KR20070017429A - Submersible Aerator and Mixer with the Increased Aeration Capacity and Stability - Google Patents

Abstract

The present invention relates to an underwater aeration device having a stirring function for agitating a water body and an aeration function for supplying oxygen in water, wherein a rotor blade is installed on a rotating shaft of a drive motor, and air supplied from a blower is used to generate water in the rotor blade. An diffuser having an diffuser is installed on one or both sides of the rotary shaft so that the diffuser can be diffused, and the diffuser communicates with the discharge port of the blower through an air supply pipe, and the driving motor is connected to the underwater aeration apparatus installed in the casing. Wherein the acid cylinder is installed so as to be separated from the rotating shaft is fixed aeration efficiency and mechanical failure is reduced;

The casing 4 is composed of two layers of skin to form a space in which air can be communicated. At least one of the two layers of skins is provided with an diffuser 4 or an air pore 15 is provided. The casing itself is further provided with a diffuser function can be increased aeration capacity.

Aeration device, acid container

Description

Submersible Aerator and Mixer with the Increased Aeration Capacity and Stability}

1 is a conceptual diagram of a first embodiment of an underwater aeration apparatus according to the present invention,

2 is a conceptual diagram of an acid cylinder for underwater aeration apparatus according to the present invention,

3 is a conceptual view of the diffuser configured in the diffuser for underwater aeration device according to the present invention,

4 is a conceptual diagram of a second embodiment of an underwater aeration apparatus according to the present invention;

5 is a conceptual diagram of a third embodiment of an underwater aeration apparatus according to the present invention;

6 is a conceptual diagram of a fourth embodiment of an underwater aeration apparatus according to the present invention.

* Explanation of symbols for main parts of drawings *

1: drive motor 2: rotor blade

3,3a to 3e: acid cylinder 4: acid engine

5: casing 6: double casing

7 water flow inlet 8 aeration water discharge port

9,9a: Delivery pipe 10: Delivery pipe

11: removable device 12, 12a: air control valve

13,13a: Automatic valve 14: Diffusion mechanism

15: acid pores 16: expansion vane

17: protruded diffuser 18: stepped diffuser

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater aeration device for increasing dissolved oxygen concentration used in aquaculture and sewage treatment, and includes an acid diffusion function and a mixing function, which are installed in water and pumped in a blower. The air may be dispersed in small bubbles to perform the function of giving up and stirring the reaction solution.

Referring to the configuration of the conventional method for underwater crawler, a rotary blade is installed on the rotary shaft of the three-dimensional drive motor, the lower portion of the rotary blade is connected to be installed so as to be integral with the rotary shaft to rotate together with the rotary shaft. The upper and side surfaces of the gas cylinder are sealed, and a circular opening is formed at the lower part of the gas cylinder in which the air pipe is inserted, and the end of the air pipe which is in communication with the discharge port of the blower is interpolated and installed at the lower opening of the air cylinder. The rotor blades and the air cylinders were configured such that the driving motor was fixedly installed on the upper portion of the casing so as to operate inside the casing provided with the water inlet and the water outlet.

Referring to the operation of the conventional hydrofoil, the water flow generated by the rotation of the rotor blades flows radially through the space between the casing and the acid cylinder, and small coarse bubbles are discharged from the periphery of the opening that is circularly open at the bottom of the acid cylinder. Dispersion in bubbles and aeration and agitation are made, so the following problems are pointed out in efficiency, capacity and stability.

① Since the acid cylinder rotates with the rotor blades, the initial maneuvering force is greatly increased due to the increase in the rotational weight, defects such as shear failure of bolts are generated at the connection between the rotor blades and the cylinder, and power is wasted.

② Because the size of the rotor blade for forming the water flow and the power of the driving motor must be increased in proportion to the amount of air flow, the reactor capacity is small and the DO demand is large, that is, the amount of air is high and the stirring force is relatively small. In the reaction tank, supply of excessive stirring power is inevitable compared to the amount of air supplied. Therefore, the microbial floc is dismantled, the sedimentation is lowered, and there is a problem of power waste due to excessive stirring.

In addition, if the size of the rotor blades and the agitation power are reduced to the reactor capacity, a large part of the air volume cannot be finely dispersed and rises as coarse bubbles, so that the gas-liquid contact is not properly made and the oxygen transfer rate is sharply lowered to satisfy the aeration capacity. It becomes impossible.

③ Patent No. 10-0583052, which is designed to improve the above problems, has a problem in that acid cylinders formed with a plurality of pores rotate together with the rotor blades, thereby increasing resistance to the reaction solution and wasting power.

④ In Korean Patent Publication No. 10-2006-0111429, there is a problem that the diffuser is installed in the lower part of the rotor blade so that fine air bubbles are generated, so that if the amount of air is increased, the over-supplied air bubbles flow back to the inlet side of the casing due to buoyancy.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the object of the present invention is to provide an underwater aeration apparatus, in which the first stability is improved and the second aeration capacity is increased.

In order to achieve the first object described above, in the present invention, a rotary blade is installed in the rotary shaft of the drive motor, and the drive motor is installed in a casing provided with a water flow inlet and an aeration water discharge port, and the bubbles ejected from the center of the rotor are An air cylinder formed with one or more diffusers is fixedly installed separately from the rotary blades in the central portion of one or both of the rotary shafts for driving the rotary blades to be radially diffused by the water flow generated from the rotary blades. The air is communicated with the discharge port of the blower by the air blower, so that the stability is improved.

In addition, the acid cylinder installed in the center of the water flow generated from the rotor blades is composed of a variety of shapes formed by selecting from the cylindrical, hemispherical, conical, truncated cone, the through-cylinder formed in the center according to the aeration capacity and the conditions of the reactor. In order to extend the lower side, a vane having an enlarged shape is attached or a protruding diffuser having a diffuser projecting toward the aeration flow outlet of the casing.

In order to achieve the second object, in the present invention, an air supply pipe having an outer diffuser formed with acid pores is additionally installed at one side or both sides of the water flow inlet and the aeration water discharge port, and the air supply pipe is the The aeration system was realized by aeration in the center of the water stream by communicating with the air supply pipe or the acid cylinder, and the aeration of the aeration pipe was added at the periphery of the water stream so that the aeration capacity was further increased.

In order to increase the capacity of the aeration device, in the present invention, by installing a pipe-shaped vane, a protruding diffuser, a stepped diffuser, and the like, the air diffuser is blown out from the diffuser to the aeration flow outlet. The discharge port of the diffuser and the casing were configured to be close to each other. Accordingly, even when the air ejected from the diffuser is shortened in the casing and is rapidly discharged out of the casing, the air flows back to the rotor blade side due to buoyancy and floats to the inlet side of the casing due to buoyancy. The problem of aeration is improved and the aeration performance and capacity are increased.

In addition, in order to increase the capacity of the aeration device in the present invention, the casing is a double casing is composed of two layers of skin, the space there is a space for air communication therein, at least one of the two skins of the skin More than one diffuser is installed, or at least one diffuser is formed, and the diffuser or assembly unit such as a blower tube is omitted by allowing the diffuser to communicate with the discharge port of the blower via the inner space of the double casing and the blower. The simple configuration of the device reduces defects and improves economic efficiency.

The double casing and the diffuser installed in the air inlet pipe can be applied without limitation to a diffuser such as a porous membrane, a porous ceramic, a perforated metal plate, or a nozzle type, and the fine pipe is installed in the side of the casing. Pores can be formed to form a diffuser in the form of a pipe.

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

1 is a conceptual diagram of a first embodiment of an underwater aeration apparatus according to the present invention.

Referring to the arrangement of the first embodiment of the underwater aeration device according to the present invention, a rotary blade (2) is provided on the rotary shaft of the drive motor (1), and bubbles blown from the center of the rotary blades are generated in the water flow generated by the rotary blades. A diffuser cylinder 3 is installed at the central portion of the rotor blade so as to be diffused therefrom so as to be separated and fixed to the rotary shaft, and the diffuser communicates with a discharge port of a blower (not shown) through an air intake pipe 9. The drive motor is configured to be installed in the casing 5 provided with the water flow inlet 7 and the aeration water discharge port 8.

As such, the diffuser cylinder 3 is installed at the center of the rotor blade separately from the rotary shaft, so that the diffuser is directly connected to the rotary shaft, and thus, power consumption is reduced and mechanical defects can be reduced.

The acid cylinder 3 has an upper and side surfaces of the airtight container and a space in which air can be communicated therein, and a lower part of the acid cylinder 3 is formed in an open container. A slit-shaped diffuser 14 is formed along the circumference of the side circumference, and the tube end of the air supply pipe 9 is inserted into the lower opening of the diffuser cylinder.

2 is a conceptual diagram of an acid cylinder for underwater aeration apparatus according to the present invention.

1 illustrates a cross-section of a truncated cone-shaped acid cylinder, but the acid cylinder may be configured without limitation by selecting from various shapes such as a cylindrical shape (3a), a hemispherical shape (3b), a cone shape (3c), a truncated cone shape (3d), and the like. have.

3 is a conceptual view of the diffuser configured in the diffuser for underwater aeration device according to the present invention.

In this embodiment, by installing a pipe-shaped vane, a protruding diffuser, a stepped diffuser and the like on the lower side of the diffuser of the various types illustrated in FIG. By extending to the (8) side, bubbles can be quickly discharged through the discharge port of the casing. Therefore, even when the air flow blown out from the diffuser 14 is shortened in the casing 5 and 6 and the air flow rate is increased as the air is rapidly discharged out of the casing, the air bubbles are bubbled toward the rotor blade 2 by buoyancy of the bubble. The problem of reversing and rising to the inlet 7 side of the casing can be improved.

(3A) is an embodiment in which an expandable vane 16 is attached to the acid cylinder 3 so that the circumference of the lower side is long, so that the slit-shaped diffuser is also long and approaches the outlet side of the casing. (3B) is an embodiment in which the protruding diffuser 17, in which the diffuser protrudes, is attached to the casing 3 in the diffuser 3 on the casing outlet side. 3C is an embodiment in which the stepped diffuser 18 is formed by increasing the width of the slit diffuser in the diffuser 3 on the casing outlet side. (3D) relates to an embodiment in which the stepped diffuser 17 is provided in the expandable vane 16 of the diffuser 3 to which the expandable vane 16 is attached. A protruding diffuser may also be installed in the expansion vane.

(3E) and (3F) implement an additional air hole 15 in the expandable vane 16 and the protruding diffuser 17 to increase the amount of bubble blown to the outlet side of the casing to increase the aeration capacity. It is about an example.

In the above (3A) to (3F), the acid cylinder (3) is shown as a truncated cone (3d), but not limited to the cylindrical acid cylinder (3a), hemispherical acid cylinder (3b), illustrated in FIG. In the cylinder 3c or the like, the expandable vane 16, the protruding diffuser 17, and the stepped diffuser 18 can be configured without limitation.

4 is a conceptual diagram of a second embodiment of an underwater aeration apparatus according to the present invention.

In this embodiment, an air inlet pipe having an air diffuser 4 is provided in the casing 5 on either or both sides of the water inlet 7 and the aeration water outlet 8 of the underwater aeration apparatus according to the first embodiment. 10) is additionally installed and the delivery pipe is configured to communicate with the delivery pipe (9) and the diffuser (4).

By using the water flow generated in the rotor blade 2 and ejected to the outer side of the casing, the bubble generated in the diffuser 4 can be diffused into the reaction tank, so that the aeration capacity can be increased in the first embodiment.

In this embodiment, although the delivery pipe is directly connected to the delivery pipe and provided with a detachment device 11 for maintenance, the attachment device can be omitted by connecting the delivery pipe so as to communicate with the acid cylinder. This is also included in the scope of the present invention.

5 is a conceptual diagram of a third embodiment of an underwater aeration apparatus according to the present invention.

In this embodiment, the casing is a double casing (6) formed of two layers of skin to allow air to communicate therein, and a plurality of acid pores (15) are formed in at least one of the two layers of skins. Thus, the casing itself can be configured as an diffuser.

At least one of the two layers of skins is a membrane diffuser having a very high oxygen transfer rate by installing a flexible membrane such as a rubber plate, PEM, etc., in which micropores are formed in a form in which a net, a perforated plate, or air can communicate. Can be configured.

In addition, one or more diffusers 4 are installed in at least one of the two skins, and the internal space of the diffuser is blown through the internal space of the double casing 6 and the air blower 9. The aeration capacity can be increased by the configuration in communication with each other.

In addition, the inner skin of the double casing 6 forms a narrow and long slit diffuser [not shown] along the circumference of the casing, so that the diffuser cylinder 3 is formed by the slit type diffuser provided in the inner skin of the double casing. It can also replace

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

In this embodiment, a narrow and long slit diffuser 14 is formed in an annular shape along the inner circumference of the penetrating cylindrical acid cylinder 3e, through which a through portion through which aeration flow can flow is opened. .

The through cylindrical diffuser (3e) is installed in the casing provided with a water flow inlet and aeration discharge outlet, or one side of the through cylindrical diffuser (3e) is a water flow inlet (7), the other side is a waste water discharge outlet ( 8) the through cylindrical diffuser 3e itself may perform the function of the casing. In addition, the inlet and outlet side of the through-cylinder acid cylinder can be installed in the water flow guide means, such as cone-shaped, tubular, so that the inflow and discharge of water flow can be made smoothly.

The aeration capacity 15 may be further configured in the through-type diffuser 3e to increase aeration capacity.

In the underwater aeration device according to the fourth embodiment, since the aeration flow is ejected horizontally and bubbles rise along the trajectory in the form of a parabola, the contact between the reaction liquid and the bubbles is increased, so that the aeration capacity and the oxygen transfer rate can be increased. Rotating blades are illustrated, but the present invention is not limited thereto, and may be configured in a granular shape. In addition, the aeration device of the first to third embodiments exemplified by the rotary rotor blade can also be configured in the horizontal axis type as in the fourth embodiment.

The airflow valves 9 and 9a of the first to fourth embodiments according to the present invention may be provided with air control valves 12 and 12a to adjust the air volume. In addition, by installing the automatic valve (13, 13a), and by operating the automatic valve in conjunction with the timer, redox potential controller, dissolved oxygen concentration controller, pH controller, etc. to repeat the aeration, aeration aeration or aeration and aeration aeration The intermittent aeration device can be configured.

When the present invention is applied to an underwater aeration device installed in a sewage treatment plant, the oxygen transfer rate and the aeration power efficiency are improved, and the occurrence of defects is reduced, the initial starting power is small, and even when installed obliquely, Since the fall is prevented, the stability is increased, and the intermittent aeration device in which the aeration and the aeration of the aeration are repeated can be easily realized, and the underwater aeration device in which the aeration capacity and the stirring capacity are most suitable for the conditions of the reaction tank can be realized.

Claims (6)

A rotary blade 2 is installed at the rotary shaft of the drive motor 1, and an acid cylinder 3 having at least one diffuser 14 is installed at the rotary blade to be fixed separately from the rotary shaft. 3a), hemispherical shape (3b), conical shape (3c), truncated cone shape (3d) and through cylindrical shape (3e) is selected from the container form, the acid cylinder is to communicate with the discharge port of the blower through the exhaust pipe (9) Underwater capacity device with improved aeration capacity and stability. The method of claim 1, wherein at least one of the expansion vane 16, the protruding diffuser 17, and the stepped diffuser 18 is provided on the lower side of the diffuser 3. Underwater Aeration System with Improved Capacity and Stability According to claim 1, wherein the acid cylinder (3) is one or more acid pores (15) is characterized in that the aeration capacity and stability improved underwater aeration device, characterized in that According to claim 1, wherein the drive motor (1) is installed in a casing (5) provided with a water flow inlet (7) and aeration flow outlet (8), the casing (5) is provided with a diffuser (4) An aeration pipe (10) is installed, the aeration pipe is an underwater aeration device with improved aeration capacity and stability, characterized in that in communication with the air pipe (9) or the acid cylinder (3). According to claim 1, wherein the drive motor (1) is composed of two layers of skin is installed in the double casing (6) formed a space for communicating air therein, the double casing constituting the double casing (6) At least one of the skin at least one of the one or more diffuser (4) and a plurality of acid pores (15) is characterized in that the aeration capacity and stability improved underwater aeration device, characterized in that configured. The air supply pipes (9, 9a) according to claim 1, wherein the air supply pipe (9, 9a) has a timer, so as to operate by selecting from aeration or non-aeration agitation, or to operate with an intermittent aeration that is repeatedly repeated at a set cycle An aeration device with improved aeration capacity and stability, characterized in that an automatic valve (13, 13a) that operates in conjunction with dissolved oxygen concentration controller, redox potential controller, and the like is installed.

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