JP2021098188A - Water quality regulator - Google Patents

Abstract

To provide a water quality regulator capable of easily maintaining its function as a water quality regulator for a large number of magnesium grains.SOLUTION: A water quality regulator 150 has a body 151 which is cylindrical and bent into a "V" shape in appearance. The body 151 has a lower part 151a inclined at a predetermined angle θ to the vertical direction, and an upper part 151b inclined to the vertical direction by the same angle θ in the opposite direction to the lower part 151a. A large number of granular magnesium 152 as a water quality regulator is contained in the body 151. Rainwater flowing into the water quality regulator 150 is moved upward from the bottom of the body 151, where it mixes with the granular magnesium 152 and undergoes a chemical reaction. Therefore, the rainwater that was slightly acidic becomes slightly alkaline when it flows out of the water quality regulator 150.SELECTED DRAWING: Figure 13

Description

The present invention relates to a water quality regulator.

The rainwater storage device of Patent Document 1 includes an auxiliary tank in which rainwater is sent from a collecting surface such as a roof, a clean rainwater storage tank, a measuring tank used for measuring the electric conductivity of rainwater, and an auxiliary tank. It is provided with a first valve arranged between the rainwater tank, a second valve arranged between the auxiliary tank and the sewage outlet, and a third valve arranged between the measuring tank and the auxiliary tank. There is. Further, the rainwater storage device of Patent Document 1 includes a rain gauge that measures a certain amount of rainwater and sends it to a measuring tank, and an electric conductivity meter that measures the electric conductivity of a certain amount of rainwater stored in the measuring tank. It is equipped with a control unit.

When the control unit reads the electric conductivity signal from the electric conductivity meter, it opens the third valve to discharge the rainwater from the measuring tank to the auxiliary tank, closes the third valve again, and next electric conduction. Prepare for rate measurement. When the read electric conductivity signal falls below a predetermined value, the control unit opens the second valve and discharges the rainwater in the auxiliary tank to the sewage outlet. Then, after draining the auxiliary tank, the control unit closes the second valve and opens the first valve so that clean rainwater can be sent from the auxiliary tank to the water storage tank.

Japanese Unexamined Patent Publication No. 10-204934

An object of the present invention is to provide a water quality regulator whose function as a water quality regulator can be easily maintained for a large number of magnesium particles.

In order to achieve the above object, the water quality regulator of the invention of claim 1 includes a main body extending in the vertical direction to form a water flow from the lower side to the upper side, and a large number of granular magnesium contained in the main body. There is.

The invention of claim 2 is the invention in which the main body is inclined with respect to the vertical direction. The invention of claim 3 is the second aspect of the present invention, wherein the main body has a lower portion that is inclined at a predetermined angle with respect to the vertical direction and an upper portion that is inclined with respect to the vertical direction by the angle in the direction opposite to the lower portion. It has.

According to the present invention, a large number of magnesium particles exposed to a water stream from downward to upward in the main body are danced by the water stream and impactfully collide with each other, thereby removing the coating on the surface. The function as a water quality regulator is maintained.

It is a figure which shows the 1st Embodiment, and is a schematic diagram which shows a rainwater storage device and a cooling water circulation device. A flowchart showing a processing procedure of the control unit. It is a figure which shows the 2nd Embodiment, and is a schematic diagram which shows a part of a solar power plant. The schematic diagram which shows the other part of the solar power plant. A block diagram showing a control configuration. It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the main routine. It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (rainwater storage processing). It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (rainwater storage processing). It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (pure water production processing). It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (pure water production processing). It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (sterilization processing). It is a flowchart which shows the processing procedure of a control part, and is the figure which shows the subroutine (solar panel cleaning process). It is a figure which shows the 3rd Embodiment, and is a schematic diagram which shows a water quality regulator.

Hereinafter, the first to third embodiments embodying the present invention will be described.
[First Embodiment]
As shown in FIG. 1, the roof of the factory and the like form a water collecting surface 101, and the rainwater that has fallen on the water collecting surface 101 is received by the rain gutter 102. A large-diameter pipe 11 is connected to the gutter 102, and rainwater collected in the gutter 102 flows into the large-diameter pipe 11. The large-diameter pipe 11 is inclined downward toward the downstream side.

The first overflow pipe 12 is branched from the large diameter pipe 11. The first overflow pipe 12 overflows a part of the rainwater flowing through the large-diameter pipe 11 and sends it to the sewage port 103. A small diameter pipe 13 is connected to the downstream side of the large diameter pipe 11. The small-diameter pipe 13 includes a horizontal portion 13a connected to the large-diameter pipe 11 and a vertical portion 13b arranged on the downstream side of the horizontal portion 13a. The horizontal portion 13a is provided with a gradient that slightly descends toward the downstream side.

In the small diameter pipe 13, the second overflow pipe 14 is branched from the horizontal portion 13a. The second overflow pipe 14 overflows a part of the rainwater flowing through the small diameter pipe 13 and sends it to the sewage port 103. A rainwater tank 15 for storing clean rainwater is connected to the vertical portion 13b of the small-diameter pipe 13.

In the horizontal portion 13a of the small-diameter pipe 13, an on-off valve 16 composed of an electric drive valve such as a solenoid valve is arranged on the downstream side of the position where the second overflow pipe 14 is branched. In the horizontal portion 13a of the small-diameter pipe 13, an electric conductivity sensor 17 as a water quality sensor is arranged on the upstream side of the position where the second overflow pipe 14 is branched. Examples of the electric conductivity sensor 17 include an AC 2-electrode type, an AC 4-electrode type, and an electromagnetic induction type. The electric conductivity sensor 17 also serves as a rainfall sensor for detecting the presence or absence of rainfall.

The control unit 18 is a computer-like control unit. An on-off valve 16 and an electric conductivity sensor 17 are electrically connected to the I / O of the control unit 18. When the power is turned on, the control unit 18 starts processing according to a program stored in advance.

FIG. 2 is a flowchart showing a processing procedure of the program.
In step 201, it is determined whether or not the rainfall measurement signal from the electrical conductivity sensor 17 indicates a rainfall state. If the rainfall measurement signal from the electrical conductivity sensor 17 does not indicate a rainfall state (No determination), the process proceeds to step 202 to close the on-off valve 16 and monitor the presence or absence of rainfall in step 201. Is repeated.

In step 201, if the rainfall measurement signal from the electrical conductivity sensor 17 indicates a rainfall state (Yes determination), the process proceeds to step 203. In step 203, it is determined whether or not the measurement signal of the electric conductivity from the electric conductivity sensor 17 is equal to or less than a predetermined value L. In step 203, if the measurement signal of the electric conductivity from the electric conductivity sensor 17 exceeds the predetermined value L (No determination), it is determined that the rainwater is polluted, and the process proceeds to step 202 to move to the on-off valve. 16 is closed.

In step 203, if the measurement signal of the electric conductivity from the electric conductivity sensor 17 is equal to or less than a predetermined value L (yes determination), it is determined that the rainwater is clean, and the process proceeds to step 204. In step 204, the on-off valve 16 is opened. Returning from step 204, the monitoring of the presence or absence of rainfall in step 201 is repeated, or the monitoring of the presence or absence of rainfall in step 201 and the monitoring of the electrical conductivity in step 203 are repeated.

As shown in the graph in step 203, the predetermined value L is the threshold value of the electrical conductivity (first predetermined value L1) that opens the on-off valve 16 in the closed state and the on-off valve in the open state. Hysteretic characteristics are set so that the threshold value of the electric conductivity (second predetermined value L2 (> first predetermined value L1)) that sets 16 in the closed state is different from each other. Therefore, the momentary occurrence of opening / closing of the on-off valve 16 that tends to occur when only a single threshold value is set is avoided, and the control of the on-off valve 16 is stabilized.

By the way, in the initial rainwater during normal rainfall, pollutants in the air and roof are mixed, and it is hard to say that it is clean. In such a case, the measurement signal of the electric conductivity from the electric conductivity sensor 17 is, for example, 3 mS / m to 15 mS / m, which exceeds the predetermined value L (the first predetermined value L1 (for example, 1 mS / m)). The control unit 18 closes the on-off valve 16 to prevent the polluted initial rainwater from flowing into the rainwater tank 15.

Rainwater that has lost its escape area due to the on-off valve 16 being closed overflows from the small-diameter pipe 13 by the second overflow pipe 14 and is discharged to the sewage port 103, so that the small-diameter pipe 13 hardly flows back. ..

If the rainfall continues, the amount of pollutants mixed in the rainwater will decrease, so the measurement signal of the electrical conductivity from the electrical conductivity sensor 17 will gradually decrease, and eventually it will be equal to or less than the predetermined value L (first predetermined value L1). It becomes. Therefore, the control unit 18 opens the on-off valve 16 in the closed state so that clean rainwater flows into the rainwater tank 15.

When the rain stops or the measurement signal of the electric conductivity from the electric conductivity sensor 17 exceeds the predetermined value L (second predetermined value L2 (for example, 1.1 mS / m)), the control unit 18 is opened. The on-off valve 16 in the state is closed.

In normal rainfall, the amount of rainfall per unit time is not so large, so that in the large-diameter pipe 11, the rainwater does not stagnate at the connection portion with the small-diameter pipe 13, or even if it stagnate, it is the first. 1 The amount from the overflow pipe 12 to the sewage port 103 is not so large.

Next, the case of heavy rain will be described. In particular, in heavy rain caused by a typhoon that winds up seawater, the measurement signal of the electric conductivity from the electric conductivity sensor 17 may exceed 20 mS / m due to severe pollution (salt damage). In such a case, the control unit 18 closes the on-off valve 16 to prevent polluted rainwater from flowing into the rainwater tank 15, as in the case of dealing with the initial rainwater described above.

In the case of heavy rain, since the amount of rainfall per unit time is large, the amount of stagnation of rainwater at the connection portion with the small-diameter pipe 13 increases in the large-diameter pipe 11. Therefore, the amount of rainwater from the first overflow pipe 12 to the sewage port 103 increases. The first overflow pipe 12 connected to the large-diameter pipe 11 is relatively easy to increase the drainage capacity. Therefore, even during heavy rain, it is possible to prevent rainwater from flowing back through the large-diameter pipe 11 and overflowing at an unexpected location.

Further, by providing the first overflow pipe 12, the amount of rainwater flowing from the large diameter pipe 11 to the small diameter pipe 13 can be suppressed even in heavy rain. Therefore, even if the drainage capacity of the second overflow pipe 14 connected to the small-diameter pipe 13 is low, it is possible to prevent rainwater from flowing back through the small-diameter pipe 13 and overflowing at an unexpected location.

According to the rainwater storage device having the above configuration, the on-off valve 16 and the electric conductivity sensor 17 arranged in the small-diameter pipe 13 may be small. Further, according to the rainwater storage device, a plurality of tanks and valves are not required. Therefore, it is possible to cope with heavy rain while avoiding the problems of large size and complexity of the rainwater storage device. In these cases, the pipe is composed of a large-diameter pipe 11 on the upstream side and a small-diameter pipe 13 on the downstream side, and the large-diameter pipe 11 has a first overflow pipe 12 and the small-diameter pipe 13 has a second overflow pipe 14. However, it is established when each is provided.

Next, the cooling water circulation device attached to the rainwater storage device will be described. The cooling water circulation device is used to cool a manufacturing device (not shown) such as a resin molding machine installed in a factory.

As shown in FIG. 1, the cooling water circulation device includes a cooling water tank 31. The cooling water tank 31 and the rainwater tank 15 of the rainwater storage device are connected via a supply pipe 32. The supply pipe 32 includes a pump 32a. The clean rainwater in the rainwater tank 15 is supplied to the cooling water tank 31 via the supply pipe 32 by the action of the pump 32a.

The cooling water tank 31 and the manufacturing apparatus are connected to each other via a going-side pipe 33. The going side pipe 33 includes a pump 33a. The rainwater (cooling water) of the cooling water tank 31 is supplied to the manufacturing apparatus via the going-side pipe 33 by the action of the pump 33a.

The manufacturing apparatus and the cooling water tank 31 are connected to each other via a return-side pipe 34. The return side pipe 34 includes a cooling tower 34a. The high-temperature cooling water returned from the manufacturing apparatus is returned to the cooling water tank 31 via the return side pipe 34 while being cooled by the cooling tower 34a.

A branch pipe 35 is connected to the downstream side of the pump 33a in the going side pipe 33. The branch pipe 35 connects the going side pipe 33 and the cooling water tank 31. The branch pipe 35 includes a manual on-off valve 35a and a water quality regulator 41. The water quality regulator 41 has a function for adjusting the pH (hydrogen ion index) of the cooling water.

The water quality regulator 41 includes a cylindrical main body 42 extending in the vertical direction. A lid 42a is attached to the upper end of the main body 42. A transparent window portion 42b is provided in the central portion of the main body 42. An outflow pipe 43 constituting the downstream side of the branch pipe 35 is connected to the upper part of the main body 42. An inflow pipe 44 constituting the upstream side of the branch pipe 35 is connected to the lower end of the main body 42.

A large number of granular magnesium 45 as a water quality regulator (pH regulator) is contained in the main body 42. At the lower end of the main body 42, a mesh filter 46 that receives magnesium 45 and prevents it from falling downward is arranged. A mesh filter 47 that receives magnesium 45 and prevents it from flowing out to the downstream side is arranged in the outflow pipe 43.

When the pump 33a of the going-side pipe 33 operates while the on-off valve 35a of the branch pipe 35 is open, a part of the cooling water from the cooling water tank 31 to the manufacturing apparatus adjusts the water quality via the branch pipe 35. It is sent to the vessel 41. The cooling water flowing into the water quality regulator 41 is moved from the lower side to the upper side of the main body 42, is mixed with the granular magnesium 45, and undergoes a chemical reaction.

Therefore, the weakly acidic cooling water (rainwater) becomes weakly alkaline when it flows out from the water quality regulator 41, and is returned to the cooling water tank 31. The weakly alkaline cooling water makes it difficult for scale to be generated in the cooling water channel in the manufacturing apparatus and makes the cooling water channel less likely to rust at a high level.

In the main body 42, a large number of magnesium 45 particles exposed to a water flow from the bottom to the top are danced by the water flow and collide with each other in a shocking manner, so that the coating on the surface is removed and the magnesium 45 is used as a water quality modifier. Function is sustained. The degree of consumption of magnesium 45 can be confirmed through the window portion 42b of the main body 42. Magnesium 45 is replenished by removing the lid 42a of the main body 42.

[Second Embodiment]
3 and 4 show a photovoltaic power plant equipped with a solar panel 111. The electricity generated by the solar panel 111 is stored in a storage battery 112 installed near the solar panel 111. The light receiving surface 111a of the solar panel 111 forms a water collecting surface, and the rainwater that has fallen on the light receiving surface 111a is received by the rain gutter 113. A plurality of (three in this embodiment) first large-diameter pipes 51 to 3 third large-diameter pipes 53 are connected to the rain gutter 113, and the rainwater collected in the rain gutter 113 is the first large-diameter pipes 51 to 1st. 3 It flows into the large-diameter pipe 53.

The first overflow pipe 54 is branched from the first large-diameter pipe 51 to the third large-diameter pipe 53, respectively. Each first overflow pipe 54 overflows a part of rainwater flowing through the corresponding first large-diameter pipes 51 to 3 and sends it to the sewage port 114. A small diameter pipe 55 is connected to the downstream side of the first large diameter pipe 51 to the third large diameter pipe 53.

The small-diameter pipe 55 includes a main pipe 56 that descends from the vicinity of the first large-diameter pipe 51 to the vicinity of the third large-diameter pipe 53 via the vicinity of the second large-diameter pipe 52, and the first large-diameter pipe 51. The first branch pipe 57 is connected to the upstream end of the main pipe 56, the second branch pipe 58 is connected to the second large diameter pipe 52 and the main pipe 56, and the third large diameter pipe 53 and the main pipe 56 are connected to each other. It is provided with a third branch pipe 59.

In the main pipe 56, the first branch pipe 60 is branched from between the first branch pipe 57 and the second branch pipe 58. A first rainwater tank 61 is connected to the first branch pipe 60. In the main pipe 56, the second branch pipe 62 is branched from between the second branch pipe 58 and the third branch pipe 59. A second rainwater tank 63 is connected to the second branch pipe 62.

A pure water sub-tank 64 is connected to the downstream end of the main pipe 56. The second overflow pipe 65 is connected to the third branch pipe 59, and the third branch pipe 59 and the first overflow pipe 54 corresponding to the third large diameter pipe 53 are connected by the second overflow pipe 65.

A first on-off valve 70 composed of an electrically driven valve such as a solenoid valve is arranged in the first branch pipe 60. A second on-off valve 71 composed of an electrically driven valve such as a solenoid valve is arranged in the second branch pipe 62. A third on-off valve 72 composed of an electric drive valve such as a solenoid valve is arranged on the downstream side of the main pipe 56 from the position where the third branch pipe 59 is connected.

In the third branch pipe 59, the electric conductivity sensor 73 is arranged on the third large diameter pipe 53 side of the position where the second overflow pipe 65 is connected. Examples of the electric conductivity sensor 73 include an AC 2-electrode type, an AC 4-electrode type, and an electromagnetic induction type. The electric conductivity sensor 73 also serves as a rainfall sensor for detecting the presence or absence of rainfall.

The first rainwater tank 61 is provided with a first water level sensor 75. The second rainwater tank 63 is provided with a second water level sensor 76. The pure water sub-tank 64 is provided with a third water level sensor 77.

The water intake pipe 80 includes a main pipe 81, a first branch pipe 82 connecting the main pipe 81 and the first rainwater tank 61, a second branch pipe 83 connecting the main pipe 81 and the second rainwater tank 63, and a main pipe 81 and pure water. It is provided with a third branch pipe 84 for connecting to the sub tank 64 for use.

A fourth on-off valve 85, which is an electrically driven valve such as a solenoid valve, is arranged in the first branch pipe 82. A fifth on-off valve 86, which is an electrically driven valve such as a solenoid valve, is arranged in the second branch pipe 83. A sixth on-off valve 87, which is an electrically driven valve such as a solenoid valve, is arranged in the third branch pipe 84.

In the main pipe 81, the first pump 88 is arranged between the position where the second branch pipe 83 is connected and the position where the third branch pipe 84 is connected. A second pump 89 is arranged between the sixth on-off valve 87 and the pure water sub-tank 64 in the third branch pipe 84.

As shown in FIG. 4, the end of the main pipe 81 of the intake pipe 80 on the downstream side is connected to the main tank 91 for pure water. The pure water main tank 91 is provided with a fourth water level sensor 92. An ultraviolet sterilizer 93 is arranged in the pure water main tank 91.

In the main pipe 81, a pure water maker 94 is arranged between the position where the third branch pipe 84 (see FIG. 3) is connected and the pure water main tank 91. The pure water maker 94 includes a spool filter 95, an activated carbon filter 96, and an ion exchange resin 97 in this order from the upstream side.

As shown in FIGS. 3 and 4, a plurality of watering nozzles 98 (only one is shown in the drawings) are arranged on the solar panel 111 so as to face the light receiving surface 111a. As shown in FIG. 4, the watering nozzle 98 and the pure water main tank 91 are connected to each other via a watering pipe 99. A third pump 100 is arranged in the sprinkler pipe 99.

As shown in FIG. 5, the control unit 120 is a computer-like control unit. The I / O of the control unit 120 includes a first on-off valve 70 to a sixth on-off valve 87, an electric conductivity sensor 73, a first water level sensor 75 to a fourth water level sensor 92, a first pump 88 to a third pump 100, and the like. The UV sterilizer 93 is electrically connected. These electrical devices are powered by a storage battery 112 (see FIG. 3).

When the power is turned on, the control unit 120 starts processing according to a program stored in advance. 6 to 12 are flowcharts showing the processing procedure of the program.

(Main routine)
FIG. 6 shows the main routine. In step 301, a rainwater storage process for storing clean rainwater in the first rainwater tank 61, the second rainwater tank 63, and the pure water sub-tank 64 is performed. In step 302, pure water is produced using the clean rainwater stored in the first rainwater tank 61, the second rainwater tank 63, and the pure water sub-tank 64, and the produced pure water is used as the main for pure water. A pure water production process for storing in the tank 91 is performed.

In step 303, a sterilization process for sterilizing the pure water stored in the pure water main tank 91 is performed. In step 304, the solar panel cleaning process for cleaning the light receiving surface 111a of the solar panel 111 is performed using the pure water stored in the pure water main tank 91.

(Rainwater storage treatment)
7 and 8 show the stormwater storage treatment.
As shown in FIG. 7, in step 401, it is determined whether or not the rainfall measurement signal from the electric conductivity sensor 73 indicates a rainfall state. If the rainfall measurement signal from the electric conductivity sensor 73 does not indicate a rainfall state (No determination), the process proceeds to step 402 and the first on-off valve 70 to the third on-off valve 72 are closed.

In step 401, if the rainfall measurement signal from the electrical conductivity sensor 73 indicates a rainfall state (Yes determination), the process proceeds to step 403. In step 403, it is determined whether or not the measurement signal of the electric conductivity from the electric conductivity sensor 73 is equal to or less than a predetermined value M1 (for example, 1 mS / m).

In step 403, if the measurement signal of the electric conductivity from the electric conductivity sensor 73 exceeds the predetermined value M1 (No determination), it is determined that the rainwater is polluted, and the process proceeds to step 402. In step 402, the first on-off valve 70 to the third on-off valve 72 are closed.

Therefore, rainwater is not allowed to flow into the first rainwater tank 61, the second rainwater tank 63, and the pure water sub-tank 64. Rainwater that cannot flow into the first rainwater tank 61, the second rainwater tank 63, and the pure water sub-tank 64 is sent to the sewage port 114 via the first overflow pipe 54 and / or the second overflow pipe 65.

On the other hand, in step 403, if the measurement signal of the electric conductivity from the electric conductivity sensor 73 is a predetermined value M1 or less (Yes determination), it is determined that the rainwater is clean, and the process proceeds to step 404. In step 404, it is determined whether or not the measurement signal of the electric conductivity from the electric conductivity sensor 73 is a predetermined value M2 (<M1, for example, 0.5 mS / m) or less.

In step 404, if the measurement signal of the electric conductivity from the electric conductivity sensor 73 is a predetermined value M2 or less (Yes determination), it is determined that the cleanliness of the rainwater is high, and the process proceeds to step 405. In step 405, it is determined whether or not the water level signal from the third water level sensor 77 is less than the predetermined value S3F.

In step 405, if the water level signal from the third water level sensor 77 is less than the predetermined value S3F (yes determination), it is determined that the pure water sub-tank 64 has a space for rainwater to flow in, and step 406 is performed. Will be migrated. In step 406, the first on-off valve 70 and the second on-off valve 71 are closed, and the third on-off valve 72 is opened. Therefore, highly clean rainwater is allowed to flow only into the pure water sub-tank 64.

On the other hand, in step 405, if the water level signal from the third water level sensor 77 is equal to or higher than the predetermined value S3F (No determination), it is determined that there is no space for the rainwater to flow into the pure water sub tank 64, and FIG. The process proceeds to step 407 shown in 8. In step 407, the third on-off valve 72 is closed. Therefore, rainwater is not allowed to flow into the pure water sub-tank 64. From step 407, the process proceeds to step 408.

In step 408, it is determined whether or not the water level signal from the first water level sensor 75 is less than the predetermined value S1F. In step 408, if the water level signal from the first water level sensor 75 is less than the predetermined value S1F (yes determination), it is determined that the first rainwater tank 61 has a vacancy for flowing rainwater, and step 409 is performed. Will be migrated. In step 409, the first on-off valve 70 is opened and the second on-off valve 71 is closed. Therefore, the rainwater is allowed to flow only into the first rainwater tank 61.

On the other hand, in step 408, if the water level signal from the first water level sensor 75 is equal to or higher than the predetermined value S1F (No determination), it is determined that there is no space for the rainwater to flow into the first rainwater tank 61, and the step Moved to 410. In step 410, the first on-off valve 70 is closed. Therefore, the rainwater is not allowed to flow into the first rainwater tank 61.

From step 410, the process proceeds to step 411, and it is determined whether or not the water level signal from the second water level sensor 76 is less than the predetermined value S2F. In step 411, if the water level signal from the second water level sensor 76 is less than the predetermined value S2F (yes determination), it is determined that the second rainwater tank 63 has a space for rainwater to flow in, and step 412 is performed. Will be migrated. In step 412, the second on-off valve 71 is opened. Therefore, the rainwater is allowed to flow only into the second rainwater tank 63.

On the other hand, in step 411, if the water level signal from the second water level sensor 76 is equal to or higher than the predetermined value S2F (No determination), it is determined that there is no space for the rainwater to flow into the second rainwater tank 63, and the step It is transferred to 413. In step 413, the second on-off valve 71 is closed. Therefore, the rainwater is not allowed to flow into the second rainwater tank 63.

That is, in the rainwater storage treatment, rainwater having a higher degree of cleanliness is selected from the clean rainwater and stored in the pure water sub-tank 64. Further, when the pure water sub-tank 64 is so-called "full tank", in order to effectively utilize the highly clean rainwater without discharging it to the sewage outlet 114, the first rainwater tank 61 and the vacant first rainwater tank 61 and the rainwater are vacant. / Or it is stored in the second rainwater tank 63.

As shown in FIG. 7, in step 404 described above, if the measurement signal of the electric conductivity from the electric conductivity sensor 73 exceeds the predetermined value M2 (No determination), that is, the measurement signal exceeds M2. If it is M1 or less, it is determined that the cleanliness of the rainwater is moderate, and the process proceeds to step 407 shown in FIG. 8, and steps 407 to 413 are executed in the same manner as described above.

That is, in the rainwater storage treatment, rainwater having a medium degree of cleanliness is stored in the first rainwater tank 61 and / or the second rainwater tank 63 and not in the pure water sub-tank 64. ..

When the measurement signal of the electric conductivity from the electric conductivity sensor 73 is between M2 and M1, among the first on-off valve 70 and the second on-off valve 71, depending on the cleanliness (electrical conductivity) of the rainwater. By keeping only one open and the other not open, the cleanliness of the rainwater stored in the first rainwater tank 61 and the rainwater stored in the second rainwater tank 63 are positively different. May be good.

(Pure water production process)
9 and 10 show the pure water production process.
As shown in FIG. 9, in step 501, it is determined whether or not the water level signal from the fourth water level sensor 92 is less than the predetermined value S4F. In step 501, if the water level signal from the fourth water level sensor 92 is equal to or higher than the predetermined value S4F (No determination), it is determined that there is no space for rainwater to flow into the pure water main tank 91, and step 502 is performed. Will be migrated.

In step 502, the fourth on-off valve 85 to the sixth on-off valve 87 are closed, and the first pump 88 and the second pump 89 are stopped. Therefore, the rainwater from the first rainwater tank 61, the second rainwater tank 63, and the pure water sub-tank 64 is not sent to the pure water producer 94.

On the other hand, in step 501, if the water level signal from the fourth water level sensor 92 is less than the predetermined value S4F (Yes determination), it is determined that the main tank 91 for pure water has a space for rainwater to flow in, and step 503 Will be migrated to.

In step 503, it is determined whether or not the water level signal from the third water level sensor 77 exceeds the predetermined value S3E. In step 503, if the water level signal from the third water level sensor 77 exceeds the predetermined value S3E (yes determination), it is determined that the storage amount of the pure water sub-tank 64 is large, and the process proceeds to step 504.

In step 504, the fourth on-off valve 85 and the fifth on-off valve 86 are closed, the sixth on-off valve 87 is opened, the first pump 88 is stopped, and the second pump 89 is closed. It is put into operation.

Therefore, the rainwater in the pure water sub-tank 64 is sent to the pure water maker 94 by the action of the second pump 89. The rainwater sent to the pure water maker 94 has a high pure water (for example, an electric conductivity of 0.1 mS / m or less) due to the action of the thread winding filter 95, the activated carbon filter 96 and the ion exchange resin 97 to lower the electric conductivity. After being made into pure water), it flows into the main tank 91 for pure water.

On the other hand, in step 503, if the water level signal from the third water level sensor 77 is equal to or less than the predetermined value S3E (No determination), it is determined that the storage amount of the pure water sub-tank 64 is small, and the process proceeds to step 505 of FIG. Will be done. In step 505, it is determined whether or not the water level signal from the first water level sensor 75 is equal to or less than the predetermined value S1E. In step 505, if the water level signal from the first water level sensor 75 exceeds the predetermined value S1E (No determination), it is determined that the storage amount of the first rainwater tank 61 is large, and the process proceeds to step 506.

In step 506, the fifth on-off valve 86 and the sixth on-off valve 87 are closed, the fourth on-off valve 85 is opened, the second pump 89 is stopped, and the first pump 88 is stopped. It is put into operation.

Therefore, the rainwater in the first rainwater tank 61 is sent to the pure water maker 94 by the action of the first pump 88. The rainwater sent to the pure water maker 94 is made into high pure water by the action of the spool filter 95, the activated carbon filter 96 and the ion exchange resin 97 to reduce the electrical conductivity, and then to the main tank 91 for pure water. Flow in.

On the other hand, in step 505, if the water level signal from the first water level sensor 75 is equal to or less than the predetermined value S1E (yes determination), it is determined that the storage amount of the first rainwater tank 61 is small, and the process proceeds to step 507. In step 507, it is determined whether or not the water level signal from the second water level sensor 76 is equal to or less than the predetermined value S2E. In step 507, if the water level signal from the second water level sensor 76 exceeds the predetermined value S2E (No determination), it is determined that the storage amount of the second rainwater tank 63 is large, and the process proceeds to step 508.

In step 508, the fourth on-off valve 85 and the sixth on-off valve 87 are closed, the fifth on-off valve 86 is in the open state, the second pump 89 is stopped, and the first pump 88 is in the stopped state. It is put into operation.

Therefore, the rainwater in the second rainwater tank 63 is sent to the pure water maker 94 by the action of the first pump 88. The rainwater sent to the pure water maker 94 is made into high pure water by the action of the spool filter 95, the activated carbon filter 96 and the ion exchange resin 97 to reduce the electrical conductivity, and then to the main tank 91 for pure water. Flow in.

On the other hand, in step 507, if the water level signal from the second water level sensor 76 is equal to or less than the predetermined value S2E (yes determination), it is determined that the storage amount of the second rainwater tank 63 is small, and the process proceeds to step 509. In step 509, the fourth on-off valve 85 to the sixth on-off valve 87 are closed, and the first pump 88 and the second pump 89 are stopped.

That is, in the pure water production process, the load on the pure water maker 94 is reduced to produce pure water by producing high pure water using highly clean rainwater stored in the pure water sub-tank 64. The performance deterioration of the vessel 94 is suppressed. When the storage amount of the pure water sub-tank 64 is small, high pure water is produced by using the rainwater of the first rainwater tank 61 and the second rainwater tank 63, which have medium cleanliness, for pure water. It is designed to ensure abundant storage capacity in the main tank 91 and to suppress deterioration of the performance of the pure water maker 94 at a high level.

(Sterilization)
FIG. 11 shows a sterilization process.
In step 601 it is determined whether or not the water level signal from the fourth water level sensor 92 exceeds the predetermined value S4E. In step 601, if the water level signal from the fourth water level sensor 92 exceeds the predetermined value S4E (yes determination), it is determined that the amount of high pure water stored in the pure water main tank 91 is large, and the process proceeds to step 602. To. In step 602, the ultraviolet sterilizer 93 is put into operation, and the high pure water stored in the pure water main tank 91 is sterilized.

On the other hand, in step 601 if the water level signal from the fourth water level sensor 92 is equal to or less than the predetermined value S4E (No determination), it is determined that the amount of high pure water stored in the pure water main tank 91 is small, and the process proceeds to step 603. Will be done. In step 603, the ultraviolet sterilizer 93 is stopped to avoid unnecessary sterilization treatment.

(Solar panel cleaning process)
FIG. 12 shows a solar panel cleaning process.
In step 701, it is determined whether or not a predetermined maintenance time has arrived based on the calendar function and the clock function built in the control unit 120. If it is determined in step 701 that the maintenance time has not arrived (No determination), it is determined that it is not necessary to clean the light receiving surface 111a of the solar panel 111, and the process proceeds to step 702. In step 702, the third pump 100 is stopped.

On the other hand, in step 701, when it is determined that the maintenance time has come (Yes determination), the process proceeds to step 703. In step 703, it is determined whether or not the water level signal from the fourth water level sensor 92 exceeds the predetermined value S4E. In step 703, if the water level signal from the fourth water level sensor 92 is equal to or less than the predetermined value S4E (No determination), it is determined that the amount of water stored in the pure water main tank 91 is small, and the process proceeds to step 702 to move to the third pump. 100 is in the stopped state.

On the other hand, in step 703, if the water level signal from the fourth water level sensor 92 exceeds the predetermined value S4E (yes determination), it is determined that the storage amount of the pure water main tank 91 is large, and the process proceeds to step 704. To. In step 704, the third pump 100 is put into operation.

Therefore, the high pure water in the pure water main tank 91 is sent to the watering nozzle 98 via the watering pipe 99 by the action of the third pump 100. The high pure water sent to the watering nozzle 98 is sprayed on the light receiving surface 111a of the solar panel 111. Therefore, the light receiving surface 111a of the solar panel 111 is cleaned with high pure water.

Since high pure water has a higher cleaning effect than tap water or the like, it is not necessary to use a detergent when cleaning the light receiving surface 111a of the solar panel 111, and the environmental load is small. Further, since high pure water has less impurities than tap water or the like, cleaning does not damage the light receiving surface 111a of the solar panel 111. Further, since the high pure water is produced in the vicinity of the solar panel 111 by using the rainwater that has fallen on the solar panel 111, there is no trouble of transporting the high pure water to the solar power plant.

In step 705, it is determined whether or not the operating time of the third pump 100 is less than a predetermined time. If it is determined in step 705 that the operating time of the third pump 100 is less than the predetermined time (yes determination), the operating state of the third pump 100 is continued.

On the other hand, if it is determined in step 705 that the operating time of the third pump 100 is equal to or longer than a predetermined time (No determination), the process proceeds to step 702 and the third pump 100 is stopped, and thus sunlight. Cleaning of the panel 111 is stopped.

[Third Embodiment]
FIG. 13 shows, for example, a water quality regulator 150 used as an alternative to the water quality regulator 41 (see FIG. 1) in the first embodiment. The water quality regulator 150 includes a main body 151 that has a cylindrical shape and is bent in a “dogleg” shape in appearance.

The main body 151 includes a lower portion 151a that is inclined at a predetermined angle θ with respect to the vertical direction (vertical direction of the paper surface), and an upper portion 151b that is inclined with respect to the vertical direction by the same angle θ in the direction opposite to the lower portion 151a. .. The posture of the water quality regulator 150 is stabilized by the action of so-called counterbalance in which the upper portion 151b is inclined to the opposite side of the lower portion 151a by the same angle θ. The angle θ of the inclination is set to 10 ° to 30 °.

The main body 151 is provided with a transparent window portion 151c. An outflow pipe 43 constituting the downstream side of the branch pipe 35 is connected to the upper portion 151b of the main body 151. An inflow pipe 44 constituting the upstream side of the branch pipe 35 is connected to the lower portion 151a of the main body 151.

A large number of granular magnesium 152 as a water quality regulator (pH regulator) is contained in the main body 151. A mesh filter 153 that receives magnesium 152 and prevents it from falling downward is arranged in the lower portion 151a of the main body 151. A mesh filter 154 that receives magnesium 152 and prevents it from flowing out to the downstream side is arranged in the upper portion 151b of the main body 151.

The water quality regulator 150 of the present embodiment has the same function as the water quality regulator 41 of the first embodiment, thereby making the weakly acidic cooling water (rainwater) weakly alkaline. At this time, since the main body 151 is inclined with respect to the vertical direction, a large number of magnesium 152 particles exposed to the water flow from the lower side to the upper side are likely to rise, and the course and / or gravity at the time of the rise. The course is easily disturbed when descending.

Therefore, the mixing of the cooling water and magnesium 152, that is, the chemical reaction is promoted. In particular, the inclination angle θ of the main body 151 is set to 10 ° to 30 °. Therefore, the mixing of the cooling water and the magnesium 152 is performed more effectively.

That is, if the inclination angle θ of the main body 151 is less than 10 °, it becomes difficult for the magnesium 152 exposed to the water flow from the lower side to the upper side to rise. Further, when the inclination angle θ of the main body 151 exceeds 30 °, the magnesium 152 exposed to the water flow from the lower side to the upper side is less likely to be disturbed in the course of the ascent and / or the course of the gravity descent. In that sense, the inclination angle θ is more preferably 15 ° to 17 °, and therefore the design should be aimed at 16 °.

[Another example]
The embodiment can be modified as follows, for example.
○ In the first embodiment, the small diameter pipe 13 is connected to the sewage port 103, and the second overflow pipe 14 is connected to the rainwater tank 15. In this case, the control unit 18 closes the on-off valve 16 when it is raining and the measurement signal of the electric conductivity from the electric conductivity sensor 17 is a predetermined value L or less. Further, the control unit 18 opens the on-off valve 16 when it is not in a rainy state or when the measurement signal of the electric conductivity from the electric conductivity sensor 17 exceeds a predetermined value L.

○ In the first embodiment, the on-off valve 16 is arranged in the second overflow pipe 14.

○ In the first embodiment, a pure water maker shall be installed in the rainwater storage device. The pure water maker is provided with, for example, an ion exchange resin, and by passing rainwater supplied from the rainwater tank 15 through the ion exchange resin, the electric conductivity of the rainwater is set to 0.1 mS / m or less. By using an ion exchange resin, almost all of the rainwater supplied to the pure water maker can be collected as high pure water without waste. A large amount of high pure water can be produced at low cost.

〇 In the second embodiment, there are a plurality of main tanks 91 for pure water. Further, in the main pipe 81 of the water intake pipe 80, a water quality sensor (for example, an electric conductivity sensor or a resistivity sensor) is arranged on the downstream side of the pure water maker 94, and a flow path switching valve is arranged on the downstream side of the water quality sensor. To place.

Then, the control unit 120 controls the flow path switching valve based on the measurement signal from the water quality sensor, so that the storage destination of the rainwater flowing out from the pure water maker 94 can be stored in the plurality of pure water main tanks. Make it one of 91.

In this way, pure water having different water qualities (for example, electrical conductivity and resistivity) can be produced according to the intended use. That is, for example, ultrapure water used for cleaning semiconductors, high pure water used for cleaning precision parts, and pure water used for general cleaning and humidifiers can be produced separately.

〇 The water quality regulator 41 of the first embodiment or the water quality regulator 150 of the third embodiment is installed in the bathtub of the bathroom, and the hot water that has passed through the water quality regulator 41 or the water quality regulator 150 is supplied to the bathtub. By doing so, the bathtub should be a so-called "hydrogen bath" or "oxidation-reduction water bath".

[Additional Notes]
The technical idea that can be grasped from the above-described embodiment will be described.
(1) A method for producing high pure water having an electric conductivity of 0.1 mS / m or less by collecting clean rainwater and passing the rainwater through an ion exchange resin.

By doing so, it is possible to produce high pure water at a low cost as compared with the case of producing high pure water using tap water, for example. That is, the electric conductivity of tap water is 10 mS / m to 20 mS / m in many areas, whereas that of clean rainwater is 0.2 mS / m to 1.0 mS / m. Therefore, if clean rainwater is selected and collected, it is not necessary to pass the rainwater through the ion exchange resin many times or to use an inefficient reverse osmosis membrane, and the manufacturing cost can be reduced.

More specifically, for example, in the case of producing high pure water from rainwater having an electric conductivity of about 1.0 mS / m, the production cost is 1/10 to 1/20 as compared with the case of producing high pure water from tap water. It becomes a degree. Further, when high pure water is produced from rainwater having an electric conductivity of about 0.2 mS / m, the production cost is about 1/50 to 1/100 as compared with the case where high pure water is produced from tap water.

(2) A photovoltaic power plant equipped with a solar panel, in which the light receiving surface of the solar panel forms a water collecting surface, and a pure water maker that produces pure water from rainwater that has fallen on the light receiving surface. An attached solar power plant equipped with a cleaning device for cleaning the light receiving surface with pure water produced by the pure water maker.

(3) A water quality regulator including a main body extending in the vertical direction and forming a water flow from the lower side to the upper side, and a large number of granular magnesium contained in the main body.

(4) The water quality regulator according to the technical idea (3), wherein the main body is inclined with respect to the vertical direction.

(5) The technical idea that the main body includes a lower portion that is inclined at a predetermined angle with respect to the vertical direction and an upper portion that is inclined with respect to the vertical direction by the angle in the direction opposite to the lower portion (4). Water quality regulator described in.

(6) A large-diameter pipe through which the collected rainwater passes, a first overflow pipe branched from the large-diameter pipe to overflow the rainwater of the large-diameter pipe, a small-diameter pipe connected to the large-diameter pipe, and the above. A second overflow pipe branched from the small-diameter pipe to overflow the rainwater of the small-diameter pipe, a rainwater tank connected to the small-diameter pipe or the second overflow pipe to store clean rainwater, and the second overflow pipe. Alternatively, the on-off valve arranged on the downstream side of the position where the second overflow pipe is branched in the small diameter pipe and the water quality arranged on the upstream side of the position where the second overflow pipe is branched in the small diameter pipe. A rainwater storage device including a sensor and a control unit that controls the on-off valve based on a signal from the water quality sensor so that clean rainwater flows into the rainwater tank.

41 ... Water quality regulator, 42 ... Main body, 45 ... Magnesium, 150 ... Water quality regulator, 151 ... Main body, 151a ... Lower, 151b ... Upper, 152 ... Magnesium.

Claims (3)

A water quality regulator having a main body extending in the vertical direction and forming a water flow from the lower side to the upper side, and a large number of granular magnesium contained in the main body. The water quality regulator according to claim 1, wherein the main body is inclined with respect to the vertical direction. The water quality regulator according to claim 2, wherein the main body includes a lower portion that is inclined at a predetermined angle with respect to the vertical direction and an upper portion that is inclined with respect to the vertical direction by the angle in the direction opposite to the lower portion. ..

Images