JP2019127780A - Rainwater utilization system - Google Patents

Abstract

To provide a system that allows rainwater to used in emergencies as well as to be stored, managed and stably maintained.SOLUTION: There is provided a rainwater utilization system 1 comprising: a filter 6 for removing rainwater debris; tanks 2 and 3 for receiving and storing rainwater treated by the filter 6; a pump 18 for pumping and transferring the water from the tanks 2 and 3; purification paths 19A and 19B for transferring the water transferred by the pump 18; and a purification device 14 for purifying the water. The rainwater utilization system further comprises: a transfer path 15 for transferring the treated water treated by the purification device 14 to the tank 2 and a lead-out path 21 for leading the water transferred by the pump 18 out of the tank 3.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a rainwater utilization system and the like.

  BACKGROUND ART Conventionally, technology development has been carried out in which rainwater is stored and used for water sprinkling, toilets, water for car wash, washing, baths and the like (see, for example, Patent Documents 1 to 10). These techniques relate to a tank for simply storing rainwater, a method and apparatus for removing dirty initial rainwater, a method and apparatus for sterilizing rainwater, a method and apparatus for purifying rainwater, and the like.

Unexamined-Japanese-Patent No. 2000-233193 Japanese Patent Application Laid-Open No. 2001-059233 Japanese Patent Application Laid-Open No. 2002-167813 JP 2004-308382 A JP 2005-313134 A JP 2005-350867 A JP, 2011-131201, A JP, 2016-094761, A JP, 2016-108861, A Utility model No. 3037261

However, with regard to the above-mentioned technology, it can not be said that a device for storing and managing rainwater and using it at the time of an emergency such as a disaster is not sufficiently made, and there is room for further improvement.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a system that can be used in an emergency while storing and managing rainwater and maintaining it stably.

The present inventor has come up with a system that circulates and purifies rainwater with a filter medium or the like rather than simply storing and reusing rainwater, and has basically completed the present invention.
Thus, the system for utilizing rainwater according to the invention for achieving the above object comprises a filter for removing rainwater debris, a tank for receiving and storing rainwater treated by the filter, and a pump for pumping out and transferring the water of the tank And a purification path for sending the water sent by the pump and a purification device for purifying the water passing through the purification path, wherein the treated water treated by the purification device is supplied to the tank. And a lead-out path for leading the water transported by the pump outward from the tank.

In the above invention, one tank may be provided, or two or more tanks may be provided. In addition, the two tanks provided are a first tank that receives rainwater and treated water, and an amount of water that has overflowed when the water stored in the first tank exceeds a predetermined minimum storage amount. Preferably, a second tank is provided for storing the water, and the purification device is configured to treat water from the second tank. Also, at this time, the first tank has a sediment outlet port for discharging waste deposited at the lowermost portion outward, and above the sediment outlet port, which is greater than the minimum storage amount It is preferable that a rainwater outlet for draining water to the second tank is provided. Further, at this time, the water stored in the first tank can be discharged outward to the first tank at an intermediate position between the precipitate outlet and the rainwater outlet, even during a power failure. Preferably, an emergency exit line is provided.
Further, in the above invention, the purification device is provided with two types of purifiers, a high-speed purifier that processes water at a higher speed and a low-speed purifier that processes water at a lower speed. Preferably, the vessel is provided with a filter medium for attaching microorganisms, and the low-speed purifier is provided with a filter medium for attaching organic matter. As the filter medium, PVA, activated carbon, ultrafiltration membrane, ceramics, foam glass, non-woven fabric and the like can be used.

In the above invention, preferably, only one pump is provided and used for both the transfer to the purification device and the discharge of water outward. In this way, the configuration of the entire system can be simplified as compared to the case where two or more pumps are used. At this time, it is preferable that a timer for setting a timing for transferring water to the purification device by the pump and a solenoid valve for opening and closing the purification path by the timer are provided. In this way, water can be transferred from the tank to the purifier after an appropriate amount of time without manual intervention.
A plurality of pumps may be provided.
In the above-described invention, a storage water sensor that detects the amount of stored water in the tank, a transfer water amount detection sensor that detects the amount of water in the transfer path, and a derived amount detection that detects the amount of water derived outward in the lead-out path. Sensors are provided respectively, and this rainwater utilization system is provided with a receiver capable of receiving signals from each of the sensors at a remote place away from the place where the system is provided. preferable.
With such a configuration, the amount of water stored in the tank and the amount of circulation can be monitored at a remote location.

In the rainwater utilization method according to another aspect of the invention, a tank storage process leading to a storage tank after removing the rainwater debris collected in the weir, the water stored in the tank is pumped to the purification device by a pump Cleaning process for purification treatment, second tank storage process for introducing purified water to the tank, stored water use process for drawing out the water stored in the tank to the outside if necessary and using it It is characterized by having.
In this way, the rainwater stored in the tank is stored again in the tank after being treated by the purification device. As described above, the rainwater is not merely stored, but is purified many times during storage, so that the rainwater can be maintained at a quality that can be used as household water for a long period of time.
In addition, it is preferable that the storage water of a tank hold | maintains the quantity of about 30%-50% with respect to the largest quantity which can be stored.

In the said invention, it is preferable that the said purification process implements stored water 2 rotations or more a day at least. According to the study of the present inventor, in order to maintain rainwater at a predetermined water quality, it is sufficient to carry out the purification process at a rate of at least 2 rotations or more (preferably, about 3 or 4 rotations) per day. all right. Therefore, by treating as described above, it is possible to maintain the properties of the stored rainwater in a more preferable state for a long time. At this time, it is preferable to carry out the purification process so that the stored water can be purified at least once per day. By doing so, the quality of the stored water can be maintained above a certain level over a long period of time. Note that the pump may be operated constantly or intermittently.
Further, in the above invention, the tank may be a first tank used in the tank storage process and the second tank storage process, and water overflowed from a predetermined height position in the first tank may be transported. It is preferable that the second tank is provided separately from the pump.

In this way, in the first tank, the rainwater introduced from the weir sinks into the lower layer a substance of an appropriate size, and the cleaner water in the upper layer is sent to the second tank. Water is pumped from the second tank to the purification device and then reintroduced into the first tank. At this time, in the first tank, the water in the upper layer is sent to the second tank after being appropriately stirred by the inflow of rainwater and the inflow from the purification device. In this way, purification treatment is performed while appropriately stirring the entire water. In the stored water use process, the water in the second tank is used.
Further, in the above invention, the purification device is provided with two types of purifiers, a high-speed purifier that processes water at a higher speed and a low-speed purifier that processes water at a lower speed. It is preferable that an aerobic microorganism is purified in the vessel, and an organic substance is purified in the low-speed purifier. At this time, the ratio of the flow velocity of water to the low speed purifier to the flow velocity of water to the high speed purifier is preferably set in the range of 1: 5 to 10.

If it does in this way, the removal rate of the suspended | floating matter in rainwater can be raised efficiently.
In the above invention, a detection step of detecting the stored water amount of the tank, the liquid transfer amount of water when the second tank storage step is performed, and the usage amount of water when the stored water use step is performed And a transmission step for transmitting the detected data to a remote location.
In this way, it is possible to remotely grasp and manage the amount of stored rainwater and the amount of circulation thereof.
In the above invention, only one pump may be provided and used for both the purification process and the stored water use process, or a plurality of pumps may be provided and dedicated for implementation of each process. However, the overall configuration can be simplified by providing only one unit. Moreover, when it is set as only one pump, water supply when implementing a purification process can be implemented only for a predetermined time using a timer and a solenoid valve.

Thus, according to the present invention, it is possible to provide a system that can be used in an emergency while storing and managing rainwater and maintaining it stably.
In addition, the following effects can be obtained.
(1) Rainwater can be stored and used for daily use, agricultural water, car wash water, etc. for a long period of time. At this time, use the water from the tank as it is when using it for watering plants or washing the toilet, and use it as water for car wash of a car or household water such as shower, bath, hand wash etc. high-performance filter Can be used through.
(2) By providing each sensor, it is possible to remotely monitor the amount of stored water in the tank, the amount of water circulating between the tank and the purification device, and the amount of water drawn out and used, thus a system that is easy to use .

It is a graph which shows the amount of stored water in each tank in which experiment 1 and experiment 2 are implemented. It is a graph which shows the chromaticity (A) and turbidity (B) of the stored water in each tank at the time of completion | finish of experiment 1. FIG. It is the photography figure which copied the state (A. tank 1, B. tank 2, C. tank 3) in each tank on the 13th day from the test start. It is a photograph figure of a real machine at the time of evaluating a rainwater utilization system of this embodiment. It is a schematic diagram showing the whole composition of a rainwater utilization system. It is a figure which shows the internal structure of a purification apparatus. It is a figure explaining the course of the water in a rainwater utilization system. It is a flowchart which shows the motion of the rainwater in a 1st tank and a 2nd tank. It is a flowchart which shows the operation | movement outline when driving a pump with a timer. It is a flowchart which shows the operation | movement outline | summary when deducting water outward. It is a flowchart which shows transmission / reception of the signal between a rainwater utilization system and a remote place.

Next, the embodiments of the present invention will be described with reference to the drawings, but the technical scope of the present invention is not limited by these embodiments, and various embodiments are possible without changing the gist of the invention. Can be implemented.
<Test example>
In order to evaluate the rainwater utilization system of this embodiment, storage conditions of rainwater were changed, and storage performance of rainwater by each method was evaluated by a field test.
1. Test method About rainwater which fell on roof (approximately 50 square meters) of company to which inventor belongs, we collect thing which flowed through weir and collect 3 tanks (φ 760mm × H 1240mm cylindrical shape (capacity approximately 500L) , SUS304) and stored separately.

(1) Experiment 1
After the rainwater was stored in the raw water tank, it was divided into equal amounts in tanks 1 to 3 and stored. This was stored for 7 days by the following method.
Tank 1: Retained rainwater.
Tank 2: Circulated using a pump. As a pump, Eheim landing 1250 28 W, 10 L / min-1.25 m was used.
Tank 3: A purifier (purifier) was used in the middle of the circulation path while circulating using a pump. As a pump, Eheim landing 1250 28 W, 10 L / min-1.25 m was used. Moreover, Eyheim 2210 was used as a purification apparatus. There are two types of purifiers used in the purification device: a high-speed purifier (capacity 1L x 2) that processes water at a higher speed and a low-speed purifier (capacity 1L x 1) that processes water at a lower speed. A purifier was installed. Among these, a filter medium for attaching microorganisms was used for the high-speed purifier, and a filter medium for attaching organic substances was used for the low-speed purifier. In addition, the ratio of the flow velocity to the low speed purifier and the flow velocity to the high speed purifier was in the range of 1: 5 to 10.
Two hundred days of rain water (about 500 L) dropped two days before the start date of the experiment was distributed to tank 1 and to 200 L each to tank 2 and tank 3 (each tank was kept stored). Rainwater (approximately 880 L) dropped on the day of the start of the experiment was distributed and added to Tank 1 in 360 L, Tank 2 and Tank 3 in 260 L each. Thus, after storing about 460 L of rainwater in each tank, the experiment was started.
Experiment 1 was completed on the 7th day.

(2) Experiment 2
After Experiment 1 ended, Experiment 2 using Tank 1 to Tank 3 was carried out. In consideration of actual rainwater use, about 70 liters of stored water was extracted every day (however, it was closed on Saturdays, Sundays, and holidays). When it rained during the experiment period, rain water was evenly added to and stored in tank 1 to tank 3. Specifically, about 170 liters of rain water on the 12th day from the start of Experiment 1, about 170 liters of rainwater on the 15th day, about 45 liters of rainwater on the 19th day, and about 100 liters on the 20th day The rain water of about 170 L was added to each tank on the 25th day.
When the tank became empty, it was set as the condition to stop the withdrawal of the stored water (however, in fact, it did not empty because the next rain fell before the tank was empty).
(3) Regarding the rainwater stored in each tank in experiments 1 and 2, pH, chromaticity, turbidity, general bacteria, E. coli, nitrite state on day 7, day 13, day 13 and day 20 of test start Nitrogen, nitrite nitrogen and nitrate nitrogen, chloride ion, organic matter (TOC), odor and residual chlorine were measured.
In addition, during the experiment period, the inside of each tank (solid matter accumulation, wall surface state) and the state of the filter medium (color, sludge) were visually observed and photographed.

2. Test results The test was conducted from September 8 to October 5. The average temperature of the rainwater was 28 ° C to 30 ° C. The transition of the amount of water stored in each tank from the start of the test is shown in FIG.
(1) Results of Experiment 1 The results of analysis before the start of the test and on the seventh day are shown in Table 1, and changes in chromaticity and turbidity are shown in FIG.

As for general bacteria at the start of the test, tank 1 was 1/10 or less the data of tank 2 and tank 3. This is considered to be because the date and time of rainwater used at the start of tank 1 and tanks 2 and 3 were partially different. It was considered that general bacteria were scarce because the rain that fell on the day of the trial was heavy rain.
As shown in FIG. 2, in the tank 3, the chromaticity and the turbidity were much smaller than those in the other tanks, and it is understood that the effect of using the purification device (two types of purifiers) is large. It was.
(2) Results of Experiment 2 The analysis results on days 7, 13, and 20 from the start of the test are shown in Table 2.

At the test time, relatively large amounts of precipitation were found, and the rainwater was not so polluted, so there was no significant difference in the tanks 1 to 3 and both the chromaticity and turbidity were within the water supply standard value range. . However, the water quality of the tank 3 was the best in terms of the number of general bacteria, chromaticity and turbidity.
When the condition of the inside of the tank was observed on the 13th day from the start of the test, the tank 1 was clearly less transparent, and the tank 3 was clearer and clearer than the stagnant (see FIG. 3) ). Also, tanks 2 and 3 felt stronger in odor than tank 1. This was thought to be due to the odor diffusing into the tank when the water circulating at the pump falls to the water surface.
As described above, it was found that when water stored in rain water is circulated by a pump using a purification device, the water quality can be maintained favorably.

<Configuration of rainwater utilization system>
Next, the configuration of the rainwater utilization system 1 (hereinafter simply referred to as “system 1”) of the present embodiment will be described with reference to FIGS. FIG. 4 is a photographic view showing the actual system (pre-type) installed under the roof.
The system 1 of this embodiment corresponds to rainwater falling on the roof 4 having an area of about 100 square meters to 500 square meters. The system 1 is provided with two tanks 2 and 3. Among these, in the first tank 2 shown on the right side of FIG. 5, the rainwater falling on the roof 4 flows through the weir 5. In addition, the overflowed stored water 8 moves to the second tank 3 on the left side of the drawing when a predetermined amount or more of rainwater has accumulated in the first tank 2.
Each tank 2, 3 has the same size, and the maximum capacity is about 5 tons each. In the first tank 2, a filter 6 for removing rainwater dust is provided where rainwater from the basket 5 flows. The filter 6 removes large dust (such as dead leaves accumulated in the basket 5), and can be made of stainless steel or plastic with a square mesh of about several millimeters.

At the lowermost part of the first tank 2, there is provided a sediment outlet 10 for leading the settled dust outward. The precipitate outlet 10 is normally closed and is opened after an appropriate period (about 6 months to 2 years) to discharge dust. The stored water 8 is removed at an intermediate position above the sediment outlet 10 and below the position of the rainwater outlet channel 7 (in the present embodiment, the position where the stored water 8 is about 2 tons). An emergency derivation line 11 is provided which can be derived. This emergency lead-out line 11 can be opened and closed manually even in the event of a power failure, and the water is led out by the pressure of the stored water 8.
Further, at the lower end of the first tank 2, a stored water sensor 12 for detecting the amount of stored water 8 is provided. The water storage sensor 12 is connected to the computer 13.
Further, in the vicinity of the upper end of the first tank 2, a transfer path 15 to which water purified by a purification device 14 described later is transferred is connected. The opening of the transfer path 15 is installed near the lower end of the first tank 2.
Further, a rainwater discharge passage 7 is provided between the first tank 2 and the second tank 3. The rainwater outlet path 7 is installed at a height of about 7 minutes from the bottom in the height direction of the tanks 2 and 3. When the amount of stored water 8 in the first tank 2 exceeds a predetermined minimum storage amount (about 4 tons in the present embodiment), the stored water 8 overflows through the rainwater discharge passage 7 and the second tank 3 is flowing.

In the vicinity of the lower end of the second tank 3, an emergency discharge line 16 capable of discharging the stored water 9 outward is provided. The emergency lead-out line 16 can be opened and closed manually even in the event of a power failure, and the water is led out by the pressure of the stored water 9. Further, at the lower end of the second tank 3, a water storage sensor 17 for detecting the amount of stored water 9 is provided. The water storage sensor 17 is connected to the computer 13.
A pump 18 is provided at the lower part of the second tank 3 on the side opposite to the side where the first tank 2 is provided. The pump 18 pumps out the stored water 9 of the second tank 3 and sends it to the purifiers 22 and 23 through the purification paths 19A and 19B, and also leads out of the system 1 through the outlet path 21. The pump 18 is set to be driven and stopped in synchronism with the timing of opening and closing of the solenoid valve 28 by the timer 27 described later.

As shown in FIG. 6, the purification device 14 includes two types of purifiers 22 and 23 provided in the purification paths 19A and 19B, and a purifier 24 provided in the lead-out path 21. Among them, the purifiers 22 and 23 provided in the purification paths 19A and 19B are two high speed purifiers 22 that process rainwater at a higher speed and one low speed purifier 23 that processes rainwater at a lower speed. . The high-speed purifier 22 is mainly provided with a filter medium for attaching microorganisms, and the low-speed purifier 23 is mainly provided with a filter medium for attaching organic substances. As for the high-speed purifier 22, two units having the same performance are provided in parallel to the purification path 19A. In the purification paths 19A and 19B, on the upstream side of the purifiers 22 and 23, adjusting valves 20 and 26 for adjusting the flow rate are provided.
Further, the adjustment valve 26 is provided upstream of the low speed purifier 23 in the purification path 19B. A solenoid valve 28 operated by a timer 27 is provided at a point before the purification paths 19A and 19B branch off. The timer 27 is of a 24-hour type, and opens the electromagnetic valve 28 for a predetermined time of the day so that the stored water 9 flows through the purification paths 19A and 19B. In the present embodiment, the stored waters 8 and 9 are circulated by repeating driving and stopping three to four times a day. The adjustment valves 20 and 26 are provided so as to change the ratio of the flow velocity to the purifiers 22 and 23. The ratio of the flow velocity of water to the low speed purifier 23 to the flow velocity of water to the high speed purifier 22 is set in the range of 1: 5 to 10.

Further, the purifier 24 provided in the lead-out passage 21 is provided with an ultra purification membrane. In the lead-out passage 21, on the upstream side of the purifier 24, an adjustment valve 29 is provided to adjust the flow rate. Furthermore, a bypass passage 36 and a control valve 37 are provided in order to use the stored water 9 for watering the plant without passing through the purifier 24. An open / close valve 30 and a lead-out port 35 are provided on the open end side of the lead-out path 21. When the open / close valve 30 is opened, the stored water 9 is drawn outward through the outlet 35 through the outlet passage 21 by driving the pump 18. Further, the power supply to the pump 18 is stopped by the closing operation of the release valve 30. Further, in the lead-out path 21, a lead-out amount detection sensor 33 is provided on the downstream side of the purifier 24. The derived amount detection sensor 33 is connected to the computer 13.
Further, in the purification paths 19A, 19B, transfer paths 31A, 31B, 15 for transferring rainwater to the second tank 3 are provided downstream of the purifiers 22, 23. In each of the transfer paths 31A, 31B, transfer water amount detection sensors 32A, 32B that detect the amount of water are provided. Each sensor 32A, 32B is connected to the computer 13. The downstream sides of the transfer paths 31 </ b> A and 31 </ b> B are connected to a single transfer path 15, and the other end side is installed near the lower end of the first tank 2.
The following effects can be obtained as the merits of purifying the purifiers 22 and 23 at two different flow rates.
(1) The removal rate of suspended solids in rainwater can be increased by rapid flow rate purification and slow purification.
(2) Aerobic microbes adhere in the rapid flow rate purification, anaerobic microbes adhere in the slow flow rate purification, and advanced purification treatment of organic matter dissolved in rain water can be performed.
(3) A more advanced treatment can be achieved by using a filter medium having a high ability to support microorganisms for rapid purification of flow velocity, and a filter medium having high deodorizing and decoloring ability for slow purification.
The computer 13 controls the system 1 and takes in the detection data from each sensor 12, 17, 32A, 32B, 33, and corresponds to another computer 34 (a “receiving device” in the present invention) provided at a remote place. Signal transmission / reception with each other.

<Explanation about the driving state of rainwater utilization system>
Next, the driving state of the system 1 configured as described above will be described with reference to FIGS. 7 to 11.
1. Movement of Rainwater and Storage Water First, the flow of rainwater and storage water in the system 1 will be described with reference to FIG. 7. Rain falling on the roof 4 flows downward along the weir 5 (S100). The rainwater that has passed through the eaves 5 flows into the first tank 2 through the filter 6 (S110) and is stored in the first tank 2 (S120: tank storage step). When the stored water 8 in the first tank 2 exceeds the minimum stored water amount (height position of the rainwater outlet path 7), the stored water 8 flows into the second tank 3 through the rainwater outlet path 7 (S130: Tank storage process).
The stored water 9 (S140) stored in the second tank 3 flows into the purification device 14 (S150) by the drive of the pump 18, and is processed by the purification device 14 (purification step). Then, it flows in into the 1st tank 2 again through the transfer path 15 (S160, S120: 2nd tank storage process). Thus, a loop of stored water of the first tank 2, the second tank 3 and the purification device 14 is formed.
On the other hand, when using the stored water 9, the stored water (S140) stored in the second tank 3 is drawn outward from the on-off valve 30 through the lead-out passage 21 by driving the pump 18 (stored water Use process).
As described above, the following effects are achieved by the purification treatment (circulation purification) while circulating the stored waters 8 and 9.
(1) The capacity of the entire tank can be reduced.
(2) Even when there is no newly flowing rainwater, it is possible to reduce the possibility that the stored water 8 and 9 used for disasters will rot.
(3) Since oxygen is supplied to the tanks 2 and 3 when water is circulated to the tanks 2 and 3 to supply the stored water 8, 9, oxygen can be supplied.
(4) It becomes difficult to clog the ultrapurification membrane (purifier 24) for utilizing shower or bath water.

2. Flow of Rainwater Between the First Tank and the Second Tank As shown in FIG. 8, when it rains (YES in S200), rainwater flows into the first tank 2 through the weir 5 (S210). Here, when the amount of stored water in the first tank 2 exceeds the minimum amount of stored water (YES in S220), the stored water 8 is transferred to the second tank 3 via the rainwater lead-out path 7 and stored water. 9 (S230).
Even when it is not raining (NO in S200), the stored water 9 flows into the first tank 2 through the purification device 14 by driving the pump 18 every predetermined time. Also in this case, there may be a case where the stored water amount of the first tank 2 exceeds the minimum stored water amount (YES in S220).

3. Flow of Reservoir Water When Driving Pump by Timer FIG. 9 shows a case where the pump 18 is driven by the timer 27 every predetermined time (for example, when the purification processing is performed three or four times a day). The flow of stored water was shown. At this time, all the stored water 8 and 9 is made into the flow volume which is the grade which performs the purification process by the purification apparatus 14 at least 1 rotation per day.
When the predetermined time comes (YES in S300), the pump 18 is driven, and the stored water 9 stored in the second tank 3 is sent to the purifier 14 (S310). In the purification device 14, purification processing of the stored water 9 is performed by making the treatment speed different by the two types of purifiers 22 and 23 (S320). The stored water 9 after the purification processing is again introduced into the first tank 2 through the transfer path 15 (S330).

4. Outline of operation when water is led out of the system 1 FIG. 10 shows an outline of operation when the stored water 9 is taken out of the system 1.
When the on-off valve 30 on the open end side of the lead-out passage 21 is opened (YES in S400), the stored water 9 of the second tank 3 is discharged through the lead-out passage 21 by driving the pump 18. Is derived to the outside (S410).
Further, when the on-off valve 30 is closed, the power supply to the pump 18 is stopped, and the pump is stopped to complete the derivation of water from the outlet 35 (S430).

5. Transmission / Reception of Signals Between System 1 and Remote Location FIG. 11 shows an outline of signal transmission between the system 1 and the remote computer 34. The remote area may be the range where the system 1 can be seen (for example, several hundred meters), or the range where the system 1 installed on a remote island is to be managed in another city (for example, several tens of kilometers to several It may be about 100 km). As a transmission line for transmitting a signal, it can be performed via a wired LAN, a wireless LAN, a telephone line, a wireless or the like.
The sensors 12, 17, 32A, 32B, 33 provided in the system 1 respectively detect the amount of stored water, the amount of liquid fed, and the amount led out to the outside (detection step). These data are processed and stored by the computer 13 at an appropriate time interval (for example, an arbitrary set interval of several seconds, several minutes, or several tens of minutes) (S500). Then, a signal including each measurement data is transmitted through the transmission line to another computer 34 at a remote location (S510: transmission step). On the other hand, another computer 34 monitors and manages the system 1. When the computer 34 sends a signal to end the measurement by each of the sensors 12, 17, 32A, 32B, 33 (YES in S520), the process is completed.

As described above, according to the present embodiment, the system 1 can be provided which can be used in an emergency while maintaining and managing the nature of rainwater over a long period of time.
By providing each sensor 12, 17, 32A, 32B, 33, the amount of stored water in the tanks 2, 3 and the amount of water circulating between the tank 3 and the purifier 14 and the amount of water derived and used outside can be remotely controlled. Since it can be monitored, it has become a useful system.

DESCRIPTION OF SYMBOLS 1 ... Rainwater utilization system, 2 ... 1st tank, 3 ... 2nd tank, 4 ... Roof, 5 ... 樋, 6 ... Filter, 7 ... Rain water lead-out path, 8, 9 ... Reservoir water, 10 ... Sediment conduction Exit, 11, 16 ... Emergency derivation line, 12, 17 ... Water storage sensor, 13 ... Computer, 14 ... Purification device, 15 ... Transfer path, 18 ... Pump, 19A, 19B ... Purification path, 21 ... Derivation path, 22 ... High-speed purifier, 23 ... Low-speed purifier, 27 ... Timer, 28 ... Solenoid valve, 31A, 31B ... Transfer path, 32A, 32B ... Transfer water amount detection sensor, 33 ... Derived amount detection sensor, 34 ... Another computer (receiver) )

Claims (12)

A filter for removing rainwater debris, a tank for receiving and storing rainwater processed by the filter, a pump for drawing out and transferring the water of the tank, a purification path for sending the water sent by the pump, and the purification A purification device for purifying the water that has passed through the passage, wherein the treated water processed by the purification device is transferred to the tank, and the water transferred by the pump is removed from the tank. A rainwater utilization system characterized in that a lead-out route leading to is provided. The tank is a first tank that receives rainwater and treated water, and a second tank that moves and stores an amount of water that has overflowed when the water stored in the first tank exceeds a predetermined minimum storage amount. The stormwater utilization system according to claim 1, wherein the tank is provided, and the purification device is configured to treat water from the second tank. In the first tank, a sediment outlet for discharging waste deposited at the lowermost portion outward, and water above the minimum storage amount above the sediment outlet. The rainwater utilization system according to claim 2, further comprising a rainwater lead-out path that leads to the second tank. In the first tank, an emergency derivation line capable of deriving water stored in the first tank to the outside at a position between the sediment outlet and the rainwater outlet path even during a power failure. The rainwater utilization system according to claim 2 or 3, wherein is provided. The purifier is provided with two types of purifiers, a high-speed purifier that processes water at a higher speed and a low-speed purifier that processes water at a lower speed. The rainwater utilization system according to any one of claims 1 to 4, wherein the low speed purifier is provided with a filter medium for organic matter attachment. The tank has a water storage sensor that detects the amount of water stored therein, the transfer path has a water transfer amount detection sensor that detects the amount of water, and the lead-out path has a derived amount detection sensor that detects the amount of water derived outward. The receiver according to any one of claims 1 to 5, further comprising a receiving device capable of receiving a signal from each of the sensors at a remote place remote from the place where the rainwater utilization system is provided. Rainwater utilization system described. A tank storage process leading to a storage tank after removing the rainwater collected in the weir, a purification process for pumping the water stored in the tank to a purification device by a pump, purification process, purification water A method for utilizing rainwater comprising a second tank storage step introduced into the tank, and a stored water use step of using the pump to lead out the water stored in the tank to the outside as needed. 8. The method according to claim 7, wherein the purification step carries out the stored water at least twice a day per day. In the tank, a first tank used in the tank storage process and the second tank storage process, water overflowing from a predetermined height position in the first tank is transferred, and a liquid transferred by the pump is transferred. The rainwater utilization method according to claim 7 or 8, which is separately provided for the second tank to be performed. The purifier is provided with two types of purifiers, a high-speed purifier that processes water at a higher speed and a low-speed purifier that processes water at a lower speed. 10. The method for utilizing rainwater according to any one of claims 7 to 9, wherein purification of microorganisms is performed in the low-speed purifier in which organic matter is purified. The rainwater utilization method according to claim 10, wherein the ratio of the flow velocity of water to the low speed purifier to the flow velocity of water to the high speed purifier is set in the range of 1: 5 to 10. A detection step for detecting the stored water amount of the tank, the liquid transfer amount of water when performing the second tank storage step, and the usage amount of water when performing the stored water use step, and detected data The rainwater utilization method as described in any one of Claims 7-11 which provided the transmission process which conveys to a distant place.