KR20170011271A

KR20170011271A - Purification and oils recovery unit of contaminated soil using subcritical water

Info

Publication number: KR20170011271A
Application number: KR1020150103610A
Authority: KR
Inventors: 박정훈; 조영태
Original assignee: 전남대학교산학협력단
Priority date: 2015-07-22
Filing date: 2015-07-22
Publication date: 2017-02-02

Abstract

The present invention relates to a water tank (10) in which water is stored; A pump 20 for pressurizing the water transferred from the water tub 10; A storage tank (30) for storing the water transferred from the pump (20); A distributor / distributor 40 for distributing and transferring the water transferred from the storage tank 30 to the water tank 10 and the pressure regulator 50; A pressure regulator 50 for pressurizing or depressurizing the water transferred from the distributor / transporter 40 to a subcritical pressure condition; A preheater (60) for heating the water transferred from the pressure regulator (50) to a temperature condition of a subcritical state to generate a subcritical coefficient; A reactor (70) for passing the submerged coefficient transferred from the preheater (60) through the contaminated soil loaded therein to dissolve contaminants contained in the contaminated soil into the submerged coefficient; A tube particle remover 80 for filtering particles, floating matters, and impurities of contaminants included in the submixture transferred from the reactor 70; A heat exchanger (90) for cooling the subcritical water transferred from the tube particle remover (80) to generate water at room temperature; A flow rate controller 100 that adjusts the flow rate of the water at room temperature sent from the heat exchanger 90 to a constant value; And a density separator 110 for separating the water at room temperature transferred from the flow rate regulator 100 by density difference and discharging the oil to the oil collecting tank 120 and discharging the water at room temperature to the water tank 10 .

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for purifying contaminated soil and a method for recovering contaminated soil using subcritical water,

The present invention relates to a method for purifying a contaminated soil, and more particularly, to a method for purifying a contaminated soil by extracting pollutants including oil, polyunsaturated hydrocarbons, explosives, And a device for recovering the oil contained in the pollutant.

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 degrees at 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 increased to 374 ° C or more, supercritical water is obtained. The subcritical water used in the present invention is water at a temperature of 100 to 374 degrees and a pressure of 4 to 400 bar. The dielectric constant (ε) according to the temperature of the submersion coefficient is similar to the organic solvent such as methanol (ε = 32) and ethanol (ε = 24) within a range of 2 to 50, The dielectric constant of water at room temperature and normal pressure is ε = 79. In this state, substances that are not dissolved in water can also be dissolved and extracted in the asymmetric state.

Oil spills due to marine oil spills and ship overturning accidents and soil contamination due to leakage of gas stations and oil storage tanks throughout the country are frequently occurring. Polycyclic aromatic hydrocarbons, which are compounds with two or more benzene rings, are highly persistent and accumulative 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 soils include soil washing, steam extraction, and the like. Soil cleansing technique is a technique to treat contaminated soil by separating harmful organic contaminants attached to soil particles by using appropriate detergent. In the case of steam extraction, the soil is vacuumed by the vacuum pump in the unsaturated water layer, It is a restoration technology to remove semi-volatile contaminants. 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 soil contaminated with high concentrations is generally incinerated. 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.

In domestic universities, overseas universities, research institutes and industries, many researches have been carried out on the oxidation reaction by ultrafiltration fluid for food processing, decomposition of polymer materials, and waste.

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 soils contaminated with organic contaminants, it is necessary to overcome the limitations of existing methods, to remove contaminants by using pure water, to increase the removal efficiency of residual contaminants, to recover the removed oil, It is still required to develop a soil remediation method using a limulus coefficient and a device capable of operating the soil remediation method.

Accordingly, the applicant of the present invention has attempted to solve the above-mentioned problems by improving the contaminated soil purification apparatus using the subcodes of Korean Patent No. 10-1339775.

However, according to the prior art, since the reactor is composed of one reactor, it is possible to rapidly supply the thermal energy to the water when the amount of the contaminated soil throughput of the reactor is increased (the reactor scale is increased) And there is a problem that the efficiency of the transfer of pollutants contained in the contaminated soil is reduced.

In addition, the prior art has a problem that the pollutants separated from the density separator and the water at room temperature are passed through without being discharged to the outside, thereby making it difficult to recover the oil.

In addition, in the prior art, there is a problem that the ash coefficient discharged from the reactor is reduced to the room temperature by the heat exchanger in the state where the particles and the impurities are mixed, and these are included in the recovered oil.

Further, the conventional art has a problem in that when operating the submodule in a cyclic mode in which the submerged soil periodically passes through the contaminated soil loaded in the reactor, the entire apparatus must be periodically repeatedly operated.

Therefore, in order to solve the above-mentioned problems, there is a need for an improved soil purification and oil recovery system.

Korean Patent Registration No. 1339775 (December 4, 2013) Korean Patent Registration No. 1276118 (June 13, 2013) Korean Patent Registration No. 1038686 (May 27, 2011)

It is an object of the present invention to provide a contaminated soil purification and oil recovery apparatus capable of recycling a limp coefficient.

Another object of the present invention is to provide a contaminated soil purification and oil recovery apparatus capable of easily recovering the oil contained in pollutants extracted by the submerged factor after the submerged leaching of the pollutants contained in the contaminated soil .

The apparatus for purifying contaminated soil and collecting oil according to the present invention comprises a water tank (10) in which water is stored; A pump 20 for pressurizing the water transferred from the water tub 10; A storage tank (30) for storing the water transferred from the pump (20); A distributor / distributor 40 for distributing and transferring the water transferred from the storage tank 30 to the water tank 10 and the pressure regulator 50; A pressure regulator 50 for pressurizing or depressurizing the water transferred from the distributor / transporter 40 to a subcritical pressure condition; A preheater (60) for heating the water transferred from the pressure regulator (50) to a temperature condition of a subcritical state to generate a subcritical coefficient; A reactor (70) for passing the submerged coefficient transferred from the preheater (60) through the contaminated soil loaded therein to dissolve contaminants contained in the contaminated soil into the submerged coefficient; A tube particle remover 80 for filtering particles, floating matters, and impurities of contaminants included in the submixture transferred from the reactor 70; A heat exchanger (90) for cooling the subcritical water transferred from the tube particle remover (80) to generate water at room temperature; A flow rate controller 100 that adjusts the flow rate of the water at room temperature sent from the heat exchanger 90 to a constant value; And a density separator 110 for separating the water at room temperature transferred from the flow rate regulator 100 by density difference and discharging the oil to the oil collecting tank 120 and discharging the water at room temperature to the water tank 10 .

In addition, the reactor 70 is composed of a plurality of reactors 70, which are arranged in a row in parallel and connected to each other.

The reactor 70 includes a soil container 71 installed inside the reactor 70 and loaded with contaminated soil and a soil container 71 placed in the soil container 71 so as to be connected to the pre- And a soil filter 72 surrounding a predetermined portion of the soil container 71 so as not to be discharged to the reactor 90. The soil container 71 is detachably installed in the reactor 70 .

The reactor 70 further includes a drying valve 73 communicating with the upper end of the reactor 70 to discharge the steam generated by the ash permeation coefficient to the contaminated soil so that the contaminated soil is dried .

The contaminated soil purification and oil recovery apparatus 1000 using the subordinate coefficient may further include a plurality of discharge control valves 130 for regulating the amount of transfer of the subordinate coefficients respectively transferred from the plurality of reactors 70 to the tube particle remover 80 ); And a vowel tube (140) collecting and transferring the ash coefficients transferred from the plurality of discharge control valves (130) to the tube particle remover (80).

The tubular particle remover 80 is provided with a penetration-free inlet 81 for introducing the submerged coefficient transferred from the reactor 70 into the tubular particle remover 80, And a tube particle filter 82 for filtering the contaminant particles, suspended matter, and impurities contained in the submergence coefficient in which the water level rises in the tube particle remover 80 are installed.

In addition, the water tank 10 is provided with a screen filter 11 for filtering contaminants contained in water at room temperature transferred from the density separator 110.

Accordingly, the contaminated soil purification and oil recovery apparatus according to the present invention has an advantage that the ash coefficient can be recycled.

In addition, the contaminated soil purification and oil recovery apparatus according to the present invention can extract pollutants contained in contaminated soil using a density separator and can easily recover the oil contained in pollutants extracted from the contaminated soil There are advantages.

The apparatus for purifying contaminated soil according to the present invention comprises a plurality of reactors for extracting contaminants contained in contaminated soil by passing a submerged coefficient through contaminated soil loaded therein to maximize the purification capacity of the contaminated soil There is an effect that can be done.

FIG. 1 is a conceptual diagram of a contaminated soil purification and oil recovery apparatus using a subordinate coefficient according to the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

FIG. 1 is a conceptual diagram of a contaminated soil purification and oil recovery apparatus 1000 using a subordinate factor according to the present invention.

1, the contaminated soil purification and oil recovery apparatus 1000 using the subordinate coefficient according to the present invention includes a water tank 10, a pump 20, a storage tank 30, a distribution transmitter 40, A preheater 60, a reactor 70, a tube particle remover 80, a heat exchanger 90, a flow rate controller 100, a density separator 110 and a oil collecting tank 120 .

At this time, the components for generating the submerged coefficient are the water tank 10, the pump 20, the storage tank 30, the distribution transmitter 40, the pressure regulator 50 and the preheater 60, The components for extracting and recycling particles, impurities, and oil of pollutants included in the submerged coefficient into water are recycled to the heat exchanger 90, A heat exchanger 90, a flow rate controller 100, a density separator 110, and a oil collecting tank 120.

The water tank 10 stores water at room temperature for conversion into an index coefficient. At this time, the water at normal temperature may be water having a low inorganic content or water recycled in the process.

The pump 20 pressurizes the water transferred from the water tank 10 and uses the conventional industrial pump 20, so that the detailed description will be omitted.

The storage tank (30) stores the water transferred from the pump (20). More specifically, the storage tank 30 temporarily stores (pressurizes) the pressurized water by the pump 20.

The distribution transmitter 40 distributes and transfers the water conveyed from the storage tank 30 to the water tank 10 and the pressure regulator 50 and may be constituted by a three-way solenoid valve, but the present invention is not limited thereto.

At this time, the distributor / transporter 40 may be provided with a distribution sensor (not shown) for controlling the distribution ratio of water.

The distribution sensor controls the rate at which the distributor 40 distributes water to the water tank 10 and the pressure regulator 50 to prevent a large amount of water from being transferred to the pressure regulator 50.

The pressure regulator 50 pressurizes and depressurizes the water conveyed from the distributor / transporter 40 to a subcritical pressure condition. Here, the pressure condition of the subcritical state of water may be from 4 bar to 400 bar, and more preferably from 4 bar to 100 bar.

The preheater 60 converts the water transferred from the pressure regulator 50 into a subcritical state by heating the subcritical state of the water. Here, the temperature condition of the subcritical state of water may be from 100 degrees to 374 degrees.

The reactor (70) passes the submergence coefficient transferred from the preheater (60) to the contaminated soil loaded therein, and contaminants contained in the contaminated soil are eluted into the submerged coefficient. At this time, contaminant soil contained in the contaminated soil is converted into purified soil by the subcritical coefficient.

The reactor 70 passes the ash coefficient transferred from the preheater 60 through the contaminated soil loaded therein to remove the contaminants from the contaminated soil to produce a purified soil, and the ash coefficient, which is a mixture of contaminants and impurities, And then discharged to the remover 80.

In addition, the reactor 70 can be operated in a continuous mode in which the submerged coefficient is continuously passed through the contaminated soil loaded therein, but the periodic mode in which the submergence coefficient is repeatedly passed through the contaminated soil Lt; / RTI >

The tube particle remover 80 filters the particles, floors, and impurities of the contaminants contained in the submerged coefficient transferred from the reactor 70.

The heat exchanger 90 cools the subcooler transferred from the tube particle remover 80 to generate water at room temperature.

The flow rate controller 100 adjusts the flow rate of the water at a normal temperature, which is transferred from the heat exchanger 90, to a constant level. At this time, the flow rate regulator 100 may be composed of a needle valve, but the present invention is not limited thereto.

The density separator 110 separates the water at room temperature transferred from the flow rate controller 100 by density difference, discharges the oil contained in the water at room temperature to the oil collecting tank 120, and transfers the water at room temperature to the water tank 10 . That is, the submillimeter is recycled to the room temperature water through the tube particle remover 80, the heat exchanger 90, the flow rate regulator 100, and the density separator 110.

Accordingly, the contaminated soil purification and oil recovery apparatus 1000 according to the present invention has an advantage of being able to recycle the ash coefficient.

The apparatus 1000 for collecting and purifying contaminated soil according to the present invention is a system for collecting pollutants contained in contaminated soil using a density separator 110, There is an advantage that it can be easily recovered.

Meanwhile, the reactor 70 may be arranged in a row and arranged in parallel so as to maximize the throughput of contaminated soil, and may be connected to each other.

At this time, the plurality of reactors 70 can inject all the ash coefficients transferred from the preheater 60 or inject them individually.

Accordingly, the contaminated soil purification and oil recovery apparatus 1000 according to the present invention includes a plurality of reactors 70 that dissolve and extract contaminants contained in the contaminated soil by passing the ash coefficient through the contaminated soil loaded therein , It is possible to maximize the purification capacity of the contaminated soil.

The reactor 70 may further include a soil vessel 71, a soil filter 72, a drying valve 73, a cooling coil 74, a cooling means 75, a cooling fan 76, The container 71 may be detachably installed in the reactor 70.

The soil container 71 is formed in a structure corresponding to the inside of the reactor 70 and is installed inside the reactor 70 with the contaminated soil loaded therein.

The soil container 71 may be detachably installed in the reactor 70 using a door that is openable and closable on one side of the reactor 70.

The soil filter 72 surrounds a predetermined portion of the soil container 71 so that the contaminated soil loaded in the soil container 71 is not discharged to the preheater 60 and the heat exchanger 90.

The drying valve 73 communicates with the upper end of the reactor 70 to discharge the steam generated by the submerged leaching coefficient to the soil so as to dry the soil.

The cooling coil 74, the cooling means 75 and the cooling fan 76 prevent the reactor 70 from being overheated by the subzero coefficient transferred from the preheater 60, The reactor 70 is cooled to room temperature.

The cooling coil 74 is wound on the outer surface of the reactor 70 in the form of a spring, and may be made of a metal having a high thermal conductivity.

The cooling means 75 is connected to both ends of the cooling coil 74 to supply cold heat conduction or cooling water to both ends of the cooling coil 74 to provide cold heat.

The cooling fan 76 is installed at a predetermined distance from the reactor 70 to provide cool air to the reactor 70.

Meanwhile, the contaminated soil purification and oil recovery apparatus 1000 using the subclaim according to the present invention may further include a plurality of discharge control valves 130 and a collection tube 140.

The plurality of discharge control valves 130 regulate the transfer amount of the submillimeter transferred from each of the plurality of reactors 70 to the tubular particle remover 80 so as to prevent excessive amounts of submergence from being transferred to the tubular particle remover 80 .

The vowel tube 140 is a three-way valve for collecting and delivering the submerged transfer coefficients from the plurality of discharge control valves 130 to the tube particle remover 80.

On the other hand, the tube particle remover 80 can be provided with a penetration-free intrusion 81 and a tube particle filter 82, respectively.

The intrusion free inlet 81 introduces the submerged coefficient transferred from the reactor 70 into the lower side of the tube particle remover 80.

The tube particle filter 82 filters particles, suspended matter, and impurities of contaminants contained in the submergence coefficient gradually rising in the interior of the tube particle remover 80.

In other words, the tube-particle filter 82 removes particles, floats, and impurities of contaminants floating on the water surface of the submergence coefficient while the water surface of the submersion coefficient is in contact with the tube-particle filter 82 while the water level of the submersion coefficient rises, It is possible to maximize the removal efficiency of the particles, floats, and impurities of the contaminants contained in the coefficient.

The water tank 10 may be provided with a screen filter 11 for filtering the contaminants contained in the water at room temperature transferred from the density separator 110.

In addition, the contaminated soil purification and oil recovery apparatus 1000 using the subordinate coefficient according to the present invention may further include a thermostat 150.

The warmer 150 surrounds the preheater 60 and the reactor 70. The warmer 150 includes an electric heater 151 disposed inside the preheater 60 and the reactor 70. The heater 150 is connected to the preheater 60, Heat is maintained to keep the subcooler located inside the preheater 60 and the reactor 70 at the subcritical condition.

The thermosensor 150 includes a first temperature sensor 152 installed at one end of the preheater 60 and measuring the internal temperature of the preheater 60 and a second temperature sensor 152 disposed at one end of the reactor 70, The first temperature sensor 152 and the second temperature sensor 153 may be used to measure the temperature of the inside of the preheater 60 and the reactor 70. [ It is possible to more accurately maintain the subordinate coefficient located at the subcritical condition.

In addition, the thermosensor 150 can receive a phase change material (not shown) for maintaining the temperature between the inner surface and the outer surface.

At this time, the phase-change material accumulates heat energy through the phase change process or emits the stored heat energy, so that a kind of physical change process in which a substance changes from a solid state to a liquid state, from a liquid state to a solid state, from a liquid state to a gas state, It is a substance that uses heat to accumulate or store heat.

Further, a piezoelectric element (not shown) for applying ultrasonic vibration to the reactor 70 may be further provided.

Hereinafter, a method for purifying contaminated soil using the contaminated soil purification and oil recovery apparatus using the subclaim according to the present invention will be described.

1) The contaminated soil to be purified is loaded on the soil container 71, a predetermined portion of the soil container 71 is covered with the soil filter 72, and then the soil container 71 and the soil filter 72 are placed inside the reactor 70 Respectively.

2) The water stored in the water tank 10 is pressurized by the pump 20 and sequentially transferred to the storage tank 30, the distributor / transporter 40, and the pressure regulator 50. At this time, the distributor / transporter 40 may transfer some of the water transferred from the storage tank 30 to the water tub 10 so that the pressure regulator 50 is not overloaded.

3) The water is pressurized or depressurized in the subcritical state by using the pressure regulator 50 and transferred to the preheater 60.

4) By using the preheater 60, water is heated to a temperature condition of a subcritical state to generate an ash coefficient and transferred to the reactor 70.

5) By using the reactor 70, the submergence factor is passed through the contaminated soil loaded in the soil container 71 in the reactor 70 to extract the contaminants, ). At this time, the reactor 70 can be operated in a continuous mode or a cyclic mode. In addition, the reactor 70 can be cooled by the cooling coil 74, the cooling means 75, and the cooling fan 76 so that an excessive temperature rise due to the subzero coefficient can be prevented.

6) By using the tube particle remover 80, the particles, suspended matters and impurities of the contaminants contained in the submerged coefficient are filtered and transferred to the heat exchanger 90.

7) The heat exchanger 90 is used to cool the subcooling water, convert it into water at room temperature, and transfer it to the flow rate regulator 100.

8) Using the flow rate regulator 100, the flow rate of water at room temperature is adjusted to be constant and transferred to the density separator 110.

9) The density separator 110 discharges the oil contained in the water at room temperature to the oil collecting tank 120 and discharges the water at room temperature to the water tank 10.

Hereinafter, an experimental example in which the recovery of the polluted soil is confirmed by using the contaminated soil purification and oil recovery apparatus using the subclaim according to the present invention will be described in detail.

[Experimental Example]

[Method for measuring residual oil in contaminated soil]

After treating the oil contaminated soil with the apparatus of the present invention, the concentration of hydrocarbon oil residue, which is the residual oil in the contaminated soil, was measured as follows. Transfer the soil sample (about 10 g) treated in the apparatus of the present invention 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. 0.3 g of silica gel was added to the concentrated extract for shaking for 5 minutes, and the supernatant was added to 2 mL of Bai And then analyzed by gas chromatography. The analysis conditions of gas chromatography are as follows.

- Analysis conditions -

Detector: Flame Ionization Detector (FID);

Column: DB-5 (30 m * 32 mm * 0.25 m);

Oven temperature: 45 占 폚 (2 minutes)? [10 占 폚 / min]? 310 占 폚 (25 minutes);

Sample material inlet temperature: 280 ° C

Detector temperature: 300 ° C

Carrier gas (helium): 2 mL / min.

[Method of measuring the oil recovered in the apparatus of the present invention]

The chemical components and the high calorific value of the oil recovered in the apparatus of the present invention were measured by an element analyzer as follows. 0.5 g to 1 g of the oil sample collected from the apparatus of the present invention is injected into the combustion tube, and the sample burned at about 1,000 ° C. is reduced in the reaction tube, separated by the component according to the moving speed while passing through the GC column, . The column used is Porapack PQS (C, H, N, S component) and SM3A (O component). Also, the high calorific value (HHV) was calculated using each component ratio data.

- High calorific value formula -

HHV (MJ / kg) = 0.3383 * C + 1.422 * (H? O / 8)

[Comparative Example 1]

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

[Comparative Example 2]

The elemental ratios and high calorific value (HHV) of the major elements carbon, hydrogen, nitrogen, sulfur, and oxygen in crude oil were measured and the calculated results are shown in Table 2 below.

[Example 1 using residual oil measurement method of contaminated soil]

The soil contaminated with crude oil was placed in a soil container in the reactor, the pressure was adjusted to 60 bar, and water was pumped into the preheater at a rate of 1 mL / min. At the same time, the reactor temperature was maintained at 275 DEG C for 60 minutes. After the reaction was completed, the temperature and pressure were both adjusted to room temperature and normal pressure. The concentration of the contaminants remaining in the soil in the soil container and the recovered oil separated from the extracted water were calculated and the results are shown in Table 1.

Crude oil contaminated soil Extraction time Extraction temperature TPH concentration (mg / kg) Removal rate (%) Oil recovery ratio (%) Comparative Example 1 - - 20,549 - - Example 1 60 275 230 95 91.1

[Example 2 using the method of measuring the oil recovered in the apparatus of the present invention]

Table 2 shows the calculation results of the elemental ratio and the high calorific value of the recovered oil in the apparatus of the present invention.

Crude oils and oils Member Consumption Rate (%) High calorific value (HHV) C H N S O Comparative Example 2 85.14 11.88 0.75 0.02 2.21 45.30 Example 2 85.97 11.14 0.84 0.16 3.45 44.31

At this time, the soil contaminated with crude oil was used as the soil material contaminated with crude oil, but the present invention is not limited thereto.

Thus, it can be seen that the apparatus of the present invention can easily recover the oil contained in the pollutant extracted by the sub-coefficient.

Reference numeral 160 is a pressure gauge.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention as defined by the appended claims.

1000: Contaminated soil purification and oil recovery device using subcycle according to the present invention
10: Water tank
11: Screen filter
20: Pump
30: Storage tank
40: Distributing Transmitter
50: Pressure regulator
60: preheater
70: Reactor
71: soil container
72: soil filter
73: Drying valve
74: Cooling coil
75: cooling means
76: Cooling fan
80: tube particle remover
81: Intrusion free entrance
82: tube particle filter
90: Heat exchanger
100: Flow rate regulator
110: density separator
120: Oil collecting tank
130: Exhaust control valve
140: Collection tube
150: thermos
151: Electric heater
152: first temperature sensor
153: second temperature sensor
160: Pressure gauge

Claims

A water tank (10) in which water is stored;
A pump 20 for pressurizing the water transferred from the water tub 10;
A storage tank (30) for storing the water transferred from the pump (20);
A distributor / distributor 40 for distributing and transferring the water transferred from the storage tank 30 to the water tank 10 and the pressure regulator 50;
A pressure regulator 50 for pressurizing or depressurizing the water transferred from the distributor / transporter 40 to a subcritical pressure condition;
A preheater (60) for heating the water transferred from the pressure regulator (50) to a temperature condition of a subcritical state to generate a subcritical coefficient;
A reactor (70) for passing the submerged coefficient transferred from the preheater (60) through the contaminated soil loaded therein to dissolve contaminants contained in the contaminated soil into the submerged coefficient;
A tube particle remover 80 for filtering particles, floating matters, and impurities of contaminants included in the submixture transferred from the reactor 70;
A heat exchanger (90) for cooling the subcritical water transferred from the tube particle remover (80) to generate water at room temperature;
A flow rate controller 100 that adjusts the flow rate of the water at room temperature sent from the heat exchanger 90 to a constant value; And
And a density separator 110 for separating the water at room temperature transferred from the flow rate regulator 100 by density difference to discharge the oil to the oil collecting tank 120 and discharge the water at room temperature to the water tank 10 (1000). &Lt; RTI ID = 0.0 > (1000) < / RTI >

The process according to claim 1, wherein the reactor (70)
(1000). The apparatus for collecting and purifying contaminated soil according to claim 11, wherein the plurality of the pollutants are disposed in parallel in a row.

The process according to claim 1, wherein the reactor (70)
A soil container 71 installed in the reactor 70 and loaded with contaminated soil so that the contaminated soil loaded on the soil container 71 is not discharged to the preheater 60 and the heat exchanger 90; And a soil filter (72) surrounding a predetermined portion of the soil container (71)
Wherein the soil container (71) is detachably installed in the reactor (70).

The process according to claim 1, wherein the reactor (70)
Further comprising a drying valve (73) communicating with an upper end of the reactor (70) and discharging the steam generated by the submerged coefficient to the contaminated soil so that the contaminated soil is dried, Soil remediation and oil recovery apparatus (1000).

The contaminated soil purification and oil recovery apparatus (1000) according to claim 2, wherein the contaminated soil purification and oil recovery apparatus
A plurality of exhaust control valves 130 for regulating the amount of feed of the submerged feeds respectively transferred from the plurality of reactors 70 to the tube particle remover 80; And
And a collecting pipe (140) collecting the aseism coefficients transferred from the plurality of discharge control valves (130) and transferring them to the tube particle remover (80). Device (1000).

The apparatus of claim 1, wherein the tube particle remover (80)
A penetration-free inlet 81 for introducing a submerged coefficient transferred from the reactor 70 into the tube-particle remover 80 inside the tube-particle remover 80; And a tubular particle filter (82) for filtering particles, floating matters, and impurities of the contaminants contained in the submergence coefficient in which the water level rises, are installed, respectively. .

The water treatment system according to claim 1, wherein the water tank (10)
And a screen filter (11) for filtering the contaminants contained in the water at room temperature transferred from the density separator (110) is installed inside the apparatus (1000).