JP4943482B2 - Underwater aerator - Google Patents

Description

  The present invention relates to an underwater aerator. More specifically, the aerator is provided with an air diffuser so that the amount of dissolved oxygen in water can be increased. In particular, the bubbler position of the air diffuser is located immediately after the outlet end of the water flow outlet. The present invention relates to an underwater aerator characterized in that the bubble diffusion range can be widened by providing it close to the front and the bubble size can be variably adjusted.

  As is well known, the method for treating contaminated water with microorganisms is a method for gradually reducing organic substances by growing aerobic microorganisms that feed on organic substances contained in contaminated water.

  Purification work with aerobic microorganisms requires the creation of an environment suitable for the inhabiting of microorganisms, while organic matter that is the source of microorganisms is continuously supplied. However, such a device is referred to as an underwater aerator (or aerator: hereinafter referred to as “aerator”). Such an aerator sucks treated water (contaminated water) from the upper part of the suction housing by negative pressure generated by the rotational force of the impeller connected to the submersible motor, and in the suction direction. In addition to discharging in the reverse direction, the air flowing into the diffuser (diffuser) is piggybacked in the discharge direction of the treated water so that it can be discharged along with it. Or increase and create an environment that activates aerobic microorganisms.

  However, since the basic performance of such aerators is limited, in order to increase the amount of dissolved oxygen in the treated water or to increase the oxygen transfer rate, several aerators are provided or large Since it must be replaced with a capacity aerator, installation costs and operating costs increase.

  On the other hand, in order to expand the oxygen diffusion range with the same level of power and increase the dissolved oxygen amount, the air supply amount can be increased. However, if the air supply amount is too large, it will not be diffused and cavitation will occur. : A vacuum part generated on the back side of a rotating propulsion unit or the like) phenomenon occurs. Therefore, the method of simply increasing the supply air amount has a limit in expanding the diffusion range and increasing the dissolved oxygen amount.

  In order to solve this problem, the present applicant has proposed a configuration in which a diffuser tube is attached to an aerator in Patent Document 1.

  As shown in FIG. 1, the above-mentioned Patent Document 1 further includes an air diffuser provided in a normal aerator, and the air diffuser is provided by a water flow discharged from a water flow outlet 2 arranged in the circumferential direction of the discharge housing 1. By allowing the air bubbles discharged from the air diffuser 3b 3 to diffuse, in addition to the air bubbles discharged from the aerator itself, additional air bubbles are generated from the air diffuser and the amount of generated air bubbles is increased. It is what I tried.

  However, the above-mentioned Patent Document 1 has a large bubble size discharged from the air diffuser 3b, is not diffused far by the discharge water flow, and floats immediately on the water surface by buoyancy and air supply pressure, so that the effect of increasing the amount of dissolved oxygen is somewhat. It was weak.

  In addition, the position of the air diffuser 3b through which the bubbles are discharged is far from the water flow outlet 2, and the influence of the discharged water flow is weakened, and the diffusion effect is reduced. This also serves as a limiting factor in increasing the amount of dissolved oxygen.

  On the other hand, when an example in the aerator presented in Patent Document 2 is seen, a casing 4 as shown in FIG. 2 is formed of a double skin, and a space through which air can pass is formed. Is formed with a plurality of diffuser holes 4a toward the discharge port 5 so that the casing itself can serve as a diffuser tube. In addition, a diffused gas 7 communicating with the air supply pipe 6 is formed below the discharge port 5 so that bubbles are discharged toward the discharge port 5.

  However, in the above-mentioned Patent Document 2, the bubbles discharged from the casing 4 and the bubbles discharged from the diffused gas 7 are disturbed and collide with each other at the discharge port 5, thereby causing a cushion phenomenon between the bubbles and reducing the discharge force of the water flow. There was a problem of weakening and inhibiting the bubble diffusion effect.

  In addition, when air is jointly supplied to the central diffuser 8 and the diffused gas 7 via the air supply pipe 6, there is no air amount adjusting device, and there is a high possibility that the air is supplied to one side. As for the supplied air, the air is biased only on the side close to the air supply pipe 6, and the phenomenon that the bubbles are not uniformly diffused occurs. Accordingly, since a relatively large amount of bubbles is discharged to a specific discharge port and a small amount of bubbles is discharged to other discharge ports located far from the air supply pipe 6, the bubbles can be uniformly diffused. There was a problem that was difficult.

  Further, Patent Documents 1 and 2 do not have a function that can adjust the bubble size in common. That is, the air diffusion holes 3b, 4a and 7a formed in the air diffusion tube 3a of Patent Document 1 and the casing 4 and air diffusion 7 of Patent Document 2 have a structure in which the hole diameter cannot be changed. Therefore, changing the hole diameter is not efficient because the entire aerator must be changed.

Korean Patent Registration No. 10-542865 Korean Published Patent Publication No. 10-2007-17429

  Therefore, the present invention has been proposed to solve the above-described conventional problems, and the main object of the present invention is to increase the amount of dissolved oxygen in water by providing a diffuser. An object of the present invention is to provide an aerator that can be used.

  Another object of the present invention is to provide an aerator in which the bubble diffusion range can be further expanded by providing the bubbler position of the air diffuser close to the outlet end of the water flow outlet. There is.

  Still another object of the present invention is to provide an aerator capable of arbitrarily adjusting the bubble size through replacement of the perforated plate by providing the perforated plate in an assembling manner.

  According to the first embodiment of the present invention for achieving the above object, the aerator main body is provided with a diffuser tube, and the bubbler of the diffuser tube is positioned so as to be close to the outlet end of the water flow outlet. This is an underwater aerator characterized by further including the above.

  Further, according to the second embodiment for achieving the above object, the air supplied from the air supply pipe is bubbled through a gap formed at the lower end of the diffuser, and the bubbles are discharged to several water flow outlets. In the aerator for piggybacking on the water flow to be diffused in the water, the aerator main body is provided with an air diffuser pipe directly or indirectly connected to the diffuser, and the air diffuser pipe is connected to the air diffuser. A chamber body that is assembled at the bottom of the aerator body while being fitted outside the discharge side of the trachea, is connected to the diffuser, is connected to be communicated with the chamber body, and is supplied from the chamber body An underwater aerator comprising: a diffuser ring that allows air to be discharged in the form of bubbles.

  In the present invention described above, a diffuser is provided in addition to the aerator, and a larger amount of oxygen can be supplied to the water (contaminated water).

  Moreover, the bubble diffusion range can be further expanded by providing the bubbler position of the above-mentioned apparatus close to the outlet end of the water flow outlet.

  Furthermore, by providing the perforated plate in an assembling manner, the bubble size can be adjusted according to the situation through replacement of the perforated plate.

It is one Example of the underwater aerator provided with the conventional diffuser. It is another Example of the underwater aerator provided with the conventional diffuser. It is the whole assembly perspective view of the underwater aerator concerning the present invention. It is a longitudinal cross-sectional view of FIG. It is a top view of the aeration apparatus concerning the present invention. It is the perspective view which extracted and illustrated the aeration apparatus concerning the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

  The technical contents of the aerator according to the present invention will be described in detail with reference to the accompanying drawings.

  3 is an overall perspective view of the aerator according to the present invention, FIG. 4 is a longitudinal sectional view of FIG. 3, FIG. 5 is a plan view of the air diffuser according to the present invention, and FIG. It is the perspective view which extracted and illustrated the aeration apparatus concerning.

  In the present invention, the air supplied from the air supply pipe 11 is bubbled through a gap 12a formed at the lower end of the diffuser 12, and the bubbles are piggybacked on the water flow discharged to several water flow discharge ports 13 to be submerged in the water. The aerator body 10 is configured to be diffused.

  A diffuser pipe 20 that communicates directly or indirectly with the diffuser 12 is provided in the lower part of the aerator body 10 so that the efficiency of air diffusion can be increased.

  Here, looking at the configuration of an example of the diffuser tube 20, a chamber body that is screwed to the bottom of the aerator body 10 and is in communication with the diffuser 12 while being fitted outside the discharge side 11 a of the air supply pipe 11. 21; and a diffuser ring 22 that is connected to communicate with the chamber body 21 and discharges air supplied from the chamber body 21 in the form of bubbles.

  As described above, the chamber main body 21 is formed with the air inflow hole 21a communicating with the central hole 10b formed in the bottom surface 10a of the aerator main body 10, and a part of the air supplied into the diffuser 12 by the air supply pipe 11 Is configured to flow into the interior of the chamber body 21. Here, the chamber main body 21 may be directly connected to the diffuser 12 or indirectly connected by another medium.

  An airtight gasket 23 is provided at the end of the lower hole 21 c formed in the bottom surface 21 b of the chamber body 21. The gasket 23 is formed so as to extend long in the direction of the air supply pipe 11 from the contact end of the lower hole 21c with the air supply pipe 11, and by fitting the chamber body 21 downward from the upper part of the air supply pipe discharge side 11a, A part of the gasket 23 extending from the contact end portion of the lower hole 21c is configured to be bent upward. At this time, the gasket 23 can maintain an airtight force when the bent portion 23 a is pressure-bonded to the surface side of the air supply pipe 11 by the internal pressure in the chamber body 21.

  One or more connection pipes 24 are provided in the chamber main body 21 and the diffuser ring 22 described above. At this time, the connection pipe 24 and the chamber body 21 are connected to each other by a first bridge pipe 25, and the connection pipe 24 and the diffuser ring 22 are connected to each other by one or more second bridge pipes 26. It is connected so that it may communicate. Accordingly, the air that has flowed into the chamber body 21 passes through the first bridge pipe 25, the connection pipe 24, and the second bridge pipe 26 in order, and then is discharged into the water through the air diffusion ring 22.

  As described above, the first bridge pipe 25 is preferably provided with an opening / closing valve 25a for opening / closing the first bridge pipe 25. The opening / closing valve 25a serves to adjust or block the amount of air passing through the first bridge pipe 25.

  On the other hand, the diffuser ring 22 is provided in the diffuser ring body 220 having the chamber part 221 communicated by the connection pipe 24 and the second bridge pipe 26, and the diffuser ring body 220, and is provided in the chamber part 221. And a bubbler 225 that makes the air into fine bubbles.

  The bubbler 225 includes a perforated portion 226 formed on the upper surface 222 of the diffuser ring main body 220, and a perforated plate 227 that is assembled on the perforated portion 226 and makes air discharged through the perforated portion 226 into fine bubbles. It consists of. Since the porous plate 227 is formed with pores 227a for making air into fine bubbles, when the bubbles are further refined or the bubbles are made a little larger, the current porous plate is replaced with another porous plate 227a. If the plate is replaced, bubbles having a desired size can be obtained.

  The bubbler 225 is preferably provided in close contact with the outlet end 13a of the water flow outlet 13 so as to be greatly influenced by the water flow.

  Further, it is preferable that the upper surface 222 of the diffuser ring main body 220 is inclined at an angle similar to the gradient direction of the water flow outlet 13. The reason is that the flow direction of the water flow discharged from the water flow discharge port 13 and the upper surface of the diffuser ring main body 220 adjacent thereto have the same gradient angle, thereby allowing the water flow to proceed smoothly. This is because the bubbles discharged from the upper surface of the diffuser ring body can be diffused as far as possible by the smooth water flow.

  On the other hand, it is preferable that guide plates 228 are provided on both sides of the bubbler 225 of the diffuser ring body 220 to guide the water flow and the bubbles so that they are not dispersed when discharged. The guide plate 228 can increase the diffusibility of the bubbles by guiding the water flow and the bubbles to a certain part so that the water flow and the bubbles are not dispersed in all directions and have straightness.

  The operation of the present invention configured as described above will be described as follows.

  The air supplied through the air supply pipe 11 flows into the diffuser 12. Part of the air that has flowed into the diffuser 12 is piggybacked on the water flow that flows from the upper part to the lower part of the suction housing 14 through the gap 12 a formed at the lower end of the diffuser 12, and is discharged through the water discharge port 13. The

  Meanwhile, the other part of the air that has flowed into the diffuser 12 flows into the chamber body 21 through the central hole 10b formed in the bottom surface 10a of the aerator body 10, and the air that has flowed into the chamber body 21 is After sequentially passing through the first bridge pipe 25, the connecting pipe 24, and the second bridge pipe 26, it is discharged into the water through the perforated plate 227 of the diffusion ring 22.

  At this time, the bubbler 225 of the diffuser ring 22 is provided so as to be in close contact with the outlet end 13 a of the water flow discharge port 13, so that the influence of the discharge water flow can be greatly received and discharged from the bubbler 225. Allow bubbles to diffuse far away. Further, since the porous plate 227 is provided in an assembling manner, when it is determined that the bubble size is not appropriate, the porous plate 227 may be replaced with a porous plate having a different pore size.

  On the other hand, in the above description, the lower discharge method in which the water flow is sucked from the upper portion of the aerator body 10 and discharged from the water flow discharge port 13 is taken as an example, but it is sucked from the lower portion of the aerator body 10 and discharged from the water flow discharge port 13. In addition, the technique of the present invention can be applied to the upper discharge method.

DESCRIPTION OF SYMBOLS 10: Aerator main body 20: Air diffuser pipe 21: Chamber main body 22: Air diffuser ring 23: Gasket 24: Connection pipe 25: 1st bridge pipe 26: 2nd bridge pipe 220: Air diffuser ring main body 221: Chamber part 225: Bubbler 226 : Perforated part 227: Perforated plate 228: Guide plate

Claims (9)

A suction housing (14) formed with a water flow outlet (13) for discharging the sucked treated water;
Air installed in the suction housing (14) and installed on the discharge side (11a) of the air supply pipe (11) and supplied from the air supply pipe (11) is exchanged with the bottom of the suction housing (14). A diffuser (12) that bubbles through a gap;
It is installed at the lower end of the suction housing (14) so as to communicate with the diffuser (12), and the bubbled air formed by the diffuser (12) is close to the outlet end of the water flow outlet (13). An air diffuser (20) that discharges to a position;
With
The air diffuser (20)
A chamber body (21) that is assembled at the lower end of the suction housing (14) while being fitted to the outside of the discharge side (11a) of the air supply pipe (11), and communicates with the diffuser (12);
It is installed at a position close to the outlet end of the water flow outlet (13), is connected so as to communicate with the chamber body (21), and discharges air supplied from the chamber body (21) in the form of bubbles. Qi ring (22) and
Have
The bubbled air discharged by the air diffusion ring (22) of the air diffusion pipe (20) is piggybacked on the water flow discharged from the water flow discharge port (13). Underwater aerator. Between said chamber body (21) and said diffuser ring (22), connecting pipe (24) is provided, said chamber the connection pipe main body (21) (24), first bridge pipe (25) It is connected by the connecting pipe (24) and said diffuser ring (22), water aerator of claim 1, characterized in that connected by a second bridge pipe (26). Water aerator according to claim 2, characterized in that it comprises a closing valve (25a) for opening and closing the first bridge pipe (25). The diffuser ring (22) includes a diffuser ring body having a connection pipe (24) and the chamber portion which is communicated by the second bridge pipe (26) (221) (220), said air diffuser ring body ( provided 220), when the air in the chamber portion (221) is discharged, the water aerator of claim 2, characterized in that a bubbler (225) for fine bubble the air, in configured . The bubbler (225), said air diffuser ring body (220) perforated portion formed on the upper surface of the (226), assembled on the drilling portion (226) is discharged through the perforated section (226) water aerator according to claim 4, perforated plate (227), in characterized in that it is configured to fine bubbles of air that. On both sides of the bubbler (225) of the diffuser ring body (220), when the water flow and air bubbles are discharged, claim, characterized in that guide plates for guiding so as not to be distributed (228) is provided 4 Or the underwater aerator according to 5 . The underwater aerator according to claim 6 , wherein the upper surface of the air diffusion ring body (220) is inclined at an angle similar to the inclination direction of the water flow outlet (13) . The underwater aerator according to claim 2 , wherein a gasket (23) is provided at a contact end portion of the chamber body (21) with the air supply pipe (11) . Said gasket (23), said air line from the contact end (11) is formed so as to extend long in the side, fitting the said chamber body (21) downwardly from the top of the discharge side of the feed pipe (11) The underwater aerator according to claim 8 , wherein a part (23a ) of the gasket (23) extending from the contact end portion is deformed so as to be bent upward.

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