JP3091156U - Rainwater treatment equipment and simplified rainwater treatment equipment - Google Patents

Abstract

(57) [Abstract] (Modified) [Problem] Efficiently removes relatively small garbage and other contaminants contained in rainwater with a high pollution load in the early stages of rainy days, which flow from a combined sewer that flows sewage and rainwater. Provided is a rainwater treatment apparatus that can be removed and that can effectively prevent water pollution at a discharge destination. SOLUTION: Rainwater settling basins 1 to 5 and discharge pumps 11 to 15 are connected to a combined sewer 20 for flowing sewage and rainwater together, and rainwater flowing from the combined sewer 20 in rainy weather 8a is passed through a plurality of rainwater sedimentation basins 1 to 5 in parallel and processed to discharge the pump 11
A rainwater treatment apparatus 10 that discharges water from a plurality of stormwater basins 1 to 5, wherein a first stormwater basin 1 and an adjacent second stormwater basin 2 partition longitudinal walls separating each other. A filtration screen 40 is provided in the section 30 to treat rainwater 8a as a crossover flowing across the side wall 30 from the first stormwater basin 1 to the second stormwater basin 2 to treat impurities in the rainwater. I do.

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD The present invention relates to a rainwater treatment device and a simple type rainwater treatment device. Concerned. More specifically, the inflow is from a combined sewer system that mixes sewage and rainwater. Relatively small contained in rainwater with a large pollution load in the early rainy weather (light rain) Efficient removal (treatment) of foreign substances such as oil balls, toilet paper, and garbage. It is possible to prevent such foreign matters from flowing out to the public water area of the discharge destination, Rainwater treatment device and simple rainwater treatment system that can effectively prevent water pollution at the discharge destination Related to the processing equipment.

[0002]

2. Description of the Related Art In a combined sewer system that discharges sewage and rainwater together, Due to the small amount of water flowing in the drainage pipe, the flow velocity becomes slow, Pollutants are deposited on the surface. In the early rainy weather (also during light rain), this accumulated contaminant Since the quality will be washed away with a small amount of rainwater, pollutants will not be diluted by rainwater, The pollution load of the water flowing in the drainage pipe becomes large, and the contaminants that flow out to the public water area There was the problem of increasing the quantity of quality. Especially, relatively small oil balls and toys Contaminants such as waste paper and raw garbage are in the lateral direction of the rainwater sedimentation basin in the conventional rainwater treatment equipment. The vertical screen installed in the water flow into the public water area without being captured. Since it will be released, water pollution at the discharge destination has been a problem.

Currently, most of the big cities in our country have adopted the combined sewer system, and During the early hours (during light rain), especially pollutants containing relatively small contaminants The impact on the public waters of the discharge destination is enormous, and there is a global perspective on environmental protection. Also from the point of view, it is possible to effectively prevent the water quality of the discharge destination from being polluted by such contaminants. Has become an urgent national issue.

As one of the measures against this problem, a plurality of rainwater sand basins and drainage It is equipped with a pump and is connected to a combined sewer that drains sewage and rainwater together, Occasionally, rainwater is treated by passing it through multiple rainwater sand basins in parallel. A facility equipped with a rainwater treatment device that discharges it with a discharge pump (combining type (rainwater) At the pumping station), a storage facility will be set up in the early rainy weather, The turbidity load is also reduced. In addition, it is installed in the lateral direction of the rainwater sedimentation basin. The vertical width of the vertical screen is reduced from 50 mm to 25 mm and relatively small Attempts have also been made to remove things.

[0005]

[Problems to be Solved by the Invention] However, for the above-mentioned early rainy weather, Since measures to establish storage facilities require large amounts of storage, soil for storage facilities There was a problem that it was necessary to secure new land. In addition, the above-mentioned rainwater settling basin Measures to reduce the width of the vertical screen installed in the It is effective against foreign matters such as oil balls, toilet paper, and garbage that are smaller than 25 mm in length. There is a problem that it is extremely difficult to remove (treat) it efficiently and sufficiently.

The present invention has been made in view of the above-mentioned problems, and is directed to sewage and rain. Contamination at the beginning of rainy weather (during light rain) that flows in from the combined sewer that also flows water together Relatively small oil balls, toilet paper, garbage, etc. contained in rainwater with a large turbidity load It is possible to efficiently remove (treat) foreign substances, and such foreign substances are released to the discharge destination. To prevent water pollution and effectively prevent water pollution at the discharge destination. It is an object of the present invention to provide a rainwater treatment device and a simplified rainwater treatment device capable of achieving the following.

[0007]

Means for Solving the Problems The inventors of the present invention have been eager to achieve the above object. As a result of our research, we created a lateral flow of water in the rainwater sedimentation pond, Efficiently removes contaminants by passing through a filtration screen with a small mesh size and a large throughput By capturing and collecting contaminants efficiently in one place Therefore, it is possible to obtain a rainwater treatment device that can achieve the above object. Heading The present invention was completed. That is, the following rainwater treatment device and A simplified rainwater treatment device is provided.

[0008] [1] Equipped with a plurality of rainwater sedimentation basins and a pump for discharge, and combined sewage and rainwater flow It is connected to the combined sewer system, and when it rains, it flows in from the combined sewer system. The rainwater is treated by passing it through each of the rainwater sedimentation basins in parallel. Which is a rainwater treatment device that discharges the water with the discharge pump, Of which, one of the rainwater sand basins (first rainwater sand basin) and the first rainwater sand basin The adjacent second rainwater sedimentation basin captures contaminants on the longitudinal side wall that separates them from each other. And a filter screen for removing the first rainwater sediment A horizontal crossflow that flows from the pond toward the second rainwater sand basin across the side wall Rainwater treatment equipment capable of treating the foreign matter in the rainwater Place

With this configuration, sewage and rainwater are combined and flowed Rain with a large pollution load at the beginning of rainy weather (during light rain) that flows in from the combined sewer Efficiently removes relatively small oil balls, toilet paper, garbage, etc. contained in water It is possible to remove (treat) it, and such contaminants will flow to the public water area of the discharge destination. It is possible to prevent water pollution and effectively prevent water pollution at the discharge destination.

[0010] [2] The rain according to [1], wherein the filter screen has a mesh width of 3 to 7 mm. Water treatment equipment.

[0011] [3] The filtration screen scrapes off the captured contaminants and sends them to the downstream side. The rainwater treatment equipment according to the above [1] or [2], which comprises a scraping means for taking out. Place

[0012] [4] The scraping means is provided at a predetermined position on the downstream side of the first rainwater sedimentation basin. It is equipped with a vertical screen to capture and remove the contaminants sent out The rainwater treatment device according to the above [3].

[0013] [5] The rainwater is circulated in the first rainwater sedimentation basin near the vertical screen. The submersible pump is provided to circulate and enhance the effect of capturing the contaminants. ] The rainwater treatment device described in.

[0014] [6] To prevent the rainwater from flowing out to the downstream side of the submersible pump The rainwater treatment device according to the above [5], which is provided with a corner drop or a gate.

[0015] [7] Rainwater introduced from the rainwater sedimentation basin connected to the rainwater sedimentation basin during rainy weather A simple rainwater treatment device for treating and discharging wastewater, which comprises a rainwater treatment tank, a rainwater outflow tank, and a It is composed of a pump for discharging foreign matters and connects the rainwater treatment tank and the rainwater outflow tank to each other. Equipped with a filter screen to capture and remove foreign matter on the longitudinal side wall of the partition The rainwater crosses the side wall from the rainwater treatment tank toward the rainwater outflow tank. The foreign matter in the rainwater and the foreign matter in the rainwater. A simple type rainwater treatment device characterized by discharging by a pump for discharging foreign matters.

By configuring in this way, when there is no room on the site or rainwater Even if the number of settling basins is small, under the confluence type where sewage and rainwater are combined Included in water with a large pollution load in the early rainy days (during light rain) that flows in from the water supply Efficiently removes contaminants such as relatively small oil balls, toilet paper, and garbage. It is possible that such contaminants will flow into the public water area of the discharge destination. It is possible to effectively prevent water pollution at the discharge destination.

[0017] [8] The simplification according to [7], wherein the filter screen has a mesh width of 3 to 7 mm. Easy-type rainwater treatment device.

[0018] [9] The filtration screen scrapes off the captured contaminants and sends them to the downstream side. The simplified rainwater according to the above [7] or [8], which comprises a scraping means for discharging the rainwater. Processing equipment.

[0019] [10] The contaminant discharge pump is provided at a predetermined position on the downstream side of the rainwater treatment tank, Installed to capture and remove the contaminants sent by the scraping means. The simplified rainwater treatment device according to the above [9], which is a submersible pump with a crusher.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a rainwater treatment apparatus of the present invention will be described below with reference to the drawings. It will be specifically described with reference to FIG.

FIG. 1 is a schematic view showing a part of one embodiment of a rainwater treatment apparatus according to the present invention. FIG. 2 (a) is a perspective view schematically showing the entire rainwater treatment apparatus shown in FIG. 1. 2B is a cross-sectional view taken along line AA of FIG. 2A.

As shown in FIG. 1, FIG. 2A and FIG. 2B, The rainwater treatment device 10 includes a plurality of rainwater sand basins 1 to 5 and discharge pumps 11 to 15. Well, it is connected to the combined sewer system 20 that mixes sewage and rainwater, and when it rains, Rainwater 8a flowing in from the combined sewer 20 is arranged in a plurality of rainwater sand basins 1 to 5, respectively. Rainwater that is treated by passing in rows and discharged by the discharge pumps 11-15 The treatment device 10 is one rainwater sedimentation basin among the plurality of rainwater sedimentation basins 1 to 5 (first 1 rainwater sand basin 1) and a second rainwater sand basin 2 adjacent to the first rainwater sand basin 1 A filtration screen for trapping and removing impurities on the side wall portion 30 in the longitudinal direction that separates them from each other. The lean 40 is provided, and the flow of the rainwater 8a (indicated by a black arrow in the figure) is applied to the first rainwater sedimentation. A horizontal crossflow that flows from the pond 1 toward the second rainwater sand basin 2 across the side wall 30. It is characterized in that it can treat impurities in rainwater. Also the inflow gate In the vicinity of 21, 22, a vertical screen with a mesh width of 25 mm for capturing relatively large dust and the like. Lean 50 is installed.

As described above, in the present embodiment, a plurality of rainwater sand basins 1 to 5 are provided. Among them, one rainwater sedimentation basin (first rainwater sedimentation basin 1) is assumed to be a horizontal overflow sand basin By the way, a filter screen 40 with a small mesh width was installed on the side wall 30 (transverse overflow). By this, it is possible to efficiently remove relatively small impurities in rainwater. In particular , Effective for contaminants in rainwater when the pollution load is large in the early rainy weather (during light rain) Can be removed. In this case, the filter screen 40 is the first rainwater sedimentation basin. It is installed on the longitudinal side wall part 30 that separates the first and second rainwater sedimentation basins 2 from each other. Therefore (because it is a horizontal overflow type sand basin), it is possible to remove impurities efficiently. At the same time, a sufficient amount of rainwater treatment can be secured.

In addition, in the present embodiment, the uppermost stream as the first rainwater sedimentation basin Although the rainwater sand basin on the side was used, the rainwater sand basin on the downstream side was used as the first rainwater sand basin. Combine the rainwater sand basin adjacent to it with the first rainwater sand basin as the second rainwater sand basin You may let me.

The mesh size of the filter screen 40 used in this embodiment is The size can be appropriately selected according to the size of impurities, but is, for example, 3 to 7 mm. Is more preferable, and it is more preferable that it is 4 to 5 mm. 3m If it is less than m, the rainwater treatment amount may be insufficient, and if it exceeds 7 mm, the ratio Treatment of relatively small contaminants can be inadequate.

The filtration screen 40 used in the present embodiment is provided with the captured contaminants. It has a scraping means (not shown) for scraping the object and sending it to the downstream side. Therefore, the captured contaminants are sequentially sent out to the downstream side, collected in one place, and efficiently discharged. Can be excluded. There are no particular restrictions on such scraping means, but For example, the scraping blade inserted between the bar screens can be reciprocated to move the contaminants in one direction. An example of the device is as follows.

As a specific example of the filter screen 40 used in the present embodiment, , "Confluence Sewer Overflow (CSO) Countermeasures Filter Screen Facility Design Material -1 July, 998- "(the Sewerage New Technology Promotion Organization) You can

In the present embodiment, a scratch is provided at a predetermined location on the downstream side of the first rainwater sand basin 1. Grain width for efficiently capturing and removing foreign matter sent out by the scraping means Is equipped with a vertical screen 60 of 4 to 7 mm.

Further, in the present embodiment, the rainwater 8 a is provided near the vertical screen 60. Circulates in the first rainwater sedimentation basin 1 to guide contaminants to the downstream side, and The submersible pump 70 for raising a fruit is provided. The vertical screen 60 and Instead of the submersible pump 70, a contaminant discharge pump (a submersible pump with a crusher, which will be described later) ) 120 (see FIG. 3) may be used.

Further, in the present embodiment, the downstream side of the submersible pump 70 (exhaust pump 11 side), a corner drop or a gate 80 for preventing the rainwater 8a from flowing out. Is equipped with.

The rainwater treatment apparatus of the present invention has a single filtering capacity (processing capacity). It can be about 3 to 8 cubic meters per second per sand basin. In addition, of the present invention The rainwater treatment device may be a newly manufactured one, or the existing device is partially modified. It may be

Hereinafter, the operation method of the rainwater treatment apparatus of the present embodiment, in fine weather The explanation will be given separately in the early rainy weather (light rain) and heavy rain.

[0033] 1. Fine weather   Sewage 8b flowing from the combined sewer 20 is installed on the upstream side of the rainwater sand basins 1-5. After being subjected to a predetermined treatment in the sewage sedimentation basins 6 and 7, the discharge pump 16, It is pumped to the outside (ground) by 17 and sent to the sewage treatment plant.

[0034] 2. Early rainy time (during light rain)   The rainwater 8a flowing from the confluent sewer 20 along with the increase in water level due to rainfall Open the inflow gate 21 and lead it into the rainwater sand basin 1 Or, lower the gate 80 and close it. With the rise of the water level in the first rainwater sand basin 1 Start operation of the filter screen 40, the vertical screen 60, and the submersible pump 70. It The rainwater 8a from which the contaminants are removed by the filter screen 40 of the first rainwater sedimentation basin 1 is It flows into the second rainwater sand basin 2 as a transverse flow that flows across the side wall 30 and is discharged. It is pumped to the outside (ground) by any of the pumps 11 to 15. Increased inflow Although the water level of the first rainwater sedimentation basin 1 rises due to the addition, the second rainwater Open the inflow gate 22 of the sand basin 2 and the inflow gate 23 of the rainwater sand basin 3 etc. Operate the number of rainwater sedimentation basins according to the inflow.

[0035] 3. During heavy rain   In a facility (confluence (rainwater) pump station) where the rainwater treatment device of the present invention is installed Has the first mission to eliminate rainwater, and during heavy rain, all sand basins (rainwater basin and Open the inflow gate of the wastewater settling basin to remove rainwater. When there are few sand basins If the vertical screen 60 is a vertical type, it can be lifted during heavy rainfall to raise the flow of the sand basin. It is preferable to open the exit gate (not shown).

On the other hand, if there is no room on the site, or if the number of rainwater sedimentation basins is small, The rainwater treatment device described above cannot be installed due to restrictions on its shape. If it is not, the same pump is used to discharge the rainwater after pumping it from the existing rainwater sedimentation basin. It is possible to deal with this by installing a simple device having various functions on the ground. Main consideration The proposed simple rainwater treatment device is applicable to such a wide range.

An embodiment of a simplified rainwater treatment device of the present invention will be described below with reference to the drawings. A concrete explanation will be given while illuminating.

FIG. 3 is a schematic view showing an embodiment of a simplified rainwater treatment system according to the present invention. It is a perspective view shown in FIG.

As shown in FIG. 3, the simplified rainwater treatment device 100 of the present embodiment is , Rainwater sand basin (not shown) in case of rain (this rainwater sand basin is a conventional rainwater treatment device Rainwater sedimentation basin used in (conventional rainwater treatment equipment that has not been modified above), That is, it means the existing rainwater sand basin) and is introduced from the rainwater sand basin. Rainwater 108 (in FIG. 3, the rainwater 108 that has been treated in the existing rainwater sand basin, The case of introducing (pumping) via the discharge pump pipe 130 is processed) and discharged. A simple type rainwater treatment device 100 for discharging, which includes a rainwater treatment tank 111 and a rainwater outflow tank 11 2 and a foreign matter discharge pump 120, and a rainwater treatment tank 111 and a rainwater outflow. Impurities were captured and removed on the longitudinal side wall 113 that separates the tank 112 from each other. Equipped with a filter screen 140 for draining the rainwater 108 from the rainwater treatment tank 111 When it is passed as a transverse flow that flows across the side wall 113 toward the tank 112, In principle, the contaminants in the rainwater 108 are discharged by the contaminant discharge pump 120. Is characterized by.

The filter screen 140 used in this embodiment is shown in FIG. The same thing as what was used for the rainwater treatment apparatus shown in can be used. Ie , The mesh width is preferably in the range of 3 to 7 mm, and is preferably 4 to 5 mm. And are more preferable. Also, in order to scrape the captured foreign matter and send it to the downstream side It is preferable to include the scraping means (not shown). Its concrete As an example, the scraping blade inserted between the bar screens is reciprocally moved to remove impurities. An example is a device that moves the unidirectionally.

The contaminant discharge pump 120 used in the present embodiment is a rainwater treatment facility. Contaminants sent by the scraping means are placed at a predetermined location on the downstream side of the processing tank 111. A submersible pump with a crusher installed for capturing and removing is preferable. Well Also, behind the foreign matter discharge pump (submersible pump with crusher) 120, an enclosure 150 It is preferable to install the above in order to improve the efficiency of capturing foreign matters. Contaminants are impurities The foreign matter discharge pump (submersible pump with crusher) 120 is connected to the foreign matter discharge pump. It is sent to the sewage sedimentation basin via the output pipe 160. Meanwhile, the treated rainwater 108 Is discharged to the outside through the rainwater outflow tank 112 and the discharge pipe 161. In addition, Instead of the foreign matter discharge pump (submersible pump with crusher) 120, the vertical type scoop described above is used. The lean 60 and submersible pump 70 (see FIG. 1) may be used. Also shown in FIG. As described above, in the present embodiment, the straightening wall 1 for straightening the flow of the rainwater 108 is provided. 62 is installed. In addition, the enclosure 150 is made up of impurities collected in one place. In order to capture efficiently, the opening can be changed automatically by a timer etc. An adjustable gate 163 is provided.

The operation method will be described below. Combined sewage in case of rain Rainwater flowing in from the road reaches the discharge pump via the existing rainwater sand basin. The simple type rain of the present invention due to the rise of the water level at the place (pump well) where the discharge pump is installed. Operate the discharge pump connected to the water treatment device as the first rank, and in the early rainy weather (light rain) Foreign matter in the rainwater of ()) is removed. The simplified rainwater treatment device of the present invention has The discharge pumps that are not connected to the simple rainwater treatment system to obtain Operate according to the inflow in rainy weather.

[0043]

[Effects of the Invention] As described above, according to the present invention, wastewater and rainwater are combined. Large pollution load at the beginning of rainy weather (light rain) that flows in from the combined sewer system Contaminants such as relatively small oil balls, toilet paper, and garbage contained in rainwater It is possible to efficiently remove (treat), and such contaminants are used as public water at the discharge destination. It is possible to prevent water pollution to the area and effectively prevent water pollution at the discharge destination. A rainwater treatment device and a simplified rainwater treatment device can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a part of one embodiment of a rainwater treatment apparatus of the present invention.

2 (a) is a plan view schematically showing the entire rainwater treatment apparatus shown in FIG. 1, and FIG.
It is sectional drawing in the AA line of (a).

FIG. 3 is a perspective view schematically showing an embodiment of the simplified rainwater treatment device of the present invention.

[Explanation of symbols]

1 ... Rainwater sand basin (first rainwater sand basin), 2 ... Rainwater sand basin (second rainwater sand basin), 3-5 ... Rainwater sand basin, 6, 7 ...
Sewage sand basin, 8 ... Rainwater (sewage), 8a ... Rainwater, 8b ... Sewage, 10 ... Rainwater treatment device, 11-17 ... Discharge pump,
20 ... Combined sewer system, 21-25 ... Inflow gate, 30 ...
Side wall portion, 40 ... Filtration screen, 50 ... Vertical screen, 60 ... Vertical screen, 70 ... Submersible pump, 80 ...
Corner drop or gate, 100 ... Simple type rainwater treatment device, 1
08 ... Rainwater, 111 ... Rainwater treatment tank, 112 ... Rainwater outflow tank, 113 ... Side wall part, 120 ... Pump for discharging foreign matters (submersible pump with crusher), 130 ... Pump for discharging pump, 14
0 ... Filtration screen, 150 ... Enclosure, 160 ... Contaminant discharge pipe, 161, Discharge pipe, 162 ... Straightening wall, 16
3 ... Adjustment gate.

Claims (10)

[Scope of utility model registration request] 1. A rainwater sedimentation basin and a discharge pump are provided, and the rainwater flowing from the merged sewer system is connected to a combined sewer system that discharges sewage and rainwater together. A rainwater treatment device which processes the wastewater by passing through the sand basins in parallel and discharges it by the discharge pump, wherein one of the plurality of rainwater sand basins (the first rainwater basin ) And a second stormwater sedimentation basin adjacent to the first stormwater sedimentation basin is provided with a filtering screen for trapping and removing impurities on the longitudinal side wall partitioning each other, A rainwater treatment device capable of treating the contaminants in the rainwater as a transverse flow that flows across the sidewall from the first rainwater sedimentation basin toward the second rainwater sedimentation basin. . 2. The mesh width of the filter screen is 3 to 7 m.
The rainwater treatment apparatus according to claim 1, wherein m is m. 3. The rainwater treatment apparatus according to claim 1, wherein the filter screen includes a scraping unit for scraping the captured contaminants and sending the contaminants to the downstream side. 4. The vertical screen for catching and removing the contaminants sent by the scraping means is provided at a predetermined position on the downstream side of the first rainwater sedimentation basin. Rainwater treatment equipment. 5. A submersible pump for circulating the rainwater in the first rainwater sedimentation basin to enhance the trapping effect of the contaminants in the vicinity of the vertical screen.
Rainwater treatment device described in. 6. The rainwater treatment apparatus according to claim 5, further comprising a corner drop or a gate on the downstream side of the submersible pump for preventing the rainwater from flowing out. 7. A simple rainwater treatment device which is connected to a rainwater sedimentation basin during rainy weather to treat and discharge the rainwater introduced from the rainwater sedimentation basin, which comprises a rainwater treatment tank, a rainwater outflow tank, and a contaminant discharge. A rainwater treatment tank and a rainwater outflow tank, and a filtering screen for capturing and removing foreign matter from the side wall portion in the longitudinal direction that separates the rainwater outflow tank from the rainwater treatment tank. A simplified rainwater treatment apparatus, characterized in that the contaminants in the rainwater are discharged by the contaminant discharge pump while being passed as a transverse flow that flows toward the rainwater outflow tank across the side wall. 8. The mesh width of the filter screen is 3 to 7 m.
The simple rainwater treatment device according to claim 7, wherein m is m. 9. The simplified rainwater treatment device according to claim 7, wherein the filter screen includes a scraping unit for scraping the captured contaminants and sending the contaminants to the downstream side. 10. The water with a crusher, wherein the contaminant discharge pump is installed at a predetermined position on the downstream side of the rainwater treatment tank to capture and remove the contaminants sent by the scraping means. The simplified rainwater treatment device according to claim 9, which is a pump.