KR100583052B1 - Underwater Aerators with Improved Aeration Capacity and Dispersion Function - Google Patents

Abstract

The present invention relates to an underwater aeration device having aeration function and agitation function and increasing dissolved oxygen concentration in aquaculture and sewage water treatment, wherein a cylindrical or truncated conical diffuser is installed at a lower portion of a rotary blade installed on a drive shaft of a drive motor. The inside of the diffuser is empty, the upper part is closed and the lower part is opened to form a circular air inlet. The air inlet tube is inserted into the air inlet communicating with the outlet of the blower. In the underwater bubble machine fixed to the cylindrical casing or support provided with the water discharge port; An air outlet is also provided on the side of the diffuser to increase aeration capacity, and on one side or both sides of the water flow inlet and the aeration flow outlet, an air supply pipe equipped with a diffuser having a porous, nozzle-type, or ejector-type exhaust pipe is provided. The present invention relates to an underwater aeration apparatus, in which an air diffuser is directly connected to a drive shaft of a drive motor, and an ejecting air induction means or a water flow induction means provided in the diffuser can be omitted in parallel with the function of a rotor blade. .

Underwater equipment, diffusers, diffusers

Description

Submersible Aerator with the Encreased Capacity of Aeration and Ability of Diffusion}

1 is a conceptual diagram of a first embodiment of the underwater bubble apparatus according to the present invention;

Figure 2 is a perspective view of the diffuser for the configuration of the underwater bubble apparatus according to the present invention,

3 to 6 is a conceptual diagram of the second to fifth embodiments of the underwater bubble apparatus according to the present invention.

※ Explanation of code about main part of drawing ※

1: drive motor 2: drive shaft

3: rotor blade 31: rotating plate

4: air diffuser 41: side air outlet

42: lower air outlet 43a, 43b: diffuser

5: casing 51: water flow inlet

52: Abandoned water discharge port 6: Inlet pipe

7: delivery pipe 8: ejector

81: primary fluid supply port 82: secondary fluid supply port

83: mixed fluid outlet 84: nozzle

9a, 9b: blowing air inducing means 10: water flow inducing means

11: support 12: removable device

The present invention relates to an underwater air bubbler having an aeration function and a stirring function and used in aquaculture and sewage treatment to increase the dissolved oxygen concentration.

Underwater foam apparatus equipped with a conventional diffuser function and agitating function is installed in water to disperse the air pumped from the blower into a small bubble, and mixed and stirred with the reaction liquid.

Referring to the configuration of the conventional method for underwater crawler, two to four rotary blades are installed in the drive shaft of the three-dimensional drive motor, the lower portion of the rotary blades is installed in the container-type diffuser, the upper and side of the diffuser is sealed, A circular opening is formed in the lower part of the diffuser in which the air pipe is interpolated, and a tube end of the exhaust pipe communicating with the discharge port of the blower is interpolated or installed in the lower opening of the diffuser. The drive motor is fixedly installed on the upper portion of the casing to operate inside the casing provided with the discharge port.

Referring to the conventional method of operation of the underwater aerator, the water flow generated by the rotation of the rotor blades radially flows down through the space between the casing and the diffuser, while reducing the air flowing out from the periphery of the opening that is circularly open at the bottom of the diffuser. Aeration and stirring are achieved by dispersing it into bubbles, and the following problems are pointed out in efficiency, capacity, and stability.

① The air that simply flows out by buoyancy at the bottom of the diffuser is dispersed into small bubbles by the radial water flow formed in the rotor blades, so the air bubbles are not finely dispersed and the air is supplied largely compared to the flow rate of the radial water flow. Since air bubbles rise to the surface, there is a problem that the specific surface area and residence time of bubbles are small and the oxygen transfer rate is low.

② It is a configuration that needs to increase the power for the formation of water flow in proportion to the amount of air flow. Therefore, if the reactor capacity is small and the DO demand is large, that is, the amount of air flow is high and the stirring force is relatively small. Since excessive stirring power is supplied, there is a problem in that the microbial floc is dismantled and the sedimentability is lowered and power is wasted due to excessive stirring.

In addition, if the agitation power is reduced in accordance with the reactor capacity, a large part of the air flow rate is not finely dispersed and rises as coarse bubbles, so that the gas-liquid contact is not properly made and the oxygen transfer rate is drastically lowered to satisfy the dissolved oxygen demand. .

③ Even when the aeration of water is slightly inclined, a large amount of air flows out to one side of the above-mentioned diffuser, so that it rises as a coarse bubble and the oxygen transfer rate decreases.

④ Aeration and agitation are performed by the low lift drift pump, which is mainly equipped with a four-wheel rotary vane inside the cylindrical case of the upper inlet lower discharge or lower inlet upper discharge type. This is weakened.

Accordingly, the present invention has been made to solve the above-described problems, the object of the present invention is to provide an underwater bubble apparatus having high oxygen transfer rate and excellent efficiency and stability.

In order to achieve the above object, in the present invention, a rotor blade is installed in a drive shaft of a drive motor, and a lower portion of the rotor blade is provided with a cylindrical cylinder or truncated cone-type container having an empty inside thereof. The upper part of the diffuser is sealed and the lower part is opened to form a circular air inlet, the end of the air inlet is inserted into the air inlet, the air inlet is installed to communicate with the outlet of the blower, The drive motor is provided with an air outlet on the side of the diffuser in the aquatic device fixedly installed in a cylindrical casing or support provided with a water flow inlet and aeration water discharge outlet to increase the aeration capacity.

The side of the diffuser is composed of a woven mesh of a perforated plate or a metal wire to form a plurality of fine air outlets. In addition, the side surface of the diffuser may be formed of a plate having a circular, oval, polygonal opening or a slit-shaped air outlet of narrow and long shape in the horizontal, vertical, and inclined directions.

The air outlet is provided with a curved or shell-shaped blow-out air inducing means so that air is finely dispersed and negative pressure is applied to the air outlet, and the air outlet and outlet air inducing means are provided so that water flow can be concentrated on the air outlet side. Both sides may be provided with a flow guide means of a viscous tubular or plate-shaped open.

By connecting the diffuser directly to the drive shaft of the drive motor, the jet air inducing means or the water flow inducing means provided in the diffuser improved the function of the rotor blades in parallel and omits the rotor blades.

One side or both sides of the water flow inlet or the aeration flow outlet of the casing is provided with an air supply pipe with a plurality of diffusers, or by providing a large number of micropores in the air supply pipe itself, so that the micro bubbles ejected from the diffuser are It flows into the water inlet and diffuses into the aeration outlet, and moves to the side by the water jet ejected at a high speed from the aeration. Improved as possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an embodiment of an underwater bubble apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of an underwater bubble apparatus according to the present invention.

Referring to the configuration of the apparatus for aquatic apparatus according to the present invention, one or more rotary blades (3) is installed on the drive shaft (2) of the drive motor (1), and the diffuser (4) is installed below the rotary blades The diffuser is in the form of a cylindrical or frustoconical container with a space therein. The upper portion of the diffuser 4 is closed and the lower portion of the diffuser pipe 6 is inserted into the lower portion of the diffuser to open a circular air inlet. The side air blower 41 is provided on the side of the diffuser 4. In the clearance between the lower part of the said diffuser 4 and the said casing 5, the lower air outlet 42 of an annular ring is comprised.

In the air inlet, a pipe end of the air intake pipe 6 communicating with the air outlet of the blower is interpolated or installed in close proximity, and the rotor blade 3 and the acid diffuser 4 are provided with a water flow inlet 51 and an aeration water outlet 52. The drive motor 1 is fixedly installed in the casing 5 so as to operate inside the casing 5 for guiding water flow in a predetermined direction.

The diffuser 4 is fixed to the casing or directly connected to the rotary shaft 2 to rotate together with the rotary blade 3.

Referring to the operation of the underwater bubble apparatus according to the present invention, the radial water flow generated by the rotation of the rotor blade 3 is discharged from the side air jet port 41 while flowing radially along the periphery of the diffuser (4) Aeration and stirring are performed by dispersing the air into fine bubbles and dispersing the air flowing out around the annular lower air jet port 42 provided between the diffuser and the casing in the lower part with a small bubble.

As such, the air supply capacity of the underwater bubble apparatus is mainly determined by the size, number, and structure of the side air ejection openings 41, and the influence of the water flow generated by the driving motor 1 and the rotor blade 3 is reduced, thereby forming the water flow. The problem of power waste and abandonment efficiency deterioration can be alleviated, and since a large amount of air is ejected from the side air outlet 41 and the air outlet amount from the lower air outlet 42 is required to be precisely horizontal, Even when installed at an inclined degree to some degree, a sharp drop in aeration efficiency can be prevented.

An air inlet pipe 7 having a plurality of diffusers 43a and 43b is installed in the casing 5 on either or both sides of the water flow inlet 51 or the aeration water discharge port 52. (7) in communication with the air pipe (6) to increase the aeration capacity by the air blown by one air pipe (6) is ejected from the air diffuser (4) and the air diffusers (43a, 43b) I was.

The diffusers 43a and 43b may be selected from porous membranes, ceramics, perforated metal plates, or diffusers in the form of nozzles, and the delivery pipe 7 itself installed on the side of the casing 5 may also have fine pores. It can be configured as an diffuser, and a nozzle or ejector-type diffuser having a very small installation space compared to aeration capacity is preferable.

Referring to the operation of the underwater bubble apparatus provided with the diffuser (43a, 43b), when the micro-bubble is ejected from the diffuser (43a) installed on the water flow inlet 51 side casing (5) through the water flow inlet (51) In the diffuser (43b) is sucked into the inside and diffused horizontally at high speed with the water flow through the aeration water discharge port 51 to rise along the parabolic trajectory, and installed on the side of the aeration water discharge port 52 The microbubble is ejected in a parabolic form by moving to the side by a stream of water jetted at a high speed in the aeration flow outlet 52, so that the time the bubble stays in water can be increased, the aeration capacity and the oxygen transfer rate can be increased .

In particular, it is possible to configure the underwater aeration apparatus omitting the diffuser (4) by making all the necessary abandonment by the diffuser (43a, 43b) is also included in the scope of the present invention.

Figure 2 is a conceptual diagram of the diffuser of various embodiments for the construction of an underwater air purifier according to the present invention.

(A) relates to the diffuser installed in the lower part of the rotary rotor with a rotary blade, the side of the diffuser (4) consists of a perforated plate perforated with a plurality of small pores of small diameter fine air outlet ( 41) is provided. In addition, the side surface of the diffuser may be made of a mesh woven wire [not shown] to form a plurality of fine side air outlets.

(B) is configured to form a circular side air outlet 41 on the side of the diffuser 4, the air outlet 41 may be configured in various ways, such as oval, square or polygonal.

(C) is an embodiment in which a narrow and long slit side air outlet 41 is formed in the vertical direction to the side of the diffuser 4, wherein the slit side air outlet 41 is configured to be in a horizontal or inclined direction. Can be.

In the embodiments of (B) and (C), wherein the side air blowing holes are relatively large, coarse bubbles are ejected to lower the oxygen transfer rate. Thus, the air blowing port 41 of the embodiment (B) is provided with a curved air blowing means 9a to constitute the embodiment of (D), and the shell-shaped blowing air inducing means of the embodiment of (C). (9b) is provided and the Example (E) is comprised.

In the embodiments of (D) and (E), the side air jet port 41 has a curved or shell-shaped jet such as an elbow so that the air jetted from the side air jet port 41 can be more finely dispersed. It is provided with an air guide means (9b), it is installed so as to be in the rear direction in the direction in which the opening of the curved pipe or shell. When the diffuser 4 rotates, water flow at the same speed as the rotational speed is generated at the opening side of the blowing air inducing means 9a and 9b. Negative pressure is formed in the air discharge amount can be increased.

(F) is a cross-sectional view of the embodiment provided with the water flow guide means 10 to concentrate the water flow on the side of the air outlet (41) side.

In order to increase the flow of water passing through the side air blower side, the air flow guide means (9a, 9b) provided in the side air blower (41) is provided with the plate-shaped water flow guide means (10) the side air blower (41) It is installed to be spaced apart from the front of the), the size of the flat plate, the mounting position and the angle is adjusted so that the flow rate and flow rate of the water flow passing through the side air outlet (41) side is increased.

In order to prevent the side air outlets 41 from being closed by the contaminants included in the reaction liquid, a mesh is installed in the lower air outlet and the air inlet of the diffuser 4 to prevent the inflow of contaminants into the inside of the diffuser. It is desirable to.

3 is a conceptual diagram of a second embodiment of the underwater bubble apparatus according to the present invention.

The underwater bubble device according to the present invention is a conventional air bubbler equipped with only the lower air outlet because the side air jet port and the ejection air guide means itself provided on the side of the diffuser can be dispersed by dispersing air into fine bubbles while rotating with the rotor blades Unlike airfoils, quadrilateral rotorcraft and casings for induction are not necessary.

Therefore, the rotor blade 3 in this embodiment is installed on the rotary plate 31 and the rotary plate 31 can be configured as a centrifugal flow type of the structure connected to the drive shaft 2, the drive motor 1 and the rotor blade (3) ) And the cylindrical casing illustrated in the first embodiment by supporting the drive motor 1 by a support 11 composed of about 3 to 4 poles capable of supporting the load of the diffuser 4. Since it is possible to omit the manufacturing cost is more economical and can reduce the stirring force loss by the casing.

In this embodiment as well, as in the first embodiment, the aeration capacity can be increased by installing an air supply pipe (not shown) provided with a diffuser on the lower or side surface of the rotor blade 3.

4 is a conceptual diagram of a third embodiment of the underwater bubble apparatus according to the present invention.

In the underwater bubble apparatus according to the present invention, agitated water flow may be formed by the jet air inducing means and water flow inducing means which protrude and rotate on the surface of the diffuser. Therefore, by separately adjusting the shape and rotational cross-sectional area of the blowing air inducing means 9a. More economical as it can be omitted.

Also in this embodiment, an air supply pipe (not shown) provided with a diffuser is provided on the lower side or the side of the blowoff air inducing means 9a and 9b and the water flow inducing means 10, thereby giving up the aeration capacity as in the first embodiment. Can be increased.

5 is a conceptual diagram of a fourth embodiment of the underwater bubble apparatus according to the present invention.

In this embodiment, the diffuser in the form of a cylindrical or truncated conical container is omitted, and the aeration is made by the diffuser 4 and the microbubbles ejected from the diffuser 4 are diffused by the rotor blades 3.

Referring to the configuration of the underwater bubble apparatus according to this embodiment, the rotary blade (3) is installed on the drive shaft (2) driven by the drive motor (1), the drive motor (1) is a water flow inlet 51 and aeration It is fixedly installed in the cylindrical casing 5 provided with the water flow outlet 52, and the mountain is located in or adjacent to the casing 5 on either or both sides of the water flow inlet 51 and the aeration water discharge port 52. The engines 43A and 43b are provided, and the diffusers 43a and 43b are configured to communicate with the discharge port of the blower by the air supply pipe 7 and the air pipe 6.

Referring to the operation of the underwater bubble apparatus according to this embodiment, the micro-bubbles ejected from the diffuser (43a) installed on the water inlet 51 side is sucked into the casing (5) and the aeration water discharge port 51 ), It is ejected at high speed with water flow and spreads horizontally and floats along the parabolic trajectory, so the residence time is increased and the aeration capacity and oxygen transfer rate can be increased.

In addition, the fine bubbles ejected from the diffuser (43b) installed in the aeration flow outlet 52 is moved to the side by the flow of water ejected at a high speed from the aeration flow discharge port 52 and floated in a parabolic form while underwater Since the residence time is longer, the aeration capacity and oxygen transfer rate can be increased.

It is preferable that the air supply pipe 6 is used as the support and the air supply pipe, and the air supply pipe 7 and the air supply pipe 6 are provided with a detachment device 12 so as to communicate with each other and to be detachable.

In this embodiment, the horizontal flow type by the axial flow type or the four-flow type rotary wing type is illustrated, but the underwater inflow device of the upper inflow lower discharge type or the lower inflow upper discharge type, which has various types of vertical rotational rotor blades such as the four-flow type and the centrifugal flow type, is constructed. It is possible to omit the installation of the casing and install a plurality of acid base pipes equipped with a plurality of diffusers on the periphery, front or rear of the rotor blade to replace the casing to reduce the manufacturing cost and the agitation power is reduced by the casing Can be prevented.

In addition, by connecting the outflow pipe (not shown) provided with a plurality of water discharge outlets to the aeration water discharge outlet 52 and installing a diffuser on the water discharge outlet side, even in a rectangular reactor by a set of rotary blades, the catchment area is not generated evenly. Aeration and agitation can be achieved. In such a configuration, since the head loss due to the outlet pipe is increased, it is preferable to configure the turbine pump of the centrifugal flow type, the cross flow type or the axial flow type by combining the driving motor, the rotor blade and the casing.

6 is a conceptual diagram of a fifth embodiment of the underwater bubble apparatus according to the present invention.

The diffuser in this embodiment is composed of an ejector 8 provided with a primary fluid supply port 81, a secondary fluid supply port 82, a mixed fluid jet port 83, and a nozzle 84. The primary fluid supply port 81 of the ejector 8 is connected to communicate with the air supply pipe 7 and the air supply pipe 6, and the secondary fluid supply port 82 allows the water body in the reaction tank to be sucked in. In communication with the interior of the reaction vessel, the mixed fluid jet port 83 is configured to communicate with the interior of the reaction vessel so that aeration water flows into the reaction vessel.

Referring to the operation of the diffuser by the ejector 8, when the air is forced into the primary fluid supply port 81 by the blower, the water body in the reaction tank is formed by the negative pressure formed around the nozzle 84 inside the ejector. As the air sucked into the ejector 8 through the secondary fluid supply port 82 and the compressed water and the sucked water are mixed and pulverized, fine bubbles are ejected into the reaction tank through the mixed fluid ejection port 83 of the ejector, and the rotor blade 3 By the water flow formed in the) it is diffused to the entire reaction tank and aeration and stirring is made.

The ejector 8 may be configured as a standard type or an annular type without limitation, and the secondary fluid supply port 82 is preferably provided with a net to prevent inflow of contaminants.

In this embodiment, the diffuser 43b on the aeration water discharge port 52 side of the fourth embodiment described above is constituted by the ejector, but the diffuser 43a on the water flow inlet 51 side is also used as the ejector 8. It can be configured, and the diffuser by the ejector 8 can be applied without limitation to the underwater apparatus of the first to third embodiments.

By providing an automatic valve [not shown] in the air pipe 6 of the first to fifth embodiments, the automatic valve is operated by interlocking with a timer, an ORP controller, a DO controller, and a PH controller. The intermittent aeration device which cross-repeats aeration of aeration can be comprised.

When the present invention is applied to an underwater aeration device installed in a wastewater treatment plant, the oxygen transfer rate and aeration power efficiency are improved, and even when installed inclined, a sudden drop in aeration capacity is prevented, and aeration and aeration of aeration are repeated intermittently. The aeration device can be realized, and in particular, the aeration capacity is determined by the capacity of the diffuser and the diffuser, and the stirring capacity is determined by the rotor blade, so that the aeration device combined with the aeration capacity and the stirring capacity that is most suitable for the conditions of the reactor can be realized. .

Claims (13)

A rotor blade is installed in the drive shaft of the drive motor, and a cylindrical or truncated cone-shaped diffuser having a space therein is installed below the rotor blade, and the upper portion of the diffuser is sealed and the lower portion thereof is opened to provide a circular air vent. Is configured, the side of the diffuser is provided with at least one side air outlet, the air inlet is inserted into the end of the air pipe, the air pipe is installed to communicate with the discharge port of the blower, the drive motor is a support Underwater capacity apparatus with improved aeration capacity and diffuser function, characterized in that installed in the casing or the water flow inlet and aeration water discharge outlet is provided. The apparatus of claim 1, wherein the side of the diffuser is a perforated sheet having a plurality of fine side air outlets or a mesh woven of a metal wire. The aeration apparatus according to claim 1, wherein the side of the diffuser is a plate having a circular, oval or polygonal side air outlet. The aeration apparatus according to claim 1, wherein the side of the diffuser is a plate provided with a slit-shaped side air blower which is narrow and elongated in a horizontal, vertical or inclined direction. According to claim 1, Side air ejection port provided in the diffuser installed in the lower portion of the rotor blades are provided with a guide pipe or shell-shaped jet air inducing means characterized in that the aeration capacity and improved diffuser function . According to claim 1, The side air blower provided on the side of the air diffuser installed in the lower portion of the rotor blades is a water repelling device with improved aeration capacity and diffuser function, characterized in that the water flow guide means is provided. According to claim 1, wherein the air pipe is provided with an automatic valve intermittent aeration and aeration aeration function, the aeration device is improved, characterized in that the aeration function and aeration function is improved. According to claim 1, wherein the support or one of the casing on either or both sides of the water flow inlet and the aeration flow outlet is provided with a feed pipe provided with a diffuser, characterized in that the feed pipe is in communication with the feed pipe Underwater thrower with improved aeration capacity and diffuser function. The aeration capacity according to claim 5 or 6, wherein the diffuser is directly connected to a drive shaft of a drive motor, and the jet air inducing means or the water flow inducing means provided in the diffuser has a function of a rotor blade in parallel. Submersible equipment with improved superacid function. According to claim 8, wherein the diffuser is composed of a primary fluid supply port, a secondary fluid supply port, a mixed fluid outlet port and a nozzle, the primary fluid supply port is in communication with the exhaust pipe and the secondary fluid supply port and the The mixed fluid jet is an underwater aerator with improved aeration capacity and diffuser function, characterized in that the ejector is installed to communicate with the water in the reactor. A rotor blade is installed in a drive shaft of a drive motor, and the drive motor is installed in a casing provided with a support or provided with a water flow inlet and a water discharge outlet, and the support or the casing on any one side or both sides of the water flow inlet and the water discharge outlet. An air blower pipe is provided with a diffuser, the air blower pipe is improved in aeration capacity and diffuser function, characterized in that the communication with the discharge port of the blower by the air pipe. 12. The apparatus of claim 11, wherein the diffuser comprises a primary fluid supply port, a secondary fluid supply port, a mixed fluid outlet port, and a nozzle, and the primary fluid supply port communicates with the delivery pipe, The mixed fluid ejection outlet is an aeration apparatus, characterized in that the aeration capacity and the diffuser function is improved, characterized in that the ejector is installed to communicate with the water body in the reaction tank. 12. The method of claim 11, wherein the air supply pipe is provided with an automatic valve is provided with an intermittent aeration function is repeated aeration and aeration agitation, the aeration device with improved aeration capacity and diffuser function.

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