KR101052246B1 - A aerator for advanced wastewater treatment using it - Google Patents

Abstract

PURPOSE: An aerator and an apparatus for disposing sewage and waste water are provided to secure the smooth discharge of air by preventing the deposition of impurities on the inner side of a hollow shaft. CONSTITUTION: An aerator is composed of a motor(2), a hollow shaft(3), an opening valve(5), a spiral shaped wing(4), a casing(1), and a guiding part(8). The hollow shaft rotates with the motor. The opening valve is arranged at the upper side of the hollow shaft. The spiral shaped wing is formed at the outer circumference of the hollow shaft. The casing contains the motor, the hollow shaft, and the opening valve. A part of the casing, in which the spiral shaped wing is formed, is exposed. The guiding part is in connection with the lower side of the casing using a plurality of connecting parts. A plurality of guiding holes is formed in the guiding part.

Description

Aerator and Advanced Wastewater Treatment Using It

The present invention relates to an aeration device used in a sewage and wastewater treatment plant and a sewage and wastewater treatment device using the same, which will be described in more detail so as to enable uniform aeration throughout the aeration tank regardless of the depth of the aeration tank. Wastewater from the aeration tank flows into the hollow shaft and foreign matter is deposited inside the hollow shaft, thereby preventing the reduction of air discharge through the hollow shaft, and by using these aerators, the aerobic and anoxic states It relates to a sewage and wastewater treatment device that can be adjusted according to the inflow load.

In general, domestic sewage and factory wastewater discharged from homes and factories go through sewage and wastewater treatment plants before being discharged into rivers and rivers.In such wastewater treatment plants, aeration tanks supply oxygen to sewage and wastewater that enters aeration tanks. By activating the microorganisms in the sewage and wastewater by stirring, various organic substances contained in the sewage and wastewater are removed to go through the process of purifying sewage and wastewater.

In other words, by aeration of air into the aeration tank, the aerobic action of aerobic bacteria is activated by increasing the dissolved oxygen in the wastewater, and the aeration function is used to purify the wastewater. At the same time, the wastewater is stirred to discharge nitrogen from the wastewater. It is to treat sewage and wastewater through the action.

In this process, the aeration or agitating action is performed in the aeration tank through various aeration devices. An example of the aeration device is illustrated in FIGS. 1 and 2.

This aeration device is formed on the hollow shaft (3) exposed to the lower end of the casing (1) after the inclined installation so that the lower portion of the casing (1) in the aeration tank (P) in which the waste water flows into and stored. By rotating the spiral blades 4 to agitate the waste and waste water, the air is sucked through the inlet 32 formed in the upper part of the casing 1 to discharge nitrogen from the waste and waste water, or through the hollow shaft 3. At the same time to discharge to the waste water and to form a vortex through the rotation of the spiral blade (4) to aeration by dissolving air in the vortex.

As shown in FIG. 2, the aeration device is provided with an inlet 32 through which air flows into the upper end of the casing 1, and prevents vortices from being scattered on the outer periphery of the casing 1. The plate 6 is formed and the support 7 is installed, the motor 2 is configured inside the casing 1, and the hollow shaft 3 and the hollow shaft 3 interlocked with the motor 2 are formed. Spiral blade (4) is formed at the lower end of the), the opening and closing valve (5) for opening and closing the hollow shaft (3) in conjunction with the hollow shaft (3) is formed on the upper portion of the casing (1).

The aeration device according to this configuration is not shown in the drawings, but as the motor 2 rotates by turning on the switch, the hollow shaft 3 interlocking with the motor 2 rotates, and the hollow shaft 3 rotates. As the spiral blade (4) is rotated in the waste water waste water will be stirred by stirring the waste water.

In addition, in the case of performing the aeration, the exhaust valve at the end of the hollow shaft 3 is rotated by the rotation of the spiral blade 4 as the opening and closing valve 5 is opened while the spiral blade 4 is rotating as described above. A negative pressure is formed at the 31, and air is introduced through the inlet 32 of the upper end of the casing 1 and discharged through the hollow shaft 3 to the exhaust port 31 as the pressure difference is induced.

However, in performing the aeration action, the vortex formed by the rotation of the spiral blades 4 is not induced to the bottom of the aeration tank P as air is dissolved, and is led to the upper portion of the aeration tank P, thereby aeration tank P There is a problem that the entire aeration can not occur.

In addition, when the aeration device performs the stirring action, the wastewater flows into the hollow shaft 3, and the wastewater thus introduced deposits foreign substances on the inner circumference of the hollow shaft 3 as time passes. When the aeration is performed, the action of the discharged air is hindered.

Thus, the problem that the aeration device cannot perform uniform aeration throughout the aeration tank P and obstruct the action of the discharged air is a problem of lowering the purification efficiency of the wastewater.

Accordingly, the present invention has been made to solve the problems caused by the prior art, it is possible to uniform aeration throughout the aeration tank and at the same time it can prevent the foreign matter is deposited inside the hollow shaft to prevent the discharge of air It is to provide an aeration device, and to provide a sewage and wastewater treatment device using the same.

In order to solve the above technical problem, the aeration device of the present invention includes a motor, a hollow shaft that rotates in conjunction with the motor, an open / close valve on the top of the hollow shaft, a spiral wing formed on the outer periphery of the hollow shaft, and the inside, An accommodation space is formed in the housing to accommodate the motor, the hollow shaft, the on-off valve, and the casing is formed so that the spiral wing portion is exposed to the lower end of the hollow shaft, connected by at least one connecting portion at the bottom of the casing and the spiral wing Characterized in that it consists of a guide portion is formed in the tubular induction pipe in the lower portion.

Wherein the guide portion is formed by a plurality of induction holes, the induction pipe is characterized in that formed in the lower portion of the spiral blade than the diameter of the spiral blade.

More preferably, the inner circumference of the induction pipe is formed so that the spiral guide groove is formed so that the vortex guided to the induction pipe is easily eluted to the bottom.

In addition, the connecting portion may be configured to be foldable so that the induction pipe may be configured to surround the spiral wing while wrapping the lower portion of the casing when the connecting portion is bent.

In addition, the guide tube is configured to be detachable to the casing can be used by detaching the guide tube according to the depth of the aeration tank.

Meanwhile, at least one discharge hole is formed at the lower end of the hollow shaft to prevent foreign matter from being deposited on the inner circumference of the hollow shaft.

More preferably, the discharge hole is formed at the lower end of the hollow shaft, it is reasonable to be formed in the portion where the spiral blade and the hollow shaft contact.

Meanwhile, the present invention provides a sewage and wastewater treatment apparatus using the aeration apparatus, wherein the apparatus is an oxidizer reaction tank into which sewage and wastewater are introduced, an aeration apparatus mounted to perform an aeration or agitation in the oxidization reactor, and the aeration apparatus. Control means for controlling the operation of, the inlet pipe connected to one side of the oxidizing sphere reaction tank to introduce the waste water, the effluent pipe is installed on one side of the oxidizing sphere reactor to discharge the treated water, the activated sludge discharged from the effluent pipe A settling tank for precipitating the mixed solution, a return sludge pipe which provides a path for the sludge precipitated in the settling tank to be returned to the oxidizing sphere reaction tank, an excess sludge pipe for directly drawing and transporting the activated sludge mixed solution from the oxidizing sphere reaction tank, and the excess sludge pipe Dewatering to dewater the sludge conveyed through And it characterized by including a configured.

The aeration device of the present invention has the advantage of enabling a uniform aeration action in the aeration tank according to the depth of the aeration tank based on the action of the guide portion.

In addition, the aeration device of the present invention has the advantage that it is possible to prevent the air discharge amount is reduced due to foreign matter deposition in the inside of the hollow shaft by flowing out the waste water introduced into the hollow shaft during the stirring process. .

In addition, the sewage and wastewater treatment apparatus using the aeration device of the present invention can adjust the time ratio of the aerobic and anoxic state required for nitrification and denitrification according to the fluctuation of inflow load of sewage and wastewater, and directly withdraw the excess sludge in the oxidizer reactor By the dehydration treatment there is an advantage that can be easily controlled ASRT.

1 is a schematic diagram showing a state of use of the conventional aeration device,
2 is a side cross-sectional view showing the structure of a conventional aeration device,
3 is a side sectional view showing the structure of the aeration apparatus of the present invention,
4 is a perspective view showing a guide unit which is one configuration of the present invention;
5 is a perspective view showing a spiral wing, a hollow shaft and a discharge hole of one configuration of the present invention,
6A and 6B are schematic diagrams showing a state of use of the present invention.
7 is a schematic view showing the wastewater and wastewater treatment apparatus using the aeration apparatus of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Figure 3 is a side cross-sectional view showing the structure of the aeration apparatus of the present invention, Figure 4 is a perspective view showing a guide portion of one configuration of the present invention, Figure 5 is a spiral wing, hollow shaft and discharge hole of one configuration of the present invention. 6A and 6B are diagrams showing a state of use of the present invention, and FIG. 7 is a schematic diagram of a wastewater and wastewater treatment apparatus using the aeration apparatus of the present invention.

In the aeration apparatus of the present invention, as shown in FIG. 3, a motor 2 is formed inside the casing 1, a hollow shaft 3 interlocking with the motor 2 is formed, and the hollow shaft ( A spiral wing 4 is formed at a portion protruding to the outside of the casing 1 to the lower end of 3), and the open / close valve 5 is configured to communicate with the upper end of the hollow shaft 3. In addition, the vortex preventing plate 6 is configured at the lower end of the outer periphery of the casing 1, and the support frame 7 is configured at the outer periphery of the casing 1 is the same as the conventional technology mentioned above.

In particular, in the present invention, the guide part 8 is formed at the lower end of the casing 1, and the guide part 8 is formed on the spiral blade 4 which is integrally connected thereto by the rotation of the hollow shaft 3. Vortex formed by the air and the air discharged from the exhaust port 31 of the lower end of the hollow shaft (3) to be dissolved in the vortex to be guided to the bottom while mixing with each other so that the aeration uniformly throughout the aeration tank.

When the configuration of the guide portion 8 is described in detail, it is composed of at least one connecting portion 81 connected to the lower end of the casing 1 and an induction pipe 83 integrally formed with the connecting portion 81, FIG. As shown in FIG. 3, the connecting portion 81 forms an inclined gradient so as to have a larger diameter in the casing 1, and a plurality of connecting portions 81 are formed, and the induction hole 82 is formed between the connecting portions 81. As the blade 4 rotates, water in the aeration tank is guided through the guide hole 82 to form a vortex in the downward direction by the rotation of the spiral blade 4.

The lower end of the connecting portion 81 is formed with a tubular induction pipe 83, the downward vortex aerated by the induction pipe 83 is guided downward by the induction pipe 83 in the aeration tank will be. In this way, the downward vortex is guided downward by the induction pipe 83 so that the aeration can be uniformly aerated throughout the aeration tank. The guide tube 83 is preferably formed larger than the diameter formed by the spiral blade 4 in the lower portion of the spiral blade (4).

More preferably, the inner circumference of the induction pipe 83 is formed so that the spiral guide groove 84 is formed so that the vortex guided to the induction pipe 83 is easily eluted downward.

As shown in FIG. 4, the guide part 8 has an insertion part 85 formed at an upper end of the connection part 81 so as to be detachable from the casing 1. It can be configured to be detachable from the casing (1) by inserting the lower end of 1) by the interference fit method.

In addition, it is reasonable that the connecting portion 81 is configured to be bent, by bending the connecting portion 81 so that the connecting portion 81 is positioned below the casing 1 and the induction pipe 83 is The lower end of the induction pipe 83 may surround the spiral blade 4 while the induction pipe 83 surrounds the lower portion of the casing 1 by being positioned at the lower outer periphery of the casing 1. The bending of the connecting portion 81 separates the guide portion 8 from the casing 1 when uniform aeration is possible without requiring the guide tube 83 when the depth of the aeration tank P is small. The guide pipe 83 is located at the lower outer periphery of the casing 1 by simple bending, and the lower end of the guide pipe 83 surrounds the spiral wing 4 to prevent separate vortex. It is to prevent the scattering by the lower end of the induction pipe 83 without installing the plate (6).

In order to bend the connection portion 81, the material of the guide portion 8 is appropriate to use an elastic rubber material, etc., the insertion portion 85 and the upper and lower ends of the connection portion 81 It is reasonable to bend the connection portion 81 by constituting a bending groove 81-1 in a portion in contact with the induction pipe 83.

In addition, although not shown in the drawings, the aeration device of the present invention is a manual operation method of operating the aeration device by the user selects the agitation or aeration action according to the waste water waste state of the aeration tank and the BOD (Biochemical) of the waste water stored in the aeration tank The controller is configured to form an automatic measuring circuit and a known measuring sensor for measuring Oxygen Demand (MIX) and Mixed Liquor Suspended Solids (MLSS) values, and to automatically control the agitation or aeration by receiving a control signal from the sensor. Can be configured.

Meanwhile, in the present invention, at least one discharge hole 9 is formed at the lower end of the hollow shaft 3 so that the waste water in the case of only stirring the spiral blade 4 without discharging the air to the exhaust port 31. It is introduced into the hollow shaft (3) to prevent the accumulation of foreign matters and the like. That is, the waste water introduced into the hollow shaft 3 is discharged to the outside as the hollow shaft 3 is rotated by the discharge hole 9.

More preferably, the discharge hole 9 is formed at the lower end of the hollow shaft 3, it is reasonable to be formed in the contact portion of the spiral blade 4 and the hollow shaft (3). In more detail, as shown in FIG. 5, it is reasonable that the discharge hole 9 is formed at a portion where the rear surface 42 and the hollow shaft 3 of the spiral wing 4 are in contact with each other. This means that as the hollow shaft 3 rotates counterclockwise in the figure, the surface in contact with the wastewater in the spiral blade 4 will correspond to the front face 41 and the reverse side will correspond to the rear face 42. By this configuration, the wastewater introduced into the hollow shaft 3 can be discharged through the discharge hole 9 formed at a portion where the rear blade 42 and the hollow shaft 3 are in contact with the spiral blade 4. It is. That is, the discharge hole 9 is formed in the rear surface 42 of the spiral wing 4 in which the negative pressure is formed so that the wastewater introduced into the hollow shaft 3 by the pressure difference flows outward.

Hereinafter, the operating state of the aeration device of the present invention will be described with reference to Figs. 6A and 6B. 6A and 6B show a state diagram of the case where the aeration device of the present invention performs an aeration operation.

Although the aeration device of the present invention is not shown in the drawing, when the power switch is turned on, the motor 2 of the aeration device is rotated to lower the aeration tank P by the spiral blades 4 of the hollow shaft 3. At the same time the waste water is stirred, the on-off valve 5 is turned on so that the air sucked through the inlet 32 is discharged through the exhaust port 31 along the hollow shaft 3 to the aeration tank P. By the rotation of 4) and the discharge of the air through the exhaust port 31 is aerated action in the aeration tank (P). In particular, as shown in Figure 6a in the present invention, the guide portion 8 is configured at the lower end of the casing (1) to uniformly aeration action throughout the aeration tank (P) by guiding the dissolved air flow downwards This can be configured to be done. That is, the wastewater flows through the guide hole 82 based on the rotation of the spiral blade 4 to form a vortex in the same direction as the rotation direction of the spiral blade 4, and the vortex flows through the guide pipe 83. It is guided downward of the induction pipe 83 and scattered at the bottom of the aeration tank P. Thus, the dissolved vortices scattered at the bottom are scattered upward based on the rising force of the dissolved oxygen and are uniform in the entire aeration tank P. Aeration is to be done.

In this case, it is reasonable to mount the vortex preventing plate 6 in the casing 1 to prevent the vortex flowing back into the guide hole 82 as the spiral blade 4 rotates.

On the other hand, the present invention can be used in a relatively small aeration tank (P) as shown in Figure 6b, in this case, by bending the connecting portion 81 in the upward direction, the induction pipe 83 of the casing (1) The lower end of the induction pipe 83 while wrapping the lower portion is configured in a shape surrounding the spiral wing 4 can be configured to aeration in the aeration tank (P) having a relatively small depth. In this case, the lower part of the induction pipe 83 surrounds the spiral wing 4 so that it is not necessary to install a separate vortex preventing plate 6.

That is, as shown in Figure 6a and 6b of the present invention, the aeration device according to the depth of the aeration tank (P) can be used to adjust the degree to which the guide portion 8 is exposed from the lower portion of the casing (1) aeration tank ( P) Aeration can be made uniform throughout.

On the other hand, the sewage and wastewater treatment apparatus 100 using the aeration apparatus according to the present invention is formed in a predetermined space, as shown in Figure 7 the oxidizing sphere reaction tank 110, the effluent waste tank is filled therein, the oxidizing sphere reaction tank 110 Is installed in the aeration device (P), the aeration device (P) connected to the aeration device (P) to perform an aeration or agitation (aerobic or anoxic conditions) in the oxidizer sphere 110, the operation of the aeration device (P) Control means for controlling (not shown), the inlet pipe 120 is provided on one side of the oxidizer ball reaction tank 110 to provide a movement path of the inflow and wastewater, the oxidizer ball reactor is installed on one side of the oxidizer ball reactor 110 It is installed on one side of the sedimentation tank 140, the sedimentation tank 140 for sedimenting the activated sludge mixed liquid discharged from the effluent pipe 130, providing a movement path of the activated sludge mixture liquid Effluent water pipe 150 to provide the movement path of the treated water, the sludge precipitated in the settling tank 140, the conveying sludge pipe 160 to provide a moving path to be transported to the oxidizer ball reaction tank 110, the oxidation sphere reaction tank The sludge dehydrator 180 for dewatering the sludge conveyed through the excess sludge pipe 170 and the excess sludge pipe 170 for directly drawing and transporting the activated sludge mixed liquid from the 110 is configured.

Here, the aeration device (P) is installed on one side of the inside of the oxidizing sphere reaction tank 110 to intermittently aeration of the oxidizing sphere reaction tank 110, the oxidizing sphere reaction tank 110 in accordance with the operation of the aeration device (P) When aerated, aerobic conditions or when agitated, anoxic conditions.

The aeration device (P) is installed obliquely at an angle of about 45 degrees with respect to the horizontal plane of the oxidizer sphere 110 to intermittently aeration of the oxidizer sphere 110.

On the other hand, the aeration device (P) is provided with a control means (not shown) for controlling the operation of the aeration device (P) on one side thereof, which is connected to the aeration device (P) according to the external input signal It can be controlled automatically or manually according to the administrator's choice.

The dehydrator 180 is connected to one side of the oxidizing sphere reaction tank 110 to draw and dehydrate the activated sludge solution from the oxidizing sphere reaction tank 110, if any that can be dehydrated by drawing the active sludge solution used Although it is good, it is preferable to use a screw type dehydrator, More preferably, a multi disc type screw type dehydrator is used.

One side of the dehydrator 180 is installed in an underwater pump (not shown), and the underwater pump is connected to the excess sludge pipe 170 installed at one side of the oxidation sphere reactor 110 to operate the pump. It is possible to draw the activated sludge liquid from the oxidizing sphere reaction tank 110 by.

The precipitation tank 140 is to precipitate the sludge present in the treated water discharged from the oxidizing sphere reaction tank 110, any of the precipitation tank 140 is commonly used.

Referring to the operation of the sewage and wastewater treatment apparatus 100 as follows.

First, the sewage / wastewater generated from the contaminant is passed through the inflow water pipe 120 to be introduced into the oxidizer ball reaction tank 110, and the sewage and waste water introduced into the oxidizer ball reaction tank 110 is installed in the oxidizer ball reaction tank 110. In accordance with the operation of (P), it is intermittently abandoned, and sewage and wastewater are treated by repeatedly performing aerobic and anoxic conditions. In addition, in order to control the ASRT of the oxidizing sphere reaction tank 110, the activated sludge mixture in the oxidizing sphere reaction tank 110 is directly drawn and passed through the excess sludge pipe 170 installed at one side of the oxidizing sphere reaction tank 110 to screw-type dehydrator Dehydration by 180, the filtrate is to be recovered to the oxidizing sphere reactor 110.

Then, the aerobic conditions and anoxic conditions are repeatedly formed and the treated water is introduced into the settling tank 140 through the effluent pipe 130 installed at one side of the oxidizing sphere reaction tank 110, the settling tank 140 Sludge present in the treated water introduced into the) is precipitated to the bottom surface of the sedimentation tank 140 and then returned to the oxidizer ball reaction tank 110 through the conveying sludge pipe 160 connected to the lower end of the sedimentation tank 140. , The sludge is treated water is discharged to the outside through the discharge water pipe 150 formed on one side of the settling tank 140.

The above description has been described as an example by the embodiment of the present invention, but is not limited to the above-described embodiment and those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. . Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description in the specification but should be defined by the claims.

1: casing 2: motor
3: hollow shaft 4: spiral wings
5: on-off valve 6: eddy current prevention plate
7: support stand 8: guide part
100 wastewater treatment device

Claims (7)

A motor, a hollow shaft rotating in association with the motor, an on / off valve at the top of the hollow shaft, a spiral wing formed at an outer periphery of the bottom of the hollow shaft, and a receiving space therein to form the motor, the hollow shaft, the on / off valve A casing which is accommodated but formed to expose a portion where a spiral wing is formed at the lower end of the hollow shaft, and a guide part which is connected by a plurality of connecting parts at the lower end of the casing, and a tubular guide tube is formed at the lower part of the spiral wing. But
The guide portion is formed by a plurality of induction holes by the connecting portion, the induction pipe is characterized in that the aeration is formed larger than the diameter of the helical blade in the lower portion of the helical blade.
delete delete delete The method of claim 1,
An aeration device characterized in that at least one discharge hole is formed at the bottom of the hollow shaft.
6. The method of claim 5,
The discharge hole is formed in the lower end of the hollow shaft, characterized in that the aeration device characterized in that formed in the portion where the spiral blade and the hollow shaft contact.
Oxidation sphere reaction tank into which sewage and waste water flow in, aeration device or aeration device of any one of claims 1, 5 and 6 mounted to perform aeration or stirring in the oxidation sphere reaction tank, and activated sludge mixture liquid from the oxidization sphere reaction tank. A sewage and wastewater treatment apparatus comprising a dehydrator for directly drawing and dewatering sludge, and control means for interlocking control of the operation of the aerator and the dehydrator.

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