KR100847262B1 - Soil washing apparatus - Google Patents

Abstract

An apparatus for washing soil continuously is provided to improve agitation performance and biochemical treatment capability of the washing solution and the soil having the contaminants primarily removed therefrom and treat the contaminated soil continuously by primarily removing contaminants from contaminated soil and transferring the mixture through a stairway shaped structure step by step while agitating the contaminated soil and a washing solution. An apparatus for washing soil continuously comprises a sorting unit, an adsorption unit, and an agitation unit. The sorting unit includes a sorting casing(10) and a transfer casing(20). The sorting casing includes: a rotary mesh drum(11) installed therein in a way that the rotary mesh drum is rotationally supported by bearings(12), the rotary mesh drum having inner vanes(13) formed on an inner peripheral surface thereof and outer vanes(14) formed on an outer peripheral surface thereof; and a hopper(16) having a surfactant nozzle(15). The transfer casing includes: a transfer shaft(22) on which a transfer screw(21) is formed, and which is rotated by a low speed motor(23) and axially supported to a bearing(24); a pneumatic pipe(61) formed in the transfer shaft and connected to a pneumatic pressure generator(60) by a hose; and a plurality of pneumatic nozzles(62) radially formed on an outer peripheral surface of the pneumatic pipe. The adsorption unit includes a porous screen mesh(30) formed in the middle section of the transfer casing, a sealing cover(33) for sealing the screen mesh to form an adsorption chamber(32) in which an adsorption cloth(31) is placed between the sealing cover and the screen mesh, a vacuum adsorber(40) connected to the sealing cover by a hose(41), and an oil-water separator(42) connected to the vacuum adsorber. The agitation unit includes an agitation casing(50) having a plurality of agitation chambers(53) formed therein, agitation shafts(52) installed in the agitation chambers thereof, agitation vanes(51) formed on outer peripheral surfaces of the agitation shafts thereof, and washing solution nozzles(56) formed on top parts thereof.

Description

Soil washing apparatus

The present invention relates to a continuous soil washing apparatus, and more particularly, to continuously filter the stones and foreign substances while adding a surfactant to the contaminated soil to increase the fluidity and then quantitatively transport and inject high pressure air into the contaminated soil. By removing the pollutants by vacuum adsorption, and actively transferring the soil step by step while stirring the soil with the washing solution, the agitation and biochemical treatment of the soil from which the pollutants were first removed and the biochemical treatment ability were improved. It relates to a continuous soil washing apparatus that can be treated continuously.

Soil washing is the separation of organic pollutants and heavy metals from soil particles by using a cleaning agent to weaken the surface tension of harmful organic pollutants bound to soil particles or to elute them by increasing the solubility of heavy metals. Say. Contamination when soils on the surface or basement are contaminated due to leakage of contents from oil storage facilities such as gas stations, reservoirs, petrochemical plants, or factories or storage facilities that handle organic chemicals, or by the leakage of installation structures. In order to restore the soil, organic pollutants can be treated with on-site purification facilities while they are left in the basement floor, or they can be excavated and pumped underground to the ground for physicochemical or biological purification. have.

As a device for excavating soil to remove contaminants, domestic practical registration No. 410721 carries one washing screw for transporting the soil from one end of the soil into the other end where the soil is discharged while spraying the washing water onto the soil. The rear screw does not change the pitch, and the diameter and pitch of the front screw decreases as the pitch goes forward to increase the mixing efficiency with the wash water.

However, since the conventional washing apparatus continuously pushes the contaminated soil from the front and rear screws, the pores of the soil are narrowed, so that the mixing ratio of the wash water and the soil is substantially reduced, and only the push-out structure is expected to improve the purification performance of the contaminated soil. It was hard to do.

Korean Patent No. 404738 is configured in a double tube form inside the inner casing is provided with a screw for pushing the contaminated soil and the outer casing is composed of a tub rotating in the reverse direction with the screw to wash the contaminated soil step by step, but also this Because the outer cylinder is composed of a double pipe and the outer cylinder is rotated, the structure is complicated, and there is no configuration that widens the pores by crushing or spreading the contaminated soil, so it is difficult to expect a great mixing performance of the washing liquid and the contaminated soil.

The present inventors have applied for a soil washing apparatus in accordance with the patent application No. 2008-28384 in view of the conventional problems, the contents of which is to increase the fluidity by adding a surfactant while crushing the contaminated soil to widen the voids and then transfer the transfer screw By vacuum adsorption of the contaminated soil that adheres to the casing wall while quantitatively transporting it, the pollutant is first removed from the soil, and then the washing liquid is added and stirred while spreading the soil. The processing power is to be improved.

The present invention is to improve the washing apparatus of the inventors of the present application, the object of the present invention is to filter the soil and soil by continuously adding a surfactant to the contaminated soil to increase the fluidity and then quantitatively transport the high-pressure air flow fluid soil Agitating and biochemical treatment of the soil and washing solution from which the pollutant was first removed by step-by-step transfer of the soil by vacuum adsorption, while gradually removing the contaminants while actively removing the pollutants. It is to provide a continuous soil washing apparatus that can improve the capacity and process the soil continuously.

The present invention increases the fluidity of the contaminant by introducing a surfactant into the hopper into which the contaminated soil is introduced, the transfer casing connected to the hopper is provided with a transfer screw for continuously discharging the contaminated soil in close contact, rotating the transfer screw Pneumatic generator for injecting high-pressure air into the feed shaft is provided to accelerate the separation of pollutants and soil during transport, and the outer periphery of the transport casing is provided with adsorption means for vacuum adsorption of the pollutant separated from the polluted soil discharged; , The stirring casing connected to the transfer casing is provided with a plurality of stirring chambers, and stirring blades rotated at high speeds in the respective stirring chambers to disperse the soil discharged in close contact with each other, and the outer periphery of the stirring casing includes: It is characterized by having a washing liquid nozzle for spraying the washing liquid into the contaminated soil.

According to the present invention, when the soil is introduced into the rotating mesh, the soil is moved toward the outlet by the wings inside the mesh tube, so that the contaminated soil falls into the sorting box and foreign substances and stones are discharged, so that separate contaminated soil can be continuously selected. The contaminated soil dropped into the sorting box is sent to the transfer casing of the next process, and the surfactant is introduced to separate the pollutants in the soil.

In addition, high-pressure air is injected into the screw shaft and discharged into the transfer casing in the process of quantitatively conveying the contaminated soil mixed with surfactant, so that the contaminants having fluidity are easily separated from the soil and separated, and the contaminated soil is transferred to the casing. In the process of being discharged on the wall, the pollutant is adsorbed in the vacuum adsorber, so the pollutant is removed first.

Therefore, the contaminated soil is transported to the stirring means of the next process with most of the highly fluidized sources of contaminants removed thereafter, and is discharged while spreading widely inside the stirring casing by stirring blades rotated at high speed, and the stirring casing is a stepped stirring chamber. It is formed in stages and the stirring blades are installed in each of the stirring chambers, so that the washing liquid is sprayed, so that the soil and the washing liquid are mixed well, and thus the biochemical decomposition of the pollutant is efficiently performed.

And since the washing apparatus of the present invention can be mounted on the vehicle and moved, the application of the field is quick, and when it is equipped with its own wheel, it can be moved by magnetic force.

1 is a conceptual diagram of a washing apparatus of an embodiment of the present invention, Figure 2 is a cross-sectional view taken along line AA of FIG. The washing apparatus of one embodiment of the present invention is divided into a sorting means, an adsorption means and a stirring means.

The sorting means is to separate the contaminated soil from stones and foreign substances by digging soil in the contaminated area, and to break up finely in the process of separating and transporting to increase the porosity and to activate the fluidity of the contaminated source by adding a surfactant. The sorting casing 10 is provided.

The sorting casing 10 is provided with a rotating mesh (11) rotatably supported by a bearing (12) therein, the inner circumferential surface of the rotating mesh (11) is provided with an inner blade (13) for transferring the contaminated soil toward the discharge port and On the outer circumferential surface, when the contaminated soil filtered by the rotating mesh 11 falls into the sorting casing 10, an outer wing 14 for conveying it toward the hopper 16 is provided. And the hopper 16 is provided with a surfactant nozzle 15 for spraying the surfactant to the soil contaminated below.

The transfer casing 20 connected to the hopper 16 is provided with a feed shaft 22 having a feed screw 21 therein. The feed shaft 22 is rotated by the low-speed motor 23, the end of which is axially supported by a bearing 24 supported by a cross-shaped rib 25, which does not interfere with the discharge of contaminated soil, and the feed screw 21 It is composed of a spiral having a diameter close to the inner peripheral surface of the transfer casing 20. Therefore, the conveying screw 21 continuously conveys the contaminated soil quantitatively and allows the contaminated soil being conveyed between the conveying screws 21 to be brought into close contact with the inner wall of the conveying casing 20.

The feed shaft 22 is formed with a pneumatic tube 61 into which high pressure air is injected, and a plurality of pneumatic nozzles 62 are connected to the pneumatic tube 61 to inject high pressure air into contaminated soil on the outer circumferential surface thereof. Dogs are provided. In addition, the pneumatic pipe 61 is connected to the external pneumatic generator 60 and the hose so that the separation of contaminants and soil in the soil contaminated with the surfactant is promoted by the high pressure air.

Adsorption means is for adsorbing the contaminated source with increased fluidity from the contaminated soil passing through the transfer casing 20, the porous screen net 30 is provided in the intermediate section of the transfer casing 20 and the screen net 30 A sealing cover 33 is provided to enclose and seal the screen net 30 so that the adsorption chamber 32 in which the adsorption cloth 31 is disposed is formed between the screen and the screen.

The sealing cover 33 is divided so as to be divided up and down on both sides of the hinge 34, as shown in Figure 2 is configured to replace the suction cloth 31, the fixing bolt 35 and the nut 36 is fixed to the transfer casing 20. The airtight cover 33 is connected to the vacuum adsorber 40 and the hose 41, and the oil / water separator 42 is connected to the vacuum adsorber 40 and stores and stores the adsorbed contaminant for each component.

3 is a cross-sectional view taken along the line B-B of Figure 1, the stirring means for stirring with the washing liquid while dispersing the contaminated soil quantitatively discharged through the transfer casing 20, the contaminated soil discharged from the transfer casing 20 The stirring casing 50 receives a plurality of stirring chambers 53 connected in a stepwise manner, and these stirring chambers 53 are supported by a high-speed motor 54 and a bearing 55 while being independently rotated by a stirring shaft ( 52).

And the outer circumferential surface of each stirring shaft 52 is provided with agitating wings 51 to spread while sending the contaminated soil falling into the corresponding stirring chamber 53 to the outlet, the stirring shaft 52 is connected by a chain or belt one You can also rotate at the same time with the motor of.

The upper portion of the stirring casing 50 may be configured to be opened or closed by a separate cover to facilitate the repair and inspection of the stirring blade 51 and the stirring shaft 52, the stirring casing 50 A plurality of washing liquid nozzles 56 for spraying the washing liquid are provided on the upper portion of the washing liquid, and the washing liquid is sprayed into the contaminated soil which is transported to the discharge port. The washing liquid is stirred well with the contaminating soil to activate the biochemical decomposition of the contaminant.

Soil continuous washing apparatus of an embodiment of the present invention configured as described above is introduced into the rotary mesh (11) when the contaminated soil from the contaminated area is transported to one side by the inner blades (13) to spread the finely crushed soil between them As the voids are enlarged, stones and foreign substances are discharged and the contaminated soil is filtered out of the rotating mesh 11 and falls into the sorting casing 10.

At this time, the contaminated soil accumulated in the sorting casing 10 by the outer blades 14 formed on the outer circumferential surface of the rotating mesh 11 is transferred to the hopper 16 and mixed with the surfactant sprayed from the lower surfactant nozzle 15. The fluidity of the pollutant is increased. In addition, the contaminated soil into which the surfactant is introduced is discharged by the conveying screw 21 for quantitatively conveying the contaminated soil in which the high pressure air of the pneumatic generator 60 injected into the conveying shaft 22 is conveyed from the pneumatic nozzle 62. When sprayed to, the flowable pollutants are easily released from the contaminated soil.

And the soil is discharged in close contact with the inner circumferential surface of the transfer casing 20 is passed through the screen net 30, the screen net 30 is filtered because the soil is composed of a size of the mesh to pass through the fluid pollution source vacuum When the adsorber 40 is operated, a vacuum is applied to the adsorption chamber 32, so that pollutants and surfactants having increased fluidity in the contaminated soil are adsorbed to the vacuum adsorber 40 through the adsorption cloth 31 of the adsorption chamber 32. Thereafter, it is stored in the oil / water separator 42 and separated for each component.

The adsorption cloth 31 is for protecting the vacuum adsorber 40 by catching small soil particles other than the pollution source, and some contamination sources are also filtered out of the adsorption cloth 31. The adsorption cloth 31 should be replaced when a lot of foreign matters to drop the adsorptive force, and open and replace the airtight cover 33, which opens on both sides as shown in FIG.

The soil contaminated with the primary source of contaminant while passing through the transfer casing 20 is finally agitated and discharged from the washing liquid in the stirring casing 50. The stirring casing is provided with a cascading stirring chambers 53 in series, and stirring blades 51 are formed in each of the stirring chambers 53 so as to be rapidly rotated by the high-speed motor 54. Scatter from and distribute to. Therefore, as the contaminated soil is dispersed again while passing through the transfer casing 20, the voids are reopened, so that the stirring and infiltration with the washing liquid sprayed from the washing liquid nozzle 56 are quickly performed, and the washing liquid is evenly introduced between the contaminated soil to contaminate the source. Biochemical degradation of scavenger is activated and soil purification is improved.

In addition, since the stirring chamber 53 of the stirring casing 50 is inclined stepwise, the contaminated soil flows smoothly without stagnation in the stirring casing 50, so that the contaminating soil may be continuously washed.

1 is a conceptual diagram of a washing apparatus of an embodiment of the present invention

2 is a cross-sectional view taken along the line A-A of FIG.

3 is a cross-sectional view taken along the line B-B of FIG.

<Code Description of Main Parts of Drawing>

10: sorting casing 11: revolving mesh

12: bearing 13: inner wing

14: outer wing 15: surfactant nozzle

16: Hopper 20: transfer casing

21: feed screw 22: feed shaft

23: low speed motor 30: screen network

31: adsorption cloth 32: adsorption chamber

33: airtight cover 40: vacuum adsorber

50: stirring casing 51: stirring blade

52: stirring shaft 53: stirring chamber

60: pneumatic generator 61: pneumatic pipe

62 pneumatic nozzle

Claims (4)

Increasing the fluidity of the contaminant by injecting surfactant into the hopper into which contaminated soil is introduced, The transfer casing connected to the hopper is provided with a transfer screw for continuously discharging contaminated soil and a pneumatic generator for injecting high pressure air into the transfer shaft for rotating the transfer screw to separate the contaminants and soil being transferred. Accelerate,  The outer periphery of the transfer casing is provided with adsorption means for vacuum adsorption of the pollutant source separated from the discharged soil, Stirring casing connected to the transfer casing is provided with a plurality of stirring chamber, the stirring blades are rotated at high speed in each of the stirring chamber to disperse the soil discharged in close contact, the soil on the outer periphery of the stirring casing Soil continuous washing apparatus characterized in that the washing liquid nozzle is provided to spray the washing liquid. The method of claim 1, The adsorption means includes a screen net formed in a portion of the transfer casing, a sealed cover having an adsorption cloth therein while surrounding the screen net, and a vacuum adsorber connected to the sealed cover to vacuum adsorb the contaminant separated from the contaminated soil. Soil continuous washing apparatus, characterized in that configured. The method of claim 2, Stirring chambers of the stirring casing is connected in a step shape soil continuous washing apparatus characterized in that the contaminated soil to be discharged continuously without falling down step by step. The method of claim 3, wherein The sorting casing connected with the hopper is provided, Rotating mesh is provided that is rotated in the sorting casing, The inner circumferential surface of the rotating mesh is provided with an inner wing for transporting the contaminated soil to one side to discharge stones and foreign substances and to filter the contaminated soil and drop it into the sorting casing. Soil continuous washing apparatus characterized in that the outer circumference of the rotating mesh is provided with an outer wing for transporting the soil contaminated by the sorting casing to the hopper.

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