KR200456162Y1 - Underwater airation and underwater agitating device by control of rotating·backlashing - Google Patents

Abstract

The present invention relates to an underwater agitation and underwater aeration device according to the forward and reverse rotation control, and to remove organic matter and nitrification by supplying oxygen in a single reactor in the process of removing organic matter and nutrients (nitrogen, phosphorus) from waste water. It is characterized in that the aeration function of the aerobic zone for, and the agitation function of the anaerobic zone for removing nutrients is made by the forward and reverse rotation control.

Therefore, during the aerobic process, the impeller of the underwater stirrer is reversed to form turbulent flow through the spiral flow rate increasing device, which makes strong contact with air bubbles generated from the diffuser, thereby minimizing head loss, reducing the required power, and doubling the gas-liquid transfer speed. There is a characteristic that greatly increases the oxygen absorption rate.

Turbulent flow, head (the energy of a fluid unit of length), underwater stirrer

Description

Underwater airation and underwater agitating device by control of rotating · backlashing}

The present invention relates to an underwater agitation and underwater aeration device according to forward and reverse rotation control, and more specifically, to supply oxygen into a single reaction tank in a process of removing organic matter and nutrients (nitrogen, phosphorus) contained in wastewater and wastewater. The aeration function of the aerobic zone for organic matter and nutrients and nitrification and the agitation function according to the forward and reverse rotation control to remove organic matter and nutrients are provided in the anaerobic zone. Turbulent flow is formed through the flow rate increasing device, so that the air bubbles generated from the diffuser and the organic matter and nutrients are strongly contacted to minimize head loss, thereby reducing the required power, and doubling the gas-liquid transfer rate to greatly increase the oxygen absorption rate. The present invention relates to an underwater agitation and underwater aeration device in accordance with forward and reverse rotation control.

As the modern society is industrialized and industrialized, the amount of wastewater discharged from homes and industrial sites is gradually increasing, and accordingly, there are quite a lot of conventional technologies for methods and facilities for treating wastewater. have.

In general, the most commonly used methods for treating wastewater and wastewater include chemical treatment and biological treatment.

The chemical treatment method is fast, but there is a problem of additional contamination by chemicals, so biological treatment is widely used. Among them, the active sludge method has been actively studied.

The activated sludge method aerated and agitated the waste water in the aeration tank together with the activated sludge (aerobic bacteria) to almost satisfy BOD (biological oxygen demand), and colloidal or dissolved substances in sewage precipitate or adhere to the activated sludge to become clean water. It refers to a method of treating wastewater by separating the precipitated material after one purification operation and then discarding or returning it to the main treatment process if necessary.

In addition, the aeration device used in the activated sludge method is a forced air submerged aeration device that normally supplies air by using a blower, and a self-contained single impeller that sucks sewage and air by the rotational force of a single impeller. It is divided into type underwater aeration system.

The forced air type underwater aeration device is used in connection with an air supply pipe, and can be denitrified and dephosphorized by agitation and air supply, and the oxygen supply can be controlled by increasing or decreasing the oxygen supply capacity and the air flow rate with a high efficiency design. It is easy.

In addition, the self-suction single impeller-type underwater aeration device does not need a blower-related piping due to strong suction force, easy to install and maintain, simple structure, low failure rate, low noise, can be installed anywhere.

However, the forced air-type underwater aeration device is excellent in oxygen transfer rate, but there is a problem in that additional auxiliary equipment such as browers and plumbing facilities are required.

In addition, the self-contained single impeller-type aeration system or double impeller-type aeration system does not require additional equipment including a separate brower and plumbing facilities, compared to a forced air aeration system, but the oxygen transmission rate per unit power (KW) Since it is considerably inferior to this forced air supply type, it is not suitable as an underwater aeration apparatus which requires biologically large amounts of oxygen and treats wastewater using microorganisms.

Therefore, an object of the present invention for solving the above problems is to control the forward and reverse rotation of the stirring function in a state in which the aeration function of the aerobic region at the top and the agitation function for the anaerobic region at the bottom are integrally provided in a single reactor. Multi-function is complementary by rotating the impeller of the underwater stirrer in the anaerobic zone during the aerobic process, and the turbulence generated through the spiral flow rate riser rises and the water comes into contact with air bubbles generated from the diffuser. It provides a stirring and underwater aeration device.

As described above, the present invention underwater agitator and underwater aeration device reversely rotate the impeller of the underwater agitator during aerobic process in a single reactor to form a turbulent flow containing organic matter and nutrients through a spiral flow riser to generate in the diffuser. By colliding strongly with the air bubbles, it is possible to minimize head loss and to reduce the required power, and to increase the oxygen absorption rate by doubling the gas-liquid transfer rate.

In addition, the present invention does not require a separate pipe is easy to install and maintain, the structure is simple, the failure rate is low, the noise is low, there is an effect that can be installed in any place.

Hereinafter, the present invention by the accompanying drawings in detail as follows.

1 is an exploded perspective view showing the present invention underwater stirring and underwater aeration apparatus, Figure 2 is a combined perspective view showing the present invention underwater agitating and underwater aeration apparatus, Figure 4 is a water agitator and underwater aeration apparatus It is the cross-sectional view shown.

Invented underwater stirring and underwater aeration device (1) is installed in a single reactor (10) to purify the waste water and wastewater, divided into anaerobic zone 12, buffer zone, aerobic zone (11) from the lower direction to the upper direction In the anaerobic region 12, the stirring function and the aerobic region 11 are further added to the aeration function.

Therefore, in the underwater stirring device and the aeration device 1, the flow rate increasing device 22 has a hopper 35, 35 'formed to face up and down in a cylindrical shape to form an janggu shape, and the length is formed on the inner circumferential surface of the cylindrical shape. In the process of forming a spiral 23 in the direction of the stirring mineral and nutrients along the spiral 23 is rapidly rising turbulence is generated and supplied to the top.

In addition, the flow rate increasing device 22 is provided with a pair of pedestals 36 so as to be spaced apart from the bottom of the reaction tank 10 and attached to the outer circumferential surface of the hopper 35 'located below.

In addition, since the flow rate increasing device 22 has a cylindrical shape, a water stirrer 33 inserted therein forms a gap with the spiral 23 formed on an inner circumferential surface thereof, and a flow rate increasing device is disposed on the lower outer circumferential surface of the water stirrer 33. The fixing member 24 is bolted to fix the lower inner peripheral surface of the 22.

The underwater stirrer 33 is an underwater motor 30 so that the impeller 26 is attached to the end by exposing the rotating shaft 31 to the outside in a vertical direction in a state where the underwater motor 30 that is forward and reversely rotated inside is tightly installed. ), A watertight casing 34 is formed.

The lead wire for supplying power to the lifting ring 28 and the underwater motor 30 is drawn out of the watertight casing 34 so as to lift the underwater stirrer 33 or the underwater stirrer and the underwater aeration device 1.

Accordingly, the underwater stirrer 33 penetrates into the flow rate increasing device 22 so that the impeller 26 is exposed to the lower portion of the flow rate increasing device 22 and positioned between the pedestals 36, and the upper portion of the water speed increasing device 22 is located therein. It is preferable to be installed to protrude to the top of the.

In addition, an air pipe 32 having a circular or square ring shape horizontally with the underwater stirrer 33 is positioned around the hopper 35 formed on the upper portion of the flow rate increasing device 22, and the air pipe 32 is disposed. To support, each post 25 is attached in a vertical direction between the bottom of the air pipe 32 and the top of the pedestal 36 to be fixed in all directions.

On the other hand, the air pipe 32 is through the air to supply air to flow inside, although not shown in the figure on one side of the upper surface is provided with a forced air supply (27) connected to the air hose to supply air from the outside .

In addition, a plurality of diffusers 21 are attached to the upper surface of the air pipe 32 at a predetermined interval to supply air to the air pipe 32 to discharge the flowing air to the outside to form air bubbles 29.

Therefore, the present invention underwater stirring and underwater aeration device (1) is turbulent through the flow rate riser 22 of the spiral 23 inside the spiral while the impeller 26 reverse rotation in the aerobic region 11 of the organic matter removal and nitrification process Is formed to strongly collide with the air bubbles 29 generated in the diffuser 21 and the minerals and nutrients, and in the anaerobic region 12 of the denitrification and dephosphorization process, the impeller 26 is rotated forward and stirred to react. Promote.

Figure 3 is a front view showing the device designed to increase the flow rate of the spiral is formed on the inner circumferential surface in a cylindrical shape to accelerate the ascending speed along the spiral (23) as well as in the process of rising along the spiral (23) It is a structure that generates turbulence by rotating like a swirl.

 Figure 5 is a state diagram showing the embodiment of the present invention underwater stirring and underwater aeration apparatus.

The present invention is to install the underwater stirring and underwater aeration device (1) in the reaction tank (10) according to the forward and reverse rotation control to remove the organic matter and nutrients (nitrogen, phosphorus) of the waste water, oxygen in a single reaction tank (10) The aeration process is added to the aerobic motor (11) of the underwater stirrer (33) having a stirring function in the anaerobic zone (12) to remove nutrients by adding aeration in the aerobic zone (11) for removing organic matter and nitrification Reverse rotation of the impeller 26 of the underwater agitator 33 forms a turbulent flow through the spirally increasing flow rate device 22 to strongly form the air bubbles 29 generated in the diffuser 21. By minimizing head loss by reducing collision, the required power is reduced, and the oxygen absorption rate is greatly increased by doubling the gas-liquid transfer rate.

1 is an exploded perspective view showing the present invention underwater stirring and underwater aeration device.

Figure 2 is a perspective view showing a combination of the present invention underwater stirring and underwater aeration device.

Figure 3 is a front view showing the present invention flow rate increase device.

Figure 4 is a cross-sectional view showing the present invention underwater stirring and underwater aeration device.

Figure 5 is a use state showing an embodiment of the present invention underwater stirring and underwater aeration device.

Explanation of symbols on the main parts of the drawings

1: Underwater Stirring and Underwater Aerator 10: Reactor

11: aerobic zone 12: anaerobic zone

21: diffuser 22: velocity increasing device

23: spiral 24: fixing member

25: Post 26: Impeller

27: forced supply 28: lifting ring

29: Air bubble 30: Submersible motor

31: rotating shaft 32: air piping

33: Underwater Agitator 34: Watertight Casing

35, 35 ': Hopper

Claims (4)

delete Pedestal 36 is attached to be spaced apart from the bottom surface is inserted into a single reactor 10, the flow rate to form turbulence when the inorganic and nutrients precipitated in the lower portion of the reaction tank 10 to the diffuser 21 located in the upper portion A riser 22; The watertight casing 34 inserted to be inserted into the flow rate increasing device 22 is provided with a lifting ring 28 on an upper surface thereof, and an underwater motor 30 capable of forward / reverse rotation therein, wherein the underwater motor ( The end of the rotation shaft 31 of the 30) is an underwater stirrer 33 to which the impeller 26 is fastened so as to be exposed to the lower portion of the flow rate increasing device 22, and then agitates minerals and nutrients during the reverse rotation to the flow rate increasing device 22. )Wow; In the upper portion of the flow rate riser 22 is formed with an air pipe 32 which is positioned horizontally with the water-tight casing 34 so that the rising turbulence and the air bubbles 29 collide with each other, the air flows through the flow of the incoming air, A forced air supply 27 formed on an upper surface of the air pipe 32 to supply air into the air pipe 32; In the underwater stirring and underwater aeration device consisting of a diffuser (21) forming the air bubbles 29 by discharging the air flowing through the forced air supply 27 to the air pipe 32 to the outside, The flow rate increasing device 22 has a cylindrical shape, and hoppers 35 and 35 'are formed to face the upper and lower ends thereof, and a helical 23 is formed on the inner circumferential surface thereof in a longitudinal direction so that the wastewater including inorganic matter and nutrients is helical. Underwater stirring and underwater aeration apparatus according to the forward and reverse rotation control, characterized in that turbulence occurs when it rises along (23). delete delete

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