Sewage treatment equipment capable of cleaning aeration disc

Abstract

The invention discloses sewage treatment equipment capable of cleaning an aeration disc, the sewage treatment equipment comprises a walking vehicle arranged at the top of a sewage pool and a water collecting pool arranged outside the sewage pool, the walking vehicle moves along the pool wall of the sewage pool, the walking vehicle comprises a transverse pipeline, a vertical pipeline and a drainage pipeline, and the vertical pipeline and the aeration disc in the sewage pool are arranged in parallel; the bottom end of the vertical pipeline is fixedly provided with a sewage suction chassis capable of covering the aeration disc, and a rotating shaft seal capable of sealing the opening is horizontally arranged in the vertical pipeline; a movable baffle abutting against the top face of the aeration disc is arranged in the sewage suction chassis, a spring is connected between the movable baffle and the sewage suction chassis, a jacking column is arranged at the top of the movable baffle, and when the movable baffle moves upwards, the jacking column jacks the rotating shaft seal open, so that the rotating shaft seal rotates around the torsional spring. The invention aims to provide the sewage treatment equipment capable of efficiently cleaning sludge on the surface of the aeration disc in real time in a normal operation state of a sewage treatment system.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, and particularly to a sewage treatment equipment capable of cleaning an aeration disc. Background Art

[0002] In the existing sewage treatment process, the aeration disc is one of the core components, which promotes the degradation of activated sludge by supplying oxygen to the sewage. However, during the long-term operation, impurities such as sludge and biofilm will gradually adhere to the surface of the aeration disc. Due to the accumulation of sludge on the surface of the aeration disc, the air holes of the aeration disc will be blocked, or the oxygen transmission efficiency will be reduced, or even completely fail, thus affecting the effect of the entire sewage treatment.

[0003] At present, the common methods for cleaning the aeration disc in the sewage treatment industry mainly include: manual cleaning and chemical cleaning. Manual cleaning requires shutting down the machine and emptying the tank body, which not only affects the continuity of the system, but also brings high labor costs and safety risks; although the chemical cleaning method can effectively remove the deposits, due to the use of chemicals, it will increase the environmental burden and requires regular maintenance, and it still cannot completely avoid shutting down the machine. When solving the above problems, mechanical cleaning equipment usually needs to work after shutting down or emptying, and still cannot meet the requirements of continuous operation and low-cost maintenance. Therefore, there is an urgent need for a sewage treatment equipment that can clean the sludge on the surface of the aeration disc in real time and efficiently under the normal operation state of the sewage treatment system. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above deficiencies in the prior art, and aims to provide a sewage treatment equipment that can clean the sludge on the surface of the aeration disc in real time and efficiently under the normal operation state of the sewage treatment system.

[0005] To achieve the above purpose, the technical solution of the present invention is realized as follows:

[0006] A sewage treatment device with a cleanable aeration disk, comprising a walking vehicle arranged on the top of a sewage tank and a collecting tank arranged outside the sewage tank. The walking vehicle moves along the pool wall of the sewage tank. The walking vehicle includes a horizontal pipeline, a vertical pipeline and a drainage pipeline. The drainage pipeline extends into the collecting tank and is communicated with one end of the horizontal pipeline. The horizontal pipeline is provided with a water inlet at the other end. The vertical pipelines are arranged side by side with the aeration disks in the sewage tank. The tops of the vertical pipelines are communicated with the horizontal pipeline. A sewage suction chassis capable of covering above the aeration disk is fixedly arranged at the bottom end of the vertical pipeline. The sewage suction chassis has an opening communicated with the vertical pipeline. A rotating shaft seal capable of closing the opening is horizontally arranged in the vertical pipeline. One side of the rotating shaft seal is connected with the inner wall of the vertical pipeline through a torsion spring for resetting after the rotating shaft seal is opened. A limiting member for clamping on the upper side of the torsion spring is arranged on the inner wall of the vertical pipeline. An active baffle against the top surface of the aeration disk is arranged in the sewage suction chassis. A spring in a compressed state is connected between the active baffle and the sewage suction chassis. A top column is arranged at the top of the active baffle. When the active baffle moves upward, the top column pushes the rotating shaft seal open, so that the rotating shaft seal rotates around the torsion spring. An inlet pipe and a drain pipe are arranged on the collecting tank.

[0007] Further, rubber wheels moving on the top of the pool wall of the sewage tank are arranged on both sides of the walking vehicle, and each rubber wheel is equipped with a driving motor.

[0008] Further, the height of the collecting tank is lower than that of the sewage tank, and the bottom end of the drainage pipeline is lower than the bottom end of the aeration disk.

[0009] Further, a control valve is arranged inside the drainage pipeline, and the top of the drainage pipeline is connected with the horizontal pipeline through a flange.

[0010] Further, the active baffle is of an annular structure. There is at least a 1 cm interval between the top end of the active baffle and the sewage suction chassis, and the bottom of the active baffle extends 2 - 4 cm out of the sewage suction chassis.

[0011] Further, a sealing ring is arranged between the bottom end of the active baffle and the sewage suction chassis.

[0012] Further, both the horizontal pipeline and the vertical pipeline are made of stainless steel pipes, and the vertical pipeline is connected with the horizontal pipeline through a tee joint.

[0013] Further, a water inlet valve is arranged on the inlet pipe, a drain valve is arranged on the drain pipe. Both the water inlet valve and the drain valve are electric valves, and a liquid level gauge is arranged in the collecting tank.

[0014] It also includes a sewage treatment system, comprising a sewage treatment device with a cleanable aeration disk as described in any one of the above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention can automatically and online clean the aeration discs at the bottom of the pool during the continuous operation of the sewage treatment system, without stopping the machine for drainage or manual entry into the pool, significantly improving the continuous treatment capacity of the system, reducing the interference of maintenance to production, and effectively avoiding the downtime and manual risks caused by manual cleaning. The cooperation of the sewage suction chassis and the shaft seal eliminates the need for electronic sensors and complex control systems. After the movable baffle contacts the aeration disc, the shaft seal can be triggered to open for sludge adsorption. The structure is simple, the action response is stable, greatly improving the operation reliability and adaptability of the equipment, while reducing the system failure risk and ensuring long-term efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is Figure 1 an enlarged view of part A in

[0019] Figure 3 is Figure 1 an enlarged view of part B in

[0020] Figure 4 is a side view of the walking vehicle in the present invention;

[0021] Figure 5 is a top view of the sewage suction chassis in the present invention.

[0022] DESCRIPTION OF THE REFERENCE NUMERALS:

[0023] 1 - sewage pool, 2 - walking vehicle, 3 - collecting pool, 4 - aeration disc, 5 - aeration pipe, 11 - pool wall, 21 - rubber wheel, 22 - driving motor, 23 - horizontal pipe, 24 - water inlet, 25 - vertical pipe, 26 - sewage suction chassis, 27 - drainage pipe, 28 - control valve, 29 - tee joint, 31 - water inlet pipe, 32 - drain pipe, 33 - water inlet valve, 34 - drain valve, 35 - liquid level gauge, 251 - shaft seal, 252 - limiting member, 253 - torsion spring, 261 - movable baffle, 262 - ejector pin, 263 - spring, 271 - flange. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0025] As Figures 1 to 5As shown in the figure, a sewage treatment device capable of cleaning an aeration disc includes a traveling vehicle 2 arranged on the top of a sewage tank 1 and a collecting tank 3 arranged outside the sewage tank 1. The traveling vehicle 2 moves along the pool wall 11 of the sewage tank 1. The traveling vehicle 2 includes a horizontal pipe 23, a vertical pipe 25, and a drainage pipe 27. The drainage pipe 27 extends into the collecting tank 3 and communicates with one end of the horizontal pipe 23. The horizontal pipe 23 is provided with a water inlet 24 at the other end. The vertical pipes 25 are arranged in parallel with the aeration discs 4 in the sewage tank 1, and the tops of the vertical pipes 25 communicate with the horizontal pipe 23. A sewage suction chassis 26 capable of covering above the aeration disc 4 is fixedly arranged at the bottom end of the vertical pipe 25. The sewage suction chassis 26 has an opening communicating with the vertical pipe 25. A rotating shaft seal 251 capable of closing the opening is horizontally arranged in the vertical pipe 25. One side of the rotating shaft seal 251 is connected to the inner wall of the vertical pipe 25 through a torsion spring 253 that resets after the rotating shaft seal 251 is opened. A limiting member 252 that catches on the upper side of the torsion spring 253 is arranged on the inner wall of the vertical pipe 25. A movable baffle 261 pressing against the top surface of the aeration disc 4 is arranged in the sewage suction chassis 26. A spring 263 in a compressed state is connected between the movable baffle 261 and the sewage suction chassis 26. A top post 262 is arranged at the top of the movable baffle 261. When the movable baffle 261 moves upward, the top post 262 pushes open the rotating shaft seal 251, causing the rotating shaft seal 251 to rotate around the torsion spring 253. A water inlet pipe 31 and a drainage pipe 32 are arranged on the collecting tank 3.

[0026] Among them, rubber wheels 21 that move on the top of the pool wall 11 of the sewage tank 1 are arranged on both sides of the traveling vehicle 2. Each rubber wheel 21 is equipped with a driving motor 22. The frames of the rubber wheels 21 and the driving motors 22 are both connected to the horizontal pipe 23. The traveling vehicle 2 is supported by the rubber wheels 21 and driven by the driving motors 22, so that the traveling vehicle 2 moves on the top of the pool wall 11. The aeration discs 4 in the sewage tank 1 can be arranged in multiple columns, and each column of aeration discs 4 corresponds to a vertical pipe 25 and a sewage suction chassis 26. Through multiple groups of vertical pipes 25 and sewage suction chassis 26 carried by the traveling vehicle 2, this device can successively cover all the aeration discs 4 at the bottom of the pool, realize round-trip operation, and the cleaning frequency can be flexibly adjusted according to the sludge concentration, greatly saving labor and improving operation safety, especially suitable for environments such as deep pool bodies where manual operation is not suitable.

[0027] Among them, the height of the collecting tank 3 is lower than that of the sewage tank 1, and the bottom end of the drainage pipe 27 is lower than the bottom end of the aeration disc 4. The collecting tank 3 being lower than the sewage tank 1 can facilitate the liquid level in the collecting tank 3 to remain lower than the liquid level in the sewage tank 1. When the outlet of the drainage pipe 27 is lower than the bottom end of the aeration disc 4, a siphon effect can be formed by opening the rotating shaft seal 251, sucking the water in the sewage tank 1 into the collecting tank 3.

[0028] Among them, a control valve 28 is arranged inside the drain pipe 27, and the top of the drain pipe 27 is connected to the horizontal pipe 23 through a flange 271. Both the horizontal pipe 23 and the vertical pipe 25 are made of stainless steel pipes, and the vertical pipe 25 is connected to the horizontal pipe 23 through a tee joint 29. In this embodiment, the control valve 28 is preferably arranged at a position 5-20 cm above the bottom end of the drain pipe 27, and the control valve 28 is used to adjust the opening and closing and flow rate of the drain pipe 27. The horizontal pipe 23, the vertical pipe 25 and the drain pipe 27 are connected into one body through the flange 271 and the tee joint 29, so that the overall pipeline system adopts a detachable structure, which is convenient for later maintenance, repair or replacement, and enhances the maintainability of the equipment.

[0029] Among them, the movable baffle 261 is of an annular structure, and there is at least a 1 cm gap between the top end of the movable baffle 261 and the sewage suction chassis 26, which is used to provide space for installing the spring 263 and reserve the compression stroke of the spring 263. The bottom of the movable baffle 261 extends 2-4 cm below the bottom of the sewage suction chassis 26, which can ensure that there is a gap height between the sewage suction chassis 26 and the aeration disc 4 when the sewage suction chassis 26 covers the aeration disc 4. Therefore, when the vertical pipe 25 is opened, a negative pressure suction range larger than the aeration disc 4 can be formed around the sewage suction chassis 26, effectively stripping the attached sludge.

[0030] Among them, a sealing ring is arranged between the bottom end of the movable baffle 261 and the sewage suction chassis 26. The sealing ring seals the gap between the sewage suction chassis 26 and the movable baffle 261 to form a local closed cavity, avoiding the formation of a leakage area between the two, and can further enhance the suction tightness and cleaning efficiency of the water flow on the sludge surface of the aeration disc 4.

[0031] Among them, a water inlet valve 33 is arranged on the water inlet pipe 31, and a drain valve 34 is arranged on the drain pipe 32. Both the water inlet valve 33 and the drain valve 34 are electric valves, and a liquid level gauge 35 is arranged in the sump 3. The water inlet valve 33 and the drain valve 34 are used to adjust the water storage and discharge rhythm. The liquid level of the sump 3 is monitored by the liquid level feedback of the liquid level gauge 35 and is linked with the water inlet valve 33 and the drain valve 34 for feedback guidance of on-site operation, ensuring that the bottom outlet of the drain pipe 27 is always immersed, ensuring that the liquid level of the sump 3 meets the siphon operation conditions, and completing the pumping and discharging of the sludge mixture, while ensuring that there is no overspill in the pool.

[0032] The sewage cleaning control process of this equipment is as follows:

[0033] Close the control valve 28 on the drain pipe 27, inject water into the sump 3, and keep the water level higher than the outlet of the drain pipe 27. Inject water into the horizontal pipe 23, the vertical pipe 25, and the drain pipe 27 through the water inlet 24, so that the air in the horizontal pipe 23, the vertical pipe 25, and the drain pipe 27 is discharged from the water inlet 24. After each pipe is filled with water, seal the water inlet 24 to form an internal vacuum state. At this time, the bottom end of the movable baffle 261 is lower than the top surface of the aeration disk 4, and the spring 263 is in its initial state. In the initial state, the top column 262 is in contact with the shaft seal 251, and the shaft seal 251 is in the closed state. Start the drive motor 22, and the walking vehicle 2 moves along the length direction of the sewage tank 1. When the walking vehicle 2 advances to the first row of aeration disks 4, each sewage suction chassis 26 covers the top of the corresponding aeration disk 4. At this time, after the movable baffle 261 contacts the aeration disk 4, it gradually moves upward until the movable baffle 261 abuts against the aeration disk 4, and the spring 263 is in a compressed state. In order to facilitate the movable baffle 261 to be pushed up by the aeration disk 4, a circular concave platform can be reserved at the edge of the aeration disk 4, so that when the movable baffle 261 is translated to contact the aeration disk 4, the movable baffle 261 can gradually be translated to the top surface of the aeration disk 4 along the concave platform and be lifted up.

[0034] The upward-moving movable baffle 261 drives the top column 262 upward, pushing open the shaft seal 251 at the top of the sewage suction chassis 26 in the horizontal state, so that the shaft seal 251 opens and tilts to abut against the limiting member 252. In this embodiment, the opening angle θ of the shaft seal 251 is 55°, which can not only form a negative pressure suction channel between the vertical pipe 25 and the sewage suction chassis 26, but also prevent the shaft seal 251 from opening too much and being difficult to reset. To facilitate the smooth cooperation between the shaft seal 251 and the vertical pipe 25 for closing and opening, preferably, the vertical pipe 25 is a rectangular pipe, and the shaft seal 251 is a rectangular cover.

[0035] Since the sump 3 is as long as the side of the sewage tank 1, there is a liquid level difference between the sewage tank 1 and the sump 3, and the bottom pipe orifice of the drain pipe 27 extends below the liquid level of the sump 3. Since the liquid level of the sump 3 is lower than that of the sewage tank 1, after opening the control valve 28, the water previously filled in the drain pipe 27 can be discharged into the sump 3 through the siphon effect. The sludge water mixture is then sucked in through the vertical pipe 25 and the horizontal pipe 23 into the drain pipe 27 and flows into the sump 3. Due to the negative pressure suction around the sewage suction chassis 26 and the continuous air supply and injection of the aeration pipe 5 to the aeration disk 4, the sludge water mixture is continuously peeled off from the aeration disk 4. The opening degree of the control valve 28 can also be adjusted to control the pumping and discharging speed. After the sludge is emptied, close the control valve 28, and the walking vehicle 2 leaves this row of aeration disks 4. The shaft seal 251 is reset to close the vertical pipe 25 under the influence of the elastic force of the torsion spring 253 to prevent sewage backflow, completing the cleaning operation of a single row of aeration disks 4. At the same time, the spring 263 presses down the movable baffle 261 to move downward and reset. The walking vehicle 2 continues to clean the next row of aeration disks 4.

[0036] Through this device, automatic cleaning of the aeration discs 4 arranged in a matrix in the sewage tank 1 can be achieved without manual intervention, and it has good operation stability and engineering adaptability.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sewage treatment device with a cleanable aeration disc, characterized in that: It includes a traveling vehicle (2) arranged on the top of a sewage tank (1), and a collecting tank (3) arranged outside the sewage tank (1). The traveling vehicle (2) moves along the pool wall (11) of the sewage tank (1). The traveling vehicle (2) includes a transverse pipe (23), a vertical pipe (25), and a drainage pipe (27). The drainage pipe (27) extends into the collecting tank (3) and communicates with one end of the transverse pipe (23). The transverse pipe (23) is provided with a water inlet (24) at the other end. The vertical pipes (25) are arranged in parallel with the aeration discs (4) in the sewage tank (1). The tops of the vertical pipes (25) communicate with the transverse pipe (23). A sewage suction chassis (26) capable of covering above the aeration disc (4) is fixedly arranged at the bottom end of the vertical pipe (25). The sewage suction chassis (26) has an opening communicating with the vertical pipe (25). A rotating shaft seal (251) capable of closing the opening is horizontally arranged in the vertical pipe (25). One side of the rotating shaft seal (251) is connected to the inner wall of the vertical pipe (25) through a torsion spring (253) that resets after the rotating shaft seal (251) is opened. A limiting member (252) that catches on the upper side of the torsion spring (253) is arranged on the inner wall of the vertical pipe (25). A movable baffle (261) that abuts against the top surface of the aeration disc (4) is arranged in the sewage suction chassis (26). A spring (263) in a compressed state is connected between the movable baffle (261) and the sewage suction chassis (26). A top column (262) is arranged at the top of the movable baffle (261). When the movable baffle (261) moves upward, the top column (262) pushes the rotating shaft seal (251) open, causing the rotating shaft seal (251) to rotate around the torsion spring (253). A water inlet pipe (31) and a drain pipe (32) are arranged on the collecting tank (3).

2. The sewage treatment equipment with a cleanable aeration disc according to claim 1, characterized in that: Rubber wheels (21) that move on the top of the pool wall (11) of the sewage tank (1) are arranged on both sides of the traveling vehicle (2). Each rubber wheel (21) is equipped with a driving motor (22).

3. The sewage treatment equipment with a cleanable aeration disc according to claim 1, characterized in that: The height of the collecting tank (3) is lower than that of the sewage tank (1), and the bottom end of the drainage pipe (27) is lower than the bottom end of the aeration disc (4).

4. The sewage treatment equipment with a cleanable aeration disc according to claim 3, characterized in that: A control valve (28) is arranged inside the drainage pipe (27). The top of the drainage pipe (27) is connected to the transverse pipe (23) through a flange (271).

5. The sewage treatment equipment with a cleanable aeration disc according to claim 1, characterized in that: The movable baffle (261) is of an annular structure. There is at least a 1 cm gap between the top end of the movable baffle (261) and the sewage suction chassis (26). The bottom of the movable baffle (261) extends 2 - 4 cm out of the sewage suction chassis (26).

6. The sewage treatment equipment with a cleanable aeration disk according to claim 5, characterized in that: A sealing ring is arranged between the bottom end of the movable baffle (261) and the sewage suction chassis (26).

7. The sewage treatment equipment with a cleanable aeration disc according to claim 1, characterized in that: Both the transverse pipe (23) and the vertical pipe (25) are made of stainless steel pipes. The vertical pipe (25) is connected to the transverse pipe (23) through a tee joint (29).

8. The sewage treatment equipment with a cleanable aeration disc according to claim 1, characterized in that: An inlet valve (33) is arranged on the water inlet pipe (31), and a drain valve (34) is arranged on the drain pipe (32). Both the inlet valve (33) and the drain valve (34) are electric valves. A liquid level gauge (35) is arranged inside the collecting tank (3).

9. A sewage treatment system, characterized in that: A sewage treatment device capable of cleaning an aeration disc according to any one of claims 1-8.

Images