KR101532770B1 - Differential pressure air diffuser - Google Patents

Abstract

The present invention relates to a differential pressure air diffuser which can improve the transmission efficiency of air (oxygen) for an aeration tank in an aeration process proceeding in a wastewater treatment plant and is easy for maintenance, management and replacement such as simply handling blockage and breakage without emptying the aeration tank. The differential pressure air diffuser comprises: a tank (200) wherein a first area (210) into which air flows and a second area (220) which is placed in a lower portion of the first area (210) and into which an aeration tank liquid is supplied are defined; an air inlet pipe (100) which is connected to an upper portion of the tank (200) and supplies air to the first area (210); an aeration tank liquid inlet pipe (400) which is connected to a side of the tank (200) and supplies an aeration tank liquid to the second area (220); a clean-out hole (500) which is connected to a lower portion of the tank (200) of the second area (220) and discharges foreign substances when cleaning the tank (200); and a plurality of line-mixer type pipe nozzles (300) of which one end is located on the boundary of the first and second areas (210, 220) in a side of the tank (200) and the other end is connected so as to reach the outside of the first area (210) of the tank (200).

Description

[0001] DIFFERENTIAL PRESSURE AIR DIFFUSER [0002]

The present invention can improve the efficiency of air (oxygen) delivery to the aeration tank in an aeration process carried out at a sewage / wastewater treatment plant, and can maintain, manage, repair and replace such that it can easily cope with occlusion and breakage without emptying the aeration tank The present invention relates to a differential pressure regulator.

For treatment of waste water / wastewater, biological treatment methods combined with physical and chemical treatment methods are mainly used. Such a biological treatment method can be largely classified into an anaerobic treatment method and an aerobic treatment method. The anaerobic treatment method is a treatment method using oxygen in the organic matter without requiring a separate air (oxygen) supply in the treatment tank, The aerobic treatment method is a method in which air (oxygen) is supplied into a treatment tank (aeration tank) using an acidifier or the like, dissolved in water and treated in the form of free oxygen.

Accordingly, it is important to transfer the air (oxygen) with high efficiency into the aeration tank by using an air diffuser or the like as the bottom / wastewater is treated by the aerobic treatment method. Such an air diffuser is usually installed inside aeration tank, and it is necessary to supply air with a small bubble size in order to transfer and supply air (oxygen) with excellent efficiency. Thereby, the contact specific surface area between the air bubbles and the liquid to be treated (aeration tank liquid) increases, and the air (oxygen) delivery rate to the aeration tank liquid can be further improved. If the air (oxygen) transmission rate is improved as described above, the number and size of the air diffusers to be installed in the aeration tank having the same processing capacity and the blower capacity can be reduced, so that the management is facilitated and the installation cost of the related equipment can be greatly reduced .

On the other hand, in the past, a membrane diffuser using a membrane membrane, a ball diffuser, or an underwater air laker have been mainly used as the diffuser.

The membrane membrane is swollen like a balloon by the compressed air introduced into the membrane separator, and bubbles are formed through the pores of the membrane membrane, thereby operating air in the aeration tank. However, since the bottom / wastewater contains a large amount of organic matter and inorganic substances, the sludge may be deposited outside the anaerobic device, for example, on the membrane membrane to inhibit the generation of bubbles, It may not be able to be shown. In addition, at the time of using the membrane producing apparatus for a long period of time, the air transfer efficiency may be greatly lowered due to deformation and breakage of the membrane membrane. Particularly, in the resting period of such a membrane air diffusing apparatus, sludge is stacked on the membrane membrane, There is a concern. Therefore, when the operation and the rest of the membrane diffuser are frequently operated, the life expectancy of the membrane due to the occlusion, breakage, and deformation of the membrane can be reduced and the air transmission rate can be further reduced.

In addition, when the membrane separator is to be repaired for replacement, repair, or maintenance, the entire aeration / wastewater treatment process may be greatly reduced in efficiency and economy because the aeration tank must be emptied and the above operation must be performed.

On the other hand, in the case of a ball type air diffuser, a spherical plastic ball is filled in the air diffuser body, the upper portion is sealed with a mesh type cover, air is introduced from the lower portion to make fine bubbles by collision of balls, ) To the aeration tank. However, such a ball type air diffuser may also cause a large amount of foreign matter to flow into the air diffuser body during clogging and power failure, resulting in clogging, which may significantly degrade the air delivery rate. In addition, if such a ball type diffuser is also required to be repaired for replacement, repair or maintenance, the entire aeration / wastewater treatment process can be greatly reduced in efficiency and economy since the aeration tank must be emptied and the above work must be performed.

In addition, the water aerator refers to a device for separating air bubbles coming out from an air pipe by applying a physical force using a stirrer or the like and dividing the air bubbles into small pieces. In the case of such an underwater aerator, unlike the above-described other types of the aeration apparatus, there is no clogging during rest period, sludge accumulation inside and outside the aeration apparatus is hardly occurred, and there is no trouble to empty the aeration tank during maintenance, have. However, such an underwater aerator requires extra equipment (such as a crane) for lifting due to heavy weight due to attachment of a motor-equipped stirrer, and is installed in water, and the temperature of the aeration tank is raised due to the heat of the stirrer motor, ) May be lowered. As a result, the efficiency and economical efficiency of the entire bottom / wastewater treatment process can be greatly reduced.

Accordingly, it is an object of the present invention to improve the efficiency of air (oxygen) transfer to the aeration tank in the aeration process performed in the bottom / wastewater treatment plant, and to maintain, manage, and maintain the aeration tank easily, And an easy-to-replace differential pressure type acid generator.

The present invention includes a tank 200 having a first region 210 into which air is introduced and a second region 220 below the first region 210 to which the aeration tank liquid is supplied. An air inlet pipe (100) connected to an upper portion of the tank (200) to supply air to the first region (210); Aeration tank inflow pipe (400) connected to the side of the tank (200) and supplying aeration tank solution to the second region (220); A cleaning agent (500) connected to a lower portion of the tank (200) of the second region (220) to discharge foreign substances when cleaning the tank (200); And one end of the water is positioned on the boundary surface of the first and second areas 210 and 220 and the other end of the water is positioned outside the first area 210 of the tank 200 And a plurality of line mixer-type pipe nozzles (300) connected to the plurality of line mixer-type pipe nozzles (300).

The differential pressure type air diffusing apparatus of the present invention is a device for diffusing minute bubbles of air into aeration tank liquid (aeration tank liquid) while greatly increasing the contact area between air bubbles and a liquid to be treated (aeration tank liquid) And the contact time and contact surface area between the air and the aeration tank can be further increased by passing and discharging the aeration tank through which the air is supplied through the plurality of line mixer type pipe nozzles.

Therefore, the differential pressure type air diffusing device can significantly improve the air transfer efficiency to the aeration tank as compared with the existing membrane diffuser or ball diffuser. In addition, it is resistant to durability and corrosion by using non-corrosive metal (stainless steel) material instead of existing membrane diffuser material (P.E + EPDM rubber). When the inside of the tank reaches a predetermined pressure, the liquid is sprayed into the aeration tank through the plurality of line mixer type pipe nozzles and the secondary contact is made. And an increase in the specific surface area in contact between the air (oxygen) and the aeration tank. In addition, the life expectancy of the air diffuser by improving the material of the device body is increased, the damage and corrosion thereof can be greatly reduced, and the effect of reducing the installation volume and blower capacity by increasing the contact efficiency through the 1.2- You can expect. In addition, the phenomenon that the air transfer efficiency is reduced due to accumulation of sludge in the diffuser and other devices according to the use time can be greatly reduced.

Furthermore, as will be described in more detail below, it is possible to raise a plurality of the aeration apparatuses provided in the aeration tank without removing the liquid in the aeration tank, so that it is possible to more easily cope with obstruction and breakage of the aeration apparatus, Maintenance, maintenance, and replacement of the battery can be accomplished within a short time.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a schematic configuration of a differential pressure oxygenator according to an embodiment of the invention; FIG.
2 is a plan view showing a schematic configuration of the differential pressure type air diffusing apparatus of FIG.
3 is a schematic view showing an example of a differential pressure type air diffuser according to embodiments of the present invention installed in aeration tank.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a differential pressure generator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a schematic configuration of a differential pressure oxygenator according to an embodiment of the invention; FIG. 2 is a plan view showing a schematic configuration of the differential pressure type air diffusing apparatus of FIG.

1 and 2, a differential pressure type air diffuser 10 according to an embodiment of the present invention includes a first region 210 into which air flows, a second region 210 in which aeration tank liquid is supplied, A second region 220 of the tank 200 is defined; An air inlet pipe (100) connected to an upper portion of the tank (200) to supply air to the first region (210); Aeration tank inflow pipe (400) connected to the side of the tank (200) and supplying aeration tank solution to the second region (220); A cleaning agent (500) connected to a lower portion of the tank (200) of the second region (220) to discharge foreign substances when cleaning the tank (200); And one end of the water is positioned on the boundary surface of the first and second areas 210 and 220 and the other end of the water is positioned outside the first area 210 of the tank 200 And a plurality of line mixer-type pipe nozzles 300 connected to each other.

In the air diffuser 10, air compressed by an external air compressor or the like, which is separately provided, is introduced into the first region 210 of the upper portion of the tank 200 through the air inlet pipe 100, The aeration tanks introduced from the aeration tank in which the apparatus is installed can flow into the second region 220 under the tank 200 from the aeration tank inflow pipe 400 connected to the side of the tank 200.

The air thus introduced and the aeration tank liquid can come into contact with each other at the interface (i.e., gas-liquid interface) between the first and second regions 210 and 220. At the gas-liquid interface, the pressure of the compressed air, Turbulence in the tank 200 can be generated due to the pressure difference between the two. With this turbulence, the compressed air and the aeration tank contact with each other at a larger specific surface area, so that the bubbles of the compressed air can be supplied and transferred into the aeration tank liquid, whereby the primary air (oxygen) supply can be achieved.

The first aeration tank is supplied with the aeration tank liquid through a plurality of line mixer type pipe nozzles 300, one end of which is formed at the interface between the first and second areas 210 and 220, At this time, the contact between the air (oxygen) and the aeration tank is made secondarily. With respect to the aeration tank liquid supplied with air (oxygen), the bottom / wastewater treatment process by the aerobic treatment method can proceed.

In particular, the aeration tanks supplied with the primary air can pass through the plurality of line mixer-type pipe nozzles 300 (in the form of a spiral pipe) at a rising pressure of the compressed air. Therefore, the period of the liquid contact time and the contact surface area in the aeration tank liquid can be further increased in the process of rotating and passing. At this time, as the air bubbles become finer, the gas-liquid contact specific surface area can be greatly improved. As a result, the air diffusing efficiency of the aeration tank can be greatly improved by using the aeration apparatus of one embodiment.

Therefore, when the air diffuser of one embodiment is used, the efficiency of air (oxygen) transfer in the aeration tank can be greatly improved, and the number and capacity of the diffuser in the aeration tank can be greatly reduced, The management efficiency and economical efficiency of the wastewater treatment process can be greatly improved.

In the air diffuser 10 of the above-described embodiment, the tank 200 may be a cylindrical non-corrosive metal tank, for example, a cylindrical stainless steel tank, and the air inlet pipe 100, The inlet pipe 400 and the line mixer pipe nozzle 300 may be made of the same material as that of the tank 200 or may be made of another resin or the like as required.

As the tank 200 is made of such a noncorrosive metal material, it is possible to minimize the occurrence of breakage or corrosion due to the use of the air diffuser in the aeration tank for a long time. In addition, since the tank 200 is structured so as to be less clogged by sludge and foreign matter, the phenomenon that the sludge accumulates in the air diffuser according to the use time and the air transfer efficiency is reduced can be greatly reduced.

In addition, in the air diffuser 10, a cleaning agent 500 connected to the lower part of the tank 200 of the second area 220 is provided. Through the cleaning agent 500, the tank 200 It is possible to discharge foreign substances.

3 is a schematic view showing an example of a differential pressure type air diffuser according to embodiments of the present invention installed in aeration tank.

Referring to FIG. 3, a plurality of diffuser devices 10 may be installed in the aeration tank. Such diffuser devices 10 may be installed and connected to facilitate lifting and maintenance. The lifting cable 600 may further include a lifting cable 600 connected to an upper portion of the tank 200 of each of the fryers 10, And may be connected to the aeration tank top 700 through a separate fixing means, for example, a hook or the like.

The air inlet pipe 100 in the upper part of the tank 200 may be connected to the air supply main pipe 800 in the upper part of the aeration tank including the air diffuser 10 through a distribution pipe 901, Air can be supplied to the air inlet pipe 100 of each diffuser through the air supply main pipe 800 and the distributor pipe 901 connected thereto.

3, the air supply main pipe 800 can be connected to the plurality of air diffusers 10 through a plurality of distribution pipes 901, and the air supply main pipe 800 and the plurality of minute The pipe 901 may be detachably connected through a resin hose 900 having flexibility.

With this connection structure, it is possible to easily lift each diffuser 10 without purging the aeration tank using the lifting cable 600, thereby making it easier to cope with clogging and breakage of the diffuser Maintenance, maintenance, and replacement of the air diffuser can be made easier. Moreover, in lifting each of the air diffusers 10, since the air supply main pipe 800 and the plurality of distribution pipes 901 can be easily separated and lifted, managed, maintained, and inspected, It has the advantage of easy repair and easy maintenance.

As described above, the differential pressure type air diffusing apparatus of the present invention can significantly improve the air transfer efficiency to the aeration tank as compared with the existing membrane diffuser or ball diffuser, and the lifetime of the diffuser increases, The corrosion can be greatly reduced, and the phenomenon that the air transfer efficiency is reduced due to accumulation of the sludge in the air diffuser according to the use time can be greatly reduced.

In addition, since the lifting of a plurality of the aeration apparatuses provided in the aeration tank can be made easier without removing the liquid in the aeration tank, it is possible to more easily cope with obstruction and breakage of the aeration apparatus, Maintenance, and replacement can be made easier.

10: differential pressure type air diffusing device 100: air inlet pipe
200: tank 210, 220: first and second regions
300: line mixer type pipe nozzle 400: aeration tank inflow pipe
500: Cleanser 600: Cable for lifting
700: Above the top of aeration tank (lifting cable fixing part) 800: Air supply main pipe
901: Distribution pipe 900: Resin hose

Claims (6)

A differential pressure type diffuser immersed in aeration tank aeration tank;
A tank 200 in which a first region 210 into which compressed air flows and a second region 220 below the first region 210 in which aeration tank liquid is supplied are defined,
An air inlet pipe 100 connected to the upper portion of the tank 200 to supply compressed air to the first region 210,
Aeration tank inflow pipe (400) connected to a side surface of the tank (200) to supply aeration tank solution to the second area (220)
A cleaning agent 500 connected to a lower portion of the tank 200 of the second region 220 to discharge foreign substances when cleaning the tank 200,
The tank 200 is connected to the side of the tank 200 such that one end thereof is located on the interface between the first and second regions 210 and 220 and the other end is located outside the first region 210 of the tank 200. And a plurality of line mixer-type pipe nozzles (300) each of which has a helical pipe shape;
Air is supplied to the aeration tank liquid by contact between the compressed air and the aeration tanks at the interface between the first and second areas 210 and 220 and the aeration tanks supplied with the air are supplied to the line mixer- (10). ≪ / RTI >
delete The differential pressure oxygenator (10) of claim 1, wherein the tank (200) is a cylindrical non-corrosive metal tank.
The apparatus of claim 1, further comprising a lifting cable (600) connected to an upper portion of the tank (200)
The lifting cable 600 connects the tank 200 with the aeration tank top 700 including the aerosol generator 10.
The air conditioner according to claim 1, wherein the air inlet pipe (100) is connected to an air supply main pipe (800) at an upper part of the aeration tank including the air diffuser (10) through a distribution pipe (901)
Wherein the air supply main pipe (800) is connected to a plurality of air diffuser (10) through a plurality of distribution pipes (901).
The differential pressure type diffuser (10) according to claim 5, wherein the air supply main pipe (800) and a plurality of distribution pipes (901) are detachably connected through a flexible resin hose (900).

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