JP5318825B2 - Air diffuser - Google Patents

Description

  The present invention relates to an air diffuser.

  In recent years, in an air diffuser installed in an aeration tank such as a sewage treatment plant, the air diffuser is provided with an air diffuser film in which fine holes are formed, and the air diffuser is inflated by supplying air from a blower. A so-called membrane type (also referred to as “ultrafine bubble type”) air diffuser that generates fine bubbles is used. By using this membrane type air diffusion means, high air diffusion efficiency can be realized by the generation of fine bubbles.

  On the other hand, when a membrane-type air diffuser is used, it is a mechanism that generates fine bubbles from fine holes, so that compared with conventional air diffuser (for example, diffuser air diffuser) Pressure loss tends to increase. Therefore, for example, in a transition period where a membrane-type air diffuser is introduced instead of a conventional air diffuser, a diffuser air diffuser and a membrane air diffuser coexist in a single unit. When connected to the blower, there is a problem that the amount of air diffused from each air diffuser varies due to the difference in pressure loss, making it difficult to perform suitable water treatment.

  In order to cope with such a problem, for example, as described in Patent Document 1, a membrane-type air diffuser is installed at a position higher than the diffuser-type air diffuser (that is, a position where the water depth becomes shallow). Thus, an air diffuser that adjusts the amount of air diffused from each air diffuser is known.

JP 2004-174354 A

  However, in the air diffuser described in the above-mentioned Patent Document 1, for example, once the pressure balance changes due to factors such as the ratio of the number of installed diffuser-type air diffusers and membrane-type air diffusers changed, The amount of air diffused in the air diffuser changes, and in such a case, it is difficult to adjust the amount of air diffused.

  Accordingly, an object of the present invention is to provide an air diffuser that can optimally adjust the amount of air diffused.

An air diffuser according to the present invention is installed in an aeration tank and connected to a blower via an air supply pipe. Elevating means for supporting and changing the height position of the air diffuser , and the elevating means has a support part for supporting the air diffuser and an upper end thereof rotatably connected to the support part. Rutotomoni, have a, a plurality of arm portions that are swingable while keeping parallel to each other, a plurality of juxtaposed spraying component into a plurality juxtaposed the aeration unit is a horizontal direction, each of the air diffuser The unit has a header pipe for supplying gas into the plurality of air diffusers of the air diffuser unit, and the header pipes of the air diffuser units are arranged along the direction in which the air diffuser units are arranged side by side. Connected by a connecting member, and external force in the horizontal direction on the connecting member Arm of the lifting means to join, characterized in that the height position of the swing plurality of aeration units are changed along with the support portion.

According to the air diffuser according to the present invention, the air diffuser is installed with its height position changed while being supported by the elevating means. Therefore, since the water depth at which the air diffuser is located is changed and the pressure loss of the gas when the gas is supplied from the blower changes accordingly, the amount of bubbles generated from the air diffuser, that is, the amount of air diffused is optimized. Can be adjusted. Therefore, for example, even when two types of air diffusers having different pressure losses are connected to a common blower in parallel, by adjusting the water depth of each air diffuser appropriately, the air diffuser in each air diffuser The volume can be adjusted optimally. Further, the plurality of arm portions swing while maintaining a parallel state to each other, and at the same time, the support portion rotatably connected to the upper end of the arm portion also swings. And since the height position of the diffuser part supported by the support part is changed by swinging of these arm parts and the support part, the above-mentioned operation and effect can be realized reliably and easily. Moreover, by applying a horizontal external force to the connecting member that connects the header pipes of the plurality of air diffusion units, the arm portion of each lifting means swings together with the support portion, and the height of the air diffusion units is increased. Since the position can be changed at the same time, the amount of air diffused in a plurality of air diffuser units arranged in parallel in the horizontal direction can be collectively adjusted with a simple operation.

  Further, the connecting member is a linear member, and when the winding device for winding the one end of the linear member with respect to the aeration tank and pulling the linear member in the horizontal direction is installed, the winding device is used. By winding the linear member, the height positions of the plurality of air diffusion units can be changed simultaneously, and the air diffusion amounts of the plurality of air diffusion units can be adjusted more easily.

  Also, if the air supply pipe connected to the blower is connected to the diffuser by a flexible pipe, the flexible pipe will follow the diffuser and be deformed and sent when the height position of the diffuser is changed. Since the connection state between the trachea and the diffuser is ensured, the diffuser in the diffuser can be performed without any trouble.

  According to the present invention, the amount of aeration can be adjusted optimally.

1 is a perspective view showing an overall configuration of an air diffuser according to a first embodiment of the present invention. It is a top view of the diffuser of FIG. It is a side view of the air diffusion apparatus of FIG. It is a side view which shows the diffuser tube, mount, and link type support in FIG. It is a perspective view which shows the whole structure of the diffuser which concerns on 2nd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted.

  FIG. 1 is a perspective view showing the overall configuration of the air diffuser according to the first embodiment, FIG. 2 is a plan view of the air diffuser of FIG. 1, and FIG. 3 is a side view of the air diffuser of FIG. . As shown in FIGS. 1-3, the diffuser 1 of this embodiment is installed in the aeration tank 2 of water treatment facilities, such as a sewage treatment plant, for example, and the liquid mixture (treatment target water and activity in the aeration tank 2) A plurality of air diffuser units 3 that are immersed in the sludge) and connected to a blower (not shown), and air is supplied to the air diffuser units 3 from the blower, thereby mixing from the air diffuser unit 3 Aeration is generated by generating bubbles in the liquid.

  More specifically, the air diffuser 1 is provided in parallel in the rectangular aeration tank 2 in the width direction of the aeration tank 2 (left and right direction in FIGS. 2 and 3; hereinafter simply referred to as “width direction”). The aeration tank 3 of the base, the three bases 5 fixed to the bottom of the aeration tank 2 below each of the air diffusion units 3 and arranged in parallel in the width direction, and the length of the aeration tank 2 on each base 5 Link-type support (elevating means) 6 that is vertically installed two by two apart from each other in the vertical direction (vertical direction in FIG. 2; hereinafter, simply referred to as “length direction”) and supports the air diffuser so as to be movable up and down. I have. In this air diffuser 1, an assembly 20 is configured by including one air diffusion unit 3, one frame 5, and two link-type supports 6, and this assembly 20 has three in the width direction. Stands are placed side by side.

  In each assembly 20, the air diffusion unit 3 includes six membrane air diffusers (air diffusers) 4 each extending in the width direction and arranged in parallel in the length direction, and a membrane air diffuser. It has a header pipe 8 that is an air supply pipe that extends in the length direction on the trachea 4 and communicates the inside of the membrane-type air diffuser 4 in an airtight manner. The membrane-type diffuser pipe 4 has a structure in which a membrane having many fine holes is wound around a pipe portion extending from the attachment position to the header pipe 8 on both sides, and the air fed by the blower is supplied to the header pipe. 8 is a so-called ultrafine bubble diffuser that is introduced into the inside through 8 and generates fine bubbles from a large number of holes in the membrane. These membrane type air diffusers 4 are also referred to as “membrane pipe type ultrafine bubble type air diffusers”.

  On the other hand, an air supply pipe 9 for supplying air from the blower to the air diffusion unit 3 is arranged in the aeration tank 2. The air supply pipe 9 extending from the blower is laid in the vertical direction along one side wall in the width direction of the aeration tank 2, and further bent in an L shape so as to cross the upper vicinity of the three air diffusion units 3. The extending portion 9a is extended to the end. And this extension part 9a is connected to the longitudinal direction center part of the header pipe | tube 8 of each aeration unit 3 by flexible pipe | tubes 10 of the bellows structure etc. which can deform | transform flexibly. Thus, the extending portion 9 a of the air supply tube 9 is connected to the membrane-type air diffuser tube 4 by the flexible tube 10.

  The gantry 5 is configured by using, for example, an angle material as a skeleton member, and has a main body 5a having a height of about several tens of centimeters from the bottom of the aeration tank 2 and a substantially rectangular parallelepiped shape, It is comprised by the support part 5b which protruded upwards from the four corners of 5a (refer FIG. 3). On the upper surface of the main body part 5a, the main body part 5a is formed at the middle position between the two membrane ends of the six membrane-type air diffusion pipes 4 of the air diffusion unit 3 and the two at the center. An attachment member 11 for connecting members extending in the vertical direction is provided for standing the link type support 6 (see FIG. 2).

  As shown in FIGS. 1 and 3, the support portions 5b at the four corners include two extending portions 12 extending upward from one end portion (left end portion in FIG. 3) in the width direction of the main body portion 5a, The main body 5a has two extending portions 13 (one is hidden and cannot be seen) extending upward from the other end in the width direction (the right end in FIG. 3). The extension length of the extension portion 12 from the main body portion 5a is, for example, about several tens of centimeters, and the extension length of the extension portion 13 from the main body portion 5a is shorter than the extension length of the extension portion 12, for example, ten It is about cm. A support plate 14 on which the header pipe 8 is placed when the height position of the air diffusion unit 3 is highest is fixed to the upper end of the extension portion 12 as a horizontal plate. A support plate 15 on which the header pipe 8 is placed when the height position of the air diffusion unit 3 is lowest is fixed to the upper end of the extension portion 13 as a horizontal plate.

  FIG. 4 is a side view showing the air diffusion unit 3, the gantry 5, and the link type support 6. The link type support 6 is for supporting the air diffusion unit 3 and changing the height position of the air diffusion unit 3 to install the air diffusion unit 3. The link type support 6 is attached to the attachment member 11 (FIG. 1 and FIG. 1). 2), the base ends of which are pivotably attached to the mounting member 11 near one end in the width direction (leftward in FIG. 4), and two of them are arranged side by side apart from each other in the width direction. The arm portions 21 and 21, and the support portions 22 that extend in the horizontal direction at the upper ends of the arm portions 21 and 21 to connect the arm portions 21 and 21 to each other and are rotatably connected to the arm portions 21 and 21. have. The distance between the base ends of the arm parts 21 and 21 attached to the mounting member 11 and the support part 22 is substantially equal to the distance between the upper ends, whereby the arm parts 21 and 21 are arranged in parallel. Yes. The lengths of the arm portions 21 and 21 are substantially equal to the distance from the mounting member 11 to the support plate 14, and the upper surface of the support plate 14 and the upper surface of the support portion 22 with the arm portions 21 and 21 standing upright ( The lower end of the header pipe 8 is substantially flush with the header pipe 8.

  The header pipe 8 is placed and fixed on the support portion 22 of the link type support 6. In the link type support 6 having such a configuration, the arm portions 21 and 21 can swing around an axis extending in the length direction while maintaining a state parallel to each other. As the arm portions 21 and 21 swing, The support portion 22 swings while maintaining a horizontal state. In other words, the link-type support 6 constitutes a link mechanism that is swingable while forming a parallelogram by the mounting member 11, the arm portions 21, 21, and the support portion 22. As the link type support 6 swings, the membrane type air diffusion pipe 4 of the air diffusion unit 3 fixed to the upper part of the link type support 6 is supported by the link type support 6 via the header pipe 8 while being supported by the link type support 6. The height position can be changed (lifted).

  Furthermore, as shown in FIGS. 1 to 3, the air diffuser 1 is a wire that is a connecting member that is arranged in the width direction (the direction in which the air diffuser units 3 are arranged) and connects the header pipes 8 of the air diffuser units 3. (Linear member) 23 and a winding device 24 which is installed on one upper wall connected to the side wall constituting the aeration tank 2 and winds one end of the wire 23 to pull the wire 23 in the horizontal direction. ing. The wire 23 extends in the width direction via pulleys 25 and 26 fixed to one upper wall and side wall, and is engaged in the vicinity of the center in the longitudinal direction of each header pipe 8 and opposite to the winding device 24. The end of the shaft extends downward through a pulley 27 provided on the opposite side wall and is tensioned by a weight 28. The wire 23 has a spring portion 29 that expands and contracts in the width direction and in the horizontal direction between the header tubes 8.

  In the air diffuser 1 configured as described above, one end of the wire 23 is wound up by the winding device 24, whereby a tensile force in the horizontal direction (left direction in FIG. 3) is applied to the wire 23. As a result, the link type The arm portions 21 and 21 of the support 6 swing with the support portion 22, and the height position of the air diffusion unit 3 is raised. And when the header pipe | tube 8 is mounted on the support plate 14 of the mount frame 5, the height position of the aeration unit 3 will be in the highest state (position P1 shown with the virtual line of FIG. 4).

  Further, by drawing the wire 23 by the winding device 24, a tensile force in the horizontal direction (right direction in FIG. 3) is applied to the wire 23 due to the weight of the weight 28, and as a result, the arm portions 21, 21 of the link type support 6. Swings together with the support portion 22, and the height position of the air diffusion unit 3 is lowered. And when the header pipe | tube 8 is mounted on the support plate 15 of the mount frame 5, the height position of the aeration unit 3 will be in the lowest state (position P2 shown with the virtual line of FIG. 4).

  Furthermore, by adjusting the length of winding the wire 23 by the winding device 24, the air diffusion unit 3 is stopped between the position P1 where the height position of the air diffusion unit 3 is the highest and the position P2 where it is lower. (For example, the position P3 indicated by the solid line in FIG. 4).

  According to the air diffuser 1 of the present embodiment described above, the membrane air diffuser 4 is installed with its height position changed while being supported by the link support 6, so that the position of the membrane air diffuser 4 is The water depth to be changed can be changed, and the pressure loss of the gas when the gas is supplied from the blower can be changed. As a result, the amount of bubbles generated from the membrane-type air diffuser 4, that is, the amount of air diffused is optimized. Can be adjusted. Therefore, for example, even when two types of diffuser pipes and diffuser plates with different pressure losses are connected to a common blower, the amount of diffused air can be optimized by appropriately adjusting the water depth. Can be adjusted.

  More specifically, for example, in a treatment plant that uses a diffuser plate (eg, a diffuser diffuser plate) having a pressure loss smaller than that of a membrane diffuser tube, a membrane diffuser is used instead of a part of the diffuser plate. When the trachea 4 is introduced and the membrane diffuser 4 and the diffuser plate are connected to the blower, the height position of the membrane diffuser 4 by the link support 6 relative to the height at which the diffuser plate is installed. It is possible to adjust the water depth in each of the air diffuser plate and the membrane type air diffuser tube 4 by adjusting the air flow etc., and to adjust the amount of air diffused in the membrane type air diffuser tube 4 and the air diffuser plate optimally. it can.

  In addition, the plurality of arm portions 21 and 21 swing while maintaining a parallel state, and at the same time, the support portion 22 rotatably connected to the upper ends of the arm portions 21 and 21 also swings. Since the height position of the air diffusion unit 3 supported by the support part 22 is changed by the swinging of the arm parts 21 and 21 and the support part 22, the above-described operation and effect can be realized reliably and easily. .

  Further, by applying an external force in the horizontal direction to the wires 23 that connect the header pipes 8 of a plurality (three in this case) of the air diffusion units 3, the arm portions 21, 21 of each link type support 6 are supported. Since the height position of a plurality of (three) aeration units 3 can be changed at the same time by swinging together with the portion 22, the amount of aeration in a plurality of aeration units 3 arranged in parallel in the horizontal direction can be collectively controlled by a simple operation. Can be adjusted.

  Moreover, since the winding device 24 for winding up one end of the wire 23 and pulling the wire 23 in the horizontal direction is installed, the height of the air diffusion unit 3 can be obtained by winding the wire 23 using the winding device 24. The positions can be changed at the same time, and the amount of air diffused by the plurality of air diffuser units 3 can be adjusted more easily with a simple operation.

  Moreover, since the extending part 9a of the air supply pipe 9 connected to the blower is connected to the membrane type air diffusion pipe 4 by the flexible pipe 10, when the height position of the membrane type air diffusion pipe 4 is changed, the flexible pipe 10 is deformed and moved following the membrane-type air diffuser 4 so that the connection state between the air-feed tube 9 and the membrane-type air diffuser 4 is maintained, and air diffused in the air diffuser unit 3 can be performed without any trouble.

  Moreover, since the spring part 29 which expands-contracts in the horizontal direction is provided between the header pipes 8 connected by the wire 23, the air diffuser unit 3 can be lifted and lowered in the lifting operation. It can be done smoothly.

  FIG. 5 is a perspective view showing the overall configuration of the air diffuser according to the second embodiment. FIG. 5 shows a case where three diffusers 1A each having the same configuration are arranged in the width direction.

  The air diffuser 1A of the present embodiment shown in FIG. 5 is different from the air diffuser 1 of the first embodiment in that the air diffuser units 3 are juxtaposed in the length direction and the header pipes 8 of the air diffuser unit 3 are connected to each other. Instead of the link-type support 6 that can be swung around an axis extending in the length direction, the wire 23 that connects the two can be swung around an axis extending in the width direction. Instead of a link type support (lifting means) 30 and a pulley 27 and a weight 28 for tensioning the wire 23, a winding device 34 for winding the other end of the wire 23 so that the wire 23 maintains a constant tension. It is a point provided. In the air diffuser 1 </ b> A, the winding device 34 is provided on the upper wall opposite to the winding device 24 with the aeration tank 2 interposed therebetween, and the wire 23 is wound via the pulleys 32 and 33. I am nervous.

  In the air diffuser 1 </ b> A configured in this way, the other end of the wire 23 is fed out by the winding device 34 while winding the one end of the wire 23 by the winding device 24, thereby diffusing with the swing of the link type support 30. Unit 3 can be raised. Contrary to this, by winding one end of the wire 23 by the winding device 24 while winding the other end of the wire 23 by the winding device 34, the air diffusion unit 3 is lowered together with the swinging of the link type support 30. be able to. Furthermore, the air diffuser 3 is stopped between the position where the height position of the air diffuser unit 3 is highest and the position where the height position of the air diffuser unit 3 is lowered by appropriately winding and unwinding the wire 23 by the winding devices 24 and 34. Can be made.

  According to the air diffuser 1A of this embodiment, the swing direction is changed, but the same operation and effect as the air diffuser 1 of the first embodiment described above can be obtained.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment. For example, although the case where the connecting member is the wire 23 has been described in the above embodiment, other linear members such as a chain may be used. Moreover, about the member which connects header pipe | tubes 8, it is not restricted to a linear member, You may use a highly rigid member.

Moreover, although the said embodiment demonstrated the case where the diffuser unit 3 was comprised by the some membrane type diffuser tube 4 and the header pipe | tube 8, the structure of an diffuser unit is not restricted to this. For example, distributed not limited to the case of using the pipe 4 diffusing membrane type as a gas portion may be a membrane type of diffuser air plates may be used conventional diffuser tubes or diffuser plate is not a membrane type.

  Furthermore, the gas supplied by the blower is not limited to air, and may be pure oxygen or the like for an aerobic treatment, for example. Carbon dioxide may be supplied when photosynthetic microalgae are the target.

  DESCRIPTION OF SYMBOLS 1,1A ... Air diffuser, 2 ... Aeration tank, 3 ... Air diffuser unit, 4 ... Membrane type air diffuser (air diffuser), 6, 30 ... Link type support (lifting means), 8 ... Header pipe, 9, 9a ... Air supply pipe, 10 ... Flexible pipe, 21 ... Arm part, 22 ... Support part, 23 ... Wire (linear member), 24, 34 ... Winding device.

Claims (3)

An aeration unit that is installed in an aeration tank and connected to a blower via an air supply pipe, and generates bubbles by supplying gas from the blower,
Elevating means for supporting the air diffuser and changing and setting the height position of the air diffuser , and
The lifting means is
A support part for supporting the air diffusion part;
With its upper end is rotatably connected to with respect to the supporting unit, have a, a plurality of arm portions that are swingable while keeping parallel to each other,
A plurality of aeration units in which a plurality of the aeration parts are arranged side by side are arranged in parallel in the horizontal direction,
Each of the air diffusion units has a header pipe for supplying the gas into the plurality of air diffusion portions of the air diffusion unit, and
The header pipes of each of the plurality of air diffusion units are connected by a connecting member disposed along the direction in which the air diffusion units are arranged,
An air diffuser characterized in that a horizontal external force is applied to the connecting member, whereby the arm portion of the elevating means swings together with the support portion, and the height positions of the air diffuser units are changed . The connecting member is a linear member,
The relative aeration tank, the linear member diffuser according to claim 1, wherein the winding the linear member the one end winding device for pulling in the horizontal direction is installed in. Wherein said air supply pipe connected to a blower, an air diffuser according to claim 1, wherein it is connected to the spraying component by a flexible tube.

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