MBR (Membrane Bioreactor) sewage treatment pulse type microporous aeration device

Abstract

The utility model relates to the field of microporous aeration, in particular to a pulse microporous aeration device for MBR (membrane bioreactor) sewage treatment, which comprises an air supply mechanism, the air supply mechanism supplies air to the aeration device through a transfer mechanism by an air blower, and the transfer mechanism is connected with a reciprocating air inlet mechanism through an air inlet pipe. The reciprocating air inlet mechanism is connected with a spherical crown type micropore aerator through an air outlet pipe, the reciprocating air inlet mechanism comprises an air guide pipe connected with the air inlet pipe and the air outlet pipe, an opening and closing switching pipeline is connected in the air guide pipe in a sliding mode, and the opening and closing switching pipeline is communicated with the spherical crown type micropore aerator in the reciprocating sliding process in the air guide pipe. The spherical crown type microporous aerator is used for switching the on-off state between the air inlet pipe and the air outlet pipe, an original continuous aeration mode is switched into a pulse type aeration mode, and the spherical crown type microporous aerator is over against the membrane surface in the MBR system. A continuous aeration device is converted into a pulse type aeration device through the mechanism, so that the aeration cleaning effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of microporous aeration, in particular to a pulse type microporous aeration device for MBR sewage treatment. Background Art

[0002] MBR sewage treatment technology is a new sewage treatment process that combines traditional activated sludge treatment technology and high-efficiency membrane separation technology. It uses hollow fiber membranes for efficient mud-water separation, and due to the interception effect of the membrane, it can retain microorganisms with a longer cycle to achieve deep purification of sewage. MBR technology is particularly suitable for deep phosphorus removal and nitrogen removal, because nitrifying bacteria can fully reproduce in the system to improve the nitrification effect. However, the membrane surface in the MBR system is easily contaminated, resulting in reduced membrane flux. In order to alleviate membrane pollution, it is usually necessary to flush the membrane surface with a larger aeration intensity to form stirring and disturbance. The traditional continuous aeration method has the problem of high energy consumption.

[0003] Chinese patent CN216918789U discloses an aeration tank aeration device, the working principle of which is to use a blower as the main oxygen supply equipment, compress the air through the blower, and then transport the compressed air to the main flow pipe through the ventilation pipe. After the main flow pipe collects the air, it distributes the air to each independent connecting pipe through the control of the diverter pipe and the ball valve. The connecting pipe directly transmits the oxygen to the spherical cap microporous aerator, and the oxygen is evenly diffused into the water through the aerator to achieve oxygen supply. At the same time, the top of the spherical cap microporous aerator is fixedly connected with an annular filter frame, and the top of the annular filter frame is rotatably sleeved with a conical filter screen. These structures can filter the debris and microorganisms in the water to prevent them from clogging the pores of the aerator and improve the use efficiency. When the surface of the conical filter screen is blocked, the conical filter screen can be rotated and removed for cleaning, which increases the convenience of the device. A return pipe is fixedly connected to the bottom of the connecting pipe, which is used to buffer the excess oxygen when the oxygen supply is excessive, and ensure that the oxygen is temporarily stored in the branch pipe inside the return pipe. When in use, start the blower, and the compressed air passes through the ventilation pipe, main flow pipe, diversion pipe, connecting pipe, and finally through the spherical crown microporous aerator to supply oxygen to the water, while the conical filter screen and annular filter frame play a protective and filtering role.

[0004] However, the device in the patent document uses continuous aeration, and the stirring effect is not good. Although the pulse aeration method can save energy, there are problems of wear and blockage caused by frequent opening and closing of valves. Utility Model Content

[0005] In view of the above problems, a pulse microporous aeration device for MBR sewage treatment is provided, comprising an air supply mechanism, which is a blower, and supplies air to the aeration device through a transfer mechanism, and the transfer mechanism is connected to a reciprocating air supply mechanism through an air inlet pipe, and the reciprocating air supply mechanism is connected to a spherical cap microporous aerator through an air outlet pipe, and the reciprocating air supply mechanism comprises an air guide pipe connected to the air inlet pipe and the air outlet pipe, and an opening and closing switching pipe is slidably connected in the air guide pipe, and the opening and closing switching pipe switches the on-off state between the air inlet pipe and the air outlet pipe during the reciprocating sliding of the opening and closing switching pipe in the air guide pipe, and switches the original continuous aeration mode to pulse aeration, and the spherical cap microporous aerator is directly opposite to the membrane surface in the MBR system.

[0006] Preferably, a limit block is provided in the air guide pipe, and a limit groove adapted to the model of the limit block is provided on the opening and closing switching pipe. Through the cooperation between the limit groove and the limit block, the opening and closing switching pipe will not rotate relative to the air guide pipe during the reciprocating sliding process in the air guide pipe.

[0007] Preferably, a movable groove is provided on the inner wall of the opening and closing switching pipe, and a rotating block is rotatably connected inside the opening and closing switching pipe. A movable block is provided on one side of the rotating block, and the movable block is adapted to the movable groove model. When the rotating block rotates, it drives the movable block to rotate. When the movable block rotates, it moves along the movable groove, driving the opening and closing switching pipe to reciprocate along the axial position of the air guide pipe.

[0008] Preferably, the rotating block is fixedly connected to a rotating shaft, and the rotating shaft is driven to rotate by a servo motor.

[0009] Preferably, the opening and closing switching pipeline is provided with an air inlet communicated with the air inlet pipe, and an air outlet communicated with the air outlet pipe.

[0010] Preferably, the spherical cap type microporous aerator is provided with an anti-clogging mechanism, which is a filter screen on the spherical cap type microporous aerator, and is used to prevent dirt from clogging the spherical cap type microporous aerator.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The utility model adopts pulse aeration to replace the traditional continuous aeration method, which can effectively reduce energy consumption and avoid wear and blockage caused by frequent valve opening and closing. Pulse aeration reduces the continuous impact on the membrane surface through intermittent gas supply, prolongs the service life of the membrane, and achieves more accurate flushing and disturbance of the membrane surface in the MBR system by optimizing the aeration intensity and frequency, effectively alleviating membrane pollution and improving the efficiency and stability of the entire sewage treatment system;

[0013] 2. The utility model has a stopper block in the air guide pipe that cooperates with the stopper groove on the opening and closing switching pipe to ensure the stability of the opening and closing switching pipe during reciprocating motion and avoid additional wear caused by relative rotation. This design not only improves the reliability and durability of the equipment, but also achieves more efficient pulse aeration control by accurately controlling the on and off of gas flow, further improving the oxygen transfer efficiency and ventilation performance of the membrane assembly during sewage treatment;

[0014] 3. The design of the servo motor driving the rotating shaft in the utility model provides an accurate and reliable power source for pulse aeration. The precise control capability of the servo motor ensures that the rotating block and the opening and closing switching pipe connected thereto can reciprocate according to a predetermined pattern, thereby accurately controlling the supply of gas. This precise control not only optimizes the aeration process and improves the sewage treatment efficiency, but also reduces the risk of equipment damage caused by improper operation, and enhances the stability of the entire system and the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a pulsed microporous aeration device for MBR sewage treatment;

[0016] Figure 2 It is a schematic diagram of the disassembled structure of a pulse microporous aeration device for MBR sewage treatment;

[0017] Figure 3 It is a schematic diagram of the disassembly of the reciprocating air intake mechanism components of a pulsed microporous aeration device for MBR sewage treatment;

[0018] Figure 4 It is a pulse microporous aeration device for MBR sewage treatment. Figure 3 A partial enlarged view of the middle part;

[0019] Figure 5 It is a pulse microporous aeration device for MBR sewage treatment. Figure 3 A partial enlarged view of point B in the middle;

[0020] Figure 6 It is a top view of a pulsed microporous aeration device for MBR sewage treatment;

[0021] Figure 7 It is a pulse microporous aeration device for MBR sewage treatment. Figure 6 Cross-sectional view of CC.

[0022] The numbers in the figure are: 1. air supply mechanism; 11. air inlet pipe; 12. transfer mechanism; 2. reciprocating air inlet mechanism; 21. air outlet pipe; 22. air guide pipe; 221. limit block; 23. opening and closing switching pipeline; 231. limit groove; 232. moving groove; 233. air inlet; 234. air outlet; 24. servo motor; 241. rotating shaft; 242. rotating block; 243. moving block; 3. spherical crown type microporous aerator; 4. anti-clogging mechanism; 41. filter screen. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figure 1-Figure 7 A pulsed microporous aeration device for MBR sewage treatment includes an air supply mechanism 1, which is a blower. The air supply mechanism 1 supplies air to the aeration device through a transfer mechanism 12. The transfer mechanism 12 is connected to a reciprocating air intake mechanism 2 through an air intake pipe 11. The reciprocating air intake mechanism 2 is connected to a spherical cap microporous aerator 3 through an air outlet pipe 21. The reciprocating air intake mechanism 2 includes an air guide pipe 22 connected to the air intake pipe 11 and the air outlet pipe 21. An opening and closing switching pipe 23 is slidably connected in the air guide pipe 22. During the reciprocating sliding process in the air guide pipe 22, the opening and closing switching pipe 23 switches the on-off state between the air intake pipe 11 and the air outlet pipe 21, and switches the original continuous aeration mode to pulsed aeration. The spherical cap microporous aerator 3 is directly opposite to the membrane surface in the MBR system.

[0025] In the prior art, the membrane surface in the MBR system is easily contaminated, resulting in a decrease in membrane flux. In order to alleviate membrane contamination, it is usually necessary to flush the membrane surface with a larger aeration intensity to form stirring and disturbance. The traditional continuous aeration method has the problem of high energy consumption, and although the pulse aeration method can save energy, there are problems of wear and blockage caused by frequent switching of valves. In the utility model, the blower is connected to a transfer mechanism 12, and the transfer mechanism 12 is connected to a reciprocating air intake mechanism 2 through an air intake pipe 11, and the reciprocating air intake mechanism 2 is connected to a spherical crown microporous aerator 3 through an air outlet pipe 21. The reciprocating air intake mechanism 2 includes an air guide pipe 22, and an opening and closing switching pipe 23 is slidably connected in the air guide pipe 22. The opening and closing switching pipe 23 slides back and forth in the air guide pipe 22 to switch the on and off state between the air intake pipe 11 and the air outlet pipe 21, thereby converting the continuous aeration method into pulse aeration. The spherical cap type microporous aerator 3 is directly facing the membrane surface in the MBR system, so that the pulse aeration can directly act on the membrane surface, improve the oxygen transfer efficiency and reduce the membrane surface pollution.

[0026] Reference Figure 1-Figure 5A limit block 221 is provided in the air guide tube 22, and a limit groove 231 adapted to the model of the limit block 221 is provided on the opening and closing switching pipe 23. Through the cooperation between the limit groove 231 and the limit block 221, the opening and closing switching pipe 23 will not rotate relative to the air guide tube 22 during the reciprocating sliding process in the air guide tube 22.

[0027] In the pulse microporous aeration device for MBR sewage treatment, a limit block 221 is provided in the air guide pipe 22, and a limit groove 231 adapted to the model of the limit block 221 is provided on the opening and closing switching pipe 23. Through the cooperation of the limit groove 231 and the limit block 221, when the opening and closing switching pipe 23 slides back and forth in the air guide pipe 22, it can prevent it from rotating relative to the air guide pipe 22, ensuring that the opening and closing switching pipe 23 can stably control the on-off state between the air inlet pipe 11 and the air outlet pipe 21, thereby realizing the pulse control of the gas flow during the aeration process, effectively improving the aeration efficiency and reducing the pollution of the membrane surface.

[0028] Reference Figure 1-Figure 7 : A moving groove 232 is provided on the inner wall of the opening and closing switching pipe 23, and a rotating block 242 is rotatably connected inside the opening and closing switching pipe 23. A moving block 243 is provided on one side of the rotating block 242. The moving block 243 is adapted to the model of the moving groove 232. When the rotating block 242 rotates, the moving block 243 is driven to rotate. When the moving block 243 rotates, it moves along the moving groove 232, driving the opening and closing switching pipe 23 to reciprocate along the axial position of the air guide pipe 22.

[0029] In the pulse microporous aeration device for MBR sewage treatment, a moving groove 232 is provided on the inner wall of the opening and closing switching pipe 23, and the inner wall of the pipe is rotatably connected to the rotating block 242. A moving block 243 is provided on one side of the rotating block 242, and the moving block 243 is adapted to the model of the moving groove 232. When the rotating block 242 rotates, the moving block 243 is driven to rotate together. As the rotating block 242 rotates, the moving block 243 moves along the moving groove 232 on the inner wall of the opening and closing switching pipe 23. The movement of the moving block 243 along the moving groove 232 drives the opening and closing switching pipe 23 itself to reciprocate along the axial position of the air duct 22. Such a design enables the opening and closing switching pipe 23 to effectively control the on and off of the gas flow inside the air duct 22, realize the pulsed operation of aeration, and optimize the aeration efficiency and the ventilation performance of the membrane surface.

[0030] Reference Figure 1-Figure 3 The rotating block 242 is fixedly connected to a rotating shaft 241, and the rotating shaft 241 is driven to rotate by a servo motor 24.

[0031] In the pulse microporous aeration device for MBR sewage treatment, the rotating block 242 is fixedly connected to the rotating shaft 241, and the rotating shaft 241 is driven to rotate by the servo motor 24. The servo motor 24 drives the rotating block 242 to rotate by controlling the rotation of the rotating shaft 241. Since the rotating block 242 is connected to the moving block 243 inside the opening and closing switching pipe 23, the rotation of the rotating block 242 drives the moving block 243 to reciprocate in the moving groove 232 of the opening and closing switching pipe 23. The reciprocating motion of the moving block 243 directly causes the opening and closing switching pipe 23 to perform corresponding reciprocating motion along the axial position of the air guide pipe 22, thereby controlling the state of air intake and air outlet, and realizing pulse aeration. The precise control capability of the servo motor 24 ensures the stability and reliability of the pulse aeration process, and improves the aeration efficiency and the service life of the membrane assembly in the sewage treatment process.

[0032] Reference Figure 3 and Figure 7 The on-off switching pipe 23 is provided with an air inlet 233 communicating with the air inlet pipe 11 , and an air outlet 234 communicating with the air outlet pipe 21 .

[0033] In the pulse microporous aeration device for MBR sewage treatment, the opening and closing switching pipe 23 has two key interfaces, namely the air inlet 233 and the air outlet 234. These interfaces are respectively connected to the air inlet pipe 11 and the air outlet pipe 21. When the air inlet 233 and the air outlet 234 on the opening and closing switching pipe 23 coincide with the air inlet pipe 11 and the air outlet pipe 21, respectively, the air provided by the transfer mechanism 12 through the air inlet pipe 11 flows into the reciprocating air inlet mechanism 2, and then flows to the spherical crown microporous aerator 3 to realize the aeration process. This design allows the pulse control of aeration to be realized by controlling the coincidence state of the air inlet 233 and the air outlet 234 on the opening and closing switching pipe 23 with the air inlet pipe 11 and the air outlet pipe 21, thereby optimizing the aeration efficiency and the ventilation performance of the membrane assembly.

[0034] Reference Figure 1 and Figure 2 The spherical cap microporous aerator 3 is provided with an anti-clogging mechanism 4, which is a filter screen 41 on the spherical cap microporous aerator 3, and is used to prevent dirt from clogging the spherical cap microporous aerator 3.

[0035] In the pulse microporous aeration device for MBR sewage treatment, an anti-clogging mechanism 4 is installed outside the spherical cap microporous aerator 3, which is specifically a filter 41, which is directly arranged on the surface of the spherical cap microporous aerator 3. The function of the filter 41 is to capture and isolate dirt and particles that may clog the micropores during the aeration process, thereby ensuring that the micropores of the aerator are not clogged, maintaining the aeration efficiency and the ventilation performance of the membrane assembly. Through the protection of the filter 41, the aerator can perform gas exchange more effectively, while reducing the need for maintenance and cleaning.

[0036] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A pulsed microporous aeration device for MBR sewage treatment, comprising an air supply mechanism (1), wherein the air supply mechanism (1) is a blower that supplies air to the aeration device through a transfer mechanism (12), the transfer mechanism (12) is connected to a reciprocating air intake mechanism (2) through an air intake pipe (11), and the reciprocating air intake mechanism (2) is connected to a spherical cap microporous aerator (3) through an air outlet pipe (21), characterized in that: The reciprocating air intake mechanism (2) comprises an air guide pipe (22) connected to an air intake pipe (11) and an air outlet pipe (21); an opening and closing switching pipe (23) is slidably connected in the air guide pipe (22); the opening and closing switching pipe (23) switches the on-off state between the air intake pipe (11) and the air outlet pipe (21) during the reciprocating sliding process in the air guide pipe (22), thereby switching the original continuous aeration mode to pulse aeration; the spherical crown type microporous aerator (3) is directly opposite to the membrane surface in the MBR system.

2. The MBR sewage treatment pulse microporous aeration device according to claim 1, characterized in that: A limit block (221) is provided in the air guide tube (22), and a limit groove (231) adapted to the model of the limit block (221) is provided on the opening and closing switching pipe (23). Through the cooperation between the limit groove (231) and the limit block (221), the opening and closing switching pipe (23) will not rotate relative to the air guide tube (22) during the process of reciprocating sliding in the air guide tube (22).

3. A pulsed microporous aeration device for MBR sewage treatment according to claim 2, characterized in that: The inner wall of the on-off switching pipe (23) is provided with a moving groove (232), and a rotating block (242) is rotatably connected inside the on-off switching pipe (23). A moving block (243) is provided on one side of the rotating block (242), and the moving block (243) is adapted to the type of the moving groove (232). When the rotating block (242) rotates, the moving block (243) is driven to rotate. When the moving block (243) rotates, it moves along the moving groove (232), driving the on-off switching pipe (23) to reciprocate along the axial position of the air guide pipe (22).

4. A pulsed microporous aeration device for MBR sewage treatment according to claim 3, characterized in that: The rotating block (242) is fixedly connected to a rotating shaft (241), and the rotating shaft (241) is driven to rotate by a servo motor (24).

5. The MBR sewage treatment pulse microporous aeration device according to claim 1, characterized in that: The on-off switching pipe (23) is provided with an air inlet (233) communicating with the air inlet pipe (11), and an air outlet (234) communicating with the air outlet pipe (21).

6. The MBR sewage treatment pulse microporous aeration device according to claim 1, characterized in that: The spherical cap type microporous aerator (3) is provided with an anti-clogging mechanism (4) outside. The anti-clogging mechanism (4) is a filter screen (41) on the spherical cap type microporous aerator (3) and is used to prevent dirt from clogging the spherical cap type microporous aerator (3).

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