JP2001062475A - Water treating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the improvement of the stability of a water treating system and the efficiency, reduction of the cost and maintenance expenses, to perform miniaturization, etc., and further to enhance the degree of freedom in the operation of the system without increasing the number of the system components. SOLUTION: This system is provided with plural treating tanks 10, 40 and 50, an air supply means 60 for supplying the air used in the treatment in the tanks and transfer between the tanks, an air passage switching means 70 provided with air outlets H1 to H6 switchable to one another for each use including 2 outlets H5 and H6 communicable with one air inlet H0 for receiving the air sent from the supply means at the same time, a pipeline connecting the respective air outlets to the respective treating tanks and a control means for controlling the swithcing means 70 in the predetermined timing and supplying the air necessary for each use.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment system having a plurality of treatment tanks for treating, for example, wastewater containing pulverized garbage from a disposer of a sink.
In particular, the present invention relates to an improvement in an air supply mechanism used for processing (promoting aeration and sedimentation) in each processing tank and transferring (air lift) between the processing tanks.

[0002]

2. Description of the Related Art In this type of water treatment system, a blower (air pump) for supplying air to a plurality of uses such as aeration, air lift, and sedimentation is used.

[0003] In this case, since the supply time and supply amount of air differ for each application, a blower is provided for each application.

[0004] For example, in a water treatment system for treating wastewater containing garbage pulverized material (solid content) from a disposer, the wastewater containing garbage pulverized material from the disposer is temporarily stored in a flow rate adjusting tank, and The sediment is put into a solid-liquid separator by an air lift to separate it into solid and liquid components. The liquid component is returned to the flow control tank, and the solid component is put into a compost (composting) device and subjected to organic matter decomposition treatment by microorganisms. Compost. The supernatant of the flow control tank is transferred to an aeration tank by an air lift, and an organic component is decomposed by microorganisms by aeration. Then, the supernatant of the aeration tank is allowed to flow naturally into the sedimentation / separation tank to precipitate sludge, and the supernatant is discharged to the sewer, and the precipitated sludge is returned to the first-stage flow control tank by an air lift. Thus, various treatment tanks are used in this type of water treatment system.

[0005] In this case, in order to improve the treatment performance of the drainage from the disposer, a blower for aeration in a general aeration tank, a blower for air-lifting the supernatant of the flow control tank to the aeration tank, and a flow control tank Blower for air-lifting the sediment of the sediment to the solid-liquid separation device, blower for air-lifting (returning) the sediment in the sedimentation separation tank to the flow control tank, 6 such as a blower and a blower for aeration for accelerating sedimentation in the sedimentation separation tank.
One blower is conceivable.

[0006]

In the conventional water treatment system as described above, the time, flow rate and pressure required for aeration and air lift differ depending on the system configuration. Therefore, a plurality of blowers (air pumps) corresponding to the system are required. However, there is a problem that the cost is increased and the system is increased in size. Also, relatively inexpensive diaphragm pumps are used as blowers, but the diaphragm pumps are consumables whose internal diaphragms need to be replaced approximately every five years, so the maintenance cost increases as the number of units increases. . Also, if you have multiple blowers,
Naturally, noise and vibration increase, power consumption increases, and electricity costs increase.

[0007] Further, when a plurality of blowers are individually controlled to perform various processes independently, a problem occurs due to the interference of each. For example, the raw water flowing from the disposer into the flow control tank is mixed with a solid component and a liquid component, and a certain time or more is required to separate the solid component and the liquid component. Also, in order to prevent activated sludge from undergoing maintenance, which is very difficult to maintain, it is necessary to air lift only the supernatant of the flow control tank so that sludge and solids are not mixed. However, if the air lift of the sediment is performed before the air lift of the supernatant liquid in the flow rate adjustment tank, the interface of the sediment is disturbed and sludge and solids are soared, mixed into the air lift of the supernatant liquid and flow into the aeration tank. To make it easier
Water treatment performance will be reduced.

Incidentally, Japanese Patent Application Laid-Open No. 6-92455 (B6
In 5G 53/56), a plurality of powder fluid inlets and outlets are provided on the cylindrical peripheral wall of the casing at intervals in the circumferential direction, and a rotating body is provided with a pipe for connecting the two inlets and outlets. A valve is disclosed. It is conceivable to apply this to the water treatment system according to the present invention, but in the above-mentioned publication, both the entrance and the exit are formed in the circumferential direction, and the inlet of the rotating body also moves in the circumferential direction. The number is limited to two, and if it is more than two, the structure and control are considered to be considerably complicated, so that it is not suitable for the water treatment system according to the present invention.

Further, even if the number of branches can be ensured for each application, if the number of branches is changed sequentially, the degree of freedom of the system operation is limited. For example, in the water treatment system as described above, it is desirable that the aeration of the aeration tank be stopped for a short time and be performed continuously if possible. The effect of the aeration stop time on the microbial treatment cannot be ignored.
In addition, it is conceivable to provide a blower or a branch member dedicated to the aeration of the aeration tank, but the number of system components increases accordingly.

Accordingly, the present invention has been made to solve such a problem, and it is possible to improve the stability and performance of a water treatment system by using a simple air flow path switching means.
It is an object of the present invention to achieve cost reduction, reduction of maintenance cost, miniaturization, and the like, and to realize improvement of the degree of freedom of system operation without increasing the number of system components.

[0011]

In order to achieve the above object, the present invention provides a plurality of treatment tanks for performing various treatments on water to be treated, a treatment in each of the treatment tanks, and a treatment tank between the treatment tanks. Air supply means for supplying air used for various purposes such as transfer, and two or more air outlets which can be simultaneously communicated with one air inlet into which air sent from the air supply means flows. An air flow path switching means including a plurality of air outlets capable of switching control for each application, a pipe connecting the air flow outlets of the air flow path switching means to the respective processing tanks, Control means for controlling the road switching means at a predetermined timing and supplying air required for each application.

Further, the air flow path switching means has an air inlet in the direction of the rotation axis, and has two or more air outlets communicating with the air inlet in the circumferential direction and is driven to rotate. A rotor and an air outlet which rotatably accommodates the rotor and has an air inlet in the direction of its axis of rotation, and which can communicate simultaneously with two or more air outlets of the rotor in the circumferential direction. And a housing having a plurality of air outlets.

Further, the respective sliding contact surfaces, on which the air outlet of the rotor and the air outlet of the housing are formed, are formed as conical surfaces, and the conical surface of the rotor and the conical surface of the housing are pressed against each other. Is provided with a biasing means for biasing as described above.

Further, the air flow path switching means has a housing in which an inner surface on one side is formed flat, an air inlet is formed in the center of the flat surface, and a plurality of air outlets are formed around the air inlet. And one side is formed rotatably in the housing and one side is formed flat, and the flat surface is closely contacted with the flat surface of the housing, and the flat surface is provided with the air inlet of the housing and two or more air And a rotor which is formed with a communicating portion capable of communicating with the outlet at the same time and is driven to rotate.

[0015] Further, an air outlet which is always in communication with an air inlet into which the air sent from the air supply means flows is provided as the air outlet which can be simultaneously communicated.

Further, the control means stops the supply of air from the air supply means when the rotor rotates.

Further, a check valve is provided between an air outlet for discharging air for aerating the water to be treated and a diffuser pipe connected to the air outlet by a pipe for diffusing air into the water to be treated. It is characterized by having.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system configuration diagram showing an embodiment of a water treatment system for purifying wastewater from a disposer and discharging the wastewater to a sewerage system. The air from one blower is switched to six flow paths for use. Is what you do. The pipes shown by solid lines show the flow of the liquid (solid-liquid mixture), and the pipes shown by broken lines show the flow of air.

In this water treatment system, wastewater containing garbage pulverized material from a disposer (not shown) is temporarily stored in a flow control tank 10, and the sediment is transferred to a solid-liquid separator 20 by an air lift pump (pipe) 11. The liquid is separated into a solid component and a liquid component, and the liquid component is returned to the flow rate adjusting tank 10. The solid component is supplied to a compost (composting) device 30 to be composted by an organic matter decomposition treatment using microorganisms. . The supernatant of the flow control tank 10 is transferred to an aeration tank 40 by an air lift pump (pipe) 12 to decompose organic components by microorganisms by aeration treatment. Then, the supernatant of the aeration tank 40 is allowed to flow naturally into a settling / separation tank 50 communicating with the upper part to precipitate sludge, and the supernatant is discharged to a sewer, and the settled sludge is removed by an air lift pump (pipe).
At 51, it is returned to the flow control tank 10 at the first stage. In addition, a partition plate 52 is provided on the upper part of the sedimentation separation tank 50 to prevent the treated water containing the sludge from flowing directly from the aeration tank 40 to the sewer even when the water is full.

In this water treatment system, one blower (air pump) 60 is used.
The air is supplied to the flow control tank 10, the aeration tank 40, and the sedimentation separation tank 50 via an air flow path switching device 70 that switches between two flow paths. The blower 60 is a diaphragm pump similar to the conventional one. The capacity of the blower 60 may be the maximum capacity of the conventional one. As described above, the diaphragm pump has to replace the diaphragm in about five years. However, since the replacement is performed only for one unit, the cost can be reduced by reducing the number of units and the maintenance cost can be reduced. In addition, since only one blower 60 is required, noise and vibration can be reduced, power consumption is reduced, and electricity bill is also reduced.

FIG. 2 is a view showing the basic configuration and operation of the air flow switching device 70. This air flow switching device 7
Reference numeral 0 denotes a rotor 71 having an air inlet R0 in the direction of the rotation axis and having two air outlets R1 and R2 communicating with the air inlet R0 in a circumferential direction, and the rotor 71 being rotatable. Housed and have an air inlet H0 in the direction of its rotation axis,
A housing 72 having six air outlets H1 to H6 including air outlets H5 and H6 communicating simultaneously with the two air outlets R1 and R2 of the rotor 71 in the circumferential direction;
And a motor (not shown) for driving the rotor 71 via the motor 3.

The six air outlets H1 to H6 of the air flow switching device 70 are adjusted in flow rate for each application as described later, and are arranged and formed as shown in FIG.
The piping is as shown in FIG. That is, an air pipe 81 shown by a broken line is connected to the first air outlet H1,
The tip of the air pipe 81 is connected to the bottom of the aeration tank 40, and is connected to a diffuser 81a.

An air pipe 82 is connected to the second air outlet H 2, and the tip of the air pipe 82 is connected to a lower part of an air lift pump (pipe) 12 for air lifting the supernatant of the flow control tank 10.

An air pipe 83 is connected to the third air outlet H3, and the tip of the air pipe 83 is connected to the lower part of an air lift pump (pipe) 11 for air lifting the sediment in the flow rate adjusting tank 10.

An air pipe 84 is connected to the fourth air outlet H4, and the tip of the air pipe 84 is connected to the lower part of an air lift pump (pipe) 51 for air lifting the sediment in the sedimentation separation tank 50.

An air pipe 85 is connected to a fifth air outlet H5 formed between the air outlets H3 and H4.
And a diffuser pipe 85a is connected to the lower part of the pipe.

An air pipe 86 is connected to the sixth air outlet H6, and the tip of the air pipe 86 is connected to a lower part of the sedimentation tank 50, and is connected to an air diffuser 86a.

Of the air pipes 81 to 86, the air pipes 81 to which the air diffusers 81a, 85a and 86a are connected,
A check valve 90 is attached to each of the parts 85 and 86.

Although not shown, a control unit comprising a microcomputer (hereinafter abbreviated as "microcomputer") for controlling the entire water treatment system and an operation display unit for displaying the status of various operations and abnormalities. The blower 60 and the air flow path switching device 70 described above are also controlled by the control unit.

Next, the operation of the water treatment system thus configured will be described with reference to the flowchart of FIG. 3 and the timing chart of FIG.

Switching of the air flow path from the blower 60 by the air flow path switching device 70 is performed in the following order according to the timing chart shown in FIG. 4, and this is repeated at a substantially constant cycle (for example, about 30 minutes). 1 Aeration of the aeration tank 40 (for example, 30 minutes) 2 Airlift of the supernatant of the flow rate adjustment tank 10 to the aeration tank 40 (depending on the water level, for example, several tens to hundreds of seconds) 3 Solid-liquid separation of the precipitate in the flow rate adjustment tank 10 4. Air lift (depending on water level, for example, several seconds to several tens of seconds) to apparatus 20. 4. Air lift of sediment in sedimentation separation tank 50 to flow control tank 10 (depending on water level, for example, several seconds to several tens of seconds). Aeration (for example, several seconds to one hundred and several tens of seconds) Aeration for promoting precipitation in the precipitation separation tank 50 (for example, several seconds to one hundred and several tens of seconds)

That is, first, the air flow path switching device 70 is set to the state shown in FIG. 2A, and the aeration of the aeration tank 40, which is the most important main in water treatment, is performed for a set time (for example, 30 minutes).
(Step 101 in FIG. 3). Here, the water to be treated is purified by the aerobic microorganisms.

Next, the air flow switching device 70 is shown in FIG.
And the supernatant of the flow control tank 10 is air-lifted to the aeration tank 40 (process 102). Since the flow regulating tank 10 is separated into a supernatant and a sediment during the aeration treatment in the aeration tank 40 (30 minutes), only the supernatant is sent to the aeration tank 40. The microcomputer constituting the control means of the present system is controlled based on the output of a water level sensor (not shown) of the flow rate adjustment tank 10 so that the air lift time is constant regardless of the water level of the flow rate adjustment tank 10 so that the amount of one transfer is constant. The determination is made with reference to the air lift time table stored in the memory. This is to make the load of the aeration tank 40 uniform. At this time, the air lift in the supernatant portion has little effect on the interface of the precipitate in the flow rate adjusting tank 10.

Subsequently, the air flow switching device 70 is shown in FIG.
The state is switched to the state of (c), and the sediment (garbage crushed material from the disposer) in the flow rate adjusting tank 10 is sent to the solid-liquid separating device 20 by an air lift, the solid content is adjusted to the composting device 30, and the liquid content is adjusted for the flow rate. It is returned to the tank 10 (processing 10
3). The amount sent to the solid separation device 20 is, as described above,
It is determined with reference to the air lift time table stored in the memory of the microcomputer. Otherwise, too much will flow into the solid-liquid separator 20 and the solid-liquid separator 20
Is likely to overflow.

Next, the air flow switching device 70 is shown in FIG.
And the sediment (sludge) in the sedimentation separation tank 50 is returned to the flow rate adjustment tank 10 by an air lift (process 104). Since about 30 minutes have passed since the previous return, the sedimentation separation tank 50 is separated into sediment (sludge) and supernatant, only the sludge is returned to the flow control tank 10, and the supernatant is discharged to the sewer. .

Subsequently, the air flow path switching device 70 is shown in FIG.
The state is switched to the state of (e), and aeration for promoting precipitation of the flow rate adjusting tank 10 is performed (Step 105). This is 3
This is because solids cannot be conveyed when the flow control tank 10 after the air lift of the precipitate in (Process 103) is as shown in FIG. 5A. That is, since it is desirable to make it as shown in FIG. 5B, aeration for accelerating precipitation is performed here.

Simultaneously with the above, aeration for accelerating sedimentation in the sedimentation separation tank 50 is performed (process 106). For the same reason as above, if the sedimentation separation tank 50 after the air lift of the sediment in step 4 (process 104) is finished as shown in FIG. 5A, sludge cannot be transported and scum is generated on the water surface. This is because they may be doing so. That is, since it is desirable to make it as shown in FIG. 5B, aeration for accelerating precipitation is performed here.

Then, the air flow switching device 70 is switched to the initial state shown in FIG. 2A, and while the aeration of the aeration tank 40 is being performed again (30 minutes), the flow control tank 10 and the sedimentation separation are performed. Both the tanks 50 precipitate as shown in FIG.

By performing each process in the above-described order, it is possible to prevent problems due to interference between the processes.

That is, if the supernatant air lift in step 2 (process 102) is opposite to the air lift in step 3 (process 103), the precipitate will rise and the sludge will easily flow into the aeration tank 40. When sludge flows into the aeration tank 40, the aeration tank 4
0 becomes activated sludge, and maintenance of activated sludge becomes difficult. Further, even if the supernatant air lift of 2 (Process 102) is performed immediately after the precipitation promoting aeration of 5 (Process 105) is performed, the same as described above occurs.

When the sediment air lift of step 4 (step 104) is performed immediately after the precipitation promoting aeration of step 6 (step 106), the sludge does not settle at the bottom of the settling tank 50, and the purified supernatant is removed. Can not be drained into the sewer.

In this embodiment, after a series of operations 1 (process 101) to 4 (process 104) are completed, 5 (process 105) and 6 (process 106) do not interfere with each other. Supply becomes possible. Simultaneous supply of air allows a series of cycles to be completed in a correspondingly short time. In this embodiment, the stop of the aeration of the aeration tank 40 is short, and the effect of the aeration stop time on the microbial treatment of the aeration tank 40 is provided. And the processing capacity is improved. Since air can be supplied to a plurality of air outlets at the same time as described above, the degree of freedom of system operation is increased, the system operation time is shortened, and a blower, a branch member, etc. System components can be reduced.

Further, by configuring the air flow path switching device 70 as described above, the number of branches can be increased with a relatively simple configuration, and the control becomes simple.

The flow rate of air required for each of the above operations is different. For example, the air flow path switching device 70 shown in FIG.
Of the air outlet H1 of the aeration tank 40,
1 / min, the air outlets H2, H3, and H4, that is, the supernatant and sediment in the flow rate adjusting tank 10 and the sedimentation separating tank 5
40 l / min for the air lift of the sediment at 0, and the air outlets H5, H6,
And 15 l / min for promoting the precipitation in the precipitation separation tank 50.

As described above, various means for changing the air flow rate can be considered. For example, the air flow rate can be adjusted by using a check valve or the air outlet can be narrowed.

In the embodiment shown in FIG. 1, air outlets H1, H5, H6 for aeration and sedimentation which need to be adjusted in flow rate are provided.
Check valves 9 are attached to the air pipes 81, 85 and 86
0 is attached. Although not shown, the check valve 90 can generally adjust the flow rate by changing the elastic force of a spring provided between the valve body and its mounting portion.

Also, the flow rate can be adjusted by changing the opening area of the air outlets H1, H5, H6 for aeration and precipitation for which the flow rate needs to be adjusted, that is, by narrowing. As described above, for example, since the air outlets H2, H3, and H4 for air lift are 40 l / min, no throttle is provided, and the air outlet H1 for aeration is 30 l / min, so that the air outlet H1 is slightly throttled to promote precipitation. Air outlet H5 for
Since H6 is 15 l / min, the aperture may be doubled for the aeration. By doing so, the air outlets H1, H
Since the desired flow rate can be realized only by reducing the flow rate of H5 and H6 to the required flow rate, the configuration can be simplified and the cost can be reduced.

The air outlets H1 to H4, H6 for one use of the blower 60 and for each application of the air flow path switching device 70 are provided.
(At the same time as H5) are arranged in order at equal angles, so that it is only necessary to stop in order at a constant rotation angle and to send air for the above-mentioned time, thereby reducing the cost of the system, reducing the maintenance cost,
In addition to miniaturization, stable control of the water treatment system becomes possible, and water treatment performance can be improved.

Further, for aeration (including aeration for accelerating precipitation)
The air pipes 81, 85, and 86 are provided with the check valve 90 so that the pressure when air is flowing even when the air supply is stopped is maintained, and the air pipes 81, 85, and 86 (particularly, the air diffusers 81a, 85a, and 86a) are provided. It is possible to prevent such a problem that sludge or the like intrudes into and clogs. Especially when aeration is stopped,
The water pressure in the air diffuser holes fluctuates according to the fluctuation of the water surface, the air in the diffuser tubes is compressed, sludge or the like may enter and the diffuser holes may be clogged.
If it is attached to the base portion of 86a, since the volume of compressed air is minimized, there is almost no backflow, which is more effective.

Next, a countermeasure against air leakage from the air flow path switching device 70 will be described.

The air flow switching device 70 shown in FIG. 6 is configured such that the respective sliding contact surfaces formed with the air outlets R1 and R2 of the rotor 71 and the air outlets H1 to H6 of the housing 72 are conical surfaces 71a and 72a. And a coil spring 74 that urges the conical surface 71a of the rotor 71 and the conical surface 72a of the housing 72 to press against each other.
And mounted on a rotating shaft 73 between the rotor 71.

With this configuration, the rotor 7
Since the first conical surface 71a and the conical surface 72a of the housing 72 are in close contact with no gap, air leakage can be prevented.

Also, as can be said with respect to both of FIGS. 2 and 6, when the rotor 71 rotates,
When the operation of the blower 60 is stopped, it is possible to prevent a problem that air leaks into a flow path other than a target flow path during rotation. In particular, this air flow switching device 70
Then, at the time of rotation, the two air outlets R1, R
This is particularly effective because at least one of the two passes through the air outlets H1 to H6 on the housing 72 side.

FIG. 7 is a view showing another embodiment of the air flow path switching device 70. In addition to the functions shown in FIG. 2, the aeration tank 40 can be continuously aerated. is there. 2 denote the same or corresponding parts.

That is, in this embodiment, the rotor 71 and the housing 72 have a two-stage air outlet configuration in the rotation axis direction, and the air outlet H1 of the housing 72 used for aeration of the aeration tank 40 is an upper stage. In response to this, a new air outlet R3 is formed in the upper stage of the rotor 71, and a communication groove 75 is formed in the circumferential direction of the air outlet R3. , It is configured to always communicate with the air outlet H1 of the housing 71 even when rotated in the direction of.

The air flow path switching device 7 configured as described above
The operation of the water treatment system using 0 is performed as shown in the flowchart of FIG. 8 and the timing chart of FIG. The difference from FIGS. 3 and 4 is that the aeration of the aeration tank 40 (process 101 in FIG. 8 and 1 in FIG. 9) is performed continuously in parallel with other processes. Figures 3 and 4
Is the same as

As a result, the aeration tank 40 is not stopped from being aerated, and there is no influence on the microbial treatment of the aeration tank 40, thereby greatly improving the processing capacity. Therefore, it is not necessary to add components such as a blower and a branch member to be used. In this way, it is possible to combine an air outlet that constantly communicates with the air inlet and an air outlet that communicates while switching, thereby reducing system components such as blowers and branch members without sacrificing processing capacity. Becomes possible.

If the number of branches is small, the present invention is not limited to the two-stage configuration as described above, and may be configured as shown in FIGS. 10 and 11 while switching between the air outlet and the air outlet always communicating with the air inlet. Combinations of communicating air outlets can be realized.

The air flow switching device 70 shown in FIG. 10 has an enlarged opening of the air outlet R1 of the rotor 71. When the rotor 71 is set to the state shown in FIG.
1 is the air outlet H1 of the housing 72.
When the rotor 71 is set in the state shown in FIG. 10B, the air outlet R2 of the rotor 71 is not communicated with the air outlet H2 of the housing 72.
The air outlet R1 of the rotor 71 is also in communication with the air outlet H2 of the housing 72 while the air outlet R1 of the rotor 72 remains in communication with the air outlet H1 of the housing 72.

FIG. 11 is a view in which the inside opening of the air outlet H2 of the housing 72 is expanded, and the rotor 71 is set to the state shown in FIG. Is connected to the air outlet H1 of the housing 72, and the air outlet R2 of the rotor 71 is
Is not in communication with the air outlet H2 of the housing 72, and when the rotor 71 is set to the state shown in FIG. 11B, the air outlet R1 of the rotor 71 remains in communication with the air outlet H1 of the housing 72. In this state, the air outlet R2 of the rotor 71 is also in communication with the air outlet H2 of the housing 72.

FIG. 12 shows the rotor 71 in addition to the above.
The flow rate can be adjusted by adjusting the angle.

By setting the rotor 71 as shown in FIGS. 12 (a) and 12 (b), the same function as described above can be realized, and as shown in FIG. 12 (c), the air outlet of the rotor 71 If the angle is adjusted so that R2 and the air outlet H2 of the housing 72 partially communicate with each other, it is possible to arbitrarily set the flow rate from the air outlet H2 while the air outlet H1 remains fully connected. it can.

The flow rate adjusting function by adjusting the angle of the rotor 71 described above is not limited to the one shown in FIG. 12, but can be similarly implemented in each of the above-described embodiments and the later-described embodiment. is there.

FIG. 13 is a structural view showing still another embodiment of the air flow switching device. In the air flow switching device 170 of the present embodiment, one air inlet H0 is provided at the center of the flat surface of the housing 172 having a circular inner surface formed flat.
However, a plurality (three in the figure) of air outlets H1 to H3 corresponding to the number of branches are formed therearound. Housing 1
A rotator 171 that is driven to rotate via a rotation shaft 173 by an external motor (not shown) is built in the 72. One side of the rotor 171 is the housing 17
2 is formed so as to be in close contact with the flat surface of the housing 172, and the flat surface is formed with air outlets H2 and H3 from the center to communicate the air inlet H0 and the air outlets H1 to H3 of the housing 172. Communication groove 1 extending in two directions at the same angle as the angle
74 are formed. Further, a circular communication groove 175 centered on the air inlet H0 is formed at a position where the air outlet H1 is always in communication with the air inlet H0.

Even with this configuration, substantially the same functions and effects as those of the above-described embodiment can be obtained, and since the flat contact is used as compared with the above-described curved contact, the processing accuracy at the time of manufacture is very low. In addition, since it is easy to make close contact, air leakage can be reduced and the configuration is simple.

In the above embodiment, the housing 17
A circular communication groove 175 for constant communication is formed on the second side, but the circular communication groove 1 is similar on the rotor 171 side as shown in FIG.
Even if 76 is formed, a similar operation and effect can be obtained.

The present invention is not limited to the water treatment system having the structure as shown in FIG. 1, but includes, for example, a system in which a liquid separated by a solid-liquid separator is charged into an aeration tank, An aeration tank and a sedimentation / separation tank formed by dividing the inside of one treatment tank with a partition wall, or sludge settled in the sedimentation / separation tank is put into a solid-liquid separator together with a sediment containing a solid content in a flow rate adjustment tank. It can be applied to various types of water treatment systems, such as the above-described one, and the one in which the sediment of the flow control tank is directly injected into a compost (composting) apparatus without a solid-liquid separation device. It can also be applied to water treatment systems such as

[0069]

As described above, according to the present invention, a plurality of treatment tanks for performing various treatments on the water to be treated and air used for each application such as treatment in each treatment tank and transfer between the treatment tanks are provided. A plurality of switchable air outlets, including an air supply means for supplying, and two or more air outlets which can be simultaneously communicated with one air inlet into which the air sent from the air supply means flows. Air flow switching means provided for each application, piping connecting each air outlet of the air flow switching means to each processing tank, and controlling the air flow switching means at a predetermined timing. And control means for supplying air required for each application, so that the air supply means
Since it is possible to perform each treatment efficiently without interfering with each other, it is possible to improve the stability of the water treatment system, improve the performance, reduce the cost, reduce the maintenance cost,
The size can be reduced. Furthermore, since air can be supplied to a plurality of air outlets at the same time, the degree of freedom of system operation increases, shortening of system operation time,
It is possible to reduce the number of system components such as an air supply unit and a branch member while maintaining a high processing capacity.

The air flow switching means has an air inlet in the direction of the rotation axis, and has two or more air outlets communicating with the air inlet in the circumferential direction, and is driven to rotate. A rotor and an air outlet which rotatably accommodates the rotor and has an air inlet in the direction of its axis of rotation, and which can communicate simultaneously with two or more air outlets of the rotor in the circumferential direction. And a housing having a plurality of air outlets including the above. In addition to the above-described effects, the number of branches can be increased with a relatively simple configuration, and control is also simplified.

Further, the respective sliding contact surfaces where the air outlet of the rotor and the air outlet of the housing are formed are conical surfaces, and the conical surface of the rotor and the conical surface of the housing are pressed against each other. By providing the urging means for urging as described above, the conical surface of the rotor and the conical surface of the housing are in close contact with no gap, so that air leakage can be prevented.

The air flow switching means may be a housing having an inner surface formed flat on one side, an air inlet formed at the center of the flat surface, and a plurality of air outlets formed therearound. And one side is formed rotatably in the housing and one side is formed flat, and the flat surface is closely contacted with the flat surface of the housing, and the flat surface is provided with the air inlet of the housing and two or more air The same effect as described above can be obtained by forming a communication part that can simultaneously communicate with the outflow port and a rotor that is driven to rotate. In addition, air leakage can be further reduced due to easy contact, and the configuration is simplified.

Further, by providing an air outlet which is always in communication with the air inlet into which the air sent from the air supply means flows as the air outlet which can be simultaneously communicated, the air which is always in communication with the air inlet is provided. Combination of outlet and air outlet that communicates while switching is possible,
It is possible to reduce the number of system components such as the air supply means and the branch member without sacrificing the processing capacity.

Further, the control means stops the supply of air from the air supply means during rotation of the rotor, so that air leaks into a flow path other than the intended flow path during rotation. Can be prevented.

A check valve is provided between an air outlet for discharging air for aerating the water to be treated and an air diffuser pipe connected to the air outlet by a pipe for diffusing air into the water to be treated. With this configuration, even when the air supply is stopped, the pressure when the air is flowing is maintained, and it is possible to prevent such a problem that sludge or the like enters the air diffuser pipe or the pipe and becomes clogged.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one embodiment of a water treatment system according to the present invention.

FIG. 2 is a view showing a basic configuration and operation of an air flow path switching device used in the system, wherein (a) to (e) are cross-sectional views showing the configuration and operation, and (f) is the above (a) A-A
Sectional view.

FIG. 3 is a flowchart showing the operation of the embodiment.

FIG. 4 is a timing chart showing the operation of the embodiment.

5A and 5B are diagrams for explaining a state of a sediment in a flow rate adjusting tank and a sedimentation separation tank in the embodiment, wherein FIG. 5A shows an undesired state during an air lift, and FIG. .

FIGS. 6A and 6B are diagrams showing a configuration example in which the air flow path switching device is provided with measures against air leakage, wherein FIG. 6A is a cross-sectional view, and FIG.

FIG. 7 is a view showing another embodiment of the air flow path switching device used in the system of FIG. 1, wherein (a) to (d) are cross-sectional views showing the configuration and operation, and (e) is the above ( CC of a)
Sectional drawing, (f) is DD sectional drawing of said (e).

FIG. 8 is a flowchart showing the operation of the embodiment using the air flow switching device of FIG. 7;

FIG. 9 is a timing chart showing the operation of the embodiment.

FIGS. 10A and 10B are diagrams showing another embodiment of the air flow switching device, and FIGS. 10A and 10B are cross-sectional views showing the configuration and operation thereof.

FIG. 11 is a diagram showing a modification of FIG. 10;
(B) is a cross-sectional view showing the configuration and operation.

FIG. 12 In addition to the above, the flow rate can be adjusted by adjusting the angle of the rotor.
(B), (c) is a cross-sectional view showing the configuration and operation.

FIGS. 13A and 13B are configuration diagrams showing still another embodiment of the air flow path switching device, wherein FIGS. 13A and 13B are cross-sectional views, FIG. 13C is a vertical cross-sectional view, and FIG. ) EE sectional view,
(B) is FF sectional drawing similarly.

FIG. 14 is a configuration diagram showing a modified example of FIG. 13;
(A), (b) is a transverse sectional view, (c) is a longitudinal sectional view,
(A) is a GG sectional view of the above (c), and (b) is H
-H sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Flow control tank 11, 12, 51 Air lift pump (pipe) 20 Solid-liquid separation apparatus 30 Compost apparatus 40 Aeration tank 50 Precipitation separation tank 60 Blower 70, 170 Air flow path switching apparatus 71, 171 Rotor 71a, 72a Conical surface R0 Air inlets R1 to R3 Air outlets 72, 172 Housing H0 Air inlets H1 to H6 Air outlets 73, 173 Rotating shaft 74 Coil springs 75, 174, 175, 176 Communication grooves 81 to 86 Air pipes 81a, 85a, 86a Dispersion Trachea 90 check valve

Continued on the front page (72) Inventor Keiichi Fujimoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Jun Yoshida 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka F term (reference) in Sanyo Electric Co., Ltd. 3F047 BA08 3H067 AA13 AA23 CC60 DD03 DD32 DD42 4D027 AA03 AA16 4D029 AA01 AB05

Claims (7)

[Claims] 1. A plurality of treatment tanks for performing various treatments on water to be treated, an air supply means for supplying air used for each application such as treatment in each treatment tank and transfer between the treatment tanks, and the air Air provided with a plurality of switchable and controllable air outlets including two or more air outlets that can simultaneously communicate with one air inlet into which air sent from the supply means flows for each application Flow path switching means; pipes for communicating each air outlet of the air flow path switching means with each processing tank; controlling air flow switching means at a predetermined timing to obtain air required for each application. And a control means for supplying water. 2. The air flow switching means has an air inlet in a rotation axis direction, and has two or more air outlets communicating with the air inlet in a circumferential direction, and is rotationally driven. A rotor and an air outlet which rotatably accommodates the rotor and has an air inlet in the direction of its axis of rotation, and which can communicate simultaneously with two or more air outlets of the rotor in the circumferential direction. The water treatment system according to claim 1, comprising a housing having a plurality of air outlets including: 3. A conical surface is formed on each of the sliding surfaces on which the air outlet of the rotor and the air outlet of the housing are formed, and the conical surface of the rotor and the conical surface of the housing are pressed against each other. The water treatment system according to claim 2, further comprising an urging means for urging the water. 4. A housing in which the air flow path switching means has an inner surface formed flat on one side, an air inlet formed in a central portion of the flat surface, and a plurality of air outlets formed therearound. And one side is formed rotatably in the housing and one side is formed flat, and the flat surface is closely contacted with the flat surface of the housing, and the flat surface is provided with the air inlet of the housing and two or more air 2. The water treatment system according to claim 1, further comprising: a rotor formed with a communicating portion capable of communicating with the outlet at the same time. 5. An air outlet which is always in communication with an air inlet into which air sent from the air supply means flows is provided as the air outlet which can be communicated at the same time. The water treatment system according to claim 4. 6. The water treatment system according to claim 2, wherein the control unit stops the supply of air from the air supply unit when the rotor rotates. 7. A check valve between an air outlet for discharging air for aerating the water to be treated and an air diffuser pipe connected to the air outlet by a pipe to diffuse air into the water to be treated. The water treatment system according to any one of claims 1 to 6, further comprising: