JP4598143B1 - Domestic water reuse system - Google Patents

Abstract

The present invention provides a water reuse system suitable for reusing water used once as toilet water even in a large-scale building where many people gather like a business hotel.
Living water used in each floor of a multi-storey building, each room bath, washstand, etc. is collected in a separation tank 14 to separate impurities, and treated water from which impurities are separated is used as toilet cleaning water. It is a system to be reused, and microbubbles for impurities such as sebum, oil, hair, solids, etc. from the collection pipe 12 connected to the separation tank 14 from drain pipes such as baths and washstands, and the collected domestic water Separation tank 14 that floats and processes using bubbles of generator 28, water receiving tank 16 that stores treated water treated with impurities from separation tank 14, and guide pipe 24 that delivers treated water And an elevated water tank for storing treated water, and a toilet outlet pipe for guiding the treated water stored in the elevated water tank to the toilet on each floor as cleaning water.
[Selection] Figure 2

Description

  The present invention relates to a reuse system for reusing domestic water used in buildings, hotels and the like as toilet cleaning water.

  In general, tap water is used for domestic water used for baths, toilets, laundry, etc., and after use, the water is drained into the sewer as it is. However, it is not preferable that water is allowed to flow into the sewer as it is only once, from the viewpoint of water resources and from the economical viewpoint.

  Therefore, various systems for reusing domestic water after use have been proposed. For example, in patent document 1, the treated water which carried out the purification process is stored in a small treated water storage tank, and the treated water is used as miscellaneous water, such as toilet washing water, a car wash, and watering.

  Although the reuse system of Patent Document 1 is suitable for a small-scale house, it is difficult to apply it to a building where many people gather, for example, a business hotel. That is, in Patent Document 1, a screen having eye holes of about 1 to 2 mm is used, and clogging occurs when trying to remove hair, sebum, etc. generated from a commercial facility such as a business hotel where many people gather. In order to maintain a good state, frequent management is required and a large amount of cost is required.

In addition, multi-storey buildings such as business hotels have a situation in which the amount of water used for baths, washstands, showers, etc. becomes extremely large within a specific time zone such as morning and evening.
In addition, the domestic water discharged | emitted from such a multi-story building contains many specific impurities, such as sebum, hair, and shampoo.

JP-A-9-174072

  In view of such a situation, the present invention reuses once-used water for toilet cleaning at an economical cost even in a multi-storey building where many people gather, such as a business hotel. It is an object of the present invention to provide a system for reusing domestic water that is suitable for this purpose.

The reuse system for domestic water according to the present invention is:
Household water used to collect domestic water used in each floor of a multi-storey building, each room's bath, wash basin, etc., separate impurities, and reuse the treated water from which the impurities have been separated as toilet cleaning water Re-use system,
A pipe for collecting water that is connected to drainage pipes such as baths and washstands in each room of the multi-story building , and that collects and feeds domestic water drained from the drainage pipes;
Using bubbles with a diameter of 10 μm to 100 μm that are connected to the collecting pipe and generate impurities such as sebum, oil, hair, solids, etc. from the water for daily life collected through the collecting pipe from a microbubble generator A separation tank that floats and processes,
A water receiving tank for deriving and storing treated water in which the impurities are treated by bubbles of the microbubble generator;
Piping for guiding the treated water stored in the water receiving tank;
An elevated water tank for storing the treated water sent from the water receiving tank via the guide pipe;
A toilet outlet pipe for guiding the treated water stored in the elevated water tank to the toilet on each floor as cleaning water is provided.

According to the reuse system having such a configuration, domestic water can be used repeatedly without being thrown away at one time, and it is effective in terms of water resources and is economically inexpensive.
Here, it is preferable to provide a biological filtration tank and / or an activated carbon tank between the separation tank and the water receiving tank.

With such a configuration, it is possible to effectively remove odors, surfactants and the like contained in domestic water.
Furthermore, in the present invention, it is preferable to connect a chlorine sterilization liquid supply pipe to the guide pipe.

Furthermore, in the present invention, it is preferable that a supply pipe for replenishing city water is connected to the elevated water tank when the amount of water stored in the elevated water tank becomes a predetermined amount or less.
With such a configuration, even when the amount of treated water stored in the elevated water tank is reduced, toilet flush water can be reliably supplied.

  Furthermore, in the present invention, among the separation tank and the water receiving tank, at least the separation tank is provided with an impurity discharger for discharging impurities separated by bubbles of the microbubble generator to the outside. It is preferable.

  With such a configuration, impurities separated in the separation tank can be reliably discharged to the outside.

  According to the reuse system for domestic water according to the present invention, for example, even in a large-scale multi-storey building represented by a business hotel, the domestic water used in each floor and each room is discarded as it is. Instead, it can be reused as toilet wash water at a low cost. Moreover, frequent management is unnecessary, and maintenance management costs can be reduced.

FIG. 1 is a schematic diagram of a multi-storey building in which a system for reusing domestic water according to an embodiment of the present invention is constructed. FIG. 2 is an enlarged view showing a piping path in the vicinity of the microbubble generator provided between the separation tank and the water receiving tank shown in FIG. FIG. 3 shows a system for reusing domestic water according to another embodiment of the present invention. In particular, FIG. 3 is a cross-sectional view of a main part when a separation tank and a water receiving tank are provided separately.

  FIG. 1 is a schematic diagram showing a flow of domestic water in a multi-storey building equipped with a system for reusing domestic water according to an embodiment of the present invention, specifically a schematic diagram when applied to a business hotel. is there.

  In general, a facility such as a business hotel has a plurality of rooms on each floor, but FIG. 1 illustrates a three-story business hotel in order to simplify the explanation. . There will be one room on each floor.

  In a multi-storey building 2 such as a business hotel, the structure of the water around each floor and each room is formed in substantially the same way, and each of the rooms A, B and C on each floor has a wash basin 4, a bath 6 and a toilet 8 It is equipped.

Then, these water-related devices except the toilet 8, that is, the drainage pipes 4a and 6a in the wash basin 4 and the bath 6, are connected to the collecting pipe 12.
The collecting pipe 12 is used to guide the domestic water used in the rooms A, B, and C on each floor to the separation tank 14 installed on the first floor or the basement by natural fall, and a large-diameter pipe is used. ing.

  In the present invention, when the domestic water used in the rooms A, B, and C on each floor is fed to the separation tank 14, it can be pumped by a pump, but it is most preferable to feed water by natural fall. If water is supplied by natural fall in this way, the use of expensive parts such as pumps and valves can be reduced, and the cost required for maintenance can be minimized.

  Therefore, in the present embodiment, if the separation tank 14 and the water receiving tank 16 are provided on the basement, water from all the rooms from the first floor to the top floor can be collected by natural fall. In this way, if water for domestic use is sent by natural fall as much as possible, it is possible to reduce the use of pumps for pumping, valves, and filters attached to these as much as possible even in business hotels where many people gather. This makes it possible to keep the cost for system construction low.

At the same time, if the water supply falls naturally, it is possible to reduce the number of places where impurities contained in domestic water are clogged, which contributes to a reduction in maintenance costs.
On the other hand, a water receiving tank 16 is provided in the vicinity of the separation tank 14, and treated water in which impurities are treated in the separation tank 14 is stored in the water receiving tank 16. The separation tank 14 and the water receiving tank 16 are connected via a pipe 18. The pipe 18 may be provided with a pump for pumping (not shown).

  Furthermore, in this embodiment, a pump 22 is installed downstream of the water receiving tank 16 as necessary. And the treated water stored in the water receiving tank 16 is guided to the rooftop of the building 2, for example, via the guide pipe 24 by the pump 22, and stored in the elevated water tank 26 arranged on the rooftop. . In addition, if a chlorine sterilization liquid supply pipe (not shown) is connected to the guide pipe 24 and a chlorine sterilization liquid is supplied, germs contained in the treated water can be reliably treated.

  As shown in an enlarged view in FIG. 2, a microbubble generator 28 is connected to the separation tank 14. In the microbubble generator 28, for example, as will be described later, bubbles generated by using the treated water in the water receiving tank 16 are introduced into the separation tank 14, and the action of the bubbles causes the main bubbles in the separation tank 14. Impurities are separated.

  In this embodiment, bubbles are introduced into the separation tank 14 using the treated water in the water receiving tank 16, but instead, a part of the stored water in the separation tank 14 is used as a microbubble generator. The water supplied to the microbubble generator 28 may be returned to the separation tank 14 again.

  The diameter of the bubbles generated by the microbubble generator 28 is, for example, in the range of 10 μm to 100 μm. If bubbles having such a diameter are supplied into the separation tank 14, the negatively charged bubbles are adsorbed by impurities such as sebum and hair contained in domestic water due to the adsorption action of the bubbles. As a result, impurities such as sebum and hair that frequently occur in business hotels can be promptly levitated and separated by the buoyancy of the bubbles. Of the impurities generated in business hotels, the hair is the most difficult impurity to float, but the average diameter of the hair is approximately 70 to 80 μm. However, if the bubbles generated by the microbubble generator 28 are used, even the most difficult-to-float hair having such a size can be effectively lifted.

Impurities separated and floated in the separation tank 14 are discharged to the outside by the float 30 through an impurity discharger 32 arranged so as to be vertically movable along the water surface.
In the water receiving tank 16, as in the case of the separation tank 14, an impurity discharger 32 that can move up and down along the water surface is preferably installed. However, the impurity discharger 32 in the water receiving tank 16 is not essential and may be omitted.

  In this embodiment, the water receiving tank 16 and the separation tank 14 are partitioned by the partition wall 17 and formed integrally. In the separation tank 14, a spillway 34 that leads to sewage is provided at a level lower than the height of the top end 17 a of the partition wall 17 of the separation tank 14. The height of the top end 17 a of the partition wall 17 is lower than the top end heights of the other walls constituting the water receiving tank 16.

  Therefore, the water receiving tank 16 and the separation tank 14 communicate with each other at a position higher than the stagnation mouth portion 34 a of the spillway 34. Since the water receiving tank 16 and the separation tank 14 communicate with each other at such a height, for example, even when the water level of the water receiving tank 16 is significantly higher than usual, such as in the morning and evening hours. Since the treated water does not overflow from the water receiving tank 16 and overflows the top end 17a of the partition wall 17 and flows into the separation tank 14, the treated water can be effectively used without wasting it. it can.

  Further, since the separation tank 14 is provided with a spillway 34 leading to the sewage at a level lower than the height of the top end 17a of the partition wall 17, the water level of the separation tank 14 has risen beyond a predetermined amount. Even if it is a case, before the water level of the separation tank 14 exceeds the height of the top end 17a of the partition wall 17, it is drained into the sewage from the throat portion 34a of the spillway 34. Therefore, untreated water does not flow from the separation tank 14 to the water receiving tank 16.

  On the other hand, it is preferable to install a biological filtration device 36 and an activated carbon filtration device 38 in the pipe 18 for sending treated water from the separation tank 14 to the water receiving tank 16. By interposing the biological filtration device 36, for example, odors such as organic substances contained in the treated water treated in the separation tank 14 are removed. Further, by interposing the activated carbon filtration device 38, a surfactant or the like that causes turbidity in the treated water is removed.

  In addition, in the said Example, although both the biological filtration apparatus 36 and the activated carbon filtration apparatus 38 are provided, if these ability is improved, if only either one is provided, it is also possible to give both functions. It is.

  A pipe 40 is connected to the bottom of the water receiving tank 16 to supply a certain amount of treated water supplied into the water receiving tank 16 into the separation tank 14 via the microbubble generator 28. A filter 42 and a pump 44 are interposed in the middle of the return pipe 40, and fine bubbles generated by the microbubble generator 28 are supplied to the separation tank 14 by treated water sent from the pipe 40 by the pump 44. ing. As described above, when water from the separation tank 14 is used for the microbubble generator 28 instead of the water receiving tank 16, the pipe 40 may be connected to the lower part of the separation tank 14 or the like.

  However, if the treated water in the water receiving tank 16 is used for the microbubble generator 28, the filter 42 can be omitted because there are few impurities. Furthermore, since there is less possibility of the pump 44 being clogged, there is an advantage that the number of times of cleaning and inspection of the pump 44 can be reduced.

  Furthermore, in this embodiment, as shown in FIG. 1, for example, when the treated water stored in the elevated water tank 26 installed on the roof falls below a predetermined amount, A supply pipe 49 for city water 46 is connected. The city water 46 is automatically supplied by starting the water amount automatic backup system 47 when the water level in the elevated water tank 26 becomes a predetermined value or less.

In addition, the space between the elevated water tank 26 arranged on the roof and the toilet 8 on each floor is connected by a toilet outlet piping 48.
By these toilet derivation pipes 48, in each toilet 8, cleaning water is provided by treated water stored in the elevated water tank 26.

The regeneration system for reusing domestic water according to an embodiment of the present invention is configured as described above. The operation will be described below.
Now, city water, that is, tap water, is used as it is in the wash basin 4 and bath 6 in the rooms A, B, and C on each floor. On the other hand, in this embodiment, the water for cleaning used in the toilet 8 is the water for daily use treated by the reuse system of this embodiment.

That is, the domestic water used in the wash basin 4 and the bath 6 on each floor is sent to the collecting pipe 12 through the discharge pipes 4 a and 6 a by natural fall and introduced into the separation tank 14.
The living water collected from the rooms A, B, and C through the collecting pipe 12 in the separation tank 14 is mixed with impurities such as sebum, oil, hair, solids, etc. It is introduced into the separation tank 14 with the falling water supply. On the other hand, in the separation tank 14, bubbles of a predetermined size are continuously supplied by the microbubble generator 28 as shown in FIG. 2. As a result, in the separation tank 14, main impurities such as sebum, oil, and hair float with the bubbles and are collected near the water surface. The impurities collected near the water surface are discharged to the outside through the impurity discharger 32 in the separation tank 14.

  On the other hand, the treated water after the impurities are separated and removed in the separation tank 14 is further removed of odors and surfactants via the biological filtration device 36 and the activated carbon filtration device 38 on the downstream side, and is connected via the pipe 18. And collected in the water receiving tank 16.

  In the water receiving tank 16, the water level gradually rises due to the treated water sequentially supplied through the pipe 18. At this time, as in the case of the separation tank 14, if the impurity discharger 32 is provided in advance in the water receiving tank 16, the impurities discharged in the water receiving tank 16 due to the treated water are removed from the impurity discharger 32. It can also be discharged to the outside. However, in the water receiving tank 16, the impurity discharger 32 can be omitted as described above because there is little mixing of impurities.

  When a sensor or the like detects that the water level in the elevated water tank 26 or the water level in the water receiving tank 16 has reached a predetermined level, the pump 22 starts to be driven, and the treated water stored in the water receiving tank 16 is stored. Is supplied to the elevated water tank 26 on the roof via the guide pipe 24 by the output of the pump 22. Thereby, treated water is gradually stored in the elevated water tank 26 on the roof.

In this state, when there is a demand for cleaning water from the toilet 8 on each floor, domestic water stored in the elevated water tank 26 is released to the toilet 8 by natural fall.
In addition, when there is a possibility that the water stored in the water receiving tank 16 exceeds a certain amount and overflows in the water receiving tank 16, the spillway 34 provided in the separation tank 14 is provided via a stagnation mouth 34 a. Returned to sewage. That is, when the water level in the water receiving tank 16 exceeds the uppermost level of the partition wall 17, the surplus flows into the separation tank 14 and is drained into the sewage through the throat portion 34 a of the spillway 34.

In the present embodiment, the water used in the multi-story building 2 can be reused as toilet cleaning water by performing the flow and circulation of water as described above.
As described in the above embodiments, in the present invention, it is possible to supply domestic water by natural fall utilizing the fact that it is a multi-story building, so that the use of pumping means such as a pump can be limited as much as possible. . In addition to this, it is possible to reduce the number of accompanying members such as a filter, thereby reducing the cost required for maintenance.

  Moreover, in business hotels established in various places, the impurities contained in water for daily use are almost constant regardless of the building, and sebum, hair, shampoo, etc. make the reuse system of the present invention effective. Can be applied.

As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example at all.
For example, in the above embodiment, the separation tank 14 and the water receiving tank 16 are integrally provided and the tanks 17 are partitioned by the partition wall 17, but as in the other embodiments shown in FIG. The water receiving tank 16 can be provided separately in advance.

  In the case where the separation tank 14 and the water receiving tank 16 are provided separately, a communication pipe 50 is provided between the separation tank 14 and the water receiving tank 16 at a position higher than the stagnation mouth portion 34a of the spillway 34 in the separation tank 14. You can communicate with each other.

  Even with such a structure, when the amount of water stored in the separation tank 14 exceeds a predetermined amount, the excess amount can be discharged into the sewage through the spillway 34. Further, if the treated water in the water receiving tank 16 exceeds the predetermined amount and reaches the level of the communication pipe 50, the increased amount of treated water can be returned to the separation tank 14 again.

  Moreover, the output of the pump 22, the pump 44, the capacity | capacitance of the separation tank 14, the water receiving tank 16, the elevated water tank 26, etc. can be adjusted suitably. Moreover, the start of circulation of treated water, the control of driving of the pumps 22 and 44, etc. are not particularly limited. Further, the installation positions of the pumps 22, 44, etc. are not limited to the embodiments. Further, the pumps 22, 44, etc. may be continued for a predetermined time by a timer, or may be stopped when there is no movement of water.

Moreover, although the business hotel was illustrated as the multi-storey building 2 in the said Example, it is not limited to this, It can apply also to an apartment etc.
Furthermore, in the domestic water reuse system according to the above embodiment, since the separation tank 14 and the water receiving tank 16 are installed on the first floor, for example, the domestic water discharged from the room A on the first floor is naturally dropped into the separation tank 14. In some cases, it may be difficult to introduce it. In that case, the domestic water discharged from the room A on the first floor may be directly discharged into the sewage without passing through the separation tank 14.

  In this way, when it is difficult to collect domestic water from some rooms such as room A on the first floor, it is more economical to discharge it into sewage as it is rather than to collect a new pump. In some cases. Therefore, the economical operation and management of the system can be changed as appropriate according to the location conditions.

  Further, in the above embodiment, the collecting pipe 12 is connected to the upper part of the separation tank 14, and the entire amount of domestic water collected through the collecting pipe 12 is directly poured into the separation tank 14. The connecting position of the collecting pipe 12 is not limited to the upper part of the separation tank 14. For example, as indicated by phantom lines in FIG. 2, the collecting pipe 12 (or the collecting pipe 12 connected to the upper part of the separating tank 14 is disposed in the middle of the pipe 52 extending from the microbubble generator 28 to the lower part of the separating tank 14. Branch pipe 12 ′) branching from the pipe, and the total amount (or a part thereof) of domestic water collected via the collecting pipe 12 may be poured into the separation tank 14 via the pipe 52, It can be changed as appropriate according to the location conditions.

2 Multi-story Building 4 Wash Basin 6 Bath 8 Toilet 12 Collecting Pipe 12 'Branch Pipe 14 Separation Tank 16 Receiving Tank 18 Piping 22 Pump 24 Guide Piping 26 Elevated Water Tank 28 Micro Bubble Generator 32 Impurity Ejector 34 Excess Water Discharge 34a Mouth part 36 Biological filtration device 38 Activated carbon filtration device 40 Return pipe 49 Supply pipe 50 Communication pipe 52 Pipe

Claims (4)

Each floor of a hotel that is a multi-storey building, each room, a bathroom except for a toilet, a bathroom, a wash basin, etc. collects domestic water used to separate impurities, and the treated water from which the impurities have been separated is used as toilet cleaning water A system for reusing domestic water for reuse,
The multi-storey building is connected to a drain pipe such as a bathroom and a wash basin except for a toilet in each room of the hotel , and a collecting pipe that collects and sends the domestic water drained from the drain pipe,
Using bubbles having a diameter of 10 μm to 100 μm that are connected to the collecting pipe and generate impurities such as sebum, oil, hair, solids, etc. from the water for daily life collected through the collecting pipe from a microbubble generator A separation tank that floats and processes,
A water receiving tank for deriving and storing treated water in which the impurities are treated by bubbles of the microbubble generator;
Piping for guiding the treated water stored in the water receiving tank;
An elevated water tank for storing the treated water sent from the water receiving tank via the guide pipe;
Wherein the elevated tank to the treated water stored, comprising a pipe and toilet outlet for guiding the washing water to the floor of the toilet Rutotomoni,
Among the separation tank and the water receiving tank, at least the separation tank can be vertically moved along the water surface by a float for discharging impurities separated by bubbles of the microbubble generator to the outside by natural fall. A reuse system for domestic water, characterized in that it is equipped with an arranged impurity discharger.   The living water reuse system according to claim 1, wherein a biological filtration tank and / or an activated carbon tank is provided between the separation tank and the water receiving tank.   The reuse system for domestic water according to claim 1, wherein a chlorine sterilization liquid supply pipe is connected to the guide pipe.   The supply pipe for replenishing city water when the water stored in the elevated water tank becomes a predetermined amount or less is connected to the elevated water tank. The water reuse system according to any one of the above.

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