JPH07166586A - Rainwater purification tank - Google Patents

Abstract

(57) [Summary] [Purpose] In the development of housing estates on slopes, the energy of the water position is used to control the amount of rainwater treated and ensure stable reuse. [Structure] A raw water treatment storage tank 3 having a settling treatment chamber 1 for separating and precipitating collected sediment of rainwater and a storage chamber 2 for storing treated raw water, and a treatment discharged from the raw water treatment storage tank 3. A filtration tank 4 for filtering raw water, and the precipitation treatment chamber 1 and the storage chamber 2 are separated by a partition plate 5.
An opening 6 is provided between the lower end of the partition plate 5 and the bottom of the raw water treatment storage tank 32, and a discharge valve 7 for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank 3, 3 is provided with a siphon pipe 8 for allowing treated raw water to flow out to the filtration tank 4 and adjusting the amount of the treated raw water to be constant, and the discharge valve 7 is engaged with a cylindrical guide plate 9 and a floating body 10, And a stopper 11 that reciprocates depending on the water level.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rainwater purification treatment tank. More specifically, the present invention relates to a rainwater purification treatment tank that separates and removes sediment from rainwater, removes water turbidity, removes contaminants from soil, and reuses rainwater. Since the rainwater can be treated by the natural flow of water using the energy of the water position, it is particularly suitable for the reuse of rainwater in the development of a housing complex on a slope, for example.

[0002]

2. Description of the Related Art Conventionally, in order to mitigate the intensive outflow of rainwater to sewer pipes (rainwater pipes and confluence pipes), measures such as rainwater regulating ponds (tanks) and infiltration of rainwater underground have been taken. These measures for rainwater are to reduce the inflow load of the sewage treatment plant and recharge the groundwater, and effective reuse of rainwater is not included in the target.

For reusing conventional rainwater, "Kokugikan"
There is a case where water is collected on the roof surface (larger is more advantageous) as represented by the rainwater use system described in (1) and used for washing water of toilet after simple treatment.

[0004]

However, according to the conventional rainwater reuse method, there is rainwater treated water at a rainy season (rainy season, etc.) that is not in a water-deficient state, but there is a manufacturable time when there is no water-deficient time. Therefore, there is a problem that rainwater cannot be used for stable reuse by continuously purifying rainwater because the demand does not coincide with the demand.

The present invention solves the above-mentioned problems of the conventional rainwater reuse system, and even if there is a change in the amount of rainfall during rainfall, and not only during rainfall but also after the end of rainfall,
It is an object of the present invention to provide a rainwater purification treatment tank that purifies a regulated amount and reuses a stable amount of rainwater.

[0006]

In order to achieve the above-mentioned object, the present invention provides a raw water treatment system comprising a sedimentation treatment chamber for separating and precipitating sediment of rainwater collected and a storage chamber for storing treated raw water. It comprises a storage tank and a filter tank for filtering the treated raw water discharged from the raw water treatment storage tank, and the precipitation treatment chamber and the storage chamber are separated by a partition plate, and the lower end of the partition plate and the raw water treatment An opening is provided between the bottoms of the storage tanks,
A discharge valve for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank, and a siphon pipe is provided in the raw water treatment storage tank for allowing treated raw water to flow out to the filtration tank and adjusting the outflow amount to a constant level. Is composed of a tubular guide plate and a plug body which is engaged with the floating body, guided in the guide plate, and reciprocates according to the vertical movement of the water level. Here, the rainwater is collected and supplied into the sedimentation treatment chamber, and is prevented from flowing into the storage chamber as much as possible. Therefore, water is poured into or into the precipitation treatment chamber. The term “treated raw water” refers to rainwater obtained by separating sediment from sediment in a raw water treatment storage tank. The partition plate has an opening at the lower end between it and the bottom of the raw water treatment storage tank, but the upper end of the partition plate is between the sedimentation treatment chamber and the storage chamber, and in order to distribute the stored water in the event of a large amount of rainfall, maximum storage is possible. The height may be such that it is buried with respect to the water level. Since the accumulated mud discharge valve discharges the accumulated mud together with water, for example, a guide plate is provided apart from the mud discharge port so that the plug can reciprocate so that it can project from the lower end of the guide plate to the mud discharge port. You may In this case, the accumulated mud is discharged into the mud outlet through the gap between the mud outlet and the guide plate and sent into the mud pipe.

Further, according to the present invention, a raw water treatment storage tank having a sedimentation treatment chamber for separating and precipitating collected sediment of rainwater and a storage chamber for storing treated raw water, and the raw water treatment storage tank is discharged. And a filtration tank for filtering the treated raw water. The precipitation treatment chamber and the storage chamber are separated by a partition plate, and an opening is provided between the lower end of the partition plate and the bottom of the raw water treatment storage tank. , A discharge valve for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank, and a siphon pipe is provided in the raw water treatment storage tank for allowing treated raw water to flow out to the filtration tank and adjusting the outflow amount to a constant value. The valve is composed of a tubular guide plate and a plug body that is engaged with the floating body and guided in the guide plate and reciprocates depending on the vertical direction of the water level.The siphon tube is engaged with the floating body and is located above and below the siphon tube. Equipped with a slide mechanism to guide the displacement of When the raw water treatment storage tank is moved up and down, the siphon pipe is moved up and down to regulate the outflow amount of the treated raw water to a constant level, and when the water level exceeds the maximum storage water level to reach the wash water level, the discharge valve is The rainwater purification treatment tank is characterized in that the plug moves from a state in which the mud outlet is closed to a state in which the mud outlet is opened, and the accumulated mud is discharged from the mud outlet.

According to the present invention, the bottom portion of the raw water treatment storage tank is formed into a hopper shape, and the lower end of the hopper shape is provided with a sludge discharge port, and the partition plate is set so that the discharge port is located on the storage chamber side. It is provided near the treatment chamber, and a multi-tiered inclined plate is provided in the precipitation treatment chamber for promoting the separation and precipitation of the sediment in rainwater. The bottom of the raw water treatment storage tank is formed in a hopper shape so that the sedimentary mud can be easily guided to the discharge port. The reason why the partition plate is provided near the precipitation treatment chamber is to smooth the flow of the raw treated water at the start of discharging the accumulated mud. Further, the multi-tiered inclined plates facilitate separation and sedimentation of the sediment, and the sediment is guided or dropped to the bottom of the tank.

According to the present invention, a plurality of filter media having different filter media diameters can be filled on a support material arranged at the bottom of the filter tank from the upper filter layer to the lower filter media having a large filter media diameter to a small filter media diameter. The reason why the filter media are arranged in this order is to prevent clogging. Here, as a large-sized filter medium, a diameter of 5
The small filter medium has a diameter of 20 mm and a diameter of 1 to 2 mm. As the material, for example, gravel, small pebbles, and filter sand are used.

According to the present invention, the accumulated mud is discharged from the discharge port of the raw water treatment storage tank, and the treated raw water is discharged from the storage chamber to the filtration tank.
The purified treated water can be sent from the filtration layer by natural flow of water without using electric energy or the like.

[0011]

In the rainwater purification treatment tank of the present invention, the sediment content of rainwater collected in the sedimentation treatment chamber of the raw water treatment storage tank is separated and settled, and the treated raw water is stored in the storage chamber. In addition, the outflow valve controls the outflow amount of the treated raw water to the filtration tank, and the discharge valve discharges the accumulated mud at the bottom of the raw water treatment storage tank. The treated raw water having the adjusted outflow amount in the filtration tank is purified.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, an example of a rainwater purification treatment tank of the present invention is shown. The rainwater purification treatment tank comprises a precipitation treatment chamber 1 for separating and precipitating sediments of collected rainwater, and a storage chamber 2 for storing treated raw water. And a raw water treatment storage tank 3, and the raw water treatment storage tank 3
It is composed of a filter tank 4 for filtering the treated raw water flowing out from the tank. The precipitation treatment chamber 1 and the storage chamber 2 are separated by a partition plate 5, and an opening 6 is provided between the lower end of the partition plate 5 and the bottom of the raw water treatment storage tank 3. A discharge valve 7 for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank 3, and a siphon pipe 8 for adjusting the outflow amount of the treated raw water to the filtration tank 4 is provided in the raw water treatment storage tank 3. Here, the discharge valve 7 is composed of a tubular guide plate 9 and a plug body 11 that is engaged with the floating body 10, is guided into the guide plate 9, and reciprocates depending on the vertical direction of the water level. The floating body 10 and the plug body 11 are engaged with each other via a rope 28.

One end of the siphon pipe 8 is provided with a rainwater treatment storage tank 3
The support arm 12 is coupled in the vicinity of the inflow port 30 that is immersed therein, and the floating body 15 is engaged with the support arm 12 via the rope 29. Due to the floating body 15, the siphon tube 8 moves up and down with the fluctuation of the water level. In order to guide the vertical movement, the siphon tube 8 is equipped with a slide mechanism 14 via a support rod 16. As the slide mechanism 14, for example, a vertical rod-shaped sliding metal fitting (not shown) fixed to a support rod 16 on the siphon tube 8 side, and a sliding metal fitting for contacting with and surrounding the sliding metal fitting are stored for rainwater treatment storage. Appropriate measures can be taken, such as fixing and installing in the tank 3. In addition, since rolling of rollers etc. can be substituted for the sliding surface,
In the present invention, the slide mechanism is used to include such a case. The other end of the siphon pipe 8 is an outflow pipe portion 20 of the siphon pipe 8. Due to the siphon principle, the siphon tube 8 filters a fixed amount of treated raw water, which is determined by the cross-sectional area of the siphon tube 8 and the constant water level difference between the water surface and the tip of the outlet 18, regardless of fluctuations in the water level. 4 can be sent.

When the water level exceeds the maximum storage water level and reaches the wash water level, the discharge valve 7 is moved from the state where the plug 11 is fitted into the mud discharge port 17 and the mud discharge port 17 is closed. 17
Is moved to the open state, and the accumulated mud is discharged from the mud discharge port 17 to the mud discharge pipe 19. When the floating body 15 reaches the minimum storage water level,
This is detected by the vertical movement position of the siphon tube 8 using a sensor, the valve provided in the vicinity of the outlet 18 of the siphon tube 8 is closed, and the siphon tube 8 waits in a state where the siphon tube 8 is filled with water. As the water level rises, the valve may be opened to immediately restart the feed of the treated raw water to the filtration tank 4.
In FIG. 1, the amount of water between the maximum storage water level and the maximum storage water level is the amount of water to be purified, and the discharge valve 7 is used at the cleaning water level.
Is fully opened and used as a water head to effectively discharge the accumulated mud. The precipitation treatment tank 1 is provided with a plurality of inclined plates 21.

In the filter tank 4, a 10-mm filter medium 23 and a 1-mm filter medium 24 are laid on a support member 22 made of gravel or small gravel as a material. The water level 25 in the filtration tank 4 is kept as constant as possible, and the purification process is performed. Purified treated water that has been treated is the supply pipe 2
Sent to 6.

[0016]

According to the present invention, the outflow valve provided in the raw water treatment storage tank can regulate the outflow amount of the treated raw water to the filtration tank as constant as possible, and the stable filtration processing can be performed. In addition, the mud accumulated on the bottom of the raw water treatment storage tank can be discharged using the water head.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

[Explanation of symbols]

 1 Precipitation treatment chamber 2 Storage chamber 3 Raw water treatment storage tank 4 Filtration tank 5 Partition plate 6 Opening 7 Discharge valve 8 Siphon tube 9 Guide plate 10 Floating body 11 Plug body 12 Support arm 13 Support tool 14 Sliding mechanism 15 Floating body 16 Support rod 17 Sludge outlet 18 Outlet 19 Sludge pipe 20 Outflow pipe section 21 Sloping plate 22 Support material 23 Filter medium 24 Filter medium 25 Water level 26 Feed pipe 27 Hopper 28 Rope 29 Rope 30 Inlet

Claims (5)

[Claims] 1. A raw water treatment storage tank comprising a settling treatment chamber for separating and precipitating sediments of collected rainwater and a storage chamber for storing treated raw water, and treated raw water discharged from the raw water treatment storage tank. It comprises a filtration tank for filtration treatment, and the precipitation treatment chamber and the storage chamber are separated by a partition plate, and an opening is provided between the lower end of the partition plate and the bottom of the raw water treatment storage tank.
A discharge valve for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank, and a siphon pipe is provided in the raw water treatment storage tank for allowing treated raw water to flow out to the filtration tank and adjusting the outflow amount to a constant level. Is a tubular guide plate and a plug body that is engaged with a floating body, guided in the guide plate, and reciprocates depending on the vertical direction of the water level. 2. A raw water treatment storage tank comprising a settling treatment chamber for separating and precipitating the sediment of the collected rainwater and a storage chamber for storing the treated raw water, and the treated raw water discharged from the raw water treatment storage tank. It comprises a filtration tank for filtration treatment, and the precipitation treatment chamber and the storage chamber are separated by a partition plate, and an opening is provided between the lower end of the partition plate and the bottom of the raw water treatment storage tank.
A discharge valve for discharging accumulated mud is provided at the bottom of the raw water treatment storage tank, and a siphon pipe is provided in the raw water treatment storage tank for allowing treated raw water to flow out to the filtration tank and adjusting the outflow amount to a constant level. Is a tubular guide plate and a plug body that is engaged with the floating body and guided in the guide plate and reciprocates depending on the vertical direction of the water level.The siphon tube is engaged with the floating body and is located above and below the siphon tube. A slide mechanism for guiding the displacement is provided, and the outflow amount of the treated raw water is adjusted to be constant by moving the siphon pipe up and down according to the fluctuation of the water level of the raw water treatment storage tank.
When the water level exceeds the maximum storage water level and reaches the wash water level,
The rainwater purification treatment tank is characterized in that the discharge valve moves from a state in which the plug has closed the mud discharge port to a state in which the mud discharge port is opened, and discharges the accumulated mud from the mud discharge port. 3. A sedimentation treatment chamber in which a bottom portion of the raw water treatment storage tank is formed into a hopper shape, and a bottom of the hopper shape is provided with a sludge discharge port, and a partition plate is located so that the discharge port is located on the storage chamber side. The rainwater purification treatment tank according to claim 1 or 2, wherein the rainwater purification treatment tank is provided close to the precipitation treatment chamber, and a multi-tiered inclined plate is provided in the precipitation treatment chamber to accelerate the separation and precipitation of sediment in rainwater. 4. The method according to claim 1, wherein a plurality of filter media having different filter media diameters are filled on a support material disposed at the bottom of the filter tank from an upper layer to a lower layer having a large filter media diameter to a small filter media diameter. The rainwater purification treatment tank described in 3. 5. A natural flow of water for discharging the accumulated mud from the discharge port of the raw water treatment storage tank, flowing out the treated raw water from the storage chamber to the filter tank, and sending the purified treated water from the filter layer. The rainwater purification treatment tank according to any one of claims 1 to 4.