Aeration device for sewage treatment

Abstract

The utility model belongs to the technical field of sewage treatment equipment, and particularly discloses an aeration device for sewage treatment, which is characterized in that a rotating shaft is arranged in an aeration tank, the upper part of the rotating shaft is in transmission connection with a driving mechanism, a spiral stirring blade is arranged on the periphery of the rotating shaft, and a plurality of first aeration holes are formed in the bottom edge of the spiral stirring blade at intervals; the lower end part of the rotating shaft is sleeved with an aeration disc, second aeration holes are uniformly distributed in the top of the aeration disc, an aeration branch pipe is arranged in the rotating shaft in a penetrating manner, and an aeration fan sprays external air into sewage through the second aeration holes and the first aeration holes sequentially through an aeration main pipe, a connecting pipe and the aeration branch pipe, so that the aeration is more uniform; and the control box adjusts the power of the aeration fan and the rotation rate of the rotating shaft according to the detection result of the dissolved oxygen detector, so that the oxygen content in the sewage is kept in a proper range, and the automatic control of the aeration process is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment equipment, and specifically discloses an aeration device for sewage treatment. Background Art

[0002] In the water treatment process, aeration equipment is a key equipment for sewage biological treatment. Its function is to take certain technical measures to transfer oxygen in the air to the liquid in the aeration tank through the aeration device to supply the amount of oxygen required for the metabolism of aerobic organisms, and at the same time fully and evenly mix the water in the tank to achieve the purpose of biological treatment.

[0003] Most of the existing aeration devices use a blower to introduce air into the bottom of the aeration tank. The aeration port is usually fixedly installed inside the aeration tank, which makes it difficult to ensure that the air is fully in contact with the sewage. The aeration uniformity is poor and the aeration oxygen content is uneven, which can easily cause hypoxia or peroxygenation of the microbial strains in the aeration tank, affecting the sewage treatment efficiency. In addition, most of the existing aeration devices manually control the aeration time, which needs to rely on the personal experience of the operator and has a lag. Therefore, it is necessary to provide an aeration device for sewage treatment to improve the aeration uniformity and realize automatic control of the aeration process. Utility Model Content

[0004] In order to solve the problems in the background technology, the utility model discloses an aeration device for sewage treatment. The rotating shaft drives the spiral stirring blade to rotate and stir the material in the aeration tank. A plurality of first aeration holes are arranged at the bottom edge of the spiral stirring blade to make the aeration more uniform and realize automatic control of the aeration process.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An aeration device for sewage treatment comprises an aeration tank, a cover plate is arranged on the top of the aeration tank, a rotating shaft extending vertically toward the bottom of the aeration tank is penetrated in the middle of the cover plate, the upper part of the rotating shaft is transmission-connected with a driving mechanism, the rotating shaft is rotationally connected with the cover plate, a spiral stirring blade extending in a spiral shape is arranged on the periphery of the rotating shaft, a plurality of first aeration holes are arranged at intervals at the bottom edge of the spiral stirring blade, the rotating shaft is a hollow structure, an aeration branch pipe is penetrated in the rotating shaft, an air inlet end of the aeration branch pipe is communicated with one end of a connecting pipe through a dynamic seal, the other end of the connecting pipe is connected with an air outlet end of an aeration fan through an aeration main pipe, the air outlet end of the aeration branch pipe passes through the rotating shaft wall and is communicated with the first aeration hole through an air gap arranged inside the spiral stirring blade, and under the action of the driving mechanism, the rotating shaft can drive the spiral stirring blade to rotate and stir the material in the aeration tank.

[0007] Furthermore, the aeration device for sewage treatment has an aeration disk sleeved on the lower end of the rotating shaft, and second aeration holes are evenly distributed on the top of the aeration disk. The second aeration holes are connected to the outlet ends of the aeration branches through air paths arranged in the aeration disk.

[0008] Furthermore, the aeration device for sewage treatment is provided with a raised guide rail at the bottom of the inner wall of the aeration tank, the guide rail extends along the circumference of the aeration tank, and a positioning groove matching the guide rail is provided on the outer circumferential surface of the aeration disk.

[0009] Furthermore, the aeration device for sewage treatment is provided with a control box and a dissolved oxygen detector on the cover plate, the detection end of the dissolved oxygen detector extends into the aeration tank for online monitoring of the oxygen content in the sewage, the output end of the dissolved oxygen detector is connected to the input end of the control box via a line or a wireless signal, and the output end of the control box is connected to the control end of the driving mechanism and the aeration fan via a line or a wireless signal.

[0010] Furthermore, in the aeration device for sewage treatment, a driving gear is sleeved on the upper part of the rotating shaft, the driving gear is meshed and connected with a transmission gear sleeved on the output end of the servo motor, and a bearing is provided between the rotating shaft and the cover plate.

[0011] Furthermore, the aeration device for sewage treatment is provided with a discharge port at the bottom of the aeration tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model discloses an aeration device for sewage treatment, wherein a cover plate is arranged on the top of the aeration tank, a rotating shaft extending vertically toward the bottom of the aeration tank is penetrated in the middle of the cover plate, the upper part of the rotating shaft is transmission-connected with a driving mechanism, a spiral stirring blade extending in a spiral shape is arranged on the periphery of the rotating shaft, a plurality of first aeration holes are arranged at intervals on the bottom edge of the spiral stirring blade, an aeration disk is sleeved on the lower end of the rotating shaft, second aeration holes are evenly distributed on the top of the aeration disk, an aeration branch pipe is penetrated in the rotating shaft, an air inlet end of the aeration branch pipe is communicated with one end of a connecting pipe through a dynamic sealing member, the other end of the connecting pipe is connected with an air outlet end of an aeration fan through an aeration main pipe, and the outlet of the aeration branch pipe The air end is connected with the first aeration hole and the second aeration hole through the air gap or air path arranged inside the spiral stirring blade and the aeration disk. The aeration fan conveys external air to the inner cavity of the spiral stirring blade and the aeration disk through the aeration main pipe, the connecting pipe and the aeration branch pipe in turn, and sprays the gas into the sewage through the second aeration hole and the first aeration hole, so that the aeration is more uniform. The dissolved oxygen detector monitors the aeration dissolved oxygen content in the sewage through the detection head. The control box adjusts the aeration fan power and the rotation speed of the rotating shaft according to the detection result of the dissolved oxygen detector to ensure that the oxygen content in the sewage is kept within an appropriate range, thereby realizing automatic control of the aeration process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the aeration device of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the aeration device of the utility model;

[0017] In the above figure: 1-aeration tank; 2-cover plate; 3-control box; 4-connecting pipe; 5-rotating shaft; 6-driving gear; 7-transmission gear; 8-dissolved oxygen detector; 9-discharge port; 10-spiral stirring blade; 11-first aeration hole; 12-second aeration hole; 13-aeration plate; 14-guide rail; 15-connecting plate. DETAILED DESCRIPTION

[0018] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0019] The following is combined with Figure 1 and 2 The utility model is an aeration device for sewage treatment, comprising an aeration tank 1, preferably the aeration tank 1 is a hollow cylindrical structure or a structure similar to a hollow cylindrical structure, a cover plate 2 is arranged on the top of the aeration tank 1, a rotating shaft 5 extending vertically to the bottom of the aeration tank 1 is penetrated in the middle of the cover plate 2, the upper part of the rotating shaft 5 is connected to the driving mechanism, a thrust bearing and a roller bearing are arranged between the rotating shaft 5 and the cover plate 2, the thrust bearing and the roller bearing can bear axial and radial loads, and the rotating shaft 5 rotates with the cover plate 2. Dynamic connection, a spiral stirring blade 10 extending in a spiral shape is arranged on the periphery of the rotating shaft 5, and a plurality of first aeration holes 11 are arranged at intervals on the bottom edge of the spiral stirring blade 10. The rotating shaft 5 is a hollow structure, and an aeration branch pipe is passed through the rotating shaft 5. The aeration branch pipe is fixedly arranged in the rotating shaft 5. The air inlet end of the aeration branch pipe is connected with one end of the connecting pipe 4 through a dynamic seal. When the rotating shaft 5 drives the aeration branch pipe to rotate synchronously, the connection between the aeration branch pipe and the connecting pipe 4 can achieve a sealed connection. The other end of the connecting pipe 4 is connected to the air outlet of the aeration fan through the aeration main pipe (the aeration branch pipe, the aeration main pipe and the aeration fan are not shown in the figure). The air outlet of the aeration branch pipe passes through the side wall of the rotating shaft 5 and is connected to the first aeration hole 11 through the air gap arranged inside the spiral stirring blade 10. Under the action of the driving mechanism, the rotating shaft 5 can drive the spiral stirring blade 10 to rotate and stir the material in the aeration tank 1. During operation, the driving mechanism drives the spiral stirring blade 10 to rotate through the rotating shaft 5 to stir the material in the aeration tank 1. Under the combined action of the spiral stirring blade 10, centrifugal force and gravity, the material in the aeration tank 1 produces a cyclic motion, the material between the rotating shaft 5 and the edge of the spiral stirring blade 10 rises, and then the rising material falls from the annular area between the edge of the spiral stirring blade 10 and the inner wall of the aeration tank 1, thereby improving the stirring effect. At the same time, the air introduced from the air outlet of the aeration fan is ejected from the first aeration hole 11 through the aeration main pipe, the connecting pipe 4 and the aeration branch pipe in sequence, and the oxygen in the air is fully in contact with the falling material, and the aeration is more uniform.

[0020] As an optional design, the aeration device for sewage treatment is preferably provided with an aeration disk 13 at the lower end of the rotating shaft 5, and second aeration holes 12 are evenly distributed on the top of the aeration disk 13. The second aeration holes 12 are connected to the outlet ends of the aeration branches through air passages arranged in the aeration disk 13, and the air introduced from the outlet end of the aeration fan is ejected from the second aeration holes 12 in sequence through the aeration main pipe, the connecting pipe 4 and the aeration branch pipe. The oxygen in the air is fully in contact with the material at the bottom of the aeration tank 1, and the aeration is more uniform. It needs to be explained here Preferably, the aeration plate 13 includes an inner plate and an outer plate arranged in concentric circles, and a connecting plate 15 arranged radially is provided between the inner plate and the outer plate, so as to improve the strength of the aeration plate 13 and reduce the weight of the aeration plate 13, and an air path connected to the air outlet end of the aeration branch pipe is provided inside the inner plate, the outer plate and the connecting plate 15, and second aeration holes 12 are evenly distributed on the top of the inner plate, the outer plate and the connecting plate 15, and the gas ejected from the second aeration holes 12 forms convection with the gas ejected from the first aeration holes 11 and fully contacts with the material, so that the aeration effect is better.

[0021] As an optional design, the aeration device for sewage treatment is preferably provided with a raised guide rail 14 at the bottom of the inner wall of the aeration tank 1, and the guide rail 14 extends along the circumference of the aeration tank 1. A positioning groove matching the guide rail 14 is provided on the outer circumferential surface of the aeration plate 13. The aeration plate 13 is positioned by the guide rail 14 and the positioning groove, thereby improving the overall stability of the aeration device of the utility model.

[0022] As an optional design, the aeration device for sewage treatment is preferably provided with a control box 3 and a dissolved oxygen detector 8 on the cover plate 2, a programmable controller PLC is provided in the control box 3, the detection end of the dissolved oxygen detector 8 is extended below the liquid surface of the aeration tank 1, the output end of the dissolved oxygen detector 8 is connected to the input end of the control box 3 via a line or a wireless signal, and the output end of the control box 3 is respectively connected to the control end of the driving mechanism and the aeration fan via a line or a wireless signal. When working, the dissolved oxygen detector 8 monitors the aeration dissolved oxygen content in the sewage through the detection head, and monitors the oxygen content of the sewage in real time. When the oxygen content exceeds the set maximum value, the control The box 3 turns off the aeration fan or reduces the power of the aeration fan through the PLC controller, and reduces the rotation speed of the rotating shaft 5 by commanding the control end of the driving mechanism. When the oxygen content is lower than the set minimum value, the aeration fan is turned on or the power of the aeration fan is increased through the PLC controller, and the rotation speed of the rotating shaft 5 is increased by commanding the control end of the driving mechanism. The aeration fan sequentially conveys external air to the inner cavity of the spiral stirring blade 10 and the aeration disk 13 through the aeration main pipe, the connecting pipe 4 and the aeration branch pipe, and finally sprays the gas into the sewage through the first aeration hole 11 and the second aeration hole 12, thereby increasing the oxygen content in the sewage and realizing automatic control of aeration.

[0023] As an optional design, the aeration device for sewage treatment is preferably provided with a driving gear 6 on the upper part of the rotating shaft 5, and the driving gear 6 is meshed and connected with a transmission gear 7 mounted on the output end of the servo motor (the servo motor is not shown in the figure). It should be noted here that the driving gear 6 and the transmission gear 7 can also be connected by a belt. During operation, the servo motor drives the transmission gear 7 to rotate, and the transmission gear 7 drives the rotating shaft 5 to rotate through the driving gear 6. A thrust bearing and a roller bearing are arranged between the rotating shaft 5 and the cover plate 2. The thrust bearing and the roller bearing can bear axial and radial loads to ensure the overall stability of the aeration device of the utility model.

[0024] As an optional design, the aeration device for sewage treatment is preferably provided with a discharge port 9 at the bottom of the aeration tank 1 to facilitate the discharge of sewage.

[0025] The working process of the utility model is as follows:

[0026] The control box 3 commands the servo motor to start through the PLC controller, and the servo motor drives the transmission gear 7 to rotate. The transmission gear 7 drives the rotating shaft 5 to rotate through the driving gear 6. The rotating shaft 5 drives the spiral stirring blade 10 to rotate and stir the material in the aeration tank 1. Under the combined action of the spiral stirring blade 10, centrifugal force and gravity, the material in the aeration tank 1 produces a cyclic motion, and the material between the rotating shaft 5 and the edge of the spiral stirring blade 10 rises, and then the material falls from the annular area between the edge of the spiral stirring blade 10 and the inner wall of the aeration tank 1, and the stirring is more sufficient. At the same time, the air introduced at the outlet end of the aeration fan is ejected from the first aeration hole 11 and the second aeration hole 12 through the aeration main pipe, the connecting pipe 4 and the aeration branch pipe in turn. The oxygen in the air is fully in contact with the falling material, and the aeration is more uniform. The dissolved oxygen detector 8 is detected by the detection head. Monitor the aerated dissolved oxygen content in the sewage, and monitor the oxygen content of the sewage in real time. When the oxygen content in the sewage exceeds the set maximum value, the control box 3 turns off the aeration fan or reduces the power of the aeration fan through the PLC controller, and reduces the rotation rate of the rotating shaft 5 through the command drive mechanism control end. When the oxygen content is lower than the set minimum value, the aeration fan is turned on or the power of the aeration fan is increased through the PLC controller, and the rotation rate of the rotating shaft 5 is increased through the command drive mechanism control end. The aeration fan sequentially transports external air to the inner cavity of the spiral stirring blade 10 and the aeration disk 13 through the aeration main pipe, the connecting pipe 4 and the aeration branch pipe, and sprays gas into the sewage through the second aeration hole 12 and the first aeration hole 11, ensuring that the oxygen content in the sewage is kept within a suitable range, thereby realizing automatic control of the aeration process.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. An aeration device for sewage treatment, comprising an aeration tank, characterized in that: A cover plate is provided on the top of the aeration tank, and a rotating shaft extending vertically toward the bottom of the aeration tank is penetrated in the middle of the cover plate, the upper part of the rotating shaft is transmission-connected to the driving mechanism, the rotating shaft is rotationally connected to the cover plate, a spiral stirring blade extending in a spiral shape is provided on the periphery of the rotating shaft, and a plurality of first aeration holes are spaced apart at intervals at the bottom edge of the spiral stirring blade. The rotating shaft is a hollow structure, and an aeration branch pipe is penetrated in the rotating shaft, the air inlet end of the aeration branch pipe is connected to one end of the connecting pipe through a dynamic seal, and the other end of the connecting pipe is connected to the air outlet end of the aeration fan through the aeration main pipe, and the air outlet end of the aeration branch pipe passes through the rotating shaft wall and is connected to the first aeration hole through an air gap provided inside the spiral stirring blade. Under the action of the driving mechanism, the rotating shaft can drive the spiral stirring blade to rotate and stir the material in the aeration tank.

2. The aeration device for sewage treatment according to claim 1 is characterized in that: The lower end of the rotating shaft is sleeved with an aeration disk, and second aeration holes are evenly distributed on the top of the aeration disk. The second aeration holes are connected with the outlet ends of the aeration branches through air passages arranged in the aeration disk.

3. The aeration device for sewage treatment according to claim 2, characterized in that: A guide rail with a raised shape is provided at the bottom of the inner wall of the aeration tank. The guide rail extends along the circumference of the aeration tank. A positioning groove matching the guide rail is provided on the outer circumferential surface of the aeration plate.

4. The aeration device for sewage treatment according to any one of claims 1 to 3, characterized in that: A control box and a dissolved oxygen detector are arranged on the cover plate. The detection end of the dissolved oxygen detector extends into the aeration tank for online monitoring of the oxygen content in the sewage. The output end of the dissolved oxygen detector is connected to the input end of the control box through a line or a wireless signal, and the output end of the control box is connected to the control end of the driving mechanism and the aeration fan through a line or a wireless signal.

5. The aeration device for sewage treatment according to claim 4 is characterized in that: A driving gear is sleeved on the upper part of the rotating shaft, and the driving gear is meshed and connected with a transmission gear sleeved on the output end of the servo motor. A bearing is arranged between the rotating shaft and the cover plate.

6. The aeration device for sewage treatment according to claim 4, characterized in that: A discharge port is arranged at the bottom of the aeration tank.

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