KR200250277Y1 - Soil washing apparatus - Google Patents

Abstract

The present invention relates to a soil washing apparatus, comprising: a mounting base (10) coupled to a hinge member (2) with one side of a bottom surface rotatable on a base (1) designed to be seated from the ground; Height adjusting means (20) connected to the upper side of the base (1) and the bottom of the mounting table (10) for adjusting the height of one side of the mounting table (10); One side is fixedly installed on the plurality of support (11) provided from the mounting table 10, the pre-washing tank 30 for receiving the soil contaminated from the outside to wash first; A first driving part 40 connected to the pre-wash tub 30 by a chain on the mounting table 10; A main washing tank (50) rotatably installed on the mounting table (10) to receive a portion of the pre-cleaning tank (30) for washing the contaminated soil secondarily; A roller member (60) installed on the mounting table (10) to support the main washing tank (50); A second driving part 70 connected to the main washing tub 50 by a chain on the mounting table 10; It is installed on the mounting table 10 and the washing water injection nozzle 81 is wired into the main washing tank 50, characterized in that consisting of the pumping means 80 for supplying the washing water, continuous soil through the pre-wash bath Soil is supplied at the same time, and the surfactant and washing are simultaneously transported, and the washing water is separated from the soil by secondly washing the contaminated soil, which is first washed with the washing water supplied to the main washing tank, so that the interface of soil pollution is maintained. If the power is reduced to the maximum and the lottery can be returned to the original soil, such a process can continuously supply the contaminated soil, thereby improving the treatment capacity of the contaminated soil due to the restoration of soil pollution, and the washing device can be mounted on the vehicle. Therefore, the workability due to the transfer also has an effect that can be significantly improved.

Description

Soil washing apparatus

The present invention relates to a soil washing apparatus, and more particularly, in the cleaning of contaminated soil, the continuous supply of soil, the washing is performed at the same time, and the amount of surfactant required for washing is minimized, in particular oil It is to improve the treatment capacity and performance that can be effectively applied to the restoration of the site contaminated with the compound.

In case of soil pollution, once contaminated, it may adversely affect the surface water and groundwater quality, causing secondary pollution to the surrounding environment. Therefore, contaminated soil must be purified and restored at the site as soon as possible.

In view of the above, the soil washing technique was first developed in the United States in the late 1970s and is currently one of the most frequently used patent technologies in many countries, including the United States, Germany and the Netherlands. Extensive

Due to its wide range of applications, it is recognized as one of the most efficient and economically efficient purification methods in view of the current situation in which a large amount of various organic pollutants and heavy metals are emitted.

Recently, soil pollution in various oil handling plant areas including oil refineries has been a serious social problem, and efforts have been made to efficiently excavate and restore such soils.

In general, soil washing techniques can be largely divided into Ex-situ washing method and In-situ washing method.

The ex-situ washing technique is also commonly referred to as soil washing, and after grasping the distribution of substances in soil and physical / chemical characteristics of the soil to excavate the contaminated soil in the treatment range, it is contaminated using an appropriate washing solution. Soil washing is divided into one-site treatment and off-site treatment.

The in-situ washing technique circulates the washing water in the soil by installing a washing solution injection well, a washing solution discharge well, a effluent treatment facility, a pump and instrumentation facility, and a volatile material treatment facility without polluting the soil. The treatment time is long, and the soil voids are clogged, which makes it difficult to recover the washing solution in the washing apparatus.

Soil washing technique depends on the degree of mixing of soil with pollutants, particle size distribution and specific gravity.

Simple washing process steps, such as excavation and transportation of soil soils; A residue treatment process for removing bulky confinement material or lumped soil; Process for separating contaminants from soil using cleaning agents and mechanical friction; Effluent aftertreatment process; It is a process of covering or recycling the purified soil.

However, since the soil washing using the cleaning agent and mechanical friction in the above process is repeatedly performed to the set reference value of the restored soil after one process, it is pointed out that the use of the surfactant required for washing is excessive. There was a disadvantage that the spill was not smooth.

In addition, the existing washing equipment has to perform a repetitive process, so the processing speed and the performance of the equipment does not reach the expected degree, the workability is very poor, and the installation and installation of the device because it is installed in each region There was a problem with recovery.

The present invention has been made in order to solve the conventional problems, it is easy to move to the contaminated soil restoration site, while the continuous washing operation is performed at the same time according to the supply of contaminated soil can be discharged separately from the washing water and the restored soil The purpose is to provide a soil washing device.

According to the present invention for achieving the above object, the base is designed to be seated from the ground, one side of the bottom is rotatably coupled to the hinge member installed; A height adjusting means connected to an upper side of the base and a bottom of the mounting table to adjust the height of one side of the mounting table; One side is fixedly installed on a plurality of supports provided from the mounting table, the pre-washing tank for washing the primary receiving the contaminated soil from the outside; A first driving unit connected to the pre-wash tub by a chain on the mounting table; A main washing tank rotatably installed on a mounting table to receive a portion of the pre-cleaning tank to secondly clean the contaminated soil; A roller member installed on the mounting table to support the main washing tank; A second driving unit connected to the main washing tub by a chain on the mounting table; It is achieved by providing a soil washing apparatus which is installed on the mounting table and the washing water injection nozzle is wired into the main washing tank and configured by pumping means for supplying the washing water.

1 is a front view showing the present inventors washing apparatus,

Figure 2 is a cross-sectional view taken along the line A-A of Figure 1 for showing a progress path of contaminated soil according to the present invention,

3 is a cross-sectional view showing a washing tank according to the present invention;

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

Figure 5 is a graph showing the comparison of the washing efficiency by the rotational speed of the washing tank according to the present invention.

Figure 6 is a graph showing a comparison of the ratio change of washing water and soil according to the present invention.

Figure 7 is a graph showing the comparison of the washing efficiency of on-site diesel polluted soil according to the present invention.

◎ Explanation of symbols for main part of drawing

10: mounting table 20: height adjustment means

30: pre-clean bath 32: feed screw shaft

40: first driving unit 50: main washing tank

52: spiral wear part 53: wing

54: filter network 60: roller member

70: second drive unit 80: pumping means

81: spray nozzle

Hereinafter, with reference to the accompanying Figures 1 to 7 will be described in detail with respect to the present invention.

Attached Figure 1 is a front view showing the present invention the washing device, the soil washing device of the present invention is installed on the base 1 is designed to be seated from the ground side one side coupled to the hinge member (2) rotatably installed ( 10 is provided, the height adjusting means 20 for adjusting the height of one side of the mounting table 10 is connected between the upper side of the base 1 and the bottom of the mounting table (10).

The height adjusting means 20 to adjust the height by applying a manual screw jack or hydraulic jack.

In addition, on the plurality of supports 11 provided from the mounting table 10, the pre-washing tank 30 for receiving the soil contaminated from the outside and being primarily washed is fixedly installed.

The pre-wash tank 30 is a cylindrical body 31 provided with an inlet 31a for receiving soil on one side and a discharge port 31b for discharging the soil, and both ends are rotatably supported in the body 31. Consisting of the feed screw shaft 32 for transferring the installed and introduced soil in one direction, and the sprocket 33 is coupled to one end of the feed screw shaft 32 to receive power.

In addition, the specification of the pre-wash tub 30, the total length is 740mm, the diameter of the body 31 is 40mm, the pitch interval of the feed screw shaft 32 installed therein is about 16mm.

The first driving unit 40 is connected to the pre-wash tub 30 by a chain on the mount 10, and secondly washes the contaminated soil on the mount 10 to accommodate a part of the pre-wash tank 30. Main washing tank 50 to be rotatably installed.

Looking at the main washing tank 50 is installed to accommodate a portion of the pre-washing tank 30, one side has a cylindrical body 51 of the open, spirally formed in the longitudinal direction of the inner diameter of the body 51 in one direction soil A wing piece 53 for interfering soil formed at equal intervals on the circumference between the helical wear portion 52 and the helical wear portion 52 formed on the inner diameter of the body, Filter nets 54 for filtering wash water and installed at equal intervals on one side circumference of the body 51 and guide rings 55 installed on the outer circumference of the body 51 and guided to the roller member 60. ) And a sprocket 56 coupled to one end of the body 51 to rotate the body 51 from the second driving part 70.

The main body 51 of the main washing tank 50 is 500mm in length, the cylindrical body diameter is 140mm, the pitch spacing of the spiral wear portion 52 integrally formed on the inner wall in the form of a circular tube is 28mm, the body 51 The length of the spiral wear portion from the inner wall of the) was 25 mm so that the wing piece 53 positioned between them had a 45 ° angle when the body was viewed from the center.

On the other hand, a roller member 60 for supporting the main washing tank 50 is installed on the mounting table 10, and the second driving unit 70 connected to the main washing tank 50 by a chain on the mounting table 10 is installed. Is located.

The first driving unit 40 and the second driving unit 70 include drive motors M1 and M2 in which the reduction gear G is attached.

In addition, on the mounting table (10), the washing water injection nozzle (81) is wired into the main washing tank (50), and a pumping means (80) for supplying the washing water is installed and receives the soil washed from the main washing tank (50). The discharge port (3) for discharging the soil into the furnace and the drain (4) for receiving the waste water to receive the washing water separated from the soil is installed.

Referring to the action and effect on the soil washing apparatus of the present invention configured as described above are as follows.

First, the present invention soil washing apparatus can be mounted on the transport vehicle can be easily moved from the region to restore the contaminated soil can be installed in the working position.

Due to the excavation of the contaminated soil, the first large volume of the constriction or the agglomerated soil may be operated in a separator installed around the supply of contaminated soil to the washing apparatus of the present invention.

Before supplying the contaminated soil, the surfactant required for washing is mixed and supplied in advance, and is contaminated by the inlet 31a provided in the body 31 of the pre-wash tank 30 as shown in FIG. 1. The soil can be fed in the form of infusion.

The soil introduced into the body side inlet 31a of the prewash tank 30 is driven to have a rotation ratio set in the reducer G through the drive motor M1 of the first driving unit 40 on the mounting table 10, and the reducer (G) drives the sprocket 33 provided on the outside of the body 31 by the chain, and transfers the contaminated soil in one direction in accordance with the rotational drive of the feed screw shaft 32 installed on the inside by the drive of the sprocket 33 You can do it.

Soil interfering with the transfer screw shaft 32 along the inside of the pre-wash tank 30 moves together to reduce the interfacial tension of the contaminants from the soil due to the chemical reaction of the mixed surfactant.

As described above, the contaminated soil transported to the end along the pre-wash tank 30 is discharged into the main wash tank 50 through the discharge hole 31b formed in the body.

The pre-cleaning tank is the body 51 by the rotational drive of the sprocket 56 installed on the outside of one end of the body 51 by the drive motor M2 and the reducer G of the second drive unit 70 installed on the mounting table (10). The roller member 60 installed on the mounting table 10 guides the guide ring portion 55 protruding from the outer side of the rotating body 51 to smoothly rotate the stable body 51. It is possible to support with driving.

On the other hand, the contaminated soil discharged through the body 51 side discharge port 31b of the pre-wash tank 30 in the deep inside the main wash tank 50 is a spiral wear portion formed in the inner diameter of the main body 51 of the main wash tank 50 Along the 52 is transported in one direction so as to be opposite to the traveling direction of the contaminated soil of the rinse tank 30.

At one end of the pre-wash tank 30 accommodated in the main washing tank 50, the washing water from the pumping means 80 installed from the mounting table 10 through the injection nozzle 81 connected to the pumping means, the inside of the main washing tank 50 At a deep point, the washing water is sprayed to be mixed with the soil discharged from the prewash tank 30.

The contaminated soil discharged from the discharge port 31b of the pre-wash tank 30 is mixed with the washing water supplied from the inside of the main washing tank 50 by the pumping means 80 while the spiral wear portion of the main washing tank 50 ( 52).

The contaminated soil transported along the naked wear portion 52 serves to separate contaminants due to washing water at the same time as the transport. That is, the washing water separates the contaminants by rinsing the contaminated soil, which has completed the first washing process, together with the surfactant mixed with the soil due to the washing water.

In the rinsing action as described above, the soil transported to the open portion of the main washing tank 50 interferes with the wing piece 53 formed between the spiral wear portion 52 and the spiral wear portion 52. This further weakens the interfacial tension of contaminants from the soil, thus maximizing the cleaning effect during transfer.

Transfer of the soil mixed with the washing water along the spiral wear part 52 is carried out in proportion to the supply of the contaminated soil from the pre-wash tank 30, and the washing water is provided in the body 51 of the main washing tank 50. The washing water can be discharged to the outside through the filter network 54, the washing water can be separately collected along the drain hole (4) installed on the mounting table (10).

On the other hand, the washing is completed and finally the soil coming out of the open portion of the main washing tank 50 is treated to pass through the drain hole 4 installed on the mounting table 10 to restore the soil.

The contaminated soil as described above is able to complete the washing of the soil by the process coming out through the main washing tank 50 following the supply from the main washing tank.

In the washing for restoring the soil as described above, in the middle of rotating the body of the main washing tank 50 according to the operation of the washing apparatus, it can be seen that the degree of washing through the experiment as follows.

First, we examined the washing effect according to the change of the ratio of the wash water and the soil for washing the pollutants from the soil.

Under such conditions, the ratio of the injection rate of soil from the main bath to the water 15 ㎥ / day, the ratio of the surfactant POE ₅ / POE ₁₄ mixed with the soil is maintained at about 1: 1 (concentration 0.1%), The rotational speed of the feed screw shaft installed in the body was set to 16rpm, the main washing tank 50 rotational speed was fixed to 4rpm, and the ratio of the wash water and soil (volume / weight ratio) was compared to 1, 2, and 3. As a result, it was found that there is no significant difference in the treatment efficiency within the ratio range of the wash water and soil as about 80%.

Therefore, it was determined that it is desirable to set the washing water / soil ratio to 1 for economical operation.

In addition, the soil flow in the steady state based on the result data through the calculation and substantive experiment in order to determine the cleaning efficiency by the change in the rotation speed of the washing apparatus affecting the residence time and the washing strength of the soil through the washing apparatus of the present invention The rotation rate of the main washing tank (50) and pre-washing tank (30) was corrected to be made.

The conditions were 15 m3 / day of soil injection rate from the pre-wash tank 30, and the surfactant mixed with the soil was POE ₅ / POE ₁₄ ratio 1: 1 (concentration 0.1%), washing water / soil ratio of 1 Washing experiment was performed while changing the rotational speed to 16, 18, 20rpm (at this time the rotational speed of the main washing tank 50 for the constant soil flow is 4, 5, 6rpm) in the operating conditions.

In view of the result, the washing efficiency of the washing machine was not significantly different with respect to the change of the rotational speed of the washing machine, but the washing efficiency tended to decrease slightly with the increase of the rotational speed (rpm). This can be interpreted as the result of shortening the washing period due to shortening of the soil residence time in the washing process, although the strength of mutual agitation between the soil and the washing water increases slightly as the rotational speed increases.

Therefore, in this operating condition, it was judged that it is desirable to operate the rotational force of the washing apparatus in the range of 16-18 rpm for proper washing operation.

In addition, through the washing apparatus of the present invention, the soil injection rate of 15 ㎥ / day, which is the design target dimension for the field diesel soil washing experiment, and the surfactant mixed with the soil ratio of POE ₅ / POE ₁₄ 1: 1 ( Concentration of 0.1%), and the operating speed of washing water / soil ratio of 1 and pre-cleaning tank 30 and main washing tank 50 at 18rpm and 5rpm. It showed a relatively high processing efficiency.

As described above, the present invention allows the continuous supply of the soil through the pre-wash bath of the washing apparatus and the simultaneous delivery of the surfactant and the washing, and the secondary soil to the soil washed primarily with the washing water supplied to the main wash tank. If the washing water can be separated from the soil by washing with water, the interface force of soil pollution is reduced to the maximum, so that the lottery can be restored to the soil in its original state. The treatment capacity of the soil can be improved, and the washing device can be mounted on a vehicle, thereby improving the workability due to the transport.

Claims (6)

A mounting table 10 having one side of the bottom coupled to the hinge member 2 rotatably on a base 1 designed to be seated from the ground; Height adjusting means (20) connected to the upper side of the base (1) and the bottom of the mounting table (10) for adjusting the height of one side of the mounting table (10); One side is fixedly installed on the plurality of support (11) provided from the mounting table 10, the pre-washing tank 30 for receiving the soil contaminated from the outside to wash first; A first driving part 40 connected to the pre-wash tub 30 by a chain on the mounting table 10; A main washing tank (50) rotatably installed on the mounting table (10) to receive a portion of the pre-cleaning tank (30) for washing the contaminated soil secondarily; A roller member (60) installed on the mounting table (10) to support the main washing tank (50); A second driving part 70 connected to the main washing tub 50 by a chain on the mounting table 10; The soil washing apparatus, which is installed on the mounting table (10) and is composed of pumping means (80) for supplying the washing water to the washing water spray nozzle (81) inside the main washing tank (50). According to claim 1, On the mounting table (10) is provided with an outlet (3) for receiving the soil washed from the main washing tank (50) and draining the soil to the outside and a drain (4) for receiving and draining the washing water separated from the soil Soil washing apparatus characterized in. The soil washing apparatus according to claim 1, wherein the height adjusting means is a screw jack. The soil washing apparatus according to claim 1, wherein the height adjusting means is a hydraulic jack. According to claim 1, the pre-wash tank 30 is a cylindrical body 31 is provided with an inlet port (31a) for receiving the soil on one side and the discharge port (31b) for discharging the soil, A transfer screw shaft 32 which is installed to support both ends in the body 31 so as to be rotatable, and transfers the incoming soil in one direction; Soil washing apparatus characterized in that consisting of a sprocket 33 is coupled to one end of the transfer screw shaft 32 for receiving power. According to claim 1, the main washing tank (50) has a cylindrical body 51 of which one side is open, is formed spirally in succession in the longitudinal direction of the inner diameter of the body 51 is a spiral wear portion for transporting the soil in one direction ( 52), And wing pieces 53 for interfering the soil is formed at equal intervals on the circumference between the spiral wear portion 52 formed in the inner diameter of the body and transported, Filter network 54 for filtering the washing water is installed at equal intervals on one side circumference of the body, A guide ring 55 installed at an outer circumference of the body and guided to the roller member 60; Soil washing apparatus, characterized in that consisting of a sprocket (56) coupled to one end of the body for rotating the body from the second drive (70).