A sewage treatment device with cleanable aerator

Abstract

The application discloses a sewage treatment equipment capable of cleaning an aeration disc, which comprises a walking vehicle arranged on 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, and the walking vehicle comprises a horizontal pipeline, a vertical pipeline and a drainage pipeline, the vertical pipeline is arranged in parallel with the aeration disc in the sewage pool; a suction chassis capable of covering above the aeration disc is fixedly arranged at the bottom end of the vertical pipeline, a rotating shaft seal capable of sealing the opening is horizontally arranged in the vertical pipeline; a movable baffle abutting against the top surface of the aeration disc is arranged in the suction chassis, springs are connected between the movable baffle and the suction chassis, top columns are arranged on the top of the movable baffle, the top columns top the rotating shaft seal when the movable baffle moves upwards, and the rotating shaft seal rotates around the torsional spring. The application aims to provide the sewage treatment equipment which can clean the surface sludge of the aeration disc in real time and efficiently under the normal operation state of the sewage treatment system.

Description

TECHNICAL FIELD

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

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

[0003] At present, the common aeration disc cleaning methods in the sewage treatment industry mainly include manual cleaning and chemical cleaning. Manual cleaning needs to stop and empty the pool body, which not only affects the continuity of the system, but also brings high labor cost and safety risk; the chemical cleaning method can effectively remove the deposits, but due to the use of chemicals, it will increase the environmental burden and need regular maintenance, and also cannot completely avoid the shutdown. The mechanical cleaning equipment usually needs to work after stopping or emptying, and still cannot meet the needs of continuous operation and low-cost maintenance. Therefore, there is an urgent need for a sewage treatment equipment capable of cleaning 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

[0004] The present application aims to overcome the deficiencies in the prior art, and provides a sewage treatment equipment capable of cleaning 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-mentioned purpose, the technical scheme of the present application is as follows:

[0006] The utility model provides a sewage treatment equipment of cleanable aeration disc, including the travelling vehicle of sewage pool top arrangement and the water collecting pool of sewage pool outside, the travelling vehicle moves along the pool wall of sewage pool, and the travelling vehicle includes horizontal pipeline, vertical pipeline and drainage pipeline, and the drainage pipeline stretches into the water collecting pool and communicates with one end of horizontal pipeline, and horizontal pipeline is provided with water inlet on the other end, and vertical pipeline is arranged in parallel with the aeration disc in sewage pool, and the top of each vertical pipeline communicates with horizontal pipeline, the bottom of vertical pipeline is fixedly provided with the suction bottom tray that can cover above the aeration disc, and the suction bottom tray has the opening that communicates with vertical pipeline, and the vertical pipeline is horizontally provided with the pivot seal that can close the opening, and one side of pivot seal is connected with the inner wall of vertical pipeline through the torsional spring that resets after pivot seal opens, and the inner wall of vertical pipeline is provided with the limiting piece that is clamped on the upside of torsional spring, the movable baffle that abuts against the top surface of aeration disc is arranged in the suction bottom tray, the spring that is in compression is connected between movable baffle and suction bottom tray, the top of movable baffle is provided with the top post, and when movable baffle moves up, the top post opens pivot seal and makes pivot seal rotate around torsional spring, the water inlet pipe and drainage pipe are arranged on the water collecting pool.

[0007] Further, the travelling vehicle is provided with rubber wheels on both sides, which move on the top of the pool wall of the sewage pool.

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

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

[0010] Further, the movable baffle is in a ring structure, and the distance between the top end of the movable baffle and the suction bottom tray is at least 1 cm, and the bottom of the movable baffle extends out of the suction bottom tray by 2-4 cm.

[0011] Further, a sealing ring is arranged between the bottom end of the movable baffle and the suction bottom tray.

[0012] Further, the horizontal pipeline and the vertical pipeline are both composed 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 water inlet pipe, and a drainage valve is arranged on the drainage pipe, and the water inlet valve and the drainage valve are both electric valves, and a liquid level meter is arranged in the water collecting pool.

[0014] The utility model further relates to a sewage treatment system, which comprises the sewage treatment equipment of cleanable aeration disc.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The present application can automatically clean the aeration disc at the bottom of the sewage treatment system during continuous operation, without stopping and draining or manual entry into the pool, significantly improving the continuous treatment capacity of the system, reducing the interference of maintenance on production, effectively avoiding downtime and manual risks caused by manual cleaning. The cooperation of the suction bottom disc and the shaft seal eliminates the electronic inductor and complex control system, and the shaft seal is opened for sludge suction after the movable baffle contacts the aeration disc, the structure is simple, the action response is stable, the operation reliability and adaptability of the equipment are greatly improved, the system failure risk is reduced, and long-term efficient operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

[0020] Figure 4 is a side view of the walking car in the present application;

[0021] Figure 5 is a top view of the suction bottom disc in the present application.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1-sewage pool, 2-walking car, 3-water collecting pool, 4-aeration disc, 5-aeration pipe, 11-pool wall, 21-rubber wheel, 22-driving motor, 23-transverse pipe, 24-water inlet, 25-vertical pipe, 26-suction bottom disc, 27-drainage pipe, 28-control valve, 29-three-way connector, 31-water inlet pipe, 32-drainage pipe, 33-water inlet valve, 34-drainage valve, 35-liquid level meter, 251-shaft seal, 252-limiting part, 253-torsional spring, 261-movable baffle, 262-top column, 263-spring, 271-flange. DETAILED DESCRIPTION

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

[0025] As Figures 1 to 5As shown, a sewage treatment equipment capable of cleaning the aeration disc includes a walking vehicle 2 arranged at the top of a sewage pool 1 and a collecting pool 3 arranged outside the sewage pool 1, the walking vehicle 2 moves along the pool wall 11 of the sewage pool 1, the walking vehicle 2 includes a horizontal pipe 23, a vertical pipe 25 and a drainage pipe 27, the drainage pipe 27 extends into the collecting pool 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 pipe 25 is arranged in parallel with the aeration disc 4 in the sewage pool 1, and the top of each vertical pipe 25 communicates with the horizontal pipe 23; the bottom end of the vertical pipe 25 is fixedly provided with a suction chassis 26 capable of covering the aeration disc 4, the 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 with the inner wall of the vertical pipe 25 through a torsional spring 253 which resets after the rotating shaft seal 251 is opened, and the inner wall of the vertical pipe 25 is provided with a limiting piece 252 clamped on the upper side of the torsional spring 253; the suction chassis 26 is provided with a movable baffle 261 abutting against the top surface of the aeration disc 4, a spring 263 in a compressed state is connected between the movable baffle 261 and the suction chassis 26, and the top of the movable baffle 261 is provided with a top column 262, which opens the rotating shaft seal 251 when the movable baffle 261 moves upward, so that the rotating shaft seal 251 rotates around the torsional spring 253; the collecting pool 3 is provided with a water inlet pipe 31 and a drainage pipe 32.

[0026] Wherein, the walking vehicle 2 is provided with rubber wheels 21 moving on the top of the pool wall 11 of the sewage pool 1 on both sides, and each rubber wheel 21 is equipped with a driving motor 22. The rubber wheel 21 and the frame of the driving motor 22 are connected to the horizontal pipe 23, the walking vehicle 2 is supported by the rubber wheel 21 and driven by the driving motor 22, so that the walking vehicle 2 moves on the top of the pool wall 11. The aeration disc 4 in the sewage pool 1 can be arranged in multiple rows, and each row of aeration disc 4 corresponds to a vertical pipe 25 and a suction chassis 26. Through the multiple groups of vertical pipes 25 and suction chassis 26 carried by the walking vehicle 2, the equipment can cover all the aeration discs 4 on the pool bottom in sequence, realize back-and-forth operation, and flexibly adjust the cleaning frequency according to the sludge concentration, greatly save labor, and improve the operation safety, especially suitable for environments such as deep pool bodies which are not suitable for manual operation.

[0027] Wherein, the height of the collecting pool 3 is lower than that of the sewage pool 1, and the bottom end of the drainage pipe 27 is lower than the bottom end of the aeration disc 4. The collecting pool 3 is lower than the sewage pool 1, which can facilitate the liquid level in the collecting pool 3 to be lower than that in the sewage pool 1, and when the outlet of the drainage pipe 27 is lower than the bottom end of the aeration disc 4, the rotating shaft seal 251 is opened to form a siphon effect, so that the water in the sewage pool 1 is sucked into the collecting pool 3.

[0028] The control valve 28 is arranged in the pipe of the drain pipe 27, and the top of the drain pipe 27 is connected with the horizontal pipe 23 through the flange 271. The horizontal pipe 23 and the vertical pipe 25 are both composed of stainless steel pipes, and the vertical pipe 25 is connected with the horizontal pipe 23 through the tee joint 29. In the 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 for adjusting 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 as a whole 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] The movable baffle 261 is in a ring structure, and the top end of the movable baffle 261 is spaced apart from the suction disc 26 by at least 1 cm, so as 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 out of the bottom of the suction disc 26 by 2-4 cm, so that when the suction disc 26 covers the aerator plate 4, the suction disc 26 and the aerator plate 4 have a spacing height, so that when the vertical pipe 25 is opened, a negative pressure suction range larger than the aerator plate 4 can be formed around the suction disc 26, and the attached sludge can be effectively peeled off.

[0030] The bottom end of the movable baffle 261 and the suction disc 26 are provided with a sealing ring, the sealing ring closes the gap between the suction disc 26 and the movable baffle 261 to form a local closed cavity, avoids the formation of a leakage area between the two, and can further enhance the suction airtightness and cleaning efficiency of the water flow on the surface of the aerator plate 4.

[0031] The water inlet valve 33 and the drain valve 34 are both electric valves, and the water collecting tank 3 is provided with a liquid level meter 35. The water inlet valve 33 and the drain valve 34 are used for adjusting the storage and discharge rhythm, the liquid level of the water collecting tank 3 is monitored by the liquid level feedback of the liquid level meter 35 and is linked to control the water inlet valve 33 and the drain valve 34, feedback guidance is provided for on-site operation, the bottom outlet of the drain pipe 27 is always submerged, the liquid level of the water collecting tank 3 meets the siphon operation condition, the sludge mixed liquid is pumped and discharged, and overflow in the tank is avoided.

[0032] The sludge control process of the device is as follows:

[0033] Close the control valve 28 on the drain pipe 27, fill the water tank 3 with water, keep the water level higher than the outlet of the drain pipe 27, fill the horizontal pipe 23, the vertical pipe 25 and the drain pipe 27 with water through the water inlet 24, and exhaust the air in the horizontal pipe 23, the vertical pipe 25 and the drain pipe 27 through the water inlet 24, then close the water inlet 24 to form an internal vacuum state after each pipe is filled with water, at this time the bottom end of the movable baffle 261 is lower than the top surface of the aeration disc 4, the spring 263 is in the initial state, the top column 262 in the initial state is in contact with the rotating shaft seal 251 and the rotating shaft seal 251 is in the closed state. Start the driving motor 22, and move the walking vehicle 2 along the length direction of the sewage tank 1, when the walking vehicle 2 advances to the first row of aeration discs 4, each suction bottom disc 26 covers the top of the corresponding aeration disc 4, at this time the movable baffle 261 is in contact with the aeration disc 4 and gradually moves up to abut against the aeration disc 4, and the spring 263 is in the compressed state. In order to facilitate the movable baffle 261 to be lifted up by the aeration disc 4, the edge of the aeration disc 4 can be reserved with an annular recess, so that when the movable baffle 261 is in contact with the aeration disc 4, the movable baffle 261 can gradually translate along the recess to the top surface of the aeration disc 4 and be lifted up.

[0034] The movable baffle 261 moving up drives the top column 262 to move up, opens the rotating shaft seal 251 at the top of the suction bottom disc 26 in the horizontal state, and makes the rotating shaft seal 251 open and abut against the limiting piece 252. In the embodiment, the opening angle θ of the rotating shaft seal 251 is 55°, which can form a negative pressure suction channel between the vertical pipe 25 and the suction bottom disc 26, and can also avoid that the rotating shaft seal 251 is difficult to reset due to the opening angle being too large. In order to facilitate the rotating shaft seal 251 to be smoothly matched with the vertical pipe 25 for closing and opening, the vertical pipe 25 is preferably a rectangular pipe, and the rotating shaft seal 251 is a rectangular cover body.

[0035] Since the water tank 3 and the side of the sewage tank 1 are equal in length, there is a liquid level difference between the sewage tank 1 and the water tank 3, and the bottom pipe opening of the drain pipe 27 is below the liquid level of the water tank 3. Since the liquid level of the water tank 3 is lower than that of the sewage tank 1, after the control valve 28 is opened, the water in the drain pipe 27 can be drained to the water tank 3 through the siphon effect, and the sludge-water mixture is sucked into the drain pipe 27 through the vertical pipe 25 and the horizontal pipe 23 and flows into the water tank 3. The sludge-water mixture is continuously stripped from the aeration disc 4 due to the negative pressure suction around the suction bottom disc 26 and the continuous gas injection of the aeration pipe 5 on the aeration disc 4. The opening degree of the control valve 28 can also be adjusted to control the pumping speed, the control valve 28 is closed after the sludge is emptied, the walking vehicle 2 leaves the row of aeration discs 4, the rotating shaft seal 251 is reset and closed to the vertical pipe 25 under the influence of the elastic force of the torsional spring 253, and the sewage is prevented from flowing back, and the sludge removal operation of a single row of aeration discs 4 is completed. At the same time, the spring 263 presses down the movable baffle 261 to reset. The walking vehicle 2 continues to perform the sludge removal operation on the next row of aeration discs 4.

[0036] The device can realize automatic cleaning of the aeration plates 4 arranged in matrix in the sewage tank 1 without manual intervention, and has good operation stability and engineering adaptability.

[0037] The above merely describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wastewater treatment device with cleanable aeration discs, characterized in that: The system includes a mobile vehicle (2) mounted on top of the sewage tank (1) and a collection tank (3) located outside the sewage tank (1). The mobile vehicle (2) moves along the tank wall (11) of the sewage tank (1). The mobile vehicle (2) includes a horizontal pipe (23), a vertical pipe (25), and a drainage pipe (27). The drainage pipe (27) extends into the collection tank (3) and is connected to one end of the horizontal pipe (23). The horizontal pipe (23) has an inlet (24) at the other end. The vertical pipe (25) is arranged in parallel with the aeration discs (4) in the sewage tank (1). The top of each vertical pipe (25) is connected to the horizontal pipe (23). The bottom end of the vertical pipe (25) is fixedly equipped with a suction plate (26) that can cover the aeration discs (4). The suction plate (26) has an opening that communicates with the vertical pipe (25). Water in the vertical pipe (25) A rotating shaft seal (251) capable of closing the opening is provided on the flat side. 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 the rotating shaft seal (251) after it is opened. A limiting member (252) that is locked on the upper side of the torsion spring (253) is provided 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 provided inside the suction chassis (26). A spring (263) in a compressed state is connected between the movable baffle (261) and the suction chassis (26). A top column (262) is provided on the top of the movable baffle (261). When the movable baffle (261) moves upward, the top column (262) pushes open the rotating shaft seal (251), so that the rotating shaft seal (251) rotates around the torsion spring (253). The water collection tank (3) is provided with an inlet pipe (31) and a drain pipe (32).

2. The wastewater treatment equipment with cleanable aeration discs according to claim 1, characterized in that: Both sides of the walking vehicle (2) are equipped with rubber wheels (21) that move on the top of the pool wall (11) of the sewage pool (1), and each rubber wheel (21) is equipped with a drive motor (22).

3. The wastewater treatment equipment with cleanable aeration discs according to claim 1, characterized in that: The height of the water collection 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 wastewater treatment equipment with cleanable aeration discs according to claim 3, characterized in that: The drainage pipe (27) is equipped with a control valve (28), and the top of the drainage pipe (27) is connected to the horizontal pipe (23) through a flange (271).

5. The wastewater treatment equipment with cleanable aeration discs according to claim 1, characterized in that: The movable baffle (261) has a ring structure. The top of the movable baffle (261) is at least 1 cm away from the suction base (26), and the bottom of the movable baffle (261) extends 2-4 cm beyond the suction base (26).

6. A wastewater treatment device with a cleanable aeration disc according to claim 5, characterized in that: A sealing ring is provided between the bottom end of the movable baffle (261) and the suction chassis (26).

7. A wastewater treatment device with a cleanable aeration disc according to claim 1, characterized in that: 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 connector (29).

8. The wastewater treatment equipment with cleanable aeration discs according to claim 1, characterized in that: The inlet pipe (31) is equipped with an inlet valve (33), and the drain pipe (32) is equipped with a drain valve (34). Both the inlet valve (33) and the drain valve (34) are electric valves. The water collection tank (3) is equipped with a level gauge (35).

9. A wastewater treatment system, characterized in that: The wastewater treatment device includes a cleanable aeration disc as described in any one of claims 1-8.

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