JP2012200717A - Air diffuser and handling method for the air diffuser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air diffuser such that an air diffusion part can be easily put in and out of a tank in spite of a relatively simple structure.SOLUTION: The air diffuser is used to diffuse gas into a liquid stored in the tank, and so configured as to put the air diffusion part, provided to diffuse the gas into the liquid, in and out of the tank through an opening at the top of the tank. The air diffuser includes a first supply pipe which sends the supplied gas downward during use in the tank, a second supply pipe which sends the gas sent downward by the first supply pipe in a horizontal direction, and the air diffusion part which diffuses the gas sent by the second supply pipe in the horizontal direction, into the liquid, the angle between the first supply pipe and second supply pipe being maintained.

Description

  The present invention relates to an air diffuser used to diffuse gas into a liquid contained in a tank, and a method of handling the air diffuser. Specifically, for example, in order to diffuse air to the organic wastewater in the wastewater treatment tank for purifying the organic wastewater, and to diffuse the air through the opening at the top of the wastewater treatment tank. The present invention relates to an air diffuser capable of taking in and out the air diffuser provided in the tank and a method for handling the air diffuser.

  This type of air diffuser can be used to replace the air diffuser outside the tank without draining the liquid in the tank, for example, to replace faulty parts that may occur with use, or for periodic inspections, etc. It is configured so that it can be taken out.

  Conventionally, various devices are known as this type of air diffuser. Specifically, for example, in a state of use in a tank, a first supply pipe that sends a gas to be supplied downward, and a gas that is sent downward by the first supply pipe in a horizontal direction. 2 supply pipes and an air diffuser for diffusing the gas sent in the horizontal direction in the second supply pipe into the liquid, and further extending vertically in the tank and provided in the air diffuser There is known one provided with a guide part that engages with the guided part (Patent Document 1).

Specifically, such an air diffuser includes a guide portion that extends obliquely in the vertical direction in the tank, and a guided portion provided in the air diffuser, in order to supply the air diffuser into the tank, The guided portion is configured to move along the guide portion while engaging the guide portion. The angle between the first supply pipe and the second supply pipe is appropriately changed according to the movement of the guided portion.
For example, when the air diffuser is taken out from the tank, the first supply pipe is pulled up to change the angle of the second supply pipe with respect to the first supply pipe from 90 ° to 0 ° and from the horizontal direction to the vertical direction. Change the direction. Further, such an air diffuser can be easily moved upward while the guided portion and the guide portion of the air diffuser on the lower side of the second supply pipe whose direction has changed are engaged. In addition, such an air diffuser is operated in the same manner in the reverse order when the air diffuser is placed in the tank.
Thus, such an air diffuser can be easily taken in and out of the tank while moving the air diffuser along the guide by changing the angle between the first supply pipe and the second supply pipe. Is possible.

  However, such a diffuser has a problem that it has a complicated structure because it requires a guide part and a guided part in order to easily take in and out the diffuser part into and out of the tank. Further, since a means for freely changing the angle between the supply pipes while joining the first supply pipe and the second supply pipe is required, there is a problem that the structure is relatively complicated and a failure is likely to occur. .

JP 2010-188300 A

  In view of the above-described problems and the like, an object of the present invention is to provide an air diffusing device that can easily take in and out the air diffusing portion while being a relatively simple structure. It is another object of the present invention to provide a method for handling an air diffuser that can easily take in and out the air diffuser.

  In order to solve the above problems, an air diffuser according to the present invention is used to diffuse a gas into a liquid contained in a tank, and a diffuser provided to diffuse the gas into the liquid. A diffuser device in which a gas part can be taken in and out of the tank through an opening in the upper part of the tank, and when used in the tank, a first supply pipe that sends the gas to be supplied downward A second supply pipe that sends the gas sent downward in the first supply pipe in the horizontal direction, and the diffuser that diffuses the gas sent in the horizontal direction in the second supply pipe into the liquid It is comprised so that an air | gas part may be provided, It is comprised so that the angle between a said 1st supply pipe | tube and a said 2nd supply pipe | tube may be maintained.

  According to the air diffuser configured as described above, since the angle between the first supply pipe and the second supply pipe is maintained, the vertical movement of the first supply pipe can be prevented. Following this, the second supply pipe can move up and down. Therefore, when taking out the diffuser from the tank, the second supply pipe can be moved as intended by operating the first supply pipe. Then, the second supply pipe arranged along the horizontal direction is gradually raised to the vertical method by gradually lowering the first supply pipe arranged along the vertical direction in the horizontal direction while raising the first supply pipe. Can do. Finally, the second supply pipe erected in the vertical direction can be extracted from the opening of the tank, and the aeration unit can be extracted. Further, by performing the same operation while reversing the order, the diffuser can be put into the tank. In this way, the air diffuser can easily take in and out the air diffuser even if there is no means for taking in and out.

In the air diffuser according to the present invention, the first supply pipe and the second supply pipe are provided at a front end portion on the air supply side of the first supply pipe and a front end portion on the gas supply side of the second supply pipe. It is preferable that it is joined.
With such a configuration, when the diffuser is taken in and out of the tank, the joining portion between the first supply pipe and the second supply pipe can easily pass through the opening of the tank. Therefore, even if the area of the opening in the upper part of the tank is relatively small, it becomes easier to put the diffuser part in and out of the tank.

Furthermore, the air diffuser according to the present invention includes a base in which the air diffuser is disposed at a front end of the second supply pipe on the air diffuser side and is in contact with the bottom surface of the tank. It is preferable that the tip side of the base is formed so as to warp toward the tip when used in the tank.
With such a configuration, there is an advantage that the air diffuser can be easily taken in and out of the tank. Specifically, when the diffuser is taken out of the tank, the orientation of the base disposed in the horizontal direction can be gradually changed in the vertical direction so that the gas supply side is on the upper side. That is, the foundations arranged in the horizontal direction can move in the horizontal direction on the bottom surface of the tank while standing in the vertical direction. At this time, even if the bottom surface of the base slides on the bottom surface of the tank, the top end side of the base is formed to warp as described above, thereby suppressing the top end of the base from being caught on the bottom surface of the tank. Can do. That is, the lower side surface of the warped portion can smoothly move on the bottom surface of the tank. Therefore, it becomes easier to take the diffuser out of the tank. For the same reason, it becomes easier to put the diffuser into the tank.

  In the method of handling an air diffuser according to the present invention, the first supply pipe and the second supply pipe of the air diffuser arranged to be usable in the tank are moved in the horizontal direction with respect to the air diffuser. While carrying out the tank outside extraction step of taking the diffuser out of the tank through the opening of the tank by changing the direction of the second supply pipe in the vertical direction and moving the second supply pipe upward, The air diffuser provided in the air diffuser is brought out of the tank.

  In the method of handling an air diffuser according to the present invention, the air diffuser is inserted into the tank through the opening of the tank from the outside of the tank, and the first supply pipe and the second supply pipe are provided to the air diffuser. By carrying out an in-tank introduction step in which the diffuser can be used by changing the direction of the second supply pipe from the vertical direction to the horizontal direction while moving downward, the diffuser provided in the diffuser The air part is put into the tank.

  As described above, the air diffusing device of the present invention has an effect that it can be easily put in and out of the tank while having a relatively simple structure.

The schematic diagram which looked at a mode that an air diffuser is used, and a mode that a diffused part is taken in and out from the inside and outside of a tank from the side surface side of the tank. The side view of a diffuser. The figure showing the cross-sectional shape of the base cut | disconnected in the direction perpendicular | vertical to the extending direction of a 2nd supply pipe | tube. The schematic diagram which looked at a mode that an air diffuser is used from the upper side of the tank.

  Hereinafter, embodiments of the aeration apparatus of the present invention will be described with reference to the drawings, taking as an example an aeration apparatus used in a wastewater treatment tank that purifies organic wastewater using aerobic microorganisms.

  Drawing 1 is a mimetic diagram when what looked at from the side which made the diffuser device 10 of this embodiment put into a tank and used it. FIG. 2 is a side view of the air diffuser, and FIG. 3 is a cut surface obtained by cutting the gas supply side of the base of the air diffuser perpendicularly to the extending direction of the second supply pipe. FIG. 4 is a schematic diagram when the diffuser 10 of the present embodiment is put in a tank and used, as viewed from above.

  As shown in FIG. 1, the air diffuser 10 according to the present embodiment is used to diffuse a gas 14 into a liquid 13 accommodated in a tank 11, and diffuses the gas 14 into the liquid 13. The air diffuser 3 provided for the purpose is an air diffuser 10 that can be taken in and out of the tank 11 through an opening 12 in the upper part of the tank 11. The first supply pipe 1 that sends the gas to be moved downward, the second supply pipe 2 that sends the gas sent downward in the first supply pipe in the horizontal direction, and the horizontal direction in the second supply pipe And an air diffuser 3 for diffusing the gas sent to the liquid 13 so that the angle between the first supply pipe 1 and the second supply pipe 2 is maintained. It is configured.

  In the air diffuser 10, the angle between the first supply pipe 1 and the second supply pipe 2 is maintained by integrating the first supply pipe 1 and the second supply pipe 2. Yes.

As shown in FIG. 1, the air diffuser 10 supports the first supply pipe 1 and the second supply pipe 2 to each other and sets an angle between the first supply pipe 1 and the second supply pipe 2. It is preferable to provide an angle maintaining member 4 for maintaining more reliably.
Further, although the angle between the first supply pipe 1 and the second supply pipe 2 is not particularly limited, the angle of the diffuser 10 is usually a right angle as shown in FIG. It is comprised so that.

The air diffuser 10 may include a protective member (not shown) that protects the first supply pipe 1 and the second supply pipe 2 over the entire outer sides of the first supply pipe 1 and the second supply pipe 2. Good.
Note that a plurality of the air diffusers 10 may be used simultaneously in the tank 11.

Examples of the tank 11 include a wastewater treatment tank for treating a liquid such as organic wastewater using aerobic microorganisms as in the present embodiment. Moreover, the tank which does not perform the waste water treatment by microorganisms is also mentioned. Specifically, for example, a tank for aeration and stirring to prevent sedimentation of sludge and suspension in wastewater containing sludge and suspension, a tank used to mix and homogenize liquid, and anti-corruption For example, a tank for aeration is used.
Specific examples of the liquid 13 include organic factory wastewater discharged from a factory and containing organic matter, and organic wastewater such as sewage containing human waste. Moreover, it is not limited to such organic waste water, The general waste water which can be aerated and stirred is mentioned.
As the gas 14, air is usually adopted. By diffusing air into the liquid 13, water purification can be performed more reliably in wastewater treatment that purifies organic wastewater using aerobic microorganisms.

  The tank 11 has an opening 12 at the top. In the wastewater treatment tank for purifying the organic wastewater, the opening 12 has a range in which the diffuser 3 can be taken in and out for the purpose of suppressing the odor of the organic wastewater from diffusing outside the tank. The opening area is made as small as possible.

  The first supply pipe 1 is formed in a hollow tubular shape, and is configured to send gas supplied from outside the tank 11 to the second supply pipe 2.

The first supply pipe 1 is formed so that the length is longer than the length from the bottom surface in the tank 11 to the opening 12. Therefore, the upper end of the first supply pipe 1 is above the opening 12 in a state where the air diffuser 10 is placed on the bottom surface in the tank 11.
The position of the first supply pipe 1 in the tank 11 is suppressed from being changed by holding a portion above the opening 12 of the tank 11 by a holding means (not shown). Therefore, the diffuser 10 can be used stably.

  The material of the first supply pipe 1 is not particularly limited, and examples of the material include metals such as stainless steel and plastics such as polyethylene. The material of the first supply pipe 1 is preferably a metal in that it is excellent in strength and that the diffuser 10 can be prevented from being separated from the bottom surface of the tank by the buoyancy of the liquid by weight. As the metal, stainless steel such as SUS304 and SUS316 is preferable in terms of excellent corrosion resistance.

  The second supply pipe 2 is formed in a hollow tubular shape. The second supply pipe 2 is configured to send the gas supplied from the first supply pipe 1 to the air diffuser 3. That is, the first supply pipe 1 and the second supply pipe 2 are configured such that their hollow portions communicate with each other.

  Examples of the material of the second supply pipe 2 include the same materials as those of the first supply pipe 1.

As shown in FIG. 1, the air diffuser 10 is preferably configured such that a front end portion on the air supply side of the first supply pipe 1 and a front end portion on the gas supply side of the second supply pipe 2 are joined. With such a configuration, even if the area of the opening 12 in the upper part of the tank 11 is relatively small, there is an advantage that the joint portion between the first supply pipe 1 and the second supply pipe 2 can easily pass through the opening 12.
That is, with this configuration, the joint portion between the first supply pipe 1 and the second supply pipe 2 is substantially L-shaped, so that the joint portion is opened when the diffuser 3 is taken in and out of the tank 11. 12 is easy to pass. Therefore, even if the area of the opening 12 in the upper part of the tank 11 is relatively small, it becomes easy to put the diffuser 3 in and out of the tank 11.
Specifically, the first supply pipe 1 and the second supply pipe 2 of the air diffusing device 10 are, for example, at their respective distal ends via stainless steel joints (elbows) in which hollow cylindrical pipes are bent. By being joined and integrated, the angle between the supply pipes is maintained.

  As shown in FIG. 1, the substantially L-shaped coupling portion where the distal end portion of the first supply pipe 1 and the distal end portion of the second supply pipe 2 are coupled is formed such that the top surface is a convex curved surface. It is preferable that With such a configuration, even when the coupling portion of the first supply pipe 1 and the second supply pipe 2 slides along the side wall surface of the tank when the diffuser 3 is put in and out of the tank, the side wall surface The coupling part can move smoothly along the line. Therefore, the diffuser 3 can be easily put in and out of the tank.

The air diffuser 3 is configured to diffuse the gas 14 supplied from the second supply pipe 2 into the liquid 13 in the tank 11.
The air diffuser 3 is not particularly limited as long as it is connected to the second supply pipe 2 and can be used, and may be configured using various members such as a membrane, a ceramic, or an air diffuser. In the specific example shown in FIG. 2, the air diffuser 3 is provided with a cylindrical body 6 having an air diffuser 9 in the upper part in a state where air diffuses in the tank 11. Further, the air diffuser 3 has an end portion of the second supply pipe 2 attached to the side surface of the cylindrical body 6 so that the gas 14 sent from the second supply pipe 2 is The air is diffused into the liquid 13 in the tank 11 through the air diffuser 9.
Specific examples of the shape of the cylindrical body 6 provided in the diffuser 3 include a cylindrical shape or a hollow polygonal column shape such as a hollow quadrangular column shape.

One air diffuser 10 may be provided in the air diffuser 10 or a plurality of air diffusers 3 may be provided.
When a plurality of the air diffusers 3 are provided in the air diffuser 10, the second supply pipe may be configured to have a branched structure in order to divide the sent gas into a plurality of directions. Then, the sent gas is diffused into the liquid 13 from a plurality of diffuser portions respectively attached to the diffuser side of the branched second supply pipe.

  As shown in FIG. 2, the air diffuser 3 supports the second supply pipe 2 from the lower side in a state in which the second supply pipe 2 is fixed to the base 5 and used in the tank 11. The supporting member 8 can be provided.

As shown in FIG. 2, the air diffuser 3 is disposed at the front end on the air diffuser side of the second supply pipe so as to be in contact with the bottom surface of the tank 11 when used in the tank 11. It is preferable that the base 5 formed is provided.
Since the base 5 is formed so as to be in contact with the bottom surface of the tank 11, the base 5 can be stably in contact with the bottom surface of the tank 11. It is suppressed that it moves without doing. Therefore, the gas 14 can be stably diffused from the diffuser 3.
Specifically, the base 5 can be formed so that the gas supply side has a flat plate shape, for example, as shown in FIG.

As shown in FIG. 2, it is preferable that the tip side of the base 5 is formed to warp toward the tip when used in the tank 11.
Moreover, it is preferable that the said base 5 is formed so that a peripheral end surface may become circular arc shape in the cross section perpendicular | vertical to the circumferential direction. That is, the peripheral end surface of the plate-like base 5 is preferably R-processed as shown in FIG.
With these configurations, as will be described later, the aeration unit 3 can be easily put in and out of the tank 11.

Moreover, the said base 5 is formed so that the contact area with the bottom face of the tank 11 may become smaller in the state which uses the diffuser 10 in a tank in the point that it can move on the bottom face of the tank 11 more smoothly. It is preferable that That is, as shown in FIGS. 3B to 3D, it is preferable to have a structure with an edge so that the contact area becomes small.
Specifically, the base 5 is formed, for example, so that the lower surface on the gas supply side is a concave curved surface and is in contact with the bottom surface of the tank 11 along the extending direction of the second supply pipe. Is preferred. That is, as shown in FIG. 3B, the base 5 is cut in a direction perpendicular to the extending direction of the second supply pipe so that the lower surface on the gas supply side has an arch shape. That is, in other words, it is preferable that the lower surface on the gas supply side is formed in an upwardly convex arc shape. As shown in FIG. 3B, the edge of the base 5 having the arch-shaped lower surface is in contact with the bottom surface of the tank 11 along the extending direction of the second supply pipe. It becomes an edge and contacts the bottom surface of the tank 11 at both ends of the base 5. With such a configuration, the contact area between the base 5 and the bottom surface of the tank 11 in the use state becomes smaller.

Further, for example, as shown in FIGS. 3 (c) and 3 (d), the base 5 has a plate-like portion 5a formed in a plate shape, and projects downward from the plate-like portion 5a to the second supply pipe. It is preferable to provide the protrusion part 5b distribute | arranged along the extending direction. Specifically, the base 5 is a cross section cut in a direction perpendicular to the extending direction of the second supply pipe. For example, as shown in FIG. It is preferable to form so that it may become a shape. Or as shown in FIG.3 (d), it is preferable to form so that the cross section by the side of a gas supply may become a substantially L shape.
In addition, from the viewpoint that the base 5 can be more easily manufactured by bending an angle material, the base 5 has a substantially L-shaped cross section on the gas supply side, as shown in FIG. More preferably. In this case, half of the cylindrical body 6 viewed from the upper side can be arranged on the upper side of the joined portion of the plate-like portion 5a and the protruding portion 5b.
Since the base 5 includes the protrusions 5b, the protrusions 5b serve as edges and come into contact with the bottom surface of the tank 11, so that the contact area in contact with the bottom surface of the tank 11 becomes smaller.

  As described above, the base 5 is formed so that the contact area with the bottom surface of the tank 11 becomes smaller as shown in FIGS. Movement along the extending direction becomes smoother. Thereby, when the aeration part 3 is taken in and out of the tank 11, the base 5 can move more smoothly while contacting the bottom surface of the tank 11 along the extending direction of the second supply pipe.

  The air diffuser 10 can be manufactured by a general method using a conventionally known material.

  Next, an embodiment of a method for handling a diffuser according to the present invention will be described.

In the method of handling an air diffuser according to the present embodiment, the first supply pipe 1 and the second supply pipe 2 of the air diffuser 10 disposed so as to be usable in the tank 11 are horizontally disposed with respect to the air diffuser 10. The tank which moves the second supply pipe 2 to the vertical direction while moving in the direction, and moves the second supply pipe 2 upward to bring the air diffuser 3 out of the tank through the opening 12 of the tank 11. By performing the outside extraction step, the air diffuser 3 provided in the air diffuser 10 is taken out of the tank 11.
Further, the method of handling the air diffuser of the present embodiment is the first method in which the air diffuser 3 is inserted into the tank 11 from the outside of the tank 11 through the opening 12 of the tank 11 with respect to the air diffuser 10. An in-tank introduction step is implemented in which the air diffuser 10 is arranged to be usable by changing the direction of the second supply pipe 2 from the vertical direction to the horizontal direction while moving the supply pipe 1 and the second supply pipe 2 downward. By doing so, the air diffuser 3 provided in the air diffuser 10 is put into the tank 11.

  As shown in FIG. 1, the air diffuser 10 (a) has a tank 11 in which the first supply pipe stands up and the second supply pipe extends in the horizontal direction when used in the tank 11. Is placed inside.

In the outside extraction step, since the angle between the first supply pipe and the second supply pipe in the air diffuser 10 (b) is maintained, as shown in FIG. The second supply pipe can move in the vertical direction following the vertical movement of the supply pipe. Therefore, by operating the first supply pipe to bring the diffuser 3 out of the tank 11 out of the tank, the second supply pipe and the diffuser 3 can be moved up and down as intended. Specifically, the first supply pipe is moved upward in the horizontal direction and gradually lowered in the horizontal direction, thereby gradually moving the second supply pipe extending horizontally in the horizontal direction. Can be raised and further raised.
Finally, the second supply pipe standing in the vertical direction can be extracted from the opening 12 of the tank 11 together with the air diffuser 3 (illustrated by the air diffuser 10 (c)).
That is, in the outside extraction process, the aeration unit 3 can be taken out from the inside of the tank 11 by moving up the aeration apparatus 10 while moving it in the horizontal direction and rotating it by, for example, 90 °.

  On the other hand, in the introduction process in the tank, the diffuser 3 can be put into the tank 11 by performing the same operation with the above order reversed.

  Even if the area of the opening 12 of the tank 11 is relatively small, the diffuser 3 is taken out of the tank 11 or the inside of the tank 11 by performing the outside extraction step or the inside introduction step. Can easily enter.

Further, in the handling method, as described above, the tip side of the base 5 of the air diffuser 3 is formed so as to warp toward the tip in the state of use in the tank 11, The diffuser 3 can be easily taken in and out of the tank 11.
Specifically, when the outside extraction step is performed to take out the diffuser 3 out of the tank 11, the base 5 arranged in the horizontal direction gradually turns in the vertical direction so that the gas supply side is on the upper side. Change. That is, the base 5 arranged in the horizontal direction can move in the horizontal direction on the bottom surface of the tank 11 while standing upright in the vertical direction while the edge on the front end side is in contact with the bottom surface of the tank 11. At this time, even if the lower side of the base 5 slides on the bottom surface of the tank 11, the tip end of the base 5 is caught on the bottom surface of the tank 11 because the tip side of the base 5 is warped as described above. This can be suppressed. That is, since the lower side surface of the warped up portion of the base 5 is a convex curved surface, the air diffuser 3 can smoothly move on the bottom surface of the tank 11. Therefore, the outside extraction process of taking out the diffuser 3 out of the tank 11 can be performed more easily.
In addition, by handling the air diffuser 10 in the same manner in the reverse order, the in-vessel introduction step can be more easily performed so that the air diffuser 3 is put into the tank 11.

  In the handling method, as described above, the peripheral end surface of the base 5 is rounded, so that the edge of the base 5 is moved to the tank 11 when the base 5 moves on the bottom surface of the tank 11. It can suppress that it catches on the bottom face. That is, the base 5 can smoothly move on the bottom surface of the tank 11 by the R processing of the peripheral end surface. Therefore, the outside extraction process and the in-tank introduction process can be more easily performed.

  Specifically, in the handling method, for example, when the diffuser 3 is taken in and out of the tank 11 where sludge can accumulate, the sludge can diffuse into the liquid as the diffuser 3 moves. As described above, by smoothly moving the air diffuser 3 on the bottom surface of the tank 11, the diffusion of sludge can be suppressed. Furthermore, when there are a plurality of air diffusers 10 in the tank 11, each air diffuser 10 can be handled and the air diffuser 3 of each air diffuser 10 can be taken in and out. 10 does not need to be handled, and the diffusion of sludge can be suppressed. As a result, the adverse effect of sludge diffusion on wastewater treatment can be minimized.

  Thus, in the method of handling the air diffuser 10, the air diffuser 3 can be easily taken in and out of the tank 11 without means for taking the air diffuser 3 into and out of the tank. It should be noted that the above-described outside tank extracting step or in-tank introducing step can be performed even if the liquid 13 is present in the tank 11 or the liquid 13 is not present in the tank 11. Since the diffuser 3 can be taken in and out of the tank 11 without extracting the liquid in the tank 11, for example, the outside extraction step and the inside introduction step are performed to repair or replace the diffuser 3. In order to do this, the step of extracting the liquid from the tank 11 is not necessarily required. Therefore, there is an advantage that the process required for the replacement work of the air diffuser 3 can be simplified and the construction period for replacing the air diffuser 3 can be shortened. Moreover, in the tank 11 in which sludge can accumulate, there is an advantage that it is not necessary to dispose of the accumulated sludge during the construction period for exchanging the air diffuser 3. Furthermore, since the step of extracting the liquid from the tank is unnecessary, when wastewater treatment using microorganisms is performed in the tank 11, the microorganisms necessary for the wastewater treatment are kept in the tank 11 and aeration is performed while maintaining the activity of the microorganisms. The part 3 can be replaced, and there is also an advantage that it is very easy to start up the waste water treatment again after the air diffuser 3 is replaced.

  In the said handling method, the arrangement | positioning change process which changes the position of the diffuser 3 of the diffuser 10 arrange | positioned in the usable state can be implemented. That is, once the air diffuser 3 is placed in the tank 11 and can be used, the position of the air diffuser 3 can be easily changed. Specifically, as described above, the second supply pipe can move following the movement of the first supply pipe. Therefore, in the arrangement changing step, after the air diffuser 3 is once installed in the tank 11, The second supply pipe can be moved by operating one supply pipe. Specifically, for example, as shown in FIG. 4, by rotating the second supply pipe while following the movement of the first supply pipe with the first supply pipe as the central axis, the diffuser 3 can be easily formed. The position can be changed (illustrated by arrows).

Although the air diffuser and the handling method of the said embodiment are as the said illustration, this invention is not limited to the air diffuser and the handling method of the said illustration.
Moreover, various aspects used in a general air diffuser and a handling method can be adopted within a range that does not impair the effects of the present invention.

  For example, in the above-described embodiment, the air diffusion device including the angle maintaining member that maintains the angle between the first supply pipe and the second supply pipe has been described, but the present invention is limited to such an embodiment. For example, an air diffuser configured such that the second supply pipe can rotate around the first supply pipe while maintaining the angle between the first supply pipe and the second supply pipe. It may be a device.

  1: 1st supply pipe, 2: 2nd supply pipe, 3: Air diffusion part, 4: Angle maintenance member, 5: Base, 5a: Plate-like part, 5b: Projection part, 10: Air diffuser, 11: Tank 12: Opening, 13: Liquid (drainage), 14: Gas (air)

Claims (5)

Used to diffuse the gas into the liquid contained in the tank, and the diffuser provided to diffuse the gas into the liquid is provided through the opening at the upper part of the tank. An air diffuser that can be taken in and out,
In the state of use in the tank, a first supply pipe that sends the gas to be supplied downward, a second supply pipe that sends the gas sent downward in the first supply pipe in the horizontal direction, It is configured to include the air diffuser that diffuses the gas sent in the horizontal direction in the second supply pipe into the liquid,
An air diffuser configured to maintain an angle between the first supply pipe and the second supply pipe.   2. The diffuser according to claim 1, wherein the first supply pipe and the second supply pipe are joined to each other at a front end portion on the air diffusion side of the first supply pipe and a front end portion on the gas supply side of the second supply pipe. Qi device.   The air diffuser is disposed at the tip of the second supply pipe on the air diffuser side, and includes a base formed so as to be in contact with the bottom surface of the tank. The air diffuser according to claim 2, wherein the air diffuser is configured to warp toward the tip in a state of being used in the above.   The first supply pipe and the second supply pipe of the air diffuser arranged to be usable in the tank with respect to the air diffuser described in any one of claims 1 to 3 in a horizontal direction. Implementing a tank outside extraction step of moving the second supply pipe out of the tank through the opening of the tank by moving the second supply pipe upward while changing the direction of the second supply pipe while moving. A method for handling an air diffuser characterized in that the air diffuser provided in the air diffuser is taken out of the tank.   The air diffuser according to any one of claims 1 to 3, wherein the air diffuser is placed in the tank from the outside of the tank through the opening of the tank, and the first supply pipe and the second supply The diffuser is provided by performing an in-tank introduction step in which the diffuser can be used by changing the direction of the second supply pipe from the vertical direction to the horizontal direction while moving the pipe downward. A method of handling an air diffuser characterized in that the air diffuser is placed in a tank.

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