JP2019107584A - Mixer - Google Patents

Abstract

To provide a mixer which can sufficiently mix a liquid with a fluid while saving energy.SOLUTION: A mixer 1A is used to mix a fluid with a liquid and includes a processing tank 2A having a storage chamber 10. An injection port 15a of an injection passage 15 and an exhaust port 16a of an exhaust passage 16 open on an inner surface of the storage chamber 10. A partition plate 90 divides an interior of the storage chamber 10 into divided spaces 10a, 10b and the injection port 15a and the exhaust port 16 communicate with the divided spaces 10a, 10b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a mixing device for mixing a fluid with a liquid.

In recent years, in fields such as chemical industry and biological industry, bubbles having a diameter of 100 μm or less called fine bubbles may be generated in a liquid. The finely divided air bubbles remain in the water for a long time without rising to the water surface and bursting. Then, various functions can be added to the liquid by efficiently mixing, diffusing, and dissolving the bubbles in the liquid.
Conventionally, for example, when performing biological treatment with activated sludge in sewage treatment, oxygen is mixed with water to be treated (sewage) in an aeration tank in order to supply oxygen to activated sludge (microorganisms) that decomposes organic matter. ing.

  And in various water treatments, there are some which have provided the mixing device for mixing gas to-be-processed water in a tank. As such a mixing apparatus, there is an apparatus in which an injection passage is opened to the inner surface of the storage chamber, and a discharge passage is opened to the other inner surface facing the inner surface (see, for example, Patent Document 1).

In such a mixing apparatus, the water to be treated and the gas are injected from the injection passage into the storage chamber, and after the water to be treated and the gas are mixed in the storage chamber, the treated water (mixture) in the storage chamber is discharged from the discharge passage. For example, it is discharged into the aeration tank.
When the water and gas to be treated are injected from the injection passage into the storage chamber, the cavitation effect causes the gas to be finely bubbled. Thus, the amount of gas dissipated from the water to be treated to the atmosphere can be reduced by microbubbling the gas in the water to be treated.

JP 2000-000563 A

  In the above-described conventional mixing apparatus, when the water and gas to be treated are injected from the injection passage into the storage chamber, the water and gas to be treated swirl in the storage chamber. At this time, it is preferable to increase the oxygen concentration of the treated water by sufficiently swirling the treated water and the gas in the storage chamber to bring the treated water and the gas into contact with each other.

In order to mix the fluid such as oxygen well with the liquid such as the water to be treated, it is preferable that the fluid and the fluid be greatly swirled in the storage chamber to greatly disturb the behavior of the fluid and the fluid.
However, in the conventional mixing apparatus, it is necessary to use a pump with a large discharge amount in order to cause the liquid and fluid in the storage chamber to swirl greatly, which causes a problem of increased energy consumption.

  An object of the present invention is to provide a mixing device capable of mixing a liquid and a fluid well while solving the above-mentioned problems and saving energy.

  In order to solve the above-mentioned subject, the present invention is a mixing device for mixing a fluid with a fluid, and is provided with a processing tank which has a storage chamber in which a mixture of the fluid and the fluid is stored. On the inner surface of the storage chamber, an inlet of an injection passage for injecting the liquid and the fluid into the storage chamber, and an outlet of a discharge passage for discharging the mixture from the storage chamber are opened. doing. The storage chamber is divided into two divided spaces by a partition plate, and the inlet and the outlet communicate with both divided spaces.

  In the mixing apparatus of the present invention, liquid and fluid (gas or liquid) are injected from the inlet into both divided spaces in the storage chamber, and the liquid and fluid swirl in the divided space. Further, in the mixing apparatus of the present invention, the storage chamber is divided into two divided spaces by the partition plates, both divided spaces are made close to a flat shape, and the volume of the divided space is adjusted to stabilize the vortex flow. Can. Thus, in the mixing device of the present invention, the behavior of the liquid and the fluid can be greatly disturbed even if the flow rates of the liquid and the fluid to be injected are reduced, so that the liquid and the fluid can be well mixed.

In the mixing apparatus described above, the inlet may be opened in the first inner surface of the storage chamber, and the outlet may be opened in the inner surface of the storage chamber in a surface other than the second inner surface facing the first surface. Is preferred.
In this configuration, the liquid and fluid flowing into the storage chamber from the inlet on the first inner surface abut the second inner surface, and the flow changes greatly. Then, the liquid and the fluid are largely swirled in the storage chamber, and then discharged from the discharge port disposed on the surface other than the second inner surface.

  Thus, in the mixing device of the present invention, the inlet and the outlet are open on two opposite sides. In other words, since the outlet is open on the inner surface other than the second inner surface facing the first inner surface where the inlet is open, the liquid and fluid injected into the storage chamber do not get caught in the vortex, and from the discharge passage The problem of being easily discharged can be reduced. As a result, the liquid and fluid flow in a long path in the reservoir chamber while being involved in the vortex flow, and the behavior of the liquid and fluid can be greatly disturbed, so that the liquid and the fluid can be well mixed.

  In the mixing device described above, it is preferable that the entire storage chamber be divided into the two divided spaces by the partition plate, and the liquid and the fluid be well mixed by stabilizing the vortex flow in the entire storage chamber.

  In the mixing apparatus described above, when the first inner surface is the inner surface of the side portion of the storage chamber, the inlet and the outlet are disposed at the lower portion of the first inner surface, and the inlet is the outlet. It is preferable to arrange it above. Furthermore, it is preferable to divide at least the lower part of the storage chamber into the two divided spaces by the partition plate.

  In this configuration, the liquid and fluid discharged from the inlet to the lower part of the reservoir form a stable vortex in the divided space. Further, an upper vortex and a lower vortex are formed in the storage chamber, and the buoyancy of the fluid makes the momentum of the upper vortex stronger. Thus, in the configuration described above, the liquid and the fluid can be well mixed.

  In the mixing apparatus of the present invention, since the liquid and the fluid can be well mixed while saving energy, the liquid and the fluid can be processed efficiently.

It is a perspective view showing a mixing device concerning an embodiment of the present invention. It is the schematic block diagram which showed the inside of the mixing apparatus which concerns on embodiment of this invention. It is a side view showing a mixing device concerning an embodiment of the present invention. It is the figure which showed the modification of the mixing apparatus concerning embodiment of this invention, and is a perspective view of the structure which provided the partition plate in the lower part of the storage chamber. It is the figure which showed the modification of the mixing apparatus which concerns on embodiment of this invention, and is the schematic block diagram which showed the inside of the structure which arrange | positioned the inlet and the outlet up and down.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate. Although the description of the configuration requirements described below is made based on representative embodiments and specific examples, the present invention is not limited to such embodiments.
In this representative embodiment, a mixing device used for sewage treatment to purify treated water (sewage) such as domestic wastewater will be described.
The mixing apparatus of the present embodiment is the biological treatment with activated sludge, in order to supply oxygen to the activated sludge (microorganisms) that decomposes the organic matter, oxygen to the water to be treated (“liquid” in the claims) The “fluid” in the range of

As shown in FIG. 1, the mixing apparatus 1A of the present embodiment includes a processing tank 2A having a storage chamber 10, and an injection passage 15 and a discharge passage 16 provided in the processing tank 2A.
In the mixing apparatus 1A, treated water and oxygen are injected from the injection passage 15 into the storage chamber 10, oxygen is mixed with the treated water in the storage chamber 10, and then treated water and oxygen are mixed (claim The “mixture” in the range is discharged from the inside of the storage chamber 10 through the discharge passage 16 to an external tank (not shown) such as an aeration tank or a control tank (drainage tank).

  The processing tank 2A is a hollow rectangular solid, and the storage chamber 10 is formed inside. The processing tank 2A includes a pair of upper and lower top plates 20 and bottom plates 30, a pair of left and right side walls 40 and right side walls 50, and a pair of front and rear walls 60 and 70.

The top plate 20 and the bottom plate 30 are rectangular flat plates arranged horizontally. The top plate 20 is disposed directly above the bottom plate 30. The top plate 20 and the bottom plate 30 have the same shape, and are formed to be longer in the left-right direction than in the front-rear direction.
The top plate 20 constitutes the top of the storage chamber 10, and the bottom plate 30 constitutes the bottom of the storage chamber 10. That is, the inner surface 21 of the top plate 20 is the inner surface of the top of the reservoir 10, and the inner surface 31 of the bottom plate 30 is the inner surface of the bottom of the reservoir 10. The inner surface 21 of the top plate 20 and the inner surface 31 of the bottom plate 30 face each other in the vertical direction.

  The left side wall 40 and the right side wall 50 are respectively raised at the left and right edges of the bottom plate 30. The left side wall 40 and the right side wall 50 extend vertically upward with respect to the bottom plate 30. The left side wall 40 and the right side wall 50 have the same shape, and are formed longer in the vertical direction than in the front-rear direction.

  A front wall 60 and a rear wall 70 are raised at the front and rear edges of the bottom plate 30, respectively. The front wall 60 and the rear wall 70 extend vertically upward with respect to the bottom plate 30. The front wall 60 and the rear wall 70 have the same shape, and are formed longer in the vertical direction than in the horizontal direction.

  The left side wall 40, the right side wall 50, the front wall 60, and the rear wall 70 form a rectangular cylindrical trunk 80. The lower surface of the body 80 is closed by the bottom plate 30, and the upper surface of the body 80 is closed by the top plate 20.

The storage chamber 10 is a rectangular parallelepiped space whose outer periphery is surrounded by the body 80 and whose upper and lower surfaces are closed by the top plate 20 and the bottom plate 30.
A pair of upper and lower inner surfaces 21 and 31, a pair of left and right inner surfaces 41 and 51, and a pair of front and rear inner surfaces 61 and 71 are formed on the inner surface of the storage chamber 10.

The inner surface 41 of the left side wall 40 ("first inner surface" in the claims) and the inner surface 51 of the right side wall 50 ("second inner surface" in the claims) are the inner surfaces of the side portions of the storage chamber 10. And raised against the inner surface 31 of the bottom plate 30. The inner surface 41 of the left side wall 40 and the inner surface 51 of the right side wall 50 face each other in the left-right direction.
The inner surface 61 of the front wall 60 and the inner surface 71 of the rear wall 70 are the inner surfaces of the side portions of the storage chamber 10 and are raised relative to the inner surface 31 of the bottom plate 30. The inner surface 61 of the front wall 60 and the inner surface 71 of the rear wall 70 face each other in the front-rear direction.

A pair of inner surfaces 41, 51 facing each other in the left and right direction and a pair of inner surfaces 61, 71 facing each other in the front and rear direction are arranged in a square tube shape.
In the mixing apparatus 1A of this embodiment, the distance between the inner surface 41 of the left side wall 40 and the inner surface 51 of the right side wall 50 is longer than the distance between the inner surface 61 of the front wall 60 and the inner surface 71 of the rear wall 70. It is formed.
As described above, in the storage chamber 10 of the present embodiment, the width in the left-right direction is formed larger than the width (depth) in the front-rear direction. Thus, the space in the storage chamber 10 is formed into a flat rectangular parallelepiped which is wide in the left-right direction and narrow in the front-rear direction.

  In the treatment tank 2A of the present embodiment, as shown in FIG. 2, an injection passage 15 for injecting treated water and oxygen into the storage chamber 10, and a mixture of treated water and oxygen in the storage chamber 10. And a discharge path 16 for discharging from the tank.

  The injection passage 15 includes an injection port 15a opened to the inner surface 41 of the left side wall 40, an injection hole 15b communicating with the injection port 15a, and an injection pipe 15c provided on the outer surface of the left side wall 40.

The inlet 15 a is open to the inner surface 41 of the left side wall 40. The inlet 15a is a circular opening (see FIG. 1). The inlet 15 a is disposed below the inner surface 41 of the left side wall 40. Moreover, the inlet 15a is arrange | positioned at the center part of the front-back direction of the inner surface 41 of the left side wall 40 (refer FIG. 1).
The injection hole 15b is a circular hole communicating with the injection port 15a, and penetrates the left side wall 40 in the left-right direction.

  The tip of the injection pipe 15c is attached to the outer surface of the left side wall 40, and the injection pipe 15c communicates with the injection hole 15b. The proximal end of the injection pipe 15c is connected to a supply device (not shown), and the treatment water and high concentration oxygen are supplied together from the supply device to the injection pipe 15c. Then, the treated water and oxygen are injected into the storage chamber 10 from the injection port 15a through the injection pipe 15c and the injection hole 15b.

  The discharge passage 16 is constituted by a discharge port 16a opened to the inner surface 41 of the left side wall 40, a discharge hole 16b communicating with the discharge port 16a, and a discharge pipe 16c provided on the outer surface of the left side wall 40.

The discharge port 16 a is open to the inner surface 41 of the left side wall 40. The discharge port 16a is a circular opening (see FIG. 1). The discharge port 16 a is disposed below the inner surface 41 of the left side wall 40. Moreover, the discharge port 16a is arrange | positioned at the center part of the front-back direction of the inner surface 41 of the left side wall 40 (refer FIG. 1).
The discharge hole 16b is a circular hole communicating with the discharge port 16a, and passes through the left side wall 40 in the left-right direction.

  The tip of the discharge pipe 16c is attached to the outer surface of the left side wall 40, and the discharge pipe 16c communicates with the discharge hole 16b. The proximal end portion of the discharge pipe 16c is connected to piping to the next process (for example, an outer tank such as an aeration tank or a control tank). Then, the mixture in the storage chamber 10 is sent to the next step from the discharge port 16a through the discharge hole 16b and the discharge pipe 16c.

  The inlet 15 a and the outlet 16 a of the present embodiment are disposed below the central portion (boundary line L <b> 1) in the vertical direction of the inner surface 41 of the left side wall 40. Further, the inlet 15a and the outlet 16a are disposed across the vertically central portion (boundary line L2) of the lower half of the inner surface 41 of the left side wall 40. The inlet 15a is disposed above the outlet 16a.

In the mixing apparatus 1A of the present embodiment, as shown in FIG. 1, the partition plate 90 is disposed in the storage chamber 10.
The partition plate 90 is a rectangular flat plate having the same size as the inner surface 61 of the front wall 60 and the inner surface 71 of the rear wall 70. Both surfaces of the partition plate 90 are parallel to the inner surface 61 of the front wall 60 and the inner surface 71 of the rear wall 70, as shown in FIG.
The front surface of the partition plate 90 faces the inner surface 61 of the front wall 60 at a distance, and the rear surface of the partition plate 90 faces the inner surface 71 of the rear wall 70 at a distance.

The outer peripheral edge portion of the partition plate 90 is in contact with the upper, lower, left, and right inner surfaces 21, 31, 41, 51 of the storage chamber 10, as shown in FIG. Thus, the entire storage chamber 10 is divided by the partition plate 90 into two divided spaces 10a and 10a in the front and rear.
The partition plate 90 is arrange | positioned at the intermediate part of the front-back direction of the storage chamber 10, as shown in FIG. Therefore, the two divided spaces 10a, 10a are rectangular parallelepiped spaces of the same size. That is, the storage chamber 10 is bisected by the partition plate 90.

The divided space 10a of the present embodiment is formed to have a wider width in the vertical direction and the lateral direction than the width in the front-rear direction. Thus, by forming the divided space 10a into a flat shape, it is possible to stably form an eddy current in the divided space 10a.
Further, the size of the divided space 10a is not limited, but division is performed in consideration of the residence time of the water to be treated and oxygen so that the water to be treated and oxygen sufficiently contact in the divided space 10a. The volume of the space 10a is set.

The inlet 15 a and the outlet 16 a are bisected into the front and rear areas by the edge of the partition plate 90.
The front half of the inlet 15a and the outlet 16a is exposed on the front side of the partition plate 90 and is in communication with the front divided space 10a.
The rear half of the inlet 15a and the outlet 16a is exposed to the rear side of the partition plate 90 and is in communication with the rear divided space 10a.

Next, a process of mixing the water to be treated and oxygen using the mixing apparatus 1A of the present embodiment will be described.
First, as shown in FIG. 2, water to be treated and high concentration of oxygen are supplied from a supply device (not shown) to the injection pipe 15c, and the water to be treated and oxygen are injected into the storage chamber 10 from the injection port 15a. Do.

When water to be treated and oxygen are injected into the storage chamber 10 from the inlet 15a, the water to be treated and oxygen are diverted toward the front and rear divided spaces 10a and 10a by the partition plate 90 as shown in FIG. Treated water and oxygen are uniformly injected into the front and rear divided spaces 10a, 10a.
As shown in FIG. 2, the water to be treated and the oxygen abut on the inner surface 51 of the right side wall 50 in the divided space 10 a and the flow changes greatly. Then, after the treated water and oxygen swirl in the longitudinal direction in the storage chamber 10, a mixture of the treated water and oxygen is discharged from the discharge port 16a of the inner surface 41 of the left side wall 40.

At this time, the upper vortex flow S1 and the lower vortex flow S2 are formed in the divided space 10a by the treated water and oxygen.
Then, the water to be treated and oxygen in the storage chamber 10 flow from the upper vortex flow S1 to the lower vortex flow S2, and are discharged from the discharge port 16a to the discharge hole 16b. Then, the treated water is sent to the next step through the discharge passage 16.

In the mixing apparatus 1A of the present embodiment, the behavior of the water to be treated and oxygen in the storage chamber 10 is largely disturbed, so the water to be treated and oxygen can be mixed well. In addition, the divided space 10a has a flat shape and a volume that is adjusted so that the vortex flow is stabilized.
Thereby, in the mixing apparatus 1A of the present embodiment, the behavior of the water and oxygen to be treated can be greatly disturbed even if the flow rates of the water and oxygen to be injected are suppressed, so the water to be treated and oxygen are mixed well be able to.
In the mixing apparatus 1A of the present embodiment, since the oxygen concentration of the treated water is high, the ability to decompose organic matter by activated sludge can be enhanced.

  In the mixing apparatus 1A of the present embodiment as described above, even if the flow rates of the water to be treated and oxygen injected into the storage chamber 10 are suppressed, the behavior of the water to be treated and oxygen in the storage chamber 10 is greatly disturbed. Therefore, in the mixing apparatus 1A of the present embodiment, the water to be treated and oxygen can be mixed well, and the waste water treatment can be saved.

As mentioned above, although embodiment of this invention was described, this invention can be suitably changed in the range which does not deviate from the meaning, without being limited to the said embodiment.
In the present embodiment, as shown in FIG. 1, the mixing apparatus 1A used for waste water treatment has been described, but the types of liquids and fluids that can be mixed using the mixing apparatus of the present invention are not limited. For example, the liquid may be mixed with another liquid.

  In the mixing apparatus 1A of the present embodiment, the shape and size of the storage chamber 10 are not limited, and are appropriately set according to the required processing capacity. Moreover, the cross-sectional shape and the magnitude | size of the injection path 15 and the discharge path 16 are not limited, either, For example, axial cross section may be formed in quadrilateral or an ellipse.

In the mixing apparatus 1A of the present embodiment, the entire storage chamber 10 is divided into two divided spaces 10a and 10a by the partition plate 90, but only part of the storage chamber 10 is divided by the partition plates into two divided spaces 10a and 10a. It may be divided into
For example, as in the mixing apparatus 1B shown in FIG. 4, the partition plate 91 may be disposed only at the lower part than the middle position in the height direction of the storage chamber 10. In this configuration, only the lower part of the storage chamber 10 is divided into two divided spaces 10a and 10a, and the upper part of the storage room 10 is one space communicating with both divided spaces 10a and 10a.

  In the mixing apparatus 1A of this embodiment, as shown in FIG. 1, the inlet 15a and the outlet 16a are disposed on the inner surface 41 of the left side wall 40, but the positions of the inlet 15a and the outlet 16a are limited. It is not a thing. For example, the inlet 15a and the outlet 16a may be disposed on the inner surface 51 of the right side wall 50, the inner surface 61 of the front wall 60, or the inner surface 71 of the rear wall 70. In addition, the inlet 15 a and the outlet 16 a may be disposed on the inner surface 21 of the top plate 20.

Further, in the mixing apparatus 1A of the present embodiment, the inlet 15a and the outlet 16a are disposed on the same inner surface 41, but the inlet 15a and the outlet 16a may be disposed on different inner surfaces.
For example, as in the mixing apparatus 1C shown in FIG. 5, the inlet 15a is disposed on the inner surface 21 of the top plate 20, the outlet 16a is disposed on the inner surface 71 of the bottom plate 30, and the entire storage chamber 10 is divided by the partition plate 90. It may be divided into two divided spaces 10a and 10a.

  According to the mixing apparatus of the present invention, for example, the mixing apparatus can be installed in a building pit, a manhole, a drainage facility (waste water) such as a factory, and the like provided in the basement of a building. In the field of utilizing microbubbles, for example, promotion of growth of marine products and agricultural and livestock products and preservation of freshness, modification of food flavor and texture, cleaning and peeling of precision machinery and electronic parts, medicine, medicine, cosmetics, etc. It can be suitably used in various applications of

DESCRIPTION OF SYMBOLS 1A mixing apparatus 1B mixing apparatus 1C mixing apparatus 2A processing tank 10 reservoir 10a division space 15 injection path 15a injection port 15b injection hole 15c injection pipe 16 discharge path 16a discharge port 16b discharge hole 16c discharge pipe 20 top plate 21 inner surface of bottom plate 30 bottom plate 31 inner surface of bottom plate 40 left side wall 41 inner surface of left side wall 50 right side wall 51 inner surface of right side wall 60 front wall 61 inner surface of front wall 70 rear wall 71 inner surface of rear wall 80 trunk portion 90 partition plate 91 partition plate

Claims (4)

A mixing device for mixing a fluid with a liquid, the mixing device comprising:
A processing tank having a storage chamber in which a mixture of the liquid and the fluid is stored;
The inner surface of the reservoir is
An inlet of an injection channel for injecting the liquid and the fluid into the storage chamber;
An outlet of an outlet for discharging the mixture out of the storage chamber;
The storage chamber is divided into two divided spaces by a partition plate,
The mixing apparatus characterized in that the inlet and the outlet communicate with the two divided spaces. A mixing device according to claim 1, wherein
The inlet is open to the first inner surface of the storage chamber,
The mixing apparatus according to claim 1, wherein the discharge port is open on a surface other than the second inner surface facing the first inner surface in the inner surface of the storage chamber. The mixing apparatus according to claim 1 or 2, wherein
A mixing apparatus characterized in that the entire storage chamber is divided into the two divided spaces by the partition plate. A mixing apparatus according to claim 2, wherein
The first inner surface is an inner surface of a side of the storage chamber,
The inlet and the outlet are disposed below the first inner surface,
The inlet is disposed above the outlet,
A mixing apparatus characterized in that at least a lower portion of the storage chamber is divided into the two divided spaces by the partition plate.

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