KR100779992B1 - Weir type settling tank for soil washing plant and non discharge type soil washing plant using the same - Google Patents

Abstract

The present invention relates to a sedimentation basin for sedimentation of the soil contained in the washing water in the treatment of the washing water discharged from the soil washing apparatus and to a soil washing facility through the sedimentation area. The sedimentary soils can be classified by particle size without a separate device, thereby improving the operating efficiency of the entire washing water treatment plant and simplifying the facility scale.

Through the present invention, it is possible to configure a non-discharge type soil washing facility that is capable of purifying the soil washer effluent through a small number of facilities to recycle the purified effluent to the wash water, thereby making the most difficult point of conventional soil washing facility construction. It is possible to fundamentally solve the problems of water pollution caused by water source, site, and discharged water.

Soil washing, settlement, moon flow, scun

Description

Wet type settling tank for soil washing plant and non discharge type soil washing plant using the same}

The present invention relates to a sedimentation basin for sedimentation of the soil contained in the washing water in the treatment of the washing water discharged from the soil washing apparatus and to a soil washing facility through the sedimentation area. The sedimentary soils can be classified by particle size without a separate device, thereby improving the operating efficiency of the entire washing water treatment plant and simplifying the facility scale.

Purification of soil contaminated by various contaminants such as organic matter, inorganic salts and heavy metals can be divided into on-site treatment and off-site treatment depending on whether or not the polluted soil is transported. The type of facilities that induce chemical reactions, such as reaction walls, may be used. The off-site treatment may be a method of purifying contaminated soil through a treatment facility such as a soil washing facility. .

Soil washing, which is a representative method of such off-site treatment, refers to a treatment for washing soil through washing water taken from an external water source as its prior meaning. Is carried out through the soil washing plant.

As can be seen through Figure 1, the contaminated soil collected from the contaminated area is put into the soil washing apparatus 20 with the washing water taken from the water source and washed, the discharge water discharged during the washing process includes a significant amount of soil As such, there are various stages of particle size soil washing apparatus 20 in the soil washing facility, including various solid-liquid separation devices for separating the soil contained in the discharged water and purifying the discharged water.

Here, the soil washing apparatus 20 is a device that separates the washed soil particles and the washing water by putting the contaminated soil with the washing water, washing through pressure, vibration, rotation and stirring, and passing through a screen of reticular In this regard, since the washed soil is basically separated from the washing water by the screen, only soil having a predetermined particle size or more is collected, and soil having a particle size smaller than that is discharged together with the washing water.

Therefore, a method of constructing a plurality of soil washing apparatuses 20 step by step or forming a screen in the soil washing apparatus 20 in multiple stages is applied, and a sorting apparatus for classifying soils of various particle sizes constituting soil. Alternatively, the dehydration device is similar to the above-described soil washing device 20, so that in the actual soil washing process, the sorting device, the soil washing device 20 and the dewatering device are mixed.

As shown in FIG. 1, the soil-washing process of the soil contaminated through the soil washing apparatus 20 is washed with coarse soil through the first soil washing apparatus 20 and then discharged. The effluent proceeds in a stepwise manner in which the waste water is introduced into the soil washing apparatus 20 for washing the neutral soil, and as can be seen from the drawing, the soil washing apparatus for performing the washing process by particle diameter ( 20) and other devices are carried out with a combination of forward conveyance and reprocessing, and between them, a solid-liquid separator such as hydrocyclone, sedimentation, and screw-decanter is installed. To clean the earth and sand by the particle size range, and the final discharged water discharged from the final settlement in the form of supernatant may be purged with a purification device 30 that performs physical or biochemical treatment, such as a coagulation sedimentation tank and a reaction tank. And it is discharged after the purification treatment.

Meanwhile, in the example of the soil washing facility shown in the accompanying drawings, the earth and sand washed by particle diameter are divided into granules, neutral, fine grains, and fine grains. It does not refer to a specific particle size range but represents a relative particle size. The particle size step may be increased or decreased depending on the site conditions or the particle size distribution of the soil to be washed.

Such conventional soil washing equipment is generally applied to a single basin of the type of tank, so as shown in Figure 1, separate settling and complex solid-liquid separation device for each particle diameter to the washing process of the particle size, according to the large-scale There was a problem that the facility and facility site takes.

Therefore, large-scale soil washing facilities have to be constructed in areas where the source of the wash water is easily secured and the site can be easily secured. Therefore, there is a problem that excessive transportation costs are required when treating contaminated soil at a long distance. In the case of miniaturization and construction in the vicinity of the contaminated soil, not only the soil washing performance but also the purification performance of the discharged washing water will deteriorate, so the purified washing water cannot be reused. Due to the washing water is a serious problem, such as causing water pollution of the nearby river.

The present invention was devised in view of the above-described problems, and the inflow chamber 210 and the outflow chamber 220 in which the inflow pipe 100 through which the washing water to be treated and the outflow pipe 200 through which the supernatant water is discharged are respectively installed are walled. It is connected through the flow unit 300, the inlet chamber 210 in the downstream of the inlet pipe 100 and the upstream of the outlet pipe 200 in the outlet chamber 220, respectively, the inlet compartment partition wall 212 and the outlet compartment partition wall ( 222 is installed, the outlet 209 is formed at the bottom of the inlet chamber 210 and the outlet chamber 220, the washing water introduced through the inlet pipe 100 overflows the overflow portion 300, the outlet chamber 220 The supernatant introduced into the outlet and formed in the outlet chamber 220 is discharged through the outlet pipe 200, and the sediment settled in the inlet chamber 210 and the outlet chamber 220 is discharged through the outlet 209. As a monthly type sedimentation basin for the soil cleaning equipment, a plurality of blades 400 crossing the settler is spaced on the upper part of the settlement Coupled to the closed chain 410 is installed, the chain 410 is connected to the motor 490, the blade 400 moves as the motor 490 rotates, the scum discharge pipe downstream of the chain 410 The scum collection tank 430 to which the 439 is connected is installed, and the scum transferred by the blade 400 is collected and discharged through the scum collection tank 430 and the scum discharge pipe 439, and the blade 400 Chain 410 is connected to the hinge 401, the upstream side of the scum collecting tank 430 is a overflow type settlement for soil washing facility, characterized in that the protruding guide plate 431 is formed,

In addition, in the soil washing equipment is installed in the settlement, the settlement is connected to the soil washing apparatus 20 and the purification equipment 30, the purification equipment 30 is connected to the washing water supply tank 10, the soil washing apparatus ( The discharged water from 20) flows into the sedimentation basin, the supernatant discharged from the sedimentation basin flows into the purification facility 30, and the purified treatment water passed through the purification facility 30 flows into the washing water supply tank 10 and then again the soil washing device. (20) is a non-discharge soil washing facility, characterized in that it is supplied to the overhang-style settlement.

Through the present invention, it is possible to configure the non-discharge type soil washing facility that can be purified through the small-scale equipment of the soil washer discharge water to recycle the purified waste water to the washing water, thereby the biggest difficulty of conventional soil washing facility construction It is possible to fundamentally solve the problems of water pollution caused by water source, site, and discharged water.

The detailed configuration and operation principle of the present invention will be described with reference to the accompanying drawings.

First, Figure 2 shows the configuration of the soil washing equipment to which the sedimentation of the present invention is applied, and when compared with the conventional soil washing equipment of Figure 1, it can be seen that the solid-liquid separation device including the sedimentation is significantly simplified.

In this way, since the desired waste water purification effect can be obtained through a simplified configuration and process, it is possible to quickly construct near the contaminated soil to be treated, thereby reducing transportation costs, and constructing a washing water supply tank 10 in a soil washing facility. In addition, by re-injecting the supernatant water of the settling pond purified through the purification facility 30 to the washing water supply tank 10, the discharge of the soil washing facility that does not require a separate water source is possible.

The settling zone of the present invention, which is a key component of such an undischarged soil washing plant, is shown in FIG. 3, and a representative cross-sectional view showing its operating state is shown in FIG.

As can be seen through these figures, the settling paper of the present invention is a structure in which the inside is divided by the overflow portion 300, consisting of a water tank separated into the inlet chamber 210 and the outlet chamber 220, respectively, The chamber 210 and the outlet chamber 220 are provided with an inlet pipe 100 through which the washing water to be treated is introduced and an outlet pipe 200 through which the supernatant is discharged.

In addition, an inflow partition wall 212 and an outflow partition partition wall 222 are installed at the downstream side of the inflow pipe 100 and the upstream side of the outflow pipe 200 to prevent the stored water from being disturbed during the inflow and outflow processes. An outlet 209 for discharging the sediment settled in both the inlet chamber 210 and the outlet chamber 220 is installed at the bottom.

In the illustrated embodiment, the inlet chamber 210 and the outlet chamber 220 have a hopper-like structure of the upper and lower straits, and thus weir-shaped walls having their junctions as crests. The flow part 300 is formed.

Thus, as shown in FIG. 2, the treated water introduced through the inflow pipe 100 is temporarily suspended in the inflow chamber 210, and then flows into the outflow chamber 220 by overflowing the overflow part 300. It is discharged through the outlet pipe 200, in which the large particle size sediment is settled in the inlet chamber 210, and the small particle size is sedimented in the outlet chamber 220 to separate the particle size without a separate sorting device and the secondary settlement Separation proceeds naturally.

When the sedimentation proceeds through a plurality of sedimentation sites, as in the conventional soil washing facilities to which the sedimentation is applied, the sedimentation land is connected to a water channel or a transfer pipe. In this process, the treated water is severely disturbed. Not only does it take a lot of time to achieve a steady temperature state, but also the sedimentation efficiency is deteriorated, but in the sedimentation basin of the present invention, the overflow portion in moving the treated water from the inlet chamber 210 to the outlet chamber 220 ( By overflowing 300, the disturbance of the treated water can be minimized, and a still temperature can be easily secured thereafter.

In addition, as can be seen through the accompanying drawings, in the case of the inlet chamber 210 in which the coarse soil is settled, the sedimentation rate is relatively fast, so that even a small volume of water can be treated, compared to the outlet chamber 220. It is possible to configure the inlet chamber 210 of a small dimension, thereby further reducing the size of the settlement of the same treatment capacity.

On the other hand, Figures 5 to 9 shows an embodiment in which a scum removal device is installed on the upper part of the sedimentation basin of the present invention, through which the scum formed on the surface of the sedimentation basin can be effectively removed to ensure the quality of the discharged supernatant water. .

5 and 6, the scum removing device includes a plurality of blades 400 connected to both ends of the pair of chains 410 spaced from each other and installed in a direction crossing the settlement, and these blades. The scum collected by the 400 is composed of a scum collection tank 430 is collected, as shown in Figure 7, the scum formed on the surface of the sink land flows into the scum collection tank 430 by the blade 400 is moved After the operation is discharged to the outside through the scum discharge pipe (439).

The pair of chains 410 to which the blades 400 are connected are coupled to a sprocket 420 connected through a power transmission means such as a motor 490 and a gear to move as the motor 490 rotates. Therefore, the blade 400 also continuously moves the scum while orbiting along the chain 410.

8 and 9 in the configuration of the scum removing device by connecting the blade 400 and the chain 410 with the hinge 401 to allow the blade 400 to rotate freely, the scum collection tank 430 By installing the guide plate 431 protruding upstream, the collection performance of the scum is doubled.

That is, as in the enlarged part of the garden of FIG. 9, the blade 400 approaching the scum collection tank 430 moves in close contact with the guide plate 431 to collect the scum and the scum that flows with the scum as well. It is to be minimized.

1 is a conventional soil washing facility configuration

Figure 2 is a block diagram of the soil washing facility of the present invention

Figure 3 is a perspective view of one embodiment of the settlement of the present invention

Figure 4 is a representative cross-sectional view of one embodiment of the working area of the present invention

Figure 5 is a perspective view of one embodiment of the settling paper of the present invention installed scum removal device

Figure 6 is a partial cutaway perspective view of the main portion of the excavation site of the present invention installed scum removal device

Figure 7 is a representative cross-sectional view of one embodiment of the settling place of the present invention installed scum removal device

8 is an exploded perspective view of the main portion of the scum removing device of the present invention to which the rotational blade is applied

Figure 9 is a representative cross-sectional view of the operation state of the scum removal device of the present invention is applied to the rotating blades

<Code Description of Main Parts of Drawing>

10: washing water supply tank

20: soil washing device

30: purification equipment

100: inlet pipe

200: outflow pipe

209 outlet

210: inflow chamber

212 inflow bulkhead

220: outflow chamber

222: spill compartment bulkhead

300: overflow

400: blade

401 hinge

410: Chain

420: Sprocket

430: collection of scum

431: Induction plate

439: scum discharge pipe

490: motor

Claims (4)

An inflow chamber 210 and an outlet chamber 220 in which the inflow pipe 100 through which the treatment target washing water flows and the outflow pipe 200 through which the supernatant water is discharged are installed are connected through the overflow part 300; An inlet compartment partition wall 212 and an outlet compartment partition wall 222 are installed at a downstream portion of the inlet pipe 100 in the inlet chamber 210 and an upstream portion of the outlet pipe 200 in the outlet chamber 220; A discharge port 209 is formed at the bottom of the inflow chamber 210 and the outflow chamber 220, and the washing water introduced through the inflow pipe 100 flows into the outflow chamber 220 and flows into the outflow chamber 220. The supernatant water formed in the 220 is discharged through the outlet pipe 200, and the sediment settled in the inlet chamber 210 and the outlet chamber 220 is discharged through the outlet 209, the wall for soil washing equipment Ryu sediment. The method of claim 1, wherein a plurality of blades (400) crossing the settlement is coupled to the pair of closing chain 410 spaced apart from the top of the settlement, the chain 410 is connected to the motor 490 to the motor The blade 400 moves as the 490 rotates; The scum collection tank 430 connected to the scum discharge pipe 439 is installed in the downstream portion of the chain 410; The scum conveyed by the blade 400 is collected and discharged through the scum collection tank 430 and the scum discharge pipe 439, the overflow type sedimentation basin for the soil washing equipment. The soil of claim 2, wherein the blade 400 and the chain 410 are connected through a hinge 401, and a protruding guide plate 431 is formed at an upper end of an upstream side of the scum collection tank 430. Overflow sink for cleaning installations. In the soil washing facility is installed in any one of the claims 1 to 3, the settlement is connected to the soil washing apparatus 20 and the purification equipment 30, the purification equipment 30 is the washing water supply tank (10) Connected with, the discharge water from the soil washing apparatus 20 is introduced into the sedimentation basin, the supernatant discharged from the sedimentation basin is introduced into the purification facility 30, the purified water treated through the purification facility 30 is the washing water supply tank (10) After discharged into the soil-free device, characterized in that it is supplied back to the soil washing apparatus 20, the overflow type sedimentation.

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