KR102525148B1 - Heating treatment system for contaiminated soil - Google Patents

Abstract

The present invention relates to a heat treatment system for contaminated soil using a heat pipe, which comprises: a heat pipe which is pipe-shaped, is buried in the ground, forms a closed space to form a plurality of inlets, and has a heat wire embedded therein; an oil treating unit which comprises an oil liquid discharging pipe extended to a lower part of the heat pipe to discharge oil liquid settled in the lower part of the heat pipe, and an oil separating device receiving the oil liquid from the oil liquid discharging pipe to separate oil; and a gas processing unit which comprises a gas emitting pipe extended from an upper part of the heat pipe and emitting a reaction gas introduced to the inside of the heat pipe to the outside, and a combusting device receiving the reaction gas from the gas emitting pipe to combust the same. The system of the present invention enables heat treatment of contaminated soil by the heat pipe and introduces oil liquid and reaction gas as a resultant of the heat treatment for treatment, thereby enabling the simplification of devices and efficiency.

Description

Contaminated soil heat treatment system {HEATING TREATMENT SYSTEM FOR CONTAIMINATED SOIL}

The present invention relates to a system in which purification is performed by thermal desorption by a heat pipe inserted into contaminated soil, and at the same time, emulsion and reaction gas are extracted and treated as a purification result.

Recently, the importance of the soil environment affected by development projects has emerged as the seriousness of soil and groundwater contamination has increased due to wastes and hazardous chemicals generated by population growth and industrial development worldwide.

In particular, with continuous economic development and improved income levels, the amount of oil used due to the supply of automobiles has increased significantly along with industrial activities. Accordingly, the problem of soil and groundwater contamination due to the leakage of oil and hazardous chemicals classified as non-aqueous phase liquids (NAPLs) from oil storage tanks at gas stations and underground storage tanks of industrial facilities that store chemicals is emerging.

Accordingly, technologies for purifying various contaminated soils have been proposed, and Korean Patent Registration No. 10-925292 has been suggested as prior literature.

The technique includes an injection well buried in an oil-contaminated soil layer and injecting air into the soil layer; an air injector connected to the inlet of the injection well to supply air to the injection well; an air heater installed between the air injector and the injection well to heat air flowing into the injection well; An extraction well for extracting the oil contaminants volatilized by high-temperature air buried in the soil layer and injected to the outside; It relates to an apparatus for purifying oil-contaminated soil, characterized in that it comprises an air discharger connected to the outlet of the extraction well to discharge oil contaminants.

However, in the case of the above technology, there is a problem such as the hassle of separately installing the injection well and the extraction well.

Republic of Korea Patent Registration No. 10-925292

The present invention has been made to solve the above problems, and the contaminated soil is purified by thermal desorption by a heat pipe inserted into the contaminated soil. It is intended to provide a system that can be operated efficiently by simplifying.

As a means for solving the above-mentioned problems, the contaminated soil heat treatment system of the present invention (hereinafter referred to as the "system of the present invention") is buried in the ground in a tubular shape, forms a closed space, forms a plurality of inlet holes, and has a heating wire. heat pipe; an oil separation unit including a fluid discharge pipe extending to the lower end of the heat pipe and discharging the fluid deposited on the lower part of the heat pipe, and an oil separation device receiving the fluid from the fluid discharge pipe and separating oil; A gas processing unit including a gas discharge pipe extending to the upper end of the heat pipe and discharging the reaction gas introduced into the heat pipe to the outside, and a combustion device receiving and burning the reaction gas from the gas discharge pipe. .

As an example, the gas discharge pipe is configured to communicate with a collection space formed by a collection partition partitioning the inside of the heat pipe at an upper end of the heat pipe.

As an example, the heat pipe has a double pipe structure of an exterior and an inner tube, and an exterior inlet hole and an inner tube inlet hole facing each other are formed, a heat wire is embedded between the exterior and the inner tube, and a mesh network is formed in the exterior inlet hole. do.

As an example, an inlet control device is mounted on the inlet hole, and the inflow control device is tubular, with one side open, a mesh network formed on the other side, and a blocked side, so that the inlet control device is mounted on the inlet hole. It is characterized in that a mesh network is formed in the exterior inlet hole and a blocked surface is formed between the exterior and the inner tube.

As an example, the blocked surface is characterized in that a heat shield mounting plate is configured such that attachment parts are formed at both ends of the blocked surface with an elastic material, and a gap between the attached parts and the blocked surface is formed to form a heat shield space.

As an example, a filter medium layer is formed at the lower end of the collecting space to filter foreign substances while passing the reaction gas and to have a through hole through which the fluid discharge pipe passes.

As an example, at the location where the through hole is formed, a second through hole through which the latex discharge pipe passes through the central portion opposite to the through hole, and a condensed water droplet in the latex discharge pipe so that the cross section is formed in a concave shape in connection with the second through hole It is characterized in that a condensed water storage device composed of a rim concave to store the condensed water is included.

As an example, at the location where the through hole is formed, a receiving housing having a container shape with one side open and a through hole through which the fluid discharge pipe passes through the central portion opposite to the through hole is formed, and is mounted on the receiving housing and is condensed in the fluid discharge pipe. It is characterized in that a condensed water inlet composed of an absorbing member for absorbing water droplets is included.

As described above, the system of the present invention has the advantage of simplifying and improving the efficiency of the device by allowing the heat pipe to heat the contaminated soil and simultaneously introduce the latex and the reaction gas as a result of the heat treatment.

1 is a schematic diagram showing the system of the present invention;
2 is a partial view of a heat pipe as one configuration of the present invention;
3 is a view showing another embodiment of the inlet control tool shown in FIG. 2;
4 is an operating state diagram of the present invention,
5 is a partial view showing one embodiment of the present invention,
6 is a partial view showing another embodiment of the present invention.

Hereinafter, the configuration and operation of the present invention will be described in more detail based on the accompanying drawings. In describing the present invention, the terms or words used in this specification and claims are based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her invention. should be interpreted as a meaning and concept that corresponds to the technical idea of

The system 1 of the present invention, as shown in FIG. 1, is buried in the ground in a tubular shape and forms a closed space while forming a plurality of inlet holes 22 and a heat pipe 2 in which a heat wire is embedded; A latex discharge pipe 31 extending to the lower end of the heat pipe 2 and discharging the emulsion deposited at the lower end of the heat pipe 2, and an oil separation device 32 receiving the latex from the latex discharge pipe 31 and separating the oil content ) Oil treatment unit 3 including; A gas discharge pipe 41 extending to the upper end of the heat pipe 2 and discharging the reaction gas introduced into the heat pipe 2 to the outside, and a combustion device receiving and burning the reaction gas from the gas discharge pipe 41 ( 43) including a gas treatment unit 4; characterized in that it includes.

First, as shown in FIG. 1, the heat pipe 2 is buried in the ground in a tubular shape and forms a closed space while forming a plurality of inlet holes 22 and having a heating wire 211 embedded therein to dissipate heat into the contaminated soil. In addition to enabling heat treatment by applying the heat treatment, as a result of the heat treatment, the emulsion and the reaction gas are introduced into the inside, and contamination purification and extraction of the result by purification are possible by one configuration.

To explain this in more detail, the heat pipe 2 has a tubular shape buried in the ground and forms a closed space, the heat wire 211 inherent in the pipe 21, and the pipe 21 It is formed and consists of an inlet hole 22 through which fluid and reaction gas flow into the inside as a result of heat treatment of the contaminated soil.

As shown in FIG. 2, the pipe part 21 is formed in a double pipe structure of an outer pipe 21-2 and an inner pipe 21-1, and is internally formed in a spiral shape between the outer pipe 21-2 and the inner pipe 21-1. The hot wire 211 is configured so that the heat generated from the hot wire 211 is transferred to the contaminated soil through the exterior 21-2. In addition, the heat wire 211 is protected from external impact by the configuration of the exterior 21-2.

In addition, the outer inlet hole 22-2 and the inner pipe inlet hole 22-1 are formed in the outer pipe 21-2 and the inner pipe 21-1, respectively, so that the inlet hole 22 is formed in the pipe part 21 to be formed.

However, through the inlet hole 22 of the heat pipe 2, only the fluid and the reaction gas should be introduced, and the inflow of soil should be controlled. To this end, the exterior inlet hole 22-2 has a mesh network ( 212-1) is formed so that the inflow of soil is controlled by the mesh network 212-1.

More preferably, as shown in FIG. 2, the inflow control port 212 is mounted on the inlet hole 22, and one side of the inflow control port 212 is opened and a mesh network 212-1 is formed on the other side. and the side of the blocked surface 212-2 is formed so that the mesh network 212-1 is formed in the external inlet hole 22-2 by mounting the inlet control tool 212 to the inlet hole 22 The inflow of soil is controlled by the mesh network 212-1, and the inflow of the emulsion between the outer pipe 21-2 and the inner pipe 21-1 is controlled by the clogged surface 212-2 will be.

In addition to this, as shown in FIG. 3, an example in which a heat shield mounting plate 212-3 is further configured in the inflow control port 212 is presented, and the heat shield mounting plate 212-3 is made of an elastic material and has a closed surface. Attachment parts 212-31 are formed at both ends of 212-2, and a gap is formed between the attachment part 212-31 and the attachment part 212-31 to the blocked surface 212-2, so that the heat shield space ( 212-32) is characterized in that it is formed.

That is, although not shown in the drawing, the heat shield mounting plate 212-3 has a tubular shape so that the attachment parts 212-31 at both ends are attached to the blocked surface 212-2, and the attachment parts 212-31 ) Between the stomach portion is formed so that the shielding space 212-32 is formed between the blocked surface 212-2. In this way, the heat shielding space 212-32 is formed so that when the inlet control port 212 is attached to the inlet hole 22, it can be easily installed by an elastic fitting method and can be easily attached and detached even in the case of detachment. will be.

In addition to this, a heat shielding space 212-32 is formed between the outer inlet hole 22-2 and the inner tube inlet hole 22-1 so that the heat generated from the hot wire 211 passes through the inner tube inlet hole 22-1. It is to control the inflow through the inside to increase the efficiency.

In the pipe part 21, it is appropriate that the inlet hole 22 is preferably not formed at the upper end so that the reaction gas collected inside does not flow back to the outside.

In addition, in the case of the heating wire 221 in the pipe part 21, it is not embedded in the upper part. Although the drawing number is not shown, the heating part in which the heating wire 221 is embedded and the heating wire 221 are not embedded in the upper part of the heating unit. It is reasonable to consist of an unheated part.

That is, the heating wire 221 is internal only to the heating part, and only the heating wire 221 is included in the non-heating part to electrically connect to an external power source, so that heat is generated only in the heating part.

The reason for this configuration is that the heating part generates heat from the contaminated soil to induce thermal desorption of the contaminated soil, and the reaction gas generated during the thermal desorption process is collected at the upper end of the pipe part 21. The collected gas is a high-temperature gas, especially If the moisture content of the contaminated soil is high, it is a high-temperature and high-humidity gas, and when the high-temperature and high-humidity gas is discharged to the outside, there is a high risk of generating white smoke and the like. Therefore, in the present invention, the upper end of the pipe part 21 where the reaction gas is collected is configured as a non-heating part so that heat is dissipated from the high-temperature and high-humidity gas in the non-heating part.

The oil processing unit 3 extends to the lower end of the heat pipe 2 and receives the latex from the latex discharge pipe 31 for discharging the latex deposited at the lower end of the heat pipe 2 and the latex discharge pipe 31 to obtain oil. It is characterized in that it includes an oil separation device 32 for separating.

As shown in FIG. 4, the latex discharge pipe 31 sucks in the latex Q deposited at the bottom of the heat pipe 2 after being introduced into the heat pipe 2 and discharges it to the outside. It has not been done, but of course, the fluid (Q) is sucked by the operation of the pump.

The oil separation device 32 separates oil from the emulsion Q, and since various known technologies can be applied, a detailed description thereof will be omitted.

The gas processing unit 4 includes a gas discharge pipe 41 extending to the upper end of the heat pipe 2 and discharging the reaction gas introduced into the heat pipe 2 to the outside, and a reaction gas from the gas discharge pipe 41. It is characterized by comprising a condenser 42 for receiving and removing moisture and a combustion device 43 for receiving the reaction gas from which moisture is removed from the condenser 42 and heat-treating contaminants mixed in the reaction gas by heat treatment do.

The reaction gas introduced into the heat pipe 2 is collected at the upper part of the heat pipe 2, and the gas discharge pipe 41 extends only to the upper end of the heat pipe 2 so as to flow into the heat pipe 2 This is to discharge the reaction gas collected on the top of the heat pipe 2 to the outside. Of course, although the drawing number is not shown, the reaction gas (G) is sucked by the operation of the pump and discharged to the outside.

In addition, the gas discharge pipe 41 communicates with the collection space 61 formed by the collection partition wall 6 partitioning the inside of the heat pipe 2 at the upper end of the heat pipe 2, so that the collection space 61 ) It is reasonable to ensure that the collected reaction gas is easily discharged through the gas discharge pipe 41. The collection bulkhead 6 is configured in a shape in which the diameter narrows to the upper end through which the gas discharge pipe 41 communicates, so as to control the formation of dead zones.

Since various known technologies exist for the condenser 42 and the combustion device 43, a detailed description thereof will be omitted.

On the other hand, when a large amount of pollutants are mixed in the reaction gas, the condenser 42 as well as the combustion device 43 may be loaded by the inflow of the reaction gas. As shown in FIG. Similarly, an example in which the filter media layer 7 is further configured is shown.

This embodiment shows an example in which the filter medium layer 7 is configured at the lower end of the collecting space 61 in which a through hole 71 is formed to filter foreign substances while passing the reaction gas and allow the fluid discharge pipe 31 to pass through. there is.

As shown in the figure, the filter medium layer 7 is formed at the lower part of the collecting partition wall 6 to partition the inside of the heat pipe 2. As the reaction gas G passes through the filter medium layer 7, filtration is performed. This is to ensure that the reaction gas (G), which is primarily filtered in this way, is collected in the collection space (61).

With this configuration, the filter medium layer 7 is mounted integrally with the collecting partition wall 6 inside the heat pipe 2 so that it can be easily attached and detached.

In the case of the filter media layer 7, various known materials may be applied.

However, when the reaction gas collected in the collecting space 61 comes into contact with the fluid discharge pipe 31, the moisture mixed in the reaction gas G is condensed on the surface of the fluid discharge pipe 31 to form condensed water w, and this condensation The generation of water (w) lowers the absolute humidity from the reaction gas (G) so that problems such as white smoke generation are controlled. There is a problem in that the reaction gas (G) itself is not collected in the collection space 61 as it permeates into the pores and is blocked, so that the reaction gas G is re-exported through the inlet hole 22 located at the bottom.

Therefore, in this embodiment, a through hole 71 is formed in a container shape with one side opened, and a through pipe 811 through which the fluid discharge pipe 31 passes through the center portion opposite to the through hole 71 is formed. The condensed water inlet 8 composed of an accommodating housing 81 and an absorbing member 82 mounted on the accommodating housing 81 and absorbing water droplets condensed in the emulsion discharge pipe 31 is included so that the condensed water inlet 8 is included. Solve the problem.

As shown in the figure, the condensation water absorption hole 8 is configured on the upper part of the filter medium layer 7, and the condensation water formed on the outer periphery of the latex discharge pipe 31 falls and is guided to the absorption member 82 to be absorbed. It is to prevent the condensed water from being transferred to the filter medium layer 7 located at the bottom to solve the above-mentioned problem.

The condensed water absorbed by the absorbing member 82 by the above-described operating mechanism is removed by opening the heat pipe 2 and detaching the absorbing member 82 after the end of the treatment, and then removing the moisture from the absorbing member 82. is to be mounted on the receiving housing 81 again.

Although the absorbent member 82 is not shown in the drawing, it is preferable to unitize it so that it can be easily attached and detached from the accommodation housing 81, and the material is not limited as long as it is a material that absorbs moisture.

Through the above description, those skilled in the art will know that various changes and modifications are possible without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: system of the present invention 2: heat pipe
3: oil processing unit 4: gas processing unit

Claims (7)

A heat pipe buried in the ground in a tubular shape, forming a closed space, forming a plurality of inlet holes, and having a heat wire embedded therein;
an oil separation unit including a fluid discharge pipe extending to the lower end of the heat pipe and discharging the fluid deposited on the lower part of the heat pipe, and an oil separation device receiving the fluid from the fluid discharge pipe and separating oil; and
A gas processing unit including a gas discharge pipe extending to an upper end of the heat pipe and discharging the reaction gas introduced into the heat pipe to the outside, and a combustion device receiving and burning the reaction gas from the gas discharge pipe,
The heat pipe,
An exterior inlet hole and an inner tube inlet hole facing each other are formed in a double tube structure of an exterior and an inner tube, and a hot wire is embedded between the exterior and the inner tube, and a mesh network is formed in the exterior inlet hole,
An inflow control hole is mounted on the inlet hole, and the inflow control hole has a tubular shape with one surface open, a mesh network formed on the other surface, and a blocked side, so that the inflow control hole is mounted on the inlet hole to achieve the outer inlet hole A mesh network is formed and a blocked surface is formed between the exterior and the inner tube,
Contaminated soil heat treatment system, characterized in that the clogged surface is composed of a heat shield mounting plate configured with an elastic material at both ends of the clogged surface and formed with a clogged surface and a gap between the attaching part and the attaching part to form a heat shield space.
According to claim 1,
The gas discharge pipe is configured to communicate with a collection space formed by a collection partition partitioning the inside of the heat pipe at the upper end of the heat pipe.
delete delete delete According to claim 2,
Contaminated soil heat treatment system, characterized in that the filter medium layer is formed at the lower end of the collection space to filter foreign substances while passing the reaction gas and to form a through hole so that the latex discharge pipe passes through.
According to claim 6,
At the location where the through hole is formed, an accommodation housing having a container shape with one surface open and a through hole through which the fluid discharge pipe passes through the central portion opposite to the through hole is formed, and water droplets mounted on the accommodation housing and condensed in the fluid discharge pipe are formed. Contaminated soil heat treatment system, characterized in that the condensed water inlet composed of an absorbing member to be absorbed is included.

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