JP2000000588A - Water treatment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the stability and capacity of a water treatment system while reducing the cost thereof and to achieve the reduction in operation costs and miniaturization thereof. SOLUTION: A plurality of treatment tanks 10, 40, 50, an air supply means 10 for supplying air used in the treatment of the respective treatment tanks or the transfer between the treatment tanks and an air flow channel changeover means 70 having a plurality of air outflow ports H1-H6 made controllable in changeover with respect to one air inflow port 110 into which air sent by the air supply means 60 flows are provided and the respective air outflow ports H1-H6 of the air flow channel changeover means 70 are arranged in the order sending air at every use to form a piping system and a control means controlling the air flow channel changeover means 70 in predetermined timing to supply air at every time predetermined at every use is provided.

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 crushed garbage from a disposer of a sink.
In particular, the present invention relates to an improvement in an air supply mechanism used for processing in each processing tank (promoting aeration and sedimentation) and transferring between each processing tank (air lift).

[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 applications such as aeration, air lift, and precipitation promotion 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 crushed material (solid content) from a disposer, the wastewater containing garbage crushed material from the disposer is temporarily stored in a flow rate control tank, and the wastewater is stored in a flow control tank. The precipitate is put into a solid-liquid separator by an air lift to separate it into solids and liquids. The liquids are returned to the flow control tank, and the solids are 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 a settling / separation tank to precipitate sludge, and the supernatant is discharged to a sewer, and the settled 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 to the solid-liquid separation device, blower for air-lifting (returning) the sediment in the sedimentation separation tank to the flow control tank, and a blower for accelerating the precipitation in the flow control tank. 6 such as a blower and a blower for aeration for accelerating precipitation in the precipitation 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 supernatant is performed before the air lift of the supernatant in the flow rate control tank, the interface of the precipitate is disturbed, so that sludge and solids are soared, mixed into the air lift of the supernatant 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.

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 simple air flow path switching means.
It is intended to reduce costs, reduce maintenance costs, reduce the size, and the like.

[0010]

In order to achieve the above object, according to the present invention, there are provided 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 having air supply means for supplying air used for various uses such as transfer, and a plurality of air outlets which can be switched and controlled with respect to one air inlet into which air sent from the air supply means flows Flow path switching means, wherein the air outlets of the air flow path switching means are arranged and formed in the order in which air is sent for each application, and the air flow path switching means is controlled at a predetermined timing. And a control means for supplying air for a predetermined time for each application.

A plurality of treatment tanks for performing various treatments on the water to be treated; air supply means for supplying air used for various purposes such as treatment in the treatment tanks and transfer between the treatment tanks; Air flow switching means having a plurality of air outlets switchable to one air inlet into which air sent from the supply means flows, and each air outlet of the air flow switching means A control means for arranging the pipes for sending air for each application so as not to intersect and controlling the air flow path switching means at a predetermined timing to supply air for a predetermined time for each application. It is characterized by having.

Further, a flow rate adjusting means for adjusting a flow rate according to each application is provided at an air outlet of the air flow path switching means.

The flow rate adjusting means includes a check valve for preventing backflow by elastic deformation of the elastic member, and the flow rate is adjusted by changing the elastic force.

Further, the flow rate adjusting means adjusts the flow rate by changing the opening area of the air outlet.

Further, the air flow path switching means is provided with position detecting means for detecting a position of each air outlet including a specific position when each air outlet makes a round, and the control means is provided with the position detecting means. The air flow path switching means is controlled based on a specific position detection output of the means and another position detection output following the specific position detection output.

If the switching is not completed within a certain period of time based on the time required for the air flow switching by the air flow switching means, the control means may indicate that the air flow switching means is abnormal. Is output.

A bypass path for flowing air from the air supply means to a specific flow path without passing through the air flow path switching means; and a bypass path for supplying air from the air supply means when an abnormality occurs in the air flow path switching means. A bypass valve that allows air to flow into a specific flow path via the bypass path is provided.

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 piping to diffuse air into the water to be treated. It is characterized by having.

Further, the check valve is attached to a root portion of the air diffuser.

The air flow switching means has an air inlet in the direction of the rotation axis, a rotor having an air outlet communicating with the air inlet in a circumferential direction, and a rotatable rotor. And has an air inlet in the direction of its rotation axis,
A housing having a plurality of air outlets in a circumferential direction, and a motor for rotating the rotor such that the air outlet communicates with one of the air outlets of the housing. It is.

Further, the air inlet of the rotor and the air supply means are directly connected by a flexible hose.

Further, the flexible hose is formed with one or more loops.

[0023] Further, there is provided a control means for rotatingly driving the rotor within a range of 0 ° to 360 °.

Further, there is provided a control means for stopping the air supply means when the rotor rotates.

Further, the inside diameter of the air outlet in the housing is larger than the inside diameter of the air outlet in the rotor.

Further, the air inlet of the rotor and the air supply means are connected via a joint slidable by 360 ° or more.

On the other hand, a vent is formed to guide air leaking through a gap between the housing and the rotor to the motor.

An air outlet requiring a small flow rate is disposed on both sides of the air outlet requiring a large flow rate, and a rotor is used when air is discharged from the air outlet requiring a large flow rate. The air leaking from the air outlet to the gap between the rotor and the housing flows out from the air outlet that requires a small flow rate.

The air flow path switching means includes a branch pipe for branching air from the air supply means into a plurality of pieces, a flexible hose connected to each outlet of the branch pipe, and a flexible hose. And a roller for squeezing a part other than the hose used, and a motor for driving the roller.

The air flow switching means has a disc-shaped housing having an air inlet on one side and a plurality of air outlets on a peripheral edge on the other side, and the air outlet in the housing. And a closing member which is urged by the elastic member to close the corresponding air outlet, and which is rotatably provided inside the closing member and biases one of the closing members by the urging force of the elastic member. And a motor for rotating the cam so as to open the corresponding air outlet by moving the cam.

Further, the air flow path switching means has a disk-shaped housing having an air inlet at a central portion on one side and a plurality of air outlets around the air inlet, and the air outlet in the housing. A closing member formed correspondingly and formed of an elastic member to close the corresponding air outlet, and one of the closing members provided rotatably inside these closing members against its elastic force. It is characterized by comprising a cam that moves to open a corresponding air outlet, and a motor that rotates this cam.

The air flow switching means has a housing having an inner surface formed flat on one side, an air inlet formed at 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 this flat surface is closely contacted with the flat surface of the housing by an elastic member, and the flat surface is connected to the air inlet of the housing by one side. It is characterized by comprising a rotor having a communication groove communicating with the air outlet, and a motor for rotating the rotor.

[0033]

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 precipitate is sent 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 this water treatment system, one blower (air pump) 60 is used.
The air is supplied to the flow rate 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, but since the replacement is only for one unit, the cost can be reduced by reducing the number of units and the maintenance cost can be reduced. Also,
Since only one blower 60 is required, noise and vibration can be reduced, power consumption is reduced, and electricity costs are reduced.

As will be described in detail later, the air flow switching device 70 basically has an air inlet R0 in the direction of the rotation axis, and an air outlet R1 communicating with the air inlet R0. A rotor 71 having a circumferential direction, a rotatable housing of the rotary rotator 71, an air inlet H0 in the direction of the rotation axis, and six air outlets H1 to H6 in the circumferential direction. The housing 72 includes a motor (not shown) that is driven to rotate so that the air outlet R1 of the rotor 71 communicates with one of the air outlets H1 to H6 of the housing 72.

The six air outlets H1 to H6 of the air flow path switching device 70 are adjusted in flow rate for each application as described later, and are arranged and piped in the order in which air is sent. That is, an air pipe 81 indicated by a broken line is connected to the first air outlet H1, and a tip of the air pipe 81 is connected to the bottom of the aeration tank 40 and is connected to a diffuser pipe 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 a lower part of an air lift pump (pipe) 11 for air lifting the sediment in the flow control 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 a 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 the fifth air outlet H5, and a distal end of the air pipe 85 is connected to a lower part of the flow control tank 10 and is connected to a diffuser pipe 85a.

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

Although not shown, a control unit including a microcomputer (hereinafter abbreviated as a microcomputer) for controlling the entire water treatment system, and an operation display unit for displaying various operations and statuses such as 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. 2 and the timing chart of FIG.

The switching of the air flow path from the blower 60 by the air flow path switching device 70 is performed in the following order, and this is repeated at a substantially constant cycle (for example, about 30 minutes). Aeration of the aeration tank 40 (for example, 30 minutes) The supernatant of the flow control tank 10 is air-lifted to the aeration tank 40 (depending on the water level, for example, ten to several hundred seconds) The precipitate of the flow control tank 10 is transferred to the solid-liquid separation device 20. Air lift (depending on water level, for example, several seconds to several tens of seconds) Air lift (depending on water level, for example, several seconds to several tens of seconds) of sediment in sedimentation separation tank 50 A hundred and several tens of seconds) aeration for accelerating the precipitation in the precipitation separation tank 50 (for example, several seconds to one hundred and several tens of seconds)

That is, first, 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. 2). Here, the water to be treated is purified by the aerobic microorganisms.

Next, the supernatant of the flow control tank 10 is used for the aeration tank 4.
The air is lifted to 0 (process 102). Flow control tank 10
Is separated into a supernatant and a precipitate, and 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, since the supernatant is an air lift, the influence of the precipitate in the flow rate adjusting tank 10 on the interface is small.

Subsequently, the sediment (crushed garbage from the disposer) in the flow control tank 10 is sent to the solid-liquid separation device 20 by an air lift, and the solid content is sent to the compost device 30.
The liquid component is returned to the flow control tank 10 (process 103). The amount sent to the solid separation device 20 is determined by referring to the air lift time table stored in the memory of the microcomputer as described above. Otherwise, the solid-liquid separation device 20
This is because there is a possibility that the solid-liquid separation device 20 may overflow due to too much flow into the device.

Next, the sediment (sludge) in the sedimentation separation tank 50 is returned to the flow control tank 10 by an air lift (processing 1).
04). Since about 30 minutes have passed since the previous return, the sedimentation separation tank 50 is separated into a sediment (sludge) and supernatant, only the sludge is returned to the flow control tank 10, and the supernatant is discharged to the sewer. .

Subsequently, aeration for accelerating precipitation in the flow rate adjusting tank 10 is performed (Step 105). This is the same as (Process 1)
This is because the solid content cannot be conveyed when the flow rate adjusting tank 10 after the air lift of the precipitate of 03) is finished as shown in FIG. That is, since it is desirable to make it as shown in FIG. 4 (b), aeration for accelerating precipitation is performed here.

Next, aeration for accelerating sedimentation in the sedimentation separation tank 50 is performed (step 106). For the same reason as above, if the sedimentation separation tank 50 after the airlift of the precipitate in the above (treatment 104) is finished as shown in FIG. 4A, sludge cannot be transported and scum is generated on the water surface. This is because it is possible. That is, since it is desirable to make it as shown in FIG. 4 (b), aeration for accelerating precipitation is performed here.

While the aeration tank 40 is being aerated again (30 minutes), the flow control tank 10 and the sedimentation separation tank 5
In both cases, precipitation occurs as shown in FIG.

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

In other words, if the supernatant air lift in (Process 102) is opposite to the precipitate air lift in (Process 103), the precipitate will soar up 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. In addition, immediately after performing the aeration for precipitating in (Process 105) and performing the supernatant air lift in (Process 102), the same phenomenon as described above occurs.

Further, when the sediment air lift is performed immediately after (treatment 104) after the aeration for precipitation promotion in (treatment 106), the sludge does not settle at the bottom of the precipitation separation tank 50, and the purified supernatant is removed from the sewer. Can not be flushed.

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, the precipitate, and the precipitate separation tank 5 in the flow rate adjustment tank 10.
40 l / min for the air lift of the precipitate at 0, and the air outlets H5 and H6,
And the rate of promoting precipitation in the precipitation separation tank 50 is 15 l / min.

As described above, various means for changing the flow rate of air can be considered. FIG. 5 shows an embodiment of a flow control valve using a check valve, and FIG. 6 shows an embodiment in which the air outlet is narrowed. It is an example.

As described above, the air flow switching device 70
Has a rotor 71 having an air inlet R0 in the direction of the rotation axis, an air outlet R1 communicating with the air inlet R0 in the circumferential direction, and the rotatable rotator 71 rotatably housed therein.
It has an air inlet H0 in the direction of its axis of rotation, and 6 in the circumferential direction.
A housing 72 having two air outlets H1-H6;
The rotor 71 includes a motor 73 that rotationally drives the rotor 71 such that the air outlet R1 communicates with one of the air outlets H1 to H6 of the housing 72. A positioning rotary plate 75 is attached to a rotary shaft 74 of a rotor 71 driven to rotate by a motor 73, and air outlets H <b> 1 to H <b> 6 are provided around the peripheral edge of the positioning rotary plate 75.
Are formed, and one of them (H
6) is formed wide so that it can be distinguished from the others for the current position recognition. In addition, a microswitch 76 that is turned on by a protrusion is mounted near the peripheral edge of the positioning rotary plate 75.

In the embodiment shown in FIG. 5, air outlets H1 and H1 for aeration and precipitation promotion which require flow rate adjustment are required.
The air pipes 81, 85, 86 piped to 5, H6
A flow control valve using a check valve 90 is attached.
The check valve 90 can adjust the flow rate by changing the elastic force of the spring 90c between the valve body 90a and the mounting ring 90b. Further, the check valve 90 also has a function of preventing a backflow due to the water pressure in the tank when the air supply is stopped, and the diffuser tubes 81a, 85a, and 8 are provided without a separate check valve.
The fine diffuser holes 6a can be prevented from being clogged by sludge or the like.

In the embodiment shown in FIG. 6, the air outlets H1, H5 and A5 for aeration and sedimentation which need to be adjusted in flow rate.
The flow rate is adjusted by changing the opening area of H6, that is, by reducing the opening area. As described above, for example, the air outlets H2, H3, and H4 for the air lift
1 / min, no throttle is provided, and the air outlet H1 for aeration is 30 l / min. Therefore, a slight throttle is used as shown in FIG. 6, and the air outlets H5, H6 for accelerating precipitation are 15 l / min. min, so the aperture is doubled for the aeration. As described above, a desired flow rate can be realized only by narrowing the air outlets H1, H5, and H6 in accordance with a required flow rate, so that the configuration can be simplified and the cost can be reduced.

Since the air outlets H1 to H6 for each application of the air flow path switching device 70 are arranged in order by one blower 60, the micro switch 76 makes the positioning rotary plate 75 wide. After detecting the protrusion (corresponding to the air outlet H6), when the next protrusion is detected (corresponding to the air outlet H1), the home position is set as the home position. Since air only needs to be sent, in addition to reducing the cost of the system, reducing maintenance costs, and miniaturizing it, stable control of the water treatment system becomes possible.
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 fluctuates according to the fluctuation of the water surface, the air in the diffuser pipe is compressed, and sludge or the like may enter and the diffuser may be clogged, as shown in FIGS. 7 (a) and 7 (b). In addition, since the volume of the compressed air is minimized by being attached to the base of the diffuser tubes 81a, 85a, 86a, the backflow is almost eliminated, which is more effective. Preferably, the inside diameter of the air diffusers 81a, 85a, 86a is smaller. FIG. 7A shows a T-shaped air diffuser, and FIG. 7B shows an L-shaped air diffuser.

In the above embodiment, as shown in FIG. 1, each of the tanks 10, 40, 50
Since the pipes (air pipes 81 to 86) cross each other and become complicated, as shown in FIG.
The air outlets H1 to H6 may be arranged and formed so that 6) does not intersect, and switching of the air flow path may be controlled by the motor 73 as follows.

That is, assuming that the motor 73 (rotor 71) rotates clockwise (CW) in FIG. 8, the microswitch 76 detects the next projection after the wide projection of the positioning rotary plate 75 is detected. The motor is stopped at the detected home position (H1).
Next, when the motor is turned on, the motor is stopped (H2).
Is turned on twice, the motor is stopped (H3).
When the motor is turned on twice, the motor is stopped (H4).
Is turned on three times, the motor is stopped (H5).
Is turned on twice, the motor stops (H6). The motor 73 is rotated by () CW. When the micro switch 76 turns on twice, the motor stops (H1). The above is repeated.

In the above description, the rotation direction of the motor is all CW (clockwise). However, depending on the arrangement of the system, it is more efficient to use a motor capable of counterclockwise (CCW). There is also.

With the above configuration and control, the piping system of the entire system can be simplified, and the size can be further reduced.

By the way, in the above embodiment, FIG.
The air flow switching device 70 having six air outlets H1 to H6 is used to branch the air flow from one blower 60 into six applications that can be considered in the water treatment system of the present invention. The number of branches can be reduced depending on the difference in configuration and the importance in each application. For example, also in the systems shown in FIGS. 1 and 8, the aeration for accelerating the precipitation in the precipitation separation tank 50 is not so important, and if this is not performed, the number of branches is five.

FIG. 9 is a configuration diagram of an air flow path switching device having five branches. Although the number of branches is reduced by one from that of the above embodiment, the basic configuration is almost the same.

That is, a rotor 71 having an air inlet R0 in the direction of the rotation axis and having an air outlet R1 communicating with the air inlet R0 in the circumferential direction, and rotatably accommodated the rotary rotator 71. Then, a housing 72 having an air inlet H0 in the rotation axis direction and five air outlets H1 to H5 in the circumferential direction, and a rotor 71 having the air outlet R1 The motor 73 is rotatably driven to communicate with the air outlets H1 to H5.

A positioning rotary plate 75 is mounted on a rotary shaft 74 of a rotor 71 driven to rotate by a motor 73. The positioning rotary plate 75 has a peripheral edge formed with air outlets H1 to H5. Corresponding protrusions P1 to P5 are formed, and one of the protrusions P5 (corresponding to H5) is formed wide so as to be distinguishable from the other for current position recognition. In addition, a microswitch 76 that is turned on by the projections P1 to P5 is attached near the periphery of the positioning rotary plate 75. A hose from the blower is connected to an air inlet H0 formed to protrude from an upper portion of the housing 72.

A bearing 77a is provided on the inner wall of the upper portion of the housing 72 where the outer periphery of the air inlet R0 of the rotor 71 slides.
A bearing 77b is press-fitted on the outer periphery of the rotor 71 which is in sliding contact with the inner wall of the housing 72 in which the air outlets H1 to H5 are formed. The bearing 77a is formed of a resin bearing, a ball bearing, an oil seal, or the like.
The air supplied from the air inlet H0 formed in the upper part of the rotor 2 is connected to the outer periphery of the air inlet R0 of the rotor 71 and the housing 72.
It works to prevent leakage from between the inner circumference. The bearing 77b press-fitted to the outer periphery of the rotor 71 is made of a resin bearing or a rubber packing having a small coefficient of friction, and a hole having the same diameter is formed at a position corresponding to the air outlet R1 of the rotor 71. Air is allowed to flow out, and the rotor 7
(1) a function of suppressing air leaking slightly from between the outer circumference of the air inlet R0 and the inner circumference of the housing 72 and the air from the air inlet R0 leaking to air outlets other than the target air outlets H1 to H5. do.

When the system is turned on, the motor 73 is turned on.
With the rotation of, the positioning rotary plate 75 with the projections P1 to P5 rotates (at this time, the blower 60 is turned off). The positioning rotary plate 75 has one wide projection P5,
When this hits the arm 76a of the micro switch 76, the micro switch 76 is turned on for a longer time than the other.
The current position can be recognized (FIG. 9D). When the motor 73 further rotates, the arm 76a of the micro switch 76 comes off the wide projection P5 and is turned off (FIG. 9E).

Further, when the motor 73 rotates and the micro switch 76 is turned on next time, the rotation is stopped (FIG. 10).
(A1), (a2)), this is the home position (H
1), the blower 60 is turned ON, and stopped for the longest fixed time (about 30 minutes) as described above.
Aeration of 0 is performed. After a certain period of time, blower 60 is turned on.
FF, and the motor 73 starts rotating (FIG. 10 (b1),
(B2)), when the arm 76a of the microswitch 76 comes off the projection P1, the microswitch 76 is turned off (FIGS. 10 (c1) and 10 (c2)). When the motor 73 further rotates and the micro switch 76 is turned on, the motor 7
3 stops, and the blower 60 is turned on ((d1) and (d2) in FIG. 10). In this case, as described above, the air lift of the supernatant of the flow rate adjusting tank 10 is performed for a period of time (tens of seconds to hundreds of seconds) according to the water level. By repeating the above operation, a predetermined water treatment operation is repeated at a substantially constant cycle.

As described above, the current position is recognized by detecting the wide projection P5 of the positioning rotary plate 75,
Since the detection of the next projection P1 is operated as the home position (H1), even when the power is cut off due to a power failure or the like, it can be started correctly without malfunction when restarting.

Next, the air flow path switching device 70 as described above
The following describes measures to be taken in the event that an abnormality occurs for any reason.

FIG. 11 is a diagram showing a main part of a water treatment system in which the above countermeasures are taken. The air from the blower 60 is supplied to the air diffuser 81 of the aeration tank 40 without passing through the air flow path switching device 70.
a, and a bypass valve 87a for flowing air from the blower 60 to the air diffuser 81a through the bypass passage 87 when an abnormality occurs in the air flow path switching device 70.

FIG. 12 is a diagram showing the control circuit. The microcomputer 100 for controlling the entire water treatment system includes a blower 60, a motor 73 and a micro switch 76 of an air flow path switching device 70, an operation display section 101, Bypass valve 87
The bypass path switching unit 102 that opens and closes a is connected.

FIG. 13 is a flowchart showing an air flow path switching routine in which the above countermeasures are taken. When this routine is started at the time of air flow path switching, the blower 60 is first stopped before the motor 73 is driven. (Process 201). Then, the motor 73 is energized to rotate the rotor 71 (process 202).

Next, it is checked whether or not the micro switch 76 has been turned on by the next position detecting projection within a predetermined time after the rotor 71 starts rotating (decision 203). Here, if the microswitch 76 is turned on within a predetermined time, no abnormality has occurred, and the motor 7
3 is stopped (process 204), the operation of the blower 60 is started (process 205), and the routine ends.

On the other hand, if the micro switch 76 does not turn on after a certain period of time, it is determined that the switching is abnormal, and an abnormality is displayed to the user on the LCD (liquid crystal display) of the operation display unit 101 (determination 203 No → Process 206 → Process 20
7) Restrict the user from using the disposer or the like. Then, the bypass path switching unit 102 is activated to open the bypass valve 87a, and the air bypass path 87 to the air diffuser 81a of the aeration tank 40 is secured, and then the operation of the blower 60 is started (processing 208 → processing). 205). That is, in this type of water treatment system, the aeration process in the aeration tank 40 is the most important process for maintaining the system, and when the air flow switching device 70 is located at a position other than the aeration in the aeration tank 40. If the air flow switching device 70 fails and the period during which aeration is not performed is prolonged, aerobic microorganisms that decompose organic substances are killed, and the system collapses.

It should be noted that the user may be notified of the abnormality by sound instead of or together with the abnormality display. Further, the bypass valve 87a may be manually operated. In the case of manual operation, a display for instructing the user to open the bypass valve 87a together with the occurrence of an abnormality may be provided.

With the above arrangement, it is possible to quickly detect the occurrence of a failure in the air flow path switching device 70, and to shorten the system stop time due to maintenance and inspection. In addition, measures to minimize damage to the system (securing a bypass path) can be automatically or manually taken until the component replacement is completed based on the detection result.

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

In the air flow switching device 70 shown in FIG. 9, air leakage is prevented by interposing bearings 77a and 77b made of resin or the like at the contact portion between the rotor 71 and the housing 72. However, since the rotor 71 is slidably rotated, as shown by a broken line arrow in FIG.
A slight air leak occurs from the small gap.

Therefore, in the case of FIG. 15, the air inlet R0 of the rotor 71 is extended upward to protrude upward from the inlet air inlet H0 of the housing 72, contrary to the above-mentioned FIGS. Is formed. And this rotor 7
A flexible hose from the blower 60 is connected to the air inlet R0 on one side. Thereby, the air from the blower 60 directly enters the air inlet R0 of the rotor 71, so that the air leakage at the time of inflow as shown in FIG. 14 can be completely prevented.

As shown in FIG. 16, the hose 61 having flexibility from the blower 60 is formed with one or more (here, once) loops 62. (A) of FIG.
Shows the state of the hose 61 at the initial position (0 °) of the air flow path switching device 70, and FIG.
The state of the hose 61 in で) is shown. Loop 6 above
Reference numeral 2 denotes a loop similar to the loop formed in the cord of the handset of the telephone. By forming such a loop 62 in advance, the torsion of the hose 61 can be prevented.

Further, in FIG. 17, the rotor 7
Rubber packings 78a and 78b having a small friction coefficient are interposed above and below the sliding surface between the housing 1 and the housing 72. In this way, the rotor 7
It is possible to prevent the air from the first air outlet R0 from leaking above and below the housing 72.

FIG. 18 shows the air flow switching device 7 in the above case.
The control mode is 0, and the air flow path switching device 70 rotates clockwise from the home position shown at the left end of the drawing as shown by the arrow at the top of the drawing, and stops at the target position. Next, when the target position is located beyond the home position at the right end of the figure, as shown by the arrow on the lower side of the figure, it rotates in the opposite direction (counterclockwise) to move to the target position. Stop. In this way, control is performed so as to rotate forward and reverse between 0 ° and 360 °. By controlling in this manner, the hose 61 can be prevented from being twisted or disconnected, and can be prevented from being damaged by the twist.

When the rotor 71 rotates, the blower 6
When the operation of the rotor 0 is stopped, the position of the rotating rotor 71 is not shifted or damaged by the air pressure from the blower 60, and the number of failures is reduced. Further, it is possible to prevent a problem that air leaks into a flow path other than a target flow path during rotation.

Further, as shown in FIG.
By making the inner diameter Y of the second air outlets H1 to H5 larger than the inner diameter X of the air outlet R1 of the rotor 71, the pressure of the outflowing air becomes smaller at the boundary of the air outlet R1 of the rotor 71. Thus, leakage on the outflow side can be suppressed. In this case, it is desirable that the inner diameter Y of the air outlets H1 to H5 of the housing 72 be larger than the inner diameter X of the air outlet R1 of the rotor 71 by 20% or more.

Although it is not as effective in preventing leakage as described above, as shown in FIG. 20, the rotor 71 is slid 360 ° or more through the rubber packing 78 having a small coefficient of friction into the air inlet R0. By providing the movable joint 79, the above-mentioned control becomes unnecessary and the piping can be set arbitrarily, so that the flexibility of the piping is improved.

The check valve 90 shown in FIG.
Is provided, air is sent only when the air outlet R0 of the rotor 71 faces the air outlet of the housing 72 to which air is to be sent, and leaked air is prevented from leaking out of the other air outlets. be able to.

In the above description, the air leakage is reduced as much as possible. On the contrary, the air leakage can be positively used.

As described above, the air flow switching device 70 shown in FIG. 14 requires a small gap between the resin bearings 77a and 77b in order to rotate the rotor 71. As shown by a broken line arrow, the air outlet of the rotor 71 is determined by the gap between the outer circumference of the rotor 71 and the outer circumference of the air inlet R0 and the inner circumference of the center of the housing 72 and the outer circumference of the bearing 77b press-fitted into the rotor 71. An air outlet (H4 or the like in the figure) of the housing 72 other than the direction in which R1 faces;
Air leaks into the gap between the rotation center of the base B and the rotor 71.

FIG. 21 shows that a vent hole 73b is formed in a holder 73a which covers the upper surface of the motor 73 so that air leaking downward can be effectively used through the vent hole 73b in order to effectively use the downward air leakage indicated by the broken arrow. By pressing the motor 73 against the motor 73, it can be used for cooling the motor 73. The air hitting the motor 73 is supplied to the vent hole 7 shown in FIG.
The gap 73c between the motor 3b and the motor 3b is drawn downward.

FIG. 22 shows a water treatment system such as that shown in FIG. 1, wherein the air adjacent to both sides of the aeration air outlet H1 of the aeration tank 40 in which ventilation is normally performed for the longest time (for example, 30 minutes). The outlets H5 and H6 are used by piping for promoting the precipitation of the flow rate control tank 10 and promoting the precipitation of the precipitation separation tank 50, respectively. As a result, the air that has leaked out during the long-time aeration acts as a sedimentation promoting agent for the flow rate adjusting tank 10 and a sedimentation promoting agent for the sedimentation separation tank 50.
Although the amount of air is small, it is performed for as long as the aeration, so that a uniform precipitation promoting effect can be achieved without disturbing the interface of the precipitate much.

FIG. 23 is a schematic configuration diagram showing another embodiment of the air flow switching device. In the air flow switching device 170 of the present embodiment, the air from the blower 60 is supplied to the three flexible hoses 171 a and 171 by using the branch pipe 171.
b, 171c, and each hose 171a, 171
b and 171c are arranged on the inner wall of the cylindrical housing 172 at different positions as shown in FIGS. In addition, the cylindrical housing 17
A rotation shaft 174 of a motor 173 is passed through the center of the housing 2, and a pressing roller 175 slidably in contact with the inner wall of the housing 172 is attached to the rotation shaft 174.

The motor 173 rotates according to the output from the microcomputer 100, and the rollers 175 rotate the hoses 171a to 171a.
Squeeze 1c. Each of the hoses 171a to 171c is always one of two hoses 171a to 171c, as shown in FIGS.
Only the book (the hoses 171a and 171b in the figure) is attached to the inner wall of the housing 172 so as to be squeezed so as to be squeezed.
Only from c) air will flow to the intended application.

In the present embodiment, the number of branches is limited to some extent, but there is an advantage that processing accuracy at the time of manufacturing is not so required.

FIG. 24 is a structural view showing still another embodiment of the air flow switching device. In the air flow switching device 270 of the present embodiment, one air flow is provided at the center of one side of the disc-shaped housing 272. A plurality of (four in this case) air outlets H1 to H4 corresponding to the number of branches are formed on the other peripheral edge of the inlet H0. An open / close button 275 urged by a spring 274 in a direction to close the air outlets H1 to H4 is attached to the housing 272 at a position corresponding to the air outlets H1 to H4. Each open / close button 27
A packing 276 for preventing air leakage is attached to the tip end face of 5, and a flange 277 is formed at the base of the open / close button 275. A disc-shaped cam 278 that is driven to rotate by an externally mounted motor 273 is provided inside each of the open / close buttons 275, and the protrusion of the cam 278 is configured to contact the flange 277 of the open / close button 275. I have.

The motor 273 rotates according to the output from the microcomputer 100, and the projection of the cam 278 comes to one of the flanges 277 of the open / close button 275 which has closed the air outlets H1 to H4 by the urging force of the spring 274. Then, the open / close button 275 is pushed back against the urging force of the spring 274, the air outlet (H1 in the figure) is opened, and the air flows out.

The embodiment of the present invention does not require much processing accuracy at the time of manufacture and is thin, so that a compact air flow switching device can be realized.

FIG. 25 is a schematic structural view showing the above-described modification, and an air inlet H0 is provided at the center of one side of the housing 272.
However, a plurality (three in the figure) of air outlets H1 to H3 corresponding to the number of branches are formed therearound, and the motor 273 is attached to the other side. In this modification, the air outlet H
An elastic plate 274a such as a leaf spring or a rubber stick is used as a member that opens and closes 1 to H3, and a concave portion 275a is formed in a portion corresponding to the air outlets H1 to H3.

Also in this modification, the motor 273 rotates according to the output from the microcomputer 100, and as shown in FIG. 17A, when the projection of the cam 278 pushes up the end of the elastic plate 274a, the air flow When the outlets H1 to H3 (H1 in the figure) are opened and air flows out, and the projection of the cam 278 comes off as shown in FIG. 13C, the elastic plate 274a returns to its original position and the air outlet H1 is closed. It is.

Also in this modified example, the processing accuracy at the time of manufacturing is not so required, and since it is thin, a compact air flow switching device can be realized.

FIG. 26 is a structural view showing still another embodiment of the air flow switching device. In the air flow switching device 370 of the present embodiment, the housing 3 has a circular shape and a flat inner surface.
One air inlet H0 is formed at the center of the flat side of 72, and a plurality (four in the figure, four) of air outlets H1 to H4 corresponding to the number of branches are formed therearound. The housing 372 has a built-in rotor 371 that is driven to rotate by an external motor 373. The rotor 371 is formed flat so that one side thereof is in close contact with the flat surface of the housing 372, and the air inlet H of the housing 372 is formed on the flat surface.
A communication groove 371a is formed for communicating the air outlet 0 with one of the air outlets H1 to H4. The rotor 371 is urged by a plurality of springs 374 so as to be in close contact with the flat surface of the housing 372, and
A rubber packing 376 having a small coefficient of friction and having openings at the air inlet H0 and the outlets H1 to H4 is attached to the flat surface of.

Also in this embodiment, the motor 373 rotates according to the output from the microcomputer 100, and stops when the communication groove 371a of the rotor 371 is located at the target air outlet H1 to H4 (H1 in the figure). Since the rotor 371a is urged by the spring 374 and the flat surface of the rotor 371 and the flat surface of the housing 372 are in planar contact via the packing 376, air leakage hardly occurs.

Also in the present embodiment, the processing accuracy during production is not so required, the air leakage can be reduced, and no cam or the like is required, so that the configuration is simple.

Although the position detecting mechanism is not shown in the other embodiments, it can be realized by the same positioning rotary plate and micro switch as in the above embodiment. Further, a non-contact photo sensor may be used instead of the micro switch.

Further, the present invention is not limited to the water treatment system having the structure shown in FIGS. 1, 8 and 22. For example, the liquid separated by the solid-liquid separation device may be subjected to an aeration tank. The sludge deposited in the sedimentation / separation tank together with the sediment containing the solids in the flow rate control tank is solidified together with the sludge to be charged into the tank, the aeration tank and the sedimentation / separation tank formed by dividing the inside of one treatment tank with partition walls. It can be applied to various types of water treatment systems, such as those that are put into a liquid separator, and those that do not have a solid-liquid separator but directly put the sediment in a flow control tank into a compost (composting) device. Yes, and can also be applied to water treatment systems such as septic tanks.

[0113]

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. Air supply means for supplying air; and air flow path switching means having a plurality of air flow outlets switchable to one air inflow port into which air sent from the air supply means flows. The respective air outlets of the flow path switching means are arranged and formed in the order in which air is sent for each application, and the pipes are controlled at a predetermined timing to control the air flow path switching means for a predetermined time for each application. By providing a control means for supplying air each time, only one air supply means is required and each processing can be performed efficiently without interfering with each other, thereby improving the stability of the water treatment system. , High performance Cost reduction, reduction in maintenance costs, can be reduced in size or the like.

Further, a plurality of treatment tanks for performing various treatments on the water to be treated, air supply means for supplying air used for various purposes such as treatment in each treatment tank and transfer between the treatment tanks, Air flow switching means having a plurality of air outlets that can be switched and controlled with respect to one air inlet into which air sent from the means flows. A control means for arranging and forming a pipe for sending air for each application so as not to intersect and controlling the air flow path switching means at a predetermined timing to supply air for a predetermined time for each application is provided. By doing so, the same effect as described above can be obtained, and the piping system of the entire system can be simplified to further reduce the size.

Further, the flow rate adjusting means for adjusting the flow rate according to each use is provided at the air outlet of the air flow path switching means, so that the flow rate for each use can be adjusted independently of the air supply means. It is possible to do.

In addition to the above-described effects, the flow rate adjusting means is provided with a check valve for preventing a backflow by elastic deformation by an elastic member, and adjusting the flow rate by changing the elastic force. It also has the effect of preventing backflow due to water pressure in the tank at the time of stoppage, and can prevent the piping from being clogged with sludge or the like without separately providing a check valve.

Further, by adjusting the flow rate by changing the opening area of the air outlet as the flow rate adjusting means, a desired flow rate can be realized only by narrowing the air outlet to the required flow rate. So simplification of the configuration,
Cost reduction can be achieved.

Further, the air flow path switching means is provided with position detecting means for detecting the position of each air outlet including a specific position when each air outlet makes a round, and the control means is provided with the position detecting means. Since the air flow path switching means is controlled based on the specific position detection output of the means and the other position detection output following it, even if the power is cut off due to a power failure, etc., it should be started correctly without malfunction when restarting Can be.

If the switching is not completed within a certain period of time based on the time required for the air flow switching by the air flow switching means, the control means indicates that the air flow switching means is abnormal. By performing the abnormal output, it is possible to quickly detect that a failure has occurred in the air flow path switching means, and it is possible to shorten the system stop time due to maintenance and inspection.

Further, a bypass path for flowing air from the air supply means to a specific flow path without passing through the air flow path switching means,
By providing a bypass valve that allows air from the air supply means to flow to a specific flow path via the bypass path when an abnormality occurs in the air flow path switching means, it is possible to provide a bypass valve until parts replacement is completed based on the detection result. During this period, measures to minimize damage to the system (bypass path) can be taken.

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.

In particular, by mounting the check valve at the base of the air diffuser, the volume of compressed air is minimized, and there is almost no backflow, which is more effective.

The air flow switching means has an air inlet in the direction of the rotation axis, a rotor having an air outlet communicating with the air inlet in the circumferential direction, and a rotatable rotor. And has an air inlet in the direction of its rotation axis,
A housing having a plurality of air outlets in the circumferential direction, and a motor that rotationally drives the rotor so that the air outlet communicates with one of the air outlets of the housing make it relatively easy. With a simple configuration, the number of branches can be increased, and control becomes simple.

Further, by directly connecting the air inlet of the rotor and the air supply means with a flexible hose, the air from the air supply means directly enters the air inlet of the rotor. Air leakage at the time of inflow can be completely prevented.

Furthermore, by forming one or more loops on the flexible hose, the hose can be prevented from twisting.

Further, by providing a control means for driving the rotor to rotate within the range of 0 ° to 360 °, it is possible to prevent the hose from being twisted or disconnected, and to prevent damage due to the twist.

Further, by providing the control means for stopping the air supply means when the rotor is rotating, the position of the rotating rotor is not shifted or damaged by the air pressure from the air supply means. , The failure is reduced. Further, it is possible to prevent a problem that air leaks into a flow path other than a target flow path during rotation.

Further, by making the inner diameter of the air outlet in the housing larger than the inner diameter of the air outlet in the rotor, the pressure of the outflowing air becomes smaller at the boundary of the air outlet of the rotor. Time leakage can be suppressed.

Further, by connecting the air inlet of the rotor and the air supply means via a joint slidable by 360 ° or more, air leakage at the time of inflow can be suppressed and control can be simplified. Also, since the piping can be set arbitrarily, the flexibility of the piping is improved.

On the other hand, by forming a ventilation hole for guiding air leaking through the gap between the housing and the rotor to the motor, the air leak can be effectively used for cooling the motor.

Further, an air outlet which requires a small flow rate is disposed on both sides of the air outlet which requires a large flow rate, and a rotor is used when air is discharged from the air outlet which requires a large flow rate. The air leaking from the air outlet of the rotor to the gap between the rotor and the housing is caused to flow out of the air outlet that requires a small flow rate, for example, to promote air leakage during aeration performed for the longest time to promote sedimentation. The aeration is carried out for a long time, although the amount of air is small, although the amount of air is small. Therefore, a uniform precipitation promoting effect can be achieved without disturbing the interface of the precipitate.

Further, the air flow path switching means includes a branch pipe for branching the air from the air supply means into a plurality of pieces, a flexible hose connected to each outlet of the branch pipe, and a flexible hose. By composing a roller that squeezes other than the hose used, and a motor that drives this roller,
There is an effect that processing accuracy at the time of manufacturing is not so required.

Further, the air flow path switching means includes a disk-shaped housing having an air inlet on one side and a plurality of air outlets on a peripheral portion on the other side, and the air outlet in the housing. And a closing member which is urged by the elastic member to close the corresponding air outlet, and which is rotatably provided inside the closing member and biases one of the closing members by the urging force of the elastic member. And a motor for rotating the cam to open the corresponding air outlet by moving in opposition to the above, so that processing accuracy at the time of manufacture is not so required, and since it is thin, A compact air flow switching device can be realized.

Further, the air flow path switching means includes a disk-shaped housing having an air inlet at a central portion on one side and a plurality of air outlets around the air inlet, and the air outlet in the housing. A closing member formed correspondingly and formed of an elastic member to close the corresponding air outlet, and one of the closing members provided rotatably inside these closing members against its elastic force. By forming a cam that moves to open the corresponding air outlet and a motor that rotationally drives the cam, as described above, processing accuracy at the time of manufacture is not so necessary, and since it is thin, A compact air flow switching device can be realized.

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 this flat surface is closely contacted with the flat surface of the housing by an elastic member, and the flat surface is connected to the air inlet of the housing by one side. By including a rotor having a communication groove communicating with the air outlet and a motor for rotating the rotor, processing accuracy at the time of manufacture is not so required, and air leakage can be further reduced. In addition, since a cam and the like are not required, the configuration is simplified.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing an embodiment of a water treatment system according to the present invention, wherein FIG. 1 (a) is an overall view and FIG. 1 (b) is a cross-sectional view of the air flow switching device.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a timing chart showing the operation of the embodiment.

FIGS. 4A and 4B are diagrams for explaining the state of the precipitate in the flow rate adjusting tank and the sedimentation separation tank in the above embodiment. FIG. 4A shows an undesired state during air lift, and FIG. .

FIG. 5 is a longitudinal sectional view showing one embodiment of a flow rate adjusting mechanism of the air flow path switching device.

FIG. 6 is a longitudinal sectional view showing another embodiment of the flow rate adjusting mechanism of the air flow path switching device.

FIG. 7 is a view showing an embodiment in which a check valve is attached to a base portion of an air diffuser, wherein (a) shows a case of a T-shaped air diffuser, and (b) shows a case of an L-shaped air diffuser. .

FIG. 8 is a system configuration diagram showing another embodiment of the water treatment system according to the present invention, wherein (a) is an overall view and (b).
2 is a cross-sectional view of the air flow switching device.

9A and 9B are configuration diagrams of an air flow path switching device having five branches, where FIG. 9A is a top view, FIG. 9B is a side view, and FIG. 9C is FIG.
(D) and (e) are plan views as viewed from the direction of arrow A in (b).

FIG. 10 is a view for explaining a switching operation of the air flow path switching device, wherein (a1) to (d1) are cross-sectional views, and (a2).
(D2) is a plan view seen from the direction of arrow A in FIG. 9 (b).

FIG. 11 is a main part configuration diagram of a water treatment system in which a countermeasure is taken when an abnormality occurs in the air flow path switching device.

FIG. 12 is a block diagram showing a control circuit of the water treatment system shown in FIG. 11;

FIG. 13 is a flowchart showing an air flow path switching routine of the water treatment system shown in FIG. 11;

FIG. 14 is a longitudinal sectional view for explaining air leakage of the air flow path switching device.

FIG. 15 is a longitudinal sectional view showing an embodiment of an air flow path switching device in which measures for preventing air leakage are taken.

FIGS. 16A and 16B are diagrams showing a connection state of a hose from a blower connected to the air flow path switching device of FIG. 15, wherein FIG. 16A shows an initial position, and FIG.

FIG. 17 is a longitudinal sectional view showing another embodiment of the air flow path switching device in which measures for preventing air leakage are taken.

FIG. 18 is a diagram showing a control mode of the air flow switching device as described above.

FIG. 19 is a diagram showing a difference in inner diameter between each air outlet of the rotor and the housing of the air flow switching device.

FIG. 20 is a longitudinal sectional view showing still another embodiment of the air flow path switching device in which air leakage prevention measures are taken.

FIGS. 21A and 21B are diagrams showing an embodiment in which air leakage of an air flow path switching device is used for cooling a motor, and FIG.
(B) is a plan view seen from the direction of arrow A, (c) is a plan view further showing the motor by a broken line, (d) is a plan view seen from the direction of arrow B in (a), (e). () Is a plan view further showing the motor by a broken line.

FIGS. 22A and 22B are system configuration diagrams showing another embodiment of a water treatment system using air leakage of the air flow path switching device for accelerating sedimentation, wherein FIG. 22A is an overall view and FIG. FIG. 4 is a cross-sectional view of the switching device.

FIGS. 23A and 23B are schematic diagrams showing another embodiment of the air flow switching device, wherein FIG. 23A is an overall view, and FIGS. 23B to 23D are cross-sectional views showing states of respective branched hoses. .

FIGS. 24A and 24B are configuration diagrams showing still another embodiment of the air flow path switching device, wherein FIG. 24A is a bottom view and FIG.

25 is a schematic configuration diagram showing a modification of the configuration shown in FIG. 24, wherein (a) is a cross-sectional view showing a state in which an air outlet is open;
(B) is a bottom view, and (c) is a cross-sectional view showing a state where an air outlet is closed.

FIGS. 26A and 26B are configuration diagrams showing still another embodiment of the air flow path switching device, wherein FIG. 26A is a bottom view and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Flow control tanks 11 and 12, air lift pump (pipe) 20 solid-liquid separation device 30 compost device 40 aeration tank 50 sedimentation separation tank 51 air lift pump (pipe) 60 blower 61 hose 70 air flow switching device 71 rotor R0 air flow Inlet R1 Air outlet 72 Housing H0 Air inlet H1 to H6 Air outlet 73 Motor 73a Motor holder 73b Vent hole 74 Rotating shaft 75 Positioning rotary plate 76 Micro switch 77a, 77b Bearing 78, 78a, 78b Rubber packing 79 Joint 81 -86 Air pipe 81a, 85a, 86a Air diffuser 87 Bypass path 87a Bypass valve 90 Check valve 100 Microcomputer 101 Operation display section 102 Bypass path switching section 170 Air flow path switching device 171 Branch pipes 171a to 171c Flexible hose 172 Housing 173 Motor 175 Squeezing roller 270 Air flow switching device 272 Housing 273 Motor 274 Spring 274a Elastic plate 275 Open / close button 275a Depressed portion 277 Flange 278 Cam 370 Air flow switching device 371 Rotor 371a Communication groove 372 Housing 373 Spring 376 packing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshihiro Tanimoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Toshihiro Tamura 2-chome Keihanhondori, Moriguchi-shi, Osaka No. 5-5 Sanyo Electric Co., Ltd. (72) Inventor Norimasa Sakamoto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka F-term in Sanyo Electric Co., Ltd. 4D003 AB15 AB18 CA03 FA05 4D028 AB00 BC18 BC24 CA09 CA10 CB08 4D029 AA01 AB05 BB10

Claims (23)

[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 flow switching means having a plurality of air outlets switchable to one air inlet into which air supplied from the supply means flows, and each air outlet of the air flow switching means A control means for controlling the air flow path switching means at a predetermined timing and supplying air for a predetermined time for each use, while arranging and forming a pipe in the order of sending air for each use. A water treatment system, characterized in that: 2. A plurality of treatment tanks for performing various treatments on the water to be treated, air supply means for supplying air used for each application such as treatment in each treatment tank and transfer between the treatment tanks, Air flow switching means having a plurality of air outlets switchable to one air inlet into which air supplied from the supply means flows, and each air outlet of the air flow switching means And a control means for supplying air for a predetermined time for each application by controlling the air flow path switching means at a predetermined timing while arranging and forming a pipe for sending air for each application so as not to intersect. A water treatment system comprising: 3. An air outlet of the air flow path switching means,
The water treatment system according to claim 1, further comprising a flow rate adjusting unit that adjusts a flow rate according to each application. 4. The water flow according to claim 3, wherein the flow rate adjusting means includes a check valve for preventing backflow by elastic deformation by an elastic member, and the flow rate is adjusted by changing the elastic force. Processing system. 5. The water treatment system according to claim 3, wherein the flow rate adjusting means adjusts the flow rate by changing an opening area of an air outlet. 6. The air flow path switching means includes a position detecting means for detecting a position of each air outlet including a specific position when each air outlet makes a round, and the control means is adapted to detect the position of the air outlet. The water treatment system according to any one of claims 1 to 5, wherein the air flow path switching means is controlled based on a specific position detection output of the means and another position detection output subsequent thereto. 7. The control means, if the switching is not completed within a certain period of time based on a time required for switching the air flow path in the air flow switching means, indicates that the air flow switching means is abnormal. The water treatment system according to any one of claims 1 to 6, wherein an abnormal output indicating the following is performed. 8. A bypass path for flowing air from said air supply means to a specific flow path without passing through said air flow path switching means, and a bypass path from said air supply means when an abnormality occurs in said air flow path switching means. The water treatment system according to claim 7, further comprising a bypass valve for flowing air to a specific flow path via the bypass path. 9. 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 piping to diffuse air into the water to be treated. The water treatment system according to any one of claims 1 to 8, further comprising: 10. The water treatment system according to claim 9, wherein the check valve is attached to a base of the air diffuser. 11. A rotor having an air inlet in a direction of a rotation axis, an air outlet communicating with the air inlet in a circumferential direction, and a rotatable rotor. And a housing having an air inlet in the direction of its rotation axis and having a plurality of air outlets in the circumferential direction, and the rotor having the air outlet in one of the air outlets of the housing. The water treatment system according to any one of claims 1 to 10, further comprising a motor that is rotationally driven to communicate with the water. 12. The water treatment system according to claim 11, wherein an air inlet of said rotor and said air supply means are directly connected by a flexible hose. 13. The water treatment system according to claim 12, wherein one or more loops are formed in the flexible hose. 14. The water treatment system according to claim 12, further comprising control means for rotating and driving said rotor within a range of 0 ° to 360 °. 15. The water treatment system according to claim 11, further comprising control means for stopping said air supply means when said rotor rotates. 16. The water treatment system according to claim 11, wherein an inner diameter of the air outlet in the housing is larger than an inner diameter of the air outlet in the rotor. 17. The water treatment system according to claim 11, wherein the air inlet of the rotor and the air supply means are connected via a joint slidable by 360 ° or more. 18. The water treatment system according to claim 11, wherein a ventilation hole for guiding air leaking through a gap between the housing and the rotor to the motor is formed. 19. An air outlet requiring a small flow rate is disposed on both sides of an air outlet requiring a large flow rate, and a rotor is used when air is discharged from the air outlet requiring a large flow rate. 19. The water treatment system according to claim 11, wherein air leaking from the air outlet of the rotor to the gap between the rotor and the housing flows out from the air outlet requiring a small flow rate. 20. A branch pipe for branching the air from the air supply means into a plurality of pieces, a flexible hose connected to each outlet of the branch pipe, and each flexible hose. The water treatment system according to any one of claims 1 to 10, comprising: a roller that squeezes a hose other than a used hose; and a motor that drives the roller. 21. A disk-shaped housing having an air inlet on one side and a plurality of air outlets on a peripheral portion on the other side, and the air outlet in the housing. And a closing member which is urged by the elastic member to close the corresponding air outlet, and which is rotatably provided inside the closing member and biases one of the closing members by the urging force of the elastic member. The water treatment system according to any one of claims 1 to 10, comprising: a cam that moves against the opening to open a corresponding air outlet, and a motor that rotationally drives the cam. 22. The air flow switching means has a disk-shaped housing having an air inlet at a central portion on one side and a plurality of air outlets around the air inlet, and the air outlet in the housing. A closing member formed correspondingly and formed of an elastic member to close the corresponding air outlet, and one of the closing members provided rotatably inside these closing members against its elastic force. The water treatment system according to any one of claims 1 to 10, comprising a cam that moves to open a corresponding air outlet, and a motor that rotationally drives the cam. 23. A housing in which said air flow path switching means is formed such that 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 this flat surface is closely contacted with the flat surface of the housing by an elastic member, and the flat surface is connected to the air inlet of the housing by one side. 2. A motor comprising: a rotor having a communication groove communicating with an air outlet; and a motor for rotating the rotor.
The water treatment system according to claim 10.