KR101915030B1 - Drum type heavy metal release reactor for remediation of complex contaminated soils - Google Patents

Abstract

According to an aspect of the present invention, the present invention relates to a drum-type heavy metal elution tank for purifying complexly contaminated soil, which can remove not only oil but also heavy metal from contaminated soil in an efficient manner by maximizing efficiency of rotational friction by the drum-type heavy metal elution tank using force derived from the falling of the contaminated soil. According to an embodiment of the present invention, the drum-type heavy metal elution tank for purifying complexly contaminated soil comprises: an elution tank which has a treatment water inlet and an elution material inlet, formed on one side to elute heavy metal from fine soil by mixing fine soil with an elution material, and a treatment water outlet formed on the other side; a rotation drum which is installed in the elution tank, is floated and rotated, and elutes heavy metal chemically bound to the fine soil based on a falling principle of the fine soil; and a rotation device which floats the rotation drum in the elution tank and rotates the rotation drum.

Description

TECHNICAL FIELD [0001] The present invention relates to a drum type heavy metal reclaimed soil for purification of complex soil,

The present invention relates to a drum-type heavy metal leaching tank for purifying a complex contaminated soil, and more particularly to a drum type heavy metal leaching tank that utilizes the falling force of a contaminated soil to maximize rotational friction efficiency, The present invention relates to a drum-type heavy metal leaching tank for purifying a complex contaminated soil which can be removed.

In general, environmental pollution can be classified into air pollution, water pollution, and soil pollution. Among them, soil pollution poses a serious threat to food production, and also pollutes the groundwater as well as groundwater pollution. Contaminated soil needs to be cleaned up early.

In recent years, soil pollution in Korea is mainly caused by unauthorized landfill or leakage of liquid wastes. In addition, it is caused by the underground diffusion of ground - level objects left in the course of long - term industrial activities. It is caused by various kinds of chemical species rather than single species compounds. Representative complex pollution occurs in most industrial activity areas in the form of oil and heavy metals.

Methods for recovering contaminated soil can be classified into physical methods such as soil washing, incineration, solidification, stabilization and solvent extraction, and biological methods such as soil cultivation, composting, bio-venting, and plant restoration. Among these methods, it is relatively easy to recover soil contaminated easily and is a soil washing method.

The contaminated soil washing method is a technique of using a proper detergent to weaken the surface tension of the harmful organic pollutants bonded to the soil particles or to separate them from the soil particles by changing the heavy metal to liquid, And can be applied regardless of the kind of the pollutant.

The soil washing method is divided into an in-situ method and an off-site treatment method (Ex-situ method). On-site treatment method does not exclude contaminated soil, It is a method to directly clean the contaminated soil by circulating the cleaning agent in the contaminated soil to install the effluent treatment facility, pump and instrumentation facility, volatile matter treatment facility, etc. on the contaminated site. It is difficult to recover the cleaning agent Of course, since there is a disadvantage that there is no mobility, the soil washing method is mainly applied to off-site treatment.

The off-site treatment method is to detect the distribution of pollutants in the soil and the physical / chemical characteristics of the soil, excavate the contaminated soil to be treated, and then wash the contaminated soil excavated with an appropriate cleaning agent And is used as a recently generalized soil washing method.

Conventional soil washing methods are used to select and wash the contaminated soil in multiple steps to remove various contaminants including oil and heavy metals attached to the contaminated soil, thereby restoring the soil. Korean Patent No. 10-0534067 (Restoration of Contaminated Soil And a soil washing method and apparatus for sorting were proposed.

In the prior art, the contaminated soil is sorted through a dry sorting step and a high pressure spraying step, and then washed in a primary washing tank and simultaneously discharged and discharged into a flooded soil containing a large amount of contaminants and immersed soil containing a small amount of contaminants , The separated soil is washed and separated into the micro-soil and the granular soil simultaneously with the washing in the secondary washing tank, and the granular soil is dehydrated and reduced to the soil for restoration. The micro-soil, together with the suspended soil discharged from the primary washing tank, And dehydration process, and the contaminated cleaning agent is neutralized and recycled.

Such conventional prior arts are characterized in that the soil particles having a large particle size are selected from a dry separator and a high pressure spraying separator, and then the cleaning process is performed in the primary and secondary washing tanks, and then the micro- So that the second environmental pollution is caused by waste. In particular, pollutants adsorbed on the particulate soil can not be effectively removed.

In addition, when the metal component is strongly bonded to the soil particles only by the conventional soil washing technique, if the density and surface characteristics of the metal-containing soil and the non-containing soil are not clearly distinguished, If the technique is difficult to apply, if the heavy metals are combined with soil particles of various sizes, or if the silt / clay content exceeds 30-50% or the soil with high humic content, There is a problem that it is difficult to effectively remove contaminants adsorbed on the soil.

Conventional soil cleaning technology is characterized by low purification efficiency when the soil to be applied contains a large amount of fine soil. This is due to the characteristic of fine soil having a large specific surface area and a large amount of adsorbed sites. It is difficult to desorb through purification method because oil and inorganic contaminants are more strongly adsorbed than granulated soil. In addition, in the case of purifying soil contaminated with heavy metals, acid pickling is mainly applied to date, which is disadvantageous in terms of economy, environment friendliness and safety. Also, in the treatment of washing water containing heavy metals, the use of chemical coagulants increases the amount of processing by-products, which results in a high waste treatment cost. Existing electrochemical treatment process applied to general wastewater treatment is based on the fact that the current control method for inorganic flocculation is fixed according to the initial pollution degree, so an excessive current flows, resulting in energy waste, increase in sludge generation amount, Secondary environmental pollution is caused.

Meanwhile, as disclosed in Korean Patent Laid-open Publication No. 10-2014-0137917, the conventional heavy metal leaching method is a method of simply leaching contaminated soil with an elution material such as water and sulfuric acid and eluting it, so that the elution efficiency is poor.

One aspect of the present invention is to provide a drum type heavy metal extraction method for efficiently removing heavy metals as well as oil from contaminated soil through the maximization of rotational friction efficiency by a drum type heavy metal leaching tank based on the falling principle of contaminated soil And the like.

Another aspect of the present invention is to provide a drum heavy metal excavation for the purification of a complex contaminated soil capable of simultaneous treatment of soil contaminated with oil and heavy metals.

Another aspect of the present invention is to provide a drum-type heavy metal excavation capable of reducing the amount of water used in the process of dissolving heavy metals in contaminated soil.

Another aspect of the present invention is to provide a drum type heavy metal excavation for the purification of a complex contaminated soil capable of reducing the volume of the treated soil through physical sorting techniques.

Another aspect of the present invention is to provide a drum type heavy metal purification method for purifying a complex contaminated soil which can be easily applied to a purification process of a complex contaminated soil by modularly and unitarily manufacturing each unit process.

In order to purify heavy soil contaminated with complex soil according to an embodiment of the present invention, a treatment water inlet and an outflow material inlet are formed on one side so that heavy metal is dissolved in the fine soil by mixing fine soil with an elution material, A rotating drum installed in the inside of the casting tank for rotating the float to cause a heavy metal chemically bonded to the micro-soil to be released based on the principle of falling of the micro-soil; And a rotating device for rotating the rotary drum and rotating the rotary drum.

In addition, the micro-soil having been subjected to the heavy metal for drum-type heavy metal is characterized by comprising: a concentrated storage tank into which the fine soil discharged from the drum type heavy metal is introduced and stored; The solid particles of the solid particles are transferred to a chemical reaction and settling tank, and a centrifugal filtrate reservoir for storing the filtrate generated in the centrifugal separation by the centrifugal separator.

In addition, the rotary drum includes a cylindrical inlet drum having a first size through which the fine soil to be eluted flows, and a plurality of water outflow holes formed on an outer circumferential surface of the rotary drum so that the fine soil introduced through the inlet drum is floated, A cylindrical drum housing having a first size and a second size larger than the first size in which a spiral first rotary transfer blade is formed on an inner circumferential surface of the cylindrical drum housing and an inner circumferential surface of the drum housing, And a cylindrical discharge drum of the first size in which a helical second rotary transfer blade is formed.

The rotary drum includes a cylindrical inlet drum having a first size to which the fine soil to be eluted flows, and a plurality of water holes on the outer circumferential surface of the fine drum so that the fine soil inflowed through the inlet drum is floated, And a spiral second rotary feedthrough is formed on the inner circumferential surface of the drum housing so that the fine soil from which the heavy metal leached out is discharged to the outside, And a cylindrical outlet drum of the first size in which a blade is formed.

In addition, a plurality of outflow holes are formed on the outer circumferential surface of the cylindrical inlet drum of the first size into which the fine soil to be eluted is introduced, and on the outer circumferential surface of the fine soil to flow out of the fine soil, A cylindrical rotary drum housing having a first size and a second size larger than the first size and having a helical first rotary feed edge formed therein; and a second spiral rotary feeder for discharging the fine- And an inclined drum disposed in a space between the drum housing and the outlet drum and formed so as to be inclined so as to be smoothly transferred to the outlet drum by the fine soil transferred from the drum housing, .

A first drum housing having a cylindrical inlet drum through which the fine soil to be eluted flows into and a first outlet hole formed on an outer circumferential surface of the fine toe to allow the fine soil flowing through the inlet drum to float and elute heavy metal from the fine soil; And a second drum housing installed on the outer surface of the first drum and having a second outlet hole formed on an outer circumferential surface thereof, the second outlet hole being smaller than the first outlet hole, and a second drum housing disposed in the drum housing, And a cylindrical discharge drum having a spiral second rotary transfer blade formed on its inner circumferential surface.

In addition, a plurality of horizontal bars are formed on the inner circumferential surface of the drum housing along the predetermined intervals so that the fine soil rises to a predetermined height and falls down.

In addition, the leaching tank includes a hopper and a dry type separator for dry-sorting the contaminated soil by the first particle size standard so as to sequentially sort the contaminated soil based on the predetermined particle size, A second wet vibration discriminator for wet-sorting the contaminated soil introduced from the first wet vibration discriminator on the basis of a third particle size, and a second wet vibration discriminator for wet- A plurality of sorting devices including a hydrocyclone for discharging smaller particles to the discharge port and returning larger particles than the fourth particle size reference to a second wet vibration discriminator, And the heavy metal is eluted from the fine soil of particles smaller than the standard.

The drum type heavy metal for the purification of the contaminated soil according to the embodiment of the present invention is characterized in that the fine soil in the range of 0.04 mm to 0.3 mm is mixed with the leaching material to treat the one side so that the heavy metal chemically bonded to the fine soil is eluted And a treatment water discharge port formed on the other side of the discharge port, wherein the discharge port is provided inside the discharge port, and the discharge port is chemically bonded to the micro-soil using a falling force of the micro- A rotary gear which is constituted by an inlet drum and an outlet drum outer circumferential surface constituting both sides of the rotary drum for floating and rotating the rotary drum inside the rotary drum, A drive gear disposed on an outer circumferential surface of the rotary drum; And a rotating device including a rotating roller for supporting a lower portion of each rotary gear formed in the drum and the outlet drum, and a driving motor connected to the driving gear of the outlet drum by a driving chain for rotational driving.

Therefore, the drum type heavy metal for the purification of the contaminated soil according to the embodiment of the present invention maximizes the rotary friction efficiency by the drum type heavy metal leaching tank which utilizes the falling force of the contaminated soil, so that not only the oil but also the heavy metals can be efficiently So that it can be removed.

In addition, the drum type heavy metal for the purification of the contaminated soil according to the embodiment of the present invention has the effect of reducing the amount of water used in the leaching of heavy metals in the contaminated soil.

In addition, the drum type heavy metal for the purification of the contaminated soil according to the embodiment of the present invention can control the temperature of the treated water used in the leaching process of the heavy metals in the contaminated soil, It is effective.

In addition, the drum type heavy metal for the purification of the contaminated soil according to the embodiment of the present invention can be manufactured by modularization of each unit process of the complex contaminated soil so that it can be easily applied to the purification process of the contaminated soil There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram schematically showing a complex contaminated soil purification system including a drum type heavy metal exploration according to an embodiment of the present invention; FIG.
FIG. 2 is a view showing a complex contaminated soil purification system including a drum-type heavy metal exploration according to an embodiment of the present invention.
FIG. 3 is an enlarged view of a plurality of sorting devices shown in FIG. 2. FIG.
FIG. 4 is an enlarged view of the chemical reaction and the settling tank shown in FIG. 2. FIG.
FIG. 5 is an enlarged view of the drum type heavy metal eluting system shown in FIG. 2. FIG.
6 is a schematic front view of a drum-type heavy metal elutriation apparatus according to an embodiment of the present invention.
7 is a schematic view of a side view of a drum-type heavy metal elutriation apparatus according to an embodiment of the present invention.
FIG. 8 is an enlarged view of the inside of a drum-type heavy metal elutriation vessel according to an embodiment of the present invention.
FIG. 9 is a view showing the drum type heavy metals according to another embodiment of the present invention.
FIG. 10 is a view showing a drum type heavy metal according to another embodiment of the present invention. FIG.
11 is a view showing a drum type heavy metal forging according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a complex contaminated soil purification system including a drum type heavy metal forging according to an embodiment of the present invention. FIG. 2 is a schematic view of a complex contaminated soil Fig.

As shown in FIGS. 1 and 2, in a complex contaminated soil purification system 10 including a drum type heavy metal foraging according to an embodiment of the present invention, in order to sequentially sort contaminated soil on a predetermined particle size basis, A first wet vibration discriminator 200 for wet-sorting the contaminated soil introduced from the hopper and the dry separator 100 based on a second particle size, A second wet vibration discriminator (300) for wet-sorting the contaminated soil introduced from the first wet vibration discriminator (200) by a third particle size standard, and a second wet vibration discriminator A plurality of sorting devices 100 to 400 including a hydrocyclone 400 for discharging particles larger than the fourth particle size reference to the second wet vibration discriminator 300 and a hydrocyclone 400) An inflow pipe 510 through which the contaminated soil discharged from the contaminated soil 400A flows, a chemical input unit 520 for inputting the coagulant and the neutralizer in a predetermined ratio, an agitator for mixing the flocculant introduced into the inflowed soil, A sedimentation tank 540 in which the washing water flows in the chemical reaction tank 530 and flows into the sedimentation tank 540 so that the precipitated sludge is collected (500) for discharging a heavy metal from a contaminated soil of a particle smaller than a third particle size standard discharged from the second wet vibration discriminator (300) A rotating drum 40 installed in the interior of the drying tank 30 to discharge a heavy metal which is floating and rotating in the fine soil; A rotating field And a drum type heavy metal ejection system (600) having a tooth (50).

That is, the contaminated soil supplied to the complex contaminated soil purification system according to the embodiment of the present invention includes the hopper and the dry type separator 100, the first wet vibration discriminator 200, the second wet vibration discriminator 300 and the hydrocyclone The contaminated soil that has passed through the plurality of sorting devices 100 to 400 including the chemical reaction and sedimentation tank 500, the concentration tank 700, So that the contaminated soil can be efficiently purified through the press 800.

First, a plurality of sorting devices according to an embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged view of a plurality of sorting devices shown in FIG. 2. FIG.

As shown in FIG. 3, a plurality of sorting apparatuses 100 to 400 according to an embodiment of the present invention sequentially sort the contaminated soil based on the first grain size, A first wet vibration discriminator 200 for wet-sorting the contaminated soil introduced from the hopper and the dry separator 100 based on the second particle size, a first wet vibration discriminator 200 for wet- A second wet vibration discriminator 300 for wet-sorting the contaminated soil introduced from the third particle size based on the third particle size, and particles smaller than the fourth particle size standard are discharged to the discharge port 400A by performing wet- And particles larger than the reference are returned to the second wet vibration discriminator (300).

In the multiple sorting apparatuses 100 to 400 according to the embodiment of the present invention, the contaminated soil collected at the processing site is introduced into the hopper and the dry separator 100, and the hopper and the dry separator 100 are fed to the first particle size reference And the contaminated soil below the first grain size standard is transferred to the first wet vibration discriminator 200.

Specifically, contaminated soil is divided into clean gravel 110 having a size of 15 mm or more and soil gravel having a size of 15 mm or less while passing through the hopper and the dry separator 100. That is, the hopper and the dry separator 100 move along the separator 100 In the process, the gravel having a particle size of 15 mm or less falls down to the bottom through the sorter 100, and the clean gravel having a size of 15 mm or more is filtered by the sorter 100 and collected at a predetermined place.

The soil of 15 mm or less separated by the hopper and the dry type sorter 100 is conveyed to the first wet vibration discriminator 200. Here, pollutants such as oil and heavy metals are mixed together in the soil of 15 mm or less, and the first wet vibration discriminator 200 is used to sort the pollutants again.

The first wet vibration discriminator (200) performs wet sorting of the contaminated soil by the second particle size reference and transfers the contaminated soil below the second particle size standard to the second wet vibration discriminator (300).

Specifically, contaminated soil is divided into washing gravel 220 of 2 mm to 10 mm and soil of 2 mm or less while passing through a first wet vibration discriminating device. That is, the first wet vibration discriminating device 200 The gravels 220 having a particle size of 2 mm to 10 mm fall on the sorting device 200 and are separated by the first sorting conveyor 200. [ (210) and collected at a predetermined place.

The soil of 2 mm or less separated by the first wet vibration discriminator 200 is conveyed to the second wet vibration discriminator 300. Here, pollutants such as oil and heavy metals are mixed together in the soil of 2 mm or less, and the second wet vibration discriminator 300 is further subjected to a selection process. Meanwhile, water spray is provided in the first wet vibration discriminator 200 by spraying water, which is not shown, to smooth the classification of the contaminated soil and to suppress the generation of dust.

The second wet vibration discriminator (300) performs wet sorting of the contaminated soil by the third particle size criterion and transfers contaminated soil below the third particle size criterion to the hydrocyclone (400).

Specifically, the contaminated soil is divided into the washing sand 320 in the range of 0.3 mm to 2 mm and the soil sand in the range of 0.3 mm or less while passing through the second wet vibration discriminating device 300. That is, the second wet vibration discriminating device 300, The gravels having a particle size of 0.3 mm or less in the process of moving along the dust collector 300 are passed through the sorter 300 to the bottom and then transported to the hydrocyclone 400. The dust particles having a size of 0.3 mm to 2 mm The washed sand 320 having a predetermined size is filtered by the sorting machine 300 and is transported by the second sorting conveyor 310 and then passed through a drum type heavy metal leaching system 600 described later.

The soil of 0.3 mm or less separated by the second wet vibration discriminator 300 is transferred to the hydrocyclone 400. Here, the pollutants such as oil and heavy metals are mixed together in the soil of 0.3 mm or less, so that the hydrocyclone 400 is again subjected to the selection process. On the other hand, the second wet vibration discriminator is provided with a water spray portion not shown in the figure, and water is sprayed to smooth the classification of the contaminated soil and suppress the generation of dust.

The hydrocyclone (400) performs wet separation of the granular soil based on the fourth particle size. Specifically, the contaminated soil is divided into fine soil of 0.04 mm or more and fine soil of 0.04 mm or less while passing through the hydrocyclone The fine soil of 0.04 mm or less is transferred to the chemical reaction and settling tank 500, and the fine soil of 0.04 mm or more is sent back to the second wet vibration discriminator 300.

 The hydrocyclone 400 includes a hollow conical tapered portion 410 and a nozzle portion 420 and has a charging port 410 entering in the tangential direction of the cylindrical shape and a charging port 410 extending in a tangential direction of the tapered portion 410 And a first B discharge port 430 connected to the nozzle unit 420. The first A discharge port 420 is connected to the first B discharge port 430,

In other words, water and contaminated soil introduced into the inlet 410 from the second wet vibration discriminator 300 are introduced into the tapered portion 410, and large swirls and small swirls are formed in the tapered portion 410 by swirling phenomenon and centrifugal force, Vertical flow occurs. At this time, the difference in centrifugal force occurs due to the difference in weight of the particles, thereby separating particles having a particle size larger than the fourth particle size and particles having a particle size smaller than the fourth particle size, which are defined on the basis of 0.04 mm, and water.

In other words, the fine particles of 0.04 mm or less and water are discharged through the first IA outlet 420, and the fine particles of 0.04 mm or more are discharged through the first B outlet 430. At this time, It is possible to separate the gravels based on the desired particle size.

Particulates smaller than 0.04 mm separated by solid-liquid separation and fine soil such as water are transferred to the integrated drug reaction and sedimentation tank 500 through the first IA outlet 420 to remove contaminants adsorbed on the fine soil smoothly .

Further, particles larger than 0.04 mm are returned to the second wet vibration discriminator 300, and then a part is further routed through the drum-type heavy metal elution system 600 and then transferred to the integrated drug reaction and sedimentation tank 500, So that it can be easily removed.

Therefore, the plurality of sorting apparatuses 100 to 400 according to the embodiment of the present invention can sort the contaminated soil so that the treated soil is sorted by a particle size standard such as 15 mm or more of soil, 2 to 10 mm of soil, And micro-soil of 0.04 mm or less is transported to the monolithic chemical reaction and sedimentation tank 500. In the micro soil of 0.04 mm to 0.3 mm, the heavy metal is eluted through addition of the drum-type heavy metal release system 600 So that the fine soil, from which heavy metal is eluted, can be transferred to the integrated drug reaction and sedimentation tank 500.

Next, an integrated drug reaction and settling tank according to an embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged view of the chemical reaction and the settling tank shown in FIG. 2. FIG.

4, the monolithic drug reaction and sedimentation tank 500 according to the embodiment of the present invention includes an inlet pipe 510 through which the contaminated soil discharged from the first 1A outlet 420 of the hydrocyclone 400 flows, A chemical reaction tank 530 having a chemical feed unit 520 for feeding a coagulant and a neutralizer at a predetermined ratio and an agitator 531 for mixing the flocculant introduced into the contaminated soil and the neutralizer, The sludge collecting unit 540 includes a sludge collecting unit 540 and a sludge collecting unit 550. The sludge collecting unit 550 collects and discharges the sludge precipitated in the bottom part of the sedimentation tank 540.

In the chemical reaction and sedimentation tank 500, an inlet pipe 510 for continuously supplying wash water containing fine soil to be cleaned is formed, and at the other end of the chemical reaction and sedimentation tank 500, a set amount of a flocculant or a neutralizing agent A medicine introducing portion 520 is formed.

The chemical reaction tank 530 is filled with a neutralizing agent for neutralizing the washing water containing the flocculating agent or the acidified or alkalineized fine soil so as to smoothly remove contaminants including oil and heavy metals contained in the soil to be cleaned, ≪ / RTI >

The chemical reaction tank 530 is provided with an agitator 531 for mixing the flocculant or the neutralizer introduced into the washing water containing the inflowed fine soil to uniformly disperse the flocculant or the neutralizer in the washing water containing the inflowed micro- It promotes aggregation or neutralization.

Depending on the environment of the soil to be cleaned and the type of contaminants to be flocculated, various kinds of flocculants may be used in the flocculant added to the chemical reaction tank 530, and various kinds of neutralizers may be used depending on the acidic or alkaline characteristics of the neutralizing or washing water. Of course it is possible.

The sedimentation tank 540 is supplied with a washing solution in which a coagulant or a neutralizing agent is well mixed in the chemical reaction tank 530, and sediment and sludge are precipitated through gravity.

The settling tank 540 is configured such that the washing water flows from the chemical reaction tank 530 and flows into the chemical reaction tank 530 toward the upper side so that the flow of the washing water swirled from the chemical reaction tank 530 Controlled so as to maintain the settled state of sediment and sludge as much as possible.

At this time, a plurality of sedimentation tanks 540 are provided to control the coagulated contaminants together with the soil and sludge precipitated stepwise. That is, the washing water flowing over from the chemical reaction tank 530 flows over the first sedimentation tank 540B after the soil and sludge have been sedimented through the first sedimentation tank 540A, and flows into the second sedimentation tank 540B So that the washing water from which the soil, sludge and contaminants are removed can be discharged to the process water storage tank 330 through the outlet pipe 542.

The sludge recovery unit 550 is formed below the sedimentation tank 540 so that the sediment and sludge can be collected and discharged to the concentration tank 700. At this time, a sludge discharge pipe 551 for discharging the sediments and sludge is formed in the sludge collection unit 550. An intermittent valve 552 for interrupting the discharge of a large amount of washing water together with the soil and sludge through the sludge discharge pipe 551 and an electric motor 553 for smoothly transferring and discharging the soil and sludge composed of a large amount of solid matter A rotating transporting screw 554 is provided.

The sludge rejection 550 has a shape that narrows downward as the soil and sludge precipitate downward. In particular, the feed screw 554 is formed to have a sufficient length along an inclined surface that narrows downward, It is possible to smoothly carry out the transfer and discharge.

The first settling tank 540 is provided with a pH measuring unit 543 for measuring the pH of the washing water. That is, in the case of the washing water having an acidity or alkalinity due to the contaminant of the soil, the neutralizing agent is injected through the chemical injecting unit 520 and neutralized, so that the pH measuring unit 543 accurately grasps the neutralization. The amount of the neutralizing agent can be controlled by opening / closing the valve provided in the chemical injecting unit 520. [

The control unit (not shown) receives the power supply and controls the chemical injection unit 520, the agitation apparatus 531, the electric motor 553 and the intermittent valve 552. The measurement result of the pH measurement unit 543 By controlling the opening and closing of the valve of the chemical injector 520 in which the neutralizing agent is stored, the mixing ratio of the neutralizing agent and the speed of the agitating device 531 can be controlled to smoothly mix the neutralizing agent.

Therefore, in the chemical reaction and sedimentation tank 500 according to the embodiment of the present invention, in the treatment of the washing water of the micro-contaminated soil passing through the plurality of sorting devices 100 to 400, in addition to the mixing and stirring of the flocculant or the neutralizing agent, So that the efficiency of the siltation can be improved.

A drum type heavy metal eluting system according to an embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged view of the drum type heavy metal eluting system shown in FIG. 2. FIG.

5, the drum type heavy metal release system 600 according to the embodiment of the present invention includes a structure for discharging heavy metal from the fine soil introduced from the second wet vibration detector 300, 20), the heavy metals bound to the fine soil and the like, as well as the solid heavy metals separated from the fine soil, are eluted by using the acid.

The drum type heavy metal eluting system 600 according to the embodiment of the present invention includes a first eluting conveyor 610 connected to an input hopper for receiving fine soil in a second wet vibration discriminator 300, 610) is mixed with the leaching material provided in the leaching material tank (620) to cause the chemically bound heavy metal to be eluted, and a drum-type heavy metal ejection tank (20) A concentrating tank 630 through which soil is introduced and stored for concentration and storage; and a centrifugal separator (not shown) for transferring the solids particles of 0.04 m or less separated by solid-liquid separation of the concentrated fine soil in the concentrated storage tank 630 to the chemical reaction and settling tank 500 640), a centrifugal filtrate reservoir 650 for storing the filtrate generated in the centrifugal separation process, and a second elution conveyor 660 for separating the centrifuged solid particles in the range of 0.04 m to 0.3 m.

The loading hopper is provided with fine gravel in the range of 0.04 mm to 0.3 mm by the second wet vibration separator 300. The fine gravel in the range of 0.04 mm to 0.3 mm transferred to the hopper is transferred to the drum-type heavy metal forage 20 through the first eluting conveyor 610.

The drum type heavy metal forging vessel 20 mixes the fine soil with the dissolving material 621 to allow the heavy metal chemically bound to the fine soil to be eluted. This drum type heavy metal forging vessel 20 uses the falling force of the fine soil So that the heavy metal chemically bonded to the micro-soil can be eluted.

The alkaline agent is supplied together with citric acid which is the elution material 621 in the drum 20 for the heavy metal for the drum type so that the pH in the potting tank 20 can be maintained at about 4.0 to 5.0.

In the embodiment of the present invention, organic acid is used as the eluting material 621 for eluting heavy metals, specifically, citric acid can be used. As the alkaline agent for maintaining the pH of the eluting material 621 properly, sodium citrate .

In general, citric acid, which is an organic acid instead of inorganic acid such as sulfuric acid or hydrochloric acid, is used for dissolving heavy metals because organic acid is not a chemical harmful substance unlike an inorganic acid and is harmless to the human body, , And the organic acid has an excellent dissolution efficiency for heavy metals. In addition, an organic series of sodium citrate similar to citric acid may be used instead of an inorganic-based substance such as an alkali system sodium hydroxide or potassium hydroxide.

The concentrated sludge storage tank 630 stores the concentrated fine sludge discharged from the drum 20 for the heavy metal.

The centrifugal separator 640 separates the concentrated fine particles in the concentrated storage tank 630 and transfers them to the chemical reaction and settling tank 500.

The centrifugal filtrate reservoir 650 stores the filtrate generated during the centrifugation process.

The second elution conveyor 660 allows the centrifuged solid particles in the range of 0.04 m to 0.3 m to be sorted.

Accordingly, the drum type heavy metal foreshorty 20 according to the embodiment of the present invention includes a metal having magnetism through the hopper and the dry separator 100, the first and second wet vibration discriminators 300 and the hydrocyclone 400, The heavy metals are removed again from the micro-soil using the rotational friction of the drum-type heavy metal forging 20 in a state where all the particles are not removed, and then supplied to the chemical reaction and settling tank 500, So that it can be purified more efficiently.

Meanwhile, the concentration tank 700 is installed adjacent to the chemical reaction and sedimentation tank 500 to store and concentrate the micro-sludge settled on the bottom of the chemical reaction and sedimentation tank 500.

A pump (not shown) may be installed between the concentration tank 700 and the chemical reaction and sedimentation tank 500 to transfer the fine sludge.

The filter press 800 is installed adjacent to the concentration tank 700 by pressurizing and dehydrating the fine sludge stored in the concentration tank 700.

The filter presses 800 may be installed in pairs in case of failure.

The fine soil concentrated in the concentration tank 700 is dehydrated in the filter press 800 using the pump 710, and the cake is waste treated, and the filtrate is transferred to the filter filtrate storage tank 820.

That is, the filter press 800 is for final dewatering of the mixed and stirred sludge in the concentration tank 700, and the sludge of the concentration tank 700 is conveyed to the filter press 800 by the pump P.

The filter press 800 may include a pneumatic filter press, an air tank (not shown) for compressing the sludge filled in the filter press 800 by air pressure, and an air tank And an air compressor (not shown).

Next, a drum-type heavy metal leaching tank according to an embodiment of the present invention will be described with reference to FIGS. 6 to 8. FIG. FIG. 6 is a schematic front view of a drum-type heavy metal elutriation apparatus according to an embodiment of the present invention. FIG. 7 is a schematic side view of a drum-type heavy metal elutriation apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view of the interior of a drum-type heavy metal elutriation vessel according to an embodiment of the present invention. FIG.

6 to 8, a drum type heavy metal forging vessel 20 according to an embodiment of the present invention includes a treatment water inlet port 410 and an outflow material inlet port 410 on one side, A rotary drum 40 installed in the interior of the drying tank 30 for floating the heavy metal which is floated and connected to the fine soil and a rotating drum 40 for rotating the rotary drum 40 inside the drying tank And a rotating device (50) for rotating, lifting and rotating.

The application tank 30 has a treated water inlet port 410 on one side and an elution material inlet port 410 on the other side.

Specifically, the application tank 30 has a cylindrical shape and a process water inlet port 410 connected to the process water reservoir 330 to provide treated water to the upper side of the process tank 30, So that it can be easily carried out.

At this time, it is possible to control the temperature of the treated water introduced into the treatment water inlet 410 used in the heavy metal elution process, so that the heavy metal can be eluted more efficiently from the contaminated soil.

The leaching material inlet port 410 connected to the leaching material tank 620 for providing the leaching material 621 to the upper side of the leaching tank 30 constitutes the leaching material 621 ) So that it can be easily inserted.

Needless to say, the application tank 30 may have a treated water outlet 33 for allowing the treated water flowing into the application tank 30 to be discharged to the outside from the lower side.

The rotary drum 40 is installed on both sides of the rotary drum 50 while being inserted into both sides of the rotary drum 50. The rotary drum 40 is connected to the rotary drum 50, 43).

The rotating drum 40 is installed inside the drying tank 30 and floats and rotates so that the heavy metal chemically bonded to the fine soil is discharged using the falling force of the fine soil. A cylindrical drum housing 42 through which the contaminated soil introduced through the inlet drum 41 is floated and rotated so that the heavy metal is eluted, and a contaminated soil from which the heavy metal leached out, And an outlet drum 43 to be discharged.

That is, the rotary drum 40 has the inlet and outlet drums 41 and 43 formed on both sides of the cylindrical drum housing 42 with a predetermined length so as to penetrate and extend to both sides of the application tank 30, 41 and the outlet drum 43 are configured to be connected to the rotating device 50.

Here, the inlet drum 41 and the outlet drum 43 are formed into a cylindrical shape having the same first size, and the drum housing 42 has a second size larger than the first size so that the heavy metal of the contaminated soil can be more efficiently discharged. As shown in Fig.

Although the inlet drum 41 and the drum housing 42 are separated from the outlet drum 43 in the figure, the inlet drum 41, the drum housing 42, and the outlet drum 43 are integrally formed with each other. Of course.

In addition, the fine soil transferred from the inlet drum 41 of the rotary drum 40 is introduced into the cylindrical drum housing 42, and the drum housing 42 has a spiral rotating feed blade 44 A plurality of outflow holes 42A are formed on the outer circumferential surface of the drum housing 42 so that the fine soil is discharged to the outflow material 621 by the water outlet hole 42A Respectively.

In the cylindrical drum housing 42 of the rotary drum 40, a plurality of horizontal bars 42B are formed on the inner peripheral surface of the cylindrical drum housing 42 at regular intervals. This is because when the rotary drum 40 is rotated, (42B) so as to be elevated to a higher height and fall down to the lower portion, thereby allowing the process of eluting the fine soil to be performed more efficiently.

In addition, a helical rotary transfer blade 47 is formed on the inner peripheral surface of the outlet drum 43 of the rotary drum 40 so that the inflowing fine soil can be transferred in one direction.

The rotary device 50 supports the lower portion of the inlet drum 41 and the outlet drum 43 of the rotary drum 40 at a predetermined height so that the rotary drum 40 is lifted, .

More specifically, the rotary device 50 includes a rotary gear 51 constituting an outer peripheral surface of an inlet drum 41 and an outlet drum 43 constituting both sides of the rotary drum 40, And a lower portion of each rotary gear 51 formed on the inlet drum 41 and the outlet drum 43 on both sides of the rotary drum 40 at a predetermined height on both sides of the rotary drum 40, And a driving motor 55 connected to the driving gear 52 of the outlet drum 43 and driven by the driving chain 54 to rotate.

Here, the plurality of rotating rollers 53 are preferably positioned at a predetermined height by the lower base mount 56 and rotated by a bearing.

The drum type heavy metal forging 20 according to an embodiment of the present invention maximizes the rotational friction efficiency of the rotary drum 40 so that the heavy metal can be removed again from the fine soil.

 Next, with reference to FIG. 9, a drum type heavy metal leaching tank according to another embodiment of the present invention will be described. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. FIG. 9 is a view showing the drum type heavy metals according to another embodiment of the present invention.

9, the rotary drum 40A of the drum type heavy metal forging 20A according to another embodiment of the present invention includes a cylindrical inlet drum 41 of a first size into which fine soil to be eluted flows, A plurality of outflow holes 42A are formed on the outer circumferential surface of the fine soil so that the fine soil introduced through the inlet drums 41 is floated and eluted from the fine soil. A spiral first rotary feed edge 44 is formed on the inner circumferential surface. And a spiral second rotary feed edge 43 is formed on the inner peripheral surface of the drum housing 42 so that the fine soil from which the heavy metal leached out of the drum housing 42 is discharged to the outside And a cylindrical outlet drum 43 of the first size.

That is, the rotary drum 40A of the drum-type heavy metal leaching tank according to another embodiment of the present invention includes the inlet drum 41, the drum housing 42, and the outlet drum 43 having the same size, The rotary transfer nibs 44 and 45 are included in the inner circumferential surface of the rotary drum, so that the rotary drum can be easily manufactured.

Next, with reference to FIG. 10, a drum type heavy metal leaching tank according to another embodiment of the present invention will be described. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. FIG. 10 is a view showing a drum type heavy metal according to another embodiment of the present invention. FIG.

10, the rotating drum 40B of the drum type heavy metal forging 20B according to another embodiment of the present invention includes a cylindrical inlet drum 41 of a first size into which fine soil to be eluted flows, A plurality of outflow holes 42A are formed on the outer circumferential surface of the fine soil so that the fine soil inflowed through the inlet drums 41 is floated and eluted from the fine soil, and a spiral first rotary feed edge 44 is formed on the inner circumferential surface thereof. A second size of cylindrical drum housing (42) having a second size larger than the first size, and a second rotary transfer blade (42) on the inner circumferential surface of the drum housing (42) 43 are formed on the outer circumferential surface of the drum housing 42 and the minute size of the cylindrical discharge drum 43 disposed in the space between the drum housing 42 and the outlet drum 43, And is inclined to be smoothly conveyed to the drum 43 And an inclined drum 46 having a spiral third rotary feed edge 47 formed on the inner peripheral surface thereof.

That is, the rotary drum 40B of the drum type heavy metal forging 20B according to another embodiment of the present invention further includes a tilted structure disposed between the drum housing 42 and the outlet drum 43, So that the fine soil can be efficiently transferred by the first to third rotary transfer blades 44, 45, 47 to be discharged to the outside.

Next, with reference to FIG. 11, a drum-type heavy metal eluting tank according to another embodiment of the present invention will be described. The same reference numerals are assigned to the same components as those of the above-described embodiment, and a description thereof will be omitted. 11 is a view showing a drum type heavy metal forging according to another embodiment of the present invention.

11, the rotary drum 40C of the drum 20C for heavy metal according to another embodiment of the present invention includes a cylindrical inlet drum 41 into which the fine soil to be eluted flows, A first drum housing 42 having a first water outlet hole formed on the outer circumferential surface of the micro-soil so that the micro-soil introduced through the drum 41 is floated and discharged from the micro-soil, And a second drum housing (42) formed on the outer circumference of the drum housing (42) and having a second outflow hole (42) smaller than the first outflow hole. The drum housing (42) And a cylindrical outlet drum 43 having a spiral second rotary feed edge 43 formed on its inner circumferential surface so as to be discharged therefrom.

Therefore, the rotating drum 40C of the drum type heavy metal forging 20C according to another embodiment of the present invention is provided with the first and second water discharging holes 42 (42, 42 ") of the first and second drum housings 42 ' The inside of the first and second drum housings 42 'and 42' 'is efficiently controlled by allowing the release of the heavy metal in a state where the fine soot is separated by particle size according to the size of the first and second drum housings 42' and 42 ' So that heavy metals can be eluted more efficiently from the fine-grained soils.

As described above, according to the embodiment of the present invention, the drum type heavy metal for the purification of the contaminated soil maximizes the rotational friction efficiency by the drum type heavy metal leaching tank using the falling force of the contaminated soil, It is possible to efficiently elute the heavy metals as well as the oil, thereby removing the eluted heavy metals. Therefore, many modifications may be made by those skilled in the art without departing from the scope and spirit of the present invention.

10 ... Complex contaminated soil purification system 20 ... Drum type heavy metal excavation
30 ... Solenoid 40 ... rotary drum
50 ... rotator 100 ... hopper and dry sorter
200 ... first wet vibration discriminator 300 ... second wet vibration discriminator
400 ... hydrocyclone 500 ... chemical reaction and settling tank
600 ... Drum heavy metal release system 700 ... Enrichment tank
800 ... filter press

Claims (9)

A processing tank in which a treatment water inlet and an outflow material inlet are formed at one side and a treatment water outlet is formed at the other side so as to mix the fine soil with the dissolution material,
A rotary drum installed in the interior of the casting and rotating in a floating state to cause a heavy metal chemically bound to the micro-soil to be released based on the principle of falling of the micro-
And a rotating device for floating and rotating the rotary drum within the application tank,
The rotary drum includes:
A cylindrical inlet drum of a first size into which the fine soil to be eluted flows,
Wherein a plurality of outflow holes are formed on an outer circumferential surface of the fine soil so that the fine soil introduced through the inlet drums is floated and eluted from the fine soil and a spiral first rotary transfer blade is formed on the inner circumferential surface thereof, 2 cylindrical drum housing,
A cylindrical discharge drum of a first size having a spiral second rotary transfer blade formed on an inner circumferential surface of the drum housing to discharge fine particles from which heavy metal is discharged,
And an inclined drum which is disposed in a space between the drum housing and the outlet drum and formed so as to be inclined so that the fine soil transferred from the drum housing is smoothly transferred to the outlet drum. .
A processing tank in which a treatment water inlet and an outflow material inlet are formed at one side and a treatment water outlet is formed at the other side so as to mix the fine soil with the dissolution material,
A rotary drum installed in the interior of the casting and rotating in a floating state to cause a heavy metal chemically bound to the micro-soil to be released based on the principle of falling of the micro-
And a rotating device for floating and rotating the rotary drum within the application tank,
The rotary drum includes:
A cylindrical inlet drum into which the fine soil to be eluted flows,
A first drum housing having a first water outlet hole formed on an outer circumferential surface thereof for discharging a heavy metal from the fine soil by floating the fine soil introduced through the inlet drum and a second water outlet hole provided on the outer circumference of the first drum, A drum housing including a second drum housing having a second water outlet smaller than an outflow hole,
And a cylindrical outlet drum having a spiral second rotary transfer blade formed on an inner circumferential surface of the drum housing so that the fine soil eluted with heavy metal is discharged to the outside.
3. The method according to claim 1 or 2,
The fine soot having undergone the drum type heavy metal forging treatment,
A centrifugal separator for concentrating and storing fine grains discharged from the drum type heavy metal feeder and for concentrating and storing the fine grains discharged from the drum type heavy metal; Wherein the heavier metal is removed through a centrifugal filtrate reservoir for storing the filtrate generated in the centrifugal separation process by the centrifugal separator.
delete delete delete 3. The method according to claim 1 or 2,
Wherein a plurality of horizontal bars are formed on the inner circumferential surface of the drum housing along a predetermined interval so that the fine soil is raised to a predetermined height and then dropped.
3. The method according to claim 1 or 2,
The above-
A hopper and a dry type separator for dryly selecting contaminated soil on the basis of a first particle size standard in order to sequentially sort polluted soil based on a predetermined particle size and a hopper and a dry type separator for wet sorting the contaminated soil introduced from the hopper and dry separator, 1 wet vibration discriminator, a second wet vibration discriminator for wet-sorting the contaminated soil introduced from the first wet vibration discriminator on the basis of the third particle size, and a second wet vibration discriminator for wet- The second wet vibration discriminator comprising a plurality of sorting devices including a hydrocyclone for discharging particles larger than the fourth particle size reference and returning particles larger than the fourth particle size reference to a second wet vibration discriminator, Characterized in that the heavy metal is eluted from the soil.
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