KR101578058B1 - Contaminated soil remediation system using subcritical water - Google Patents

Abstract

The present invention relates to a contaminated soil purification apparatus using subcritical water. According to the present invention, the contaminated soil purification apparatus comprises: a water tank (10) where water for producing subcritical water is stored; a pump (20) pressurizing the water transported from the water tank (10); a bypass valve (30) transporting the water transported from the pump (20) to the water tank (10) and a storage tank (40); a storage tank (40) storing the water transported from the bypass valve (30); a pressure regulator (50) applying or reducing pressure to allow the water transported from the storage tank (40) to be in a condition with pressure reaching a subcritical state; a heat exchanger (60) including a main body (61) where the water transported from the pressure regulator (50) passes through, and a heat exchanging pipe (62) provided in the main body (61) so that the subcritical water can pass through an internal part of the main body (61); an introduced water heating tank (70) producing the subcritical water by heating the water transported from the heat exchanger (60); a reactor (80) producing purified soil by eliminating pollutants from the contaminated soil and releasing out the eliminated pollutants and the subcritical water to the heat exchanger (60); and a cooler (90) cooling the subcritical water mixed with the pollutants.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a contaminant soil remediation system using sub-

The present invention relates to an apparatus for purifying contaminated soil using a submillimeter, and more particularly, to a method and apparatus for purifying a soil contaminated with chemicals such as crude oil, oil, heavy metals, polycyclic aromatic hydrocarbons, explosives, And more particularly, to a contaminated soil remediation apparatus using aseismic coefficients.

The subcritical water, which is called the ideal low-cost "green" solvent, has a wide range of temperatures and pressures, and in these conditions the properties of water vary widely. For example, properties such as water polarity, viscosity, surface tension and the like can be rapidly changed. Using these various characteristics, there is a great advantage that the effect of removing the contaminants from the soil can be obtained without using the conventional chemical solvent.

Generally, water has a boiling point of 100 ° C at 1 atmospheric pressure. However, in the high pressure state, the liquid state is maintained even when the temperature is raised. The water with this state is called the submergence coefficient. When the temperature is raised above 374 ° C, supercritical water is obtained.

The subcritical water used in the present invention is water having a temperature ranging from 100 to 374 DEG C and a pressure ranging from 4 to 400 bar. In addition, the dielectric constant (ε) of the subcoordination temperature depends on the organic solvent such as methanol (ε = 32) and ethanol (ε = 24) within the range of 2 to 50, The dielectric constant of water at room temperature and normal pressure is ε = 79, and substances which are not soluble in water in this state can be dissolved and extracted in a subcritical state.

Oil spills due to offshore oil spills and ship accidents, oil spills due to accidents on oil fields, and soil contamination due to outflow of oil storage tanks in industrial areas are frequently occurring. In this contaminated soil, polycyclic aromatic hydrocarbons with high molecular weight and no volatility and polycyclic aromatic hydrocarbons composed of more than two benzene rings have persistence and accumulation and are highly degradable. Biological and physico-chemical methods are widely used to restore environmentally friendly soils contaminated with oil and PAHs.

The main techniques for treating organic pollutants from conventional contaminated soil include soil washing, thermal desorption, biological treatment, and the like. Soil cleansing technology is a technique to treat harmful organic contaminants attached to soil particles by using an appropriate detergent for contaminated soil. Thermal desorption is carried out by heating at 100 ~ 550 ℃ to desorb organic contaminants, It is a method of purifying exhaust gas. Biological treatment is a method of purifying organic pollutants by biodegradation using microorganisms. Soil physico-chemical properties affect the desorption rate, bioavailability, etc. of contaminants and also affect the purification and restoration of contaminated soil. Applying these techniques requires the choice of an appropriate detergent, may result in secondary treatment costs for dissolved contaminants, and has the disadvantage of prolonged processing time and inefficiency for quasi-volatile contaminants.

In addition, these treatment methods have limitations in treatment of soil contaminated with high concentrations, and high-concentration contaminated soil generally undergo thermal desorption and incineration. In the case of incineration treatment, it is treated at a high cost, and a complex treatment facility for prevention of air pollution after incineration is required.

On the other hand, researches on the oxidation reaction by ultrafiltration fluid for the processing of food, the decomposition of polymer materials, and the waste have been carried out at universities, research institutes and industries at home and abroad. By adding oxygen, hydrogen peroxide, and the like in the super critical fluid, it is possible to maximize the oxidation reaction. However, the oxidation reaction in the supercritical fluid may increase the corrosiveness to the oxidation reaction apparatus, which may cause the extraction and the reaction vessel to be destroyed, and increase the cost of the apparatus for preventing corrosion. Also, secondary treatment due to the substances generated in the oxidative decomposition reaction is also necessary. On the other hand, in the extraction by the asymptotic reduction of the oxidation reaction, the water is elevated to a high temperature under the condition of maintaining the constant pressure, and the contaminants in the soil are effectively extracted using the reduced coefficient of the dielectric constant and the polarity. Unlike the oxidation reaction, it is a soil remediation method that can dramatically reduce the amount of organic solvent used to extract pollutants in the environment, minimize the decomposition of organic pollutants, and simplify the process after treatment. In order to recover environmentally friendly soil contaminated with organic pollutants, it is necessary to overcome the limitations of existing methods, to remove pollutants by using pure water, to increase the removal efficiency of residual pollutants, There is still a need for development of a soil remediation apparatus using the soil.

Korean Registered Patent Publication No. 1339775 Korean Registered Patent Publication No. 1038686 Korean Registered Patent Publication No. 1276118

It is an object of the present invention, which has been devised to solve the problems as described above, to solve the channeling phenomenon of contaminated soil reacting with generation of ash coefficient and the like, thereby improving purification efficiency and using high- The waste water from the ash counting reactor is preheated, and the waste water discharged from the ash counting reactor is cooled by using the process water at room temperature flowing into the ash counting reactor. As a result, And to provide a polluted soil purification apparatus using the coefficient.

According to an embodiment of the present invention, there is provided a contaminated soil purging apparatus using a submerged soil counting apparatus, comprising: a water tank for storing water for generating a submerged coefficient; A pump 20 for pressurizing the water transferred from the water tank 10; A bypass valve 30 for distributing and transferring the water transferred from the pump 20 to the water tank 10 and the storage tank 40; A storage tank (40) for storing the water transferred from the bypass valve (30); A pressure regulator (50) for pressurizing or depressurizing the water transferred from the storage tank (40) under a pressure condition of a subcritical state; A main body 61 through which the water transferred from the pressure regulator 50 passes and a heat exchange tube 62 provided inside the main body 61 so that the submergence coefficient passes through the inside of the main body 61, A heat exchanger (60) comprising; An inflow water heating tank (70) for heating the water transferred from the heat exchanger (60) to a temperature condition of a subcritical state to generate a subcritical coefficient; The ash coefficient transferred from the inflow water heating tank 70 is passed through the contaminated soil loaded therein to remove contaminants from the contaminated soil to produce a purified soil and the removed contaminants and the ash coefficient are supplied to the heat exchanger 60, To the reactor (80); And a cooler (90) for cooling the subcooler discharged from the reactor (80) and mixed with contaminants transferred through the heat exchanger (60) to cool the subcooled water with the contaminant mixed water at room temperature, The heat exchanger (60) includes a heat exchange tube (62) through which the subcooling coefficient passes so that heat exchange is performed between the water and the submergence coefficient. The inflow water heating tank (70) and the cooler .

A first valve (not shown), which is provided between the pressure regulator (50) and the heat exchanger (60) and controls the transfer of water having a sub-critical pressure condition to the heat exchanger (60) (120); A second valve (130) provided between the heat exchanger (60) and the cooler (90) for controlling the delivery of the subcooling water transferred from the heat exchanger (60) to the cooler (90); And the first valve 120 and the second valve 130 are opened to transfer the water and the submerged coefficient and the first valve 120 and the second valve 130 are maintained at predetermined intervals And shutting off the water and the ash coefficient from being conveyed, thereby periodically passing the submerged coefficient to the contaminated soil loaded in the reactor.

In addition, water having a sub-critical pressure condition transferred from the first valve 120 is provided between the first valve 120 and the heat exchanger 60 and is transferred to the heat exchanger 60 A first cylinder 140; And a second cylinder 150 provided between the heat exchanger 60 and the second valve 130 and adapted to be passed through the heat exchanger 60 and conveyed to the cooler 90 The control unit closes the first valve 120 and the second valve 130 to block the transfer of water and subclaims and controls the first cylinder 140 and the second cylinder 150 So as to be reciprocated between the first cylinder (140) and the second cylinder (150).

The first cylinder 141 has a first case 141 formed with a space in which the conveyance line to which the picked-up coefficient is to be conveyed is coupled to the upper side and the picked-up coefficient is introduced into the first case 141, A first piston 142 that is vertically movable in the interior of the first piston 142 and separates the upper and lower portions into a first upper space 145 and a first lower space 146, And a driving unit 144 that moves the shaft 143 and the shaft 143 up and down to reduce or expand the first upper space 145. The second cylinder 150 is rotated by the feed A second case 151 which is coupled to an upper portion of the second case 151 and has a space for allowing the submergence factor to flow therein, And a second piston (152) separating the first piston (152) into a second lower space (155), and when the shaft (143) is raised, The piston 142 is lifted so that the first upper space 145 is contracted and the second piston 152 is lowered so that the second upper space 154 is expanded and the second upper space 154 is loaded with the sub- When the shaft 143 is lowered, the first piston 142 is lowered to expand the first upper space 145 and the second piston 152 to be raised to the second upper space 154, And the first upper space (145) has an attraction coefficient.

The second cylinder 150 may be disposed below the first case 141 and the second case 151 and may be configured such that when the first piston 142 is moved up and down by the shaft 143, And a connection pipe (153) through which the fluid filled in the first lower space (146) and the second lower space (155) is reciprocated. The fluid flows into the second lower space 155 from the first lower space 146 to the first lower space 146 along the connection pipe 153 and the shaft 143 is lowered from the first lower space 146 to the second lower space 155, 153 and the inner space of the first case 141 and the second case 151 is automatically changed in accordance with the up and down rivers of the shaft 143. [

A waste water heating tank (not shown) is disposed between the reactor 80 and the heat exchanger 60 to transfer the ash factor to the contaminants discharged from the reactor 80, and maintains the sub- Wherein the first valve 120 and the second valve 130 are solenoid valves and the first valve 120 and the second valve 130 are closed by a control unit The subcooling between the first valve 120 and the second valve 130 is controlled by the inflow water heating tank 70 and the drain water heating tank 160 while maintaining the subcritical pressure at a subcritical temperature And is passed through the reactor (80).

The basket 80 is disposed inside the reactor 80 and contains contaminated soil. The contaminated soil stored in the basket is discharged to the inflow water heating tank 70 and the drain water heating tank 160, And a filter portion surrounding the predetermined portion. The basket is detachably installed in the reactor (80).

The effect of the present invention as described above is that the first valve 120, the second valve 130, the first cylinder 140, the second cylinder 150, the inflow water heating tank 70, the drain water heating tank 160 ), It is possible to solve the phenomenon of the contaminated soil channeling loaded in the reactor by using the submergence coefficient, thereby improving the purification efficiency.

The apparatus for purifying contaminated soil according to the present invention includes a reactor 80, an influent water heating tank 70 and a drain water heating tank 160 ), And has the effect of shortening the process time required for the temperature rise and cooling of the process water.

FIG. 1 is a schematic view showing a contaminated soil purification apparatus using an index of refraction according to a preferred embodiment of the present invention.
FIG. 2 is a flowchart illustrating a continuous mode using a contaminated soil remediation apparatus using an index coefficient according to a preferred embodiment of the present invention.
FIG. 3 is a flowchart illustrating a mixing mode using a contaminated soil purging apparatus using subcodes according to a preferred embodiment of the present invention, in which the submergence coefficient is transferred from the first cylinder to the second cylinder.
FIG. 4 is a flowchart illustrating a mixing mode using a contaminated soil remediation apparatus using an ase coefficient according to a preferred embodiment of the present invention, in which the aseism coefficient is transferred from the second cylinder to the first cylinder.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to achieve them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a contaminated soil remediation apparatus using a subcount according to embodiments of the present invention.

FIG. 1 is a schematic view showing a contaminated soil purification apparatus using an index of refraction according to a preferred embodiment of the present invention. FIG. 2 is a flowchart illustrating a continuous mode using a contaminated soil remediation apparatus using an index coefficient according to a preferred embodiment of the present invention.

1 and 2, the apparatus for purifying contaminated soil using the subcycle according to the present invention comprises a water tank 10, a pump 20, a bypass valve 30, a storage tank 40, a pressure regulator 50, A heat exchanger 60, an influent water heating tank 70, a reactor 80, and a cooler 90.

First, in the water tank 10, water for generating a submerged coefficient is stored.

The pump 20 pressurizes the water conveyed from the water tub 10. At this time, the pressure at which the pump 20 is pressurized is 4 bar to 127 bar.

The bypass valve 30 distributes and transfers the water transferred from the pump 20 to the water tank 10 and the storage tank 40.

At this time, the bypass valve 30 is provided between the pump 20 and a storage tank 40 to be described later.

This is because, when the pump 20 pumps the water, when the water to be pumped is directly transferred to the storage tank 40, an overpressure is generated in the transfer line and a pulsation phenomenon occurs. That is, the bypass valve 30 is provided between the pump 20 and the storage tank 40 in order to reduce pulsation.

Here, the transfer line is a pipe connecting the respective components described in the present invention so that the water or limulus coefficient can be transferred.

The storage tank (40) stores the water conveyed from the bypass valve (30).

The pressure regulator (50) pressurizes or depressurizes the water conveyed from the storage tank (40) under a subcritical pressure condition. At this time, the pressure regulator 50 can pressurize or depressurize from 4 bar to 400 bar, preferably from 4 bar to 127 bar, which is a subcritical pressure condition of water.

The heat exchanger (60) includes a main body (61) and a heat exchange pipe (62).

The main body 61 is formed in a hollow shape to allow water conveyed from the pressure regulator 50 to pass therethrough and the water to be passed is conveyed to an inflow water heating tank 70 to be described later.

The heat exchange pipe 62 is provided inside the main body 61 so that an ash coefficient discharged from the reactor 80 to be described later can pass through the inside of the main body 61. That is, the heat exchange tube 62 is provided inside the main body 61 so as to penetrate the water passing through the inside of the main body 61, but is spirally formed so as to have a long length.

This is to allow heat exchange between the high temperature ash discharged from the reactor 80 to be described later and the low temperature water transferred to the inflow water heating tank 70.

In addition, the sub-circulation circulation between the first cylinder 140 and the second cylinder 150, which will be described later, is performed through a heat exchanger 60 through a mixing mode, which will be described later, The cooler 90 and the drain water heating tank 160 can be reduced to reduce the size of the equipment and reduce energy consumption due to the reduction of equipment cost and maintenance. In addition, it is possible to shorten the processing time due to the increase in temperature and cooling of the water and the ash coefficient, thereby reducing the purification time of the soil pollution, and the efficiency can be increased.

The influent water heating tank 70 heats the water conveyed from the heat exchanger 60 to a temperature condition of a subcritical state to generate subcriteria coefficients.

At this time, the influent water heating tank 70 can heat the water at 100 ° C. to 374 ° C., which is a subcritical condition of water, and preferably 100 ° C. to 320 ° C.

The reactor 80 passes the ash coefficient transferred from the inflow water heating tank 70 to the contaminated soil loaded therein to remove contaminants from the contaminated soil to produce a purified soil, And discharged to the heat exchange pipe (62) of the unit (60).

The reactor 80 includes a basket and a filter portion.

The basket is installed inside the reactor (80) and the contaminated soil is loaded.

The filter unit is installed at the upper and lower portions of the reactor 80 to prevent the contaminated soil from being discharged to the inflow water heating tank 70 and the drain water heating tank 160.

The filter portion has pores of 25 mu m to 40 mu m.

The cooler 90 cools the subcooled mixture discharged from the reactor 80 and passes through the heat exchange pipe 62 of the heat exchanger 60 to cool the mixed subcooled water with a mixture of contaminants.

In other words, since the cooler 90 cools the already-changed ash coefficient from the high temperature to the low temperature through the heat exchanger 60, the capacity of the cooler 90 can be greatly reduced, thereby saving energy.

Meanwhile, the contaminated soil purification apparatus using the subcycle according to the present invention further includes a flow rate controller 100 and a density separator 110.

The flow rate controller 100 constantly adjusts the flow rate of the ambient temperature mixed with the contaminants transferred from the cooler 90.

The density separator 110 separates water at room temperature mixed with contaminants transferred from the flow rate controller 100 into water at room temperature and contaminants by density difference, discharges water at room temperature to the water tank 10, Store contaminants and vapor.

Therefore, the contaminated soil purging apparatus using the subclaim according to the present invention can purify the contaminated soil through the continuous mode in which the submerged coefficient is continuously passed through the contaminated soil loaded in the reactor 80.

At this time, the contaminated soil loaded in the reactor 80 is channeled as the asymptotic coefficient passes only in one direction.

Channeling refers to a phenomenon in which a fluid flows locally to a low density portion and does not flow uniformly throughout the layer. That is, a passage through which the ash coefficient flows is formed in the contaminated soil.

FIG. 3 is a flowchart illustrating a mixing mode using a contaminated soil purging apparatus using subcodes according to a preferred embodiment of the present invention, in which the submergence coefficient is transferred from the first cylinder to the second cylinder. FIG. 4 is a flowchart illustrating a mixing mode using a contaminated soil remediation apparatus using an ase coefficient according to a preferred embodiment of the present invention, in which the aseism coefficient is transferred from the second cylinder to the first cylinder.

3 and 4, the contaminated soil purification apparatus using the subcycle according to the present invention includes a first valve 120, a second valve (not shown), a second valve 130, a control unit, a first cylinder 140, and a second cylinder 150.

The first valve 120 is provided between the pressure regulator 50 and the heat exchanger 60 and controls the transfer of the water having the sub-critical pressure condition transferred from the pressure regulator 50 to the heat exchanger 60 do.

The second valve 130 is provided between the heat exchanger 60 and the cooler 90 to control the delivery of the submergence coefficient transferred from the heat exchanger 60 to the cooler 90.

At this time, the first valve 120 and the second valve 130 are solenoid valves, which are opened and closed by a control unit to be described later. That is, when the first valve 120 and the second valve 130 are opened, the transfer line is opened to allow the submergence coefficient and water to flow. When the first valve 120 and the second valve 130 are closed, the transfer line is closed so that the submersion coefficient and water do not flow.

In addition, the subcritical pressure between the first valve 120 and the second valve 130 when the first valve 120 and the second valve 130 are closed by the control unit can be maintained at subcritical pressure . In addition, the submergence coefficient between the first valve 120 and the second valve 130 is maintained at the subcritical temperature by the influent water heating tank 70 and a drain water heating tank 160 to be described later. Accordingly, the submerging coefficient can be passed through the reactor 80 in the mixing mode.

The controller controls the first valve 120 and the second valve 130 to be opened and the water and the aspiration coefficient to be transferred, Thereby shutting off the water and the submergence coefficient so as to periodically pass the submerged coefficient to the contaminated soil loaded in the reactor 80.

That is, the contaminated soil purification apparatus using the subcycle according to the present invention includes a cyclic mode in which the first valve 120 and the second valve 130 are opened and closed at predetermined time intervals and the submerged coefficient is passed through the reactor 80 Can be operated.

The first cylinder 140 is provided between the first valve 120 and the heat exchanger 60 and water having a subcritical pressure condition transferred from the first valve 120 is passed through the heat exchanger 60).

The first cylinder 140 includes a first case 141, a first piston 142, a shaft 143, and a driving unit 144.

In the first case 141, a space is formed so that the transfer line on which the sub-coefficient is transferred is coupled to the upper side and the sub-charge is introduced to the inside.

The first piston 142 is vertically movable within the first case 141 to separate the upper and lower portions into a first upper space 145 and a first lower space 146.

The shaft 143 is engaged with the lower side of the first piston 142.

The driving unit 144 is coupled to the lower end of the shaft 143 to move the shaft 143 up and down to shrink or expand the first upper space 145.

The second cylinder 150 is provided between the heat exchanger 60 and the second valve 130 and is passed through the cooler 90 through the subcooling conveyed from the heat exchanger 60.

The second cylinder (150) includes a second case (151) and a second piston (152).

In the second case 151, a space is formed such that the transfer line on which the sub-coefficient is transferred is coupled to the upper side and the sub-charge is introduced to the inside.

The second piston 152 is vertically movable within the second case 151 to separate the upper and lower portions into a second upper space 154 and a second lower space 155.

At this time, the control unit closes the first valve 120 and the second valve 130 to block the transfer of water and subcodes, controls the first cylinder 140 and the second cylinder 150, So that the asymptotic coefficient is reciprocated between the cylinder 140 and the second cylinder 150.

That is, when the shaft 143 is lifted, the first piston 142 is lifted to reduce the first upper space 145 and the second piston 152 to lower the second upper space 154, 2 upper space 154. In this case,

When the shaft 143 is lowered, the first piston 142 is lowered to expand the first upper space 145 and the second piston 152 to be lifted to reduce the second upper space 154, 1 < / RTI >

Accordingly, the contaminated soil purification apparatus using the subordinate coefficient according to the present invention closes the first valve 120 and the second valve 130, and moves the first piston 142 of the first cylinder 140 up and down The subcycle is circulated between the first cylinder 140 and the second cylinder 150 and operated in a mixing mode in which the channeling of the contaminated soil loaded in the reactor 80 is scattered.

On the other hand, the second cylinder 150 further includes a connection pipe 153.

The connection pipe 153 is provided at the lower part of the first case 141 and the second case 151 so that when the first piston 142 is moved up and down by the shaft 143, The fluid filled in the second lower space 155 is reciprocated.

At this time, when the shaft 143 rises, the fluid is transported along the connection pipe 153 from the second lower space 155 to the first lower space 146, and when the shaft 143 is lowered, 146 to the second lower space 155 along the connection pipe 153.

The inner space of the first case 141 and the second case 151 is automatically changed in accordance with the vertical axis of the shaft 143.

That is, when the shaft 143 descends, the fluid in the first lower space 146 is pressurized and moved to the second lower space 155 through the connection pipe 153, and the second piston 152 is raised . Accordingly, the second upper space 154 is pressurized, and the sub-coefficients transferred to the second upper space 154 are transferred to the first upper space 145 while being reverse-circulated.

When the shaft 143 rises, the fluid transferred to the second lower space 155 as the first lower space 146 is inflated is transferred to the first lower space 146 through the connection pipe 153 The second piston 152 is lowered. Accordingly, the submerged iron particles transferred to the first upper space 145 are transferred to the second upper space 154 simultaneously with the positive rotation.

In this way, the channeling phenomenon is eliminated according to the mixing mode in which the submixing coefficient is circulated between the first cylinder 140 and the second sill cylinder, thereby maximizing the pollutant removal rate of the contaminated soil.

Meanwhile, the contaminated soil remediation apparatus using the subclaim according to the present invention further includes a drainage water heating tank 160.

The effluent heating tank 160 is provided between the reactor 80 and the heat exchanger 60 so that the ash factor with the contaminant discharged from the reactor 80 is transferred to maintain the subcritical temperature .

Here, the drainage water heating tank 160 is connected to the second cylinder 150 before being conveyed to the reactor 80 when the subcycle is reversely circulated from the second cylinder 150 to the first cylinder 140 in the mixing mode And the transferred limulus coefficient is heated so as to be maintained at the subcritical temperature.

Therefore, when the first valve 120 and the second valve 130 are closed by the control unit, the subcoil between the first valve 120 and the second valve 130 is maintained at the sub- Is maintained at the subcritical temperature by the inflow water heating tank (70) and the drain water heating tank (160) and passes through the reactor (80).

Hereinafter, an experiment according to the contaminated soil remediation apparatus using the subcount of the present invention will be described.

After treating the contaminated soils with contaminated soil remediation equipment using the ash factor, the residues of contaminated soil were measured as follows. Transfer soil samples (approx. 10 g) treated in contaminated soil remediation equipment using subcriteria to a 250 ml beaker, add a sufficient amount of anhydrous sodium sulfate and mix well, then add 100 ml of dichloromethane for GC analysis. Extract for 3 minutes using an ultrasonic extractor and filter out the extract with a 5B open-topped funnel. The extract obtained by repeating this operation twice was concentrated to 2 ml with a rotary evaporator and 0.3 g of silica gel was added to the concentrated extract for the purpose of removing the interfering substances. After shaking for 5 minutes, the supernatant was added to 2 ml of vial And analyzed by transfer gas chromatography. The analysis conditions of gas chromatography are as follows.

- Analysis conditions -

Detector: Flame Ionization Detector (FID)

Column: DB-5 (30m * 0.32mm * 0.25μm)

Temperature: 45 ° C (2 minutes) -> [10 ° C / minute] -> 310 ° C (25 minutes)

Sample inlet temperature: 280 ° C

Detector temperature: 300 ° C

Carrier gas (helium): 2 ml / min.

[Comparative Example]

The petroleum total hydrocarbon (TPH) concentration was measured by preparing crude oil contaminated soil and extracting contaminants from the contaminated soil of crude oil contaminated soil, and the calculated results are shown in Table 1 below.

[Example 1]

5 kg of crude oil contaminated soil was loaded into a reactor 80 using a basket and the crude oil contaminated soil loaded in a reactor 80 having a pressure of 60 bar and a temperature of 275 ° C was subjected to a continuous mode And then the temperature and the pressure of the reactor 80 are adjusted to room temperature and normal pressure. Thereafter, the temperature of the reactor 80 and the pressure of the contaminants remaining in the contaminated soil of the oil- The results of calculating the TPH concentration are shown in Table 1 below.

[Example 2]

5 kg of crude oil contaminated soil was loaded into a reactor 80 using a basket and the crude oil contaminated soil loaded in a reactor 80 having a pressure of 60 bar and a temperature of 275 캜 was subjected to a cyclic mode And then the temperature and the pressure of the reactor 80 are adjusted to the normal temperature and the normal pressure. Thereafter, the temperature of the reactor 80 and the pressure of the pollutants remaining in the contaminated soil of the oil- The results of calculating the TPH concentration are shown in Table 1 below.

[Example 3]

5 kg of crude oil contaminated soil is loaded into the reactor 80 using a basket and the first valve 120 and the second valve 130 are placed in the crude oil contaminated soil loaded in the reactor 80 having a pressure of 60 bar and a temperature of 275 degrees Channeling of the contaminated soil loaded in the reactor 80 through the reciprocating motion of the first cylinder 140 and the second cylinder 150 is performed by locally flowing the low- After the temperature and pressure of the reactor 80 are adjusted to room temperature and normal pressure, the reactor 80 is heated in a mixing mode (Mixing mode) The results of calculating TPH concentrations of the remaining contaminants are shown in Table 1 below.

Crude oil contaminated soil Extraction time
(minute) Extraction temperature
(° C) Extraction pressure
(bar) Residual TPH
Concentration (mg / kg) Removal rate
(%) Comparative Example
(Control group) - - - 5408 - Example 1
(Continuous mode) 60 275 65 668.2 87.6 Example 2
(Cycle mode) 60 275 65 395.9 92.7 Example 3
(Mixing mode) 60 275 65 265.6 95.1

As a result, according to the experiment data of the embodiment, the contaminated soil purging apparatus using the subcycle according to the present invention can confirm that the periodic mode is more efficient than the continuous mode, and the mixing mode is more efficient than the cyclic mode .

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10: water tank 20: pump
30: Bypass valve 40: Storage tank
50: pressure regulator 60: heat exchanger
61: main body 62: heat exchange tube
70: Inflow water heating tank 80: Reactor
90: Cooler 100: Flow rate regulator
110: density separator 120: first valve
130: second valve 140: first cylinder
141: first case 142: first piston
143: shaft 144:
145: first upper space 146: first lower space
150: second cylinder 151: second case
152: second piston 153: connecting pipe
154: second upper space 155: second lower space
160: drain water heating tank

Claims (6)

delete delete A water tank (10) in which water for generating a submerged coefficient is stored;
A pump 20 for pressurizing the water transferred from the water tank;
A bypass valve 30 for distributing and transferring the water transferred from the pump 20 to the water tank 10 and the storage tank 40;
A storage tank (40) for storing the water transferred from the bypass valve (30);
A pressure regulator (50) for pressurizing or depressurizing the water transferred from the storage tank (40) under a pressure condition of a subcritical state;
A main body 61 through which the water transferred from the pressure regulator 50 passes and a heat exchange tube 62 provided inside the main body 61 so that the submergence coefficient passes through the inside of the main body 61, A heat exchanger (60) comprising;
An inflow water heating tank (70) for heating the water transferred from the heat exchanger (60) to a temperature condition of a subcritical state to generate a subcritical coefficient;
The ash coefficient transferred from the inflow water heating tank 70 is passed through the contaminated soil loaded therein to remove contaminants from the contaminated soil to produce a purified soil and the removed contaminants and the ash coefficient are supplied to the heat exchanger 60, To the reactor (80); And
And a cooler (90) for cooling the subclaim mixed with the pollutant discharged from the reactor (80) and passing through the heat exchanger (60)
The reactor 80 is operated in a continuous mode in which the submerged coefficient transferred from the influent heating tank 70 is continuously passed through the contaminated soil loaded in the reactor 80,
The heat exchanger (60) includes a heat exchange pipe (62) through which the subcooling coefficient passes so that heat exchange is performed between the water and the subcooling water. The inflow water heating tank (70) Can be reduced,
A first valve 120 provided between the pressure regulator 50 and the heat exchanger 60 for controlling the transfer of water having a sub-critical pressure condition to be transferred from the pressure regulator 50 to the heat exchanger 60; );
A second valve (130) provided between the heat exchanger (60) and the cooler (90) for controlling the delivery of the subcooling water transferred from the heat exchanger (60) to the cooler (90); And
The first valve 120 and the second valve 130 are opened to transfer the water and the limp coefficient and the first valve 120 and the second valve 130 are closed for a preset time at predetermined time intervals, Further comprising a control unit operable in a cyclic mode in which water and limulus coefficients are prevented from being fed to periodically pass the limp coefficient to the contaminated soil loaded in the reactor (80)
And a second valve (120) provided between the first valve (120) and the heat exchanger (60) for passing water having a subcritical pressure condition transferred from the first valve (120) 1 cylinder 140;
And a second cylinder 150 provided between the heat exchanger 60 and the second valve 130 and adapted to be passed through the heat exchanger 60 and conveyed to the cooler 90 and,
The controller closes the first valve 120 and the second valve 130 to shut off the transfer of water and the subcylinder coefficient and controls the first cylinder 140 and the second cylinder 150, Wherein the apparatus operates in a mixing mode in which an indexing coefficient is reciprocally transferred between the first cylinder (140) and the second cylinder (150).
The method of claim 3,
The first cylinder (140) includes a first case (141) formed with a space in which the conveyance line to which the picked-up coefficient is conveyed is coupled to the upper side and the picked-up coefficient is introduced into the first case, A first piston 142 which is vertically movable so as to separate upper and lower parts into a first upper space 145 and a first lower space 146; a first piston 142, which is coupled to a lower side of the first piston 142, And a driving unit 144 that moves the shaft 143 up and down to reduce or expand the first upper space 145,
The second cylinder 150 has a second case 151 formed with a space in which the conveyance line to which the picked-up coefficient is conveyed is coupled to the upper side and the picked-up coefficient is introduced into the first case 151, And a second piston (152) provided so as to be movable upward and downward and separating upper and lower parts into a second upper space (154) and a second lower space (155)
When the shaft 143 is lifted, the first piston 142 is lifted to reduce the first upper space 145 and the second piston 152 is lowered to expand the second upper space 154 An asymptotic coefficient is introduced into the second upper space 154,
When the shaft 143 is lowered, the first piston 142 is lowered so that the first upper space 145 is expanded and the second piston 152 is moved upward to reduce the second upper space 154 And the ash coefficient is introduced into the first upper space (145).
5. The apparatus of claim 4, wherein the second cylinder (150)
The first case 141 and the second case 151 are provided below the first case 141 and the second case 151. When the first piston 142 is moved up and down by the shaft 143, And a connection pipe (153) through which the fluid filled in the lower space (155) is reciprocated,
When the shaft 143 rises, the fluid is transferred from the second lower space 155 to the first lower space 146 along the connection pipe 153. When the shaft 143 is lowered, Is transported along the connection pipe (153) from the space (146) to the second lower space (155)
Wherein the internal space of the first case (141) and the second case (151) is automatically changed in accordance with the vertical axis of the shaft (143).
The method of claim 3,
A drain water heating tank 160 disposed between the reactor 80 and the heat exchanger 60 for transferring contaminants discharged from the reactor 80 and a subcooling coefficient, ; ≪ / RTI >
The first valve 120 and the second valve 130 may be solenoid valves,
When the first valve 120 and the second valve 130 are closed by the control unit, the submergence coefficient between the first valve 120 and the second valve 130 is maintained in a state where the subcritical pressure is maintained Is maintained at a sub-critical temperature by the inflow water heating tank (70) and the effluent water heating tank (160), and passes through the reactor (80).

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