KR102375205B1 - Soil remediation equipment - Google Patents

Abstract

The present invention relates to a soil purification plant. Soil purification equipment according to an embodiment of the present invention, the soil mixture is supplied therein a floating chamber; a bubbler disposed within the floatation chamber; and a hydro-cyclone device that receives the soil mixture discharged from the floatation chamber and performs a process of classifying the soil mixture according to at least one of the size and mass of the particles of the soil mixture. The bubble generator may generate bubbles, and the generated bubbles may be floated upward together with the fine soil supplied into the floatation chamber and discharged to the outside.

Description

Soil remediation equipment {SOIL REMEDIATION EQUIPMENT}

The present invention relates to a soil purification plant.

Although today's industry has been developed almost entirely on the basis of fossil fuels, the environmental pollution problem accompanying the development of industry has recently emerged as a serious social problem.

The environmental pollution as described above can be largely divided into air pollution, water pollution, and soil pollution. In particular, the soil pollution problem poses a very serious threat to food production, and not only causes water pollution through groundwater pollution, but is also difficult to solve compared to air pollution or water pollution.

On the other hand, among fossil fuels, oil such as petroleum can be used in various industrial fields and is widely used. It can cause serious soil contamination.

Since it takes a considerable period of time for soil contaminated with oil to naturally recover, interest in techniques for artificially remediing soil contaminated with oil is increasing.

As existing methods for purifying soil contaminated by oil, technologies such as soil washing, thermal desorption, and bio remedation have been proposed.

Looking at the above techniques in detail, soil washing is a technique for separating contaminants from the surface of the soil using water or a surfactant.

This soil washing method has a problem in that the consumption of surfactant becomes uneconomically excessive when treating soil contaminated with heavy oil or crude oil, and when water comes into contact with heavy oil or crude oil, tar balls are generated There is a problem in that the screen is clogged by the tar ball or the contact area of the surfactant is reduced, so that the treatment effect is rapidly reduced.

Thermal desorption is a technology for purifying soil by applying heat to soil contaminated by oil to volatilize oil contaminants, and then burning the volatilized contaminants in a burner. When the volatilized pollutants are burned in the combustion chamber, dust is generated, and the generated dust is filtered through a bag filter to minimize pollutants and then discharged to the atmosphere.

When this thermal desorption method incinerates the contaminants volatilized from the contaminated soil, oxygen amount is required in proportion to the carbon number of the contaminants. If the causative agent of soil contamination is light oil with a relatively low carbon number, there is no problem when purifying by thermal desorption method. The amount of oxygen required is also very large, and since the bag filter must be increased in proportion to this, there is a problem that the post-treatment facility becomes very excessive.

Bio-remedation is a purification technology using microorganisms. According to the US EPA, it is generally possible to treat up to 5,000 mg/kg of TPH, and in the case of soil contaminated with heavy oil or crude oil, the TPH is much higher than 5,000 mg/kg. Since it is generally exceeded, there is a problem that there is a limit to the treatment by microorganisms. Here, TPH is an abbreviation of Total Petroleum Hydrocarbon, which means total petroleum hydrocarbons, and the higher the TPH value, the more serious the soil contamination level is.

In addition, when soil contaminated with crude oil is left for several decades, all light oil components with a relatively low carbon number contained in crude oil are blown away, leaving only difficult-to-decompose heavy oil components, resulting in biological decomposition. It can be difficult, and in a dry and strong sunlight environment, it is practically difficult to supply moisture and breathability necessary for microorganisms, so there is a limitation in that it is difficult to apply the bioremediation process.

In the existing method for purifying soil contaminated by oil, a vibrating screen method is mainly used when separating water and soil particles containing desorbed oil pollutants. Such a vibrating screen method may cause screen clogging by oil contaminants.

In addition, the material and opening area of the screen mounted on the vibrating screen are determined based on the characteristics of the object to be treated and the throughput. However, due to differences in treatment target soil (eg, change in particle size and particle size distribution, change in viscosity of contaminated soil, change in oil and moisture content), poor classification or insufficient treatment capacity may occur.

The pores of the screen are clogged by water containing desorbed oil pollutants flowing into the screen, fine particles among soil particles, and oil as a pollutant. Accordingly, the opening area of the screen is further reduced and there is a risk of overflow.

Embodiments of the present invention were invented in the background as described above, and an object of the present invention is to provide a soil purification facility capable of effectively purifying soil contaminated with oil or the like.

According to one aspect of the present invention, the soil mixture is supplied therein a floatation (floatation) chamber; a bubbler disposed within the floatation chamber; and a hydro-cyclone device that receives the soil mixture discharged from the floatation chamber and performs a process of classifying it according to at least one of a size and a mass of particles of the soil mixture, wherein the bubbler is capable of generating bubbles In addition, the generated air bubbles are floated to the top together with the fine soil supplied into the floatation chamber and discharged to the outside, a soil purification facility may be provided.

The floatation chamber may have an upper overflow guide and a lower outlet, and fine soil suspended upward in the floatation chamber by the bubbles generated by the bubbler overflows from the upper opening of the floatation chamber. It may flow and be discharged to the outside through the upper overflow guide, and the soil mixture discharged through the lower outlet of the floatation chamber may be transported along a circulation line by a pump and supplied to the hydro-cyclone device. .

The upper overflow guide may have an inclined bottom, and the fine soil overflowing from the upper opening of the floatation chamber is moved downward along the inclined bottom of the upper overflow guide and discharged to the outside through the outlet. can be

The hydro-cyclone device may include a cylinder portion including a cylinder inlet, an overflow outlet, and a downflow outlet into which the soil mixture discharged from the floating device is introduced.

The plurality of floatation chambers may be provided, and the plurality of floatation chambers include a first floatation chamber supplied with a soil mixture from the outside, and a second flow chamber that receives the soil mixture discharged from the first floatation chamber. It may include a presentation chamber.

The plurality of floatation chambers may further include a third floatation chamber receiving the soil mixture discharged from the second floatation chamber.

A plurality of hydro-cyclone devices may be provided, and the plurality of hydro-cyclone devices may include a first hydro-cyclone device and a second hydro-cyclone device, and the soil discharged from the first floatation chamber. The mixture may be supplied to the first hydro-cyclone device, and any part of the soil mixture discharged from the first hydro-cyclone device may be supplied to the second floatation chamber.

A portion of the soil mixture discharged from the first hydro-cyclone device and supplied to the second floatation chamber may be discharged through the downflow outlet.

Another portion of the soil mixture discharged from the first hydro-cyclone device may be returned to the first floatation chamber through the overflow outlet.

The soil mixture discharged from the second floatation chamber may be supplied to the second hydro-cyclone device, and any part of the soil mixture discharged from the second hydro-cyclone device may be supplied to the third floatation chamber. .

Some of the soil mixture discharged from the second hydro-cyclone device and supplied to the third floatation chamber may be discharged through the downflow outlet.

Another part of the soil mixture discharged from the second hydro-cyclone device may be returned to the second floatation chamber through the overflow outlet.

The plurality of hydro-cyclone devices may further include a third hydro-cyclone device receiving the soil mixture discharged from the third floatation chamber, and from the third floatation chamber to the third hydro-cyclone device. Any part of the supplied soil mixture may be discharged through the downflow outlet of the third hydro-cyclone device, and another part of the soil mixture supplied from the third floatation chamber to the third hydro-cyclone device is It may be returned to the third floatation chamber through the overflow outlet of the third hydro-cyclone device.

According to embodiments of the present invention, there is an effect that can effectively separate water and soil particles containing desorbed oil pollutants.

1 is a conceptual diagram of a soil purification facility according to an embodiment of the present invention.
2 is a side view of a floatation chamber of a soil remediation facility according to another embodiment of the present invention.
3 is a plan view of a floatation chamber of a soil purification facility according to another embodiment of the present invention.

Hereinafter, specific embodiments for implementing the spirit of the present invention will be described in detail with reference to the drawings.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, when it is stated that a component is 'connected', 'connected', 'supplied', 'transferred', or 'contacted' to another component, it may be directly connected, connected, supplied, transmitted, or contacted with the other component. However, it should be understood that other components may exist in the middle.

The terminology used herein is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in the present specification, the expressions of the upper side, the lower side, the side, etc. are described with reference to the drawings, and it is to be noted in advance that if the direction of the corresponding object is changed, it may be expressed differently. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings, and the size of each component does not fully reflect the actual size.

Also, terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Hereinafter, a soil purification facility according to an embodiment of the present invention will be described with reference to FIG. 1 . 1 is a flowchart illustrating a method of purifying soil using a soil purification facility according to an embodiment of the present invention.

The soil purification facility 10 according to an embodiment of the present invention may receive soil (contaminated soil) contaminated with heavy oil or crude oil, and soil (purified soil) purified by removing heavy oil or crude oil contained in the provided contaminated soil can create

In this embodiment, the soil purification facility 10 will be described as an example of receiving the contaminated soil contaminated by heavy oil or crude oil, but the spirit of the present invention is not limited thereto. For example, the soil purification facility 10 may be provided with contaminated soil contaminated by other types of oil as well as heavy oil or crude oil.

Hereinafter, a soil purification facility 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 . 1 is a conceptual diagram illustrating a soil purification facility 10 .

Referring to FIG. 1 , the soil purification facility 10 performs a process of separating soil particles from water containing desorbed pollutants. The soil remediation facility 10 may include a floatation chamber 100 , a bubbler 200 , and a hydro-cyclone device 300 .

A mixture of water and soil particles containing desorbed oil pollutants may be supplied and stored in the floating chamber 100 .

The floatation chamber 100 may be used in connection with a plurality of floatation chambers 100 according to a target concentration to separate and discharge water and soil particles containing desorbed oil pollutants.

The screen device 400 may be provided at the rear end of the last stage of the plurality of floatation chambers 100 .

An upper overflow guide 110 may be provided at an upper side of the float chamber 100 , and a lower outlet 120 may be formed at a lower side of the float chamber 100 . The float chamber 100 , the upper overflow guide 110 , and the bubble generator 200 may be referred to as a float unit.

The upper overflow guide 110 includes a bottom part inclined toward the floatation chamber 100 disposed on the upstream side, a side wall surrounding the bottom part, and fine soil and water provided on the side wall and moving downward along the inclined bottom part. and an outlet through which oil pollutants are discharged.

Fine earth, water, and oil contaminants overflowing from the upper opening of the floating chamber 100 are moved downward along the inclined bottom of the upper overflow guide 110 and discharged through the outlet, for example, transported such as a pump. It can be delivered to the previous stage of the float chamber 100 or a predetermined device through the means.

The bubble generator 200 may be disposed in the float chamber 100 . The bubble generator 200 may generate microbubbles, and the generated bubbles may be floated to the top together with the fine soil to which oil contaminants stored in the floatation chamber 100 are attached. The bubbler 200 may be, for example, an air sparger. The bubble generator 200 may be disposed to form bubbles in the lower portion of the floating chamber 100 .

The soil mixture (soil, water and oil components, etc.) discharged through the lower outlet of the floatation chamber 100 is transferred along the circulation line L by the pump P, and the second floatation chamber 100 of the next step ) may be supplied to the hydro-cyclone device 300 before being supplied.

The hydro-cyclone apparatus 300 may perform a hydro-cyclone process of classifying the soil mixture received from the floatation chamber 100 according to at least one of a particle size and a mass.

In the hydro-cyclone apparatus 300 , a hydro-cyclone process of classifying the soil mixture received from the floating chamber 310 according to at least one of a particle size and a mass may be performed. The hydro-cyclone device 300 includes at least one cylinder part 310 , and a pump P. For example, the cylinder part 310 may be formed in a cone shape. The cylinder part 310 includes an inlet 311 , a first cylinder outlet (overflow outlet) 312 , and a second cylinder outlet (downflow outlet) 313 . The inlet 311 is formed so that the soil mixture is eccentrically introduced toward the inner wall of the cylinder unit 310 , the first cylinder outlet 312 is provided at the upper portion of the cylinder unit 310 , and the second cylinder outlet 313 is the cylinder It may be provided under the part 310 . The pump P may pressurize the soil mixture supplied to the cylinder unit 310 . Also, the soil mixture may be introduced in a tangential direction of the cylinder unit 310 . The soil mixture descends to the lower part of the cylinder part 310 while rotating.

While the soil mixture descends to the lower part of the cylinder part 310 , a vortex of the soil mixture is formed in the cylinder part 310 , and the soil mixture undergoes a separation action. The soil mixture is eccentrically introduced into the cylinder part 310 through the inlet 311 , and the soil mixture inside the cylinder part 310 is rotated by the flow eccentrically introduced through the inlet 311 to receive centrifugal force. The first stream 314 containing relatively small and light particles rises from the central portion of the cylinder 310 and is discharged through the first cylinder outlet (overflow outlet) 312 . The second flow 315 containing relatively large and heavy particles is concentrated toward the outer wall side of the cylinder part 310 by centrifugal force. The second flow 315 descends downward of the cylinder unit 310 and is discharged from the cylinder unit 310 through the second cylinder outlet (downflow outlet) 313 .

A level measuring device (not shown) capable of measuring the level of the stored soil mixture may be provided in the floating chamber 100 .

In addition, the circulation line (L) may be provided with a flow meter (not shown) and a pressure meter (not shown) capable of measuring the flow rate and pressure of the soil mixture transferred along the circulation line (L).

Hereinafter, operations of the float chamber 100 and the hydro-cyclone device 300 according to the present embodiment will be described.

First, a mixture of water and soil particles containing desorbed oil pollutants is supplied to the first floatation chamber 100 .

The fine soil, water, and oil contaminants of the mixture are suspended upward by the microbubbles generated by the bubbler 200 . The fine soil, water, and oil contaminants suspended in the upper part together with the microbubbles overflow from the upper opening of the floatation chamber 100 and are moved downward along the inclined bottom of the upper overflow guide 110 through the outlet. is emitted

The soil mixture discharged through the lower outlet of the first float chamber 100 is transported along the circulation line L by the pump P and supplied to the first hydro-cyclone device 300 .

Water and some fine soil including contaminants in the soil mixture supplied to the first hydro-cyclone device 300 are discharged through the first cylinder outlet 312 of the cylinder unit 310, and the first float chamber ( 100) is returned. The soil mixture separated by the second flow 315 is discharged through the second cylinder outlet 313 of the cylinder part 310 and is supplied to the second floatation chamber 100 .

The fine soil, water, and oil contaminants overflowing from the upper opening of the second float chamber 100 are moved downward along the inclined bottom of the upper overflow guide 110 and discharged through the outlet, and the first flow It is transferred to the presentation chamber 100 . The upper overflow guide 110 of the second float chamber 100 is configured so that the fine soil, water, and oil contaminants overflowing from the upper opening of the second float chamber 100 can flow naturally by gravity. It may be disposed at a higher position than the upper overflow guide 110 of the first float chamber 100 . In addition, the bottom portion of the upper overflow guide 110 provided in the second float chamber 100 may be inclined downward toward the first float chamber 100 .

The soil mixture discharged through the lower outlet of the second float chamber 100 is transported along the circulation line L by the pump P and supplied to the second hydro-cyclone device 300 .

Water and some fine soil including contaminants discharged through the first cylinder outlet 312 of the second hydro-cyclone device 300 are returned to the second floatation chamber 100 of the previous stage. The soil mixture separated into the second flow 315 by the second hydro-cyclone device 300 is discharged through the second cylinder outlet 313 of the cylinder part 310 and supplied to the third floatation chamber 100 . do.

The fine soil, water, and oil contaminants overflowing from the upper opening of the third floatation chamber 100 are moved downward along the inclined bottom of the upper overflow guide 110 and discharged through the outlet, and the second flow It is transferred to the presentation chamber 100 . So that the fine soil, water, and oil contaminants overflowing from the upper opening of the third float chamber 100 can flow naturally by gravity, the upper overflow guide 110 of the third float chamber 100 is It may be disposed at a higher position than the upper overflow guide 110 of the second float chamber 100 . Also, the bottom portion of the upper overflow guide 110 provided in the third floatation chamber 100 may be inclined downward toward the second floatation chamber 100 .

In this way, the soil remediation process is sequentially performed by the plurality of floatation chambers 100 and the hydro-cyclone device 300 .

Washing water is supplied to the floating chamber 100 of the last stage, and the material to be removed is moved and discharged together with the fine soil and contaminants from which contaminants are not removed in the direction of the first float chamber 100 .

The soil mixture discharged through the lower outlet of the mixture storage chamber 100 of the last stage is transferred along the circulation line L by the pump P and is supplied to the hydro-cyclone device 300 of the last stage.

Water including contaminants discharged through the first cylinder outlet 312 of the hydro-cyclone device 300 of the last stage and some fine soil are supplied to the floatation chamber 100 of the previous stage. The soil mixture separated into the second flow 315 by the hydro-cyclone device 300 of the last stage is discharged through the second cylinder outlet 313 of the cylinder part 310, and the last stage of the floatation chamber 100 It is supplied to the screen device installed at the rear end of the

Although the embodiments of the present invention have been described as specific embodiments, these are merely examples, and the present invention is not limited thereto, and should be construed as having the widest scope according to the basic idea disclosed in the present specification. A person skilled in the art may implement a pattern of a shape not specified by combining/substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

10: soil purification equipment 100: floatation chamber
110: overflow guide 120: lower outlet
200: bubbler 300: hydro-cyclone device
310: cylinder 400: screen device
L: circulation line P: pump

Claims (3)

a floatation chamber into which the soil mixture is supplied;
a bubbler disposed within the floatation chamber;
a hydro-cyclone device that receives the soil mixture discharged from the floating chamber and performs a process of classifying the soil mixture according to at least one of a size and a mass of particles of the soil mixture; and
Including a screen device into which at least a portion of the soil mixture separated from the hydro-cyclone is introduced,
The bubble generator may generate bubbles, and the generated bubbles are floated to the top together with the fine soil supplied into the floatation chamber and discharged to the outside,
The float chamber has an upper overflow guide and a lower outlet,
Fine soil suspended upward in the floatation chamber by the bubbles generated by the bubbler overflows from the upper opening of the floatation chamber and flows into the upper overflow guide,
The soil mixture discharged through the lower outlet of the floating chamber is transported along a circulation line by a pump and supplied to the hydro-cyclone device,
A plurality of the floating chambers are provided,
A plurality of the floating chambers include a first floatation chamber supplied with a soil mixture from the outside, a second floatation chamber that receives the soil mixture discharged from the first floatation chamber, and the soil discharged from the second floatation chamber. a third floatation chamber to receive the mixture;
The upper overflow guide of the second float chamber is disposed above the upper overflow guide of the first float chamber, and has a bottom inclined downward;
The upper overflow guide of the third floatation chamber is disposed above the upper overflow guide of the second floatation chamber, and has a bottom inclined downward;
The fine soil overflowing from the upper opening of the second floating chamber is moved downward along the inclined bottom of the upper overflow guide of the second floating chamber, and through the outlet to the upper opening of the first floating chamber. discharged,
The fine soil overflowing from the upper opening of the third floatation chamber is moved downward along the inclined bottom of the upper overflow guide of the third floatation chamber and through the outlet to the upper opening of the second floatation chamber. discharged,
The hydro-cyclone device includes a cylinder part including a cylinder inlet, an overflow outlet, and a downflow outlet into which the soil mixture discharged from any one of the plurality of floatation chambers is introduced,
The hydro-cyclone device is provided in plurality,
The plurality of hydro-cyclone devices includes a first hydro-cyclone device and a second hydro-cyclone device disposed above the first hydro-cyclone device,
The soil mixture discharged from the first floatation chamber is supplied to the first hydro-cyclone device,
A portion of the soil mixture discharged from the first hydro-cyclone device is supplied to the upper opening of the second floatation chamber, and the remainder is returned to the upper opening of the first floatation chamber,
The soil mixture discharged from the second floatation chamber is supplied to the second hydro-cyclone device, and a portion of the soil mixture discharged from the second hydro-cyclone device is supplied to the upper opening of the third floatation chamber. become,
Some of the soil mixture discharged from the second hydro-cyclone device and supplied to the third floatation chamber is discharged through the downflow outlet,
Another portion of the soil mixture discharged from the second hydro-cyclone device is returned to the upper opening of the second floatation chamber through the overflow outlet;
The plurality of hydro-cyclone devices further include a third hydro-cyclone device receiving the soil mixture discharged from the third floatation chamber,
Any part of the soil mixture supplied from the third floatation chamber to the third hydro-cyclone device is discharged through the downflow outlet of the third hydro-cyclone device and is supplied to the screen device,
another portion of the soil mixture supplied from the third floatation chamber to the third hydro-cyclone device is returned to the top opening of the third floatation chamber through the overflow outlet of the third hydro-cyclone device;
Soil purification plant. The method of claim 1,
Some of the soil mixture discharged from the first hydro-cyclone device and supplied to the second floatation chamber is discharged through the downflow outlet,
Soil purification plant. 3. The method of claim 2,
Another portion of the soil mixture discharged from the first hydro-cyclone device is returned to the first floatation chamber through the overflow outlet.
Soil purification plant.

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