KR200172329Y1 - Apparatus for the aeration of waste water - Google Patents

Abstract

The present invention relates to an underwater aeration type wastewater treatment apparatus installed in the aeration tank containing the wastewater to be treated to supply oxygen to the wastewater.

The aeration type wastewater treatment apparatus of the present invention is equipped with an acid rotor (7) for dividing the air supplied from the outside of the aeration tank (12) into small bubbles at the lower part of the apparatus main body (1), The upper part is provided with an impeller 6 with a streamlined blade 6a which is driven by the drive motor 4 and crushes small bubbles that have exited the diffuser rotor 7 more finely, and the upper part of the impeller 6 is provided. The guide vane (2) for discharging radially strong stirring water stream containing the micro-bubbles passed through the impeller (6) is configured, wherein the diffuser rotor (7) is a plurality of through holes (7a ') in the lower main surface There is a technical feature of the configuration consisting of the upper body (7a) consisting of a cylindrical body of the lower light-sensitive image and the lower body (7b) coupled to the lower portion of the upper body (7a) and provided with a strainer (7b ').

The device of the present invention has the effect of increasing the amount of oxygen dissolved in the wastewater by expanding the gas-liquid contact area and extending the contact time by allowing the air supplied to the wastewater to be finely bubbled to circulate inside the aeration tank.

Description

Aeration Wastewater Treatment System

The present invention relates to an underwater aeration type wastewater treatment apparatus used to treat industrial wastewater or domestic sewage, and more specifically, air flowing from the outside of the aeration tank is finely crushed by an impeller having an acid rotor and a streamlined blade and radially discharged. The present invention relates to an aeration type wastewater treatment apparatus which aims to improve oxygen dissolution rate and increase agitation power by being dispersed in a gas.

Generally, industrial wastewater or domestic sewage discharged from various unit factories, large industrial complexes, or sewage areas containing various pollutants are purified in a complex or at a wastewater treatment plant. In a treatment facility, waste water is usually configured to sequentially remove or purify pollutants while passing through a plurality of treatment tanks. As one of such treatments, wastewater introduced into an aeration tank is supplied from the outside through an aeration device. Through contact with air, the dissolved oxygen is treated.

In the conventional underwater aeration wastewater treatment apparatus used at this time, the air generated from the blower installed outside the aeration tank is introduced into the main body of the underwater aeration apparatus installed in a state of being submerged in the wastewater inside the aeration tank, the air introduced into the aeration device is stirred The rotating operation of the impeller is guided to the radial vane on the upper part and discharges the oxygen in the air into the waste water by making gas-liquid contact with the waste water in the aeration tank.

However, according to the related art, the underwater aeration wastewater treatment apparatus has an impeller configured to have conical blades for conveying air supplied to the lower portion of the apparatus main body to the guide vane side of the upper portion thereof. It has a large power consumption, so it has a disadvantage of high damage to power transmission devices, including the impeller.

In addition, the impeller of the conventional aeration wastewater treatment device merely serves to move the air supplied through the air transfer pipe to the guide vane side of the upper portion together with the wastewater, and the size of the air bubbles discharged through the guide vane is relatively large. Due to the problem that the amount of oxygen dissolved in the wastewater is not large in the process of contact between the air bubble and the wastewater, the restricted area located in the upper part of the aeration tank as the water flow discharged from the guide vanes proceeds horizontally and then goes to the surface of the upper water. Because only the wastewater of is made of gas-liquid contact, there is a disadvantage in that the oxygen dissolved amount per unit air supply amount is low.

The present invention has been devised to solve all the problems of the conventional underwater contact aeration type wastewater treatment device, the air is supplied to the side of the acid rotor mounted on the lower portion of the apparatus body through the air inlet pipe and the air exiting the acid rotor together with the waste water The droplets are crushed into fine bubbles by the impeller with a streamlined blade at the top and directed toward the radial guide vanes, thereby increasing the gas-liquid contact area and increasing the underwater retention time by increasing the surface area of the air bubbles. It is an object of the present invention to provide an aeration type wastewater treatment device that allows oxygen to dissolve in the wastewater.

Another object of the present invention is to configure the impeller of the aeration wastewater treatment device with a streamlined blade to reduce the amount of load and increase the rotational stirring force during its operation, the flow of agitated water that is strongly discharged through the radial guide vanes to the entire aeration tank It is to provide an aeration type wastewater treatment apparatus that can form a convection system that circulates over the region to prolong the time that fine air bubbles stay in the wastewater, while preventing sludge contained in the wastewater from settling to the bottom.

In the device of the present invention, the air supplied from the outside becomes the primary crushing which is finely divided in the process of passing through the acid rotor, and the air bubbles passing through the acid rotor are further in the process of passing through the streamlined blade of the impeller which is rotated again. There is a technical feature to make the fine grinding.

1 is a partial cross-sectional front view showing the structure of the aeration wastewater treatment apparatus of the present invention.

Figure 2 is a cross-sectional view of the aeration tank showing the installation state and the stirring water flow circulation process of the subject innovation device.

((Description of the code for the main part of the drawing))

1. Body 2. Guide vane

4. Drive motor 5. Power train

6. Impeller 6a. Streamlined blades

7. Air rotor 7a. Upper body

7a '. Through air 7b. Lower body

7b '. Strainer 8. Air inlet pipe

12. Aeration tank

Matters relating to the above object and technical configuration of the present invention and the resulting effects thereof will be clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, Figure 1 is a partial cross-sectional front view showing the overall structure of an embodiment aeration type wastewater treatment apparatus of the present invention.

As shown, the aeration wastewater treatment apparatus of the present invention, the main body 1 is provided with a radial guide vane 2 at the top, and the drive motor 4 mounted to the center of the upper plate 3 of the main body 1 ), A power transmission device 5 composed of a plurality of reduction gear trains connected to the motor shaft of the drive motor 4, an impeller 6 that is rotated by receiving power from the power transmission device 5, and an impeller ( 6 and the air inlet pipe 8 and the main body 1 in which an end portion is positioned directly under the air rotor 7 and the main body 1 are kept upright on the bottom of the aeration tank. It consists of a fixed column (9).

At this time, the guide vanes (2) is a plurality of supports installed at equal intervals in the outer space between the lower plate (2a) and the upper plate (3) and these plates (2a, 3) forming a downward inclined surface toward the inside It consists of liver 2b.

In addition, the impeller 6 coupled to the shaft boss 5a of the power transmission device 5 has a plurality of streamlined blades 6a, wherein the streamlined blades 6a have a front end in the rotational direction thereof. Thinner and thicker toward the rear side, the shape is thicker like a blade.

On the other hand, the diffuser rotor 7 is formed in the cone shape of the lower light image, and is coupled to the upper body (7a) formed with a plurality of through holes (7a ') in the lower peripheral surface, the lower portion of the upper body (7a) It consists of a lower body 7b provided with a strainer 7b '.

In FIG. 1, reference numeral 10 denotes a bracket for coupling the fixing column 9 to the main body 1.

Next, Figure 2 is a cross-sectional view of the aeration tank showing the installation state of the device and the circulation of the stirring water flow, as shown, the device of the present invention is underwater in the aeration tank 12 filled with the wastewater 11 to be treated In the installation on the bottom surface, the upper part is guided to the fixed column 9 protruding above the water surface of the waste water, and the power cable 13 from the outside is connected to the driving motor 4 in the water, and in the water of the aeration tank 12. The other end of the air inlet pipe 8, one end of which is located below the installed apparatus main body 1, has a structure that is connected to the blower 14 provided outside the aeration tank 12. Reference numeral 15 in FIG. 2 denotes a hanger for lifting or carrying the apparatus main body 1.

Looking at the operation of the present invention aerated wastewater treatment apparatus having such a structure based on Figures 1 and 2 as follows.

First, the air generated by the blower 14 installed outside the aeration tank 12 is guided to the air inlet pipe 8 and supplied to the lower part of the apparatus main body 1 installed in the water of the aeration tank 12, and the apparatus main body ( The air supplied to the lower part of 1) is sucked into the inside of the mountain rotor 7 located at the upper part thereof and exits the through hole 7a 'formed on the main surface of the upper body 7a of the mountain rotor 7. At this time, the air passing through the acid rotor 7 flows together with the surrounding wastewater, and foreign matter contained in the wastewater passing through the acid rotor 7 is trapped 7b provided on the lower body 7b. Removed by '). In addition, the size of the air bubbles passing through the diffuser rotor 7 is significantly reduced in the course of passing through the through hole 7a '.

Subsequently, the finely divided air bubbles passing through the diffuser rotor 7 are more finely crushed while passing through the rotating impeller 6 installed thereon. In other words, the air bubbles buried in the streamlined blade 6a of the impeller 6 are crushed finely during contact with the front surface of the blade like a blade, so that the air bubbles passing through the impeller 6 have a fine bubble shape. Get drunk.

Next, the fine bubbles passing through the impeller 6 are guided to the guide vanes 2 on the upper side thereof and are discharged radially around the apparatus main body 1. Arrows in FIG. 1 indicate the flow of air bubbles.

On the other hand, the water flow including the fine bubbles discharged radially through the vanes 2 of the apparatus main body 1 has a strong flow rate and moves toward the side wall of the aeration tank 12 as shown in FIG. As shown in the figure, the circulating water flows back to the lower part of the apparatus main body 1 on the side wall and the bottom surface. In other words, the microbubble-containing wastewater discharged from the apparatus main body 1 with a strong force circulates through the entire area of the aeration tank 12, and as a result, almost all the wastewater inside the aeration tank 12 comes into contact with the microbubbles.

As described above, in the aeration type wastewater treatment device of the present invention, the air supplied to the main body of the device is converted into fine bubbles by the impeller 6 having the air rotor 7 and the streamlined blade 6a, thereby aeration tank 12 The amount of oxygen dissolved in the wastewater is greatly increased compared to the conventional apparatus by discharging the wastewater into the wastewater and expanding the gas-liquid contact surface and increasing the water remaining time of the bubbles.

In addition, in the aeration type wastewater treatment device of the present invention, the impeller 6 is formed of a streamlined blade 6a, so that the resistance is reduced during rotational operation as compared with the conventional conical blade, and discharged through the guide vane as the stirring force is increased. The convection action of the circulating water flow improves the overall oxygen dissolving ability and prevents sedimentation of sludge contained in the wastewater, and also improves the durability of the power transmission device 5 including the impeller 6.

Claims (2)

In the aeration type wastewater treatment apparatus installed in the water of the aeration tank in which the wastewater is accommodated, an acid rotor (7) is provided at the lower part of the apparatus main body (1) for dividing the air supplied from the outside of the aeration tank (12) into small bubbles. The upper part of the diffuser rotor 7 is provided with an impeller 6 having a streamlined blade 6a which is rotated and driven by the drive motor 4 and finely pulverizes the small bubbles exiting the diffuser rotor 7. And, the upper part of the impeller (6), aeration type wastewater treatment apparatus, characterized in that the guide vanes (2) for discharging radially strong stirring water flow containing the micro-bubbles passed through the impeller (6) is provided. The upper rotor 7a of claim 1, wherein the diffuser rotor 7 is coupled to a lower part of the upper part 7a and a lower part of the upper body 7a. Aeration type wastewater treatment apparatus, characterized in that consisting of a lower body (7b) provided with a strainer (7b ').