JPH05103905A - Bubble separation equipment - Google Patents

Abstract

PURPOSE:To provide an equipment for efficiently removing material to be separated to form treated liquid irrespective of the change in concentration of the material to be separated in feed liquid. CONSTITUTION:When foams formed by making material to be separated in feed liquid stick to bubbles generated by a bubble generator 2 is accumulated over the liquid surface 8 of a separation tack 1, liquid level adjusting means 6, 13, 14, 15 are operated by a control signal from a controller 16 to raise the liquid surface 8 of the separation tank 1, causing the removal of the foams to which the material to be separated sticks to be facilitated by a defoaming device 3. Thereby bubble separation equipment which has high concentration efficiency of material to be separated and forms treated liquid from which material to be separated is properly removed irrespective of the charge in concentration of material to be separated is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bubble separation device such as a waste water treatment device including a water treatment device such as a fish farm, an oil / water separation device and a fine powder concentrate separation device.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional air bubble separation device includes a separation tank 01 having a stock solution inflow portion 04 on its side, a bubble generation device 02 provided in the lower portion of the separation tank 01, and the above separation. Rotating blade 010 and motor 01 provided on the upper part of tank 01
A bubble removing device 03 having the above-mentioned 1, a processing liquid outflow portion 05 provided outside the separation tank 01 and communicating with the inside, a movable weir 06 provided at an upper end of a side wall 05a of the processing liquid outflow portion 05 and capable of being manually moved up and down, And a treatment liquid outlet 012 provided outside the treatment liquid outflow portion 05.

In the above description, the substance to be separated in the separation tank 01 supplied together with the stock solution from the stock solution inflow portion 04 adheres to the bubbles 7 generated in the tank 01 by the bubble generating device 02, and the bubbles 7 float up. Bubbles 9 were formed on the liquid surface 8.

The bubbles 9 generated on the liquid surface 8 are pushed up by the bubbles 9 generated one after another, but when moving upward, the liquid content contained in the bubbles 9 is reduced, and the bubbles 9 are separated. The thing is more concentrated.

The bubbles 9 pushed up on the liquid surface 8 are scooped out by the rotary blades 010 rotated by the motor 011. Therefore, the substances to be separated are removed together with the bubbles 9.
Further, the treatment liquid from which the substances to be separated have been removed as described above has flowed out of the treatment liquid outlet 012 through the treatment liquid outflow portion 05.

[0006]

The conventional apparatus has the following problems. (1) When the concentration of the substance to be separated is low, the amount of foam generated is small, and as a result, the height of the bubble is low and it does not reach the bubble removing device, so that the substance to be separated cannot be removed. (2) When the concentration of the substance to be separated is too high, the amount of bubbles generated is large and removal is easy, but since the bubbles are removed in a state where the amount of liquid contained in the bubbles is large, the amount of liquid is significantly increased. And the efficiency of concentrating the substance to be separated is low.

The present invention is intended to solve the above problems.

[0008]

A bubble separating device of the present invention comprises a bubble generating device, a bubble removing device, a separation tank provided with a stock solution inflow section, a processing solution outflow section communicating with the separation tank and an inside thereof. A bubble separation device having a processing liquid outlet provided adjacent to an outflow portion, comprising a liquid level adjusting means provided in the processing liquid outflow portion, and a control device connected to the liquid level adjusting means. It is characterized by

[0009]

In the above, normally, the liquid level in the separation tank and the processing solution outflow portion is lowered to a certain level, the undiluted solution is supplied from the undiluted solution inflow portion, and the undissolved solution is discharged from the undissolved solution outlet port. drive.

In the above separation tank, the bubbles generated by the bubble generator adhere to the substance to be separated contained in the undiluted solution and rise to generate bubbles in an amount corresponding to the concentration of the substance to be separated on the liquid surface. After that, a part of the bubbles in the upper part returns to the original liquid state, and the concentration of the substance to be separated in the bubbles is increased.

In the apparatus of the present invention, since the liquid level in the separation tank and the processing liquid outflow portion can be adjusted by the control unit and the liquid level adjusting means, the concentration of the substance to be separated in the foam becomes appropriate. After a certain period of time, the liquid level adjusting means is activated by the control signal from the control device to raise the liquid level to a level suitable for removing bubbles.

While the liquid level is in the ascending state, the object to be separated together with bubbles is removed by the bubble removing device, and then the liquid level is returned to the normal state by the liquid level adjusting means.

In the apparatus of the present invention, since the liquid level adjusting means is provided in the processing liquid outflow portion as described above so that the liquid level in the separation tank can be easily adjusted, regardless of the change in the concentration of the substance to be separated, (EN) An apparatus capable of producing a treatment liquid in which a substance to be separated is highly concentrated and a substance to be separated is appropriately removed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS.
In this embodiment shown in FIGS. 1 and 2, the bubble generating device 2 is provided at the bottom.
And a separation tank 1 provided with a bubble removing device 3 on the upper side and a stock solution inflow section 4 on the side, and the separation section 1 is arranged outside the separation tank 1 and communicates with the inside of the separation tank 1, and the outflow portion can be moved to the upper part of the side wall 5a In a bubble separation device including a processing liquid outflow portion 5 provided with a weir 6, and a processing liquid outlet 12 provided outside the outflow portion 5,
The drive device 13 and the drive device 13 coupled to the outflow-portion movable weir 6 provided on the side wall 5a of the processing liquid outflow portion 5.
And a drive device 15 and a control device 16 connected to the opening / closing device 14, and the movable weir 6, the drive device 13, the opening / closing device 14, and the driving source 15 connected to the outflow part. Adjustment means are formed. Since the present embodiment is the same as the conventional apparatus except for the related apparatus of the processing liquid outflow unit 5, detailed description thereof will be omitted.

In the above, the driving force such as hydraulic pressure, hydraulic pressure, pneumatic pressure or electricity supplied from the driving source 15 is applied to the control device 1.
6, which is controlled by an opening / closing device 14 formed of a solenoid valve or the like that is opened / closed in response to a command signal from 6, and is supplied to the drive device 13,
The drive device 13 drives the outflow-portion movable weir 6 guided by the guide 17 as shown in FIG.

Since the above-mentioned drive mechanism is connected to the outflow movable weir 6, the outflow movable weir 6 can be intermittently moved up and down according to the state of bubbles in the separation tank 1 by this drive mechanism. Since the liquid level 8 can be adjusted by raising and lowering the movable weir 6, it is possible to appropriately remove the substance to be separated in the stock solution.

In this embodiment, the intermittent movement of the movable weir of the outflow part is possible as described above, so that the treatment liquid in which the substance to be separated is always appropriately removed is removed regardless of the change in the concentration of the substance to be separated. It was possible to generate.

A second embodiment of the present invention will be described with reference to FIG. The present embodiment shown in FIG. 3 uses a rotary weir 19 rotated by a motor 18 via a transmission device 20 composed of a chain, a belt or the like, instead of the outflow movable weir 6 that moves up and down in the first embodiment. A surface adjusting means is formed to adjust the level of the liquid surface 8 by the rotation angle of the rotary weir 19, a belt skimmer is used as the bubble removing device 22, and the side wall 5a of the processing liquid outflow portion 5 is used. Switchgear 2
1 is provided.

The operation and effect of this embodiment are almost the same as those of the first embodiment. The motor 18 for rotating the rotary weir 19 is controlled in the same manner as in the first embodiment by a controller (not shown).

In FIG. 3, the switchgear 21 is added, but in this case, when the switchgear 21 is open and the control device closes the liquid level, the liquid equivalent to the rotary dam 19 is reached. Up to the surface, the liquid level in the separation tank rises and bubbles are discharged.
In this case, if the rotary weir 19 is finely adjusted, more precise discharge control can be performed.

A third embodiment of the present invention will be described with reference to FIG. In this embodiment shown in FIG. 4, the separation tank 1 with a lid is replaced with the separation tank 1 in the first embodiment. A processing liquid outflow pipe 25 is connected to the lower part of the side wall of the separation tank 23, and is arranged so that the inside of the processing liquid outflow portion 5 faces upward. Shaped movable weirs 24 are provided, and these play the role of the outflow portion movable weir 6 in the first embodiment.

A processing liquid concentration monitor 26 is provided at the processing liquid outlet 12 connected to the processing liquid outlet 5, and the monitoring device 26 is connected to the controller 16. This controller 16 is connected to the drive source 15,
The driving source 15 is a driving device 13 connected to the movable weir 24.
It is connected to the. In the present embodiment, the movable weir 24, the driving device 13, and the driving source 15 form a liquid level adjusting means.

In the above description, the movable weir 24 is moved up and down to adjust the liquid level 8 of the separation tank 23, which is the same as in the first embodiment. However, in the case of this embodiment, the substance to be separated in the treatment liquid is separated. Is characterized in that the concentration of the treatment liquid is detected by the treatment liquid concentration monitor device 26, and the movable weir 24 is moved up and down by the detection signal.

That is, the detection signal of the treatment liquid concentration monitor device 26 is input to the control device 16, and the control device 16 inputs the control signal to the drive source 15 to operate the drive device 13 to separate the substance to be separated in the treatment liquid. If the concentration is higher than the set value, it is determined that the separation is insufficient, and the movable weir 24 is raised so that the liquid level 9 in the separation tank 23 rises. If the concentration is low, the movable weir 24 is lowered to improve the processing capacity. The liquid level control by the treatment liquid concentration monitor device 26 can be replaced with the control by the monitor device for the concentration, weight and the like of the discharged bubbles.

A fourth embodiment of the present invention will be described with reference to FIG. In this embodiment shown in FIG. 5, the separation tank with a lid 23 is used as in the third embodiment, and the processing liquid outflow pipes 35, 3 are provided at the lower portions of the side walls thereof.
6, the processing liquid outflow pipe 35 used in the present embodiment has an opening 35a at the upper end, and an opening 35b is also provided at an intermediate side part, and the opening 35a is provided at the upper end. Is provided with a drive device 13 that opens and closes the opening 35a with packing, and an intermediate opening 35b is
Relief port 3 with packing 28, valve body 30 and valve rod 31
A cylinder device 27 provided with 3, 34 is provided. In this cylinder device 27, two pipe lines 29 connected to the discharge port of the pump 22 for supplying the stock solution to the lidded separation tank 23 are connected, one is directly, and the other one is the opening / closing device 2
1, and the opening / closing device 21 and the drive device 13 are connected to the control device 16. In this embodiment, the drive device 13 and the cylinder device 27 are used.
The opening / closing device 21, the processing liquid outflow pipes 35 and 36, and the pipe 29 form a liquid level adjusting means.

In the above, when there are many substances to be separated in the stock solution, the intermediate opening 35b is opened to bring the liquid level 8 of the separation tank 23 to this level. The opening 35b is opened / closed by a cylinder device 27 that utilizes the pressure of the liquid discharged from the pump 22, and the opening / closing device 21 including an electromagnetic valve opens / closes in response to a command from the control device 16, and the opening / closing device 21 closes. At this time, the packing 28 of the cylinder device 27 is pulled in by the hydraulic pressure of the other pipe line, the opening 35b is opened and the processing liquid flows out, and the liquid level 8 of the separation tank 23 is brought to a suitable level.

Further, when the opening / closing device 21 is opened, hydraulic pressure acts on the valve body 30 in the cylinder device 27, and hydraulic pressure acts on the left and right sides of the valve body 30. As a result, the side having the valve rod 31 has a pressure receiving area. Since the operating pressure is low, the valve stem 31 has a packing 28
At the same time, it is pressed against the opening 35b to stop the outflow of the processing liquid.

When the opening 35b is closed, the separation tank 2
The liquid level 8 of 3 rises and reaches the level of the opening 35a. When the content of the substance to be separated in the stock solution is slightly high, the opening 3
5a is opened to keep the liquid level 8 at this level, but the opening / closing of the opening 35a is performed by driving a cylinder type drive device 13 and a packing provided in the drive device 13.

When the content of the substance to be separated in the stock solution is extremely low, the opening 35a is closed by the driving device 13 and the liquid level 8 of the separation tank 23 is set higher than that of the opening of the processing solution outflow pipe 36. Then, the bubbles are removed by raising the temperature to remove the substance to be separated.

In this embodiment, since the liquid level in the separation tank can be controlled in multiple stages, the substances to be separated contained in the stock solution should be removed in response to a wider change in the concentration. You can Even in a system in which the opening 35a and the processing liquid outflow pipe 36 are omitted, a corresponding effect is exhibited.

In the present invention, the opening / closing device may be a method using an electromagnetic coil, a cylinder device, a diaphragm, an air bag or the like.

[0032]

According to the present invention, when the bubbles generated by adhering the substance to be separated in the stock solution to the bubbles generated by the bubble generating device are accumulated on the liquid surface of the separation tank, By operating the liquid level adjusting means by the control signal to raise the liquid level in the separation tank and facilitating the removal of the bubbles to which the substances to be separated adhere by the bubble removing device, regardless of the change in the concentration of the substances to be separated, (EN) A bubble separation device having high concentration efficiency of an object to be separated and capable of producing a treatment liquid from which the object to be separated is appropriately removed.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a third embodiment of the present invention.

FIG. 5 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Separation tank 2 Bubble generator 3,22 Bubble removal device 4 Raw liquid inflow part 5 Processing liquid outflow part 5a Side wall 6 Movable weir 7 Bubbles 8 Liquid level 9 Foam 12 Processing liquid outflow port 13 Driving device 14,21 Opening device 15 Driving source 16 Control device 17 Guide 18 Motor 19 Rotating weir 20 Transmission device 23 Separation tank with lid 24 Cylindrical movable weir 25 Processing liquid outflow pipe 26 Processing liquid concentration monitor device 27 Cylinder device 28 Packing 29 Pipe line 30 Valve body 31 Valve rod 33, 34 Escape port 35, 36 Treatment liquid outflow pipe

Claims (1)

[Claims] 1. A separation tank provided with a bubble generator, a bubble remover, and a stock solution inflow section, a processing solution outflow section communicating with the separation tank, and a processing solution flow provided adjacent to the outflow section. An air bubble separation device having an outlet, comprising a liquid level adjusting means provided in the treatment liquid outflow portion, and a control device connected to the liquid level adjusting means.