Aeration device for sewage treatment and sewage treatment process

Abstract

The present application belongs to the technical field of sewage treatment equipment, and particularly relates to a sewage treatment aeration device and a sewage treatment process. The sewage treatment aeration device comprises a sewage tank, a hollow shaft rotatably connected in the sewage tank, a motor fixedly installed at the top of the sewage tank and coaxially fixedly connected with the hollow shaft, aeration pipes fixedly and communicatively connected on the hollow shaft at equal intervals in the circumferential direction, a bubble crushing assembly arranged outside the aeration pipes, and a cleaning assembly arranged outside the bubble crushing assembly. The device is provided with annular scrapers sleeved outside the aeration pipe body. During operation, the annular scrapers can reciprocally move outside the pipe body to scrape off sludge or sewage impurities that may exist outside the aeration pipe in real time, so that the aeration pipe will not be blocked during work.

Description

Technical Field

[0001] This invention belongs to the technical field of sewage treatment equipment, and particularly relates to an aeration device and sewage treatment process for sewage treatment. Background Technology

[0002] Wastewater refers to water generated from various domestic, industrial, agricultural, and urban activities, containing various wastes, organic matter, chemicals, microorganisms, and suspended solids. The composition of wastewater is complex, including organic matter, suspended solids, chemicals, and microorganisms. These components may pose potential threats to the environment and human health. Direct discharge of wastewater into the environment will pollute water bodies, soil, and air. Therefore, existing wastewater discharge facilities typically require wastewater treatment to protect the environment and human health.

[0003] Activated sludge process is a commonly used wastewater treatment technology. Its basic principle is to utilize activated sludge containing a large number of microorganisms to degrade organic matter in wastewater. For example, the A / O process is an activated sludge wastewater treatment process that connects anaerobic and aerobic stages in series. A represents the anaerobic stage, whose main function is to break down cellulose and recalcitrant large organic molecules in the influent into smaller molecules, namely bioavailable BOD, thereby improving the biodegradability of the wastewater. The effluent then enters the aerobic stage O. In this stage, oxygen acts as the electron acceptor, and the BOD produced in the anaerobic stage acts as the electron donor for aerobic respiration. Therefore, continuous aeration of the wastewater is required in the aerobic stage O to meet treatment needs.

[0004] In existing technologies, high-pressure gas generated by an air pump is generally used to spray bubbles into the water, thereby fully dissolving the gas in the water. Aeration devices typically also include mechanical stirring equipment or a water pump to thoroughly mix the gas into the water. For example, Chinese utility model patent CN218321017U discloses an anti-clogging sewage treatment aeration tank, including an aeration tank body and a connecting cylinder movably disposed in front of the aeration tank body. A fixing body is fixedly installed at the front end of the aeration tank body, and a first fixing cylinder is fixedly installed through the front end and inner wall of the front end of the aeration tank body. A water outlet cylinder is threaded onto the inner wall of the first fixing cylinder. A first groove is fixedly opened at the right end of the fixing body, and an electric cylinder is fixedly installed on the inner wall of the first groove. A fixing column is fixedly installed at the front end of the telescopic rod of the electric cylinder. The inlet and outlet of this aeration tank have an anti-clogging structure, which can prevent clogging of the inlet and outlet of the aeration tank.

[0005] However, in actual use, although the device can clear blockages in the inlet and outlet pipes, it lacks a structure for real-time cleaning of the aeration heads, and blockages in the sewage treatment process often occur at the aeration ports.

[0006] In summary, there is a current need for an aeration device for wastewater treatment that can clean the aeration ports in real time. Summary of the Invention

[0007] The purpose of this invention is to provide an aeration device and a wastewater treatment process for wastewater treatment. The device uses an annular scraper fitted onto the outside of the aeration pipe. During operation, the annular scraper reciprocates on the outside of the pipe, scraping away any sludge or wastewater impurities that may be present on the outside of the aeration pipe in real time, ensuring that the aeration pipe does not become blocked during operation.

[0008] The technical solution adopted by the present invention to solve the above problems is: an aeration device for sewage treatment, comprising:

[0009] The wastewater tank includes a hollow shaft rotatably connected inside the wastewater tank, a motor fixedly installed on the top of the wastewater tank and coaxially fixedly connected to the hollow shaft, an aeration pipe circumferentially fixedly connected to the hollow shaft at equal intervals, a bubble pulverizing component set outside the aeration pipe, and a cleaning component set outside the bubble pulverizing component.

[0010] A "rotational connection" typically refers to a connection method that allows for rotational movement. This type of connection allows two or more components to be connected in a specific way, enabling them to rotate relative to each other without separating. Rotational connections can employ various designs and mechanisms, such as bearings, pins, and universal joints.

[0011] Here, "setting up" means that component A is placed or mounted at a specific location or on a surface of component B to ensure the connection and function between the two. This may involve using bolts, nuts, welding, adhesive, or other connection methods to make component A and component B fit together tightly and be able to work together. Setting up may also include making adjustments or calibrating the gaps or relative positions between component A and component B to ensure they can work together and achieve the desired function.

[0012] The bubble pulverizing assembly includes a sleeve rotatably connected to the outside of the aeration pipe, a transmission chamber fixedly connected to a hollow shaft via a connecting plate, a first bevel gear rotatably connected to the inside of the transmission chamber and fixedly connected to the sleeve coaxially via a rotating shaft, a second bevel gear rotatably connected to the inside of the transmission chamber and meshing with the first bevel gear, a gear disc fixedly connected to the second bevel gear coaxially, and a gear ring fixedly connected inside the sewage tank and meshing with the gear disc.

[0013] A "coaxial connection" refers to the alignment of the axes (usually cylindrical) of two or more components along the same straight line, allowing them to share the same axis. This type of connection is commonly used to transmit rotational motion or power because a coaxial connection ensures alignment between the axes of rotating parts, thereby enabling efficient energy and motion transmission. In mechanical systems, coaxial connections are typically achieved through bearings, couplings, or other connecting components to ensure alignment and coordinated operation between rotating parts.

[0014] The cleaning assembly includes a reciprocating screw rotatably connected above the sleeve, an annular scraper sleeved outside the sleeve and threadedly connected to the reciprocating screw, a first gear disc fixedly sleeved outside one side of the reciprocating screw, and a second gear disc fixedly sleeved outside the rotating shaft and meshing with the first gear disc.

[0015] An air pump is fixedly installed at the bottom of the sewage tank, and the air outlet of the air pump is connected to a hollow shaft through a rotary connector.

[0016] A further preferred technical solution is that a stirring rod is provided on the side of the hollow shaft.

[0017] A further preferred technical solution is that: the top of the sewage tank is provided with a water inlet pipe, and the bottom of the sewage tank is provided with a drain pipe.

[0018] In this context, "top" typically refers to the uppermost or highest point of a component, while "bottom" refers to the lowermost or lowest point. These terms are usually used to describe the relative position of components, requiring a reference point. Generally, the ground is used as the reference point, with the part closer to the ground called the bottom and the part farther from the ground called the top.

[0019] A further preferred technical solution is that: the aeration pipe has an aeration port on its side, and the sleeve has a through hole on its side corresponding to the position of the aeration port.

[0020] A further preferred technical solution is that the diameter of the through hole is smaller than the diameter of the aeration port.

[0021] A further preferred technical solution is that the inner side of the annular scraper is provided with a scraping surface for abutting against the outer side of the sleeve.

[0022] A further preferred technical solution is that: the lower side of the sleeve is provided with a guide rod for slidingly connecting the annular scraper.

[0023] A further preferred technical solution is that the material of the sewage tank includes one of concrete, steel or fiberglass.

[0024] A further preferred technical solution is that the aeration pipe material includes one of plastic, rubber or metal materials.

[0025] The wastewater treatment process using an aeration device in any of the above schemes includes the following steps:

[0026] S1. Start the air pump to inject air into the aeration pipe;

[0027] S2. Add the wastewater to be treated into the wastewater tank;

[0028] S3. Start the motor to make the aeration pipe start rotating;

[0029] S4. After the wastewater treatment is completed, turn off the motor so that the aeration pipe stops rotating;

[0030] S5. Discharge the treated wastewater from the wastewater tank;

[0031] S6. Turn off the air pump and stop injecting air into the aeration pipe.

[0032] A further preferred technical solution is:

[0033] In summary, the present invention has the following advantages:

[0034] 1. This invention uses a motor to drive a hollow shaft to rotate, which in turn drives the aeration pipe to rotate, thereby reducing the existence of dead zones in aeration. At the same time, the gear disc also rotates synchronously with the aeration pipe. Through the meshing of the gear disc and the gear ring, as well as the meshing of the first bevel gear and the second bevel gear, the sleeve can be driven to rotate outside the aeration pipe. This reduces the amount of impurities and dirt in the sewage adhering to the sleeve, thus preventing blockage. Furthermore, the meshing of the first and second gear discs also drives the reciprocating screw to rotate. The rotation of the reciprocating screw drives the annular scraper to move horizontally outside the sleeve, thereby scraping away impurities and dirt on its surface in a timely manner, further improving the anti-clogging effect. It is highly practical. The added stirring rod can agitate the sewage to prevent the sedimentation of impurities and dirt in the sewage.

[0035] 2. Because the large volume of air ejected after spraying out will form large bubbles in the water, it will affect the mixing of sewage and air. In this invention, during the rotation of the sleeve, the bubbles ejected from the aeration port will be cut and broken into smaller bubbles, thereby improving the mixing effect of air and sewage. Furthermore, the stirring rod will agitate the sewage, which will further improve the mixing capacity of air and sewage, effectively ensuring the aeration treatment effect of sewage. Attached Figure Description

[0036] Figure 1 This is a longitudinal section three-dimensional structural diagram of the present invention;

[0037] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0038] Figure 3 This is a schematic diagram of the longitudinal section of the transmission chamber of the present invention;

[0039] Figure 4 This is a longitudinal sectional view of the connection structure of the sleeve and aeration pipe of the present invention.

[0040] In the attached diagram, the components represented by each number are as follows: 1. Sewage tank; 2. Hollow shaft; 3. Motor; 4. Aeration pipe; 5. Air pump; 6. Stirring rod; 101. Sleeve; 102. Transmission chamber; 103. First bevel gear; 104. Second bevel gear; 105. Gear disc; 106. Gear ring; 201. Reciprocating screw; 202. Annular scraper; 203. First gear disc; 204. Second gear disc; 1001. Aeration port; 1002. Through hole. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0043] Please combine Figure 1-4 This embodiment of an aeration device for wastewater treatment includes a wastewater tank 1. The interior of the wastewater tank 1 is made of concrete, steel, or fiberglass to withstand the weight and pressure of the wastewater. The wastewater tank 1 includes an inlet, an outlet, and an exhaust port for the inflow and outflow of wastewater and the discharge of gas during the treatment process. A hollow shaft 2 is rotatably connected inside the wastewater tank 1. The hollow shaft 2 has an outer shell and an internal cavity. The outer shell is the external enclosure structure of the hollow shaft and is usually made of metal to provide protection and support. The outer shell can be designed in different shapes and sizes to adapt to different engineering needs. The interior of the hollow shaft 2 is a hollow structure forming an internal cavity, a design that allows air to circulate within the hollow shaft 2.

[0044] Motor 3 is fixedly mounted on top of sewage tank 1 and coaxially connected to hollow shaft 2. Motor 3 includes a housing, stator, rotor, bearings, and terminals. The housing, typically made of metal, provides protection and support while also aiding in heat dissipation. The stator consists of electromagnetic coils and an iron core. When current flows through the stator coils, a magnetic field is generated, creating an electromagnetic interaction with the rotor and driving its rotation. The rotor, usually composed of an iron core and coils, rotates through its electromagnetic interaction with the stator, converting electrical energy into mechanical energy. Bearings support the rotor, ensuring its stability and balance during rotation. Terminals connect to an external power supply and control system to enable functions such as motor start, stop, and speed regulation.

[0045] Aeration pipes 4 are circumferentially fixed and connected to hollow shaft 2 at equal intervals. Aeration pipe 4 includes a pipe body, connecting joints, and aeration ports 1001. The pipe body is typically made of plastic, rubber, or metal, possessing a certain degree of flexibility and corrosion resistance, and is used to transport gas and withstand the working pressure of the aeration system. Aeration ports 1001 are equidistantly located on the pipe body to uniformly release gas into the water. Multiple aeration ports 1001 are typically provided to increase the contact area between the gas and water. The connecting joints are used to connect the pipe body to the air supply equipment, such as the hollow shaft 2 already connected to the air pump 5.

[0046] The bubble pulverizing component is located outside the aeration pipe 4, and a cleaning component is also installed outside the bubble pulverizing component. An air pump 5 is fixedly installed at the bottom of the wastewater tank 1. The air pump 5 includes a housing, a motor, a compressor, an inlet / outlet, and a control device. The housing, serving as the outer casing of the air pump, is typically made of metal or plastic to provide protection and support, while also helping to reduce noise and dissipate heat. The motor is the pressure device that drives the air pump, typically using an electric motor or a pneumatic motor. The compressor is the core component of the air pump, used to compress and transport gas, and typically includes components such as a cylinder, piston, and valves. The inlet / outlet is used to draw in and discharge gas, and is typically equipped with valves and connection interfaces for connecting pipelines and other equipment. The control device is used to monitor and control the operating status of the air pump, and typically includes components such as switches, sensors, and a control panel.

[0047] The air outlet of the air pump 5 is connected to the hollow shaft 2 via a rotating connector, which facilitates the supply of air to the sewage tank 1. The top of the sewage tank 1 is fixedly connected to an inlet pipe connected to the inlet, and the lower back of the sewage tank 1 is fixedly connected to a drain pipe connected to the outlet, which facilitates the injection of sewage into the sewage tank 1 and the discharge of sewage from the sewage tank 1.

[0048] The bubble pulverizing assembly includes a sleeve 101 rotatably connected to the outside of the aeration pipe 4, a transmission chamber 102 fixedly connected to the hollow shaft 2 via a connecting plate, a first bevel gear 103 rotatably connected inside the transmission chamber 102 and fixedly coaxially with the sleeve 101 via a rotating shaft, a second bevel gear 104 rotatably connected inside the transmission chamber 102 and meshing with the first bevel gear 103, a gear disc 105 fixedly coaxially connected with the second bevel gear 104, and a gear ring 106 fixedly connected inside the sewage tank 1 and meshing with the gear disc 105. Aeration ports 1001 are equidistantly opened at the top of the aeration pipe 4, and through holes 1002 are uniformly opened on the outside of the sleeve 101. The diameter of the through holes 1002 is smaller than the diameter of the aeration ports 1001, facilitating the pulverization of large bubbles into smaller bubbles. The positions of the through holes 1002 correspond to the positions of the aeration ports 1001, facilitating air discharge.

[0049] The cleaning assembly includes a reciprocating screw 201 rotatably connected above the sleeve 101, an annular scraper 202 sleeved outside the sleeve 101 and threadedly connected to the reciprocating screw 201, a first gear disk 203 fixedly sleeved on one side of the reciprocating screw 201, and a second gear disk 204 fixedly sleeved outside the rotating shaft and meshing with the first gear disk 203. The annular scraper 202 contacts the surface of the sleeve 101, facilitating cleaning of the sleeve 101 surface. A guide rod is fixedly connected to the lower part of the sleeve 101 and slidably connected to the annular scraper 202, guiding the horizontal movement of the annular scraper 202. The reciprocating screw 201 is a type of screw that enables the slider to reciprocate without changing the direction of rotation of the main shaft. It features two threaded grooves with the same pitch but opposite directions, connected at both ends by a transition curve. The rotation of the screw causes the side of the helical groove to push the slider placed within the helical groove to perform axial reciprocating motion.

[0050] The implementation principle of an aeration device for sewage treatment in this embodiment is as follows: Sewage is injected into the sewage tank 1 through the inlet pipe. The air pump 5 is started to supply air into the hollow shaft 2. The air is finally discharged through the aeration port 1001 on the aeration pipe 4 to aerate the sewage. The motor 3 is started, which drives the hollow shaft 2 to rotate. The rotation of the hollow shaft 2 drives the aeration pipe 4 to rotate together, thereby reducing the existence of aeration dead zones. At the same time, the gear disc 105 also moves in a circular motion synchronously with the aeration pipe 4. Under the meshing action of the gear disc 105 and the gear ring 106, and the meshing action of the first bevel gear 103 and the second bevel gear 104, the sleeve 101 can be driven outside the aeration pipe 4. The sleeve 101 rotates, reducing the amount of impurities and dirt in the sewage adhering to it and preventing blockage. The meshing of the first gear disc 203 and the second gear disc 204 also drives the reciprocating screw 201 to rotate. This rotation causes the annular scraper 202 to move horizontally outside the sleeve 101, effectively scraping away impurities and dirt from its surface and further improving the anti-clogging effect. During rotation, the sleeve 101 also cuts and breaks down the air bubbles ejected from the aeration port 1001 into smaller bubbles, improving the mixing of air and sewage. Finally, the sewage is discharged through the drain pipe.

[0051] Example 2

[0052] This embodiment, based on Embodiment 1, further improves upon the following: A stirring rod 6 is equidistantly and circumferentially fixedly connected to the outside of the hollow shaft 2. The stirring rod 6 is used to stir and mix wastewater and has several stirring columns arranged in a ring to achieve an effective stirring effect. Preferably, the stirring columns can be arranged vertically in multiple layers to achieve stirring of wastewater at each level. This not only agitates the wastewater to prevent impurities and dirt from settling, but also improves the mixing effect of air and wastewater.

[0053] Example 3

[0054] As in either Example 1 or Example 2, the wastewater treatment process of the aeration device for wastewater treatment includes the following steps:

[0055] S1. Start the air pump 5 and inject air into the aeration pipe 4;

[0056] S2. Add the wastewater to be treated into the wastewater tank 1;

[0057] S3. Start the motor 3, so that the aeration pipe 4 begins to rotate;

[0058] S4. After the sewage treatment is completed, turn off the motor 3 so that the aeration pipe 4 stops rotating;

[0059] S5. Discharge the treated wastewater from the wastewater tank 1;

[0060] S6. Turn off the air pump 5 and stop injecting air into the aeration pipe 4.

[0061] In step S1, injecting air first prevents impurities in the wastewater injected in step S2 from directly entering the aeration pipe. Then, starting motor 3 allows the aeration pipe 4 to rotate, repeatedly cleaning any remaining impurities that might be clogging the aeration holes on the outer side of the pipe via the annular scraper 202. After the wastewater treatment is complete, the wastewater is discharged first, and then air pump 5 is turned off, allowing any impurities that may be inside the aeration pipe to be discharged through the high-pressure gas output by air pump 5, further cleaning the aeration pipe 4.

[0062] Furthermore, the same or similar element symbols are used as far as possible in the accompanying drawings and description to refer to the same or similar parts or steps. The drawings are presented in a simplified form and are not drawn to scale. For convenience and clarity only, directional terms such as top, bottom, left, right, upward, above, above, below, behind, and front may be used to refer to the drawings. These and similar directional terms should not be construed as limiting the scope of this disclosure in any way.

Claims

1. An aeration device for wastewater treatment, characterized in that, include: Wastewater tank (1), hollow shaft (2) rotatably connected inside the wastewater tank (1), motor (3) fixedly installed on the top of the wastewater tank (1) and coaxially fixedly connected to the hollow shaft (2), aeration pipe (4) equidistantly circumferentially fixedly connected to the hollow shaft (2), bubble crushing component set outside the aeration pipe (4), and cleaning component set outside the bubble crushing component. The bubble pulverizing assembly includes a sleeve (101) rotatably connected to the outside of the aeration pipe (4), a transmission chamber (102) fixedly connected to the hollow shaft (2) via a connecting plate, a first bevel gear (103) rotatably connected to the inside of the transmission chamber (102) and fixedly connected to the sleeve (101) coaxially via a rotating shaft, a second bevel gear (104) rotatably connected to the inside of the transmission chamber (102) and meshing with the first bevel gear (103), a gear disc (105) fixedly connected to the second bevel gear (104) coaxially, and a gear ring (106) fixedly connected to the inside of the sewage tank (1) and meshing with the gear disc (105). The cleaning assembly includes a reciprocating screw (201) rotatably connected above the sleeve (101), an annular scraper (202) sleeved outside the sleeve (101) and threadedly connected to the reciprocating screw (201), a first gear disk (203) fixedly sleeved outside one side of the reciprocating screw (201), and a second gear disk (204) fixedly sleeved outside the rotating shaft and meshing with the first gear disk (203). An air pump (5) is fixedly installed at the bottom of the sewage tank (1). The air outlet of the air pump (5) is connected to the hollow shaft (2) through a rotating connector. A stirring rod (6) is provided on the side of the hollow shaft (2). A water inlet pipe is provided at the top of the sewage tank (1), and a drain pipe is provided at the bottom of the sewage tank (1). An aeration port (1001) is provided on the side of the aeration pipe (4), and a through hole (1002) corresponding to the position of the aeration port (1001) is provided on the side of the sleeve (101). The diameter of the through hole (1002) is smaller than the diameter of the aeration port (1001).

2. The aeration device for wastewater treatment according to claim 1, characterized in that, The inner side of the annular scraper (202) is provided with a scraping surface for abutting against the outer side of the sleeve (101).

3. The aeration device for wastewater treatment according to claim 1, characterized in that, The lower side of the sleeve (101) is provided with a guide rod for sliding connection of the annular scraper (202).

4. The aeration device for wastewater treatment according to claim 1, characterized in that, The wastewater tank (1) is made of one of the following materials: concrete, steel or fiberglass.

5. An aeration device for wastewater treatment according to claim 1, characterized in that, The aeration pipe (4) is made of one of the following materials: plastic, rubber or metal.

6. The wastewater treatment process of the aeration device for wastewater treatment as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Start the air pump (5) to inject air into the aeration pipe (4); S2. Add the wastewater to be treated into the wastewater tank (1); S3. Start the motor (3) to make the aeration pipe (4) start rotating; S4. After the sewage treatment is completed, turn off the motor (3) so that the aeration pipe (4) stops rotating; S5. Discharge the treated wastewater from the wastewater tank (1); S6. Turn off the air pump (5) and stop injecting air into the aeration pipe (4).

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