaminated soil As a method of washing, it is used as a recently generalized soil washing method.

Conventional soil washing methods are used to select and wash the contaminated soil in multiple steps to remove various contaminants including oil and heavy metals attached to the contaminated soil, thereby restoring the soil. Korean Patent No. 10-0534067 (Restoration of Contaminated Soil And a soil washing method and apparatus for sorting were proposed.

In the prior art, the contaminated soil is sorted through a dry sorting step and a high pressure spraying step, and then washed in a primary washing tank and simultaneously discharged and discharged into a flooded soil containing a large amount of contaminants and immersed soil containing a small amount of contaminants , The separated soil is washed and separated into fine soil and granular soil simultaneously with washing in the secondary washing tank, and the granular soil is dehydrated and reduced to the restoration soil. The fine soil is precipitated, flocculated and dehydrated together with the suspended soil discharged from the primary washing tank It is a technology to make waste sludge by the process and neutralize and clean the polluted cleaner.

Such conventional prior arts are characterized in that after the soil particles having a large particle size are selected in the dry separator and the high pressure spraying separator, the cleaning process is performed in the primary and secondary washing tanks, and then the fine soil and floating soil generated in the washing process are discarded So that the second environmental pollution is caused by waste. In particular, pollutants adsorbed on the particulate soil can not be effectively removed.

In addition, when the metal component is strongly bonded to the soil particles only by the conventional soil washing technique, if the density and surface characteristics of the metal-containing soil and the non-containing soil are not clearly distinguished, If the technique is difficult to apply, if the heavy metals are combined with soil particles of various sizes, or if the silt / clay content exceeds 30-50% or the soil with high humic content, There is a problem that it is difficult to effectively remove contaminants adsorbed on the soil.

Particularly, in the conventional soil cleaning technology, when the soil to be applied contains a large amount of micro-soil, the purification efficiency is low. This is due to the characteristic of the micro-soil in which the specific surface area is high and the adsorption site is abundant, It is difficult to desorb the oil and the inorganic contaminants through the purification method because the contaminants are more strongly adsorbed.

In addition, in the case of purifying soil contaminated with heavy metals, acid pickling using a large amount of acid was mainly applied so far, which is disadvantageous in terms of economy, environment friendliness, workability and safety.

Korean Patent Registration No. 10-0903593 Korean Patent Publication No. 10-2010-0102771 Korean Patent Publication No. 10-2010-0077479

An aspect of the present invention is to provide a method for treating a soil which is capable of simultaneously removing low volatile oil by applying heat and capable of improving heavy metal treatment efficiency by physical, chemical, and thermal mechanisms, The present invention provides a simultaneous desorption apparatus for oil and heavy metals in a complex contaminated soil using crushing, and a system and a method for purifying a complex contaminated soil containing the same.

Another aspect of the present invention is that it is not necessary to pick up the pickle during the cleaning process and also does not discharge the wastewater that may be generated during the cleaning in the middle of the cleaning process so that the environmentally friendly and cost- And a system and method for purifying complex contaminated soil containing the same.

Another aspect of the present invention is to provide a simultaneous desorption apparatus for oil and heavy metals in a complex contaminated soil by thermal deformation fracturing which can be easily applied to a purification process of a complex contaminated soil, And to provide a system and method for purifying complex contaminated soil.

A system for simultaneously removing oil and heavy metals from a composite contaminated soil using thermal deformation fracturing according to an embodiment of the present invention includes a chemical tank for providing a cleaning agent for chemical treatment of a soil contaminated with oil and heavy metals, A heater for simultaneously providing steam and hot water for thermal treatment, and a physical treatment through induction of collision and friction between the contaminated soil particles, wherein thermal treatment is performed using steam and hot water supplied from the cleaning agent and heater provided in the chemical tank And a friction grinding unit based on a chemical treatment.

The frictional pulverizing unit may include a main body having an outer tube formed with a steam inlet for introducing steam supplied from the heater at an upper side thereof and a cleaning agent provided in the chemical tank, And a driving shaft having an impeller disposed longitudinally in the cleaning agent receiving portion of the main body to perform friction cleaning of the contaminated soil, A water storage portion formed at the bottom of the main body to receive the hot water provided by the heater, and a water storage portion disposed at the bottom of the inner wall of the detergent receiving portion so as to be adjacent to the impeller, And a resistive plate installed on the ground to perform friction cleaning of the contaminated soil.

In addition, the impeller simultaneously performs the attrition process and the breaking process on the contaminated soil particles by high-speed rotation, induces the temperature rise through the friction heat caused by the collision with the contaminated soil particles, Thereby increasing the fluidity of the fluid.

Further, the friction grinder unit is characterized by including an attrition scrubber.

The chemical tank may include a first chemical tank containing a surfactant for enhancing the activity of the soil particle interface, a chelating agent for leaching the heavy metal cation bound to the soil particles to form a complex to prevent the soil particles from being recombined with heavy metals, And a third chemical tank containing an oxidant for oxidizing and decomposing contaminants bound to or separated from the soil particles.

The apparatus for simultaneous cleaning of oil and heavy metals according to the embodiment of the present invention is characterized in that the soil subjected to complex contamination with oil and heavy metal is fused with a physical treatment based on friction grinding and a chemical treatment based on a cleaning agent and a thermal treatment based on thermal energy input, And removing oil and heavy metals from the soil at the same time with the process omitted.

The present invention relates to a system for purifying a complex contaminated soil, comprising: a feeding device for quantitatively supplying a contaminated soil; and a control device for controlling the concentration of the contaminated soil supplied from the feeding device with a fine slurry, A method of separating the soil slurry introduced from the oil and heavy metal simultaneous desolvation apparatus by using a magnetic separator to separate the first treated soil and the first treated soil by using a magnetic separator, An oil skimmer for removing oil components contained in the supernatant of the soil slurry introduced from the vibration screen; and an oil skimmer for separating the soil slurry larger than the first reference particle size from the oil slurry introduced from the oil skimmer, A first height selecting device for selecting a first height to produce a second magnetic soil; And a second height for generating a second treated soil and a heavy soil by sorting the second soil into a second soil having a second larger particle size than that of the second soil, A first sorting device for sorting the soil and a second sorting device for sorting the sorted soil and the second sorting device; And a water treatment apparatus for water treatment.

Also, the simultaneous desorption of oil and heavy metals includes a chemical tank for providing a cleaning agent for chemical treatment of soil contaminated with oil and heavy metals, a heater for simultaneously providing steam and hot water for thermal treatment of the contaminated soil, And a friction grinder for frictionally cleaning the mixed contaminated soil for physical treatment using the washing agent provided in the chemical tank and the steam and hot water provided in the heater.

The first altitude sorter may further include a first hydrocyclone for performing particle size separation to discharge particles smaller than the first reference particle size to the first A discharge port and discharge particles larger than the first reference particle size to the first B discharge port; A magnetic filter for selecting the magnetic force of the fine heavy metal particles larger than the first reference particle size discharged from the first B discharge port of the first hydrocyclone, and a magnetic filter for separating moisture from particles larger than the first reference particle size selected by the magnetic filter And a first dehydrating screen for dehydrating the dehydrated water to produce a second magnetic soil and providing dehydrated water to the oil skimmer.

The second altitude sorter may further include a second hydrocyclone for performing particle size separation to discharge particles smaller than the second reference particle size to the second AE outlet and discharge particles larger than the second reference particle size to the second B outlet A spiral weight separator for separating heavy metals and fine particles from particles larger than a second reference particle size discharged from the second discharge port of the second hydrocyclone, A second dehydration screen for dehydrating the dehydrated water to produce a second treated soil and providing dehydrated water to the micro-soil tank; and a second dehydration screen for dehydrating water from the particles sorted and separated by the spiral weight selector, And a third dewatering screen provided in the micro-tanks.

In addition, the purification system for the contaminated soil further includes a balance tank, wherein the balance tank stores the purified water or newly injected water in the water treatment apparatus and supplies the purified water or newly injected water to the oil skimmer, A first balance tank for receiving particles smaller than a reference particle size discharged from the first IA outlet, and a second balance tank for storing purified water or freshly infused water in the water treatment apparatus and supplying the purified water to the micro- The second balance tank being provided with particles smaller than the reference particle size discharged from the second AE outlet of the second balance tank.

The water treatment apparatus includes a sludge concentration tank for transporting and storing the sludge agglomerated and concentrated in the first and second balance tanks, a polymer tank storing a polymer in a solid or liquid state, A sludge concentrating tank for mixing the sludge with the sludge, a mixing tank for mixing the sludge with the sludge, and mixing and supplying the sludge to the sludge concentration tank, And an air compressor for compressing the air and storing the compressed air in the air tank.

The first hydrocyclone is composed of a hollow first conical tapered portion and a first nozzle portion, and has a first input port which enters in the tangential direction of the cylindrical shape, an IA outlet connected to the inlet side of the first tapered portion, And a first B outlet connected to the first nozzle unit.

Further, the present invention is characterized by further comprising a constant temperature water bath provided outside the friction grinding unit.

The simultaneous desorption of oil and heavy metals may further comprise a high-temperature high-pressure steam reaction tank for leading to the preliminary crushing and the temperature increase of the contaminated soil supplied from the feeding device.

According to another aspect of the present invention, there is provided a system for purifying contaminated soil, comprising: a feeding device for quantitatively supplying contaminated soil; a high-temperature high-pressure A simultaneous desorption apparatus for oil and heavy metals using thermal deformation fracture so that the contaminated soil that has passed through the high temperature and high pressure steam reaction tank is broken with a fine slurry and the oil and the heavy metal are simultaneously desorbed from the contaminated soil; A vibration screen for screening the soil slurry introduced from the simultaneous desorption apparatus with a predetermined particle size and then generating a first treated soil and a first magnetic soil using a magnetic separator; An oil skimmer for removing the oil component from the oil slurry; A first height selecting device for selecting a first level of the soil to generate a second magnetic filler, a micro-tile tank for storing the first and second reference grit exceeding the first reference size, A second altitude sorter for generating second treated soot by performing second altitude sorting on the soil so that the second soil sorbent is larger than the second reference particle size in the soil and the soil introduced from the first altitude sorter, And a water treatment apparatus for transporting, storing, and treating the gravel having a particle size smaller than the second reference particle size separated by the second gravel screening apparatus.

According to another aspect of the present invention, there is provided a system for purifying contaminated soil, comprising: a feeding device for quantitatively supplying contaminated soil; and a controller for controlling the contamination of the contaminated soil supplied from the feeding device with a fine slurry, A vibration screen for sorting the soil slurry introduced from the oil and heavy metal simultaneous cleaning device by a predetermined particle size, and a vibrating screen for separating the oil slurry and the heavy metal, A magnetic type magnetic separator for separating and sorting particles having a predetermined particle size or more by a magnetic force and dividing the particles into a first treated soil and a first magnetic soil; an oil skimmer for removing oil components from the soil slurry introduced from the vibration screen; In the soil slurry introduced from the oil skimmer, separation according to the particle weight or specific gravity and magnetic force And an altitude sorting device for sorting the second mag- netic soil, the second treated soil and the heavy soil.

A method for purifying a complex contaminated soil according to an embodiment of the present invention includes: a feeding step of supplying a contaminated soil; and attrition and breaking of the contaminated soil supplied in the feeding step into a fine slurry, A simultaneous desorption of oil and heavy metals, which is performed by fusing crushing due to physical friction and a chemical treatment using a cleaning agent for removing oil or heavy metals, and a thermal treatment using high-temperature high-pressure steam and hot water to remove oil and heavy metals simultaneously; A screen step of screening the soil slurry introduced through the simultaneous desorption of oil and heavy metals with a predetermined particle size; and a step of sorting the soil particles having a size larger than a predetermined size filtered by the screen step into a first treated soil and a first magnetic soil by using a magnetic separator And a screening step of screening the soil slurry, And a second sludge removing device for removing the sludge from the soil slurry flowing through the oil removing step by using the first sludge separator, A second altitude sorting step of generating a second treated soil and a heavy soil by using a second altitude sorting device for the soil which is larger than the second reference particle size in the soil introduced through the first altitude sorting step; And a second sifting step for sifting the soil having a particle size smaller than the first reference particle size selected in the first sifting step and the soil having a particle smaller than the second reference particle size sorted and separated in the second sifting step, And a water treatment step.

Another aspect of the method of purifying a complex contaminated soil according to an embodiment of the present invention includes a feeding step for supplying a contaminated soil, a step for attrition and breaking the contaminated soil supplied in the feeding step into a fine slurry, Cleaning the oil and heavy metal by fusing crushing due to physical friction and chemical treatment using a cleaning agent for removing oil or heavy metals and thermal treatment using high temperature high pressure steam and hot water so that oil and heavy metals are simultaneously desorbed from contaminated soil; A screen step of screening the soil slurry flowing through the oil and heavy metal cleaning steps at a predetermined particle size using a vibrating screen, and a step of spraying the particles larger than a predetermined particle size filtered by the screen step through a magnetic type separator Selecting and separating the first processed soil and the first magnetic soil; Removing the oil component of the soil slurry flowing through the clean step; and separating the second slurry and the second slurry according to the particle weight, the specific gravity and the magnetic force in the soil slurry flowing through the oil removing step, And an altitude sorting step of sorting the soil and the heavy soil.

Accordingly, the simultaneous desorption of oil and heavy metals in a complex contaminated soil using thermal deformation fracturing according to an embodiment of the present invention, and a system and method for purifying a complex contaminated soil containing the same, , The thermal effect of the high-temperature high-pressure steam and the chemical desorption effect of the cleaning agent for removing oil or heavy metals are combined to effectively remove heavy metals as well as oil.

In particular, it is possible to inject high-temperature, high-pressure steam and hot water by a simple device, and it is an economical method because it does not require complicated devices even when the scale is increased in the field, and the temperature of the contaminated soil is increased by supplying steam As the fluidity of the oil component increases, the volatility increases as the vapor pressure of the oil increases, and the solubility of the pollutant dissolved in the water of the soil also increases.

In addition, since the water content in the soil is increased due to the supply of high-temperature high-pressure steam and hot water to the soil, the desorption of contaminants is accelerated due to an increase in the concentration gradient of the contaminant between the liquid phase and the solid phase. The supply of the soil is simultaneously brought about by the temperature rise and the water supply, so that the desorption and volatilization of the adsorbed organic contaminants can be accelerated.

Also, the simultaneous desorption of oil and heavy metals in a complex contaminated soil using thermal deformation fracturing according to an embodiment of the present invention, and a system and method for purifying a complex contaminated soil containing the same, are characterized in chemical treatment for treating heavy metal contaminated soil, There is no need to perform cleaning, and it has an effect of improving economy, environment friendliness, workability, and safety.

In addition, the simultaneous desorption apparatus for oil and heavy metals in a complex contaminated soil using thermal deformation fracturing according to an embodiment of the present invention, and the system and method for purifying complex contaminated soil containing the same, It can be easily applied to a purification process of a complex contaminated soil.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a purification system for a contaminated soil according to an embodiment of the present invention; FIG.
2 is a view showing a purification system for a complex contaminated soil according to an embodiment of the present invention.
3 is an enlarged view of a portion A shown in Fig.
4 is an enlarged view of a portion B shown in Fig.
5 is an enlarged view of a portion C shown in Fig.
FIG. 6 is a view showing the oil and heavy metal simultaneous desorption apparatus of the contaminated soil shown in FIG. 2. FIG.
FIG. 7 is a view for explaining the operation of the oil and heavy metal simultaneous desorption apparatus shown in FIG.
FIG. 8 is a flowchart for explaining the purification system for the contaminated soil shown in FIG. 1; FIG.
9 is a view showing a purification system for a contaminated soil according to another embodiment of the present invention.
10 is a graph showing experimental results according to experimental conditions and experimental methods shown in Tables 1 and 2.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a purification system for a contaminated soil according to an embodiment of the present invention. FIG. 2 is a view showing a purification system for a contaminated soil according to an embodiment of the present invention. FIG. 4 is an enlarged view of a portion B shown in FIG. 2, and FIG. 5 is an enlarged view of a portion C shown in FIG.

As shown in FIGS. 1 to 5, a complex polluted soil purification system 10 according to an embodiment of the present invention includes a feeding device 100 for supplying contaminated soil, (200) for simultaneously destroying oil and heavy metals in the contaminated soil by destroying the contaminated soil with a fine slurry, and an apparatus for simultaneously removing oil and heavy metals from the soil introduced from the oil and heavy metal simultaneous desorption apparatus A vibrating screen 300 for selecting the slurry to a predetermined particle size and then producing a first processed soil S1 and a first magnetic soil Ml using a magnetic force sorter 400; The oil skimmer 500 removes the oil component contained in the supernatant of the soil slurry. The soil slurry introduced from the oil skimmer 500 is first sorted to a higher level than the first reference level, ), ≪ / RTI > A fine soil tank 700 for storing a soil of a first reference particle size or more introduced from the first altitude sorting apparatus 600; A second altitude sorter 800 for generating a second treated soot S2 and a heavy soil H by selecting a second altitude for the second soil sorbent having a larger reference particle size than the first soil sorbent, And a water treatment apparatus 20 for transporting and storing the gravel having a particle size smaller than the first reference particle size and the gravel having a particle size smaller than the second reference particle size separated by the second guttering apparatus 800 .

The feeding device 100 is a device for feeding the soil mixed with the contaminants into the oil and heavy metal simultaneous desorption device 200. The feeding device 100 includes a hopper 110 into which the contaminated soil is fed, A belt feeder 120 disposed below the hopper 110 to feed the contaminated soil in a horizontal direction, a roll cutter 130 for cutting the contaminated soil supplied from the belt feeder 120, a roll cutter 130 And a belt conveyor 140 for conveying the contaminated soil supplied from the roll cutter 130 in a horizontal direction in a predetermined amount.

The feeding device 100 is connected to a simultaneous desorption device 200 for removing oil and heavy metals from the soil to increase the efficiency of the purification process, which will be described later.

The oil and heavy metal simultaneous desorption apparatus 200 is a system in which the contaminated soil supplied from the feeding apparatus 100 is mixed with a cleaning agent in the state of thermal energy input and is individually crushed into fine slurry by friction crushing so that the oil and heavy metals are simultaneously desorbed (200) in which a chemical treatment method and a thermal treatment method are fused.

The simultaneous desorption of oil and heavy metals (200) includes a chemical tank (210) for providing a cleaning agent for chemical treatment of soil contaminated with oil and heavy metals, and a chemical tank A friction between the complex soil particles and the physical treatment through friction using the washing agent provided in the chemical tank 210 and the steam and hot water provided in the heater 220, And a crushing unit (230).

The chemical tank 210 may inject detergent and / or detergent into the friction pulverizing unit 220 to increase the solubility of the contaminants and increase activity on the surface of the soil particles to induce desorption of the contaminants.

For example, the chemical tank 210 may include a first chemical tank (not shown) containing a surfactant for enhancing the activity of the soil particle interface, A second chemical tank (not shown) containing a chelating agent for preventing the recombination of soil particles and heavy metals by eluting heavy metal cations bound to the soil particles to form a complex, and an oxidizing agent for decomposing and decomposing soil particles bound or desorbed contaminants And a third chemical tank (not shown) accommodated therein.

The heater 220 provides high-temperature, high-pressure steam and hot water to the friction crushing unit 230 to raise the temperature of the contaminated soil accommodated in the friction crushing unit 230, thereby reducing the mobility of the low- The boiler 220 may include a conventional boiler 220.

The high-temperature high-pressure steam and hot water supplied from the cleaning tank provided in the chemical tank 210 and the heater 220 are supplied to the friction crushing unit 230 to efficiently remove contaminants from the soil.

The friction grinding unit 230 includes a main body 231 having an outer tube 231A formed with a steam inlet 231A through which the steam supplied from the heater 220 is introduced and a main body 231 formed inside the main body 231, A cleaner accommodating portion 232 in which the cleaner provided by the pump P is accommodated in the cleaner accommodating portion 210 and an impeller 233A disposed in the cleaner accommodating portion 232 of the main body 231 to frictionally clean the contaminated soil A driving motor 234 disposed above the main body 231 to provide a rotational force to the driving shaft 233 and a driving motor 234 disposed above the bottom 231 of the main body 231 so as to be separated from the main body 231. [ A hot water storage part 235 formed on the inner surface of the impeller 233 to receive the hot water provided from the heater 220 and a resistance plate 236 installed on the inner wall of the detergent receiving part adjacent to the impeller 233A for friction- .

The main body 231 forms an outer appearance of the friction grinding unit 230 and may be formed in various shapes and materials.

For example, the main body 231 may be formed in various shapes such as a cylinder, a rectangle, a square, and an octagonal shape. The main body 231 may be made of various materials such as steel, stainless steel, concrete, plastic, metal, Lt; / RTI >

The steam inlet 231A is formed on the upper side of the main body 231 so that the high temperature and high pressure steam supplied from the heater 220 can be introduced into the main body 231 so that the steam can be uniformly distributed to the contaminated soil inside the main body 231.

By heating the soil slurry in the friction crushing unit 230 through the supply of the high temperature and high pressure steam and increasing the moisture content, the solubility of the organic pollutants, the increase of the vapor pressure and the desorption are induced, Volatile organic contaminants and various heavy metals can be desorbed.

The cleaning agent receiving portion 232 is formed in the interior of the main body in which the cleaning agent provided in the chemical tank 210 is accommodated. In this cleaning agent receiving portion 232, the liquid to solid ratio including the contaminated soil, the cleaning agent, Can be introduced at a ratio of about 1: 1.

That is, in the conventional general cleaning process, the ratio of the contaminated soil to the liquid phase was about 1: 4. In one embodiment of the present invention, the ratio of the contaminated soil and the liquid phase including the cleaning agent and steam is 1: So that the effect of physical fracturing can be maximized.

The drive motor 234 is capable of providing rotational force to the drive shaft 233 and controlling the rotational speed.

The drive shaft 233 is made of alumina and has a plurality of impellers 233A radially disposed at the lower end thereof. The drive shaft 233 is connected to the drive motor 234 and rotated by the rotation of the drive motor 234. The impeller 233A serves to mix and collide the soil slurry with each other to friction-grind and disperse the soil slurry.

The hot water storage unit 235 is formed at the bottom of the main body 231 so that the hot water provided by the heater 220 can be introduced. By heating the soil slurry in the friction grinding unit 230 through such hot water, fluidity of the contaminant is increased to increase the desorption effect, so that volatile organic contaminants such as oil in the soil and various heavy metals can be effectively desorbed.

The impeller 233A attrition and breaks due to the friction between the particles in the soil slurry in a state where steam and hot water are supplied at high temperature and high pressure to efficiently separate the oil and various heavy metals attached to the contaminated soil In addition, the soil slurry is friction-ground so that the oil and various heavy metals distributed in the contaminated soil particles can be efficiently separated. Further, the impeller 233A induces a temperature rise due to frictional heat caused by collision with the soil particles, so that the mobility of the low-volatile oil pollutant is increased.

That is, the impeller 233A generates frictional heat while simultaneously performing the first step A1 of attrition of the contaminated soil particles by the high-speed rotation and the second step B1 of breaking the soil soil, So that the oil and various heavy metals distributed on the surface and inside of the particles can be efficiently separated. (See Fig. 7)

The simultaneous desorption of oil and heavy metals 200 removes the thermal effect of the high temperature high pressure steam and hot water in the heater 220 and the thermal effect of the chemical tank 210 The present invention can be effectively applied to a soil contaminated with low volatile oil and heavy metal complex contaminated with an optical cleaning apparatus 200 that combines the chemical desorption effect of a cleaning agent for removing oil or heavy metals in the soil.

The operation of the oil and heavy metal simultaneous desorption apparatus 200 will be described in detail. The turbulent flow between the soil slurry and the high-temperature steam causes mixing of the medium of solid, liquid, and gaseous phase. The soil particles are separated from the soil particles by the physical factors such as impact force and friction force applied to the soil particles including the soil particles, and at the same time, the lump structure between the particles is broken, thereby maximizing the efficiency of chemical washing and thermal cleaning in the future.

Also, the high speed rotation of the impeller 233A is naturally generated by the steam. Here, the forward direction of the slurry and the rotating direction of the impeller 233A are perpendicular to each other, so that a strong shearing force is applied to the soil particles. In this process, the effect of shear force can be expected to effect the separation of contaminants and soil particles, and the destruction of the lump structure.

In addition, the mobility of the low volatile oil pollutants is increased by inducing the friction between the soil particles and the temperature rise due to the friction heat between the soil particles and the impeller resistance, Can be increased.

The friction grinding unit 230 according to an embodiment of the present invention includes a first step A1 of attrition of contaminated soil particles by high speed rotation and a second step B1 of breaking For example, such a friction grinding unit 230 may include an attrition scrubber. The friction grinding unit 230 may include an attrition scrubber.

In addition, although not shown in the drawing, a constant-temperature water bath is provided outside the friction grinding unit 230 of the oil and heavy metal simultaneous desorption apparatus 200 to induce the fluidity of the oil contaminant to rise, 230 can maximize the removal efficiency of oil and heavy metals due to the physical and chemical and thermal reaction mechanisms occurring.

The soil slurry discharged from the oil and heavy metal simultaneous desorption apparatus 200 flows into the vibration screen 300 to select particles having a predetermined particle diameter or more and pass only fine particles having a particle diameter smaller than a predetermined particle diameter to carry out a subsequent process.

The vibration screen 300 has a structure in which only the fine particles in the soil slurry flowing from the oil and heavy metal simultaneous desorption apparatus 200 are passed through the first processed soil S1 through the magnetic separator 400, And the first magnetic layer M1.

However, the vibration screen 300 may be a wet vibration screen 300 using water spray. In order to efficiently perform particle sorting, the polluted soil having a first particle size (for example, 8 mm) And a second screening network 320 having a second size (for example, 2 mm) that is relatively smaller than the first size and installed at a lower portion of the first screening network 310 Of course.

Particles of a predetermined size or larger that have not passed through the vibration screen 300 flow into the magnetic separator 400 after rinsing the clean water. The magnetic separator 400 is a wet magnetic force sorting method using permanent magnets, And a magnet 420 as shown in Fig.

The magnetic separator 400 may be a drum type using a permanent magnet having a high magnetic force of 5,000 gauss or more.

This process effectively removes the paramagnetic waste in soil, which is the cause of heavy metal contamination including ferromagnetic heavy metals including iron, nickel and so on and has the highest contamination distribution, as the first magnetic earth (M1). As a matter of course, the efficiency of the process can be increased by increasing the number of the magnetic separators 400 in series in a double or triple manner.

The fine particles passing through the vibration screen 300 are introduced into the oil skimmer 500.

The oil skimmer 500 removes oil components contained in the supernatant of the soil slurry introduced from the vibration screen 300. The oil skimmer 500 includes a body 510 in which the soil slurry is received, A blade 530 provided at a predetermined interval on the outer circumferential surface of the rotary belt 520 and a blade 530 for separating the oil attached to the blade 530 from the rotary belt 520. [ And an oil tank 550 for storing oil recovered by a scraper is provided on the outside of the main body 510.

In the oil skimmer main body 510, the fine contaminants are concentrated by gravity settling, and the gravity settled fine contaminants are introduced into the first altitude sorting apparatus 600 through the pump P.

The first altitude sorting apparatus 600 is configured to sort the soil material having the first reference particle size larger than the first reference particle size from the fine contaminants introduced by the pump P in the oil skimmer 500 into the second magnetic soil M2 .

The first altitude sorting apparatus 600 performs wet-type particle separation to discharge particles smaller than the first reference particle size to the first A discharge port 611A and particles larger than the first reference particle size to the first B discharge port 612A A magnetic filter 620 for selecting the magnetic force of heavy metal particles larger than the first reference particle size discharged from the first B discharge port 612A of the first hydrocyclone 610, A first dehydrating screen 630 for dehydrating water from particles larger than a first reference particle size selected by the filter 620 to generate a second magnetic soil M2 and supplying dehydrated water to the oil skimmer 500, .

The first hydrocyclone 610 performs wet-type particle separation on the basis of a first reference particle size, which first hollow portion 611 has a hollow conical first tapered portion 611 and a first nozzle portion 612 A first input port 611B that enters from the tangential direction of the cylindrical shape, an IA outlet port 611A that is connected to a wide inlet side of the first tapered portion 611, and a second input port 611B that is connected to the first nozzle portion 612 And a first B outlet 612A connected thereto.

That is, water and contaminated soil are introduced into the first inlet 611B, and large swirls and small swirls are generated in the first tapered portion 611 due to the swirling phenomenon and the centrifugal force, and a vertical flow passing through them in the axial direction is generated. At this time, the difference in centrifugal force occurs due to the weight difference of the particles, thereby separating the particles having a particle size larger than the first reference particle size and the particles having a particle size smaller than the first reference particle size.

In other words, small particles having a particle size smaller than the first reference particle size and water are discharged through the first IA outlet 611A, and large particles having a particle size larger than the first reference particle size are discharged through the first B outlet 612A At this time, by adjusting the length of the first tapered portion 611 and the ratio of the entrance area at both ends, it is possible to separate the gravel with respect to the desired particle size.

Then, the micro-soil and water having the solidified liquid separated and smaller than the first reference particle size are first concentrated by gravity deposition in the first balance tank 910, and these micro-soil is high in adsorption amount of heavy metal.

The magnetic filter 620 selectively heats heavy metals in particles larger than the first reference particle size discharged from the first B discharge port 612A of the first hydrocyclone 610 and discharges the selected heavy metals to the first dehydration screen 630 To produce the second magnetic layer M2. At this time, the water dehydrated by the first dehydrating screen 630 may be supplied to the oil skimmer 500.

Particles having a particle size larger than the first reference particle size that has passed through the magnetic filter 620 are introduced into the fine particle tank 700. The first and second fine particle separation devices 600 and 600 The altitude sorting apparatus 800 can be distinguished.

The micro-soil tank 700 stores fine gravels of a first reference particle size or more that have flowed in from the first gravel screening apparatus 600. The fine gravels of the first reference particle size or more stored in the micro- ≪ / RTI >

The second altitude sorting apparatus 800 performs the second altitude sorting of the gravels larger than the second reference grit in the gravels introduced by the pump P in the fine gravel troughs 700, (H). Here, the heavy soil H is defined as being distinguished from the first and second magnetic earths M 1 and M 2 which are separated and sorted by specific gravity selection and sorted and sorted by magnetic force separation.

The second altitude sorting apparatus 800 performs wet-type particle separation to discharge particles smaller than the second reference particle size to the second AE outlet 811A and particles larger than the second reference particle size to the second B outlet 812A A spiral gravity sorter 820 for sorting gravity of heavy metal particles larger than the second reference gravity discharged from the second B outlet 812A of the second hydrocyclone 810, A second dewatering screen 830 for dehydrating water from the grains sorted by gravity by the spiral gravity sorter 820 to generate a second treated soil S2 and supplying dehydrated water to the micro-soil tank 700, And a third dewatering screen 840 for dehydrating water from the particles sorted and sorted by the spiral weight selector 820 to produce a heavy soil H and supplying dehydrated water to the fine soil tank 700 .

The second hydrocyclone 810 has the same configuration as the first hydrocyclone 610 and performs wet separation of the granules based on the second reference granularity which is largely hollow conical A second input port 811B which is composed of a second tapered portion 811 and a second nozzle portion 812 of the second tapered portion 811 and which enters in the tangential direction of the cylindrical shape, 2A discharge port 811A and a second B discharge port 812A connected to the second nozzle portion 812. [

Particles larger than the second reference particle size discharged to the second B discharge port 812A of the second hydrocyclone 810 are discharged to the second treated soil S2 and the heavy soil H by the specific gravity classification using the spiral gravity sorter 820. [ . ≪ / RTI >

When the spiral gravity sorter 820 sends a certain amount of gravel to the upper part, the force acting on the various grains when the gravity descends under the influence of the gravitational force acts on gravity, buoyancy, water pressure, centrifugal force, frictional force, Large particles are collected on the lower inner side of the groove, and the particles with a smaller specific gravity are collected along with the water to the higher outside of the spiral and separated.

Accordingly, particles having a large specific gravity gathered inside the spiral gravity sorter 820 are separated into a heavy soil H by a dehydration process via a second dehydration screen 830, and then dehydrated by a second dehydration screen 830 Water is supplied to the micro-soil tank 700.

Particles of low specific gravity gathered outside the spiral gravity sorter 820 are separated by the third dewatering screen 840 into a second treated soil S2 after the dewatering treatment and the third treated dewatering screen 840 The dehydrated water is supplied to the micro-soil tank 700.

On the other hand, the complex contaminated soil purification system 10 further includes a balance tank 900, which stores the purified water or newly injected water in the water treatment apparatus 20, A first balance tank 910 provided to the skimmer 500 and being supplied with particles smaller than the reference particle size discharged from the first IA outlet 611A of the first hydrocyclone 610, ) And the purified water or newly injected water is supplied to the micro-soil tank 700 and is supplied with particles smaller than the reference particle size discharged from the second AH outlet 811A of the second hydrocyclone 810 And a second balance tank 920 to which the second balance tank 920 is connected.

The water treatment apparatus 20 includes a soil separator having a particle size smaller than a first reference particle size separated from the first balance tank 910 by the first altitude sorting apparatus 600 and a second soil tank (920), which is smaller than the second reference particle size.

The water treatment apparatus 20 includes a sludge concentration tank 21 for transporting and storing sludge agglomerated and concentrated in the first and second balance tanks 910 and 920 and a polymer tank 22 A mixing tank 23 for mixing and stirring the polymer supplied from the polymer tank 22 with water and supplying the polymer to the sludge thickening tank 21; and a mixing tank 23 for mixing the polymer supplied from the polymer tank 22 with the sludge thickening tank 21 And a filter press 24 for dewatering the treated sludge into a cake (CAKE).

The sludge concentration tank 21 serves to concentrate and store the sludge agglomerated by gravity sedimentation in the first balance tank 910 and the second balance tank 920.

The polymer tank 22 stores a polymer in a solid or liquid state. The polymer tank 22 is provided with a pump P for supplying the stored polymer to the mixing tank 23.

The mixing tank 23 serves to mix the polymer supplied from the polymer tank 22 with the water supplied by the pump P of the water supplier 30 and to supply the polymer to the sludge concentration tank 21 by the pump P do.

The filter press 24 is for final dewatering of the mixed and stirred sludge in the sludge concentration tank 21 and the sludge of the sludge concentration tank 21 is conveyed to the filter press 24 by the pump P. [

The filter press 24 may be a pneumatic filter press. To this end, the water treatment apparatus 20 includes an air tank 25 for compressing the sludge filled in the filter press 24 by air pressure, And an air compressor (26) for storing the air in the air tank (25).

The polymer which has been stirred with water in the mixing tank 23 is supplied to the sludge concentration tank 21 but the polymer stirred with the water in the mixing tank 23 can be supplied to the inlet side of the filter press 24. [ Of course it is.

In addition, the cleaning system 10 for the contaminated soil according to an embodiment of the present invention further includes a water supplier 30, which is connected to the vibration screen 300 ), The spiral weight selector 820 and the heater 220. [0050] The water dispenser 30 may include a first water dispenser 31 for providing fresh water and a second water dispenser 32 for providing water purified by the filter press 24, Of course.

Next, referring to FIG. 8, a method for purifying a contaminated soil according to an embodiment of the present invention will be described.

As shown in FIG. 8, the method for purifying a complex contaminated soil according to an embodiment of the present invention includes: a feeding step (S100) for feeding a contaminated soil; and a step of feeding the contaminated soil supplied in the feeding step to a fine slurry Combination of chemical treatment using cleaning agent for removing oil or heavy metal and thermal treatment method using high temperature high pressure steam and hot water to friction rupture due to physical friction so that oil and heavy metal are desorbed simultaneously in attrition and breaking by attrition and breaking (S300) of selecting a soil slurry having a predetermined particle size, which has been introduced through the simultaneous desorption of oil and heavy metals (S300); a step (S300) of filtering the heavy metals and heavy metals Separating the particles into a first processed soil and a first magnetic soil using a magnetic separator (S400); and a step (S500) for removing the oil component contained in the soil slurry introduced through the oil removing step (S500) by using an oil skimmer; and a step for removing soil from the soil slurry flowing through the oil removing step, (S600) of forming a second geomagnetic soil by using the second height selecting device (S600); and a second height selecting step (S600) of forming a second geomagnetic soil using the second height selecting device (S700) for producing two treated soils and heavy soils; and a second sifting step (S700) for producing soil and heavy soils having a smaller particle size than the first reference particle size selected in the first sifting step, And a water treatment step (S800) for transporting and storing the gravel having particles smaller than the second reference particle size.

Another embodiment of the present invention will be described with reference to Fig. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. 9 is a view showing a purification system for a contaminated soil according to another embodiment of the present invention.

As shown in FIG. 9, the cleaning system 10 'for a contaminated soil according to another embodiment of the present invention includes a feeding device 100 for supplying contaminated soil, And a high-temperature high-pressure steam reaction tank 240 for inducing the preliminary crushing and temperature elevation of the soil, so that the contaminated soil that has passed through the high-temperature high-pressure steam reaction tank 240 is broken down with a fine slurry so that the oil and heavy metals are simultaneously desorbed from the contaminated soil The soil slurry introduced from the oil and heavy metal simultaneous desorption apparatus 200 'is sorted to a predetermined particle diameter, and then the first and second slurry are separated by using the magnetic separator 400, A vibration screen 300 for generating the treated soil S1 and the first magnetic body M1; an oil skimmer 500 for removing oil components contained in the upper water of the soil slurry introduced from the vibration screen 300; And oil in the oil skimmer 500 A first altitude sorting apparatus 600 'for sorting the soil slurry having a first reference particle size by a first height to produce a second magnetic soil M2; and a first altitude sorting apparatus 600' And a second soil separator for separating the soil from the soil introduced from the first elevation separator 600 'and the soil introduced from the fine soil tank, A second altitude sorting apparatus 800 'for sorting the first to-be-sorted first to-be-sorted first to-be-sorted first to-be-sorted second to-be- And a water treatment apparatus 20 'for storing and transporting the soil.

The simultaneous desorption of oil and heavy metals (200 ') comprises a chemical tank (210) for providing a cleaning agent for the chemical treatment of soil contaminated with oil and heavy metals, and a chemical tank A friction grinder unit 230 for frictionally cleaning the mixed contaminated soil for physical treatment using the washing agent provided in the chemical tank 210 and the steam and hot water provided in the heater 220; , And a high-temperature high-pressure steam reaction tank (240) for inducing the preliminary crushing and temperature raising of the contaminated soil supplied from the feeding device (100) using the high-temperature and high-pressure steam supplied from the steam generator (241).

The high-pressure and high-pressure steam reaction tank 240 induces the preliminary crushing and the temperature increase of the contaminated soil supplied from the feeding device 100 to increase the fluidity of the oil. As the fluidity of the oil is increased, the pollutants can be removed more efficiently by the physical, chemical and thermal mechanisms in the frictional crushing unit.

The contaminated soil that has passed through the simultaneous desorption apparatus 200 'for oil and heavy metals is divided into a first treated soil and a first magnetic soil by sequentially passing through a vibration discriminator 300 and a magnetic separator 400, The particles not larger than the predetermined size are supplied to the first altimeter 600 'via the oil skimmer 500.

The first height selecting device 600 'performs wet-type particle separation to discharge particles smaller than the first reference size into the second hydrocyclone 810' of the second height separating device 800 ' A first hydrocyclone 610 'for discharging particles larger than the particle size to the magnetic filter 620; a magnetic filter 610' for filtering magnetic particles of particles larger than the first reference particle size discharged from the first hydrocyclone 610 ' (620 ').

That is, the first height selection device 600 'generates the second magnetic layer M2 by sorting the heavy metal among the particles larger than the first reference size through the first hydrocyclone 610' The particles smaller than the particle size are provided to the second hydrocyclone 820 'of the second altitude sorter 800'.

The micro-soil tank 700 'stores fine gravels not containing a heavy metal among the particles larger than the first reference particle size that have passed through the magnetic filter 620' of the first altitude classifying apparatus 600 ' The fine gravel stored in the micro-soil tank 700 'is provided to the spiral gravity sorter 820' of the second altitude sorter 800 '.

The second altitude sorting apparatus 800 'is configured to perform the second altitude sorting apparatus 800' in which the second hydrocyclone 810 ' To produce a second treated soot S2, and the second treated soot having a smaller second reference size is supplied to the balance tank 900 '.

The second altitude sorting apparatus 800 'performs wet-type particle size separation so that particles smaller than the second reference particle size are discharged to the balance tank 900' and particles larger than the second reference particle size are supplied to the spiral gravity sorter 820 ' A spiral gravity sorter 820 'for sorting grains larger than a second reference grain size discharged from the second hydrocyclone 810', a spiral gravity sorter 820 ' And a dewatering screen 830 'for dehydrating water from the particles sorted by the dewatering tank 820' to produce a second treated soil S2 and providing dehydrated water to the soil tank 700 '.

That is, the second altitude sorting apparatus 800 'may be configured such that particles larger than the second reference grain size passing through the second hydrocyclone 620' are sorted by the specific gravity of the spiral gravity sorter 820 ' 2 treated soil S2 and the particles having a small specific gravity are supplied to the sludge thickening tank 21 of the water treatment apparatus 20 '.

The water treatment apparatus 20'is used for transferring and processing the fine grains stored in the balance tank 900 'and particles having a small specific gravity selected by the spiral gravity sorter 820' of the second altitude separation device 800 ' A plurality of sludge thickening tanks 21 'for storing sludge transferred from the second talliser and balance tanks 800', 900 ', and a sludge thickening tank 21' And a filter press 24 'for squeezing and dewatering the sludge transferred by the operation of the pump P to a cake (CAKE).

That is, the sludge contained in the sludge concentration tank 21 'accommodating the sludge generated during the purification process of the contaminated soil is fed to the filter press 24' by the operation of the pump P, and then is drawn into the filter press 24 ' The sludge is squeezed and dewatered, and the dewatered water is discharged to the water storage unit (30).

Next, the operation of the oil and heavy metal cleaning apparatus of the contaminated soil according to one embodiment of the present invention will be described with reference to Tables 1 and 2 and FIG.

Experimental conditions
Cleaning agent selection

size
Temperature
SDS + EDTA

2 mm or less
70 to 90 degrees

Experimental Method
Removal mechanism Experimental Method
Remarks
physical Chemical Thermal One X X X No friction rupture, Water use,
No HOT WATER 2 O X X Friction rupture, water use,
No heat Evaluation of particle size change 3 X O X No friction rupture, Water use,
No heat 4 X X O No friction rubbing, Use of cleaning agent,
Can open 5 O O X Friction rupture, water use,
No heat Evaluation of particle size change 6 O X O Friction rupture, use of detergent,
Can open Evaluation of particle size change 7 X O O No friction rubbing, Use of cleaning agent,
Can open 8 O O O Friction rupture, use of detergent,
Can open Evaluation of particle size change

As shown in FIG. 9, the initial contaminated soil concentration at initial concentrations Pb 150.21 [mg / kg], Zn 51.17 [mg / kg] and TPH 421.12 [mg / kg] was Pb 167.11 [mg / kg ], Zn 49.52 [mg / kg] and TPH 401.05 [mg / kg], and Pb 92.4 mg / kg and 37.72 mg / kg TPH in Experiment 2 using water and friction disruption The results of experiment 3 show that the experimental results of Pb 135.57 [mg / kg], Zn 50.25 [mg / kg] and TPH 110.5 [mg / kg] The experimental results showed that Pb 25.35 [mg / kg], Zn 12.28 [mg / kg] and TPH 11.2 [mg / kg] [mg / kg].

As shown in [Table 1] and [Table 2] and Fig. 9, based on the friction rupture caused by the physical friction of the friction grinding unit, the thermal effect of the high-temperature high-pressure steam and the chemical detachment of the cleaning agent for removing oil or heavy metals It can be seen that when the effects are applied in combination, excellent removal efficiency of Pb, Zn and TPH contaminants is obtained.

As described above, the cleaning system for the contaminated soil according to an embodiment of the present invention is based on friction rupture according to physical friction of the friction grinding unit, and it is possible to prevent the thermal effect of the high- It is understood that the basic technical idea is to make the chemical desorption effect work in a complex manner so that not only the oil but also the heavy metal can be efficiently removed. Therefore, many modifications may be made by those skilled in the art without departing from the scope and spirit of the present invention.

10,10 '... Purification system of complex contaminated soil 20,20' ... Water treatment system
30 ... water dispenser 100 ... feeding device
110 ... hopper 120 ... belt feeder
130 ... roll cutter 140 ... belt conveyor
200 ... Simultaneous desorption of oil and heavy metals 210 ... Chemical tank
220 ... heater 230 ... friction grinding unit
231 ... main body 232 ... cleaning agent accommodating portion
233 ... drive shaft 233A ... impeller
234 ... driving motor 235 ... hot water storage unit
300 ... Vibrating Screen 400 ... Magnetic Separator
410 ... drum 420 ... magnet
500 ... oil skimmer 510 ... skimmer body
520 ... rotating belt 530 ... blade
540 ... scraper 550 ... oil tank
600 ... First altitude sorter 610 ... First hydrocyclone
620 ... Magnetic filter 630 ... First dehydration screen
700 ... Micro soil tank 800 ... Second altitude sorter
810 ... second hydrocyclone 820 ... spiral gravity sorter
830 ... second dehydration screen 840 ... third dehydration screen
900 ... Balance tank 910 ... First balance tank
920 ... second balance tank

Claims (19)

A chemical tank for providing a cleaning agent for chemical treatment of soil contaminated with oil and heavy metals,
A heater for simultaneously providing steam and hot water for the thermal treatment of the contaminated soil,
And a friction grinding unit based on a thermal treatment and a chemical treatment using the washing agent provided in the chemical tank and the steam and hot water provided in the chemical tank to perform the physical treatment through collision between the composite contaminated soil particles and induction of friction In addition,
The friction grinding unit includes:
A main body having an upper side formed with a steam inlet through which the high temperature and high pressure steam supplied from the heater flows,
A cleaning agent accommodating portion formed inside the body and containing a cleaning agent provided in the chemical tank, wherein the liquid-to-solid ratio of the contaminated soil and the cleaning agent is 1: 1;
A driving shaft having an impeller disposed longitudinally in the cleaning agent receiving portion of the main body to perform friction cleaning of the contaminated soil;
A drive motor disposed above the main body to provide rotational force to the drive shaft;
A hot water storage portion formed at the bottom of the main body for receiving the hot water provided by the heater to heat the soil slurry in the main body to increase the fluidity of the pollutant;
And a resistance plate installed on each side of the inner wall of the detergent receiving portion adjacent to the impeller to perform friction cleaning of the contaminated soil,
Wherein the high speed rotation of the impeller is indicated by the high temperature and high pressure steam and the traveling direction of the soil slurry and the rotating direction of the impeller are perpendicular to each other to apply shear force to the soil particles. Simultaneous desorption of oil and heavy metals in contaminated soil. delete The method according to claim 1,
The impeller
The attrition process and the breaking process are simultaneously performed on the contaminated soil particles by high speed rotation and the temperature rise is induced by the friction heat caused by the collision with the contaminated soil particles to increase the fluidity of the oil pollutants Characterized in that it comprises a thermal deformation fracture. The method according to claim 1,
The friction grinding unit includes:
Characterized in that it comprises an attrition scrubber. The apparatus for simultaneous desorption of oil and heavy metals in a composite contaminated soil using thermal deformation fracturing. The method according to claim 1,
In the chemical tank,
A first chemical tank containing a surfactant for increasing the activity of the soil particle interface,
A second chemical tank containing a chelating agent for preventing the soil particles and heavy metals from recombining by eluting the heavy metal cations bound to the soil particles to form a complex,
And a third chemical tank containing an oxidizing agent for decomposing and decomposing the soil particles bound or desorbed contaminants. The apparatus for simultaneous desorption of oil and heavy metals in a complex contaminated soil using thermal deformation fracturing. The method according to claim 1,
Wherein the friction grinding unit further comprises a constant temperature water bath provided outside the friction grinding unit. A feeding device for quantitatively supplying contaminated soil,
A simultaneous desorption of oil and heavy metals using heat distortion fracture so that the contaminated soil supplied from the feeding device is worn and destroyed with a fine slurry to simultaneously remove oil and heavy metals from the contaminated soil;
A vibration screen for screening the soil slurry introduced from the oil and heavy metal simultaneous desorption apparatus to a predetermined particle size and then generating a first treated soil and a first magnetic soil using a magnetic separator;
An oil skimmer for removing oil components contained in the supernatant of the soil slurry introduced from the vibration screen,
A first elevation sorter for sorting the soil slurry larger than the first reference particle size by the first elevation in the soil slurry introduced from the oil skimmer,
A micro-soil tank for storing the soil above the first reference particle size introduced from the first altimeter,
A second altitude sorting apparatus for sorting the second soil to a second soil level higher than the second reference level to produce a second treated soil and a heavy soil,
A water treatment apparatus for transporting, storing, and treating the gravel having a particle size smaller than the first reference particle size separated by the first gravel screening apparatus and the gravel having a particle size smaller than the second reference particle size separated from the second gravel screening apparatus
Wherein the system comprises: 8. The method of claim 7,
The simultaneous desorption of oil and heavy metals,
A chemical tank for providing a cleaning agent for chemical treatment of soil contaminated with oil and heavy metals,
A heater for simultaneously providing steam and hot water for the thermal treatment of the contaminated soil,
A friction grinder for frictionally cleaning the mixed contaminated soil for physical treatment using the detergent provided in the chemical tank and the steam and hot water provided in the heater;
Wherein the system comprises: 8. The method of claim 7,
The first elevation sorter comprises:
A first hydrocyclone for performing particle size separation in a wet manner to discharge particles smaller than the first reference particle size to the first A discharge port and discharge particles larger than the first reference particle size to the first B discharge port;
A magnetic filter for magnetically separating the fine heavy metal particles from the first reference particle size discharged from the first B discharge port of the first hydrocyclone;
A first dehydrating screen for dehydrating water from particles larger than a first reference particle size selected by the magnetic filter to produce a second magnetic soil and providing dehydrated water to the oil skimmer;
Wherein the system comprises: 10. The method of claim 9,
The second altitude sorting apparatus comprises:
A second hydrocyclone for performing particle size separation in a wet manner to discharge particles smaller than the second reference particle size to the second A discharge port and discharge particles larger than the second reference particle size to the second B discharge port;
A spiral weight separator for sorting out heavy metals and fine particles from particles larger than a second reference particle size discharged from a second B outlet of the second hydrocyclone,
A second dehydrating screen for dehydrating water from the particles separated and sorted by the spiral weight selector to produce a second treated soil and providing dehydrated water to the micro-soil tank;
A third dehydrating screen for dehydrating water from the particles separated and sorted by the spiral weight selector to produce a heavy soil and providing dehydrated water to the micro-soil tank;
Wherein the system comprises: 11. The method of claim 10,
The purification system for the contaminated soil includes:
Further comprising a balance tank,
In the balance tank,
A first balance tank for storing purified water or freshly infused water in the water treatment apparatus and supplying the purified water or newly injected water to the oil skimmer and receiving particles smaller than a reference particle size discharged from an IA outlet of the first hydrocyclone,
A second balance tank for storing purified water or freshly infused water in the water treatment apparatus and supplying the water to the micro-soil tank and receiving particles smaller than a reference particle size discharged from the second 2A outlet of the second hydro-cyclone;
Wherein the system comprises: 12. The method of claim 11,
The water treatment apparatus includes:
A sludge concentrating tank for transporting and storing sludge agglomerated and concentrated in the first and second balance tanks,
A polymer tank in which a solid or liquid polymer is stored;
A mixing tank in which a polymer supplied from the polymer tank is mixed with water to provide the polymer to the sludge thickener;
A filter press for dewatering the sludge treated in the sludge concentration tank by the mixing tank to make a cake,
An air tank for squeezing the sludge filled in the filter press by air pressure;
An air compressor for compressing air and storing it in the air tank;
Wherein the system comprises: 10. The method of claim 9,
Wherein the first hydrocyclone comprises a first conical tapered portion and a first nozzle portion, the first hydrocyclone having a first inlet for entering the cylindrical tangential direction, an IA outlet connected to the inlet side of the first tapered portion, And a first B outlet connected to the first nozzle unit. 9. The method of claim 8,
Further comprising a constant temperature water bath installed outside the friction grinding unit. 8. The method of claim 7,
The simultaneous desorption of oil and heavy metals,
Further comprising a high-temperature high-pressure steam reaction tank for leading to a preliminary crushing and temperature elevation of the contaminated soil supplied from the feeding device. A feeding device for quantitatively supplying contaminated soil,
And a high-temperature high-pressure steam reaction tank for leading to a preliminary crushing and temperature rise of the contaminated soil supplied from the feeding device, wherein the contaminated soil passing through the high-temperature high-pressure steam reaction tank is broken into a fine slurry, A simultaneous desorption of oil and heavy metals using thermal deformation fracturing so as to be separated,
A vibration screen for screening the soil slurry introduced from the oil and heavy metal simultaneous desorption apparatus to a predetermined particle size and then generating a first treated soil and a first magnetic soil using a magnetic separator;
An oil skimmer for removing oil components contained in the supernatant of the soil slurry introduced from the vibration screen,
A first elevation sorter for sorting the soil slurry larger than the first reference particle size by the first elevation in the soil slurry introduced from the oil skimmer,
A micro-soil tank for storing the soil above the first reference particle size introduced from the first altimeter,
A second altitude sorter for generating a second treated soil by performing a second height sorting of the gravels that are larger than the second reference gravel particle in the gravels introduced from the first gravel screening apparatus and the gravels introduced from the micro-
And a water treatment apparatus for transporting, storing, and treating the gravel having a particle size smaller than a second reference particle size separated by the second gravel screening apparatus. A feeding device for quantitatively supplying contaminated soil,
A device for simultaneous cleaning of oil and heavy metals using thermal deformation fracture so as to simultaneously clean oil and heavy metals in the contaminated soil by abrading and destroying the contaminated soil supplied from the feeding device with a fine slurry,
A vibration screen for sorting the soil slurry introduced from the oil and heavy metal simultaneous cleaning apparatus with a predetermined particle size;
A drum type magnetic separator for sorting magnetic particles separated by the vibrating screen and having a particle size equal to or greater than a predetermined particle size into a first processed soil and a first magnetic soil,
An oil skimmer for removing oil components of the soil slurry introduced from the vibration screen,
An altitude sorting device for sorting and sorting the second magnetic soil, the second treated soil and the heavy soil by separating and sorting the soil slurry introduced from the oil skimmer according to particle weight, specific gravity and magnetic force;
Wherein the system comprises: A feeding step for feeding the contaminated soil;
A chemical treatment method using a cleaning agent for oil or heavy metal removal and friction rupture due to physical friction so that oil and heavy metal are simultaneously desorbed from contaminated soil by attrition and breaking with a fine slurry supplied in the feeding step A simultaneous desorption of oil and heavy metals by fusing a thermal treatment method using high temperature and high pressure steam and hot water,
A screen step of sorting the soil slurry flowing through the oil and heavy metal simultaneous desorption steps with a predetermined particle size;
Separating the soil particles separated in the screening step by a predetermined size into a first treated soil and a first magnetic soil using a magnetic separator;
An oil removing step of removing oil components contained in the soil slurry flowing through the screen step using an oil skimmer;
A first altitude sorting step of creating a second aggregate of soil with a first reference grain size larger than the first reference grain size in the soil slurry flowing through the oil removing step,
A second altitude sorting step of generating a second treated soot and a heavy soil by using a second altitude sorting apparatus for the gravels larger than the second reference size in the gravel introduced through the first altitude selecting step;
A water treatment step for transporting and storing the gravel having a particle size smaller than the first reference particle size selected in the first height selection step and the gravel having a smaller particle size than the second reference particle size selected in the second gravel screening step ;
Wherein the method comprises the steps of: A feeding step for feeding the contaminated soil;
A chemical treatment method using a cleaning agent for oil or heavy metal removal and friction rupture due to physical friction so that oil and heavy metal are simultaneously desorbed from contaminated soil by attrition and breaking with a fine slurry supplied in the feeding step An oil and heavy metal washing step of fusing a thermal treatment method using high temperature and high pressure steam and hot water,
A screen step of sorting the soil slurry flowing through the oil and heavy metal cleaning steps at a constant particle size using a vibrating screen,
Sorting the magnetic particles separated by the screening step into particles of a predetermined particle size or more through a magnetic type magnetic separator of a drum type and sorting them into a first treated soil and a first magnetic soil;
An oil removing step of removing the oil component of the soil slurry flowing through the screen step;
Separating the second soil, the second treated soil, and the heavier soil according to the weight, specific gravity, and magnetic force of the soil slurry flowing through the oil removing step;
Wherein the method comprises the steps of:

Images