CN114733893B - Modular cleaning device for soil purification - Google Patents

Modular cleaning device for soil purification Download PDF

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Publication number
CN114733893B
CN114733893B CN202210399411.7A CN202210399411A CN114733893B CN 114733893 B CN114733893 B CN 114733893B CN 202210399411 A CN202210399411 A CN 202210399411A CN 114733893 B CN114733893 B CN 114733893B
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China
Prior art keywords
soil
contaminated soil
contaminated
cleaning
water
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CN202210399411.7A
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Chinese (zh)
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CN114733893A (en
Inventor
李在元
俞景珉
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Jiuene Corp
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Jiuene Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/04—Stationary flat screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09C—RECLAMATION OF CONTAMINATED SOIL
    • B09C1/00—Reclamation of contaminated soil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2230/00—Specific aspects relating to the whole B07B subclass
    • B07B2230/01—Wet separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2230/00—Specific aspects relating to the whole B07B subclass
    • B07B2230/04—The screen or the screened materials being subjected to ultrasonic vibration

Abstract

The modular cleaning apparatus for soil purification of the present invention comprises: a loading screening unit for cleaning and screening the loaded contaminated soil; a transfer unit for transferring contaminated soil; a cleaning part for spraying high-pressure water to the polluted soil and stripping the polluted substances; a contaminated soil separation unit which agitates the contaminated soil, separates the contaminated material from the purified soil, and discharges only the purified soil; and a discharge unit for transferring the purified soil, wherein the input screening unit includes: a vibration hopper forming a throw-in path and gradually narrowing from an upper portion to a lower portion; a body connected to the vibration hopper, one end portion of the body being disposed higher than the other end portion; a screening screen for screening contaminated soil having a particle size of not more than a predetermined particle size; a nanobubble jet member for jetting water to contaminated soil to induce pre-peeling; and an ultrasonic vibrator that generates acoustic cavitation and peels off a contaminant in advance by using impact energy when the bubble breaks.

Description

Modular cleaning device for soil purification
Technical Field
The present invention relates to a modular type cleaning apparatus for soil purification, and more particularly, to a modular type cleaning apparatus for soil purification, which is capable of continuously performing processes such as screening, transferring, cleaning, classifying, etc., on contaminated soil input by using a plurality of modular structures, thereby effectively removing foreign substances or pollutants of fine particles contained in the contaminated soil, and improving cleaning efficiency.
Background
In general, environmental pollution is classified into atmospheric pollution, water quality pollution, and soil pollution, wherein, in particular, soil pollution not only poses a serious threat to grain production, but also induces pollution of drinking water sources due to pollution of surface water and ground water, and thus, it is required to purify contaminated soil in an early time.
Recently, soil pollution occurring in korea occurs mainly due to an endless landfill or leakage accident of liquid waste, and in addition, due to underground diffusion of overground piles placed during long-term industrial activities.
The contaminated soil produced by this production factor is produced by a variety of chemical species, not by a single class of compounds, and representative combined contamination is the morphology of oils and heavy metals, produced in most industrial activity areas.
On the other hand, as methods for restoring contaminated soil, there are a physicochemical method such as soil washing, incineration, solidification, stabilization, solvent extraction, etc., and a biological method such as soil cultivation, compounding, biological aeration, plant restoration, etc., among which a soil washing method is a method capable of restoring contaminated soil relatively quickly.
The method for cleaning contaminated soil is a method in which water or a suitable cleaning agent (organic matter: surfactant, inorganic matter: inorganic acid or organic acid) is used to separate or dissolve a contaminant in which a harmful organic contaminant bound to soil particles is present by hydrophobic binding, or an inorganic contaminant such as heavy metal is dissolved or peeled off a contaminant present on the soil surface by adsorption, coprecipitation, or the like, to separate/remove the contaminant.
However, the washing in the foregoing steps sequentially goes through the processes of throwing, screening, eluting, neutralizing, water treatment and sludge dewatering, and the solid-liquid ratio 1 is accompanied in the screening and eluting processes: 3 or more, and especially, when there is a pollution of a certain concentration or more, the efficiency of removing only water is low, and the contaminated soil is reacted with the cleaning solvent, and thus, a stirring time of 30 minutes is required, and there are disadvantages that the continuous treatment is limited and excessive costs of medicines are incurred, and costs for neutralizing the soil affected by the medicines are incurred, and that the soil health is deteriorated and plant growth is affected by applying a strong cleaning solvent.
In contrast, in the case where only water is used for separating and removing the contaminants, as described above, a solid-to-liquid ratio of 1 is accompanied: if the amount of the organic contaminants is 3 or more, the water treatment facility becomes excessive, and if the amount of the contaminants is equal to or more than a predetermined concentration, it is difficult to expect the purification efficiency, and in particular, if the organic contaminants and the inorganic contaminants are simultaneously present, there is a limitation in that different cleaning solvents are applied at the same time.
Disclosure of Invention
Technical problem
The invention aims to provide a modular cleaning device for soil purification, which uses a plurality of modularized structures to continuously perform processes such as screening, transferring, cleaning, separating and the like on contaminated soil input into a vibration hopper, thereby improving the cleaning efficiency when foreign matters or pollutants are removed, and simultaneously, the ratio of the contaminated soil to water is applied as 1:2 or less, only a washing solvent or water at a level not requiring neutralization is used as a washing liquid, and the amount of chemicals, waste liquid treatment and water treatment is reduced, while providing a physical treatment technique which is free from problems in soil health.
Technical proposal
The modular washing apparatus for soil purification according to the present invention comprises: a loading screening unit for cleaning and screening the loaded contaminated soil; a transfer unit that transfers the contaminated soil discharged from the input screening unit; a cleaning part for spraying high-pressure water to the polluted soil transferred along the transfer path of the transfer part and stripping the polluted substances of the polluted soil; a contaminated soil separation unit for stirring the contaminated soil discharged from the washing unit, separating the contaminated material peeled from the contaminated soil from the purified soil, and selectively discharging only the purified soil; and a discharge unit that conveys the purified soil discharged from the contaminated soil separation unit along a discharge path.
The input screening unit may include: a vibration hopper forming a contaminated soil throwing path and having a shape which is narrower as the hopper is closer to the lower part from the upper part; a body; which is connected to the vibration hopper and has one end portion arranged higher than the other end portion so as to move contaminated soil discharged from the vibration hopper; a screening screen provided inside the body for screening contaminated soil having a particle size smaller than a predetermined particle size; a nanobubble jet member provided in plural toward the screen mesh, for jetting water to contaminated soil to induce nanobubble-based pre-peeling; and an ultrasonic vibrator that generates acoustic cavitation to the contaminated soil moving through the screen mesh and peels off the contaminated material in advance by using impact energy generated when the air bubbles are broken.
The nanobubble jet member jets water 2 times or less of the contaminated soil put into the body, and can inject nanobubble water.
The transfer unit can remove and transfer the contaminated soil contaminated with the nanobubble water and the contaminated soil in advance by a transfer screw provided in the transfer path.
And, the cleaning part may include: a surface peeling section formed by reducing the diameter of the inlet side, for generating a cavity bubble for the contaminated soil discharged from the transfer section, peeling the contaminated soil from the contaminated soil by impact energy generated during generation and rupture of the cavity bubble, and generating shear stress and vertical stress by high-speed high-pressure water flow, thereby peeling the contaminated soil; a first collision section formed by expanding the inner diameter of the end of the surface peeling section, wherein the fluid passing through the surface peeling section generates turbulence due to pressure change, and collisions between particles occur; and a second collision section for causing the contaminated soil to collide with the collision member after passing through the first collision section, thereby further stripping the contaminated material.
The cleaning section may further include an ultrasonic vibrator provided in the first collision section, for generating acoustic cavitation, so as to additionally peel off the contaminant by using impact energy generated when the bubble is broken.
And, the contaminated soil separation portion may include: a soil sedimentation member for flowing in the contaminated soil discharged from the washing unit, the soil sedimentation member including a stirrer for discharging the contaminated soil having a particle size equal to or greater than a predetermined interval; a waste water discharging member connected to one side of the soil settling member for discharging waste water contained in contaminated soil flowing into the soil settling member; and a contaminated gas exhaust part connected to the other side of the soil settlement part for sucking and exhausting the contaminated gas of the soil settlement part.
The contaminated soil separation section may further include a fine bubble generator provided on a lower inclined surface having a narrowed diameter in the interior of the soil settlement member, for supplying fine bubbles to the contaminated soil surface.
Also, the contaminated gas exhaust means may include: a main body having a suction inlet for moving the polluted gas of the soil settlement member; a turbo blower installed inside the main body and allowing a contaminated gas to flow into the main body through the suction port; and activated carbon that purifies the polluted gas flowing into the main body through the turbo blower.
The present invention may further include a magnetic force screening unit including: a magnetic body having one end connected to the washing unit, allowing purified soil to flow in, and provided with a guide member for guiding movement of the purified soil, and attached with a mineral-like contaminant having magnetism contained in the purified soil guided by the guide member;
a cylindrical magnetic member provided at an end of the guide member, for separating metal contained in the purified soil flowing into the guide member, and storing the separated metal; and a driving member provided on an outer side surface of the guide member for changing an angle of the guide member to provide a driving force to discharge the mineral-like contaminant having magnetism separated by the cylindrical magnetic member through the magnetic discharge port.
Effects of the invention
The invention has the following effects: the processes of screening, transferring, cleaning, separating and the like are continuously performed by using a plurality of structures for modularizing the contaminated soil put into the vibration hopper, thereby improving the cleaning efficiency when foreign matters or pollutants are removed, and simultaneously, the ratio of the contaminated soil to water is applied as 1:2 or less, only a washing solvent or water at a level not requiring neutralization is used as a washing liquid, and a physical treatment technique is provided which reduces the amount of chemicals used, the waste liquid treatment and the water treatment capacity and does not have a problem in soil health.
The invention has the following effects: since a plurality of structures are modularized into one device, the apparatus can be simplified, and thus, the apparatus can be used simply in a mobile manner, and if necessary, additional apparatus such as magnetic screening and floating screening can be selectively applied simply to the modularized apparatus.
In addition, the present invention uses nano bubble water as process water in the processes of screening, transferring and cleaning, and uses the energy generated when the nano bubbles break to guide the pre-stripping of the pollutant existing on the surface of the polluted soil.
The invention has the following effects: during the period in which the high-speed high-pressure water flow passes through the diameter variation section, the first stripping of the contaminant is achieved by the generation of cavitation bubbles (cavitation bubbles) based on the shearing force and the depressurization and the impact energy generated during the rupture, and at the same time, the second stripping is achieved by the impact applied to the surface of the contaminated soil by the impact between the contaminated soil by the turbulence generated by releasing the pressure as the diameter is gradually enlarged, and the third stripping is achieved by the impact of the contaminated soil with the flange surface, thereby achieving the effective stripping by the simple physical treatment process only.
The present invention has an effect in that, in the course of passing through a rapid diameter change section by a high-speed high-pressure water flow, separation of a contaminated material from the surface of contaminated soil is achieved by using impact energy generated in the course of generating and breaking a cavity bubble due to a reduction in hydraulic pressure, and then, collision between contaminated soil particles is guided by turbulence generated in the course of releasing pressure due to a diameter change, so that second separation is achieved by using collision force between particles, and third separation is achieved by using collision force generated in the course of colliding with a collision member at the final end, thereby achieving effective separation by a simple physical treatment process only.
Thus, the present invention can perform a wide range of treatments without limiting the types and characteristics of contaminated materials, thereby expanding the versatility of the device application, and can remove the contaminated materials only by pure water without using additional chemicals, so that the washing water can be easily reused, thereby having an effect of enabling an economical treatment.
Drawings
Fig. 1 is a view showing the overall structure of a module type cleaning apparatus for soil purification according to an embodiment of the present invention.
Fig. 2 is a view showing a loading screen unit of a modular cleaning apparatus for soil purification according to an embodiment of the present invention.
Fig. 3 is a view showing a transfer section of a module type cleaning apparatus for soil cleaning according to an embodiment of the present invention.
Fig. 4 is a view showing a cleaning section of a module type cleaning device for soil cleaning according to an embodiment of the present invention.
Fig. 5 is a diagram showing a principle of removing a contaminant from a cleaning section of a module type cleaning apparatus for soil cleaning according to an embodiment of the present invention.
Fig. 6 is a view showing a contaminated soil separation section and a discharge section of a module type cleaning apparatus for soil purification according to an embodiment of the present invention.
Fig. 7 is a view showing a contaminated gas exhaust member of a module type cleaning apparatus for soil purification according to an embodiment of the present invention.
Fig. 8 is a view showing a magnetic force screening part of a module type washing apparatus for soil purification according to an embodiment of the present invention.
Symbol description
100: input screening unit, 110, 302: hopper, 120: body, 130: screening net, 140, 141, 142, 510: nanobubble jet member, 150: nanobubble generating device, 160: high-pressure water generating device, 170, 310: ultrasonic vibrator, 200: transfer unit, 210: transfer screw, 300: cleaning unit, 304: injection device, 306: stripping part, 320: collision member, 330: trapping port, 340: cleaning the discharge port, 400: contaminated soil separation section, 410: soil settlement means, 412: stirrer, 420: waste water discharge member, 430: a contaminated gas exhaust member, 432: body, 432a: suction port, 432b: connecting tube, 434: turbo blower, 436: activated carbon, 440: microbubble generator, 500: discharge unit, 502: purge outlet, 520: purified soil dewatering device, 600: magnetic force screening part, 610: magnetic body, 611: guide member, 612: nonmagnetic discharge port, 620: cylindrical magnetic member, 621: cylindrical magnet, 622: doctor blade, 623: magnetic discharge port, 630: a driving part, A: surface peeling interval, B: first collision interval, C: and a second collision zone.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The advantages and features of the present invention and the methods of accomplishing the same will become apparent by reference to the accompanying drawings and the detailed description of the embodiments that follow.
However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various forms different from each other, and the present embodiment only makes the disclosure of the present invention more complete, and is provided to fully inform the person skilled in the art of the scope of the present invention, and the scope of the present invention is defined only by the claims.
In the process of describing the present invention, if it is determined that the gist of the present invention is likely to be confused with known techniques or the like, a detailed description thereof will be omitted.
Fig. 1 is a view showing the overall configuration of a module type washing apparatus for soil purification according to an embodiment of the present invention, fig. 2 is a view showing a loading screening portion of the module type washing apparatus for soil purification according to an embodiment of the present invention, and fig. 3 is a view showing a transfer portion of the module type washing apparatus for soil purification according to an embodiment of the present invention.
Fig. 4 is a view showing a cleaning section of a module type cleaning apparatus for soil cleaning according to an embodiment of the present invention, and fig. 5 is a view showing a principle of contaminant separation of the cleaning section of the module type cleaning apparatus for soil cleaning according to an embodiment of the present invention.
Also, fig. 6 is a view showing a contaminated soil separating part and a discharging part of a module type washing apparatus for soil purification according to an embodiment of the present invention, fig. 7 is a view showing a contaminated gas discharging part of a module type washing apparatus for soil purification according to an embodiment of the present invention, and fig. 8 is a view showing a magnetic force screening part of a module type washing apparatus for soil purification according to an embodiment of the present invention.
As shown in fig. 1, the module type cleaning apparatus for soil purification according to the present embodiment includes an input screening part 100, a transfer part 200, a cleaning part 300, a contaminated soil separating part 400, a discharging part 500, and a magnetic screening part 600.
Also, water sprayed from a module type washing device for soil purification or water used as high-pressure water may flow in from the nano bubble device. In this case, the nanobubble device forms nanobubbles in water, so that fine bubbles in water can contact the surface of soil, thereby removing fine foreign matter adhering to the soil.
According to the modular type cleaning apparatus for soil purification of the present embodiment, the plurality of structures as described above are modularized into one apparatus, and therefore, the facility can be simplified, and not only can the facility be used in a portable manner, but also, if necessary, the contaminated soil to be input can be cleaned and screened by the input screening portion 100 in the plurality of structures as described above in a modular manner. Additional equipment such as a nano-bubble water generating device, a high-pressure water spraying device and the like can be selectively and simply applied to the modularized device.
For this purpose, as shown in fig. 2, the input screening unit 100 includes a vibration hopper 110, a main body 120, a screen 130, a nanobubble jet member 140, a nanobubble generating device 150, a high-pressure water generating device 160, an ultrasonic vibrator 170, and a magnetic member 180.
The nanobubble jet member 140 and the nanobubble generating device 150 are provided in the input sieving section 100, and water containing nanobubbles is injected simultaneously with the input, so that contaminated soil passing through the input sieving section 100 can be peeled off in advance.
First, the vibration hopper 110 forms a contaminated soil throwing path, and is formed in a shape that gradually narrows from the upper part to the lower part, and this structure can be used to advantage when contaminated soil is thrown in by a forklift or the like.
The main body 120 is connected to the outlet side of the vibration hopper 110, and one end portion is disposed higher than the other end portion so that contaminated soil thrown in through the vibration hopper 110 of the above-described shape moves along the inclined surface and is screened.
The screen 130 is provided inside the main body 120 to have a predetermined length, and discharges foreign matter and stones (gravel) having a predetermined particle diameter or more, for example, 10 to 60mm or more, out of the contaminated soil charged into the main body 120, screens the gravel and soil having a predetermined particle diameter or less, and discharges the gravel and soil to the other end portion disposed low, thereby transferring only the gravel and soil having a predetermined particle diameter or less to the post-process for cleaning and restoring the soil.
The nanobubble jet member 140 is provided in plurality so as to face the upper surface of the screen 130, and jets water such as nanobubble water toward the moving contaminated soil.
The nanobubble jet member 140 is connected to a nanobubble generating device 150, and the nanobubble jet member 140 jets the nanobubble water, and the nanobubble generating device 150 pre-peels off the pollutant on the surface of the pollutant by the energy generated when the nanobubbles break.
The nanobubble jet member 140 may be provided with an additional flow meter (not shown), thereby measuring the flow rate of the washing water to be jetted to the contaminated soil, and may be selectively adjusted to a minimum flow rate value capable of securing the screening effect.
Also, the nanobubble jet member 140 may jet the washing water containing nanobubbles at a ratio of less than 2 times the amount of contaminated soil.
At this time, the nanobubble jet member 140 may include a vertical jet member 141 and a horizontal jet member 142, thereby jetting water containing nanobubbles to the inside of the body 120 and preventing soil, foreign materials, and the like from being accumulated inside the body 120.
The nanobubble jet member 140 jets water (cleaning water) containing nanobubbles to the screen 130 so as to correspond to the set jet amount, more preferably, to the same amount of contaminated soil as that put into the body 120, that is, to an amount smaller than 1:2, spraying water according to the proportion.
If a strongly acidic cleaning agent is used instead of water for removing contaminated soil, the reaction time between the acid and the contaminant is required, and the amount of additional chemicals, water, etc. to be added for neutralizing the acid component is also required to be increased.
In this way, in the conventional case, the amount of waste water to be discarded increases, and in this embodiment, only water is used for stripping, so that the discharged water can be reused, and the amount of water to be added together with the contaminated soil at this time is also added at the same rate as the contaminated soil, so that finally, the waste water to be stripped can be reduced.
The plurality of vertical spraying members 141 may be spaced apart from each other and spray water from above and below the screen 130. At this time, the water may be water containing nanobubbles. Thus, the soil flowing into the inside of the main body 120 and mixed with the foreign matter or the like passing through the screen 130 is discharged to the feed screw member through the screen.
Also, the horizontal spraying part 142 may be provided at one side of the lower portion of the screen 130. In this case, the spraying direction of the horizontal spraying part 142 may be installed in a direction perpendicular to the vertical spraying part 141. Also, the horizontal spraying part 142 may be provided at a lower portion of the screen 130. In addition, the horizontal spraying part 142 may move foreign materials and soil to the other side. In addition, high pressure water may be discharged from the horizontal spraying part 142.
This can move the contaminated soil screened out by the screen mesh 130 in the other direction, and can prevent the screened contaminated soil from being stacked under the screen mesh 130.
Meanwhile, gravel and soil having a diameter of 10 to 60mm or less passing through the screen 130 are screened and collected in the lower portion of the main body 120, and at this time, an ultrasonic vibrator 170 may be provided to the screen 130, and the ultrasonic vibrator 170 is used to generate acoustic cavitation (cavitation) to contaminated soil which is put into and moved.
The ultrasonic vibrator 170 is used for pre-stripping the pollutant adsorbed on the polluted soil, and generates acoustic cavitation in the screen 130 during driving, and pre-stripping the pollutant existing on the surface of the polluted soil by utilizing the generated and broken impact energy of the acoustic cavitation generated at the time.
As shown in fig. 2, the input screening unit 100 of the present embodiment may further include a magnetic member 180 along with the above-described structure.
The magnetic member 180 is provided at the other end portion of the inclined body 120, and removes foreign matter composed of iron components such as screws and nails, which may remain in contaminated soil.
That is, the magnetic member 180 is used to prevent malfunction due to the inflow of the foreign matters of the contaminated soil screened by the screen 130 into the equipment system at the rear end, and to remove molten iron such as nails, bolts, nuts, etc. by using a magnetic body before the screened contaminated soil having a particle size less than a predetermined particle size is discharged to the transfer part 200, thereby implementing additional screening of the contaminated soil and preventing the equipment at the rear end from malfunction and clogging.
Further, a vibration member is attached to the body 120 to generate vibration, and although not shown, a motor, a vibration generating device, and the like may be included.
The vibration member is configured to convert a rotational motion into a rocking motion in the vibration generating device that receives a motor driving force, and thus the vibration is transmitted to the main body 120, and the vibration generating device that converts a rotational motion into a rocking motion can be applied to various conventional techniques, and therefore a detailed description thereof is omitted.
The transfer unit 200 is configured to transfer the contaminated soil discharged from the loading and screening unit 100, has a contaminated soil loading port 202 and a contaminated soil discharge port 204, and the contaminated soil loaded on the loading and screening unit 100 discharged to the contaminated soil loading port 202 is peeled off in advance by the operation of a transfer screw 210 provided on the moving rail 200a, transferred to the contaminated soil discharge port 204, and then loaded into the cleaning unit 300.
Such a transfer unit 200 is configured to perform a process of adding less than 1 to contaminated soil and water by the sieving unit 100: 2, the cleaning section 300 can be transferred to a substantially 45-degree inclined state by the rotation of the transfer screw 210 so as not to leak water, and particularly, the contaminated materials contained in the contaminated soil can be continuously peeled off and dissolved and removed by induction during the movement by the transfer screw 210, so that the pretreatment is performed before the cleaning section 300 performs the cleaning.
At this time, the nanobubbles enhance the contaminant stripping effect of the soil surface, thereby improving the pre-stripping effect as a pre-treatment.
That is, before entering the cleaning unit 300, the contaminated soil and the water containing the nanobubbles are mixed, and the nanobubbles move to the cleaning unit 300 while cleaning the contaminated soil for the first time.
The cleaning unit 300 sprays high-pressure water containing nanobubbles onto the contaminated soil transferred along the movement path and put into the hopper 302, and peels off the contaminated soil of the contaminants. For example, the cleaning part 300 may be an ejector. The vertical spraying part 141 and the washing part 300 may be selectively sprayers such that high pressure water may be sprayed.
As shown in fig. 3, the cleaning portion 300 is provided with a surface peeling section a, a first collision section B, and a second collision section C along the longitudinal direction.
The hopper 302 is charged into the sieving section 100 and the transfer section 200 to be smaller than 1:2 is added to the contaminated soil together with water.
Here, the contaminated soil charged through the hopper 302 is sprayed with high-pressure water containing nanobubbles by the spraying device 304, thereby realizing the separation of the contaminated material.
Wherein water sprayed at high pressure by the spraying device 304 uses only low concentration of acid or water within the buffering capacity of the soil, and particularly preferably, contains nanobubbles.
This is because, in order to separate the water containing the nanobubbles, a general fluid containing a separate cleaning agent for separation is used instead of the conventional fluid, and thus, the reuse of the water (cleaning water) is made economical and easy in the subsequent contaminant separation step.
Meanwhile, as shown in fig. 4, the peeling part 306 forms a moving path for contaminated soil, and is provided such that a flow rate of contaminated soil moving together with water increases in a state where contaminants are partially peeled off by high-pressure water.
The stripping section 306 uses cavitation bubbles generated by a structure in which the hydraulic pressure decreases when the high-speed high-pressure water flow passes through the sharp cross-section reduction zone, and achieves continuous stripping of the contaminated material adhering to the contaminated soil together with the high-pressure water jet device 304.
For this purpose, the peeling portion 306 is provided with a surface peeling section a, a first collision section B, and a second collision section C along the longitudinal direction.
First, in order to increase the flow rate of the contaminated soil, the surface peeling section a is rapidly reduced in diameter from the inlet side, and shear stress and vertical stress are generated on the contaminated soil, thereby peeling the contaminated material.
That is, in the surface peeling section a, when the contaminated soil moves together with water, the diameter thereof becomes small, and therefore, the pressure acting on the moving contaminated soil becomes high, the pressure of the fluid becomes low, and the flow rate becomes high, and at this time, when high-pressure water is sprayed to the contaminated soil, the pressure of dissolved oxygen becomes low with the high-pressure water, bubbles which can be hollow bubbles are generated, and thereafter, the bubbles instantaneously collapse to generate impact energy, whereby the contaminated material on the contaminated soil surface is peeled off.
As shown in fig. 5, the shearing stress and the vertical stress together produce an effect of grinding (attrition) and decomposing (distriction), so that the contaminated material adhering to the contaminated soil can be peeled off.
No cavity bubbles are generated in the first collision zone B, and turbulence is formed due to the change in pressure, so that collisions are generated between the contaminated soil particles, so that contaminants adhered between the particles can be peeled off.
After passing through the second collision section C, the secondary pollution material is peeled off by collision with the collision member 320 formed at the end.
In the second collision zone C, the volatilized contaminant is discharged to the outside, and the contaminated soil from which the contaminant is removed is discharged to the contaminated soil separation unit 400.
For this purpose, the cleaning section 300 includes a collection port 330 and a cleaning discharge port 340.
The trapping port 330 is formed at an upper portion of the outlet side of the second collision section C, and may form a trapping path for trapping a contaminant gas that may be generated and volatilized during the process of contaminant stripping when the contaminant is a volatile contaminant due to the rupture of cavitation.
The purge outlet 340 is formed at the lower portion of the outlet side of the second collision zone C, and forms a discharge path for discharging the contaminated soil.
As described above, the washing slurry discharged through the washing discharge port 340 moves to the contaminated soil separating part 400 so as to be separated according to the particle size and purified into purified soil.
Meanwhile, as described above, the cleaning unit 300 may further include the ultrasonic vibrator 310 to generate more cavity bubbles in the process of detaching and peeling the contaminant by breaking the cavity bubbles.
That is, the ultrasonic vibrator 310 is provided in the first collision section B, and generates acoustic cavitation in the same manner as the ultrasonic vibrator 170 of the input screening unit 100, so that a cavity bubble is generated in the first collision section B, and more contaminants are effectively peeled off in the second collision section C together with collision energy generated at the time of collision based on the structure of the collision member 320.
On the other hand, the contaminated soil separator 400 separates the contaminated soil peeled from the contaminated soil while stirring the contaminated soil discharged from the washing unit 300, and selectively discharges only the purified soil to the discharge unit 500.
For this purpose, as shown in fig. 6, the contaminated soil separation section 400 includes a soil sedimentation member 410, a waste water discharge member 420, and a contaminated gas discharge member 430.
The soil settling member 410 allows contaminated soil, which is discharged from the cleaning unit 300 and has been stripped of contaminants, to flow in, and includes a stirrer 412 therein, and discharges the contaminated soil having a particle size equal to or greater than a predetermined interval to the discharge unit 500.
That is, in the case of the wastewater containing fine contaminated particles and contaminated soil discharged from the washing unit 300, the soil is settled in the soil settlement means 410 and discharged to the discharge unit 500, and at this time, the contaminated soil particle size is set based on a range of 0.075mm to 0.15mm, the contaminated soil having a particle size less than the above range is discharged to the wastewater discharge means 420, and the contaminated soil having a particle size more than the above range is naturally settled and discharged to the discharge unit 500.
For this purpose, the waste water discharging part 420 is connected to one side of the soil settling part 410, and contaminated soil of which particle size is regulated by the operation of the stirrer 412, that is, less than 0.075mm, is discharged to the outside of the soil settling part 410.
Further, contaminated soil containing contaminants including volatile substances may be discharged through the contaminated gas discharge part 430. Further, a contaminated gas discharging part 430 is connected to the other side of the soil settling part 410, and sucks and discharges the contaminated gas in the soil settling part 410 to collect volatilized contaminants generated during the operation of the stirrer 412.
As shown in fig. 7, the contaminated gas exhaust component 430 may include a main body 432, a turbo blower 434, and activated carbon 436.
The main body 432 has a suction port 432a for moving the polluted gas existing in the soil settlement member 410 through the connection pipe 432b, and the main body 432 may have a box shape having a predetermined internal space in order to trap the polluted gas.
The turbo blower 434 is provided inside the main body 432, and the contaminated gas inside the soil settlement member 410 flows into the main body 423 through the suction port 432a as the motor M is driven.
The activated carbon 436 is used to purify the contaminated gas flowing into the main body 432 through the turbo blower 434, and the plurality of activated carbons 436 are provided in a layer-forming manner, so that the contaminated gas flowing into the main body 423 through the turbo blower 434 is purified through the inside, thereby effectively treating the contaminated gas generated when the contaminated soil is washed.
Here, although the activated carbon 436 is illustrated as being composed of two layers, it is not limited thereto, and more activated carbon 436 layers may be disposed in the vertical direction, thereby more effectively treating the polluted gas.
On the other hand, the contaminated soil separation portion 400 may further include a micro bubble generator 440.
A plurality of fine bubble generators 440 (refer to fig. 6) are provided on the lower inclined surface of the soil settling member 410, the lower inclined surface having a narrowed diameter, and fine bubbles are supplied to the surface of the contaminated soil to be stirred, thereby effectively floating the fine soil, and preventing the fine soil concentrated by the contamination from being discharged to the purified soil.
The fine bubble generator 440 is used to artificially adjust the particle size of the contaminated soil in the soil settling member 410 together with the agitator 412, and the contaminated soil adjusted to 0.075mm or less by the particle size adjustment as described above is discharged by the waste water discharging member 420, and the contaminated soil between 0.075mm and 0.15mm is discharged to the washing unit 300 for recovery by additional washing.
The discharging part 500 transfers the purified soil discharged from the contaminated soil separating part 400 along the discharging path.
The discharge unit (500) may have the same structure as the transfer unit (200) provided with the transfer screw (210), and may be provided with another nanobubble jet member (510) as shown in fig. 5, and the purge soil may be additionally washed before being discharged through the purge soil discharge port (502).
Accordingly, the discharge unit 500 finally cleans the end portion thereof to discharge the purified soil, and thus the contaminated soil can be economically treated by screening, cleaning, separation, purification, and the like, and finally the contaminated soil can be effectively reused.
A purified soil dehydrating device 520 for dehydrating the discharged purified soil may be provided below the portion where the discharge portion 500 is formed. The purified soil dewatering device 520 can dewater water mixed with purified soil which is finely left by falling purified soil discharged from above.
In this case, the purified soil dehydrating device 520 may be provided with a dehydrating member (not shown) for vibrating the inside, so that the moisture of the purified soil can be removed by the vibration of the dehydrating member (not shown).
Accordingly, the purified soil dehydration device 520 dehydrates the water remaining in the purified soil, and thereby can remove the pollutants possibly contained in the water, and can improve the purification efficiency of the purified soil, and can improve the quality of the purified soil.
That is, the purified soil dewatering device 520 is provided with a water treatment for precipitating fine particles existing in the wastewater to reuse the wastewater as process water and a sludge dewatering unit for dewatering the fine particles precipitated in the water treatment, so that the process water can be reused while dewatering the water.
And, a final dehydrating apparatus that finally dehydrates the discharged purified sand to remove the pollutants existing in the wastewater may be provided, thereby improving the purification efficiency, and thus the purification efficiency of the contaminated sand may be improved.
Fig. 8 is a view showing a magnetic force screening part of a module type washing apparatus for soil purification according to an embodiment of the present invention.
Referring to fig. 8, the magnetic force screening part 600 may be connected to the washing discharge port 340 of the washing part 300 so that soil purified from above may flow in and be discharged downward. The magnetic force screening unit 600 can magnetically sort the contaminated materials that are magnetically bound to Fe in the purified soil, thereby improving the quality of the purified soil.
The magnetic force screening unit 600 may include a cylindrical magnetic member 620 for adhering mineral-like contaminated soil in an Fe-bonded form contained in the purified soil flowing in, and may be configured such that 1/2 area of the cylinder is magnetic and 1/2 area is non-magnetic, so that the adhering mineral-like contaminated soil is smoothly discharged by the rotation of the cylinder and the magnetic scraper 622, and a driving member for providing a driving force to rotate the cylinder.
The magnetic force screening unit 600 may include a magnetic force main body 610, a cylindrical magnetic member 620, and a driving member 630, so that, when the inflow purified soil is discharged, the Fe-bonded type pollutant and the non-Fe-bonded type pollutant in the mineral-like pollution, from which the pollutant cannot be removed only by surface peeling of the soil, are effectively separated, thereby improving the purification quality.
The magnetic body 610 may be formed in a quadrangular section. Also, a hollow part may be formed inside the magnetic body 610. The upper portion may be connected to the purge outlet 340 of the purge unit 300, and thus the purge soil may flow in.
At this time, the magnetic body 610 may include a guide member 611 and a non-magnetic discharge port 612 therein, and the guide member 611 and the non-magnetic discharge port 612 move the purified soil so that the purified soil flows into and adheres to the mineral-like contaminated soil in the form of Fe-binding contained in the purified soil and is discharged.
The guide member 611 may be formed in a plate shape. Also, the guide member 611 may be formed to extend from the left side to the right side of the magnetic body 610. In this case, the plurality of guide members 611 may be spaced apart from each other. The initial guide member 611 is provided below the inflow purified soil, and moves the inflow purified soil to the right.
Further, a second guide member 611 spaced apart from the initial guide member 611 may be installed below the initial guide member 611. At this time, the second guide member 611 may be coupled to the inner side surface of the magnetic body 610 and extend in the left direction.
That is, the guide member 611 can guide the inflow purified soil to move left and right. In this case, a non-magnetic discharge port 612 is provided at the lower end of the magnetic body 610, so that the purified soil from which the foreign matter of the metal material is separated can be discharged downward. Further, a cylindrical magnetic member 620 may be coupled to an end of the guide member 611.
The cylindrical magnetic member 620 may be provided with a cylindrical magnet 621 having a magnetic force on the central axis, and may be separated from mineral contaminated soil contained in the purified soil in an Fe-bonded form, which may be mixed with the purified soil.
The cylindrical magnetic member 620 has one surface that is magnetic and the other surface that is non-magnetic, and mineral-like contaminated soil in a bonded form is attached to the portion having magnetism, so that the mineral-like contaminated soil can be discharged to the outside by the rotation of the cylindrical magnetic member 620.
Further, a magnetic blade 622 may be provided at one side of the cylindrical magnetic member 620 to be spaced apart from the cylindrical magnetic member 620.
The magnetic scraper 622 may downwardly separate mineral-like contaminated soil attached to the cylindrical magnet 621. At this time, the separated foreign matters of the metal material may be discharged through the magnetic discharge port 623 formed at the lower end portion of the magnetic body 610.
The driving member 630 may be connected with the guide member 611 extending to the magnetic discharge port 623. Further, the driving part 630 may be moved leftward or rightward, thereby changing the angle of the plurality of guide parts 611. Thereby, contaminated soil on the minerals can be discharged through the magnetic discharge outlet 623.
The invention has the following effects: the processes of screening, transferring, cleaning, separating, etc. are continuously performed by using a plurality of structures for modularizing contaminated soil charged into the hopper, thereby improving cleaning efficiency for removing foreign matters or contaminated materials, and on the other hand, the ratio of contaminated soil and water is applied to be less than 1:2, using only a washing solvent or water at a level not requiring neutralization as a washing liquid, reducing the amount of chemicals used, the waste liquid treatment and the water treatment capacity, and providing a physical treatment technique which is free from problems in soil health.
When the contaminated soil is purified by the nanobubble generating device, the water generating nanobubbles is used for all the water used, so that the purification efficiency of the contaminated soil can be improved and the purification efficiency of the fine attached fine contaminants can be improved.
The invention has the following effects: since a plurality of structures are modularized into one device, the apparatus can be simplified, and thus, the apparatus can be used simply in a mobile manner, and if necessary, additional apparatus such as magnetic screening and floating screening can be selectively applied simply to the modularized apparatus.
The present invention has an effect that when contaminated soil containing high-speed high-pressure water passes through a sharp diameter change section while first stripping of the contaminated material is achieved by injecting high-pressure water and increasing the flow rate, hydraulic pressure is reduced, at this time, stripping of the contaminated material is achieved by impact energy applied to the surface of the contaminated soil due to the collapse of the generated cavity bubbles, and then second stripping is achieved by impact force of collision between the contaminated soil particles due to turbulence generated in the pressure release section, and second stripping is achieved by impact force of collision with the collision plate at the end, thereby achieving effective stripping only by a simple physical treatment process.
In the process of screening and transferring, the invention peels off the pollutant in advance through the nano bubble water.
The invention has the following effects: while the first stripping of the contaminated material is achieved by spraying high pressure water and increasing the flow rate, the contaminated soil containing water is depressurized, and the second stripping is achieved by the impact applied to the surface of the contaminated soil by the collapse of the hollow bubbles thus generated, thereby achieving effective stripping only through a simple physical treatment process.
Thus, the present invention can perform a wide range of treatments without limiting the types and characteristics of contaminated materials, thereby expanding the versatility of the device application, and can remove the contaminated materials only by pure water without using additional chemicals, so that the washing water can be easily reused, thereby having an effect of enabling an economical treatment.
While the present invention has been described above with reference to the embodiments shown in the drawings, this is merely an example, and those skilled in the art to which the present invention pertains can make various modifications thereto, and it is understood that all or part of the above-described embodiments may be selectively combined. Therefore, the true technical scope of the present invention should be determined by the technical ideas of the appended claims.

Claims (7)

1. A modular cleaning device for soil purification comprising:
a loading screening unit for cleaning and screening the loaded contaminated soil;
a transfer unit that transfers the contaminated soil discharged from the input screening unit;
a cleaning part for spraying high-pressure water to the polluted soil transferred along the transfer path of the transfer part and stripping the polluted substances of the polluted soil;
A contaminated soil separation unit for stirring the contaminated soil discharged from the washing unit, separating the contaminated material peeled from the contaminated soil from the purified soil, and selectively discharging only the purified soil; and
a discharge unit for transferring the purified soil discharged from the contaminated soil separation unit along a discharge path,
the input screening unit includes:
a vibration hopper forming a contaminated soil throwing path and gradually narrowing from the upper part to the lower part;
a body connected to the vibration hopper, one end portion being disposed higher than the other end portion so as to move contaminated soil discharged from the vibration hopper;
a screening screen provided inside the body for screening contaminated soil having a particle size smaller than a predetermined particle size;
a nanobubble jet member provided in plural toward the screen mesh, for jetting water to contaminated soil to induce nanobubble-based pre-peeling; and
an ultrasonic vibrator that generates acoustic cavitation to contaminated soil moving on the screen mesh and peels off a contaminant in advance by utilizing impact energy generated when bubbles are broken,
the nanobubble jet member includes a vertical jet member for jetting water in a vertical direction and a horizontal jet member for jetting water in a horizontal direction to prevent foreign substances from being laminated on the body,
The transfer part enables the nano bubble water and the polluted soil to be peeled and transferred in advance towards the polluted soil of the cleaning part by a transfer screw rod arranged on a moving path,
the nanobubble jet member jets water 2 times or less of contaminated soil put into the body, and can inject nanobubble water.
2. A modular cleaning apparatus for soil cleaning according to claim 1, wherein,
the cleaning part includes:
a surface peeling section formed by reducing the diameter of the inlet side, for generating a cavity bubble for the contaminated soil discharged from the transfer section, peeling the contaminated soil from the contaminated soil by impact energy generated during generation and rupture of the cavity bubble, and generating shear stress and vertical stress by high-speed high-pressure water flow, thereby peeling the contaminated soil;
a first collision section formed by expanding the inner diameter of the end of the surface peeling section, wherein the fluid passing through the surface peeling section generates turbulence due to pressure change, and collisions between particles occur; and
and a second collision section for causing the contaminated soil to collide with the collision member after passing through the first collision section, thereby further stripping the contaminants.
3. A modular cleaning apparatus for soil cleaning as claimed in claim 2, wherein,
the cleaning part further comprises an ultrasonic vibrator which is arranged in the first collision zone and is used for generating acoustic cavitation so as to additionally strip pollutants by utilizing impact energy generated when bubbles break.
4. A modular cleaning apparatus for soil cleaning according to claim 1, wherein,
the contaminated soil separation section includes:
a soil sedimentation member for flowing in the contaminated soil discharged from the washing unit, the soil sedimentation member including a stirrer for discharging the contaminated soil having a particle size equal to or greater than a predetermined interval;
a waste water discharging member connected to one side of the soil settling member for discharging waste water contained in contaminated soil flowing into the soil settling member; and
and a polluted gas discharge part connected to the other side of the soil settlement part for sucking and discharging polluted gas of the soil settlement part.
5. A modular cleaning apparatus for soil cleaning as claimed in claim 4, wherein,
the contaminated soil separation section further includes a fine bubble generator provided at a lower inclined surface of which the diameter is narrowed in the inside of the soil settlement member, to supply fine bubbles to the contaminated soil surface.
6. A modular cleaning apparatus for soil cleaning as claimed in claim 4, wherein,
the contaminated gas exhaust member includes:
a main body having a suction inlet for moving the polluted gas of the soil settlement member;
a turbo blower installed inside the main body and allowing a contaminated gas to flow into the main body through the suction port; and
activated carbon that purifies the polluted gas flowing into the main body through the turbo blower.
7. A modular cleaning apparatus for soil cleaning according to claim 1, wherein,
the magnetic force screening part is provided with:
a magnetic body having one end connected to the washing unit, allowing purified soil to flow in, and provided with a guide member for guiding movement of the purified soil, and attached with a mineral-like contaminant having magnetism contained in the purified soil guided by the guide member;
a cylindrical magnetic member provided at an end of the guide member, for separating metal contained in the purified soil flowing into the guide member, and storing the separated metal; and
and a driving member provided on an outer side surface of the guide member, for changing an angle of the guide member to provide a driving force to discharge the mineral-like contaminant having magnetism separated by the cylindrical magnetic member through the magnetic discharge port.
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