KR101957650B1 - Grit flotation apparatus, multistage grit chamber and remediation system of contaminated soils comprising thereof - Google Patents

Abstract

The present invention relates to a grit flotation device which can efficiently purify contaminated soil, a multi-stage grit tank, and a contaminated soil purification system including the same. The contaminated soil purification system of the present invention comprises: a feeding device including an input hopper and an input conveyor; a washing selection device including a wet mixer, a first wet vibration selector, a first hydrocyclone, a second wet vibration selector, and a second hydrocyclone; a distribution tank receiving and storing a soil slurry passing through the washing selection device; and a multi-stage grit tank integrally fixed and installed with a grit flotation device.

Description

TECHNICAL FIELD The present invention relates to a sediment flotation device, a multi-stage sedimentation tank, and a contaminated soil purification system including the same.

The present invention relates to a sludge floatation apparatus, a multistage needle settling tank, and a contaminated soil purification system including the same. More particularly, the present invention relates to a multistage needle settling apparatus, The present invention relates to a sludge flotation apparatus, a multistage needle settling tank, and a contaminated soil purification system including the same.

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 ex-situ method. In-situ method is a method to remove contaminated soil without washing solution injecting solution, washing solution discharging solution, washing effluent treating solution, (Soil Flushing), which is a soil flushing method in which volatile substance treatment facilities are installed on contaminated sites and the contaminated soil is directly circulated by circulating the cleaning agent in the contaminated soil to be treated. As a result, the treatment time is long, Because there are no disadvantages, the soil washing method is mainly applied to the Ex-situ method.

The Ex-situ method is used to determine the distribution of pollutants in the soil and the physical / chemical characteristics of the soil, excavate the contaminated soil to be treated, and then use the appropriate detergent to remove the contaminated soil As a method of washing, it 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 fine soil and granular soil simultaneously with washing in the secondary washing tank, and the granular soil is dehydrated and reduced to the restoration soil. The fine soil is precipitated, flocculated and dehydrated together with the suspended soil discharged from the primary washing tank It is a technology to make waste sludge by the process and neutralize and clean the polluted cleaner.

Such conventional prior arts are characterized in that after the soil particles having a large particle size are selected in the dry separator and the high pressure spraying separator, the cleaning process is performed in the primary and secondary washing tanks, and then the fine soil and floating soil generated in the washing process are discarded 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.

Particularly, in the conventional soil cleaning technology, when the soil to be applied contains a large amount of micro-soil, the purification efficiency is low. This is due to the characteristic of the micro-soil in which the specific surface area is high and the adsorption site is abundant, It is difficult to desorb the oil and the inorganic contaminants through the purification method because the contaminants are more strongly adsorbed.

In addition, in the case of purifying soil contaminated with heavy metals, acid pickling using a large amount of acid was mainly applied so far, which is disadvantageous in terms of economy, environment friendliness, workability and safety.

One aspect of the present invention is to provide a method and apparatus for removing contaminated soil efficiently by removing a heavy metal in a micro-soil slurry by sticking a float to the foam beforehand in a physical treatment process, And a contaminated soil purification system including the multi-stage settling tank.

Another aspect of the present invention is a sludge flotation apparatus in which gravity sedimentation is easily performed according to the grain size by causing the boundary portion to overflow when the soil slurry moves in the first and second monotonous sludge tanks, And to provide a soil purification system.

The present invention relates to a method and apparatus for cleaning a contaminated soil, which is used in a multistage needle barrel in a multi-stage needle barrel cleaning system, Wherein the heavy metal is floated and removed in the manner of attaching to the foam.

In addition, the present invention provides a sludge flotation apparatus comprising: first and second sub-scales each receiving fine soil slurry introduced through pipe-shaped first and second entrances; and first and second sub- The first and second dual flotage vessels are formed to be inclined along the outer circumferential surface of the front end of the first and second subgoal vessels so that the heavy metal foam is discharged by the rotation of the first and second scrapers, And a first and a second foam storage and delivery part for storing heavy metal bubbles discharged from the first and second foam discharge parts and allowing the bubbles to be taken out to the outside. do.

The multistage needle set according to the embodiment of the present invention is used in a contaminated soil purification system. After the washing and sorting process, the micro-soil slurry flowing in the distribution tank is floated and removed in advance Characterized in that the needle barge apparatus is integrally fixed and installed so that gravity precipitation occurs depending on the particle diameter of the fine soil slurry.

In addition, the multistage nitrification tank allows grains to be settled gravity down to the bottom, while granulated gravel and microgrooved soil are sequentially classified and settled, sedimented, and the sedimented granulated gypsum is subjected to a first wet vibration A second monotonous sludge sedimentation unit for sedimenting the fine sludge and discharging the supernatant to return the sedimented fine sludge to the second wet vibration discriminator, And a boundary portion located between the second-stage silt-forming tanks, wherein the fine tortoise slurry is temporarily stagnated in the first-stage tumbling tanks and overflowed to the second-stage tumbling tanks.

Further, a smelting flotation device is disposed at the upper end of the first stage silt bath, and a scum removing device is installed at the upper end of the second stage silt bath.

The contaminated soil purging system of the present invention comprises a feeding device having a feed hopper and an input conveyor for feeding contaminated soil, and a washing device for feeding contaminated soil, which is supplied for washing the contaminated soil supplied from the feeding device, A first mixer for spraying and cleaning the first wet process mixer, and a second wet vibration mixer for receiving the contaminated soil washed in the wet mixer to generate and discharge the first treated tobacco particles, And a first wet vibration discriminator for performing wet particle size separation on the particles introduced from the first wet vibration discriminator to discharge particles having a particle size smaller than the 2a reference particle size to the 1a discharge port and discharging particles larger than the 2a reference particle size to the 1b discharge port The hydrocyclone and the particles introduced from the first hydrocyclone are fed to the particles of the first-b reference particle size or more, A second wet vibration discriminator for discharging the particles smaller than the first reference particle size and discharging the particles smaller than the second reference particle size; And a second hydrocyclone for discharging particles having a particle size larger than that of the first reference particle to the second bout outlet; and a washing / sorting device connected to the first outlet of the first hydrocyclone and the outlet of the second outlet of the second hydrocyclone, A distribution tank for receiving and storing the soil slurry through which the soil slurry is distributed, wherein the soil slurry selectively distributes the physical treatment or the chemical treatment depending on the size and contamination state of the fine soil; A sediment that removes suspended matter by floating in advance by attaching fine heavy metals to the foam in soil And a multi-stage settling tank in which the flotation apparatus is integrally fixed.

In addition, the present invention provides a sludge flotation apparatus comprising: first and second sub-anchors into which a soil slurry introduced through a first and a second inlet of a pipe in a distribution tank flows, respectively; and first and second sub- First and second dual flotines which suspend only the heavy metal in the form of bubbles while stirring the slurry; and a first and a second dual flotation device which slopes along the outer peripheral surfaces of the front ends of the first and second sub- And first and second bubble storing and delivering units for storing heavy metal bubbles discharged from the first and second bubble discharging units to be taken out to the outside .

The first dual flotation vessel includes first and first b pipes for allowing the soil slurry in the first subcontractor to flow through the inside of the first subcontact by the generated vacuum pressure so that the soil slurry is thoroughly agitated, A first driving unit installed at an upper end of the first sub-arrays so that the driving shafts pass through the first and the second b pipes, respectively, and a second driving unit fixed to the lower ends of the first and second driving shafts, A first and a second impellers which are installed in the lower portion of the first and second pipes to allow the fine soil slurry to be agitated; And a first and a second diffusers for allowing the soil slurry to flow into the first sub-tank by negative pressure.

The first driving unit includes a first driving pulley installed in the first driving motor, an 1a driven pulley integrally fixed to the upper end of the first driving shaft passing through the 1a pipe, A first driven pulley integrally fixed to an upper end of a first drive shaft passing through the first pipe and a first belt connecting the first driven pulley and the first driven pulley and the first driven pulley, .

In addition, the multistage hook-and-loop type apparatus is characterized in that the fine gravels introduced from the spinnaker barrels are gravity-settled to the bottom, but granular gravel and micro-gravel are sequentially classified and settled.

In addition, the multistage nitrification tank may include: a first monotonous tank for allowing the granulated gypsum settled and the sedimented granulated gypsum to be transported to the first wet vibration discriminator; and a second monotone gypsum for discharging the sedimented micro- 2 wet-vibration separator, and a second monolithic sandwich which is sandwiched between the first and second monoliths of the first and second stages, wherein the microtispersed slurry is temporarily stuck in the first monolith and then overflowed into the second monolith, And a boundary portion to be formed on the substrate.

The sedimentation tank is a sedimentation tank for sedimenting the upper layer water discharged from the multistage siltation tank to the bottom using a flocculant. The concentrating tank is used for concentrating the fine soil transferred from the sedimentation tank. The dehydrated micro- A dewatering device for generating a cake; and a filtrate storage tank for receiving the filtered solution in the dewatering device.

In addition, the contaminated soil remediation system includes: a pressurized floating tank for receiving water discharged from the settling tank and forcibly floating the oil contained in the water through bubble generation; and a pressurized floating tank for supplying oil separated from the pressurized floating tank to a wet mixer A process water storage tank for supplying water to the first and second wet vibration discriminators, and a replenishing water storage tank for replenishing water to a predetermined water level in the process water storage tank.

The contaminated soil remediation system further includes a chemical treatment facility for chemical treatment, the chemical treatment facility comprising: a first heavy metal inflow stage in which fine soil is introduced for chemical treatment in a distribution tank; A second pickling tank for supplying a pickling agent to the first heavy metal leaching tank, and a second pickling tank for supplying the pickling agent to the first heavy metal leaching tank, A surfactant supply tank for supplying a surfactant to the heavy metal elusion tank; a third hydrocyclone connected to the third heavy metal leaching tank; a sand dewatering device for dewatering particles having a predetermined particle size or more discharged from the third hydrocyclone; A scraper conveyor installed between the third hydrocyclone and the sand dewatering device, and a lime slurry for neutralizing the fine gravel introduced into the sand dewatering device And a storage tank.

Therefore, in the contaminated soil purification system according to the embodiment of the present invention, a sliver flotation device is integrally fixed to the front of the multi-stage silt bath to remove the heavy metal in the micro slip so that it adheres to the foam, So that contaminated soil can be efficiently purified in the process.

In the contaminated soil purification system according to the embodiment of the present invention, when the soil slurry moves in the first and second monotonous tanks, the boundary portion is overflowed so that gravity precipitation is easily performed according to the particle size, So that it can be conveyed to the vibration discriminating device side.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram of a contaminated soil purification system in accordance with an embodiment of the present invention.
2A to 2C are enlarged views of the multistage needle-sinker shown in Fig. 1. Fig.
3A to 3D are enlarged photographs of the multistage needle-sinker shown in Fig. 1. Fig.
FIG. 4 is an enlarged view of a distribution tank, a settling tank, a pressurized float tank, and a process water tank according to an embodiment of the present invention.
Fig. 5 is an enlarged plan view of the wick system shown in Fig. 2a.
FIG. 6 is an enlarged front view of the electromotive wire barbing apparatus shown in FIG. 2C.
FIG. 7 is an enlarged side view of a worm baring apparatus according to an embodiment of the present invention.
FIGS. 8A and 8B are enlarged photographs of a needle barge apparatus according to an embodiment of the present invention. FIG.

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

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram of a contaminated soil purification system in accordance with an embodiment of the present invention. 1, a contaminated soil purification system 10 according to an embodiment of the present invention includes a feeding device 100 for supplying contaminated soil, a washing and sorting device 200 to 200 for cleaning the supplied contaminated soil, 400, a cleaning tank 500 for distributing the polluted soil selected according to the particle size and the contaminated condition to a physical treatment plant / chemical treatment facility, a heavy metal particle floating on the surface of the foam by the needle barge 600, A sedimentation tank 810 for sedimenting fine soil using a flocculant, a concentration tank 820 for concentrating the precipitated micro-soil, a concentrated micro-soil material 820 for concentrating the micro- And a dewatering device 830 for dewatering the water.

The feeding device 100 supplies the soil mixed with the contaminants to the washing and sorting devices 200 to 400 in a predetermined amount. The feeding device 100 includes a feeding hopper 110 to which the contaminated soil is fed, And an input conveyor 120 disposed at a side of the loading hopper 110 to quantitatively transfer the contaminated soil to the washing and sorting apparatuses 200 to 400.

That is, the contaminated soil supplied to the input hopper 110 is supplied to the cleaning and sorting devices 200 to 400 through the input conveyor 120. At this time, the polluted soil does not distinguish its characteristics, but the pollution degree can be determined and the time can be determined according to the pollution degree in the post-process.

The contaminated soil put into the washing and sorting devices 200 to 400 through the feeding device 100 is sorted according to desorption and particle size of oil and heavy metals in the washing and sorting devices 200 to 400. The washing and sorting devices 200, To 400 generate particles to be treated by selecting particles having a predetermined particle size or more and selectively pass only particles smaller than a certain particle size to carry out a subsequent process.

Specifically, the feeding device 100 is connected to the washing and sorting devices 200 to 400 for performing the process of separating the oil and the heavy metal from the soil and improving the efficiency of the purification process.

The washing sorting apparatuses 200 to 400 include a wet mixer 200 for spraying and washing the washing water while conveying the contaminated soil so as to rotate the contaminated soil to wash the contaminated soil supplied from the feeding device 100, A wet vibration discriminator 300 for receiving contaminated soil washed from the cleaned soil 200 and for producing and discharging the treated soil to the outside and discharging the soil having a particle size smaller than the first reference particle size, And a hydrocyclone 400 for separating particles having a second reference particle size or more from the particles provided in the second reference particle size again to select a wet vibration and discharging only particles smaller than the second reference particle size.

Specifically, the soil introduced through the feed conveyor 120 connected to the lower end of the feed hopper 110 is mixed with the washing water in the wet mixer 200.

The wet mixer 200 is a paddle type, and a plurality of paddles 220 are attached to one rotary shaft 210.

Also, the washing water is sprayed through the spray nozzles 230 installed on the wet mixer 200.

Accordingly, when the rotary shaft 210 rotates and the soil is transferred by the paddle 220, the washing water is sprayed from the spray nozzles 230 and mixed to wash the soil.

The wet mixer 200 can control the throughput of the contaminated soil by adjusting the rotation speed of the rotary shaft 210. Here, the washing water supplied to the spray nozzles 230 may be supplied from the process water storage tank 750, as described later.

The soil washed from the wet mixer 200 is introduced into the wet vibration discriminator 300, and the soil is separated and sorted on the basis of a predetermined particle size to generate and discharge the treated soil.

In other words, the wet vibration discriminator 300 allows the soil slurry discharged from the wet mixer 200 to flow, selects particles having a predetermined particle size or more, and passes only fine particles having a particle size smaller than a predetermined particle size so that a subsequent process can proceed.

Particularly, in the wet vibration separator 300, the contaminated soil slurry cleaned in the wet mixer 200 is supplied to particles of the first reference particle size exceeding the reference particle size 1a, And particles smaller than the first reference particle size discharged into the first wet vibration discriminator 310 are introduced after passing through the first hydrocyclone 410 and particles having a particle size larger than the first reference particle size are introduced into the first wet vibration discriminator 310, And a second wet vibration discriminator 320 for generating and discharging the second treated soil and discharging particles below the first b reference particle size.

The first wet vibration discriminator 310 and the second wet vibration discriminator 320 are connected to the hydrocyclone 400 so that the contaminated soil selected based on the first reference particle size, 2 < / RTI > reference granularity, i. E., Based on the 2a and 2b reference granularity.

The hydrocyclone 400 performs wet-type particle separation on the soil introduced from the first wet vibration discriminator 310 to discharge particles having a particle size smaller than the 2a reference particle size to the 1a outlet 411, A first hydrocyclone 410 for discharging the particles to the first bout 412 and a wet cyclone separator 320 for wetting the particles passed through the second wet vibration discriminator 320 to remove particles smaller than the second reference particle size And a second hydrocyclone 420 for discharging the particles larger than the second reference particle size to the second bout outlet 422.

The first hydrocyclone 410 performs grain size separation based on the 2a < th > reference granulometry in a wet manner, wherein the first hydrocyclone 410 is comprised of a first conical tapered portion and a first nozzle portion, A first inlet 413 for entering the cylindrical tangential direction, an 1a outlet 411 connected to a wide inlet side of the first tapered portion, and a first b outlet 412 connected to the first nozzle portion .

That is, water and contaminated soil are introduced into the first inlet 413, and large swirls and small swirls and a vertical flow passing through them in the axial direction are generated in the first tapered portion by the swirling phenomenon and the centrifugal force.

At this time, a difference in centrifugal force occurs due to the difference in weight of the particles, thereby separating the particles having a particle size larger than the 2a reference particle size and the particles having a particle size smaller than the 2b reference particle size.

In other words, particles and water below the 2a reference particle size are discharged through the 1a outlet 411 and particles above the 2a reference particle exit through the 1b outlet 412, where the length of the first taper portion By controlling the entrance area ratio at both ends, it is possible to separate the soil from the desired particle size.

Particles and water less than the 2a reference granularity discharged through the 1a outlet 411 of the first hydrocyclone 410 are supplied to the distribution tank 500 and discharged through the first 2a outlet 412, The particles having a particle size or more are supplied to the second wet vibration discriminator 320.

Of the particles supplied to the second wet vibration discriminator 320, the remaining particles other than the particles generated and exported to the second treated soil are supplied again to the second hydrocyclone 420 to continue high-altitude sorting, So that it can be supplied to the heavy metal forcing tank 811.

The second hydrocyclone 420 performs wet separation to discharge particles below the 2b reference particle size to the 2a outlet 421 and particles above the 2b reference particle size to the 2b outlet 422, This second hydrocyclone 420 has the same composition as the first hydrocyclone 410 and performs wet separation of the granules on the basis of the second b reference granularity, A second inlet 423 formed of a conical second tapered portion and a second nozzle portion and entering in the tangential direction of the cylindrical shape, an 2a outlet port 421 connected to the wide inlet side of the second tapered portion, And a second boutlet 422 connected to the nozzle portion.

Particles smaller than the second b reference particle size discharged to the 2a outlet of the second hydrocyclone 420 are supplied to the distribution tank 500 and particles larger than the second b reference particle discharged to the second b outlet 422 are supplied to the contaminated state (Not shown) to the second wet vibration discriminator 320 or the chemical treatment facility 900 according to the open / closed state of the valve (not shown), so that the sorting / heavy metal leaching process can be performed again.

At the first outlet port 411 of the first hydrocyclone 410 and at the second outlet port 421 of the second hydrocyclone 420, the particles smaller than the 2a reference particle size and the particles smaller than the 2b reference particle size are introduced into the distribution tank 500 ).

The distribution tank 500 is connected to the first outlet port 411 of the first hydrocyclone 410 and the second outlet port 421 of the second hydrocyclone 420 and is connected to the washing / sorting devices 200 to 400 The soil slurry is supplied and stored, and the soil slurry plays a role of selectively distributing physical treatment or chemical treatment depending on the size and contamination state of the fine soil.

Particularly, the distribution tank 500 distributes the fine soil to the facilities of the physical treatment facilities 600 to 800 and the chemical treatment facility 900 according to the size and contamination state of the supplied fine soil. For example, In the case of fine soil with clay contaminated with oil and heavy metals, it can be distributed to physical treatment facilities (600 ~ 800). In the case of fine sand, fine soil contaminated with only heavy metals, To be distributed.

The micro tile passing through the distribution tank 500 is distributed to the physical treatment facilities 600 to 800 and the chemical treatment facility 900. Firstly, And then processed and distributed to the chemical processing facility 900. FIG.

Referring to FIGS. 2A to 2C, 3A to 3D, and 4, a process of treating fine soil with a physical treatment facility in a distribution tank of a contaminated soil purification system according to an embodiment of the present invention will be described. FIGS. 2A to 2C are enlarged views of the multistage needle-sinker shown in FIG. 1. FIGS. 3A to 3D are photographs showing the multistage needle-sinker shown in FIG. 1. FIG. FIG. 3 is an enlarged view showing the distribution tank, the settling tank, the pressurized floating tank, and the process water tank.

As shown in FIGS. 1, 2A to 2C and 4, the physical treatment facilities 600 to 800 of the contaminated soil remediation system according to the embodiment of the present invention may be configured such that the micro- The flocculant is separated from heavy metal particles attached to the surface of the foam in order to remove the floating particles, and the microbes introduced from the float flotation device 600 are gravity settled to the bottom, A sedimentation tank 810 for sedimenting the upper layer water discharged and connected to the multi-stage sedimentation tank 700 to the bottom by using an aggregating agent, a sedimentation tank 810, A concentrating tank 820 connected to the discharging end of the concentrating tank 820 to accumulate the sludge discharged from the sedimentation tank 810 and generate concentrated sludge gravity separated from the sedimentation tank 810, It is configured to include a dewatering device 830 to produce a dewatered cake.

The needle barge apparatus 600 according to the embodiment of the present invention is integrally fixed to the multi-stage needle set tanks 700 at the front end of the multi-stage needle set tanks 700 so that the fine taps supplied from the distribution tank 500 can be sorted And it removes the heavy metal particles attached to the surface of the foam and removes them beforehand.

The present invention will be described with reference to FIGS. 5 to 7. FIG. FIG. 5 is an enlarged plan view of the needle barbing device shown in FIG. 2a, FIG. 6 is an enlarged front view of the needle barbing device shown in FIG. 2c, and FIG. Fig.

5 to 7, a needle barge apparatus 600 of a contaminated soil purification system 10 according to an embodiment of the present invention includes first and second pipe-shaped openings A1 and A2 A first sub-filament 610 and a second sub-filament 620 supplied with the soil slurry introduced through the first and second sub-filaments 610 and 620, respectively; First and second sub-filaments 610 and 620, and second and fourth sub-filaments 610 and 620. The first and second sub-filaments 610 and 620 are slanted along the outer peripheral surfaces of the front ends of the first and second sub-filaments 610 and 620, 2 bubble discharging units 650 and 660 and first and second bubble storing and delivering units 670 and 680 for storing heavy metal bubbles discharged from the first and second bubble discharging units 650 and 660 to be taken out to the outside .

The first subcontractor 610 is supplied with the soil slurry flowing through the first inlet A1 of the pipe shape in the distributor tank 500 to remove the very fine heavy metal in the form of bubbles, And has a cylindrical shape.

The first foam discharging portion 650 is provided so as to be inclined along the outer circumferential surface of the front end of the first sub-filament 610 so that the heavy metal foam overflowing by air can be discharged by the rotation of the first scraper 651 .

The first foam discharge unit 650 allows the foam-type slurry to flow naturally into the space for discharging the heavy metal foam, even if it flows over the first sub-arc 610 at any position.

The first dual flotator 630 includes first and second bipoles 631 and 632 for allowing the soil slurry in the first sub-filament 610 to flow through the inside of the first sub- A first driving part 633 installed and driven at the upper end of the first subsidiary arrays 610 so that the first and the first driving shafts 633A and 633B pass through the first and the first b pipes 631 and 632, 1a and first b drive shafts 633A and 633B and is disposed below the first and the first b pipes 631 and 632 so as to stir the fine soil slurry, The first sub-filament 610 is connected to the lower ends of the first and the first b pipes 631 and 632 by the negative pressure generated in the first and the first b pipes 631 and 632 during rotation of the first and the first b impellers 634 and 635, And a first and a first b diffusers 636 and 637 for allowing the internal soil slurry to enter.

The first and the first b pipes 631 and 632 are fixedly installed by various structures so that the soil slurry in the first sub-arc 610 is introduced into the first sub-arc 610 by negative pressure generated therein when the first and the first b impellers 634 and 635 are rotated So that smooth agitation of the soil slurry is achieved.

The first driving section 633 includes a first driving motor 633C, a first main pulley 633D provided in the first driving motor 633C, a first driving shaft 633A passing through the first a pipe 631, A first b-driven pulley 633E integrally fixed to the upper end of the first b-drive pulley 633E and a first b-drive pulley 633F integrally fixed to the upper end of a first b-drive shaft 633B passing through the first b- And a first belt 633G connecting the first pulley 633D with the first driven pulley 633E and the first driven pulley 633F.

The 1a and 1b drive shafts 633A and 633B are installed in the vertical direction of the first sub-arrays 610. These 1a and 1b drive shafts 633A and 633B are connected to the first and the second b pipes 631 and 632 The first and the first b impellers 634 and 635 are installed so as to be positioned at the bottom, and the soil slurry can be stirred at the time of rotation.

The first driving pulley 633D and the first belt 633G are sequentially rotated by the rotation of the first driving motor 633C to rotate the first and second driven pulleys 633E and 633E, The first driven pulley 633E and the first driven pulley 633F are driven by the first and second drive shafts 633A and 633B via the first and second driven pulleys 633A and 633B, And the first b impeller 635 can be rotated.

The 1a and 1b diffusers 636 and 637 are fixedly secured to the lower ends of the 1a and 1b pipes 631 and 632 which are respectively connected to the rotations of the 1a and 1b impellers 634 and 635 So that the soil slurry in the first sub-arc 610 is introduced by the negative pressure generated in the first and the first b pipes 631 and 632.

The first bubble storage and delivery unit 670 includes a first bubble storage box 671 for storing heavy metal bubbles discharged by the rotation of the first scraper 651, A first spray nozzle 672 for spraying water so that the foam does not overflow, and a first foam outlet tube 673 connected to the lower end of the first foam storage and delivery unit 670 to allow the heavy metal foam to be taken out to the outside .

The second subcontractor 642 is supplied with the soil slurry supplied through the second inlet (A2) of the pipe shape in the distributor tank (500) to float the very fine heavy metal in the form of foam, Shape.

A second foam discharge portion 660 is provided so as to be inclined along the outer circumferential surface of the front portion of the second sub-filament 642 so that the heavy metal foam overflowing by air is discharged by the rotation of the second scraper do.

The second foam discharge unit 660 allows the foam-type slurry to flow naturally into the space for discharging the heavy metal foam, even if the slurry flows over the second sub-arc 642 at any position.

The second dual flotator 640 includes second 2a and second b pipes 641 and 642 for allowing the soil slurry in the second sub-line 642 to flow through the inside of the second sub- A second driving portion 643 driven and installed at the upper end of the second subordinate to pass the 2a and 2b driving shafts 643A and 643B through the 2a and 2b pipes 641 and 642, 2a and 2b impellers 644 and 645 fixed to the lower ends of the 2b drive shafts 643A and 643B and positioned below the 2a and 2b pipes 641 and 642 to stir the fine soil slurry, And the soil inside the first sub-arc 610 by the negative pressure generated inside the 2a and 2b pipes 641 and 642 when the second and third bipples 641 and 642 are rotated, And second and third b diffusers 646 and 647 for introducing the slurry.

The 2a and 2b pipes 641 and 642 are fixedly installed by various structures so that the soil slurry in the second sub-arrays 642 is introduced into the second sub-arrays 642 by negative pressure generated therein when the 2a and 2b impellers 644 and 645 rotate So that smooth agitation of the soil slurry is achieved.

The second driving portion 643 is provided with a second driving motor (not shown), a second moving pulley (not shown) provided in the second driving motor, and a second driving shaft 643A passing through the 2a pipe 641 A second b-driven pulley 643F integrally fixed to an upper end of a second b drive shaft 643B passing through the second b-drive pipe 642 and the second b-drive pulley 643E integrally fixed to the upper end, And a second belt (not shown) connecting the pulley, the second driven pulley 643E and the second driven pulley 643F.

The 2a and 2b drive shafts 643A and 643B are installed in the vertical direction of the second sub-arrays 642 such that the 2a and 2b drive shafts 643A and 643B are connected to the 2a and 2b pipes 641 and 642 And the second and third impellers 644 and 645 are installed so as to be positioned at a lower portion thereof, so that the soil slurry can be stirred at the time of rotation.

Accordingly, the second driving unit 643 can rotate the second driven pulley 643E and the second driven pulley 643F while the second driven pulley and the second belt are sequentially rotated by the rotation of the second drive motor And the second 2a driven pulley 643E and the second driven pulley 643F are driven by the second and third drive pulleys 643A and 643B via the second and third impellers 644 and 645, And can be rotated.

The 2a and 2b diffusers 646 and 647 are fixedly secured to the lower ends of the 2a and 2b pipes 641 and 642 which are in turn connected to the rotations of the 2a and 2b impellers 644 and 645, So that the soil slurry in the second subsidiary line 642 is introduced by the negative pressure generated inside the second 2a and second b pipes 641,

The second bubble storage / delivery unit 680 has a structure similar to that of the first bubble storage / delivery unit 670 described above, and a detailed description thereof is given instead of the first bubble storage / delivery unit 670 described above.

Therefore, the present invention is applicable to the case where the soil slurry provided in the distribution tank 500 is supplied to the first aa pipe 631 and the second aa pipe 631 through the first inlet A1 of the first sub- The soil slurry supplied into the first b pipe 632 and flowing to the first a b impeller 634 and the first b impeller 635 and continuously supplied is filled in the first sub-filament 610, 642 and the second b pipe 642 through the second inlet A2 of the second baffle 642 to flow into the second baffle 644 and the second b impeller 645, The slurry fills the second sub-filament 642.

At this time, the first and second impellers 634 and 635 are rotated by the driving of the first driving unit 633 and the second and third impellers 644 and 642 are driven by the second driving unit 643, (645) is rotated.

As a result, the soil slurry that is raised while stirring on the side of the first and second impellers 634 and 635, the second and third impellers 644 and 645 floats only the heavy metals reacted by the air, It stays in the first sub-filament 610 and the second sub-filament 642 and continues to oscillate.

At this time, the soil slurry flowing inside the first sub-filament 610 and the second sub-filament 642 flows into the interior through the 1a and 1b diffusers 636 and 637 and the 2a and 2b diffusers 646 and 647 The first inlet A1 of the first sub-filament 610 and the second inlet A2 of the second sub-filament 642 and flows into the first and second baffles 634 and 635 ), The second 2a impeller 644 and the second 2b impeller 645, so that the agitation time of the soil slurry is increased and the continuous reaction can be induced.

Accordingly, the heavy metal foam floating by air is foamed in the upper portion of the first sub-filament 610 and the second sub-filament 642, and is foamed to the upper side of the first sub-filament 610 and the second sub- The first bubble discharging portion 670 and the second bubble discharging portion 660 are guided by the rotation of the first scraper 651 and the second scraper guided through the first foam discharging portion 650 and the second foam discharging portion 660, And the soil slurry in the remaining first and second sub-arrays 610 and 642 is discharged to the first and second outlet ports B1 and B2 of the first sub- And then discharged to the multi-stage settling tank 700 through the 2a and 2b outlets B3 and B4 of the sub-arrays 642 or through a common outlet (not shown) passing through the first sub-arrays 610 or the second sub- B5 to the multistage needle set tanks 700. [

As shown in FIGS. 2A to 2C, the multi-stage settling trough 700 is transferred to the multi-tier settling trough 700 by the needle barge apparatus 600, A first monolith sewing tank 710 in which sediment slurry into which the soil slurry is introduced is settled in the first monolith sewing tank 710, a second monolith sewing tank 720 in which fine gravel is settled and the supernatant is discharged, And a boundary portion 730 which is positioned between the second single sinker 720 and allows the soil slurry to stagnate temporarily in the first single needle sinker 710 and overflow to the second single needle sinker 720 .

The first and second temporary settling troughs 710 and 720 have a hopper structure with a vertical light-tight structure and the soil slurry moves in the first temporary tearing trough 710 and the second temporary tearing trough 720 The boundary portion 730 is overflowed so that gravitational precipitation can be easily performed according to the particle diameter.

That is, fine soil is gravitationally settled and separated from the washing water while staying in the first and second monotone set tanks 710 and 720 for about 5 to 10 minutes, respectively. And then a part of the overflows from the boundary 730 to the second single needle sink 720 so that the micro dust is gravity settled in the second single needle sink 720. [

The granulated gypsum or fine gypsum settled at the lower part of the first monoclinic set 710 or the second monoclinic gyro 720 is discharged through the first wet vibration discriminator 310 So that it can be discharged to the second wet vibration discriminator 320.

Particularly, the needle barge apparatus 600 described above is installed at the upper end of the first single needle depositing tank 710 and is subjected to a washing selection process. Then, fine microspheres are selectively adhered to the bubbles in the micro- So that it can be removed by floating in advance.

A scum removing device 760 is installed on the upper portion of the second monocliner 720. The scum removing device 760 effectively removes the scum formed on the water surface of the second monocliner 720, Water quality can be ensured.

The scum removing device 760 includes a plurality of blades 761 connected to a pair of spaced apart chains at both ends and provided in a direction transverse to the second single needle shed 720, The scum formed on the water surface of the second monoclinic sludge tank 720 flows into the scum collecting tank 762 by the moving blade 761 and then flows to the outside of the scum collecting tank 762. [ And is operated in a discharged manner.

The pair of chains to which the blade 761 is connected is moved as the motor coupled to the sprocket connected thereto through the power transmitting means rotates so that the blade 761 is continuously orbitally moved along the chain, .

1, the soil settled in the multi-stage settling tank 700 is conveyed to the first and second wet vibration discriminators 310 and 320, and the supernatant and the very fine soil discharged are supplied to the settling tank 810 do.

The very fine soil and the washing water supplied to the settling tank 810 are flocculated and settled in the settling tank 810 by flocculating agent and the very fine soil is supplied to the dehydrating apparatus 830 through the thickening tank 820 And the contaminated water is supplied to the pressurized floating tank 840 to be reused as washing water.

In this case, the flocculant is supplied through a separate flocculant supply device (not shown). The flocculant and the process water supplied through the flocculant agitator 870 and the process water reservoir 850 are mixed with each other in the flocculant agitator 870, 810). The coagulant is an inorganic electrolyte or an organic polymer compound which precipitates solid particles suspended in a liquid.

The coagulant is an inorganic electrolyte or an organic polymer compound which precipitates solid particles suspended in a liquid.

The precipitate precipitated in the sedimentation tank 810 is supplied to the concentration tank 820 and the discharged supernatant is supplied to the pressurized floating tank 840.

The thickening tank 820 concentrates the fine soil supplied from the settling tank 810 and is conveyed to the dehydrating unit 830. The dehydrating unit 830 dehydrates the concentrated fine soil to discharge it to the dehydrating cake, The filtered solution is received in the filtrate storage tank 831 and transferred to the pressurized floating tank 840 or the process water storage tank 850 and the dewatered cake can be transferred to a separate dewatering cake processing facility.

The pressurized floating tank 840 includes a reservoir 841 having a plurality of cells filled up to a certain level of water discharged from the sedimentation tank 810 and a water tank 842 connected to the reservoir 841, A pressurizing tank 842 for generating bubbles mixed with air, and a bubble discharging unit 843 for discharging bubbles provided on the upper side of the water storage tank 841 to the outside.

The water storage tank 841 has a plurality of cells. On both sides of the plurality of cells, there are provided a supply pipe to which process water is supplied and a drain pipe to drain the process water.

The water tank 841 is provided with a pressurization tank 842 for generating bubbles in the process water. This pressurization tank 842 allows the bubbles with oil to be generated in the process water to be discharged to the drain pipe.

The discharge unit 843 may be configured to include a bubble discharge port for discharging the bubble scraped by the skimmer which scatters floating bubbles while rotating at the upper side of the water storage tank 841.

The treated water discharged from the bubbles is conveyed to the process water reservoir 850 through a drain pipe which is connected to the replenishment water reservoir 860 and the dewatering device 830 as well as the pressurized floating tank 840. [ And serves to supply water to the wet mixer 200 and the first and second wet vibration discriminators 310 and 320.

Accordingly, in the contaminated soil purification system 10 according to the embodiment of the present invention, the physical treatment facilities 600 to 800 for the fine soil and clay include a multi-stage settling tank 700, a settling tank 810, a concentration tank 820, A dewatering device 830, and the like.

Next, a description will be made of a process in which fine soil is treated with a chemical treatment facility in a distribution tank of a contaminated soil purification system according to an embodiment of the present invention.

1, a chemical treatment facility 900 according to an embodiment of the present invention includes a first heavy metal discharge trough 911 into which fine trowel is introduced for chemical treatment in a distribution tank 500, Second and third heavy metal discharge tanks 912 and 913 for efficiently eluting the heavy metal from the fine tuff through the heavy metal discharge trough 911 to generate the third treated trough and the pickling trough 912 for the first heavy metal trough 911, A surfactant supply tank 930 for supplying the surface active agent to the first heavy metal discharge tank 911 and a third hydrotreater 913 connected to the third heavy metal discharge tank 813. [ A sand dewatering device 950 for dewatering particles having a predetermined particle size or more discharged from the third hydrocyclone 940 and a sand dewatering device 950 installed between the third hydrocyclone 940 and the sand dewatering device 950 The scraper conveyor 960, and the fine soil material introduced into the sand dewatering device 950 It is configured to include a lime storage tank 970 to neutralize.

The pickling agent supplied to the first heavy metal adsorption tank 911 may be supplied from the pickling agent feed tank 920.

After passing through the first heavy metal utilization tank 911, the fine soil is further passed through the second and third heavy metal utilization tanks 912 and 913, so that the heavy metal is efficiently eluted and the third treated soil can be generated.

The first to third heavy metal projections 911 to 913 may be made of a material having high corrosion resistance, for example, stainless steel, to prevent corrosion by the pickling agent.

The water discharged from the sand dewatering device 950 may be supplied to the multistage sedimentation tank 810 through a pH adjustment tank 980. The pH adjustment tank 980 may contain small particles introduced from the third hydrocyclone 940, The neutralizer supplied from the reservoir 990 is further connected.

The soil and wastewater having a predetermined particle size or less and supplied to the pH adjustment tank 980 can be neutralized by using washing water mixed with a neutralizing agent. This neutralizing agent neutralizes the acid washing agent supplied to the first heavy metal utilization tank 911, (810).

As a result, the contaminated soil purified through the chemical treatment facility 900 efficiently leaches heavy metals from the micro-soil, and then generates the third treated soil.

As described above, in the contaminated soil purification system according to the embodiment of the present invention, the flocculent flotation apparatus is integrally fixed to the front end of the multistage silt bath, and the heavy metal is previously removed from the micro slip so that the heavy metal is adhered to the foam, It is understood that the basic technical idea is that the contaminated soil can be efficiently purified in the physical treatment process. Therefore, many modifications may be made by those skilled in the art without departing from the scope and spirit of the present invention.

10 ... contaminated soil purification system 200 ... wet mixer
300 ... wet vibration selector 400 ... hydrocyclone
500 ... distribution tank 600 ... the needle barge
700 ... Multistage needle setter 810 ... Settling tank
820 ... thickener 830 ... dehydrator

Claims (14)

delete It is used in the contaminated soil purification system. It is fixed in the multistage sedimentation tank in the multistage sedimentation tank, and is subjected to the washing and sorting process. Then, the microgrowth slurry flowing in the distribution tank is floated Wherein the needle barge arrangement comprises:
The needle barge arrangement comprises:
First and second sub-filaments that are respectively supplied with the fine soil slurry introduced through the first and second inlet-shaped pipes;
First and second dual barge vessels floating only the heavy metal in the form of bubbles while stirring the fine soil slurry in the first and second sub-
First and second foam discharge portions formed to be inclined along the outer peripheral surfaces of the front ends of the first and second sub-filaments to discharge the heavy metal foam by rotation of the first and second scrapers, respectively;
And first and second bubble storage and dispensing units for storing and discharging the heavy metal foam discharged from the first and second foam discharge units,
And wherein the flap is attached to the flap. delete delete delete delete A feeding device having a feed hopper and a feed conveyor for feeding contaminated soil;
A wet mixer for spraying and washing the washing water while conveying the contaminated soil so as to clean the contaminated soil supplied from the feeding device, and a particle mixer for receiving the contaminated soil washed in the wet mixer, A first wet vibration discriminator for generating and discharging the first treated soot and discharging particles smaller than the first reference particle size; and a second wet vibration discriminator for performing wet particle size separation on the particles introduced from the first wet vibration discriminator, A first hydrocyclone for discharging the particles smaller than the first reference particle size to the first discharge port and discharging the particles larger than the second reference particle size to the first b discharge port and a second hydrocyclone for receiving the particles introduced from the first hydrocyclone, A second wet vibration discriminator for generating and discharging the treated soil and discharging particles below the first b reference particle size; And a second hydrocyclone for performing particle size separation on the particles introduced from the separate unit to discharge the particles smaller than the 2b reference particle size to the 2a discharge port and discharge the particles larger than the 2b reference particle size to the 2b discharge port ;Wow,
The first slurry is connected to the outlet 1a of the first hydrocyclone and the outlet 2a of the second hydrocyclone so as to receive and store the slurry through the washing and sorting apparatus. The soil slurry is subjected to physical treatment or chemical treatment A dispensing tank for selectively dispensing treatment,
And a multi-stage settling trough in which microspheres fed from the dispensing tank are floated in advance in such a manner that fine heavy metals are adhered to the bubble to physically treat the micro tile,
The needle barge arrangement comprises:
First and second sub-filaments into which the soil slurry introduced through the first and second pipe-shaped inlets in the distribution tank respectively flows,
First and second dual barge vessels floating only the heavy metal in the form of bubbles while stirring the fine soil slurry in the first and second sub-
First and second foam discharge portions formed to be inclined along the outer peripheral surfaces of the front ends of the first and second sub-filaments to discharge the heavy metal foam by rotation of the first and second scrapers, respectively;
And first and second bubble storage and dispensing units for storing and discharging the heavy metal foam discharged from the first and second foam discharge units,
Wherein the contaminated soil purification system comprises: 8. The method of claim 7,
The first dual flip-
A first and a second pipe for introducing the soil slurry into the first sub-tank by the vacuum pressure generated therein,
A first driving unit installed at an upper end of the first sub-arrays so that the first and the second driving shafts pass through the first and the first b pipes, respectively,
A first and a second impellers fixedly installed at the lower ends of the first and the first driving shafts and disposed at lower portions of the first and second pipes to allow the fine soil slurry to be agitated;
A first baffle connected to the lower ends of the first and the first b pipes to allow the soil slurry to flow into the first sub-fins due to negative pressure generated in the first and the first b pipes when the first and second baffles rotate, 1a and a first b diffuser
Wherein the contaminated soil purification system comprises: 9. The method of claim 8,
Wherein the first driving unit includes:
A first drive motor;
A first driven pulley installed in the first drive motor,
A first driven pulley integrally fixed to an upper end of a first drive shaft passing through the first pipe, and a first driven pulley integrally fixed to an upper end of a first drive shaft passing through the first b pipe,
A first belt connecting the first main pulley, the first driven pulley and the first driven pulley to each other;
Wherein the contaminated soil purification system comprises: 8. The method of claim 7,
The multi-
Characterized in that fine soil particles introduced from the electromyographic flotation device are gravity-settled to the bottom but granular soil and micro-soil are sequentially classified and settled. 11. The method of claim 10,
The multi-
A first monotone yarn tank in which the granulated gypsum is settled and the sedimented granulated gypsum is conveyed to the first wet vibration separator;
A second monolithic sludge tank for sedimenting the fine sludge and discharging the supernatant, wherein the sedimented fine sludge is conveyed to the second wet vibration sorter,
And a boundary portion positioned between the first and second stages of the silt bath to allow the fine soil slurry to stagnate for a moment in the first single needle thread bath and to overflow to the second single needle thread bath. Soil cleansing system. 8. The method of claim 7,
A sedimentation tank connected to the multistage nitrification tank for discharging the upper layer water discharged to the bottom using an aggregating agent;
A concentrating tank for concentrating fine soil transferred from the settling tank,
A dewatering device for dewatering the condensed fine soil discharged from the concentrating tank to produce a dehydrated cake;
A filtrate storage tank for storing the filtered solution in the dehydration apparatus;
Wherein the contaminated soil purification system comprises: 13. The method of claim 12,
The contaminated soil purification system includes:
A pressurized floating vessel for receiving the water discharged from the settling tank and forcibly floating the oil contained in the water through bubble generation;
A process water storage tank for receiving water separated from the pressurized floating tank and supplying water to the wet mixer and the first and second wet vibration discriminators,
And a replenishing water storage tank for replenishing water so that the water in the process water storage tank becomes a certain water level
Further comprising the steps of: 8. The method of claim 7,
The contaminated soil remediation system further includes a chemical treatment facility for the chemical treatment,
The chemical treatment facility includes:
A first heavy metal feedstock into which fine soil is introduced for chemical treatment in the distribution tank;
Second and third heavy metal tanks for efficiently eluting the heavy metals from the fine toss after passing through the first heavy metal forging to produce the third treated soil;
A pickling agent supply tank for supplying a pickling agent to the first heavy metal eluting vessel;
A surfactant supply tank for supplying a surfactant to the first heavy metal eluant tank;
A third hydrocyclone connected to the third heavy metal leaching tank,
A sand dewatering device for dewatering particles having a predetermined particle size or more discharged from the third hydrocyclone,
A scraper conveyor installed between the third hydrocyclone and the sand dewatering device,
And a slaked lime storage tank for neutralizing the fine soil introduced into the sand dewatering device.

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