KR20150107524A - System and Method Using Superheated Steam of Thermal Processing Technology for Soil Remediation and Purification - Google Patents

Abstract

The present invention relates to a soil purification system and method using overheated steam, which make oxygen-free high temperature steam cause pollutants of the soil to perform a reduction reaction using the low pressure and ultra-high temperature overheated steam, and dissolve organic materials or desorb the organic materials into gaseous materials or transform the organic materials in a gas phase, and in the case that a volatile material or a pseudo-volatile material is contained, cause thermal desorption for rapidly separating the pollutants from the soil. The present invention relates to a soil purification system and a soil purification method using a thermal treatment technology of overheated steam, which provides a structure of selectively using an auger rod injection device and a vibratory plowing porous pipe injection device according to the kind of attachment for injecting the overheated steam in order to enhance a treatment efficiency and a treatment amount according to concentration of polluted soil, so it increases the kind of pollutants to be treated, widens a concentration applying range, enhances a pollutant separation efficiency in the soil using the steam, and reduces an amount of an exhaust gas after reaction with the overheated steam.

Description

FIELD OF THE INVENTION The present invention relates to a method and apparatus for treating soil,

The present invention relates to a soil remediation system and a soil remediation method using a thermal treatment technique of superheated steam. More specifically, the present invention relates to a system and method for soil remediation using a superheated steam of low pressure and high temperature, It decomposes organic substances or converts organic substances into gaseous materials by desorption or gaseous form, and thermal desorption occurs when volatile substances or quasi-volatile substances are contained, and superheated steam which separates soil and pollutants in a short period of time To a soil purification system and method using the same.

Recently, the use of thermal treatment technology has been applied to soil contamination that is difficult to clean, including high concentrations of pollutants (oil, low volatile organic compounds, volatile heavy metals (Cd, Pb, As, Hg, Se) There is an increasing tendency to use the technique of desorbing the pollutants and treating them with gasified pollutants.

The thermal treatment is divided into two types of heat treatment: incineration heat treatment by direct burning and pyrolytic heat treatment in which organic material is decomposed by applying heat in an oxygen-free anaerobic state. Again, the type of the thermal decomposition heat treatment is high temperature thermal Desorption 600 ~ 1000 ° C) and low temperature thermal desorption (400 ~ 600 ° C).

Generally, in the purification of oil and volatile organic compounds in soil purification, low-temperature thermal desorption technology considering economical efficiency is widely commercialized.

The low-temperature thermal desorption technique indirectly transfers heat by heating an outer wall of a rotary kiln (indirect-contact or indirect-fired), and is intended for high-density heavy oil of contaminated soil. This is a low-cost purification technology as compared with the direct heating method, but has a disadvantage in that it is complicated for purification facilities and processes.

In addition, Direct-contact or direct fired is a method of burning contaminated soil and burning it directly in a rotary kiln. Depending on the pollutant type, it is heated to about 600 ~ 1000 ℃ and the generated gas is adsorbed by activated carbon Oxidation catalyst or the like. However, the direct heat transfer method has a disadvantage that the purification facilities are complicated, the installation production cost and purification operation cost are high, and the competitiveness in the soil market in China or Southeast Asia is low.

In addition, the problems of the conventional method of cleaning the contaminated soil using the thermal treatment technique include the problem of using a rotary type kiln which is a fixed type, a complicated purification system, and a closed type or a controlled type.

KR Patent Publication B1 10-0872379 (Dec. 01, 2008)

In order to solve the above problems, an object of the present invention is to provide a method and apparatus for decomposing an organic material by causing an oxygen-free high-temperature steam to react with a contaminant of a soil using a superheated steam at a low- Desorbed or converted to a gaseous form to provide thermal desorption when volatiles or quasi-volatile materials are included and to provide rapid separation of soil and contaminants.

For another purpose of the present invention, a general thermal desorption technique is used in which a contaminated soil in a rotary kiln is heated by a thermal oxidation reactor in a dropping manner, while a time The larger the thermal degassing radius of influence, the more the entire soil cell to be treated acts as a single reactor.

Another object of the present invention is to provide a method and a device for producing an airtight container that uses a dedicated attachment and horizontally installed a porous pipe while horizontally generating a passageway at a predetermined depth, And a water film layer is formed at a temperature difference to control the superheated steam retention time and to control the reaction time by the compaction plate.

At this time, superheated steam or gas is injected through the porous pipe inserted at a certain depth of the vibration plow, and the pipe caused by the blade, which is a vibration plow, moves, and a passage is formed parallel to the ground surface at a certain depth. And by the vibration, it reacts slowly rising upward.

Another object of the present invention is to selectively control the frequency and the porous pipe length according to the permeability and the saturation of the soil.

In order to solve the above-mentioned problems, the present invention provides a soil purification method using a thermal treatment technique of superheated steam, a soil sorting and crushing work step for removing foreign matter in a contaminated soil subjected to a field pretreatment and a mechanical pre- A saturated steam process step of a thermal pretreatment process which serves to enlarge the soil temperature scale (concentration) surface in the radius of influence and accelerate the desorption effect to make optimum desorption and volatilization conditions, A superheated steam process step of decomposing and separating pollutants and organic substances in the soil under a reducing reaction by a steam reaction or a desorption process in which the contaminants gasified in the soil pores by the temperature scale of the superheated steam process are separated by a strong intake device And a post-treatment step of sucking in the soil It discloses.

In addition, the soil screening and crushing step of the present invention includes a step of selecting excavated soil particles of 20 to 30 mm or less, a step of crushing and mixing the contaminated soil before applying the heat exfoliation technique to homogenize the contaminant concentration, The crushing operation step is performed on a roughed soil having an average depth of 50 cm or more and 1 to 1.5 m or less. The saturated steam processing step is performed by injecting saturated steam within a temperature range of 100 to 150 degrees before injecting the superheated steam at a high temperature It is characterized by lowering the viscosity and the vapor pressure of the contaminants while controlling the proper moisture content within 17 ~ 30% to weaken the adsorption power of contaminants.

In the superheated steam process step of the present invention, the superheated steam having a temperature of about 200 to 600 ° C is injected at a rate of 0.3 to 0.7 MPa (megapascal) or less to adjust the moisture content to 7 to 10% or less. In the superheated steam process step Is an ultra-high-pressure, low-pressure, high-temperature steam in the anaerobic state to decompose organic substances under the reducing reaction with soil contaminants, or the organic substances are converted into desorbed or gaseous materials as gaseous substances, and when they contain volatile substances or quasi-volatile substances And separating the soil and contaminants in a short period of time by inducing desorption.

In addition, the post-treatment step of the present invention increases the pollutants in the lower part of the soil toward the ground and contacts with the atmosphere on the surface layer to form a water film layer, delaying the superficial steam retention time, The vapor is first sucked and treated at the intake port installed in the steam injection attachment, and the volatile gas generated as the soil temperature is continuously concentrated is removed from the adsorption facility, which is the secondary collection device, .

Also, in the soil remediation system used in the soil remediation method using the thermal treatment technique of the superheated steam of the present invention, in the soil remediation system, the excavator has a dedicated pouring means, which is different in depth, width, A soil remediation system comprising any one of an infusion device or an auger rod infusion device.

In order to solve the above-mentioned problems, in the vibrating plow porous pipe injecting apparatus of the present invention, a horizontal porous pipe is installed horizontally at a predetermined depth, and superheated steam is sprayed with a vibration through a porous pipe, And the reaction time of the compaction plate is controlled by controlling the superheated steam retention time and controlling the reaction time of the compaction plate. The vibrating plow porous pipe injecting apparatus is characterized in that the vibrating plow porous pipe injecting apparatus has a constant depth Superheated steam or gas is injected through the inserted porous pipe and a pipe is moved by the vibration plow, a long passage is generated parallel to the ground surface at a certain depth, and steam or gas moves rapidly along the passage, It reacts slowly and provides a response, and depends on the permeability and saturation of the soil. Selectively adjusting the frequency and length of the porous pipe and is characterized in that use is possible.

The vibration plow porous pipe injection device of the present invention comprises a plow coupling part linked with the excavator, a vibration device installed as a vibration motor on the upper side, and a vibrating part installed on the lower compaction part, A compaction plate for condensing the ground clearance by inserting and pulling of the plow or the saturated or superheated steam injected from the porous pipe in the ground to react with contaminants, A pouring unit installed at the bottom of the excavator so as to be detachable by a vibrating plow and a chemical injection pipe installed at the rear of the vibrating plow and installed in the form of a triangle to minimize the clearance of soil when towed, The superheated steam is injected by the passage, and the steam is sprayed in a horizontal form parallel to the ground surface A planarization device installed at the rear of a porous vibration pipe and a vibration plow and planarizing the surface by a diaphragm, a gas collecting device collecting volatile contaminants and vapor reacting at the initial stage of superheated steam injection, and volatile pollutants such as volatile gas and vapor And a gas inlet for injecting a catalytic gas or a chemical to induce a reduction reaction of the superheated steam, wherein the compaction plate is raised upward Wherein the pneumatic compaction unit is a vibratory compaction unit for forming a water film layer on the ground contacting the atmosphere and delaying the residence time in the ground of the superheated steam or increasing the reaction time. Can be selectively attached and detached up to 3 to 5 rows, Is the easy yirueojim aspect, the drug injection tube is characterized by consisting of a second non-corrosive to the medium-twos heat resistance and excellent acid resistance minimize the heat loss of high temperature super heated steam and the oxidizing gas and the liquid material.

The present invention also provides a soil purification system characterized in that the porous vibration pipe has a spray hole at a constant interval, has heat resistance and acid resistance in the form of a flexible pipe, and is a specially designed porous pipe and has excellent durability when towed .

Further, the auger rod injecting device constituted by the excavator of the present invention includes an auger coupling unit for linking with the excavator, a power motor device for controlling low / high speed rotation and power from the upper side, A tether device for controlling the tension of the auger rod and a rotating chain of the auger rod, an upper rod connecting portion connected to the auger rod so as to insert the auger into the ground, and auger connected to the auger rod, A lower rod connection portion for use in injecting a vapor or a gas mixture at a lower portion of the upper rod connection portion, a chemical injection pipe connected to the upper rod connection portion by a pipe for injecting a medicine, The catalytic agent is injected in the gas phase or the liquid phase in the auxiliary part at the lower part of the upper rod connection part On the day before the inspection, a spraying blade attached to the lower part of the auger under the form of a crushing blade and a mixing blade to form soil pores while rotating the auger, a chemical spraying port for spraying the chemical in the gas- And a drill bit coupled in a shape according to the ground condition through a bit connection part under the auger rod, wherein the auger rod is capable of selectively detaching 2 to 4 columns and connecting the auger of each depth And is capable of injecting and mixing a predetermined amount of medicines and vapors by controlling an appropriate pressure and a flow rate to a desired depth of contamination.

In addition, the high temperature superheated steam is injected through either the vibration plow of the vibrating plow porous pipe injector of the present invention or the auger of the auger load injector to raise the lower pollutant toward the ground, So that the pollutants and the vapors volatilized in the surface layer are first sucked and treated at the intake port provided in the attachment of the injection device, and the temperature of the soil is continuously And the volatile gas generated by the concentration is removed from the adsorption facility of the second collecting device, thereby reducing the amount of pollutant to below the environmental standard value of the pollutant.

The present invention provides a soil remediation system and a soil remediation method using a thermal treatment technique of superheated steam, and it is an object of the present invention to provide a soil remediation system and a soil remediation method using a superheated steam, It is effective to increase the degassing efficiency of contaminants in a short period of time due to the existing heat scale while injecting steam.

Further, the advantages of the present invention are that there are many types of pollutants, a wide application range of concentration, a high efficiency of separating contaminants from the soil by using water vapor, and a small amount of generated exhaust gas after superheated steam reaction.

In addition, the present invention regulates the pressure of the superheated steam to 0.3MPa or less in order to prevent a channeling phenomenon occurring only in a soil pore and a permeable property by a pressure at a high pressure, The temperature and the flow rate can be selectively controlled, and the efficiency of the pollution purification can be improved by using the special injection means utilizing the attachment structure capable of uniformly reacting the superheated steam.

Therefore, it is an object of the present invention to provide a process for treating a substance to be treated in a wide range, capable of elastic treatment of pollutant types and concentrations, facilitating effective control of reaction factors according to pollutants and concentration of pollutants, And provides an effect of ensuring purification quality.

1 is a flow chart of a soil remediation method using a thermal treatment technique of superheated steam according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a method of treating soil,
3 is a block diagram showing a configuration of a vibrating pneumatic porous pipe injecting apparatus according to an embodiment of the present invention.
4 is a schematic view of a vibrating plow porous pipe injecting apparatus according to an embodiment of the present invention.
FIG. 5 is a use state showing the entire operation of a vibrating plow porous pipe injecting apparatus according to an embodiment of the present invention. FIG.
FIG. 6 is a view showing a main part operation of a vibrating plow porous pipe injecting apparatus according to an embodiment of the present invention. FIG.
7 is a schematic view showing the configuration of a top surface of an auger injection device according to an embodiment of the present invention.
8 is a schematic diagram showing a side view of an auger injection device according to an embodiment of the present invention.
9 is a view showing an example of a temperature influence radius obtained by scaling the temperature of an auger injection device according to an embodiment of the present invention.

Hereinafter, embodiments of the soil remediation system and the soil remediation method using the thermal treatment technique of superheated steam according to the present invention will be described with reference to the accompanying drawings.

The feature of the present invention is to increase the permeability of the soil by inserting an attachment device means designed for exclusive use of superheated steam into the tarnished soil rather than the thermal desorption method using a closed rotary kiln used in general thermal desorption technology.

Terms such as desorption, deaerator, and stripping used in the present invention are intended to refer to the removal of contaminants from an overall action to remove contaminants from the soil of the present invention, It is a term used in a similar way.

1 is a flowchart of a soil remediation method using a thermal treatment technique of superheated steam according to an embodiment of the present invention.

As shown in the figure, the soil remediation system and the soil remediation method using the thermal treatment technique of the superheated steam include the step of sorting and crushing the soil (S100) through the soil with the height of 1m ~ 1.5m and the mechanical pre- A saturated steam process step S200 of a thermal pretreatment process in which steam is injected to enlarge the soil temperature scale (concentration) surface at an inherent influence radius; Then, by using superheated steam (300 ~ 800 ℃) of low pressure ultra-high temperature, high temperature steam in anoxic condition is decomposed with soil pollutants and organic substances are decomposed or organic substances are converted into desorption or gaseous state as gaseous substances, (S300) where the thermal desorption occurs when the material or the quasi-volatile material is contained, and the rapid separation of the soil and the contaminants occurs; And a post-treatment process step (S400) of sucking contaminants continuously volatilized through the soil flushing periodically by the intensively gasified pollutants continuously gaseousized in the soil pore at the soil temperature scale.

To explain this, the soil sorting and crushing operation step (S100) As a process of desorbing and stripping contaminants in the soil, the temperature of the soil through the superheated steam of the present invention is elevated, and the heat in the soil is accumulated so that the effect of continuous volatilization and desorption of the contaminants can be efficiently performed .

Therefore, the step of sorting and crushing the soil (S100) may include a step of selecting excavated soil to a size of 20 to 30 mm or less by using a crusher and a screening equipment to remove foreign matter in the contaminated soil, And homogenizing the contamination concentration by crushing and mixing before application of the technique.

The soil sorting and crushing operation step (S100) of the present invention has a more effective purging form for a soiled soil having an average depth of 50 cm or more and 1 to 1.5 m or less. At this time, the soil temperature may vary according to the field condition. However, it is one of the effects of the present invention that it takes several days until the temperature of the heated soil is lowered to the normal temperature unexpectedly, The deaeration effect of contaminants in a short time is increased due to the existing heat scale.

The saturated steam process step (S200) is a step of thermal pretreatment in which the porosity of the contaminated soil is increased and the moisture concentration is controlled within 17 ~ 30%.

In general, the thermal desorption process may be preceded by the addition of a drying process to regulate moisture to 20% or less. In the saturated steam process step of the thermal pretreatment process of the present invention, It is a process that injects saturated steam within ~ 150 ° C to control the proper moisture content, while lowering the viscosity and the vapor pressure of contaminants to weaken the adsorption power of contaminants.

The saturation vapor temperature is within 150 degrees and the moisture content is controlled within the range of 17 to 30% moisture.

The saturated steam process step (S200) promotes the desorption effect as much as possible during the saturated steam reaction, thereby providing optimum desorption and volatilization conditions.

The saturated steam in the saturated steam processing step (S200) is liquefied in contact with the soil having a low temperature and can not decompose volatile organic compounds (VOCs) because it does not operate by a reducing action, but plays a role of dissolution or desorption.

Therefore, the saturated steam process step (S200) is primarily to control moisture such as dissolution / desorption and volatilization. This is a pretreatment process of heat peeling by controlling desorption of contaminants and decreasing viscosity by adjusting the moisture content to 17 ~ 30% while maintaining the steam temperature at 150 ° C to induce desorption of contaminants.

The advantage of saturated steam is that it is 6 to 10 times higher in calories and volatility than high temperature air and is applied as a preliminary step to smooth steam stripping so that when a high temperature superheated steam is reacted for a long time, The pollutant material is strongly adsorbed to the soil to prevent deterioration of purification efficiency.

In the superheated steam process step (S300), the radius of influence of the reaction by the superheated steam of the reducing action inherent thereto is made to have the radius of influence of the reaction, and as the time passes, the entire soil cell becomes a superheat It is a steam reaction process. Therefore, the general thermal detachment is different from the way in which the contaminated soil in a rotary kiln (kiln) proceeds by a thermal oxidation reactor in a falling mode.

In addition, the superheated steam process step (S300) is a technique for desorbing and separating low-volatile contaminants depending on the types of contaminants, such as soil temperature scale and superheated steam temperature and flow rate, while desorbing and collecting contaminants.

The temperature of the superheated steam is 300 to 600 degrees Celsius and the moisture content of the soil is controlled within 7 to 10 percent. The reaction time is about 15 hours, but the superheated steam is about 0.3 to 0.7 MPa (3 to 7.138 kgf / cm2) Lt; 0 > C is preferred.

The superheated steam exhibits its characteristics when it is 170 DEG C or higher. The characteristic is the reducing action. When the superheated steam is brought into contact with volatile organic compounds (VOCs), the VOCs are reduced and decomposed. For example, in dichloromethane, the carbon double bond carbon-hydrogen bond and the carbon-chlorine bond are broken by the reducing action of the superheated vapor, and are separated from each atom.

The chlorine is hydrogen chloride and chlorine gas and is volatilized or reacted with metal components in the soil to be mineralized.

In addition, since superheated steam does not operate by oxidation, it does not oxidize each atom, but each atom is oxidized by the air contained in the soil to become a harmless gas such as carbon dioxide and water vapor.

Decomposition of volatile organic compounds (VOCs) can be effectively promoted by the reduction reaction of iron powder while supplying compressed air or water including iron powder and solidifying agent after the step of spraying superheated steam. At this time, iron is used as a promoter for the reduction reaction of volatile organic compounds (VOCs) which are contaminants. The solidifying agent stabilizes the ground by injecting a solidifying agent (cement stabilizer) and the like at a high pressure in the post treatment when the soil ground is weakened due to the superheated steam pressure.

In the superheated steam, the reaction is an anoxic condition and the pollutant is reduced. Therefore, unlike the combustion using oxygen, the generation of harmful gas is less. Generally, oxygen, carbon and chlorine are present at a temperature of about 300 ° C to 400 ° C. However, in an environment where there is a superheated steam at a temperature of about 170 ° C, carbon and chlorine are atoms Dioxins are not produced because they are oxidized as above in a state where they are present and cooled to a level below that. In order to maximize these characteristics, it was configured to inject catalyst gas or chemicals through the gas injection port.

Therefore, it is possible to effectively remove pollutants by using the reaction heat by adding the superheated steam in the reduced state and the reducing agent.

In addition, the temperature of the steam can be lowered to add the oxidation reaction material in a state including saturated steam and oxygen, and the contaminated soil can be heated by using the heat of oxidation reaction.

For soil contaminated with heavy metals, reducing / oxidizing agents can be injected with steam mixed with steam to promote more effective soil stabilization.

If the pressure is higher than 0.7 MPa in the in-situ application in the superheated steam process step (S300), the pressure can be selectively controlled because the soil is collapsed by the pressure and the soil strength is remarkably lowered ,

In the application of the Ex-Situ technology, the pressure is controlled to be within 0.3MPa because of the possibility of channeling phenomenon flowing only to the soil pore and permeability. It is effective to utilize an attachment having a structure capable of uniformly reacting by using the exclusive injection device means by selectively controlling the steam temperature and the flow rate.

The post-treatment process (S400) is a process of sucking the volatilized pollutants generated through the periodic soil flushing by the powerful intake device to the gasified pollutants continuously accumulated in the soil pore at the soil temperature scale.

This is because it does not burn gaseous material separated from soil and pollutants by heat, but treats it by adsorption of catalyst and activated carbon. It converts volatile substances generated by thermal reaction in paper into volatile or gasified state, It means to release to atmosphere after treatment by removal facility.

The gas collection in the post-treatment process step (S400) is performed by converting a volatile substance generated by a thermal reaction into a volatilized or gasified state in the paper, collecting it by a strong suction device, In the case of volatile pollutants, a closed facility is required to prevent the release of volatile pollutants to the atmosphere. In the case of reduction / oxidation / stabilization of heavy metal pollutants, a separate enclosed facility is not necessary.

FIG. 2 is an exemplary view showing a process of a soil remediation method using a thermal treatment technique of superheated steam according to an embodiment of the present invention.

As shown in the drawing, the high temperature superheated steam 206 is injected so that the lower pollutant 204 attached to the soil particles 205 rises toward the ground and a water film layer is formed in contact with the atmosphere on the surface layer, The pollutants and the oily water vapor 203 which are delayed in the residence time and volatilized to the surface layer are sucked and treated 202 at the inlet port provided at the attachment of the injection apparatus 202 and the volatile gas generated as the temperature of the soil is continuously concentrated It is possible to reduce the amount of the volatile pollutants to less than the environmental standard value of the pollutant by being removed from the second capture adsorption facility 201. However, in the case of volatile pollutants, ), But in the case of heavy metal pollutants, a separate secondary capture adsorption facility 201 may not be necessary.

A feature of the present invention is that a dedicated injection device means is used as a soil remediation method using a thermal treatment technique of superheated steam, in contrast to a heat transfer method in which a rotary kiln is used for rotary crushing.

In order to inject superheated steam, it is divided into vibration horizontal pipe injection type and auger type according to the type of attachment. It is used to selectively increase treatment efficiency and throughput depending on contaminated soil concentration.

The steam injector used in the special injector means differs depending on the influence radius and attachment such as the inherent soil depth and width. The attachment has an auger injection device and a vibration plow porous pipe injection device.

FIG. 3 is a structural view showing the construction of a vibrating pore porous pipe injecting apparatus according to an embodiment of the present invention, and FIG. 4 is a schematic view of a vibrating pore porous pipe injecting apparatus according to an embodiment of the present invention.

According to the embodiment, the vibrating plow porous pipe injector 300 includes a plow coupling unit 301, a vibration device 302, an anti-vibration device 303, a compaction plate 304, a plow unit 305, A porous vibration pipe 307, a leveling device 308, a gas collecting device 309, a pollutant intake port 310, and a gas inlet 311. [

The plow coupling unit 301 is a link to a dedicated superheated steam (steam) and a chemical feeder or a general excavator, and the construction machine standard may be different according to the specification and specification of the plow plow.

The vibrating device 302 is provided with a vibrating motor installed on the upper side of the vibrating plow porous pipe injecting device 300 to transmit vibrations to the compaction part, the plowing part, and the porous vibration pipe.

The vibration damping device 303 is configured to transmit vibrations of the vibration device 202 to the lower compaction part, the plow part, and the porous vibration pipe smoothly, and to prevent the vibration through the upper endless track boom from affecting the equipment It is installed with anti-vibration device of material or strength.

The compaction plate 304 consolidates the ground gap due to the plow insertion and traction, and the saturated or superheated steam injected from the porous pipe in the ground is reacted with the contaminant to rise to the top, And is a vibration compaction device for delaying the residence time in the ground of the superheated steam or prolonging the reaction time. Further, the compaction plate 304 has a compaction effect for adjusting the water vapor retention time of the saturation temperature layer.

The plow unit 305 is capable of selectively attaching and detaching three to five rows of saw-blade-type vibration plows so as to facilitate insertion of the ground, and facilitates insertion and traction by vibration. The porous vibration pipe may be horizontally installed at a predetermined depth in the lower part of the plow.

The pneumatic chemical injection pipe 306 is made of a material that is excellent in heat resistance and acid resistance and minimizes heat loss of superheated superheated steam and does not cause corrosion to the oxidizing gas and the liquid phase and the chemical injection pipe attached to the rear end of the plow It is installed in triangular shape to minimize soil clearance when towing.

The porous vibration pipe 307 has injection holes at regular intervals, has a heat pipe resistance of more than 1000 degrees in the form of a flexible pipe, and is a specially designed porous pipe, and has excellent durability when towed.

In addition, superheated steam is rapidly injected into the passage of the porous vibration pipe 307 installed at a certain depth and horizontally, and is injected in a horizontal form parallel to the ground surface, and the contact is homogeneously activated by the vibration.

The planarization device 308 is installed at the rear of the vibration plow attachment, and is a device for flattening the ground surface by a diaphragm.

The gas collecting device 309 is a device for collecting volatile contaminants and vapor reacted at the initial stage of superheated steam injection.

The pollutant intake port 310 is a facility for strongly sucking volatilized pollutants such as volatile gas and vapor to primarily treat the pollutants. Is discharged to the second large-scale collecting vinyl house facility through the adsorption equipment installed in the pollutant intake port 310, and secondly, it is purified through the activated carbon adsorption facility and discharged to the atmosphere.

Here, as the temperature of the soil due to the superheated steam accumulates, the gasified contaminants are collected by the large collecting device and released to the atmosphere after the adsorption by the final secondary air preventing facility.

The gas injection port 310 is a device for injecting a catalyst gas or a chemical to induce the reduction reaction of superheated steam.

FIG. 5 is a state view showing the entire operation of the vibrating pour porous pipe injecting apparatus according to the embodiment of the present invention, and FIG. 6 is a state view showing the main part of the vibrating pour porous pipe injecting apparatus according to the embodiment of the present invention.

5 and 6, the vibration plow porous pipe injector 300 is a device that can be used by selecting a vibration plow from columns 2 to 4, The apparatus is composed of a saturated / superheated steam generator 500 and a purge chemical feeder 600.

The saturated / superheated steam generator 500 may be used in combination with a conventional excavator such as an excavator (backhoe).

The vortex porosity porous pipe injector 300 is connected to an excavator (backhoe) to select an injection agent according to the type and concentration of the contaminated soil, calculate injection amount of the quantitative purification agent relative to the soil, and input, .

The superheated steam temperature may vary depending on the pollutant type, but it may be varied depending on the concentration of pollutants, and the steam within 200 to 500 ° C may be injected at a pressure of 0.3 to 2 kgf / cm 2 or less. Generally, Inject.

The reducing / oxidizing gas may be varied depending on the type of contamination and the type of contamination, but it is injected in the form of vapor and gas containing the appropriate reducing or oxidizing concentration.

At this time, superheated steam or gas is injected through a porous pipe inserted into a certain depth of the vibration plow coupled to the vibrating plow porous pipe injecting apparatus 300, and the pipe driven by the vibrating plow moves while being parallel to the ground surface And the steam or gas moves rapidly along the passage, and the superheated steam caused by the vibration slowly reacts to the upper part. Depending on the permeability and soil properties of the soil, the frequency and porous tubing length can be selectively adjusted.

Therefore, the present invention is characterized in that a horizontal porous pipe is installed horizontally at a predetermined depth, and a superheated steam is sprayed together with vibration through a porous pipe, It is a device to control the reaction time by the compaction board and to control the superheated steam retention time by forming a water film layer in the surface layer by the air layer and the temperature difference from the surface layer. Therefore, it is advantageous that a flexible vibration pipe is installed at a certain depth by a plow type vibration attachment to form a wide impact radius.

FIG. 7 is a schematic view showing the configuration of the upper surface of an auger injection device according to an embodiment of the present invention, and FIG. 8 is a schematic view showing a side surface of an auger injection device.

3, the auger rod injection device 400 includes a power motor device 401, an auger 402, a tension device 403, an auger device coupling part 404, an upper rod connection part 405, The rotary rotary joint 406, the lower rod connecting portion 407, the Auger drug injection tube 408, the previous day 409, the medicine injection hole 410, the injection rotary blade 411, and the drill bit 412 .

The power motor device 401 is a device capable of controlling low / high speed rotation and power by controlling the flow rate and pressure of the hydraulic pressure with a hydraulic pressure reduction motor.

The auger rod 402 is capable of selectively attaching and detaching the auger rows 2 to 4, and by connecting the auger to the depth, it is possible to inject and mix a predetermined amount of medicines by controlling the appropriate pressure and flow rate do.

The tension device 403 is a device for adjusting the tension of the rotating chain.

The auger equipment joining unit 404 is a link to be connected to a dedicated superheated steam (steam) and a medicine supply equipment or a general excavator, and a construction machine standard may be different according to auger load device specifications and specifications.

The upper rod connecting portion 405 can be used in various ways depending on application fields within a range of 25 to 80 mm in diameter and 1 to 15 m in length, and the auger rod is connected to an auger at the upper portion and inserted into the ground.

Liquid rotary joint 406 is a joint joint for injecting vapor of vapor or liquid phase while rotating the auger, and has heat resistance up to 1000 degrees.

The lower rod connecting portion 407 can be used in a total of 25 to 80 mm in diameter of the auger rod, and is generally used for injecting a vapor or a gas mixture.

The auger injection pipe (408) is a double structure, designed to have a heat resistant and acid resistant pipe, and is structured to have a strong resistance to the warming and corrosion of the steam.

The previous day 409 is a device for injecting the auxiliary rotary material and the catalyst in vapor or liquid phase.

The medicine injection opening 410 is a rotary injection opening for increasing the temperature radius into a hole for injecting the main purification chemicals into the vapor phase or the liquid phase.

The injection rotary blade 411 may be a rotary blade for injecting the cleaning agent while rotating the auger rod 402 when the superheated steam is injected, and may be changed to a crushing blade or a blended blade.

The drill bit 412 is a drill bit that is shaped in a conical shape, such as a sawtooth or the like, depending on the ground state, and is coupled through a bit connection portion. The shape of the bit can be different according to the ground condition.

In addition, the auger injection device 400 is a device that can be used in the second through fourth columns of the attachment, and the chemical supply device includes a saturated / superheated steam generator 500 and a purge chemical feeder 600 .

Select the injection chemicals according to the type and concentration of the polluted soil, calculate injection amount of the quantitative purification agent to the soil, and input, manual or control the injection, flow and pressure to the system.

The number of revolutions of the auger rod injecting apparatus 400 is 10 to 20 rpm and the descending speed is 3 to 5 cm per second, and it is possible to drill a depth of 1 to 10 m from the ground surface.

FIG. 9 is an exemplary view showing a temperature influence radius obtained by scaling the temperature of an auger injection device according to an embodiment of the present invention. FIG.

As shown in the figure, while the superheated steam of 600 degrees is injected, the purification is progressed while adjusting the radius of influence of superheated steam pressure, flow rate, and temperature in accordance with the boiling point of the pollutant gradually.

The object to be subjected to the pollution treatment of the present invention may be widely applied to oil pollutants (gasoline, gasoline, TCE, PCE, BTEX), volatile organic compounds (VOCs), heavy metal (chromium) have.

As the soil remediation method using the thermal treatment technique of the superheated steam of the present invention, the in-situ application technique applying the ground of the contaminated site without excavation and the ex-situ technique of purifying after the excavation Of course.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

300: Vibrating Plow Porous Piping System
301: plow coupling part 302: vibrating device
303: anti-vibration device 304: compaction plate
305: Plow part 306: Plow medicine injection pipe
307: Porous vibration piping 308: Planarizing device
309: Gas collection device 310: Contaminant intake port
311: gas inlet
400: auger rod injection device
401: power motor device 402: auger load
403: Tension device 404: Auger device coupling part
405: upper rod connection portion 406: gas / liquid rotary joint
407: Lower rod connection portion 408: Auger drug injection tube
409: The day before the inquiry 410: Drug nozzle
411: Injection rotary blade 412: Drill bit

Claims (18)

As a soil remediation method using thermal treatment technique of superheated steam
A soil sorting and shredding operation step (S100) for removing foreign matter in a contaminated soil that is subject to soil and mechanical pretreatment;
(S200) a thermal pretreatment process (S200) of injecting saturated steam to expand the soil temperature scale (concentration) surface at the specific impact radius and to promote the desorption effect to produce optimal desorption and volatilization conditions;
A step (S300) of superheating steam process for decomposing and separating contaminants and organic substances in the soil under a reducing reaction by a superheated steam reaction at a low-pressure super-high temperature after the saturated steam process step; And
And a post-treatment process step (S400) of sucking the contaminants gasified in the soil pore through the superheated steam process step by a powerful intake device by the soil temperature scale
Soil remediation method.
The method according to claim 1,
The soil selection and crushing operation step (S100) includes an excavation selection step of selecting soil particles of 20 to 30 mm or less, and a step of crushing and mixing the contaminated soil before applying the heat separation technique to homogenize the contamination concentration
Soil remediation method
The method according to claim 1,
The soil sorting and crushing operation step (S100) is characterized in that the soiled soil having an average depth of 50 cm or more and 1 to 1.5 m or less is targeted
Soil remediation method.
The method according to claim 1,
The saturated steam process step (S200) is performed by injecting saturated steam within a temperature range of 100 to 150 degrees prior to injecting the superheated steam at a high temperature to adjust the moisture content within 17 to 30%, lowering the viscosity and the vapor pressure of the pollutant, Characterized in that the adsorption force is weakened
Soil remediation method.
The method according to claim 1,
In the superheated steam process step S300, superheated steam having a temperature of about 0.3 to 0.7 MPa (megapascal) or less and about 200 to 600 ° C is injected to adjust the moisture content to 7 to 10%
Soil remediation method.
The method according to claim 1,
In the superheated steam process step (S300), the organic material is decomposed under reduced pressure and in an oxygen-free state and the high-temperature steam is contaminated with contaminants in the soil, or the organic material is desorbed as a gaseous material or converted into a gaseous phase, Characterized in that when volatile substances are contained, heat desorption is induced to rapidly separate the soil and the pollutants
Soil remediation method.
The method according to claim 1,
In the post-treatment process step (S400), the pollutants in the soil bottom rise to the ground and the surface layer is in contact with the atmosphere to form a water film layer, and the superficial steam retention time is delayed. It is characterized by the fact that the volatilized gas generated by the continuous intake and treatment of the inlet port of the steam injection attachment and the continuous temperature of the soil is removed from the adsorption facility of the secondary collection device, To
Soil remediation method.
A soil purification system for use in a soil purification method using a thermal treatment technique of superheated steam,
The excavator is constructed in such a way that the dedicated injection means includes either a vibrating plow porous tubing injector or an auger rod injector, depending on the specific soil depth, width and impact radius and attachment
Soil cleansing system.
9. The method of claim 8,
The vortex porosity porous pipe injector 300 is installed horizontally with a porous pipe and horizontally generates a passage at a predetermined depth. The superheated steam is sprayed with the vibration through the porous pipe, uniformly diffused to the upper part, To control the superheated steam retention time and to control the reaction time by the compaction plate
Soil cleansing system.
9. The method of claim 8,
The super-heated steam or gas is injected through the porous pipe inserted at a certain depth of the vibration plow, and the pipe is moved by the vibration plow, and a passage is formed parallel to the ground surface at a predetermined depth It can be used to control the frequency and porous pipe length according to the permeability and the saturation of the soil and to provide the reaction that the steam or gas moves rapidly along the passage and slowly rising to the top by the vibration. To
Soil purification system
9. The method of claim 8,
The vibration plow porous pipe injection apparatus 300 configured in the excavator includes:
A plow joining portion (301) linked with the excavator;
A vibrating device 302 installed as a vibration motor on the upper side;
An anti-vibration device 303 installed to transmit the vibration of the vibration device 302 to the lower compaction part, the plow part, and the porous vibration pipe;
A compaction plate 304 for consolidating the ground clearance due to the insertion and pulling of the plow or for replenishing the saturated or superheated steam injected from the porous pipe in the ground to react with contaminants;
A plow 305 detachably installed at the bottom of the excavator by a vibrating plow;
A plow medicine injection pipe 306 installed at the rear of the vibration plow and installed in the form of a triangle to minimize the clearance at the time of pulling;
A porous vibration pipe (307) horizontally installed on the ground at the rear of the vibration plow, for injecting superheated steam by a passage to spray steam in a horizontal shape parallel to the ground surface;
A planarization device 308 installed at the rear of the vibrating plow and planarizing the ground surface by a vibration plate;
A gas collecting device 309 for collecting volatile contaminants and vapor reacted at the initial stage of superheated steam injection;
A pollutant intake port 310 for sucking and primarily treating volatilized pollutants such as volatile gases and vapor;
And a gas inlet 311 for injecting a catalyst gas or a chemical to induce a reduction reaction of the superheated steam
Soil cleansing system.
12. The method of claim 11,
The compaction plate 304 is a vibrating compaction apparatus for forming a water film layer on the ground contacting the atmosphere while rising upward and lengthening the residence time in the ground of the superheated steam or lengthening the reaction time
Soil cleansing system.
12. The method of claim 11,
The plow unit 305 is capable of selectively attaching and detaching three to five rows of saw-blade-type vibration plows to facilitate insertion of the ground, and is easily inserted and pulled by vibration
Soil cleansing system.
12. The method of claim 11,
The pneumo-chemical injection pipe 306 is a double-walled structure, which is excellent in heat resistance and acid resistance, is made of a material that minimizes heat loss of superheated superheated steam, and is free from oxidation gas and liquid phase corrosion.
Soil cleansing system.
12. The method of claim 11,
The porous vibration pipe 307 has a spray hole at regular intervals, has heat resistance and acid resistance in the form of a flexible pipe, and is a specially designed porous pipe, which is excellent in durability when towed
Soil cleansing system.
9. The method of claim 8,
The auger rod injection device 400 constituted in the excavator
An auger equipment engaging portion 404 for linking with the excavator;
A power motor device 401 for adjusting low / high speed rotation and power from the upper side;
An auger rod 402 for connecting the power of the power motor device,
A tension device 403 for adjusting the tension of the rotary chain of the auger rod,
An upper rod connecting portion 405 connected to the auger rod and connected to insert auger into the ground,
A gas / liquid rotary joint 406 for connecting the auger connected to the auger rod so as to inject vapor or liquid vapor while rotating;
A lower rod connecting portion 407 for use in injecting a vapor or a gas mixture at a lower portion of the upper rod connecting portion 405,
An auger injection pipe 408 connected to the upper rod connection part 405 by piping to inject the medicines,
409 and 409 for injecting the catalyst into the gas phase or the liquid phase in an auxiliary manner from the lower part of the upper rod connection part 405,
An injection rotary blade 411 attached to the lower part of the auger rod in the form of a crushing blade and a mixing blade to generate a soil pore while the auger rotates;
A chemical injection port 410 for injecting the chemical in the gas phase or the liquid phase in the injection rotary blade 411,
And a drill bit (412) coupled in a shape according to the ground condition through a bit connection part under the auger rod
Soil cleansing system.
17. The method of claim 16,
The auger rod 402 is capable of selectively attaching and detaching 2 to 4 rows and connecting the auger load 402 to each depth to adjust the pressure and the flow rate of the chemicals and the steam to the desired depth of contamination, Characterized in that it is a device
Soil cleansing system.
9. The method of claim 8,
The high temperature superheated steam is injected through one of the vibration plow unit 305 of the vibrating plow porous pipe injector 300 or the auger rod 402 of the auger load injecting unit 400, So that the superficial steam retention time of the superheated steam is delayed, and the pollutants and vaporized in the surface layer are primarily sucked and treated at the intake port provided in the attachment of the injection apparatus , And the volatile gas generated by the continuous concentration of the soil temperature is removed from the adsorption facility of the second collecting device, so that it can be reduced to less than the environmental standard value per pollutant
Soil cleansing system.

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