JP2012007310A - Pollutant capturing equipment and construction method of pollutant capturing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide pollutant capturing equipment capable of being installed by efficiently utilizing land while being capable of lowering the content of pollutants and making wastewater flow to the downstream side.SOLUTION: The pollutant capturing equipment includes two treatment tanks 4U,4D provided with an inflow port 41 for making wastewater containing pollutants flow in, a tank body 42 for lowering the content of the pollutants in the wastewater that has flown in and an outlet port 43 for making the wastewater flow out of the tank body 42. Also, the pollutant capturing equipment has a structure 1 for capturing the pollutants, which is installed in the tank body 42 in order to lower the content of the pollutants contained in the wastewater which has flown in from the inflow port 41. The treatment tanks 4U,4D are provided at an interval in the vertical flow direction of the wastewater, and have an upper connection pipe 49 for connecting the outlet port 43 of the treatment tank 4U to be the upstream side and the inflow port 41 of the treatment tank 4D to be the downstream side.

Description

  The present invention relates to a contaminant capturing facility for reducing the content of contaminants contained in wastewater, and a construction method thereof.

  For example, on the road surface where a car runs, sediment, dust, particulate matter that has been discharged from the car and suspended in the air, and oil such as oil or fuel that has flowed out of the car has accumulated. There may be. Such road surface deposits are mixed with rainwater when it rains and flow into the gutters from the road surface and then flow into the rivers and fields around the roads. It is one of the causes.

Therefore, before rainwater containing such pollutants flows into rivers, etc., it has been proposed to separate the pollutants from rainwater and reduce the content of pollutants to flow rainwater downstream. . Then, as an installation provided with this function, there exists a thing of patent document 1, for example.
The facility described in Patent Document 1 includes a partition floor that vertically divides a treatment tank installed in the ground into an upper chamber and a lower chamber, and blocks rainwater flowing into the upper chamber on the partition floor. There are provided a weir part, an inlet pipe for flowing the dammed rainwater to the lower chamber, and an outlet pipe for flowing the rainwater accumulated in the lower chamber to the upper chamber.

  According to this equipment, when rainwater containing pollutants flows from the upper chamber through the inlet pipe to the lower chamber, the flow rate in the lower chamber is slowed down. For example, particulate matter in the pollutants is sedimented. The oil in the pollutant becomes a floating substance in the lower chamber, and the sediment and the floating substance are captured in the lower chamber. As a result, the rainwater having a reduced content of pollutants can flow to the upper chamber through the outlet pipe provided on the partition floor, and then flow from the treatment tank to the downstream river or the like.

US Pat. No. 5,849,181

According to this facility, as described above, the particulate matter and oil in the pollutant contained in the wastewater become sediment and floating matter and are captured in the lower chamber and included in the wastewater flowing from the treatment tank to the downstream side. It is possible to reduce the content of pollutants.
However, when the processing tank of such equipment is installed in the ground, for example, it is necessary to avoid interference between the processing tank and other structures. For this reason, it becomes difficult to install a big processing tank depending on a place, and the area which can perform the process which reduces the content rate of a contaminant by the said equipment may be limited.

  Therefore, the present invention provides a contaminant capture facility that can be efficiently installed using land, while having the ability to reduce the content of contaminants and allow wastewater to flow downstream. The purpose is to provide the construction direction.

  The present invention includes a tank main body, an inlet for allowing waste water containing contaminants to flow into the tank main body, a treatment tank having an outlet for discharging waste water to the outside of the tank main body, and waste water flowing from the inlet. In order to reduce the content rate of the contaminants contained in the tank body, the plurality of treatment tanks are provided at intervals in the upstream and downstream direction of the wastewater. An apparatus for capturing contaminants, further comprising an upper connecting pipe connecting the outlet of the processing tank on the upstream side and the inlet of the processing tank on the downstream side, and the structure for capturing contaminants Each of the treatment tanks is divided into upper and lower compartments into which wastewater flows and a lower compartment that captures contaminants contained in the wastewater, and a first region that is a part of the compartment floor. The wastewater that has flowed into the dam is blocked and the wastewater is A dam portion that allows overflow to the second region outside the first region, an inlet portion for flowing waste water blocked by the dam portion to the lower chamber, and waste water in the lower chamber for the second And an outlet for flowing into the region.

  In order to configure the contaminant capture facility of the present invention, the upstream outlet of the processing tank and the downstream inlet of the processing tank may be connected by an upper connecting pipe. The layout can be set freely and the land can be used efficiently. Moreover, the trapping of the pollutants is performed in a plurality of treatment tanks, so that the trapping of pollutants can be reduced and the trapping capacity of the entire pollutant trapping facility can be increased.

The lower chamber of the processing tank on the upstream side and the lower chamber of the processing tank on the downstream side are preferably connected by a lower connecting pipe. In this case, the lower part of the upstream processing tank Waste water that cannot capture the contaminants in the chamber is sent to the lower chamber of the downstream processing tank by the lower connecting pipe, and the contaminants can be captured in the lower chamber.
Moreover, it is preferable that the said processing tank consists of the resin-made division | segmentation shells divided | segmented into plurality, In this case, since the division | segmentation shell is lightweight, the operation | work becomes easy when newly installing a processing tank.

  It may be difficult to newly install a treatment tank included in the facility for capturing contaminants due to site problems and economic problems. Therefore, the treatment tank can be an existing one. In this case, the present invention provides a tank main body, an inlet for allowing waste water containing contaminants to flow into the tank main body, and the waste water to the outside of the tank main body. A method for constructing a pollutant trapping facility in which a pollutant trapping structure for lowering the content rate of the pollutant is installed in an existing processing tank having an outlet to be flowed out, and a plurality of the existing processing Of the tanks, a connecting pipe attaching step for connecting the outlet of the processing tank on the upstream side and the inlet of the processing tank on the downstream side by a connecting pipe, and a plurality of the existing processing tanks In each of the tank main bodies, there is a structure installation step of installing the contaminant capturing structure, and the contaminant capturing structure includes the upper chamber into which wastewater flows, Up and down the lower chamber that captures the contaminants contained in the wastewater A partition floor to be defined, and a weir that stops wastewater that has flowed into a first region that is a part of the partition floor and that allows the wastewater to overflow to a second region outside the first region on the partition floor And an outlet for flowing waste water blocked by the weir to the lower chamber, and an outlet for flowing waste water in the lower chamber to the second region.

  According to the present invention, the outlet of the existing processing tank on the upstream side and the inlet of the existing processing tank on the downstream side are connected by the upper connecting pipe, and the contaminant trapping is performed in the tank body of each of these processing tanks. By installing the structural body, a pollutant capturing facility is constructed. In this way, by using the existing treatment tank, it is possible to obtain the pollutant capturing facility by efficiently using the land. Moreover, the trapping of the pollutants is performed in a plurality of treatment tanks, so that the trapping of pollutants can be reduced and the trapping capacity of the entire pollutant trapping facility can be increased.

  ADVANTAGE OF THE INVENTION According to this invention, while having the capability to reduce the content rate of a pollutant and to let a wastewater flow downstream, a pollutant capture facility can be obtained efficiently using land.

It is a perspective view which shows one Embodiment of a contaminant capture | acquisition equipment. It is sectional drawing which looked at the processing tank and the structure for trapping contaminants from above. It is sectional drawing which looked at the processing tank and the structure for contaminant capture from the side. It is explanatory drawing which shows the structure for contaminant acquisition of 2nd Embodiment, and a processing tank. It is sectional drawing which looked at the structure for contaminant acquisition of 3rd Embodiment and the processing tank from the side. FIG. 3 is a cross-sectional view of the contaminant capturing structure shown in FIG. It is explanatory drawing of an inspection window. It is explanatory drawing of an inlet_port | entrance part. (A) is sectional drawing which looked at the structure for contaminant acquisition and a processing tank from the side, and (b) is sectional drawing seen from the top. It is a top view which shows the modification of the structure for contaminant acquisition. It is a perspective view which shows the modification of the structure for contaminant acquisition. It is sectional drawing which looked at the contaminant capture structure of 4th Embodiment and a part of processing tank from the side. It is explanatory drawing of a contaminant capture facility and its construction method. It is explanatory drawing of a contaminant capture facility. It is explanatory drawing of a contaminant capture facility. It is sectional drawing which looked at the processing tank and the structure for trapping contaminants from the side, and shows a modification example of the attachment portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[1 Contaminant capture facility and treatment tank]
[1.1 Pollutant capture equipment]
FIG. 1 is a perspective view showing an embodiment of a contaminant trapping facility, and a part thereof is shown in cross section. This pollutant capture facility is a facility for reducing the content of pollutants contained in wastewater and causing the wastewater to flow downstream. For example, the treatment tank 4 installed in the ground and the pollutants In order to capture the wastewater, the contaminant capturing structure 1 is provided in the treatment tank 4. In addition, in this embodiment, the processing tank 4 consists of a manhole installed in the ground.

  The wastewater is, for example, rainwater that has flowed from a road to a gutter during rainfall, and the rainwater flows into the treatment tank 4. This rainwater contains pollutants, such as earth and sand accumulated on the road, dust, particulate matter discharged from automobiles and floating in the air, and automobiles due to accidents, etc. There are oils such as oil and fuel that flowed out of the tank. The rainwater mixed with such contaminants reaches the treatment tank 4 installed in the ground, such as on the side of the road, from the side groove of the road.

[1.2 Treatment tank 4]
An opening 4c that opens to the road surface is provided on the upper wall 4a of the treatment tank 4 (manhole), and is usually closed by a manhole cover 4d. The treatment tank 4 has an inlet 41 for introducing waste water containing pollutants, a tank body 42 for reducing the content of waste water inflow waste, and an outlet 43 for discharging waste water to the outside of the tank body 42. Have. The inflow port 41 and the outflow port 43 are provided on the side wall 4 b of the processing tank 4, and an inflow pipe 44 extending from the side groove (not shown) on the upstream side is connected to the inflow port 41. An outflow pipe 45 is connected to the.

  The tank main body 42 includes an upper chamber 5 through which waste water flows into the tank main body 42 and out of the tank main body 42 by the partition floor 7 of the contaminant capturing structure 1, and the upper chamber 5. It is divided into upper and lower compartments 6 formed below. As will be described later, in the lower chamber 6, contaminants are captured in cooperation with the contaminant capturing structure 1. The tank main body 42 has a cylindrical shape having a space inside, and in the upper chamber 5, waste water exists on the lower side and the upper side forms a space, but in the lower chamber 6, the waste water becomes full.

[1.3 Other Examples of Pollutant Capture Equipment]
As described above, the pollutant trapping facility may be composed of a single processing tank 4 and the pollutant trapping structure 1 installed in the processing tank 4. The structure which consists of the processing tank group which consists of, and the structure 1 for contaminant capture | acquisition installed in each of these processing tanks 4 may be sufficient. That is, as shown in FIG. 13B, an upstream processing tank 4U and a downstream processing tank 4D each having an inlet 41, a tank body 42, and an outlet 43 are provided. 4U and 4D are provided in series at intervals in the upstream and downstream directions of the wastewater. And the contaminant capture structure 1 is provided in each of the treatment tanks 4U and 4D. In FIG. 13B, the contaminant capturing structure 1 is illustrated in a simplified manner. And the upper connection pipe 49 which connects the outflow port 43 of the upstream processing tank 4U and the inflow port 41 of the downstream processing tank 4D is provided.

  In the lower chamber 6 of each of the treatment tanks 4U and 4D, contaminants contained in the waste water are captured. In this embodiment, the lower chamber 6 of the upstream treatment tank 4U and the downstream treatment tank The 4D lower chamber 6 is connected to the lower connecting pipe 50. For this reason, the waste water that could not capture the contaminants in the lower chamber 6 of the upstream processing tank 4U flows into the lower chamber 6 of the downstream processing tank 4D through the lower connecting pipe 50, and the lower chamber of the processing tank 4D. 6 makes it possible to capture contaminants.

In addition, in the embodiment of FIG. 13B, in addition to the case where the processing tanks 4U and 4D are newly installed, the processing tanks 4U and 4D can be made existing.
In this case, the construction method of the pollutant capturing equipment is as follows. As shown in FIG. 13A, existing treatment tanks (manholes) 4U and 4D exist in the ground. And as shown in FIG.13 (b), the construction method of a contaminant capture | acquisition equipment is the outflow port 43 of the processing tank 4U used as the upstream of the two existing processing tanks 4U and 4D, The connecting pipe mounting step S1 for connecting the inlet 41 of the processing tank 4D on the downstream side by the upper connecting pipe 49 and the lower connecting pipe 50, and trapping the contaminants in the tank main body 42 of each of the processing tanks 4U, 4D And a structure installation step S2 for installing the structural body 1.

  As for the construction order of the connecting pipe attachment step S1 and the structure installation step S2, the step S1 and the step S2 are performed in parallel when the step S1 is performed first and when the step S2 is performed first (even if the start timing is different) Sometimes.

When newly installing the processing tanks 4U and 4D and the contaminant capturing structure 1, the outlet 43 of the upstream processing tank 4U and the inlet 41 of the downstream processing tank 4D are connected by an upper connecting pipe 49. By installing the contaminant capturing structure 1 in each of the treatment tanks 4U and 4D, a contaminant capturing facility can be configured. For this reason, the layout of the processing tanks 4U and 4D can be freely set at the time of new installation, and the land can be used efficiently.
When using the existing processing tanks 4U and 4D, the outlet 43 of the existing processing tank 4U on the upstream side and the inlet 41 of the existing processing tank 4D on the downstream side are connected by the upper connecting pipe 49, By installing the pollutant capturing structure 1 in each of these treatment tanks 4U and 4D, a pollutant trapping facility is configured. Thus, by using the existing treatment tanks 4U and 4D, it is possible to obtain the pollutant capturing facility by efficiently using the land.

In both the case where a treatment tank is newly installed and the case where an existing treatment tank is used, the trapping of contaminants is performed in the treatment tanks 4U and 4D. Since these treatment tanks 4U and 4D are provided in series, the contaminants are collected. Spillage can be reduced, and the ability to capture contaminants can be increased.
The contaminant capturing structure 1 installed in each of the treatment tanks 4U and 4D is the same. Hereinafter, the contaminant capturing structure 1 installed in the treatment tank will be described.

[2 Contaminant capturing structure 1]
[2.1 First Embodiment]
FIG. 2 is a cross-sectional view of the treatment tank 4 and the contaminant capturing structure 1 as seen from above. 1 and 2, the pollutant capturing structure 1 is used for trapping pollutants contained in waste water in the tank body 42 (lower chamber 6) and causing the waste water to flow out of the tank body 42. It is installed at an intermediate height position in the tank body 42. The pollutant capturing structure 1 includes the partition floor 7, a dam portion 8 that dams waste water that has flowed into the first region 11 that is a part of the partition floor 7, and the dam portion An inlet portion 9 for flowing wastewater blocked by the flow into the lower chamber 6 and an outlet portion 10 for flowing wastewater accumulated in the lower chamber 6 to the second region 12 outside the first region 11 on the partition floor 7. I have.
Each of the inlet portion 9 and the outlet portion 10 of the present embodiment has a pipe member (water guide pipe described later) 9a and a pipe member 10a. The pipe members 9a, 10a and the weir portion 8 are integrated with the partition floor 7. It is provided.

  The contaminant capturing structure 1 includes a hollow tube 19 that ventilates the lower chamber 6 and the upper chamber 5. The lower end of the hollow tube 19 is attached to the partition floor 7 and extends upward, and the upper end thereof is set higher than the upper end of the weir part 8. The hollow tube 19 is used for venting air that causes the air in the lower chamber 6 to be vented to the upper chamber 5 when waste water in the upper chamber 5 flows into the lower chamber 6.

  The partition floor 7 has an outer peripheral contour shape common to the entire circumference of the inner peripheral surface of the tank main body 42, and a main body portion 13 that is a portion that vertically partitions the tank main body 42, and downward from the outer peripheral edge of the main body portion 13. And a cylindrical portion 14 that extends and fits into the side wall 4b. The tube portion 14 and the main body portion 13 are configured as an integral unit. Further, the contaminant capturing structure 1 includes an attachment portion 15 for attaching the partition floor 7 to the tank body 42. The attachment portion 15 can be detached from the tank body 42 as a whole of the partition floor 7. The configuration of the attachment portion 15 will be described later.

The dam portion 8 is constituted by a part of the partition floor 7 and is formed as a raised portion that gradually increases from the inlet 41 side. The dam portion 8 dams up the wastewater flowing into the first region 11 and allows the wastewater to overflow to the second region outside the first region 11. The inflowing wastewater is collected by the weir part 8, but the inflow amount of the wastewater increases and the water level exceeds the top part 8t, so that the wastewater overflows the top part 8t. A region where waste water is blocked by the weir unit 8 is a first region 11, and a region other than the first region 11 is a second region 12. The second region 12 is at a lower position than the first region 11. Further, the floor surface of the second region 12 is a horizontal surface, and the floor surface of the second region 12 is set to be substantially the same height as the lower end of the outlet 43.
A bottom 7a having a horizontal surface is formed in the center of the bottom of the partition floor 7 on the upstream side (inlet 41 side) of the weir 8 and the pipe member 9a is attached to the bottom 7a. It has been. The bottom 7a is a part of the partition floor 7.

  FIG. 3 is a sectional view seen from the side. The pipe member 9 a of the inlet portion 9 is attached to the first region 11 of the partition floor 7. The upper end of the pipe member 9 a is open to the upper chamber 5, and the lower end is located below the lower surface 13 a of the main body 13 of the partition floor 7, and is open in the lower chamber 6. The upper end opens upward, but the lower end opens in the circumferential direction (horizontal direction) of the tank body 42. As a result, the wastewater blocked by the dam 8 flows down to the lower chamber 6 through the pipe member 9a and is discharged in the horizontal direction from the lower end of the pipe member 9a. The wastewater is slowly released in the circumferential direction in the lower chamber 6. A recirculating flow.

  In particular, the pipe member 9a of the inlet portion 9 is composed of a water guide pipe having a circular cross section in order to guide the waste water to the lower chamber 6 as a vortex. According to such a water guide pipe, the waste water blocked by the dam portion 8 is guided to the lower chamber 6 as a vortex, so that the contaminants floating near the water surface of the waste water blocked by the dam portion 8 ( In particular, the oil component) is engulfed in the vortex of the waste water and easily flows into the lower chamber 6.

  Since the lower chamber 6 has a larger cross section than the inflow portion 41 and the pipe member 9a, the flow rate of the wastewater discharged into the lower chamber 6 is much slower than the flow rate of the wastewater passing through the inflow portion 41 and the tube member 9a. . For this reason, of the pollutants contained in the wastewater, for example, particulate matter is deposited as deposits in the lower chamber 6 which is in a full state, and the oil content in the pollutants is in the lower portion in a full state. It becomes levitated material in the chamber 6. For this reason, the sediment and the levitated matter are captured in the lower chamber 6.

The pipe member 10a of the outlet portion 10 is attached to the second region 12 of the partition floor 7, and has an upper end that opens upward and a lower end that opens downward. In FIG. 3, the upper end of the pipe member 10 a is opened at the same height as the second region 12, and the lower end is located below the lower surface 13 a of the main body 13 of the partition floor 7 and opens in the lower chamber 6. is doing.
Further, at the normal time, the level of the wastewater blocked by the dam portion 8 in the first region 11 is higher than the level of the wastewater in the second region 12. For this reason, the waste water in the upper chamber 5 naturally flows to the lower chamber 6 through the pipe member 9a, and the waste water in the lower chamber 6 flows naturally to the second region of the upper chamber 5 through the pipe member 10a. it can.

Further, in the first region 11, the depth from the bottom 7a on the partition wall 7 to the top 8t of the weir 8 determines the water depth when the wastewater overflows. The height is, for example, 150 mm. Set to degree. In this case, the difference between the bottom 7a and the height of the floor surface of the second region 12 is about 75 mm. As will be described later, in another pollutant capturing structure 1 (see FIG. 11), the height from the bottom 7a to the top 8t of the weir 8 is set to about 200 mm. The difference with the height of the floor surface of the 2 area | region 12 is about 25 mm.
In addition, although the height difference of the height of the dam part 8 and the height of the bottom part 7a and the floor surface of the 2nd area | region 12 can be set arbitrarily, the wastewater of the 1st area | region 11 and the 2nd area | region 12 is set. It affects the water head difference and affects the flow rate of waste water in the treatment tank 4. For this reason, these values are set in the lower chamber 6 so that the waste water flows slowly enough to allow the contaminants to settle or float.

1 and 3, the attachment portion 15 for attaching the partition floor 7 to the tank body 42 will be described. The attachment portion 15 extends upward from the outer peripheral edge of the main body portion 13 of the partition floor 7 and has a flange portion 16 having a shape that fits into the inner peripheral surface of the side wall 4b of the tank main body 42, and the flange portion 16 attached to the flange portion 16. It has the bolt 17 as a fixing member which fixes the part 16 to the side wall 4b. In addition, the collar part 16 and the main-body part 13 are comprised integrally. The collar part 16 of this embodiment is a cylinder shape which has a shape along the perimeter of the internal peripheral surface of the side wall 4b.
In the enlarged view of FIG. 3, an anchor member 18 having a screw hole is embedded in the side wall 4b, a through hole 16a is formed in the flange portion 16, and a bolt 17 is inserted through the through hole 16a and anchored. Screwed to the member 18. The bolts 17, the anchor members 18 and the through holes 16a are provided at a plurality of locations in the circumferential direction.

  According to the attachment portion 15, the partition floor 7 can be fixed to the tank body 42 as a whole, and the partition floor 7 can be removed from the tank body 42 as a whole by removing the bolts 17. Furthermore, since this bolt 17 is provided on the upper side from the upper surface of the main body portion 13 of the partition floor 7, the operator can remove the partition floor 7 (the contaminant capturing structure 1) from the upper chamber 5 side. It becomes easy.

In addition, a handle is provided in the central portion on the upper surface side of the partition floor 7, and in the present embodiment, this handle includes the hollow tube 19. That is, when removing the partition floor 7 (contaminant capturing structure 1), the operator can grasp the hollow tube 19 and the removal work becomes easy.
The compartment floor 7, the dam 8 integrated with the compartment floor 7, the pipe members 9a and 10a, the hollow tube 19, the cylindrical portion 14, and the flange portion 16 can be made of metal, but the weight is reduced. Therefore, in this embodiment, it is made of resin, and it is particularly preferable to use FRP.

According to the pollutant capturing facility as described above, the pollutant contained in the wastewater can be captured in the lower chamber 6 to reduce the content of the pollutant and flow out of the treatment tank 4.
And since the dam part 8, the pipe member 9a of the inlet part 9, the pipe member 10a of the outlet part 10, etc. are provided in the division floor 7, the structure 1 for contaminant capture | acquisition can be handled as an integrated object. . And since this division floor 7 can be removed from the tank main body 42 as a whole by the attachment part 15 provided with the collar part 16 and the volt | bolt 17, the structure 1 for contaminant capture | acquisition can be removed from the tank main body 42 whole. .

For this reason, for example, in order to perform cleaning for removing the contaminants accumulated in the lower chamber 6, the bottom of the treatment tank 4 from which the waste water is extracted and the contaminant capturing structure 1 is removed (corresponding to the lower chamber 6). Worker) can enter the space.
For this reason, it is not necessary to provide a dedicated passage (manhole) for the operator to enter, so that even if the treatment tank 4 is small, the structure for capturing contaminants 1 can be applied. For example, the contaminant capturing structure 1 can be installed in the treatment tank 4 having an inner diameter of about 1200 mm or 900 mm. The processing tank 4 may be a newly installed manhole, but can also be an existing manhole.

FIG. 16 is a cross-sectional view of the treatment tank 4 and the contaminant capturing structure 1 as viewed from the side, and shows a modified example of the attachment portion 15. In FIG. 16, although the form of the attachment part 15 differs from FIG. 3, the other is the same as FIG. That is, the attachment part 15 of FIG. 16 has the fixing member 117 which is fixed to the side wall 4b of the processing tank 4 and supports the partition floor 7 from the bottom.
In the embodiment of FIG. 16, the fixing member 117 is an L-shaped member having an orthogonal piece 117 a and an other piece 117 b, and the piece 117 a is fixed to the side wall 4 b by bolts (anchors) 118. And the other piece 117b will be in the state which protruded to the center side of the processing tank 4 from the side wall 4b. The fixing member 117 is installed at the same height at a plurality of locations in the processing tank 4.

  In this case, one piece 117 a of the fixing member 117 is fixed to the side wall 4 b of the processing tank 4, and the cylindrical portion 14 of the partition floor 7 is placed on the other piece 117 b of the fixing member 117, thereby the contaminant capturing structure 1. Can be attached to the treatment tank 4. Moreover, since the division floor 7 is supported by the fixing member 117 only in a state where the division floor 7 is placed on the other piece 117b, the division floor 7 is lifted upward to be removed from the processing tank 4 as a whole. It becomes possible. In this case, the installation height of the division floor 7 can be adjusted by setting the installation height of the fixing member 117 before installing the division floor 7 in the treatment tank 4. Can be increased.

[2.2 Second Embodiment]
FIG. 4 is an explanatory view showing a part of the contaminant capturing structure 1 and the treatment tank 4 of the second embodiment, (a) is a sectional view seen from above, and (b) is a side view. It is sectional drawing seen from the direction. In the second embodiment and the first embodiment, the configuration of the treatment tank 4 is the same, and in the contaminant capturing structure 1, the partition floor 7, the weir portion 8, the inlet portion 9, and the outlet portion 10. And the basic structure for exhibiting each function is the same for each of the hollow tube 19.

  Moreover, in this 2nd Embodiment and the said 1st Embodiment (FIG. 3), the inlet part 9 is a structure which can be disassembled. That is, as shown in FIG. 3 and FIG. 4 (b), the pipe member 9 a of the inlet portion 9 includes the first member 9 a-1 and the first member 9 a that are fixed to the main body portion 13 of the partition floor 7. -1 is attached to the upper part of the second member 9a-2 having a cylindrical portion 21 serving as a waste water intake, and the third member 9a is attached to the lower part of the first member 9a-1 and has a waste water discharge port -3. The tube member 9a is assembled by fitting the second member 9a-2 and the third member 9a-3 into the first member 9a-1, and the second member 9a-2 and the third member 9a-. 3 is removable from the first member 9a-1.

And the structure which is different from the contaminant capturing structure 1 of the first embodiment is that a part of the partition floor 7 including at least one of the weir part 8, the inlet part 9, and the outlet part 10 is divided into the part. It is a point provided with the hinge part 20 opened and closed by bend | folding with respect to the remaining part of the floor 7. FIG.
In the contaminant capturing structure 1 of the second embodiment in FIG. 4, a portion A <b> 1 including the inlet portion 9 (first member 9 a-1) in the compartment floor 7 is formed by the hinge portion 20 (cross hatching in FIG. 4). Is a structure that bends with respect to the remaining portion A2 other than the portion A1.
The area (vertical dimension and horizontal dimension) of the part A1 is a size that does not hinder the passage of the operator. The operator can enter the lower chamber 6 from the upper chamber 5 through an opening formed by the portion A1 being flipped up by the hinge portion 20 to be in the open state.
Note that the second member 9a-2 and the third member 9a-3 of the tube member 9a are removed from the first member 9a-1 in order to bend and open the part A1 upward.

[2.3 Third Embodiment]
FIG. 5 is a cross-sectional view of a part of the contaminant capturing structure 1 and the processing tank 4 according to the third embodiment as viewed from the side. In the third embodiment and each of the embodiments described above, the configuration of the treatment tank 4 is the same, and in the contaminant capturing structure 1, the compartment floor 7, the weir portion 8, the inlet portion 9, the outlet portion 10, And about each of the hollow tube 19, the basic composition for exhibiting each function is the same.
This 3rd Embodiment is a modification of 2nd Embodiment, and a different point from the structure 1 for contaminant capture | acquisition of 2nd Embodiment is a part opened and closed by the hinge part 20 in the division floor 7. FIG. . In the third embodiment, a part A11 including the dam part 8 (part of the dam part 8) in the division floor 7 is made to the remaining part A12 in the division floor 7 by the hinge part 20. Opens and closes by bending.

  Thus, since a part of dam part 8 opens and closes, the structure of the said dam part 8 and the exit part 10 differs from the said each embodiment. That is, the part of the dam part 8 that is opened and closed by the hinge part 20 is composed of the flat plate member 8a, and the cross-sectional area of the outlet part 10 (pipe member 10a) does not hinder the passage of the operator. large. A part of the outlet portion 10 exists below the flat plate member 8a. With this configuration, the operator can pass through the outlet portion 10 by raising the flat plate member 8a without making the weir portion 8 small (lower) and when cleaning the lower chamber 6.

  According to the above 2nd Embodiment and 3rd Embodiment, the hinge part 20 can be opened by bend | folding a part (A1 or A11) of the division floor 7 with respect to the remaining part (A2 or A12). . For this reason, in order to perform the cleaning for removing the contaminants accumulated in the lower chamber 6, the worker is brought into the bottom of the treatment tank 4 from which the waste water has been extracted through the opening formed by opening the part (A1 or A11). Can enter. Therefore, it is not necessary to provide a dedicated passage (manhole) for the operator to enter, and the contaminant capturing structure 1 can be applied even if the treatment tank 4 is small. .

[3 Other functional parts of the contaminant capturing structure 1]
Other functional units that can be provided in the contaminant capturing structure 1 of each of the embodiments will be described. Note that the following functional units are applicable to each of the embodiments.
[3.1 Inspection window 22]
FIG. 6 is a cross-sectional view of the contaminant capturing structure 1 shown in FIG. The contaminant capturing structure 1 includes an inspection window 22 for allowing an operator to visually confirm the interior of the lower chamber 6 from the upper chamber 5. The inspection window 22 is provided in a part of the division floor 7. In the present embodiment, the inspection window 22 is provided in the floor portion 7 b in the first region 11 in the main body portion 13 of the division floor 7. The floor portion 7b is a portion formed on both sides of the inlet portion 9 (the bottom portion 7a) and has a horizontal shape.

FIG. 7 is an explanatory view of the inspection window 22, (a) is a sectional view seen from the side, and (b) is a plan view. The inspection window 22 includes a window main body member 22a made of a material that transmits visible light, and the window main body portion 22a is made of, for example, transparent and colorless glass. The inner peripheral surface and the outer peripheral surface of the window main body member 22a have a conical shape that is pointed downward, and are attached to through holes 7c formed in the floor portion 7b.
A scale 23 is attached to the window main body 22a. The scale 23 indicates the dimension in the height direction, and indicates the depth from the lower surface 7b-b of the floor portion 7b. As described above, in the lower chamber 6, the wastewater is in a full state, and the oil content in the pollutants contained in the wastewater floats up in the lower chamber 6 and becomes a floating substance F. Therefore, the operator can confirm the amount (captured amount) of the floating substance F from the upper chamber 5 side by the window main body member 22a and the scale 23, and it is easy to confirm whether or not the treatment tank 2 needs to be cleaned. It becomes.

[3.2 Cylindrical portion 21 of entrance portion 9]
As described above, the pipe member 9a (see FIG. 1) of the inlet portion 9 is composed of a water conduit that guides the waste water to the lower chamber 6 as a vortex, but in order to easily generate a vortex, the pipe member 9a is shown in FIG. As shown, the inlet portion 9 has a cylindrical portion 21 that protrudes upward from the bottom portion 7a of the first region 11 and takes in wastewater from the upper end portion. In the present embodiment, the cylindrical portion 21 is provided on the second member 9a-2 of the tube member 9a.
In the inlet portion 8 and its peripheral portion of the first region 11, the weir portion 8 and the floor portions 7 b on both sides are higher than the bottom portion 7 a, have a substantially mortar shape, and a cylindrical portion 21 is provided at the center. It has been. For this reason, the wastewater flowing in from the inflow port 41 is blocked by the dam portion 8 and can be guided along the outer periphery of the cylindrical portion 21 to flow in the circumferential direction, and the wastewater is discharged from the upper end portion of the cylindrical portion 21. The eddy current can be easily generated at the inlet portion 9. As a result, the contaminants (especially oil) floating near the water surface of the wastewater blocked by the dam portion 8 are entangled in the vortex of the wastewater and easily flow into the lower chamber 6.
Moreover, the opening of the upper end of the cylindrical part 21 used as a waste water intake is set to the smallest area in the inlet part 9 (pipe member 9a), and constitutes an orifice.

[3.3 (Conductor pipe) at entrance 9]
As described with reference to FIG. 3, the tube member 9 a is configured to be disassembled. That is, the second member 9a-2 having the cylindrical portion 21 and the third member 9a-3 having the discharge port can be detached from the first member 9a-1. For this reason, the 3rd member 9a-3 can be replaced | exchanged for the thing of different length, As a result, the full length of the pipe member 9a (water guide pipe) can be changed.
In order to facilitate replacement of the third member 9 a-3, the third member 9 a-3 has a handle 24 that extends upward and is exposed in the upper chamber 5. The operator can easily remove the third member 9 a-3 by pulling up the handle 24, and can easily attach the third member 9 a-3 using the handle 24.

  Thus, by changing the total length of the pipe member 9a, the height position of the discharge port of the pipe member 9a can be changed according to the depth of the lower chamber 6 and the inflow amount of waste water. In addition, by increasing the total length, the flow rate of waste water can be controlled (for example, it can be averaged). In addition, although the change of the full length of the pipe member 9a may be performed by replacing the third member 9a-3 as described above, the pipe member 9a may be configured to expand and contract as, for example, a bellows structure.

[3.4 Filter 25 of Weir Portion 8]
As shown in FIG. 6, the weir portion 8 is provided with a filter 25 that receives foreign substances that are about to flow along with the overflowing wastewater. The filter 25 is made of a mesh member (screen), and the lower part thereof is attached to the weir part 8. The upper end of the filter 25 is set higher than the top part of the weir part 8. Further, the upper end of the filter 25 is It is set to be higher than the height of the wastewater that flows over the section 8.
For example, large floating substances such as plastic bottles remain floating near the surface of the wastewater blocked by the dam portion 8 and may not flow into the lower chamber 6 from the inlet portion 9 and are collected by the tank body 42. However, according to the filter 25, such suspended matter can be collected by the tank body 42.

  Although not shown, a part of the filter 25 may be inflated to the downstream side (second region 12 side). In this case, foreign matter can be accumulated in the inflated region, and foreign matter can be easily collected. . In addition, when wastewater overflows the weir part 8, it is an emergency when the amount of inflow to the wastewater treatment tank 4 has become larger than the assumed value, and all other wastewater that has flowed in during other normal times It is dammed up by the dam part 8 and is discharged to the outside after passing through the lower chamber 6, the outlet part 10, and the second region 12.

[3.5 Dam plate 26 of lower chamber 6]
FIG. 9A is a cross-sectional view of the pollutant capturing structure 1 and the treatment tank 4 as viewed from the side, and FIG. 9B is a cross-sectional view as viewed from above. The contaminant capturing structure 1 includes a weir plate 26 installed in the lower chamber 6. The dam plate 26 is made of a plate member in which a plurality of slits 26a through which waste water passes is formed, and each slit 26a is made of a vertically long thin hole.
The barrier plate 26 has a width dimension substantially the same as the inner diameter of the lower chamber 6 and has a height located above the discharge port at the lower end of the tube member 9a and the suction port at the lower end of the tube member 10a. The lower chamber 6 is substantially divided into the inlet 9 side and the outlet 10 side. In FIG. 9A, the deposit S deposited on the bottom wall 4e is a contaminated sediment that is contained in the wastewater and has precipitated.

  The wastewater that has flowed from the upper chamber 5 to the lower chamber 6 circulates in the lower chamber 6 in the circumferential direction, but the flow rate of the wastewater that has passed through the slit 26a becomes even slower. Thus, by slowing down the flow rate of the waste water, the sediment S is prevented from being stirred, and the contaminants floating in the lower chamber 6 are easily deposited as sediment on the bottom wall 4e. Moreover, it is made easy to capture in the lower chamber 6 as the float F. Further, the upper end of the barrier plate 26 is set lower than the lower surface of the main body 13 of the partition floor 7. Thereby, the capture allowable amount of the floating object F is not reduced, and the capture of the floating object F is not disturbed.

[3.6 Second Region 12 of Upper Chamber 5]
The top 8t of the weir plate 8 shown in FIG. 2 is linear, and the waste water overflows from this top 8t. The waste water that has overflowed the weir part 8 falls to the second region 12 and is then discharged out of the tank body 42 through the outlet 43. For this purpose, the second region 12 causes the wastewater flowing out from the outlet 10 and the wastewater overflowing from the weir 8 to flow out of the tank body 42 through the outlet 43 formed in the side wall 4b of the tank body 42. For this reason, it is a region that temporarily receives the wastewater and has an outer peripheral contour shape along the side wall 4b.
In FIG. 2, an angle θ (range of the second region 12) indicating the planar expansion of the second region 12 with respect to the center C of the tank body 42 is approximately 90 °. In this embodiment, since the axis 41c of the inflow port 41 and the axis 43c of the outflow port 43 are arranged on a straight line passing through the center C, the waste water in the second region 12 can flow to the outflow port 43.

It should be noted that even if the axis 43c of the outlet 43 is bent about 30 ° (not shown) with respect to the axis 41c of the inlet 41, this embodiment can cope with it.
However, when the axis 43c of the outlet 43 is bent about 90 ° with respect to the axis 41c of the inlet 41, the contaminant capturing structure 1 of each of the above embodiments cannot cope. Therefore, according to the contaminant capturing structure 1 shown in FIG. 10, even this case can be handled.

  FIG. 10 is a plan view showing a modification of the contaminant capturing structure 1. This structure 1 for pollutant trapping has the basic configuration for exerting each function with respect to each of the above-described embodiments and each of the partition floor 7, the weir part 8, the inlet part 9, the outlet part 10, and the hollow tube 19. The same. However, in this embodiment, the outer peripheral contour shape of the second region 12 is a shape having a length that extends more than half of the entire inner periphery of the side wall 4b. That is, the second region 12 has a range of 180 ° or more (θ ≧ 180 °) on the partition floor 7 along the outer peripheral portion of the partition floor 7 as a range other than the first region 11. In the present embodiment, there is a range of θ = 300 °, the region indicated by cross hatching in FIG. 10 is the second region 12, and the other region is the first region 11.

According to this contaminant capturing structure 1, even if the inlet 41 and the outlet 43 are not arranged in a straight line, that is, as shown in FIG. Even if the direction of the head is bent by about 90 °, it can be applied without modifying the contaminant capturing structure 1.
In the pollutant capturing structure 1 in FIG. 10, the overflow portion (top portion 8t) is prevented from being shortened by making the weir portion 8 (top portion 8t) into a semicircular shape extending 180 ° in plan view. . Further, the floor portion 7b is narrower than that in FIG. 2, and walls 27 having a height equal to or higher than the top portion 8t of the weir portion 8 are provided on both sides of the floor portion 7b.

  FIG. 11 is a perspective view showing a modified example of the contaminant capturing structure 1. Compared with the configuration of FIG. 10, the contaminant capturing structure 1 is different in the size of the partition wall 7, the shape of the dam portion 8, the diameter of the outlet portion 9, and the arrangement of the hollow tubes 19. The basic configuration for performing each function is the same for each of the floor 7, the dam portion 8, the inlet portion 9, the outlet portion 10, and the hollow tube 19. Moreover, the contaminant capturing structure 1 in FIG. 11 is suitable for the treatment tank 4 having a larger size than that in FIG.

[4 Other Embodiment of Pollutant Treatment Equipment 1 (Fourth Embodiment)]
FIG. 12 is a cross-sectional view of a part of the contaminant capturing structure 1 and the processing tank 4 according to the fourth embodiment as viewed from the side. In the contaminant capturing structure 1 of each of the embodiments, the partition floor 7 is newly provided in the treatment tank 4, but the contaminant capturing structure 1 in FIG. 12 has the partition floor 46 already installed. This is provided in the treatment tank 4. That is, the treatment tank 4 includes a partition floor 46 that partitions into an upper chamber 5 and a lower chamber 6, and the contaminant capturing structure 1 of the present embodiment captures contaminants in the lower chamber 6 and waste water. Is attached to the existing divided floor 46 in order to flow out of the processing tank 4.

  The contaminant capturing structure 1 includes a weir portion 8, an inlet portion 9, and an outlet portion 10. About each of the dam part 8, the inlet part 9, and the outlet part 10, the basic composition for exhibiting each function is the same as each said embodiment. That is, the weir unit 8 blocks the wastewater flowing from the inlet 41 into the first region 11 that is a part on the partition floor 46 and also discharges the wastewater outside the first region on the partition floor 46. 2 Overflow to area 12 is possible. The pipe member 9a of the inlet portion 9 allows waste water blocked by the dam portion 8 to flow into the lower chamber 6. The pipe member 10a of the outlet portion 10 allows waste water accumulated in the lower chamber 6 to flow into the upper chamber. It flows to the second region 12 on the 5 side. The pipe member 9a of the inlet portion 9 functions as a water conduit that guides wastewater blocked by the dam portion 8 to the lower chamber 6 as a vortex.

The difference between the pollutant capturing structure 1 of the present embodiment and each of the above embodiments is that, in each of the above embodiments, the weir portion 8, the inlet portion 9, and the outlet portion 10 are integrated with each other. In the embodiment, the dam portion 8 and the inlet portion 9 are configured as one body, but the dam portion 8 and the outlet portion 10 are separate.
And in this embodiment, since the division floor 46 is an existing thing as mentioned above, the through-holes 47 and 48 penetrated up and down are formed in the said division floor 46, and the pipe member of the inlet_port | entrance part 9 is formed in one through-hole 47 9a is inserted, and the dam 8 integrated with the pipe member 9a is placed on the partition floor 46. Further, the tube member 10 a of the outlet portion 10 is inserted through the other through hole 48. Thereby, the dam part 8, the inlet part 9, and the outlet part 10 can be made into the state attached to the division floor 46. FIG.

Although not shown, a through hole may be further provided in the partition floor 46, and a hollow tube 19 (see FIG. 11) for ventilating the lower chamber 6 and the upper chamber 5 may be provided.
Furthermore, also in this embodiment, the inspection window 22 (see FIG. 7) may be provided in the through-hole further formed in the partition floor 46 as the functional part, and for changing the total length of the pipe member 9a. The structure (refer to FIG. 3), the filter 25 (refer to FIG. 6) of the dam portion 8, the cylindrical portion 21 (refer to FIG. 8) of the inlet portion 9, and the dam plate 26 (refer to FIG. 9) of the lower chamber 6 are provided. Also good.

  As described above, according to the embodiment shown in FIG. 12, the pipe member 9 a and the dam portion 8 of the inlet portion 9 are configured as a single unit, and the partition floor 46 of the processing tank 4 has If the pipe members 9a and 10a of the inlet portion 9 and the outlet portion 10 are inserted and attached to the formed through holes 47 and 48, the contaminant capturing structure 1 can be completed. That is, the contaminant capturing structure 1 can be provided also in the treatment tank 4 in which the partition floor 46 is already installed. In this embodiment as well, it is preferable that the weir part 8, the inlet part 9, and the outlet part 10 are made of resin.

  Furthermore, according to this embodiment, since the weir part 8, the inlet part 9, and the outlet part 10 are separate bodies, the structure for capturing contaminants is not affected by the scale of the processing tank 4 and the size of the partition floor 46. A body 1 can be provided. That is, the positions of the through holes 47 and 48 are determined in accordance with the positions of the existing divided floor 46 and the inlet 41 and the outlet 43 formed in the tank main body 42, and the through holes 47 and 48 are set to the divided floor 46. What is necessary is just to form. Even if the processing tank 4 is provided with two (a plurality of) inlets 41, the two through holes 47 to which the pipe member 9a is attached are aligned with the inlet 41 (a plurality of locations). What is necessary is just to form in the division floor 46, and it becomes possible to obtain the structure 1 for contaminant acquisition according to the number of the inflow ports 41 in this way.

[5 Treatment tank 4]
Although the upper wall 4a, the side wall 4b, and the bottom wall 4e of the processing tank 4 (see FIG. 1) of each embodiment can be made of concrete, other materials may be used. For example, in particular, when the treatment tank 4 is newly installed, it can be made of resin. As shown in FIG. 14A, the divided shell 51 for the side wall divided into a plurality of parts in each of the circumferential direction and the axial direction. The side wall 4b of the processing tank 4 may be configured by the above. Moreover, the bottom wall 4e of the processing tank 4 can also be comprised by the division | segmentation shell 52 for bottoms made from resin.
In the embodiment of FIG. 14A, the side wall 4b is divided into two in the circumferential direction, and the divided shell 51 divided into two has a semicircular shape as shown in FIG. 14B. In the embodiment of FIG. 14 (a), one dish-shaped divided shell 52 is provided as the bottom wall 4e, and the side wall 4b thereon is divided into seven in the axial direction (height direction).

  Thus, when the processing tank 4 is comprised by resin-made divided shells 51 and 52, since the said divided shells 51 and 52 become lightweight, the operation | work which newly installs the processing tank 4 becomes easy. In order to ensure strength, it is preferable that the split shells 51 and 52 be FRP. Further, by adopting the divided shell 51 shown in FIG. 14B, the height of the processing tank 4 can be freely changed.

  Further, in order to increase the trapping ability of the contaminants (increase the trapping allowable amount), it is preferable to increase the volume of the lower chamber 6. For this purpose, as shown in FIG. 13B, the lower chambers 6 of the plurality of treatment tanks 4U and 4D may be connected by the lower connecting pipe 50. However, as shown in FIG. It is good also as the processing tank 4 which expanded the lower chamber 6 horizontally than 5 in the horizontal direction. In this case, a dedicated manhole 53 provided adjacent to the upper chamber 5 is installed in the processing tank 4 in order for an operator to enter the lower chamber 6 as maintenance such as cleaning of the lower chamber 6. . That is, the processing tank 4 may be configured such that the processing tank upper part 55 and the manhole pipe 53 constituting the upper chamber 5 are erected from the processing tank lower part 54 constituting the lower chamber 6.

Further, the present invention is not limited to the embodiment shown in the drawings, and may be other forms within the scope of the present invention. For example, in FIG. 1, although the inflow port 41 of the processing tank 4 was demonstrated in the side wall 4b, the inflow port 41 may be formed in the upper wall 4a. In this case, the waste water falls on the first region 11.
Moreover, in each said embodiment, although demonstrated as a case where the processing tank 4 was installed in the ground, you may install the processing tank 4 on the ground. In particular, when installed on the ground, the treatment tank 4 is preferably made of resin (see FIG. 14).
Further, by having a hollow tube 19 (see FIG. 1), a bar member for inspection (not shown) is passed through the intermediate tube 19 to measure the amount of sediment deposited in the lower chamber 6. Work becomes possible.

1: Contamination trapping device, 4, 4U, 4D: treatment tank, 5: upper chamber, 6: lower chamber, 7: compartment floor, 8: weir, 9: inlet, 10: outlet, 11: first region , 12: second region, 41: inlet, 42: tank body, 43: outlet, 49: upper connecting pipe (connecting pipe), 50: lower connecting pipe, 51: divided shell

Claims (4)

A treatment tank having a tank body, an inlet for allowing waste water containing pollutants to flow into the tank body, and an outlet for allowing waste water to flow out of the tank body;
A contaminant capturing structure installed in the tank body to reduce the content of contaminants contained in the wastewater flowing from the inlet,
A pollutant capturing facility in which a plurality of the treatment tanks are provided at intervals in the upstream and downstream direction of waste water,
An upper connecting pipe that connects the outlet of the processing tank on the upstream side and the inlet of the processing tank on the downstream side,
Each of the contaminant capturing structures is
A partition floor that vertically divides the treatment tank into an upper chamber into which wastewater flows and a lower chamber that captures contaminants contained in the wastewater;
A dam section that dams up wastewater that has flowed into a first region that is a part of the partition floor and allows the wastewater to overflow to a second region outside the first region on the partition floor;
An inlet for flowing waste water blocked by the weir to the lower chamber;
An outlet for flowing waste water in the lower chamber to the second region;
Contaminant capturing equipment characterized by having   The pollutant trapping facility according to claim 1, wherein the lower chamber of the processing tank on the upstream side and the lower chamber of the processing tank on the downstream side are connected by a lower connecting pipe.   The pollutant trapping facility according to claim 1 or 2, wherein the treatment tank is composed of a resin divided shell divided into a plurality of parts. The content rate of the pollutant is reduced in an existing treatment tank having a tank body, an inflow port for introducing waste water containing contaminants into the tank body, and an outflow port for discharging waste water to the outside of the tank body. A method for constructing a pollutant capturing facility for installing a pollutant capturing structure for
A connecting pipe attaching step for connecting the outlet of the processing tank on the upstream side and the inlet of the processing tank on the downstream side among the plurality of existing processing tanks by a connecting pipe,
In the tank body of each of the plurality of existing processing tanks, there is a structure installation step for installing the contaminant capturing structure.
The contaminant capturing structure is:
A partition floor that vertically divides the treatment tank into an upper chamber into which wastewater flows and a lower chamber that captures contaminants contained in the wastewater;
A dam section that dams up wastewater that has flowed into a first region that is a part of the partition floor and allows the wastewater to overflow to a second region outside the first region on the partition floor;
An inlet for flowing waste water blocked by the weir to the lower chamber;
An outlet for flowing waste water in the lower chamber to the second region;
The construction method of the contaminant capture facility characterized by having.

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