JP3249102B2 - Aeration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration apparatus for removing contaminants and the like in a liquid, and more specifically, sends air into a liquid such as a water tank containing the contaminants and attaches the contaminants to bubbles. The present invention relates to an aeration device for purifying a liquid by removing the attached air bubbles.

[0002]

2. Description of the Related Art An aeration apparatus according to the present invention is used for aquaculture,
It is a removal device that removes pollutants from water in a water tank in the field of live fish transport, fish breeding, etc., or removes pollutants from rice juice in the food industry. This is a device that generates a plurality of air bubbles in the inside and attaches pollutants to the air bubbles to process the air bubbles.

Hereinafter, a conventional aeration apparatus will be described with reference to FIG. 100 is an aeration device. The aeration apparatus 100 pumps contaminated water mixed with contaminants and the like from a water tank 101 into a pump 102.
And polluted water is supplied from the upper part of the stirring water tank 103. Then, the supplied contaminated water is supplied to the stirred water tank 103.
Is returned to the water tank 101 again while the flow rate is adjusted by the valve 104 from below. The valve 104 is controlled by the sensor 105 so that the supplied contaminated water is always supplied to the top of the contaminated water tank 103.

On the other hand, the aeration apparatus 100 has a hollow cylindrical shape and has a plurality of small holes formed at one end of a cylindrical surface, and stirring blades are attached in a radiation direction from the cylindrical surface having the small holes. A stirrer 107 rotated by a motor 106 attached to the other end is mounted in the stirred water tank 103 from above. Then, the stirring device 107 is set in the stirring water tank 103.
To rotate. Then, the stirring device 1 in the stirring water tank 103
07 rotates, the stirring device 10 in the stirring water tank 103 is rotated.
The small hole formed at the tip of the nozzle 7 has a negative pressure due to the rotation of the stirring blade, and discharges the air in the hollow portion of the cylinder inserted into the end to which the motor 106 is inserted into the stirring water tank 103.
The released air becomes bubbles and floats upward in the polluted water in the stirred water tank 103. At that time, the pollutants in the polluted water are attached to the bubbles 108 and rise to the top of the polluted water together with the bubbles 108.

[0005] At the top of the polluted water tank 103, there is provided a bubble discharge duct 109 capable of discharging air bubbles floating at the top of the polluted water, and further, a tip of the bubble discharge duct 109 forms a discharge port 110 which is opened downward. Since the air bubbles 108 are generated sequentially, the air bubbles 108 are sequentially stacked, and as the air bubbles 108 are stacked, the air bubbles 108 are sequentially pushed by the lower air bubbles 108 and discharged from the outlet 110 via the exhaust duct 109. A waste tank 111 is provided below the discharge port 110, and the discharged air bubbles 108 are accumulated in the waste tank 111, and the water film and the pollutants forming the air bubbles 108 are sequentially discharged by the disappearance of the air bubbles 108. Had been discarded from 112.

[0006]

However, in the conventional aeration apparatus 100, for example, in the case of polluted water in which the air bubbles 108 are unlikely to be generated, the water level must be set to just below the lower surface of the air discharge duct 109. In this case, when the water surface fluctuates due to the stirring, the contaminated water is removed from the waste duct 1.
There is a problem that it is discarded from the discharge port 110 via 09. The generated bubbles 108 are different depending on the type of the polluted water, for example, seawater or fresh water. If the level of the polluted water is made much lower than the lower surface of the waste duct 109, the generated bubbles 108 The air bubbles 108 that have floated on the part will naturally disappear before being discarded and cannot be efficiently discarded, or if the air bubbles 108 are located on the contaminated water for a too long time, the pollutants attached to the surface of the air bubbles 108 There is a problem that the air bubbles are sequentially moved downward, so that the polluted substances are not attached much to the discarded bubbles 108 and the polluted substances cannot be efficiently discarded.

Accordingly, the present invention has been made in view of these problems,
It is an object to efficiently dispose of pollutants attached to bubbles 108.

[0008]

Means for Solving the Problems In order to solve these problems, according to the present invention,

A polluted water tank capable of storing polluted water, and one end is located so as to be located in the polluted water stored in the polluted water tank and the other end is located outside the polluted water layer. It is composed of a stirrer capable of generating air bubbles and stirring bubbles in the polluted water, a pumping section for supplying the polluted water into the polluted water tank, and a drain section for draining the polluted water out of the polluted water tank. Pumping and draining device, and a foam outlet provided at the top of the polluted water tank and capable of discharging bubbles generated by the stirring device,
An upper water level sensor capable of detecting a water level immediately before the polluted water pumped into the polluted water tank overflows from the discharge port and capable of outputting a detection signal, and an upper polluted water tank, and installed below the upper water level sensor, A lower water level sensor capable of detecting the water level of the polluted water and outputting a detection signal, and a water level signal from the upper water level sensor and the lower water level sensor can be inputted, and the amount of the contaminated water in the polluted water tank is set at every preset time. An aeration device, comprising: a control unit that controls the pumping and draining device to be at the lower water level sensor position and the upper water level sensor position;

And,

A polluted water tank capable of storing polluted water, and one end is located so as to be located in the polluted water stored in the polluted water tank and the other end is located outside the polluted water layer. It is composed of a stirrer capable of generating air bubbles and stirring bubbles in the polluted water, a pumping section for supplying the polluted water into the polluted water tank, and a drain section for draining the polluted water out of the polluted water tank. Pumping and draining device, and a foam outlet provided at the top of the polluted water tank and capable of discharging bubbles generated by the stirring device,
An upper water level sensor that is installed to be able to detect the water level immediately before the polluted water pumped into the polluted water tank overflows from the discharge port and can output a detection signal, and that can adjust the water level to be detected, and the upper part of the polluted water tank, and It is installed below the upper water level sensor,
It can detect the water level of the polluted water and output a detection signal, and can input the water level signals from the lower water level sensor and the upper water level sensor and the lower water level sensor that can adjust the water level to be detected. An aeration device, comprising: a control unit that controls the pumping and draining device so that the water amount becomes a lower water level sensor position and an upper water level sensor position every predetermined time.

The above-mentioned problem is solved by providing the above.
The operation of the present invention is as follows.

The polluted water is stored in the polluted water tank by the pumping and draining device. Then, the control unit inputs detection signals from the upper water level sensor and the lower water level sensor to monitor the water level, and raises the water level of the stored polluted water to the upper sensor position and the lower sensor position at predetermined time intervals. Control the drainage system. On the other hand, the stored contaminated water is agitated and supplied with air from the outside to generate bubbles and is stirred, and the bubbles are stirred in the contaminated water. The agitated bubbles float in the contaminated water while adhering the contaminants in the contaminated water, and float on the surface of the contaminated water. As bubbles rise sequentially on the surface of the polluted water,
Eventually, air bubbles are stacked on the water surface. Then, when the water surface of the contaminated water moves upward, the stacked bubbles are discharged from a discharge port provided at the upper part of the contaminated water tank.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described based on FIG. 1 which is an explanatory diagram of a front vertical cross section of an embodiment of the present invention and FIG. 2 which is an explanatory view of a stirring device.

1 is an aeration apparatus according to the present invention. As shown in FIG. 1, the aeration apparatus 1 is provided with a contaminated water W containing contaminants.
A purifying apparatus for removing pollutants from the polluted water W by suspending the bubbles B therein and attaching the pollutants to the bubbles B, a polluted water tank 2 for storing the polluted water W, and generating bubbles B to pollute. Stirring device 3 for stirring bubbles B in water W, polluted water tank 2
A pumping / draining device 4 for pumping and discharging the polluted water W, an upper sensor 5 and a lower sensor 6 provided in the polluted water tank 2 and capable of detecting the water level of the polluted water tank 2, based on detection signals from the upper sensor 5 and the lower sensor 6. Control unit 7 for controlling pumping device 4
Consists of

Reference numeral 8 denotes a water tank that is a water source of the polluted water W.
The water tank 8 is a polluted water source that supplies the polluted water W to the aeration apparatus 1. In this embodiment, the water tank 8 is a tank for transporting live fish. The aquarium 8 is a live aquarium for transporting live fish in this embodiment, but is a larger aquarium used for aquaculture or a tank for storing polluted water containing pollutants such as rice sap in the food industry. Further, in the case of the polluted water W such as rice sap, it may be configured to supply the water directly from the rice sap tank.

As shown in FIG. 1, the polluted water tank 2 has a cylindrical tank section 21 capable of storing the polluted water W therein, and a supply section for supplying the polluted water W to the upper side surface of the tank section 21. The mouth 22 is drilled. In addition, a drain port 23 for draining water from the tank 21 is formed in a lower side surface of the tank 21. Furthermore, the polluted water tank 2
Is provided at the upper part of the tank 2 for discharging bubbles generated in the polluted water tank 2 to which the pollutant adheres to the outside of the polluted water tank 2. As shown in FIG. 2, the stirrer 3 is provided with a blade 32 for stirring at a lower portion of a hollow cylindrical tube 31, and further, bubbles are formed on an end side surface of the tube 31 to which the blade 32 is attached. A hole 33 to be generated is drilled. A motor 34 is attached to the upper end of the tube 31.
The tube 31 can be rotated by rotating the tube 31, and the wing 32 attached to the tip rotates by rotating the tube 31. The stirrer 3 configured as described above is mounted such that the motor 34 is located outside the tank 21 and the blade 32 at the tip is located below the tank 21, and is rotated into the tank 21 by rotation. The blade 32 can stir the polluted water W to be stored. At this time, the wings 32 rotate in the polluted water W, so that a negative pressure is generated near the wings 32, and the air supplied along the pipe 31 is discharged from the holes 33 and becomes bubbles B in the contaminated water W. And is supplied by being stirred by the blade 32.

Reference numeral 25 denotes a baffle plate, which suppresses rotation of the contaminated water W in the tank 21 when the contaminated water W in the tank 21 is stirred by the stirring device 3. By providing the baffle plate 25, the efficiency of the aeration process can be improved.
26 is a guide plate. The guide plate 26 is for preventing the bubble B generated in the hole 33 of the stirring device 3 from being drained from the drain port 23 without rising. Therefore, by providing the guide plate 26, the generated bubbles B always rise, so that it is possible to improve the efficiency of the aeration process.

The pumping / draining device 4 includes a pumping section 41 which draws up the polluted water W from the water tank 8 and supplies the polluted water to the polluted water tank 2, and a drainage section 42 which returns the purified polluted water W from the polluted water tank 2 to the water tank 8.
Consists of The water pumping section 41 is composed of a so-called water pump. The water pipe 43 whose tip is installed in the water tank 8 and the water pipe 44 whose tip is installed in the supply hole 22 of the polluted water tank 2 are connected. The polluted water W is pumped into the polluted water tank 2. The drainage part 42 is formed of a so-called electromagnetic valve capable of controlling a flow rate, and a water pipe 45 whose tip is installed in the water tank 8.
Is connected to a water pipe 46 whose tip is installed at the drain port 23 of the polluted water tank 2, and the purified polluted water W in the polluted water tank 2 is
Can be returned to the water tank 8. The electromagnetic valve serving as the drainage section 42 varies the flow rate under the control of the control section 7 described later.

The upper sensor 5 is installed on the side surface of the tank 21 at a position slightly lower than the lower part of the foam discharge duct 24, and the contaminated water W
When the water level reaches the position of the upper sensor 5, the water level is detected and a detection signal is output. The upper sensor 5 is configured to be able to move a detection portion (not shown) up and down and to adjust the position of the upper water level of the polluted water W. The movement adjustment of the upper water level is configured to be automatically adjustable by the control unit 7, but may be configured to be manually adjustable.

The lower sensor 6 is similar to the upper sensor 5 in the tank section 2.
1 is installed at a relatively low water level where the air bubbles B are sufficiently stacked on the water surface of the polluted water W, and the water level of the polluted water W is lower than that of the lower sensor 6. When it reaches, it detects the water level and outputs a detection signal.
The lower sensor 6 is configured to be able to move a detection part (not shown) up and down and to adjust the position of the lower water level of the polluted water W. The movement adjustment of the lower water level is configured to be automatically adjustable by the control unit 7, but may be configured to be manually adjustable.

The control unit 7 is electrically connected to the electromagnetic valve serving as the drainage unit 42 and is also electrically connected to the upper sensor 5 and the lower sensor 6, and detects the water level detected by the upper sensor 5 and the lower sensor 6. The signal can be received. Control unit 7
Then, when the upper sensor 5 detects the water level,
The electromagnetic valve is opened to a predetermined amount, and the drainage amount is increased to prevent the polluted water W from overflowing from the discharge duct 24 and to control the water storage amount to be gradually reduced. When the lower sensor 6 no longer detects the water level, the control unit 7 closes the electromagnetic valve, which is the drainage unit 42, by a predetermined amount to reduce the drainage amount, and the polluted water W is gradually accumulated in the tank unit 21. Control to be watered. The control unit 7 controls the drainage unit 42 in advance.
The water level can be raised and lowered between the water level position of the upper sensor 5 and the water level position of the lower sensor 6 depending on the opening and closing amount of the electromagnetic valve. When the lower sensor 6 does not detect the contaminated water W while the upper sensor 5 does not detect the contaminated water W, the controller 7 supplies the contaminated water W supplied into the contaminated water tank 2 by the pumping unit 41. The open state of the electromagnetic valve serving as the drainage unit 42 is set in advance so that the amount of the drainage unit 42 is larger than the amount of returning the purified polluted water W to the water tank 8. By setting this open state, the amount of the polluted water W in the polluted water tank 2 per unit time can be increased, and the time until the polluted water W changes from the position of the lower sensor 6 to the position of the upper sensor 5 can be set. The control unit 7
Then, when the upper sensor 5 inputs a detection signal for detecting the contaminated water W, the open state of the electromagnetic valve, which is the drainage unit 42, is reduced to drain the water to the water tank 8 and the pumping unit is determined based on the drainage amount of the purified contaminated water W. The amount of polluted water W supplied by 41 is set in advance so as to be small. By adjusting the amount of drainage per unit time in the same manner as described above, the time until the lower sensor 6 no longer detects the polluted water W can be set in advance.

Reference numeral 9 denotes a waste storage tank. The waste storage tank 9 is a tank for storing the air bubbles B discharged from the air discharge duct 24, and the water film and the pollutant that have formed the air bubbles B by disappearing the air bubbles B in the stored state are solid or , And becomes a liquid, and is discarded from the disposal port 10.

Next, the aeration apparatus 1 configured as described above.
The operation of will be described. Dirty water W is already stored in the polluted water tank 2, the amount of water is between the upper sensor 5 and the lower sensor 6, and the state in which the amount of water is increasing will be described. When the motor 34 of the stirring device 3 rotates, the tube 31 rotates. Then, the blade 32 fixed to the tip of the pipe 31 in the polluted water W rotates, and a negative pressure is generated as the blade 32 rotates. Since a negative pressure is generated in the wing portion 32, the air in the pipe 31 is generated as bubbles B from the perforated hole 33 into the polluted water W, and is agitated by the wing 33 and diffuses into the polluted water W. . Diffused bubble B
Floats while causing the contaminants in the contaminated water W to adhere to the surface of the contaminated water W.

As described above, the contaminants of the contaminated water W are attached to the floating bubbles B and purified. Purified polluted water W
Is returned to the water tank 8 via the water distribution pipes 46 and 45 according to the open state of the electromagnetic valve which is the drainage part 42 of the pumping / draining device 4. On the other hand, the polluted water W is newly supplied to the polluted water tank 2 by the pumping section 41 of the pumping / draining device 4. The supply state of the contaminated water W is controlled by the control unit 7 by outputting a detection signal indicating that the upper and lower sensors 5 and 6 installed in the contaminated water tank 2 have detected the water level to the control unit 7.

The amount of the polluted water W is currently increasing, and the bubbles B to which the pollutant adheres are stacked on the surface of the polluted water W. Then, the amount of the polluted water W is sequentially increased, and the amount of the air bubbles B to which the pollutant adheres is also increased in accordance with the increased amount. As the amount of the bubbles B increases, the bubbles B are sequentially discharged from the discharge duct 24 provided at the upper part of the tank 21. However, the polluted water W is not drained. When the water level of the polluted water W reaches the position of the upper sensor 5, the upper sensor 5 outputs a detection signal for detecting the water level to the controller 7. At this time, since the water level detected by the upper sensor 5 is slightly lower than the lower end position of the foam discharge duct 24, the polluted water W is not discharged from the foam discharge duct 24.

The control unit 7 controls the open state of the electromagnetic valve, which is the drainage unit 42, to a preset state since the upper sensor 5 receives the detection signal of detecting the polluted water W.
Then, the drainage amount of the polluted water W drained by the electromagnetic valve as the drain portion 42 per unit time is made larger than the supply amount of the polluted water W supplied by the pumping portion 41 per unit time. The amount of polluted water W gradually decreases. The degree of this decrease can be adjusted by adjusting the opening / closing amount of the electromagnetic valve which is the drainage unit 42 set in advance.

Since the supply amount of the polluted water W to the tank portion 21 has been reduced, the pollutant adheres to the generated bubble B while the pollutant adheres to the generated bubble B while the polluted water W amount gradually decreases. And continue to be sequentially laminated. Eventually, the amount of the contaminated water W becomes smaller than the position of the lower sensor 6, and the lower sensor 6 outputs a detection signal to the control unit 7 indicating that the water level is no longer detected.
Since the lower sensor 6 no longer detects the water level, the control unit 7 controls the open state of the electromagnetic valve, which is the drainage unit 42, to a preset state. Then, the amount of polluted water W per unit time supplied by the pumping unit 41 into the tank unit 21 is reduced by the drainage unit 42.
The amount of the polluted water W in the tank portion 21 gradually increases because the electromagnetic valve, which is described above, returns more than the amount of the polluted water W purified to the water tank 8 per unit time.

Each time the level of the contaminated water W in the tank section 21 is raised and lowered between the upper sensor 5 and the lower sensor 6, the stacked bubbles B are discharged from the discharge duct 24. The air bubbles B discharged from the air discharge duct 24 are stored in the liquefied water storage tank 9, and the air bubbles B are crushed in the stored state, become a liquid containing a pollutant, and are discarded from the waste port 10 to the outside of the system. Is discharged.

In this embodiment, the control unit 7 controls the amount of the polluted water W by the upper sensor 5 and the lower sensor 6.
Although the opening degree of the electromagnetic valve, which is the drainage unit 42, was adjusted in advance so as to slowly move up and down, a separate timer (not shown) was provided in the control unit 7, and the lower sensor 6
When no longer detects the polluted water W, the opening degree of the electromagnetic valve, which is the drainage unit 42, is increased by the timer (not shown) until the predetermined time set in advance by the timer (not shown). Set to discharge the same amount of water as
After an elapse of a predetermined time set in advance, the opening degree of the drainage section 42 is controlled so that the drainage amount is smaller than the water amount supplied by the pumping section 42 again, or the drainage amount is set to 0, and the water amount of the tank section 21 is reduced. You may comprise so that it may increase. Similarly,
Even when the upper sensor 5 detects the contaminated water W, the pumping unit 41 supplies the opening of the electromagnetic valve, which is the drainage unit 42, to the tank unit 21 until a predetermined time set in advance by a timer (not shown) elapses. It is set to discharge the same amount of water as the amount of water to be discharged, and after a predetermined time elapses, the opening degree of the drainage unit 42 is controlled again so that the amount of drainage becomes larger than the amount of water supplied by the pumping unit 42, and the tank unit is controlled. 21 may be configured to increase the amount of water. In this embodiment, the control unit 7 controls the drainage unit 42 to adjust the amount of water in the tank unit 21. However, the control unit 7 may control the amount of water supplied to the tank unit 21 by the pumping unit 41. Alternatively, both the pumping unit 41 and the draining unit 42 may be adjusted. As described above, between the upper sensor 5 and the lower sensor 6 based on the detection information of the polluted water W detected by the upper sensor 5 and the lower sensor 6. It is only necessary that the water level of the polluted water W can be controlled up and down.

[0031]

As described above, according to the present invention, even in the case of the polluted water W in which the bubbles B are unlikely to be generated, the bubbles B are generated when the water surface of the polluted water W is moving downward. By laminating on the W water surface and then moving the water surface upward, the air bubbles B can be efficiently discharged from the discharge duct 24, and the water surface of the polluted water W does not stop at the position of the upper sensor 5 from beginning to end. The amount of the polluted water W discharged from the foam duct 24 is almost eliminated. Also, even if a difference occurs in the generated bubbles B due to the type of the polluted water W, the vertical surface cycle of the polluted water W is adjusted so that the water surface comes to the position of the upper sensor 5 before the bubbles B disappear. By adjusting the control of the control unit 7 by the bubble B generated by the previously used polluted water W, it is possible to cope with various polluted waters W, and it is possible to adjust it efficiently and by automatic control.

[Brief description of the drawings]

FIG. 1 is an explanatory front vertical sectional view of an embodiment of the present invention.

FIG. 2 is an explanatory view of a stirring device.

FIG. 3 is an explanatory view of a conventional example.

[Explanation of symbols]

 W Contaminated water B Bubble 1 Aeration device 2 Contaminated water tank 21 Tank part 22 Supply port 23 Drain port 24 Drainage duct 25 Baffle plate 26 Induction plate 3 Stirrer 31 Pipe 32 Blade 33 Hole 34 Motor 4 Pumping device 41 Pumping unit 42 Drain Unit 43 Water pipe 44 Water pipe 45 Water pipe 46 Water pipe 5 Upper sensor 6 Lower sensor 7 Control unit 8 Water tank 9 Bubble liquefied water storage tank 10 Disposal port

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) C02F 1/24

Claims (2)

(57) [Claims] 1. A polluted water tank capable of storing polluted water, one end of which is located in the polluted water stored in the polluted water tank and the other end of which is located outside the polluted water layer. A stirrer that can generate air bubbles and agitate air bubbles in the polluted water, a pumping unit that supplies the polluted water into the polluted water tank, and a drain unit that drains the polluted water out of the polluted water tank. The pumping / draining device that is constructed, a bubble outlet provided at the top of the polluted water tank and capable of discharging air bubbles generated by the stirrer, and a water level immediately before the polluted water pumped into the polluted water tank overflows from the bubble outlet. An upper water level sensor that is installed so as to be able to detect and output a detection signal; and a lower water level sensor that is installed above the polluted water tank and below the upper water level sensor and that can detect the water level of the polluted water and output a detection signal. Upper and lower water level sensors And a control unit for controlling the pumping and draining device so that the amount of polluted water in the polluted water tank is at the lower water level sensor position and the upper water level sensor position at preset time intervals. And aeration device. 2. A polluted water tank capable of storing polluted water, wherein one end is located in the polluted water stored in the polluted water tank and the other end is located outside the polluted water layer. A stirrer that can generate air bubbles and agitate air bubbles in the polluted water, a pumping unit that supplies the polluted water into the polluted water tank, and a drain unit that drains the polluted water out of the polluted water tank. The pumping / draining device that is constructed, a bubble outlet provided at the top of the polluted water tank and capable of discharging air bubbles generated by the stirrer, and a water level immediately before the polluted water pumped into the polluted water tank overflows from the bubble outlet. An upper water level sensor that is installed so as to be able to detect and can output a detection signal and that can adjust the water level to be detected, and is installed above the polluted water tank and below the upper water level sensor to detect the water level of the polluted water and detect the detection signal. Can be output and the detected water level can be adjusted. Possible lower water level sensors, and water level signals from the upper water level sensor and the lower water level sensor can be input so that the amount of polluted water in the polluted water tank becomes the lower water level sensor position and the upper water level sensor position every preset time. An aeration device, comprising: a control unit for controlling a pumping and draining device.