CN201762166U - Underwater aerator - Google Patents

Abstract

The utility model belongs to the field of environmental protection equipment, relates to an aeration equipment for biochemical treatment of sewage, and specifically discloses an underwater aerator. The utility model aerator comprises a motor, a motor shaft, an impeller, an aeration chamber with openings at both ends, an air intake pipe, and a guide cylinder. The impeller is located inside the aeration chamber. The wall of the aeration chamber and the steel plate together form two closed ring-shaped gas collection chambers, and the part of the wall of the aeration chamber corresponding to the gas collection chamber is covered with air holes. A disc-shaped hollow porous crushing plate with densely distributed small holes is arranged between the wall of the aeration chamber in the air-collecting chamber and the outer cylinder. The aerator has simple structure, small volume and low equipment investment cost. Placed underwater, no blower is required, and the noise is low. The porous broken piece and the aeration chamber wall with air holes are arranged, so that the air can be completely broken, the suction volume and aeration efficiency are significantly improved, and the power consumption is saved.

Description

underwater aerator

technical field

The utility model belongs to the field of environmental protection equipment, and relates to an aeration equipment for biochemical treatment of sewage, in particular to an underwater aerator.

Background technique

With the development of my country's economy and the improvement of people's lives, people pay more and more attention to the living environment. Therefore, in the past ten years, various sewage treatment plants have been built all over the country to protect my country's water resources and environment and ensure people's drinking water safety. Among the methods and processes of sewage treatment, the oxidation ditch process is widely used because of its simple management, strong impact resistance and ideal treatment effect. The key equipment in oxidation ditch process sewage treatment is aeration equipment. At present, the aeration equipment used in this process includes inverted umbrella aerator, rotating brush aerator, rotating disc aerator, etc., but these aeration equipment can only be installed on the water surface, resulting in low oxygenation efficiency and equipment The volume is huge, and it is composed of many parts, especially it must be equipped with a high-power reducer. Its cost is very high, the structure is complicated and damaged, and the maintenance workload is large. Moreover, placing the motor on the shore generally has the disadvantages of high noise, affecting surrounding residents, high energy consumption, low efficiency, shallow water treatment, and large floor space.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provide an underwater aerator that can be placed underwater at a depth of 4 to 6 meters for oxygen inhalation and aeration.

The purpose of this utility model is achieved through the following technical solutions:

An aerator includes a motor, a motor shaft, an impeller, an aeration chamber with openings at both ends, an air intake pipe, and a guide cylinder. The impeller is located inside the aeration chamber. The wall of the air chamber and the steel plate together form two closed ring-shaped air collection chambers, and the part of the wall of the aeration chamber corresponding to the air collection chamber is distributed with air holes.

A disc-shaped hollow porous crushing plate with densely distributed small holes is arranged between the wall of the aeration chamber in the air-collecting chamber and the outer cylinder.

The porous broken plate is perpendicular to the wall of the aeration chamber.

The number of said porous crushing plate is 1 or more.

The air distribution holes on the wall of the aeration chamber and the small holes on the porous crushing plate are round, square, triangular or other geometric shapes, and the diameter of the holes is 2-60 mm.

The motor is placed underwater and connected to the impeller through the motor shaft to transmit kinetic energy to the impeller.

The impeller is composed of 3 to 4 propeller paddle-shaped blades, which are vortex-shaped and have a diameter of 150-1000 mm. Smaller-diameter propeller blades are conducive to generating stronger negative pressure, which not only has a large amount of inflation, but also has low power consumption, and the small blades rotate at a high speed driven by the motor, which can generate more powerful shock waves and better cutting and crushing effects .

The air intake pipe is perpendicular to the horizontal plane, its top protrudes from the water surface, and its bottom end communicates with the gas collection chamber, and the upper part of the air intake pipe is provided with an air volume regulating valve.

The guide tube is telescopic and welded at one or both ends of the aeration chamber.

The outlet guide port of the guide tube is trumpet-shaped, tapered or straight barrel-shaped, preferably trumpet-shaped. The trumpet-shaped guide port can expand the water flow surface, so that the aeration water flow spreads throughout the aeration tank, avoiding dead ends.

The guide port is provided with two longitudinal guide plates, and the distance between the two guide plates can be adjusted according to specific needs.

The motor is a variable frequency speed regulating motor, and the speed can be adjusted freely between 0 and 2800rpm according to the needs, and the motor can also be a standard motor.

The underwater aerator is installed on a liftable sliding bracket, and can be lifted up and down according to needs to achieve the best use effect.

The beneficial effects of the utility model:

The motor and aeration unit of the underwater aerator of the utility model are all placed underwater, and the noise is low. Only a short motor shaft is needed to drive the impeller, which greatly reduces the cost and power consumption, and can dive into the deep pool bottom. , the treatment water depth can reach 6 meters.

The impeller rotates at high speed in the aeration chamber to generate strong negative pressure shock waves and rotary shear force, and the air is sucked into the air collection chamber through the intake pipe, and the air entering the air collection chamber passes through the porous broken pieces and the aeration chamber under the action of the shock wave and rotary shear force. When the pores on the wall of the air cavity are distributed, the air masses and air chains are chopped, and then cut, crushed and mixed by the high-speed rotating impeller in the aeration chamber, so that they are greatly broken and fully dissolved in the water, which significantly improves the aeration. Efficiency: The air distribution holes are all over the annular inner wall of the air collection chamber, so that the inhaled air can be supplied to the impeller in a 360-degree direction for rotary cutting and mixed aeration, which also greatly improves the suction volume and aeration efficiency. It can reach 400-600m ³ /h without additional blower, and the utilization rate of oxygen can reach 60%-90%, achieving the purpose of high oxygenation of pool water. At the same time, due to the primary crushing of the air by the porous broken pieces and the air distribution holes on the wall of the aeration chamber, the power consumption is saved and the operating cost is reduced.

Because the impeller of the aerator of the utility model is small, the speed required for normal operation is relatively high, generally above 1000rpm, and the kinetic energy can be directly provided by the frequency conversion speed regulating motor or standard motor, and no additional reducer is required, which reduces the cost , Overcome the defect of inconvenient maintenance of the reducer.

The upper part of the intake pipe is equipped with an air volume regulating valve. When oxygen supply is required during the aeration process, the valve can be opened to allow it to inhale. Push flow and stir in water to achieve the purpose of one machine with multiple functions.

To sum up, the aerator has simple structure, small volume and low equipment investment cost. Placed underwater, no blower is required, and the noise is low. The existence of porous fragments and the aeration chamber wall with air holes all over them complement each other with the shock waves generated by the high-speed rotation of the impeller, so that the air can be broken to a great extent, the suction volume and aeration efficiency are significantly improved, and the power consumption is saved. The operating cost is the key equipment for the biochemical treatment of various industrial sewage and urban domestic sewage by using the oxidation ditch process. This equipment can also be used for the treatment of lake and urban river sewage.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the underwater aerator in Example 1.

1 is the underwater motor, 2 is the motor shaft, 3 is the impeller, 4 is the aeration chamber, 5 is the air collection chamber, 6 is the air intake pipe, 7 is the air volume regulating valve, 8 is the guide tube, 9 is the guide port, 10 For the aeration chamber wall, 12 is an outer cylinder.

Fig. 2 is a schematic structural diagram of the underwater aerator in Embodiment 2.

1 is the underwater motor, 2 is the motor shaft, 3 is the impeller, 4 is the aeration chamber, 5 is the air collection chamber, 6 is the air intake pipe, 7 is the air volume regulating valve, 8 is the guide tube, 9 is the guide port, 10 is an aeration chamber wall, 12 is an outer cylinder, and 13 is a porous broken plate.

Fig. 3 is a schematic diagram of the structure of the porous crushing plate in the underwater aerator of Example 2.

Fig. 4 is a schematic diagram of the structure of the guide ports in the underwater aerators of Embodiment 1 and Embodiment 2.

9 is a guide port, and 11 is a guide plate.

Detailed ways

Example 1

The underwater aerator (see Figure 1 for the schematic diagram of the structure) includes an underwater motor 1, a motor shaft 2, an impeller 3, an aeration chamber 4 with openings at both ends, an air intake pipe 6, and a guide tube 8, and the impeller 3 is located in the aeration chamber 4. Inside, the outer layer of the aeration chamber 4 is provided with an outer cylinder 12, together with the aeration chamber wall 10 and the steel plate to form an annular gas collection chamber 5 with both ends closed, the part of the aeration chamber wall 10 corresponding to the gas collection chamber 5 There are pores all over the cloth.

The air distribution holes of the aeration chamber wall 10 are small circular holes with a diameter of 6mm.

The underwater motor 1 is placed underwater, and is connected with the impeller 3 through a horizontal motor shaft 2 .

The impeller 3 is made up of 4 propeller paddle-shaped blades and is vortex-shaped.

The air intake pipe 6 is perpendicular to the horizontal plane, and its top stretches out from the water surface, and the bottom end communicates with the gas collection chamber 5, and the air intake pipe 6 top is provided with an air volume regulating valve 7.

The guide tube 8 is telescopic and welded on the front end of the aeration chamber 4 .

The outlet guide port 9 of the guide tube 8 is trumpet-shaped, and is provided with two longitudinal guide plates 11 (see FIG. 4 for a schematic view of the structure).

The motor 1 is a variable-frequency speed-regulating motor 1, and the speed can be adjusted freely between 0 and 2800 rpm as required.

The aeration unit is installed on a liftable sliding bracket, which can be lifted up and down according to the needs to achieve the best use effect.

Aerator working status description:

The kinetic energy of the underwater motor 1 is transmitted to the impeller 3 through the motor shaft 2, and the impeller 3 rotates at a high speed to generate negative pressure in the aeration chamber 4. On the one hand, the pool water is sucked into the aeration chamber 4 from the gap behind the impeller 3. On the other hand, The air is sucked into the air collection chamber 5 through the air intake pipe 6, and the air entering the air collection chamber 5 is broken by the shock waves generated by the high-speed rotation of the impeller 3 and the small holes in the aeration chamber wall 10, and the broken air flows from all angles of the aeration chamber wall 10 Enter the aeration chamber 4. The water and air in the aeration chamber 4 are further cut and mixed by the high-speed shock wave and the impeller 3, the air is uniformly dissolved in the water in the state of extremely small particles, and finally the water body mixed with sufficient oxygen passes through the pushing action of the impeller 3. The guide tube 8 at the front end of the aeration chamber sprays out and fully mixes with the pool water.

Use the aerator of this embodiment to aerate and oxygenate the pool with a depth of 5.5 meters, and use the intelligent vortex flowmeter to measure its air intake per hour to be 400m ³ , and the oxygen utilization rate measured by the dissolved oxygen meter is 60%. .

Example 2

The underwater aerator (see Figure 2 for the schematic diagram of the structure) includes an underwater motor 1, a motor shaft 2, an impeller 3, an aeration chamber 4 with openings at both ends, an air intake pipe 6, and a guide tube 8, and the impeller 3 is located in the aeration chamber 4. Inside, the outer layer of the aeration chamber 4 is provided with an outer cylinder 12, together with the aeration chamber wall 10 and the steel plate to form an annular gas collection chamber 5 with both ends closed, the part of the aeration chamber wall 10 corresponding to the gas collection chamber 5 There are pores all over the cloth.

Five disc-type hollow porous crushing plates 13 are arranged between the aeration chamber wall 10 and the outer cylinder 12 in the gas collecting chamber 5 , and the porous crushing plates 13 are densely covered with small holes and are perpendicular to the aeration chamber wall 10 . The porous crushing plate 13 is hollow in the form of a flat disk, and its inner diameter is exactly equal to the outer diameter of the aeration chamber 4, and its outer diameter is exactly equal to the inner diameter of the outer cylinder 12. The schematic diagram of the porous crushing plate 13 is shown in FIG. 3 .

The air distribution holes of the aeration chamber wall 10 and the small holes on the porous crushing plate 13 are circular in shape with a diameter of 6mm.

The underwater motor 1 is placed underwater, and is connected with the impeller 3 through a horizontal motor shaft 2 .

The impeller 3 is made up of 4 propeller paddle-shaped blades and is vortex-shaped.

The air intake pipe 6 is perpendicular to the horizontal plane, and its top stretches out from the water surface, and the bottom end communicates with the gas collection chamber 5, and the air intake pipe 6 top is provided with an air volume regulating valve 7.

The guide tube 8 is telescopic and welded on the front end of the aeration chamber 4 .

The outlet guide port 9 of the guide tube 8 is trumpet-shaped, and is provided with two longitudinal guide plates 11 (see FIG. 4 for a schematic view of the structure).

The motor 1 is a variable-frequency speed-regulating motor 1, and the speed can be adjusted freely between 0 and 2800 rpm as required.

The aeration unit is installed on a liftable sliding bracket, which can be lifted up and down according to the needs to achieve the best use effect.

Aerator working status description:

The kinetic energy of the underwater motor 1 is transmitted to the impeller 3 through the motor shaft 2, and the impeller 3 rotates at a high speed to generate negative pressure in the aeration chamber 4. On the one hand, the pool water is sucked into the aeration chamber 4 from the gap behind the impeller 3. On the other hand, The air is sucked into the air-collecting chamber 5 through the air intake pipe 6, and the air entering the air-collecting chamber 5 is broken by the shock waves generated by the high-speed rotation of the impeller 3 and the small holes in the porous crushing plate 13 and the aeration chamber wall 10, and the broken air is released from the aeration chamber. Various angles of the chamber wall 10 enter the aeration chamber 4 . The water and air in the aeration chamber 4 are further cut and mixed by the high-speed shock wave and the impeller 3, the air is uniformly dissolved in the water in the state of extremely small particles, and finally the water body mixed with sufficient oxygen passes through the pushing action of the impeller 3. The guide tube 8 at the front end of the aeration chamber sprays out and fully mixes with the pool water.

Utilize the aerator of this embodiment to carry out aeration and oxygenation to the pool with a depth of 5.5 meters, and use the intelligent vortex flowmeter to measure the air intake per hour to be 450m ³ , and the utilization rate of oxygen as measured by the dissolved oxygen meter is 68%. .

The above-mentioned embodiment is only to describe the preferred implementation of the present utility model, not to limit the concept and scope of the present utility model. Various modifications and improvements made in the technical solution should fall within the scope of protection of the utility model, and the technical content claimed in the utility model has been fully recorded in the claims.

Claims (10)

1. Underwater aerator, including underwater motor (1), motor shaft (2), impeller (3), aeration chamber with openings at both ends (4), air intake pipe (6), and guide tube (8) , the impeller (3) is located inside the aeration chamber (4), and it is characterized in that an outer cylinder (14) is arranged on the outer layer of the aeration chamber (4), and the outer cylinder (12) is surrounded by the aeration chamber wall (10) and the steel plate. It forms an annular air collection chamber (5) with both ends closed, and the part of the aeration chamber wall (10) corresponding to the air collection chamber (5) is covered with air distribution holes. 2. The aerator according to claim 1, characterized in that a plate with densely distributed small holes is arranged between the aeration chamber wall (10) and the outer cylinder (12) in the air collecting chamber (5). Formula hollow porous crushing plate (13). 3. The aerator according to claim 2, characterized in that the porous broken plate (13) is perpendicular to the aeration chamber wall (10). 4. The aerator according to claim 2 or 3, characterized in that the number of said porous crushing plates (13) is 1 or more. 5. The aerator according to claim 1 or 2, characterized in that the air distribution holes of the aeration chamber wall (10) and the small holes on the porous broken plate (13) are round, square or triangular in shape , the aperture is 2-60mm. 6. The aerator according to claim 1, characterized in that the impeller (3) is composed of 3 to 4 propeller blades in a vortex shape. 7. The aerator according to claim 1, characterized in that the air inlet pipe (6) is perpendicular to the horizontal plane, its top protrudes from the water surface, and the bottom end communicates with the gas collection chamber (5), and the air inlet pipe (6) ) is provided with an air volume regulating valve (7) on the upper part. 8. The aerator according to claim 1, characterized in that the guide tube (8) is telescopic, welded to one or both ends of the aeration chamber (4), and the guide tube (8) The outlet guide port (9) is trumpet-shaped, tapered or straight barrel-shaped. 9. The aerator according to claim 1, characterized in that the guide port (9) is provided with two longitudinal guide plates (11). 10. The aerator according to claim 1, characterized in that the motor (1) is a frequency conversion motor or a standard motor. the

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