KR102230364B1 - Soil cleaning system with cleaning the transfer pipes by air - Google Patents

Abstract

The present invention provides a soil washing system capable of washing a transfer pipe by air. The soil washing system includes: a washing device that washes and sorts contaminated soil; a reaction tank that receives the mixed fluid containing the sorted contaminated soil and process water from the washing device, elutes the pollutants, and aggregates the eluted pollutants to precipitate; a silt filtration tank that receives supernatant water from the reaction tank, filters contaminants using the silt washed by the washing device, and circulates the treated water to the washing device; a dehydrator that receives the contaminants precipitated from the reaction tank and dehydrates them to form a cake; a three-way valve including one or more pairs at a specific location of the transfer pipe of the washing device and having a connection part formed on one side; a circulation pipe part having both ends fastened to the connection part of the three-way valve and communicating with a transfer pipe part on the three-way valve under the control of the three-way valve to form a circulation line; and a circulation induction device including an air injection line connected to the circulation pipe part and an air injection pump for pumping air to the air injection line so that air is circulated to the circulation line at high pressure.

Description

Soil cleaning system with cleaning the transfer pipes by air

The present invention relates to a soil washing system capable of washing deposited transport pipes such as sludge, scale, soil, etc. during operation of a contaminated soil washing apparatus using air.

Recently, the importance of the soil environment is rising due to the increasing severity of soil and groundwater pollution due to wastes and hazardous chemicals generated by population growth and industrial development around the world.

Unlike water or air pollution, such soil pollution has characteristics that are not easily revealed, and once it is contaminated, it has the potential to cause secondary pollution to the surrounding environment, such as adversely affecting the water quality of surface water and groundwater. It needs to be cleaned up quickly.

Methods for purifying such contaminated soil include physicochemical methods such as soil washing, incineration, solidification, stabilization, and solvent extraction, and biological methods such as soil cultivation, composting, bioventing, and plant restoration. It can be distinguished, and among these various methods, it is the soil washing method that is relatively easy and can quickly purify contaminated soil.

This method of cleaning contaminated soil is a technique that reduces the surface tension of harmful organic pollutants bound to soil particles by using an appropriate cleaning agent or converts heavy metals into liquid and separates them from soil particles to treat a wide range of organic and inorganic pollutants. While it can be removed, it has the advantage that it can be applied regardless of the kind of contaminants.

Such contaminated soil cleaning methods are divided into on-site treatment (In-situ) and off-site treatment (Ex-situ), and on-site treatment is a washing solution injection well, washing solution discharge well, and washing runoff without excavating the contaminated soil. It is a method of directly washing contaminated soil by circulating washing water within the contaminated soil to be treated by installing treatment facilities, pumps and instrumentation facilities, and volatile material treatment facilities on contaminated sites. Because there is a disadvantage in that there is no mobility, the off-site treatment method is mainly applied to the contaminated soil cleaning method, and the off-site treatment method identifies the distribution of contaminants in the soil and the physical/chemical characteristics of the soil to be treated. After excavating the soil, it is a method of washing the excavated contaminated soil using an appropriate cleaning solution.

There are various known technologies in the case of devices used in such a method of cleaning contaminated soil, but the problem is that sludge and scale are deposited in the transfer pipe during the process of cleaning the contaminated soil and transferring the cleaned contaminated soil in a post process. In the past, after separating the clogged pipe, a washing device was inserted to discharge the deposited sludge, scale, and soil to the outside, so that washing was performed. There was a problem of secondary pollution caused by deposited sludge, scale, and soil discharged into the furnace.

On the other hand, as an example of the prior art for the cleaning of such a clogged pipe, Korean Patent Registration No. 18035 discloses a deep well cleaning apparatus using a brush. Here, a connection rod having a hollow inside and supplied with washing water therein; A fixing means mounted on the circumference of the connecting rod and having a free end supported by the inner wall of the core to fix the connecting rod in a proper position; A hollow rotary shaft connected to a lower portion of the connecting rod in fluid communication; A washing water injection port coupled to the circumference of the rotation shaft and spraying the washing water supplied through the connection rod and the rotation shaft; A brush-type cleaning tool installed at the periphery of the rotation shaft and rotating together by rotation of the rotation shaft to clean the inner wall of the heart well; It is installed on the circumference of the connecting rod and includes a suction means for discharging the slime in the deep well to the ground through negative pressure by air, and the suction means is hollow inside and at least one flows into the circumference. A suction tank equipped with a ball, a check valve that opens the inlet hole of the suction tank in only one direction, a slime discharge pipe connected to communicate with the inside of the suction tank, one side connected to the outside and the other side after passing through the suction tank. Groundwater depth using a brush, characterized in that it includes a suction tube inserted into the slime discharge pipe to allow the slime inside the deep well to be discharged to the outside along the slime discharge pipe after passing through the inlet hole through the negative pressure by the air. A cleaning device is disclosed.

However, when this deep cleaning device is applied to the cleaning of the transport pipe of the soil washing equipment, the problem of secondary pollution caused by deposited sludge, scale, soil, etc. discharged to the outside still exists.

Korean Patent Registration No. 18035

The present invention was conceived to solve the above problems, and is installed in the transfer pipe to remove sludge and scale in the transfer pipe during operation of the contaminated soil washing device to enable easy operation. It is intended to provide a system that can control secondary pollution by preventing soil leakage.

As a means for solving the above-described problems, the soil washing system (hereinafter referred to as "system of the present invention") capable of washing transport pipes by air of the present invention is a washing apparatus for washing and sorting contaminated soil, from the washing apparatus. A reaction tank that receives the mixed fluid containing the classified contaminated soil and process water to elute contaminants and agglomerates and precipitates the eluted contaminants, and contaminates using silt washed from the washing apparatus by receiving supernatant water from the reaction tank. In a soil washing system comprising a four filtration tank for circulating treated water by filtering a substance and a dehydrator for receiving contaminants precipitated from the reaction tank and dehydrating to form a cake, A three-way valve consisting of one or more pairs and having a connection portion formed on one side thereof; A circulation pipe portion having both ends fastened to the connection portion of the three-way valve and communicating with a transfer pipe portion between the three-way valves to form a circulation line under the control of the three-way valve; And a circulation induction device including an air injection line connected to the circulation pipe to circulate air at high pressure in the circulation line and an air injection pump for pumping air to the air injection line.

As an example, a fastening socket to be fastened to the connection part is configured at both ends of the circulation pipe part, and the air injection line is connected to the fastening socket.

As an example, the three-way valve is characterized in that three or more locations are formed in the transfer pipe, so that both ends of the circulation pipe part are selectively mounted on the corresponding three-way valve in a portion of the transfer pipe that needs cleaning.

As an example, the filter tank has a housing in which a treated water discharge line is formed on one side, and the mass is partitioned inside the housing to form a filter material layer, and supernatant water is introduced and filtration is performed by the filter material layer. It characterized in that it comprises a filtration chamber for discharging the water to the housing through an outlet communicating with the interior of the housing.

As an example, the outlet portion includes a flow path formed on a lower surface of the filtration chamber so as to communicate with the housing, a nonwoven fabric layer formed in the flow path and having a plurality of gaps for controlling the flow of mass, and a plurality of It characterized in that it comprises a conduit in which the perforation is formed.

As an example, an outer conduit in which a plurality of perforations is formed is further configured to surround the conduit while forming a clearance with the conduit.

As described above, in the soil washing system, the system of the present invention is mounted on the transport pipe to remove sludge, scale, etc. in the transport pipe during operation of the contaminated soil washing device to enable easy operation. There is an advantage in that secondary pollution can be controlled by preventing the outflow of contaminated soil.

In addition, the system of the present invention allows the physical treatment process of washing and separating the contaminated soil by particle size and the chemical treatment process for fine soil that is not easy to clean by washing, while filtering the colloidal fine clay from the process water. It has the advantage of reducing process load and controlling re-contamination by heavy metals by reusing it after passing through.

1 is a block diagram showing the system of the present invention,
2 is a schematic diagram showing a transfer pipe washing apparatus as one configuration of the present invention,
3 is an operational state diagram of the transfer pipe washing apparatus as one configuration of the present invention,
4 is an operating state diagram of the decompression tank shown in FIG. 3,
5 is an operational state diagram showing another embodiment of the transfer pipe washing apparatus as one configuration of the present invention,
6 is a schematic diagram showing a yarn filtration tank as one configuration of the present invention,
7 is a partial view showing an embodiment of a thread filtration tank.

Hereinafter, on the basis of the accompanying drawings the configuration and operation of the present invention will be described in more detail. In describing the present invention, terms or words used in the present specification and claims are the present invention based on the principle that the inventor can appropriately define the concept of terms in order to describe his or her invention in the best way. It must be interpreted as a meaning and concept consistent with the technical idea of

The system 100 of the present invention receives a cleaning device 120 for washing and sorting contaminated soil as shown in FIG. 1, and a mixed fluid including the contaminated soil and process water classified from the cleaning device 120. The reaction tank 130 that elutes contaminants and aggregates and precipitates the eluted contaminants, and receives supernatant water from the reaction tank 130 and filters the contaminants using the washed mass from the washing device 120 to wash the contaminants. In the soil washing system comprising a filter tank 140 for circulating treated water to the device 120, and a dehydrator 150 for receiving and dehydrating contaminants precipitated from the reaction tank 130 to form a cake, the cleaning device ( 120) a three-way valve (2) consisting of one or more pairs at a specific location of the transfer pipe (b) and having a connection part (21) formed on one side thereof; Both ends are fastened to the connection part 21 of the three-way valve 2, and the circulation line (c) communicates with the transfer pipe (b) between the three-way valves (2) under the control of the three-way valve (2). ) Forming a circulation pipe portion (3); Including an air injection line 41 connected to the circulation pipe 3 and an air injection pump 42 for pumping air to the air injection line 41 so that high-pressure air is circulated in the circulation line (c). It characterized in that it includes; circulation induction device (4).

First, in the system 100 of the present invention, contaminated soil is introduced into the cleaning apparatus 120 through the input hopper 110.

After washing the contaminated soil, the cleaning device 120 filters the large-sized soil and the mixed fluid of the relatively small soil and process water (washing water) through the transfer pipe (b) described below, the reaction tank 130, which is a subsequent process. ), such a washing device 120 has various known devices, and thus a detailed description thereof will be omitted.

Although not shown in the drawing, the cleaning device 120 may include a first cleaning device, a second cleaning device, and a third cleaning device.

The first washing device first selects relatively large particles from 50 mm to 5.0 mm in particle diameter among the contaminated soil, and the mixed fluid of the contaminated soil and process water from which the relatively large particles passed through the first washing device are selected is passed through the mixing storage tank and Particles with a particle diameter of 5.0mm to 2.0mm are sorted in a washing device, and finally, particles with a particle diameter of 2.0mm to 0.5mm are sorted in a third washing device. Particles having a particle diameter of 2.0 mm to 0.5 mm filtered by the third washing apparatus are used as a filter medium in the yarn filtration tank 140 as the above-mentioned silt. The washed silt is economical as it is used as a filter material, and the soil environment conservation law does not violate by using the silt produced in the process of treating contaminated soil generated at each contaminated site as a filter material.

In addition, in the system 100 of the present invention, as shown in Figs. 1 and 2, the transfer pipe cleaning device 1 is configured. The transfer pipe cleaning device 1 is composed of one or more pairs at a specific location of the transfer pipe (b) for transferring the mixed fluid including the contaminated soil and process water classified by the cleaning device 120 to the reaction tank 130. A three-way valve 2 having a connection part 21 formed on one side thereof; Both ends are fastened to the connection part 21 of the three-way valve 2, and the circulation line (c) communicates with the transfer pipe (b) between the three-way valves (2) under the control of the three-way valve (2). ) Forming a circulation pipe portion (3); Including an air injection line 41 connected to the circulation pipe 3 and an air injection pump 42 for pumping air to the air injection line 41 so that high-pressure air is circulated in the circulation line (c). It characterized in that it includes; circulation induction device (4).

In the case of the first washing device and the second washing device in the washing device 120, the conveying pipe (b) is a second washing device and a third washing device for the mixed fluid including contaminated soil and process water classified by the washing device, respectively. Corresponds to the configuration delivered to the device.

In the interior of the transfer pipe (b) through which the mixed fluid of soil and washing water flows, sludge and scale are deposited, which makes the flow of the fluid difficult or clogged. ) Is to be cleaned without discharging the sludge and scale that is deposited to the outside.

The three-way valve (2) is configured in the transfer pipe (b) to induce a three-way flow of the fluid, and during washing, while only the flow (Q1) in the transfer pipe (b) is guided. This is to ensure that only the flow (Q2) in line (c) is induced. In the case of the three-way valve 2 as well, since various known technologies such as a ball type exist, a detailed structure and operation mechanism thereof will be omitted.

However, as one configuration of the present invention, the three-way valve 2 is configured with a connection part 21 so that the circulation pipe part 3 is detached from the known technology. The connection part 21 is a configuration that is fastened with the fastening sockets 31 configured at both ends of the circulation pipe part 3 as described below, and may be fastened by rotational coupling of a screw thread and a screw bone as shown in the drawings.

This three-way valve 2 is already configured in the transfer pipe (b), and FIG. 2 shows an example in which two are configured on the inlet side and the outlet side of the fluid, but the present invention is not limited thereto, as shown in FIG. The three-way valve (2) is configured in three or more locations in the transfer pipe (b), so that both ends of the circulation pipe part (3) are selectively connected to the part of the transfer pipe (b) that needs cleaning. In this case, the air injection line 41 is a fastening socket 31 that is fastened to the connection part 21 of the three-way valve 2 located in the inflow direction of the transfer pipe b among the three-way valves. It makes sense to be connected to.

That is, the circulation pipe (3) is connected only to the transfer pipe (b) where foreign substances (s) such as sludge are deposited to form a circulation line (c), so that the fluid flow by high pressure air is more smoothly achieved. will be. Here, the detection of the part of the transfer pipe (b) in which the foreign matter (s) is deposited can be made by empirical rules such as sound, and monitoring can be made possible by installing a pressure sensor.

As mentioned above, both ends of the circulation pipe part 3 are fastened to the connection part 21 of each three-way valve 2, and between the three-way valves 2 by the control of the three-way valve 2 It communicates with the transfer pipe (b) to form a circulation line (c).

Fastening of the connection part 21 between the circulation pipe part 3 and each of the three-way valves 2 is a fastening socket 31 that is fastened to the connection part 21 at both ends of the circulation pipe part 3 as shown in FIG. 2 and the like. In this configuration, the circulation pipe part 3 and each of the three-way valves 2 are connected by the fastening of the fastening socket 31 and the connection part 21, and the circulation line ( The circulation pipe portion 3 and each three-way valve 2 communicate with each other so that c) is formed.

Here, as shown in the drawing, the fastening socket 31 is formed with a thread facing the inner circumference of the connection part 21 at the end and is mutually fastened by rotation. Although not shown in the drawing, of course, the fastening socket 31 must be configured to enable rotational interlocking at both ends of the circulation pipe part 3, and the fastening socket 31 or the connecting part 21 has water-tightness inherent in various structures. This should be secured.

In addition, the air injection line 41 is connected to the fastening socket 31, and a connection socket 43 is formed at the end of the air injection line 41, and is fastened to the fastening socket 31, so that the air injection line 41 ) And the fastening socket 31 is configured to communicate.

Here, the fastening of the connection socket 43 and the fastening socket 31 may be configured in the same structure as the fastening of the fastening socket 31 and the connection part 21, and as shown in the drawings in the fastening socket 31 by various structures. There is no bar, but the configuration to be fastened with the connection socket 43 ensures watertightness when the connection socket 43 is not fastened, and the connection socket 43 and the fastening socket 31 communicate with each other when the connection socket 43 is fastened. The air injected through the air injection line 41 flows into the transfer pipe (b) through the fastening socket (31), so that cleaning by high pressure is performed in the transfer pipe (b).

Meanwhile, as air is injected into the transfer pipe (b), a fluid flow is formed in the circulation line (c). When sludge, scale, and soil flow through the circulation line (c), the fluid pressure due to air gradually decreases. In the circulation pipe part 3, the circulation pipe part 3 may be clogged by deposition of sludge, scale, soil, etc. In order to control such clogging, a decompression tank 5 is configured in the circulation pipe part 3.

The decompression tank 5 allows the fluid flowing through the one side circulation pipe part 3-1 to be temporarily stored in the decompression tank 5 and then flows to the other side circulation pipe part 3-2. The foreign matter (S1) flowing through the sludge, scale, soil, etc. is in a pressurized state and the cohesive force between the particles is increased. When this foreign material (S1) is discharged to the decompression tank 5, the speed of the particles increases as the pressure is reduced. As shown in, the foreign matter (S2) expands and the cohesive force between the particles is reduced, and the foreign matter (S-2) in this state is temporarily stored in the decompression tank (5), and the other side circulation pipe (3-2) is ), which decreases the cohesive force between particles, thereby controlling clogging due to deposition of foreign substances in the circulation pipe part (3). That is, the circulation line (c) is to facilitate fluid circulation.

In addition, in order to facilitate fluid circulation in the circulation line (c), the circulation induction device 4 includes a vacuum pump 44, and a vacuum line 43 connected to the vacuum pump 44 is provided in the decompression tank ( It is connected to communicate with 5) to remove the air collected in the decompression tank 5 by the control of the vacuum pump 44. That is, the air is removed from the decompression tank 5 in the circulation line c, so that a smooth fluid flow is achieved in the circulation line c. The control of the vacuum pump 44 may be performed periodically or by sensing by a pressure sensor or the like.

In addition, in the present invention, in the decompression tank 5, solids such as soil, sludge, scale, etc. are reduced by decompression to reduce cohesive power, and pulverization is performed so that smooth circulation in the circulation line (c) is performed, thereby further enhancing the cleaning efficiency. An example to be done is presented in FIG. 5.

In this embodiment, a plurality of grinding blades 62 are formed in the decompression tank 5 so that a grinding section 6 for grinding solids by rotation is configured, the grinding section 6 being the pressure reducing tank 5 ), and a crushing blade 62 protruding from the rotation shaft 61 and having an inclined gradient formed in a predetermined direction.

In this way, the pulverization hole 6 is configured so that the fluid discharged from the circulation pipe part 3-1 strikes the pulverizing blade 62 so that the pulverization hole 6 can be rotated in the decompression tank 5 This is to cause the pulverization of the solid in the decompression tank 5 by the rotation of the pulverizer 6.

In order to further increase the pulverization efficiency, high-pressure air is discharged in addition to the fluid flowing in the circulation pipe part (3-1) on one side, thereby strengthening the blow of the crushing blade 62, thereby further multiplying the rotational force of the pulverizing port 6. More examples are provided.

To this end, in the decompression tank 5, a second fastening socket 32 formed at one end of one circulation pipe part 3-1 on both sides and a second fastening socket formed at one end of the other circulation pipe part 3-2 ( 32) is configured to be fastened to the second connection portion 51, respectively, so that one side circulation pipe part (3-1) and the other side circulation pipe part (3-2) are fastened to the decompression tank 5, but one side circulation pipe part (3) The air injection line 41 is connected to the second fastening socket 32 of -1) so that the fluid to which the propulsive force is added by air strikes the grinding blade 62 of the grinding port 6.

When the operation mechanism of this embodiment is described with reference to the drawings, when cleaning the transfer pipe (b), first, each component such as the circulation pipe part 3 is assembled. The air injection line 41 is connected to the other side circulation pipe part 3-2. Assemble (①) to the fastening socket (31). That is, air is first injected into the transfer pipe (c) to be cleaned at high pressure to ensure circulation.

Then, by assembling (②) the air injection line 41 to the second fastening socket 32 of the circulation pipe part 3-1 on one side, the high-pressure air adds a strong rotational force of the pulverizer 6 as mentioned above. It is to increase the grinding efficiency of the solid content.

After the solid content is pulverized, the air injection line 41 is assembled (③) to the fastening socket 31 of the other circulation pipe part 3-2 to ensure smooth fluid circulation in the circulation line (c).

Such an operation mechanism can be made to be operated by sequential assembly of the air injection line 41 as seen above, and two air injection lines 41 are configured in one air injection pump 42, respectively, to the other side. Each air injection line under the control of the air injection pump 42 in the state of being assembled in the fastening socket 31 of the circulation pipe part 3-2 and the second fastening socket 32 of one circulation pipe part 3-1. It can be implemented through sequential injection of air in (41).

On the other hand, the reaction tank 130 receives the mixed fluid including the contaminated soil and process water classified from the washing device 120 to elute the contaminants and aggregate and precipitate the eluted contaminants.

The contaminated soil classified here may be, for example, soil with a particle diameter of less than 0.5mm. In the case of fine soil having a small particle size, heavy metals are mixed in various forms with a large cross-sectional area.The reaction tank 130 chemically elutes contaminants such as heavy metals from the mixed fluid using a chemical, and the eluted contaminants are easily removed. In order to separate it properly, it agglomerates using a coagulant, etc., and precipitates and separates the agglomerated contaminants while floating and separating foreign substances with a small specific gravity.

To this end, the reaction tank 130 is not shown in the drawing, but an elution tank that elutes contaminants from the mixed fluid, a coagulation tank that aggregates the eluted contaminants by receiving the mixed fluid from which the contaminants are eluted, and the contaminants It is preferable to include a sedimentation tank 3) in which precipitation and suspension reactions are carried out by receiving the agglomerated mixed fluid so that each reaction is performed separately to control interference between reactions.

In the reaction tank 130, the elution reaction, aggregation reaction, etc. can be expressed by using various known chemicals, and thus detailed descriptions thereof will be omitted.

The four filtration tank 140 receives supernatant water from the reaction tank 130 and filters contaminants using the washed mass from the washing device 120 to transfer the treated water to the washing device 120 (mixed storage tank). Corresponds to a circulating configuration.

After chemical treatment in the reaction tank 120, colloidal fine clay, which is difficult to remove due to precipitation, is removed by passing through the filter tank 140 and reused as process water (washing water), thereby lowering the process load due to colloidal fine clay. It is to control the re-contamination of colloidal fine clay to efficiently perform soil washing.

As shown in FIG. 6, the filter tank 140 includes a housing 141 in which a treated water discharge line 141-1 is formed on one side, and the mass is partitioned inside the housing 141 to fill the mass, and supernatant water flows in. And a filtration chamber 142 for discharging the treated water to the housing 141 through an outlet 145 communicating with the interior of the housing 141 to be filtered.

The housing 141 includes a treated water discharge line 141-1, a washing line 141-2, and a drain line 141-3 for circulating treated water to the mixing storage tank as shown in FIG. 6, and the housing A filtration chamber 142 is formed inside the 141 so that the treated water filtered through the filtration chamber 142 is discharged to the treated water discharge line 141-1.

The filter chamber 142 is filled with the above-mentioned mass to form the filter material layer 143, and the supernatant water flows into the filter material layer 143 to perform filtration.

It is reasonable to prevent scouring and piping of the filter material layer 143 while preventing the outflow of the filter material by forming a cover plate 144 forming a plurality of through holes on the top of the filter material layer 143.

As shown in the drawing, it is reasonable that the filtration chamber 142 is configured in a shape whose diameter is narrowed downward so that the filtered treated water is easily discharged to the outlet 145.

The outlet 145 includes a flow path 145-1 formed on the lower surface of the filtration chamber 142 to communicate with the housing 141, and a plurality of flow paths 145-1 formed in the flow path 145-1 to control the flow of mass. It characterized in that it comprises a non-woven fabric layer (145-2) in which the gap is formed, and a conduit (145-3) in which a plurality of perforations are formed under the non-woven fabric layer (145-2).

The nonwoven fabric layer 145-2 is formed to control the flow of mass through the flow path 145-1, and the treated water passes through the pores of the nonwoven fabric layer 145-2, and the lower pipe 145 It is to be collected with -3).

As shown in the figure, the conduit 145-3 has a shape that surrounds the flow path 145-1 while communicating with the flow path 145-1, and the treated water passing through the nonwoven fabric layer 145-2 is the conduit 145- 3) is temporarily collected (reserved) to flow out into the housing 141 through the perforation formed in the pipe (145-3).

The reason for the formation of the pipe 145-3 is that the treated water is stored in the pipe 145-3 so that the treated water uniformly penetrates into the nonwoven fabric layer 145-2, so that channeling in the filter media layer 143 is performed. This is to control what is formed. That is, the channeling is controlled to be formed in the filter material layer 143 by uniform penetration of the treated water into the entire flow path 145-1.

In addition, in the present invention, as shown in FIG. 7, an outer pipe passage 145-4 formed with a plurality of perforations formed therein while forming a clearance with the pipe passage 145-3 outside the pipe passage 145-3 is shown. The structure of the outer pipe line (145-4) increases the storage time of the treated water in the pipe line (145-3) and the outer pipe line (145-4), so that the treated water is uniform with the nonwoven fabric layer (145-2). It is to make one penetration more smooth.

Preferably, it is reasonable that the perforation of the pipe 145-3 and the perforation of the outer pipe 145-4 are formed at positions that do not face each other.

Meanwhile, as shown in FIG. 1, the contaminants precipitated in the reaction tank 130 are transferred to the dehydrator 150 to be caked, and as shown in the figure, in the case of suspended substances discharged by washing in the filter tank 140 Also, it may be transferred to the dehydrator 150 to be a cake.

It will be appreciated by those skilled in the art through the above description that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the claims.

100: system 1 of the present invention: transfer pipe circulation device
2: 3-way valve 3: circulation pipe part
4: circulation induction device 5: decompression tank
6: crushing hole

Claims (6)

A washing device that cleans and sorts contaminated soil, a reaction tank that receives the mixed fluid including the contaminated soil and process water classified from the cleaning device to elute the contaminants and aggregates and precipitates the eluted contaminants, and the supernatant water from the reaction tank. Soil including a four filtration tank for circulating treated water to the cleaning device by filtering contaminants using silt that has been received and washed from the cleaning device, and a dehydrator for dehydrating and dehydrating the contaminants precipitated from the reaction tank In the cleaning system,
A three-way valve consisting of one or more pairs at a specific location of the transfer pipe among the washing apparatus and having a connection part formed on one side thereof;
A circulation pipe portion having both ends fastened to the connection portion of the three-way valve and communicating with a transfer pipe portion between the three-way valves to form a circulation line under the control of the three-way valve; And
A circulation induction device including an air injection line connected to the circulation pipe to circulate air at high pressure in the circulation line and an air injection pump for pumping air to the air injection line;
The yarn filtration tank,
A housing in which a treated water discharge line is formed on one side, and a filter material layer is formed by filling the mass by being partitioned inside the housing, and supernatant water is introduced to be filtered by the filter material layer, and the treated water is communicated with the interior of the housing. It includes a filtration chamber discharged to the housing through the outlet,
The outlet portion,
A flow path formed on the lower surface of the filtration chamber to communicate with the housing, a nonwoven fabric layer formed in the flow path and having a plurality of gaps to control the outflow of mass, and a flow path surrounding the flow path while communicating with the flow path at a lower portion of the nonwoven fabric layer. In a shape, the treated water passing through the nonwoven fabric layer is stored and a plurality of perforations are formed to allow the stored treated water to flow out, and a shape to surround the pipe while forming a clearance with the pipe at the outer side of the pipe. A soil washing system capable of cleaning transport pipes by air, characterized in that it includes an outer pipe path in which a plurality of perforated holes are formed at positions not facing each other.
The method of claim 1,
A soil washing system capable of washing transfer pipes by air, characterized in that a fastening socket fastened to the connection part is configured at both ends of the circulation pipe part, and the air injection line is connected to the fastening socket.
The method of claim 2,
The three-way valve is configured in three or more locations in the transfer pipe, so that both ends of the circulation pipe part are selectively mounted on the corresponding three-way valve in a portion of the transfer pipe that needs cleaning. Soil washing system. delete delete delete

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