JP2005350867A - Rainwater utilization system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize rainwater falling on a park, a schoolyard, or the like heretofore discharged wastefully and to reduce the occurrence of submersion and flood of land. <P>SOLUTION: A part of rainwater collected in a final water storage tank 4 via respective primary storage layers 2a-2c is directly led into a purifying device 10 for purifying treatment via a primary water extraction pipe 6 or a secondary water extraction pipe 7 and a filter 9 and utilized as sprinkling and toilet water. Alternatively, the rainwater is once stored in a large-sized water storage tank 11, and the stored water is extracted and suitably purified in the purifying device 10 for use. Further, the rainwater is purified beforehand in the purifying device 10, and the purified water is stored in the water storage tank 11 of large capacity and utilized as water for living in case of a disaster or the like or utilized as potable water through an advanced sterilization treatment. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system that uses rainwater, and more particularly, to a system that collects and uses rainwater from a rainwater pipe that collects rainwater and flows it to a river or the sea, or from a route that leads to this rainwater pipe.

  Recently, resource saving is strongly desired in various fields, and effective use of rainwater is also strongly desired as part of it. Conventionally, the water used in daily life has been used for cooking, bathing, garden sprinkling, car washing, toilets, etc.

Of these, for example, water used in car washing, watering, and toilets need not be clean water used as drinking water. The use of clean water for such purposes should be avoided as much as possible in the future. From such a point of view, many middle water systems mainly using rainwater have been proposed, and some have been put into practical use. The following patent documents relate to such rainwater utilization technology.
JP 2004-150056 JP-A-2004-041969 JP 2003-166264 A JP 2003-113625 A JP 2001-047030 A JP 2001-011906 A JP 2000-233193 A

The technologies described in the above patent documents have unique effects in terms of effective use of rainwater, and are expected to be put to practical use in the future.
However, any invention makes effective use of rain that falls within a specific establishment or private house, or these premises, and only uses the rain that falls within the premises in a self-contained manner. It is.

  However, it is not necessary to limit the target rainwater to rainwater that falls in such a narrow range if rainwater usage is considered broader. If rainwater that falls on a large land such as a park is used, a larger amount of rainwater is used. It is possible to reduce the occurrence of flooding and flooding in these areas. For example, at present, almost 100% of the rain that falls on a vast area such as a park, a school yard, or a road is discharged to a river or the sea without any use.

In addition, we know well that roads and land are often flooded when heavy rain falls over the drainage capacity of these drainage channels.
In addition, the conventional rainwater utilization system is a person who manages and owns rainwater that falls within the area owned by him / herself, such as an individual's home or factory, as described above (the household or company that owns the land). As a result, the rainwater purification system cannot naturally use more water for the total precipitation in this area, and it is not always in demand. Due to these restrictions, large-scale rainwater treatment could not be performed.

  As mentioned above, at present, most of the rainwater is wasted into rivers and seas. Especially in the city center, most of the surface of the ground is paved with concrete and asphalt, so the ground has almost lost its water absorption capacity. The fact is that they are released into rivers and the sea without being released.

The present invention is configured to solve the above-described problems.
That is, the present invention is an invention configured to effectively use a part of rainwater discharged into a river or sea as middle water (can be used as drinking water if sterilization is sufficiently performed). A route for extracting rainwater from the rainwater pipe, etc. to the discharge route such as a rainwater pipe, or a route for extracting rainwater directly to this discharge route, and purifying the rainwater for the route for extracting this rainwater By installing one or more rainwater purification devices to be used, it is an effective use system of rainwater that is configured to effectively use rainwater that was originally discharged wastefully.

  According to the present invention, it is possible to effectively use rainwater that has fallen in a large area such as a park, and it is possible to install a large-capacity device that purifies a large amount of rainwater. While it is intended for self-contained use by certain persons, it is possible to use rainwater more widely.

  Further, by storing and using a large amount of rainwater, it becomes possible to reduce the occurrence of flooding or flooding by the amount of use.

  For rainwater pipelines that discharge rainwater to rivers and seas, to channels that guide rainwater that falls on large sites such as parks and schoolyards, or pipes that extract rainwater directly to this drainage rainwater pipeline Provide one or more rainwater purification devices for this pipe line to purify and use the extracted rainwater.

1 to 3 show a first embodiment of the present invention.
First, the treatment of rainwater that falls on a large site such as a park (which will be described below using a park “indicated by symbol P” as an example) is performed by the following configuration.
That is, in FIG.1 and FIG.3, the rain which fell in the park P flows into the side groove part installed in the park P, such as 1a, 1b, 1c ... (refer FIG. 3), and these rainwater is the side groove 1a, From 1b and 1c, a primary storage tank (sometimes called "primary dredger" etc.) 2 (see Fig. 1), 2a, 2b and 2c (see Fig. 3) for temporarily storing and discharging rainwater, A large final reservoir that collects rainwater from each primary reservoir 2 and temporarily stores it through a path 3 (see FIG. 1), 3a, 3b, 3c (see FIG. 3) and discharges the rainwater pipeline ( 4) and is discharged from here into a large water discharge pipe 5 which is a public water discharge route and discharged into a river or the sea.

  Since this drainage pipe 5 collects rainwater from various places and discharges it to rivers and the sea, it is configured as a large-capacity large-sized pipe and a long pipe must be constructed. Formed below.

  In the present embodiment, rainwater that has fallen in the park P is extracted from the middle of the route to the water discharge pipe 5 and is subjected to purification treatment. More specifically, rainwater is extracted from the final water tank 4. It is configured as follows. Incidentally, depending on the configuration of the rainwater discharge path, there is a case where one or more intermediate storage tanks are installed between the primary storage tank 2 and the final storage tank 4. Part or all may be configured to be extracted from these intermediate stage storage tanks.

  In FIG. 2, rainwater W from each primary reservoir 2 (2a, 2b...) Gathers in the final reservoir 4 via pipes 3 (3a, 3b...) And is connected to the final reservoir 4. It is discharged to the water discharge pipe 5 through the discharge pipe 8. In this case, when the amount of rainwater flowing into the final water storage tank 4 is an amount commensurate with the water discharge capacity of the discharge pipe 8, the storage surface of the rainwater in the final water storage tank 4 is almost equal to the installation height of the water discharge pipe 8. L1 is maintained. On the other hand, when the amount of inflow exceeds the water discharge capacity of the discharge pipe 8, the water surface of the final water storage tank 4 rises and eventually overflows from the final water storage tank 4.

  The primary water extraction pipe 6 is connected to the final water tank 4 at the position below the water surface L1 with respect to the final water tank 4 having such a configuration. Further, a secondary drain pipe 7 connected to the final water storage tank 4 is provided at a position higher than the primary water drain pipe 6, and this rise occurs when the water level in the final water tank 4 rises for the above reason. It is configured to extract the rainwater thus obtained by the secondary extraction pipe 7. Reference numeral L2 in the figure indicates a water surface on which the secondary extraction pipe 7 can extract water. Reference numerals 6 a and 7 a are valves provided in the water extraction pipes 6 and 7.

  Reference numeral 9 denotes a filter (see FIG. 3) connected to the primary extraction pipe 6 and the secondary extraction pipe 7. Reference numeral 10 denotes a water purifier that purifies rainwater into usable water such as middle water. In addition, although the technology as described in the above-mentioned patent document is proposed as this purification treatment device, in particular, if the rainwater storage device (Japanese Patent Application No. 2001-213177) previously proposed by the inventors of the present application is used, By setting the capacity of the storage tank large, the purification device itself can be used as a large-capacity water storage tank.

  Reference numeral 11 denotes a water storage tank having a larger capacity. For example, the water storage capacity has a large capacity of several tens of tons or several hundreds of tons. As will be described later, the large-capacity water storage tank 11 can be configured as a water storage tank that directly stores rainwater, and can also be configured as a water storage tank that stores treated water purified by a purification device.

  Next, reference numerals 12a, 12b, 12c, 12d, 12e, and 12f are pipes that allow rainwater or treated water that has been purified to pass through. More specifically, it is as follows.

  For example, when the amount of rainfall is small and the extracted rainwater is directly purified by a purification device, the pipe 6 is opened, the pipe 7 is closed, and the pipes 12a, 12c, 12d and 12e are closed, and the pipe 12a is closed. The rainwater that has passed through the filter 9 is directly introduced into the purifier 10 and the purified treated water is used as water for spraying water, toilet water, etc. for trees in the park through the pipe 12f.

  Next, when there is a risk that the final water tank 4 overflows, both the pipes 6 and 7 are opened, and the pipe 12b is opened to introduce a large amount of rainwater into the large-capacity water tank 11 (as a primary water tank). Use). In this case, it is also possible to perform the rainwater purification process in the purification device 10 simultaneously with the introduction of the rainwater to the large-capacity water storage tank 11 by keeping the pipe line 12a open. In this way, a large amount of rainwater is stored in the large-capacity water tank 11. The rainwater in the large-capacity water storage tank 11 is extracted later (used later) and used as it is, or the pipe 12c is opened (12d is closed) and introduced into the purification device 19, and the treated water purified by the purification device 10 is used. As described above, it is used via the pipe line 12f.

  On the other hand, the large-capacity water storage tank 11 can be used as a treated water storage tank (utilization as a secondary water storage tank). That is, the pipes 12b, 12c and 12f are closed, 12a and 12d are opened, and rainwater from the filter 9 is directly introduced into the purification device 10 for purification treatment. Store in. In this way, this large-capacity water storage tank can be stored as drinking water with high utility value or as a drinking water if it is sterilized to a higher degree, and can be used as drinking water especially in the event of a disaster. . Incidentally, if the device proposed by the inventors of the present application is used, it becomes possible to obtain potable water.

FIG. 4 shows a second embodiment of the present invention.
In this embodiment, a shortage of rainwater to be purified used in an individual home is supplemented with rainwater discharged into the sea or the like.

  Reference numeral 13 in the figure denotes a common water tank, which is configured to supply rainwater to each purification device used in each household or factory. Reference numerals 14A, 14B, 14C, and 14D are purification devices individually managed and owned by a specific owner such as a home or a factory.

Each purification apparatus 10A thru | or 10D is connected by the pipe line 15, and it is comprised so that the rain water W1 currently stored by the joint water tank 13 may be supplied. The common water tank 13 is connected to the water discharge pipe 5 by a pipe line 16, and rainwater W <b> 1 flowing through the water discharge pipe 5 can be appropriately extracted through the pipe line 16. In this embodiment, the large-capacity water storage tank 11 of the above-described embodiment can be configured to function as the common water storage tank 13, and the final water storage is performed with respect to the large-capacity water storage tank 11 in the first embodiment. It is possible to extract rainwater directly from the water discharge pipe 5 without passing through the tank 4.

Reference numeral 19 denotes a water level sensor disposed in the joint water tank 13, and when the water level in the joint water tank 13 is L2 or more by detecting the water by the sensor 19b, the water purifiers 14A to 14D are shared. Rain water in the water storage tank 13 is configured to be able to be supplied. On the other hand, when the sensor 19a detects water and the water level in the joint water storage tank 13 exceeds L1, the valve 16a of the pipe line 16 is closed and the rain water from the discharge pipe 5 is closed. Stop extracting.

  Next, an example of a rainwater supply state in the case where the amount of rainwater in the joint water tank 13 is an amount capable of supplying rainwater to each of the purifiers 14A to 14D will be described. That is, rainwater W2 due to rainfall in its own site flows into each purification device 14A to 14D. For this reason, each purification apparatus 14A thru | or 14D replenishes the shortage of this rainwater W2 with the rainwater W1 from the joint water tank 13. FIG.

  That is, when the water level signals of the water level sensors 17a to 17d installed in the respective purifiers 14A to 14D do not indicate the full water level and the water level sensor of the common water tank 13 indicates the water level L2 or more, the signals of both water level sensors The valve control devices 18a to 18d open the valves 15a to 15d and supply the rainwater W1 in the joint water tank 13 to the respective purification devices 14A to 14D as supplementary water.

  Next, when any of the water level sensors 17a to 17b on the purification devices 14A to 14D generates a full signal, each valve control device 18a to 18d closes the predetermined valves 15a to 15d and stops replenishment of rainwater. Conversely, each water level sensor 17a to 17b does not output a full water signal, but when the water level sensor 14 in the joint water tank 13 receives a signal indicating that the water level is less than L2, each valve control device 18a to 18d closes the valves 15a to 15d regardless of the presence or absence of a full signal from the water level sensors 17a to 17b.

  As described above, in this embodiment, the capacity of the purification device in each household is not the one corresponding to the water usage fee in the household, but the amount of rainfall in the household site, that is, the amount of rainwater that can be acquired in the site However, according to this configuration, a purifier with a capacity suitable for the purpose is installed by replenishing rainwater from the joint water tank. It becomes possible to do. In addition, by increasing the capacity of purification devices that are used in a self-contained manner for conventional home use and factory use, a part of the treated water of the purification device of each home or factory can be used by third parties in the event of a disaster It is also possible to make the purification device more public, such as water.

  Since the configuration of the present invention uses rainwater that has conventionally been discarded in large quantities and wastefully, it is possible to increase the size of the purification device (capacity increase). It becomes possible to supply a large amount of potable water by using various kinds of washing processes that use medium water, washing water that can be used for car washing at a gas station or a bus terminal, or by strengthening sterilization.

It is sectional drawing which shows the rainwater treatment path | route of the park which is the implementation object of this invention. FIG. 2 is a cross-sectional view of the final water storage tank showing details of the final water storage tank shown in FIG. 1. It is a path | route top view which shows the state which installed the processing system of this invention with respect to the rainwater processing path | route of the park shown in FIG. It is a systematic diagram of rainwater treatment showing another embodiment of the present invention.

Explanation of symbols

1 (1a, 1b, 1c) Side groove 2 (2a, 2b, 2c) Primary reservoir 3 (3a, 3b, 3c) Pipe line 4 Final water tank 5 Drain pipe 6 Primary drain pipe 7 Secondary drain pipe 8 Drain pipe pipe 9 Filter 10 Purification device 11 Large-capacity water storage tank 13 Joint water storage tank 14A, 14B, 14C, 14D Purification device (individual installation type)
15 Pipe lines 17a, 17b, 17c, 17d Water level sensor (for individual installation purification device)
19 Water level sensor (for joint water tank)

Claims (7)

A system that purifies and uses rainwater, collects rainwater that falls in a wide area such as a park, and extracts rainwater from the drainage route that is configured to discharge this rainwater into a water discharge channel such as a water discharge pipe. It is characterized in that at least a part of the rainwater to be discharged is introduced into the purification device for purification by installing a purification device for purifying rainwater with respect to this rainwater extraction route. Rainwater usage system. The drainage pipe is connected to a final water storage tank that discharges the collected rainwater to the drainage pipe, and one or more purification devices are connected to the drainage pipe via a filter. Rainwater utilization system. The final water storage tank is connected to a discharge pipe for discharging rainwater from the final water storage tank to the discharge pipe side, and a drain pipe is connected to the final water storage tank at a position lower than the installation height of the discharge pipe. The rainwater utilization system according to claim 2, wherein all or part of the rainwater to be discharged from the discharge pipe is supplied to the purification device. 4. The rainwater utilization system according to claim 3, wherein a second extraction pipe for preventing overflow of the final water storage tank is connected at a position higher than a connection position of the discharge pipe of the final water storage tank. A large-capacity water tank is provided between the purification device and the final water tank, or between the purification device and the discharge pipe, and this large-capacity water tank is used as a primary water tank for storing rainwater or by a purification device. The rainwater utilization system according to any one of claims 2 to 4, wherein the rainwater utilization system is configured to be used as a secondary water tank for storing purified treated water. The extraction pipe for supplying extracted rainwater to the purification device is directly connected to a water discharge pipe for discharging the collected rainwater, and is configured to extract rainwater from the water discharge pipe. The rainwater usage system described. A common water storage tank for storing the extracted rainwater is provided, and the purification device for storing the rain in the section where the individual purification device is installed individually in each household, etc., is connected to this common water storage tank. The rainwater utilization system according to claim 1 or 6, wherein a shortage of rainwater in the individual purifiers is obtained from the common water tank.

Images