KR102389010B1 - Heavy metal-contaminated soil complex treatment system using high magnetic - Google Patents

Abstract

The present invention relates to a heavy metal contaminated soil complex treatment system using high magnetic force, comprising: a magnetic separator for receiving contaminated soil to be purified, selecting and removing metallic materials from the contaminated soil introduced in a magnetic way, and storing and discharging the sorted soil from which metallic materials are removed; a storage hopper for receiving and storing sorted soil discharged from the magnetic separator; a first wet sorting device for separating and discharging sorted soil discharged from the storage hopper, washing the supplied sorted soil by spraying washing water, and separating and discharging soil having a first particle size or less from the sorted soil; first cyclone for receiving the soil which is smaller than the first particle size and separated and discharged from the first wet separator and separating and discharging fine soil which is smaller than a second particle size which is relatively smaller than the first particle size; grit tank for receiving the fine soil separated and discharged from the first cyclone, settling the fine soil to a bottom by gravity, and discharging floating soil which has not been settled; a coagulation sedimentation tank for receiving floating soil discharged from the grit tank, introducing a coagulant to settle coagulated sediment from the floating soil to the bottom; a thickening tank connected to a discharge end of the grit tank and coagulation sedimentation tank, receiving sediments respectively settled in the grit tank and coagulation sediment tank, storing the same to produce gravity-separated concentrated sludge, and discharging the concentrated sludge; and a filter press for receiving the concentrated sludge discharged from the thickening tank and dewatering the concentrated sludge to produce and discharge a dehydrated cake.

Description

Heavy metal-contaminated soil complex treatment system using high magnetic

The present invention improves purification efficiency by arranging a magnetic separator, a first wet sorting device, a first cyclone, a second wet sorting device, and a second cyclone, and refining the contaminated soil to be purified through sequential sorting and particle size separation thereof. It relates to a complex treatment system for heavy metal contaminated soil using improved high magnetic force.

Recently, the seriousness of soil and groundwater contamination due to wastes and hazardous chemicals generated due to population growth and industrial development around the world has increased, and the importance of the soil environment, which is affected by development projects, is emerging.

Heavy metals in the soil are not decomposed, but are adsorbed, solidified, or re-eluted according to changes in the physical and chemical environment, causing contamination to spread.

If the amount of metal accumulated in the soil increases, it can act as a risk factor that interferes with the enzyme activity of plants or microorganisms. When metal contaminants flow in through groundwater, they adversely affect various living organisms that use groundwater, and when absorbed into plant tissues, ultimately harm humans through the food chain.

Contamination forms due to heavy metals can be divided into exchange forms, carbonate forms, forms adsorbed to iron oxide or manganese oxide, forms bound to organic matter or sulfur, and residual forms.

As methods for purifying contaminated soil, there are soil washing and electrokinetic extraction methods. These technologies are difficult to remove heavy metals in organic or sulfur-bound and persistent forms. However, the use of strong acid has a problem of causing secondary pollution such as corrosion of washing equipment, wastewater treatment problems, and soil acidification.

In addition, when the metal component is very strongly bound to the soil particles only by the conventional soil washing technique, when the density and surface characteristics of the soil containing the metal component and the soil without the metal component are not clearly distinguished, the washing is caused by the various chemical properties of heavy metals When the technology is difficult to apply, when heavy metals are combined with soil particles of various sizes, when the silt/clay content exceeds 30-50% or in the case of a soil with a high humic content, organic matter with high viscosity is added to the soil There was a problem in that it was difficult to effectively remove the contaminants adsorbed to the soil, such as when it is contained.

In particular, the conventional soil washing technology has a characteristic that the purification efficiency is low when the applied soil contains a large amount of fine soil, which is due to the characteristics of fine soil having a high specific surface area and a large amount of adsorption sites. Since organic and inorganic pollutants are more strongly adsorbed compared to other cases, it is difficult to desorb through the purification method, so the installation cost is high in terms of economy, eco-friendliness, workability, and safety of the purification system, and lots of site installation sites for the purification system are secured There is a problem that must be addressed.

Korean Patent Registration No. 10-847058

Therefore, the present invention has been devised to solve the above problems, and while controlling the excessive use of the oxidizing agent, a plurality of screening means are linked and arranged prior to the precipitation treatment process, and the contaminated soil to be purified through sequential selection and particle size separation thereof An object of the present invention is to provide a complex treatment system for heavy metal contaminated soil using high magnetic force that can further improve purification efficiency by refining the soil.

As a means for solving the above-mentioned problems, the complex treatment system for heavy metal contaminated soil using high magnetic force of the present invention (hereinafter referred to as "system of the present invention") is from the contaminated soil introduced in a magnetic way into which the contaminated soil to be purified is introduced. a magnetic separator for sorting and removing metallic substances, and storing and discharging the sorted soil from which metallic substances are removed; a storage hopper in which the sorted soil discharged from the magnetic separator is introduced and stored; a first wet sorting device for separating and discharging the sorted soil discharged from the storage hopper by separating and discharging the sorted soil that is smaller than a first particle size from the sorted soil while washing the supplied sorted soil by injecting washing water; a first cyclone for separating and discharging the soil of a first particle size or less, separated and discharged from the first wet sorting device, and separating and discharging fine soil with a size of a second particle diameter or less that is relatively smaller than the first particle diameter; a sedimentation tank in which fine soil separated and discharged from the first cyclone is introduced, the fine soil is gravity sedimented to the bottom, and the unsettled floating soil is discharged; a coagulation sedimentation tank in which the suspended soil discharged from the sedimentation tank is introduced, and a coagulant is input to cause the sediment to be aggregated from the floating soil and sediment to the bottom; a thickening tank connected to the discharge ends of the sedimentation tank and the coagulation and settling tank, the sediments treated respectively in the sedimentation tank and the coagulation and settling tank are introduced, and the sediment is stored thereto to generate gravity-separated concentrated sludge and to discharge the generated concentrated sludge; and a filter press in which the concentrated sludge discharged from the thickener is introduced, and the concentrated sludge is dehydrated to produce and discharge a dewatering cake.

As an example, the magnetic separator has an input space in which an inlet through which the contaminated soil is input is provided at the upper end and incision holes are formed along the longitudinal direction on both sides of the lower end, and has magnetic force and the outer periphery is in the incision hole of each input space. It is characterized in that it comprises a pair of sorting drums installed so as to be adjacent and rotatable, and a first hopper that communicates with the cut-out hole at the lower part of the input space and stores the sorted soil from which the metallic material has been removed through the cut-out hole.

As an example, the input space further includes a distribution block that is installed to protrude toward the top while crossing the center of the inlet to separate and partition the space, and the bottom surfaces of both spaces partitioned by the distribution block are It is characterized in that a downward inclination gradient is formed toward each incision hole.

As an example, the magnetic separator includes a fixing plate that is fixedly installed at a position spaced apart from the bottom of the input space, and one or more elastic springs connected in a vertical direction between the upper surface of the fixing plate and the bottom of the input space. It is characterized by inclusion.

As an example, the magnetic separator includes a scraper with a downward slope and one end installed so as to be in close contact with the outer periphery of the sorting drum at a position opposite to the rotational direction of each sorting drum, an opening is formed in the upper part, and the other end of the scraper It is characterized in that it further comprises a second hopper installed to be soft to the opening.

As an example, the storage hopper has a body having a storage space formed therein and an opening/closing means provided at the lower portion, and a curved plate shape with a flat cross-section curved inwardly in the longitudinal direction at each corner of the inner periphery of the body. It is characterized in that it includes a corner guide plate to be mounted along.

As an example, fine soil below the second particle size provided at the rear end of the first cyclone and separated and discharged from the first cyclone is introduced, and washing water is sprayed to wash the introduced fine soil below the second particle size. a second wet sorting device for separating and discharging fine soil smaller than or equal to a third particle diameter, which is relatively smaller than the second particle diameter; and fine soil having a size less than or equal to a third particle size provided between the rear end of the second wet sorting device and the front end of the sedimentation tank and separated and discharged from the second wet sorting device, and a fourth particle size relatively smaller than the third particle size It is characterized by further comprising; a second cyclone that sorts the fine soil below, separates and discharges it, and causes it to flow into the sedimentation tank.

As an example, the coagulation sedimentation tank may include: a treatment tank in which the floating soil discharged from the sedimentation tank is introduced, and the treated water including the introduced floating soil and soil is maintained up to a preset water level; a transfer blower installed to blow air from one side of the treatment tank toward the water surface so that the floating material floating from the treated water is moved in the other direction; and a scum tank which is provided to have an independent accommodation space in the inner space of the treatment tank and is installed on the other side of the treatment tank and into which floating substances moving on the water surface by the transfer blower are introduced.

As an example, the side wall constituting the accommodation space of the scum tank is installed relatively higher than the water surface of the treatment tank, and the floating material is introduced by an inclined conveyor installed to have an upward slope from the water surface of the treatment tank. am.

As an example, the inclined conveyor includes a flat portion installed in water so as to be adjacent to the water surface of the treatment tank while forming a plane, and the other end of the flat portion is installed to have an upward inclination, and the end is the upper end of the side wall of one side of the scum tank It is characterized in that it comprises a conveying belt which is installed to surround the inclined portion and the flat portion and the inclined portion installed to be located in the orbital movement and a plurality of first through-holes are formed.

As an example, the inclined conveyor is installed adjacent to the end of the inclined part at the upper end of one side wall of the scum tank, a plurality of brush members are mounted radially along the outer periphery, and the direction opposite to the orbital movement direction of the conveying belt It is characterized in that it further includes a tally drum that rotates to allow the floating substances attached to the transfer belt to be detached.

As an example, from both sides of the planar part to one side of the treatment tank, the separation distance is increased from each other, and the ends are attached to both inner walls of the treatment tank, respectively, and a part of the upper part is exposed above the water surface of the treatment tank It is characterized by further comprising; a pair of guide bulkheads to be installed.

As an example, the scum tank may include a cover plate having one end bent toward the accommodation space while extending upward along the longitudinal direction of the other side wall, and a plurality of second through holes formed in the cover plate. am.

As an example, the inclined conveyor includes a transfer belt having a plurality of first through holes formed therein, and an oil absorption pad is mounted along an outer periphery of the transfer belt as an upper portion of the scum tank, and the orbital movement of the transfer belt An oil tally drum is configured to rotate in the opposite direction to the oil attached to the transfer belt to adsorb oil, and a plurality of brush members are mounted radially along the outer periphery on the lower portion of the transfer belt as the upper portion of the scum tank, and the transfer It is characterized in that it further comprises a tally drum for allowing the brush member to be inserted into the first through hole while rotating in the direction opposite to the orbital motion direction of the belt so that the floating material attached to the conveyance belt is detached.

As an example, the oil removal drum is characterized in that it further comprises a support mounted on the shaft and a removal plate mounted on the support to desorb the oil adsorbed from the oil absorption pad.

As described above, in the system of the present invention, a plurality of sorting means such as a magnetic separator, a first wet sorting device, a first cyclone, a second wet sorting device, and a second cyclone are connected and arranged prior to the sedimentation process and their sequential arrangement By refining contaminated soil to be purified through phosphorus selection and particle size separation, purification efficiency is further improved, and environmental problems can be solved by controlling excessive use of oxidizing agents.

In addition, the system of the present invention, in treating the scum generated during the sedimentation process by the coagulation settling tank, prevents the retrograde of the scum possessed by the conventional scum removal means using a mechanical blade and induces a normal treatment direction while preventing the side-crowding phenomenon of the scum This has the effect of further increasing the scum removal efficiency.

1 is a block diagram illustrating a system of the present invention;
Figure 2 is a side cross-sectional view showing a magnetic separator according to an embodiment of the present invention.
3 is a view showing an input space according to an embodiment of the present invention.
Figure 4 is a perspective view showing a storage hopper according to an embodiment of the present invention.
5 is a side cross-sectional view showing a coagulation sedimentation tank according to an embodiment of the present invention.
6 is a side cross-sectional view showing the inclined conveyor of the coagulation sedimentation tank according to an embodiment of the present invention.
7 is a plan view illustrating an induction partition wall of a coagulation sedimentation tank according to an embodiment of the present invention.
8 is an operational state diagram of a coagulation sedimentation tank according to 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 the present 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. It should be interpreted as meaning and concept consistent with the technical idea of

1, the system of the present invention includes a magnetic separator (1), a storage hopper (2), a first wet sorting device (3), a first cyclone (4), a sedimentation tank (7), and agglomeration It includes a settling tank (8), a thickening tank (9) and a filter press (9-1).

The magnetic separator 1 selects and removes metallic materials such as iron oxides from the contaminated soil to be purified and magnetically introduced into the contaminated soil, and stores and discharges the selected soil from which the metallic material is removed.

According to an embodiment of the present invention, the magnetic separator 1 is provided with an inlet 630 through which contaminated soil is put at the upper end as shown in FIG. 2, and cut-out holes 640 along the longitudinal direction on both sides of the lower end. This formed input space, a pair of sorting drums 70 that have magnetic force and are installed so that the outer periphery is rotatably adjacent to the cut-out hole 640 of each input space, and the cut-out hole 640 in the lower part of the input space. It has an internal space 600 communicating with it and includes a first hopper 60 in which the sorted soil from which the metallic material has been removed through the cut-out 640 is stored.

The input space includes a bottom plate 610 installed on the upper portion of the inner space 600 of the first hopper 60 and a pair of side plates 620 installed at both ends of the bottom plate 610 to be spaced apart from each other in the longitudinal direction. It can be configured, and accordingly, an incision hole 640 is formed between the bottom plate 610 and each side plate 620, and the contaminated soil moving along the bottom plate 610 passes and falls through the incision hole 640. It is accommodated in the inner space 600 of the first hopper 60 .

The first hopper 60 is provided with an outlet 61 to selectively discharge the sorted soil accommodated in the inner space 600 .

The sorting drum 70 is rotatably installed adjacent to the incision hole 640 , and by providing magnetic force, the metal material contained in the contaminated soil passes through the incision hole 640 . As it adheres to the soil, it selects and removes metallic substances from the contaminated soil.

The sorting drum 70 may have a conventional cylindrical drum structure, and is disposed in parallel along the longitudinal direction of the cut-out hole 640 and rotates in one direction by transmitting a rotational force applied from the outside.

The selection drum 70 can select one suitable from a variety of known materials or methods for providing magnetic force such as a permanent magnet or an electromagnet, and a detailed description thereof will be omitted.

The input space may further include a distribution block 650 that is installed to protrude toward the top while crossing the center of the inlet 630 to separate and partition the space.

The distribution block 650 divides the inlet 630 into two halves based on the center as well as the space so that the contaminated soil input from the upper portion can be distributed and introduced into the cut-out holes 640 respectively formed on both lower sides of the input space.

Here, it is preferable that the bottom surface of both spaces partitioned by the distribution block 650, that is, the bottom plate 610, has a downward inclination gradient toward each incision hole 640. By this inclination gradient, it is possible to induce the contaminated soil input into the input space to naturally move toward the incision hole 640 .

On the other hand, the magnetic separator 1 according to this embodiment is a fixed plate 660 that is fixedly installed at a position spaced apart from the bottom of the input space, that is, the bottom of the bottom plate 610, as shown in FIG. 3, and the fixing plate ( It may further include one or more elastic springs 670 connected in the vertical direction between the upper surface of the 660 and the bottom surface of the bottom plate (610).

That is, the input space is connected through the fixed plate 660 and the elastic spring 670 installed spaced apart from the lower portion so that it can flow in the up and down directions. By continuously acting elastically, the contaminated soil input more effectively can be moved toward the incision hole 640 .

At this time, the input space may be provided with a guide structure that may not flow in the left/right front/rear direction while promoting a stable vertical direction, and the distribution block 650 has a cross-sectional width as shown in FIG. This is configured to be narrow, and by forming inclined surfaces in both separated and partitioned spaces, it is preferable that the input contaminated soil is not accumulated in each space and can be easily guided to the incision hole 640 side along the inclined surface.

And the magnetic separator 1 has a downward inclination and one end of the scraper 700 installed so as to be in close contact with the outer periphery of the sorting drum 70 at a position opposite to the rotational direction of each sorting drum 70, and an inner space ( 800), an opening is formed in the upper portion, and the second hopper 80 is installed so that the other end of the scraper 700 is connected to the opening may be further included.

Accordingly, in the process of rotating the sorting drum 70, the scraper 700 peels off the metallic material attached to the outer periphery of the sorting drum 70, and at the same time, the peeled metallic material is removed from the inner space of the second hopper 80 It can be dropped and accommodated at 800, and the metallic material separated and accommodated in the second hopper 80 by the scraper 700 in this way can be recycled through a separate treatment process.

The storage hopper (2) can control the amount of purification treatment of contaminated soil by discharging a predetermined amount of sorted soil and the sorted soil selected and discharged from the magnetic separator (1) is input and stored.

The storage hopper (2) includes a body (2-2) having a storage space (2-1) formed therein and an opening/closing means (2-3) provided at the bottom, and temporarily stores and sorts the inputted sorted soil. It is possible to selectively discharge soil.

Here, since the general hopper structure has a rectangular storage space 2-1, when vomit containing moisture is frozen in winter, it is structurally easy to fix the frozen vomit at the corner of the storage space 2-1. .

Accordingly, as shown in FIG. 4, the storage hopper 2 according to an embodiment of the present invention has a curved plate shape with a flat cross-section inwardly curved in the longitudinal direction at each corner of the inner periphery of the body 2-2. By further including a corner guide plate 2-4 to be mounted along, the input sorted soil induces a natural lower movement along the curved surface of the corner guide plate 1-4.

In particular, even in winter when the soil is frozen, each corner of the inner periphery of the body 2-2 has a curved shape by the corner guide plate 2-4. this becomes possible

The first wet sorting device 3 is connected to the rear end of the storage hopper 2 and the sorted soil discharged from the storage hopper 2 flows in. Although not shown in the drawing, the first wet sorting device 3 is provided with at least one sorting net, and vibration is applied to the sorting net to separate sorted soil based on the size of a predetermined particle diameter set and separated. The selected soil is washed and discharged.

That is, the first wet sorting device 3 is provided with a plurality of injection nozzles inside, so that washing water is sprayed at the same time as the inflow of sorted soil or with a time difference to wash the supplied sorted soil, the first particle size of the sorted soil or less The soil is separated and discharged.

In this case, the first particle size may be 2 to 3 mm, and soil having a size greater than or equal to the first particle size may be separated and discharged as washing soil and subjected to a separate treatment process.

And the washing water sprayed from the first wet sorting device 3 may be supplied from the washing water tank 8-1 to be described below.

The first cyclone 4 introduces soil having a size of a first particle size or less separated and discharged from the first wet sorting device 3, and selects fine soil less than or equal to a second particle size that is relatively smaller than the first particle size. separate discharge.

The first cyclone 4 performs a particle size separation process by specific gravity difference in the introduced soil, and the structure and operation mechanism of the first cyclone 4 can be applied to various known technologies. is omitted.

In the sedimentation tank 7, the fine soil separated and discharged from the first cyclone 4, that is, the fine soil of the second particle size or less, and the washing water used in the first wet sorting device 3, etc. are introduced, and a preset time During the retention treatment, the fine soil is gravity-settled to the bottom to separate it from the washing water.

And the sedimentation tank 7 separates and discharges the sedimented fine soil and the non-settled floating soil through the above process. In the case of non-floating soil, that is, relatively fine soil having a smaller specific gravity or particle size, it is supplied to the coagulation sedimentation tank 8 for post-treatment.

In the coagulation and sedimentation tank 8, the suspended soil and supernatant discharged from the sedimentation tank 7 are introduced together, and the coagulant is inputted from the outside, and the sediment coagulated by the coagulant from the floating soil and sand by the retention treatment for a preset time is at the bottom. to precipitate as

Here, the coagulant may use an inorganic electrolyte or an organic polymer compound as a material for sedimentation by causing solid particles suspended in a liquid to coagulate with each other, but the present invention is not limited thereto. It is of course possible to

In addition, the coagulation and precipitation tank 8 may receive a certain amount of treated water for sedimentation treatment of the introduced suspended soil, wherein the treated water is supplemented by supernatant water introduced together with the floating soil or a separate external surface. It may be the inflow of water.

The sediment to be treated in the coagulation and sedimentation tank 8 may be introduced into the thickening tank 9 connected to the rear end like the sedimentation tank 7 , and concentrated in the thickening tank 9 and discharged.

The thickening tank 9 is connected to the discharge ends of the sedimentation tank 7 and the coagulation settling tank 8, so that the fine soil and sediment treated in the sedimentation tank 7 and the coagulation settling tank 8, respectively, are introduced and stored therein. to produce a gravity-separated thickened sludge and discharge the produced thickened sludge.

The filter press 9-1 is connected to the rear end of the thickening tank 9, and the concentrated sludge discharged from the thickening tank 9 is introduced. The filter press 9-1 applies a pneumatic or hydraulic press method to compress the introduced concentrated sludge, and through this dewatering treatment, it is generated and discharged as a dewatered cake, and the discharged dewatered cake is a separate dewatering cake treatment facility. can be transferred to

On the other hand, the system of the present invention provides a configuration that allows the purification efficiency to be doubled by further refining the sorted soil by repeatedly performing particle size separation on the sorted soil from which the metallic material has been removed through the magnetic separator (1) in advance. there is.

For example, in the system of the present invention, fine soil having a particle size of less than or equal to the second particle size discharged from the first cyclone 4 is separated again by particle size provided at the rear end of the first cyclone 4 and the front end of the sedimentation tank 7 , and the It may further include a second wet sorting device (5) and a second cyclone (6) for supplying to the sedimentation tank (7).

The second wet sorting device (5) is provided at the rear end of the first cyclone (4), and fine soil having a size smaller than the second particle size separated and discharged from the first cyclone (4) is introduced, and washing water is sprayed and introduced While washing the fine soil of the second particle size or smaller, the fine soil smaller than the third particle size is selected and discharged separately.

The second wet sorting device 5 may have the same sorting structure as the above-described first wet sorting device 3, except that, in the particle diameter of the soil to be sorted, the third particle diameter is smaller than the second particle diameter. The process of sorting the fine soil of

At this time, the third particle size may be 0.7 to 0.8 mm, and soil having a third particle size or larger may be separated and discharged as washing soil and subjected to a separate treatment process. In addition, the washing water sprayed from the second wet sorting device 5 may also be supplied from the washing water tank 8-1 to be described below.

The second cyclone 6 is provided between the rear end of the second wet sorting device 5 and the front end of the sedimentation tank 7, and is smaller than or equal to a third particle size that is separated and discharged from the second wet sorting device 5 of fine soil is introduced, and fine soil smaller than the 4th particle size, which is relatively smaller than the 3rd particle size, is selected, separated and discharged, and it is introduced into the sedimentation tank (7).

The second cyclone 6 performs a particle size separation process by specific gravity difference in the introduced soil, and the structure and operation mechanism of the second cyclone 5 can be applied to various known technologies, so a detailed description thereof is omitted.

As such, in this embodiment, the first wet sorting device 3, the first cyclone 4, the second wet sorting device 5 and the second cyclone 6 are arranged in conjunction, and purification is performed through their sequential particle size separation. By further refining the target contaminated soil, the removal of heavy metals adsorbed to soil with a relatively small surface area that cannot be removed through the magnetic separator 1 is also possible without additional oxidizing agent input, so it is environmentally friendly and the purification efficiency will be further improved it can be

Meanwhile, the coagulation sedimentation tank 8 according to an embodiment of the present invention has a structure capable of increasing the removal efficiency of scum generated in the sedimentation treatment of the accommodated floating soil.

Specifically, the coagulation sedimentation tank 9 of this embodiment, as shown in FIG. 5, is a treatment in which the suspended soil discharged from the sedimentation tank 7 is introduced and the treated water including the introduced floating soil is maintained up to a preset water level. A tank 10, an inclined skimmer provided inside the treatment tank 10 to collect suspended substances floating on the water surface A, and a scum tank 20 into which suspended substances collected by the inclined skimmer are introduced. is comprised of

Here, the suspended matter includes all of the normal scum and free-phase oil components, etc. generated during the sedimentation process for the suspended soil included in the treated water.

The treatment tank 10 is provided with an inlet 100 on one side and an outlet 110 on the other side, respectively, so that the suspended soil and supernatant discharged from the preceding sedimentation process are introduced, and the treated water that has undergone a coagulation sedimentation process, that is, the supernatant is the It is discharged through the outlet 110 .

Since the water level of the treated water received in advance in the treatment tank 10 may change due to the inflow of the floating soil and supernatant, it is treated in response to the inflow of the floating soil and the supernatant so that the treated water can be maintained up to a preset water level. Allow veterinary replenishment or discharge to be selectively adjusted.

The treated water discharged through the outlet 110 after the flocculation and sedimentation treatment of the flocculation and sedimentation tank 8 is introduced into the washing water tank 8-1 provided at the rear end of the flocculation and sedimentation tank 8 and stored. The treated water is supplied to the first wet sorting device 3 and the second wet sorting device 5 so that it can be used as washing water.

In addition, a sediment outlet 120 is provided at the bottom of the treatment tank 10 to discharge the sediment deposited from the floating soil for a certain period of time. Although not shown in the drawing, the sediment outlet 120 is provided with a transfer line connected to the inlet end of the enrichment tank 9 so that the discharged sediment can be introduced into the enrichment tank 9 .

The inclined skimmer is a transfer blower 20 for transferring suspended substances floating on the water surface A of the treatment tank 10 from one side of the treatment tank 10 to the other side, and the transfer blower 20 It is configured to include an inclined conveyor 40 for transporting and introducing the suspended material to the side to the scum tank 30 .

The transfer blower 20 is installed along the width direction of the water surface A from one side of the treatment tank 10 and is operated by a control signal input from the outside to discharge the air to the entire area of the water surface A. Floating substances floating on (A) are moved to the other side of the treatment tank (10).

In addition, the air discharge of the transfer blower 20 is continuously performed during the removal process of the suspended matter to induce a normal movement direction of the suspended matter and prevent retrograde.

In the case of the transfer blower 20, it is possible to select and apply a suitable one of various known blowers having a blowing function.

The scum tank 30 is provided to have an independent accommodating space 300 in the inner space of the treatment tank 10, is installed on the other side of the treatment tank 10, and is installed on the water surface (A) by the transfer blower 20 ) so that suspended matter moving in the phase is introduced.

The scum tank 30 includes a pair of side walls 31 and 32 spaced apart from each other along the width direction of the water surface A in the interior of the treatment tank 10, and between the pair of side walls 31 and 32 The accommodating space 300 is constituted by one lower wall (not shown) connecting the lower parts, in which case the pair of side walls 31 and 32 are installed relatively higher than the water surface of the treatment tank 10 to accommodate them. While preventing the suspended substances once introduced into the space 300 from being discharged, the treated water accommodated in the treatment tank 10 is prevented from overflowing and flowing.

Although not shown in the drawings, the scum tank 30 is provided with an opening to enable separate discharge of the suspended matter introduced into the accommodation space 300 .

In addition, as shown in FIG. 6 , the scum tank 30 includes a cover plate 310 having one end bent toward the receiving space 300 while extending upward along the longitudinal direction of the other side wall 32 , and the cover A plurality of second through-holes 311 formed in the plate 310 may be included.

That is, some treated water may be introduced into the scum tank 30 together with the transferred suspended matter. When the inflow gradually increases and the suspended matter and treated water reach the upper end of the side wall, the cover plate 310 will Discharge of suspended matter is minimized and only treated water is discharged through the second through hole 311 .

Therefore, the second through hole 311 is preferably configured to have a fine particle diameter through which only water particles can pass.

The inclined conveyor 40 is installed to have an upward inclination from the water surface A of the treatment tank 10 so that suspended matter can be introduced into the scum tank 30 installed at a relatively high position.

The inclined conveyor 40 according to an embodiment of the present invention is installed to have an upward inclination at the other end of the flat portion 400 and the flat portion 400 installed in the water as shown in FIG. It may be configured to include an inclined portion 410 and a conveying belt 420 mounted to orbit between the flat portion 400 and the inclined portion 410 to orbitally move in any one direction.

First, the planar part 400 is installed in water so as to be adjacent to the water surface A of the treatment tank 10 while forming a plane of a certain area.

And the inclined portion 410 is installed so as to have an upward inclination at the other end of the flat portion 400, and the end is installed so as to be located at the upper end of one side wall 31 of the scum tank 30, the flat portion 400 The suspended material transferred from the scum is moved upward along the slope, and the upwardly moved floating material is allowed to fall into the scum tank 30 so that it can be introduced into the accommodation space 300 .

That is, the inclined conveyor 40 is configured to be inclined after a part of its tip forms a flat area in water close to the water surface (A). Stable collection of suspended matter is performed by allowing the non-suspended material located on the upper surface to be placed on the upper surface of the transfer belt 420 in advance and then moved upward.

On the other hand, the flat portion 400 and the inclined portion 410 is composed of at least two driving rollers 401 and 411 that are spaced apart from each other while parallel to the width direction of the water surface A inside the treatment tank 10 . The transfer belt 420 is mounted on the outer periphery of the driving rollers 401 and 411 .

In addition, although not shown in the drawings, each of the driving rollers 401 and 411 may be integrally driven by a power transmission means including a chain or a belt, and the rotational force of the rotating motor is applied to one selected driving roller 401 , 411 . By being transmitted, one-way rotation is possible.

The conveying belt 420 is installed to surround the flat portion 400 and the inclined portion 410 and is formed between the flat portion 400 and the inclined portion 410 by rotation of the driving rollers 401 and 411 in one direction. orbit the

Here, the conveying belt 420 is preferably provided with a plurality of first through holes 421 as shown in FIG. 6 .

The first through hole 421 is also configured to have a fine particle diameter through which only water particles can pass, similarly to the second through hole 311 . It is minimized, and accordingly, the volume increase of the scum tank 30 due to the inflow of water is minimized.

The inclined conveyor 40 may further include a tally drum 430 attached to the transfer belt 420 so that floating substances that cannot fall into the accommodating space 300 of the scum tank 30 can be detached. .

The tally drum 430 is installed adjacent to the end of the inclined portion 410 at the upper end of one side wall 31 of the scum tank 30, and a plurality of brush members 411 are mounted radially along the outer periphery. do.

The brush member 411 has a length sufficient to be in close contact with the conveying belt 420 of the inclined conveyor 40, and the tally drum 430 moves in a direction opposite to the orbital movement direction of the conveying belt 420. By rotating, the brush member 411 shakes off the floating substances attached to the surface of the transport belt 420 in the process of turning the transport belt 420 to be detached, and the detached suspended substances are located at the bottom of the scum Let it fall into the receiving space 300 of the tank 30 .

On the other hand, the electrophilic coagulation tank 8 of the present invention is disposed so that the distance between each other increases from both sides of the flat portion 400 toward one side of the treatment tank 10, and the end is the amount of the treatment tank 10 . It further includes a pair of guide partition walls 50 each attached to the inner wall, and a portion of the upper portion is installed to be exposed above the water surface of the treatment tank (10).

As shown in FIG. 7 , the induction bulkhead 50 prevents the floating substances transferred by the blowing of the transfer blower 20 from being concentrated on the side portion of the treatment tank 10, and the suspended substances are transferred to the inclined conveyor. By inducing it to gather to the tip side of (40), the collection efficiency of suspended matter can be improved.

In addition, in the present invention, as shown in FIG. 7 , suspended substances including oil and scum deposited on the transfer belt 420 are desorbed into the scum tank 30 to control the re-inflow of the suspended substances into the treatment tank 10 . Further examples are presented.

In the case of this embodiment as well, the plurality of first through holes 421 are formed in the transfer belt 420 is the same. However, the conditions under which suspended matter can be deposited on the inclined conveyor 42 by the first through hole 421 become greater. In this embodiment, scum and oil are desorbed and re-introduced into the treatment tank 10 as the deposited suspended matter. is to control it.

In this embodiment, an oil absorption pad 441 is mounted along the outer periphery on the lower portion of the transfer belt 420 as the upper portion of the scum tank 30, and rotates in the opposite direction to the orbital movement direction of the transfer belt 420 Thus, the oil removal drum 440 for adsorbing the oil attached to the transfer belt 420 is configured.

In the case of the oil removal drum 440, it is also rotated in connection with the rotational interlocking of the conveying belt 420, and the oil absorption pad 441 is immersed in the conveying belt 420 while in contact with the conveying belt 420. It is to detach the oil from the transfer belt 420 by adsorption.

The oil absorption pad 441 may be made of a variety of known materials, for example, polyether nonwoven fabric may be applied.

In addition to this, the oil removal drum 440 includes a support 442 mounted on the shaft and a removal plate 443 mounted on the support 442 to desorb the oil adsorbed from the oil absorption pad 440. do it with The oil absorption pad 441 on which the oil is adsorbed by this configuration is such that the oil absorbed by the detaching plate 443 is desorbed and guided to the scum tank 30 during the rotation process.

Preferably, a hydrophilic coating layer is applied to the detaching plate 443 to control the deposition of the oil detached by the detaching plate 443 to the detaching plate 443 .

In addition, in the case of this embodiment, the tally drum 430 is further configured. In this embodiment, as shown in the drawing, the upper portion of the scum tank 30 and the lower portion of the transfer belt 420 are radially multiple along the outer periphery. of the brush member 421 is mounted, and the brush member 421 is inserted into the first through hole 421 while rotating in the opposite direction to the orbital motion direction of the conveying belt 420, so that the floating material attached to the conveying belt ( scum) will be removed.

As shown in the drawing, the floating material (S1) interlocking riding on the transfer belt 420 falls and flows into the scum tank 30, as shown in the drawing, and the oil (O) deposited on the transfer belt 420 is removed from the oil. The scum S2 is introduced into the scum tank 30 by being adsorbed and desorbed by the drum 440 , and the scum S2 deposited on the transfer belt 420 flows into the scum tank 30 by being desorbed by the tally drum 430 . to make it happen

Those skilled in the art from the above description will be able to see that various changes and modifications are possible without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the content described in the detailed description of the specification, but should be defined by the claims.

1: Magnetic separator 2: Storage hopper
3: first wet sorting device 4: first cyclone
5: Second wet sorting device 6: Second cyclone
7: sedimentation tank 8: coagulation sedimentation tank
8-1: Washing water tank 9: Concentrating tank
9-1 : filter press
10: treatment tank 20: transfer blower
30: scum tank 31: one side wall
32: the other side wall 40: inclined conveyor
50: guide bulkhead 300: accommodation space
310: cover plate 311: second through hole
400: flat portion 410: inclined portion
420: transfer belt 421: first through hole
430: tally drum 431: brush member
630: inlet 640: incision hole
650: distribution block 660: fixed plate
670: elastic spring 700: scraper

Claims (15)

a magnetic separator for selecting and removing metallic materials from the contaminated soil to be purified, magnetically introduced into the contaminated soil, and storing and discharging the selected soil from which the metallic material has been removed;
a storage hopper in which the sorted soil discharged from the magnetic separator is introduced and stored;
a first wet sorting device for separating and discharging the sorted soil discharged from the storage hopper by separating and discharging the sorted soil that is smaller than a first particle size from the sorted soil while washing the supplied sorted soil by injecting washing water;
a first cyclone in which the soil having a size of less than a first particle size separated and discharged from the first wet sorting device is introduced, and fine soil having a size smaller than a second particle size relatively smaller than the first particle diameter is separated and discharged;
a sedimentation tank in which the fine soil separated and discharged from the first cyclone is introduced, the fine soil is gravity sedimented to the bottom, and the unsettled floating soil is discharged;
a coagulation sedimentation tank in which the suspended soil discharged from the sedimentation tank is introduced, and a coagulant is input to cause the aggregated sediment from the floating soil to settle to the bottom;
a thickening tank connected to the discharge ends of the sedimentation tank and the coagulation and settling tank, the sediments treated respectively in the sedimentation tank and the coagulation and settling tank are introduced, and the sediments are stored to generate gravity-separated concentrated sludge and discharge the generated concentrated sludge; and
Concentrated sludge discharged from the thickener is introduced, and the concentrated sludge is subjected to dehydration treatment to produce and discharge a dewatering cake; includes;
The coagulation precipitation tank,
a treatment tank in which the floating soil discharged from the sedimentation tank is introduced and the treated water including the introduced floating soil is maintained so as to be maintained at a predetermined water level;
a transfer blower installed to blow air from one side of the treatment tank toward the water surface so that floating substances floating from the treated water are moved in the other direction; and
A scum tank provided to have an independent accommodation space in the inner space of the treatment tank and installed on the other side of the treatment tank, into which floating substances moving on the water surface by the transfer blower are introduced; including,
The scum tank is
An accommodation space is formed by a pair of side walls spaced apart from each other along the width direction of the water surface in the treatment tank and a lower wall connecting a lower portion between the pair of side walls, and the pair of side walls are higher than the water surface of the treatment tank Floating materials transported by an inclined conveyor installed at a position and installed to have an upward inclination from the water surface of the treatment tank fall and flow in, and extend upward along the longitudinal direction of the other side wall located on the other side of the pair of side walls and a cover plate having one end bent toward the accommodating space, and a second through hole formed in the cover plate. Only treated water is discharged,
The inclined conveyor is
A flat part installed in water so as to be adjacent to the water surface of the treatment tank while forming a plane, an inclined part installed to have an upward inclination from the other end of the plane part, and an inclined part installed so that the end is located at the upper end of one side wall of the scum tank, and the plane Floating material floating on the water surface and non-suspending material located in the water adjacent to the water surface, including the conveying belt installed to surround the part and the inclined part and having orbital motion and a plurality of first through holes are formed, are preceded by the upper part of the conveying belt After being placed on the surface, it moves upward,
An oil absorption pad is mounted along the outer periphery of the lower portion of the transfer belt as an upper portion of the scum tank and rotates in a direction opposite to the orbital motion direction of the transfer belt to absorb oil attached to the transfer belt and the scum A plurality of brush members are mounted radially along the outer periphery along the outer periphery of the lower part of the transport belt as the upper part of the tank, and are attached to the transport belt by rotating in the opposite direction to the orbital movement direction of the transport belt so that the brush members are inserted into the first through hole. Further comprising a thali drum to allow the suspended matter to be removed,
The oil removal drum has a support mounted on the shaft, a hydrophilic coating layer is applied on the surface, and a removal plate that is mounted on the support and desorbs the oil adsorbed from the oil absorption pad. Heavy metal-contaminated soil complex treatment system using high magnetic force, characterized in that the adsorbed oil is desorbed and guided to the scum tank.
The method of claim 1,
The magnetic separator,
An inlet through which contaminated soil is put is provided at the upper end, and an incision hole is formed on both sides of the lower end in the longitudinal direction; Heavy metal-contaminated soil complex treatment system using high magnetic force, characterized in that it includes a first hopper that communicates with the incision hole at the lower part of the sorting drum and the input space and stores the sorted soil from which the metallic material has been removed through the incision hole.
3. The method of claim 2,
The input space is
It further includes a distribution block that is installed to protrude toward the top while crossing the center of the inlet to separate and partition the space, and the bottom surfaces of both spaces partitioned by the distribution block have a downward inclination gradient toward each incision hole. Heavy metal-contaminated soil complex treatment system using high magnetic force, characterized in that it is formed.
4. The method of claim 3,
The magnetic separator,
Using high magnetic force, characterized in that it further comprises a fixing plate fixedly installed at a position spaced apart from the bottom of the input space, and one or more elastic springs connected in a vertical direction between the upper surface of the fixing plate and the bottom surface of the input space. Heavy metal-contaminated soil complex treatment system.
4. The method of claim 3,
The magnetic separator,
A second scraper having a downward inclination and installed so that one end is in close contact with the outer periphery of the sorting drum at a position opposite to the rotational direction of each sorting drum, and an opening is formed in the upper part and the other end of the scraper is installed so as to be soft with the opening Heavy metal contaminated soil complex treatment system using high magnetic force, characterized in that it further comprises a hopper.
The method of claim 1,
The storage hopper is
A body having a storage space formed therein and an opening/closing means provided at the lower portion, and a corner guide plate mounted along the longitudinal direction at each corner of the inner periphery of the body in the shape of a curved plate having a flat cross-section inwardly curved inward. A complex treatment system for heavy metal contaminated soil using high magnetic force.
The method of claim 1,
It is provided at the rear end of the first cyclone and is smaller than the second particle size that is separated and discharged from the first cyclone is introduced, and the washing water is sprayed to wash the introduced fine soil and smaller than the second particle size. a second wet sorting device for separating and discharging fine soil smaller than a relatively small third particle size; and
It is provided between the rear end of the second wet sorting device and the front end of the sedimentation tank, and fine soil less than or equal to a third particle size that is separated and discharged from the second wet sorting device is introduced, and a fourth particle size that is relatively smaller than the third particle size Heavy metal contaminated soil complex treatment system using high magnetic force, characterized in that it further comprises; a second cyclone that sorts the fine soil below, separates and discharges it, and causes it to flow into the sedimentation tank.
delete delete delete delete The method of claim 1,
From both sides of the flat part, the distance between each other is increased toward one side of the treatment tank, the ends are attached to both inner walls of the treatment tank, respectively, and a pair of installed so that a part of the upper part is exposed above the water surface of the treatment tank Induction bulkhead; heavy metal-contaminated soil complex treatment system using high magnetic force, characterized in that it further comprises. delete delete delete

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