A separation device for MBR membrane treatment of sewage plants and a method of using the same

Abstract

This invention belongs to the field of separation equipment technology, specifically a separation device for MBR membrane treatment in wastewater treatment plants and its usage method. It includes a membrane tank, membrane plates, a water collection pipe, an outlet pipe, and an aeration pipe installed at the bottom of the membrane tank. The aeration pipe is externally connected to an aeration pump for pumping air into the membrane tank. A speed-regulating flushing component is also included, installed on the aeration pipe, to adjust the air output rate, thereby adjusting the flushing effect on the membrane. This invention, by setting up a speed-regulating flushing component and utilizing the change in the speed limiter, alters the gas ejection efficiency within the speed limiter. In practical applications, this change in gas ejection efficiency leads to a change in the impact effect of the gas on the membrane. This change in impact force enhances the flushing effect and range on the sludge. Furthermore, by adjusting the control law of the speed limiter, the flexibility of the gas flushing process is further enhanced.

Description

Technical Field

[0001] This invention belongs to the field of separation equipment technology, specifically a separation device for MBR membrane treatment in wastewater treatment plants and its usage method. Background Technology

[0002] Pharmaceutical wastewater mainly originates from various drug production facilities, such as biopharmaceutical plants, chemical pharmaceutical plants, traditional Chinese medicine plants, and formulation plants. Due to its high organic content, strong toxicity, and complex pollutant composition, pharmaceutical wastewater is one of the most difficult-to-degrade industrial wastewaters. Therefore, it is necessary to purify and filter pharmaceutical wastewater before discharging it.

[0003] Pharmaceutical wastewater treatment technologies can be broadly categorized into physical, chemical, and biological methods based on their principles. Physical methods remove some pollutants from wastewater through physical means, offering relatively low costs. However, they are primarily used for pretreatment and can only separate macroscopic particles. Commonly used methods include adsorption, membrane separation, and flotation. Among these, flat-plate MBR membrane technology, with its advantages of low energy consumption and small footprint, has been widely applied in pharmaceutical wastewater treatment. Flat-plate MBR technology not only increases sludge concentration but also prevents activated sludge loss after sludge bulking. It also boasts advantages such as high sludge concentration, strong biochemical capacity, and excellent NH3-N removal efficiency. Furthermore, it offers high purification efficiency for recalcitrant organic matter and shortens hydraulic retention time.

[0004] In flat-sheet MBR membrane treatment technology, water and sludge are separated through uniformly arranged membrane surfaces. During the separation process, not only does sludge remain on the membrane surface, but bacteria and other organisms that thrive in the sludge also adhere to it. This sludge residue negatively impacts the membrane's permeability. Therefore, cleaning the membrane surface is crucial in flat-sheet MBR membrane treatment technology. Conventional cleaning methods often involve using aeration airflow to impact the membrane surface and separate the sludge from the membrane. However, in practical applications, it has been found that, firstly, the aeration device is fixed, resulting in a fixed airflow path and a fixed airflow outlet position. Secondly, the scouring effect on the membrane surface gradually weakens during airflow, leading to poor sludge separation on membrane surfaces farther from the aeration device. Therefore, this invention proposes a separation device and its usage method for wastewater treatment MBR membrane treatment to solve the aforementioned technical problems.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the present invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a separation device for MBR membrane treatment in wastewater treatment plants and its usage method.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a separation device for MBR membrane treatment in a wastewater treatment plant, comprising a membrane tank, wherein the membrane tank is a frame structure;

[0008] The membrane panels are designed in multiples and stacked in a membrane box. The membrane panels are fixedly connected to the membrane sheet by a frame.

[0009] A water collection pipe is fixedly installed on the membrane plate and is used to collect the water produced by the membrane plate.

[0010] The water outlet pipe is connected to both the water collection pipe and the end of the water outlet pipe away from the water collection pipe is connected to a water suction device.

[0011] It also includes an aeration pipe, which is installed at the bottom of the membrane tank and connected to an aeration pump for pumping air into the membrane tank;

[0012] A speed-regulating flushing component is installed on the aeration pipe and is used to adjust the air outlet rate of the aeration pipe, thereby adjusting the flushing effect on the membrane.

[0013] The speed-regulating flushing assembly includes an air outlet, which is opened on the aeration pipe and corresponds to the gap between the air outlet and the membrane plate.

[0014] A speed limiter is installed inside the air outlet. The inner diameter of the speed limiter is adjustable. The speed limiter is used to control the air outlet rate.

[0015] Preferably, the speed limiting tube consists of a tube body and a speed limiting plug. The tube body is fixedly installed inside the air outlet, and the speed limiting plug is slidably installed inside the tube body. The inner cavity of the tube body has a stepped design, and the speed limiting plug has a T-shaped structure. The speed limiting plug and the inner cavity of the tube body are elastically connected by an elastic rope. The bottom of the speed limiting plug extends into the inner cavity of the aeration tube. A batch adjustment component is installed in the aeration tube, and the batch adjustment component pushes the speed limiting plug to move in batches.

[0016] Preferably, the T-shaped diameter of the speed limiter is made of a rubber sheet at its largest end, and the diameter of the speed limiter decreases as the distance between the speed limiter and the step inside the tube increases.

[0017] Preferably, the batch adjustment assembly includes an adjusting rod, which is rotatably installed in the aeration pipe, and the adjusting rod is a reciprocating lead screw;

[0018] An adjusting block is screwed to an adjusting rod, and the adjusting block reciprocates in the aeration pipe.

[0019] Preferably, a power chamber is provided in the middle of the aeration pipe, the inner cavity of the power chamber is connected to the inner cavity of the aeration pipe, a wind turbine is rotatably installed in the power chamber, some of the fan blades of the wind turbine are located on the airflow path in the aeration pipe, and the wind turbine is connected to the adjusting rod by belt drive.

[0020] Preferably, a transmission box is fixedly installed on the aeration pipe, and both the impeller and the adjusting rod extend into the transmission box. Both the impeller and the adjusting rod are detachably mounted with pulleys at one end inside the transmission box, and the pulleys inside the transmission box are connected by a belt.

[0021] Preferably, the aeration pipes are designed in multiples, with the portions inside the membrane box parallel to each other and the portions outside the membrane box interconnected. A telescopic rod is fixedly installed at the top of the speed limiting pipe, and multiple telescopic rods located in the same membrane plate gap are jointly and fixedly connected to a scraper. Both the telescopic rod and the scraper are hollow, and the inner cavities of the speed limiting pipe, the telescopic rod, and the scraper are interconnected. The bottom of the scraper has uniformly distributed spray microholes.

[0022] Preferably, the cross-section of the scraper is C-shaped, and the spray micro-holes are all inclined.

[0023] Preferably, the scraper has an overall arc-shaped design, with a higher middle and lower ends.

[0024] A method for using a separation device for MBR membrane treatment in a wastewater treatment plant, the method comprising the following steps:

[0025] S1. Installation: Install the device in the sewage purification tank, connect the aeration pipe to the aeration pump, connect the outlet pipe to the water suction equipment, and simultaneously power on the device.

[0026] S2. Debugging: Open the transmission box, replace the pulley and belt, and adjust the transmission ratio between the impeller and the adjusting rod by the ratio of the diameter of the pulley in the transmission box;

[0027] S3, Separation: The water suction equipment is started, and the sewage is discharged after being filtered and separated by the membrane. Sludge, impurities and other impurities are intercepted on the membrane surface.

[0028] S4. Flushing: The aeration pump starts and delivers airflow into the aeration pipe. After being guided by the speed limiting pipe and the telescopic rod, the airflow impacts the membrane through the micro-jet holes at the bottom of the scraper, removing the sludge from the membrane surface.

[0029] S5. Diffusion: The airflow drives the impeller to rotate, which in turn drives the regulating rod to rotate and the regulating block to move linearly. When the regulating block moves, it pushes the speed limiter upward, increasing the airflow velocity. The scraper moves up and down under the action of air pressure, enhancing the cleaning effect on the diaphragm.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. The separation device and its usage method for MBR membrane treatment in wastewater treatment plants, as described in this invention, utilizes a speed-regulating flushing component. By changing the speed limiter, the efficiency of gas ejection within the speed limiter changes. In practical applications, the change in gas ejection efficiency leads to a change in the impact effect of the gas on the membrane. This change in impact force enhances the flushing effect and range on sludge. Furthermore, by adjusting the control law of the speed limiter in practical applications, the flexibility of gas flushing is further enhanced.

[0032] 2. The separation device and its usage method for MBR membrane treatment in wastewater treatment plants described in this invention, through the design of the scraper shape, results in a small contact area between the scraper and the membrane. At the same time, the inclined jet micro-holes cause the airflow to have a large impact area on the membrane. Simultaneously, when the scraper rises, it scrapes the activated sludge. Under the action of gravity, the activated sludge falls downward along the arc of the scraper, reducing the degree of sludge accumulation on the scraper and reducing the degree of obstruction to the scraper's movement. Attached Figure Description

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Figure 1 This is a perspective view of the present invention;

[0035] Figure 2 This is a perspective view of the present invention from another angle;

[0036] Figure 3 This is a breakdown diagram of multiple membrane plates;

[0037] Figure 4 It is a 3D diagram of the aeration pipe;

[0038] Figure 5 This is a diagram showing the internal structure of the power chamber and transmission box;

[0039] Figure 6 This is a partial cross-sectional view of the aeration pipe;

[0040] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0041] Figure 8 This is a partial sectional view of the scraper;

[0042] Figure 9 This is a flowchart of the method of the present invention;

[0043] In the diagram: 1. Membrane box; 11. Membrane plate; 12. Frame; 13. Membrane sheet; 14. Water collection pipe; 15. Water outlet pipe; 2. Aeration pipe; 21. Air outlet; 22. Speed ​​limiter pipe; 23. Pipe body; 24. Speed ​​limiter plug; 25. Elastic rope; 26. Adjusting rod; 27. Adjusting block; 3. Power chamber; 31. Wind wheel; 32. Transmission box; 33. Pulley; 4. Telescopic rod; 41. Scraper; 42. Spray micro-hole. Detailed Implementation

[0044] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0045] like Figures 1 to 9 As shown, the separation device for MBR membrane treatment in a wastewater treatment plant according to the present invention includes a membrane box 1, wherein the membrane box 1 is a frame 12 type structure;

[0046] The membrane plate 11 is designed in multiples and stacked in the membrane box 1. The membrane plate 11 is fixedly connected to the membrane sheet 13 by the frame 12.

[0047] Water collection pipe 14, which is fixedly installed on membrane plate 11, is used to collect water produced by membrane plate 11;

[0048] Water outlet pipe 15, which is connected to water collection pipe 14, and a water suction device is connected to the end of water outlet pipe 15 away from water collection pipe 14.

[0049] It also includes an aeration pipe 2, which is installed at the bottom of the membrane box 1 and is connected to an aeration pump for pumping air into the membrane box 1.

[0050] A speed-regulating flushing component is installed on the aeration pipe 2. The speed-regulating flushing component is used to adjust the air outlet rate of the aeration pipe 2, thereby adjusting the flushing effect on the membrane 13.

[0051] The speed-regulating flushing assembly includes an air outlet 21, which is opened on the aeration pipe 2 and corresponds to the gap between the air outlet 21 and the membrane plate 11.

[0052] Speed ​​limiter 22, which is installed inside the air outlet 21, has an adjustable inner diameter and is used to control the air outlet rate of the air outlet 21.

[0053] In the wastewater treatment process of pharmaceutical plants, flat-sheet MBR membrane treatment is often used to purify the wastewater. During the purification process, the wastewater comes into contact with activated sludge in the purification tank. Under the action of the activated sludge, impurities in the wastewater undergo biological reaction treatment to reduce ammonia nitrogen levels and other indicators. Subsequently, the membrane module separates the water from the activated sludge and macromolecular organic matter, outputting purified water, eliminating the need for a secondary sedimentation tank. However, in the actual filtration and separation process, activated sludge and macromolecular organic matter are intercepted on the surface of the membrane module, which not only negatively impacts the water throughput efficiency of the membrane module but also affects the biochemical treatment of the wastewater. Therefore, during the normal use of flat-sheet MBR membranes, regular cleaning of the membrane module is required, along with the flushing action of the aeration device, to maintain the normal operation of the membrane module.

[0054] To enhance the flushing and cleaning effect of the gas sprayed by the aeration device on the membrane module, this invention improves the combination of the aeration device and the membrane module. In daily water purification processes, this enhances the cleaning effect on sludge. Specifically, during wastewater treatment, after wastewater and activated sludge are mixed and subjected to biochemical treatment by the activated sludge, the wastewater moves into the membrane tank 1. At this time, the external water suction equipment is activated, and under negative pressure, the water flows into the gaps of the membrane plates 11. After being filtered and separated by the membrane sheets 13, the water is guided by the water collection pipe 14 and finally collected in the outlet pipe 15 for discharge to the outside. Simultaneously, the aeration pump delivers air to the aeration pipe 2, which, after being restricted by the speed limiting pipe 22 installed in the air outlet 21, delivers it into the gaps of the membrane plates 11. The gas is sprayed onto the surface of the membrane sheets 13 in the form of bubbles. During the upward movement of the gas... The gas provides oxygen to the microorganisms in the activated sludge, enabling the activated sludge to perform normal biochemical treatment of wastewater. On the other hand, during the gas injection process, the sludge on the surface of the membrane 13 is impacted, and under the assistance of gravity, the activated sludge is detached. The detached activated sludge is then mixed with the wastewater again to purify the wastewater. At the same time, during the long-term wastewater purification process, the inner diameter of the speed limiting pipe 22 is adjusted so that the gas rate injected from the speed limiting pipe 22 changes during the constant power operation of the aeration pump, thereby adjusting the impact effect on the membrane 13. The varying impact force impacts the sludge, enhancing the efficiency of sludge detachment. Furthermore, when the gas injection intensity changes, the gas impact range also changes, which in turn changes the treatment range of the membrane 13 during the gas injection rate change, thereby enhancing the scouring and separation effect on the membrane 13.

[0055] It should be noted that in this embodiment, the speed limiter 22 is a device that controls the gas flow efficiency by changing the conduction diameter. In actual adjustment, it can be adjusted one by one so that the flow rate of several speed limiters 22 in a certain area is larger, so that the airflow impact efficiency between some diaphragms 13 is higher, so that the gas flow efficiency between diaphragms 13 changes, thereby enhancing the scouring effect on diaphragms 13.

[0056] This invention, by setting up a speed-regulating flushing component, utilizes the change in the speed limiter tube 22 to change the gas ejection efficiency within the speed limiter tube 22. In practical applications, the change in gas ejection efficiency causes a change in the impact effect of the gas on the diaphragm 13. During the process of changing the impact force, the flushing effect on the sludge and the flushing range are enhanced. At the same time, in practical applications, by adjusting the control law of the speed limiter tube 22, the flexibility of gas flushing is further enhanced.

[0057] In a preferred embodiment of the present invention, the speed limiting tube 22 is composed of a tube body 23 and a speed limiting plug 24. The tube body 23 is fixedly installed in the air outlet 21, and the speed limiting plug 24 is slidably installed in the tube body 23. The inner cavity of the tube body 23 has a stepped design, and the speed limiting plug 24 has a T-shaped structure. The speed limiting plug 24 and the inner cavity of the tube body 23 are elastically connected by an elastic rope 25. The bottom of the speed limiting plug 24 extends into the inner cavity of the aeration tube 2. A batch adjustment component is installed in the aeration tube 2, and the batch adjustment component pushes the speed limiting plug 24 to move in batches.

[0058] In this embodiment, the speed limiting tube 22 is preferably composed of a tube body 23 and a speed limiting plug 24. When not adjusted, the speed limiting plug 24 is slidably connected to the inner cavity of the tube body 23 through an elastic rope 25. When the aeration pump is started, under the action of air pressure, the speed limiting plugs 24 in multiple tube bodies 23 move outward from the tube body 23, causing the tube body 23 to open. The opening degree of the speed limiting tube 22 changes synchronously according to the air pressure intensity in the aeration tube 2, so that the jet airflow rate in multiple speed limiting tubes 22 is the same. Therefore, in specific implementation, by adjusting the power of the aeration pump, the jet airflow efficiency can be adjusted synchronously. At the same time, after the power of the aeration pump is fixed, the batch adjustment component is started. The batch adjustment component is used to push the speed limiting plug 24 to move in batches, so that the opening degree of the corresponding part of the speed limiting tube 22 increases. The jet airflow jet efficiency in the speed limiting tube 22 with a larger opening degree increases, and the scouring effect on the diaphragm 13 is enhanced.

[0059] In a preferred embodiment of the present invention, the T-shaped diameter of the speed limiter 24 is made of a rubber sheet at its largest end, and the diameter of the speed limiter 24 is smaller as the distance between the speed limiter 24 and the step inside the tube 23 increases.

[0060] By adjusting the specific structure of the speed limiter 24, when the speed limiter 24 moves under the action of air pressure or the batch adjustment component, as the moving distance of the speed limiter 24 increases, the tension of the speed limiter 24 on the elastic rope 25 increases, which in turn causes the end of the speed limiter 24 to deform. The diameter of the deformed speed limiter 24 decreases, the interception efficiency of the airflow decreases, and the adjustment range of the airflow velocity in the speed limiter tube 22 is further increased.

[0061] In a preferred embodiment of the present invention, the batch adjustment component includes an adjusting rod 26, which is rotatably installed in the aeration pipe 2, and the adjusting rod 26 is a reciprocating screw.

[0062] Adjusting block 27, which is screw-driven with adjusting rod 26, and the adjusting block 27 reciprocates in the aeration pipe 2;

[0063] When the power of the aeration pump is fixed, the efficiency of delivering airflow into the aeration pipe 2 is also fixed. Under the action of air pressure, the speed limiting plug 24 pulls the elastic rope 25, causing the speed limiting pipe 22 to open. At the same time, the adjusting rod 26 rotates. During the rotation, the adjusting rod 26, through the helical transmission between it and the adjusting block 27, causes the adjusting block 27 to produce linear reciprocating motion on the adjusting rod 26. When the adjusting block 27 moves, it pushes the speed limiting plug 24, increasing the moving distance of the corresponding speed limiting plug 24, thereby increasing the speed limiting pipe aligned with the adjusting block 27. As the opening degree of 22 increases, the opening degrees of multiple speed limiting tubes 22 differ. When the air intake efficiency of aeration tube 2 is fixed, the gas can be ejected more concentratedly from the speed limiting tube 22 with a larger opening degree, thereby enhancing the scouring effect of the corresponding speed limiting tube 22 on the diaphragm 13. During the linear reciprocating motion of the adjusting block 27, the opening degree of the speed limiting tube 22 increases in batches, thereby ensuring that multiple diaphragms 13 are scouring by strong airflow within one cycle of the adjusting block 27, thus enhancing the scouring effect on the diaphragm 13.

[0064] In a preferred embodiment of the present invention, a power chamber 3 is provided in the middle of the aeration pipe 2. The inner cavity of the power chamber 3 is connected to the inner cavity of the aeration pipe 2. A wind turbine 31 is rotatably installed in the power chamber 3. Some of the blades of the wind turbine 31 are located on the airflow path in the aeration pipe 2. The wind turbine 31 is connected to the adjusting rod 26 by belt drive.

[0065] The airflow is pumped into the aeration pipe 2 by the aeration pump and flows along the aeration pipe 2. The airflow flows into the power chamber 3 from the aeration pipe 2 and flows back into the aeration pipe 2 along the power chamber 3, giving the impeller 31 a driving force, causing the impeller 31 to rotate. Since the shaft of the impeller 31 is connected to the adjusting rod 26 by belt drive, the rotation of the impeller 31 will drive the adjusting rod 26 to rotate, thereby providing power for the movement of the adjusting block 27.

[0066] In a preferred embodiment of the present invention, a transmission box 32 is fixedly installed on the aeration pipe 2, and the impeller 31 and the adjusting rod 26 both extend into the transmission box 32. The impeller 31 and the adjusting rod 26 are detachably mounted with pulleys 33 at one end inside the transmission box 32, and the pulleys 33 inside the transmission box 32 are connected by a belt.

[0067] The shaft of the impeller 31 and the adjusting rod 26 are both extended into the transmission box 32, and the pulley 33 is detachably installed. In actual application, according to the transmission ratio required in the design process, the pulley 33 of different diameters can be replaced to adjust the transmission efficiency between the impeller 31 and the adjusting rod 26. Therefore, when the power of the aeration pump is fixed, the movement speed of the adjusting block 27 can be adjusted by replacing the pulley 33 before use, thereby adjusting the adjustment speed of multiple speed limiting pipes 22, and thus adjusting the duration of the strong airflow acting on the diaphragm 13 once, thereby enhancing the scouring effect on the diaphragm 13.

[0068] In a preferred embodiment of the present invention, the aeration pipes 2 are designed in multiples, and the portions of the multiple aeration pipes 2 located inside the membrane box 1 are parallel to each other, while the portions located outside the membrane box 1 are interconnected. A telescopic rod 4 is fixedly installed at the top of the speed limiting pipe 22, and the ends of multiple telescopic rods 4 located in the same gap of the membrane plate 11 are jointly fixedly connected to a scraper 41. Both the telescopic rod 4 and the scraper 41 are hollow, and the inner cavities of the speed limiting pipe 22, the telescopic rod 4 and the scraper 41 are interconnected. The bottom of the scraper 41 is provided with uniformly distributed spray microholes 42.

[0069] During the process of adjusting the opening degree of the speed limiter 22 in batches, the airflow is more efficient when flowing out of the speed limiter 22 with a larger opening degree. The airflow flows from the speed limiter 22 into the inner cavity of the telescopic rod 4 and the scraper 41, and is sprayed outward along the injection micro-holes 42. Since the diameter of the injection micro-holes 42 is not adjustable, the airflow converges in the telescopic rod 4 and the scraper 41, pushing the telescopic rod 4 to extend. This causes the telescopic rod 4 to drive the scraper 41 to move upward. During the upward movement of the scraper 41, the large volume of sludge on the diaphragm 13 is pushed, causing the large volume of sludge to fall off. Furthermore, during the movement of the scraper 41, the jet micro-holes 42 impact the scraped membrane 13 with airflow, further rinsing the activated sludge on the membrane 13 and thus enhancing the cleaning effect on the membrane 13. When the regulating block 27 continues to move and is misaligned with the current speed limiter 22, the efficiency of airflow into the telescopic rod 4 decreases. Under the action of gravity, the scraper 41 moves downward, pushing the telescopic rod 4 to contract, which in turn causes the jet micro-holes 42 to descend. The bubbles ejected through the jet micro-holes 42 move upward from the bottom of the membrane 13, replenishing oxygen to the activated sludge.

[0070] In a preferred embodiment of the present invention, the cross-section of the scraper 41 is C-shaped and the spray micro-holes 42 are all inclined.

[0071] The scraper 41 has an overall arc-shaped design, with a higher middle and lower ends;

[0072] The design of the scraper 41 results in a small contact area between the scraper 41 and the membrane 13. At the same time, the inclined jet micro-holes 42 result in a large impact area of ​​the airflow on the membrane 13. When the scraper 41 rises, it scrapes the activated sludge. Under the action of gravity, the activated sludge falls downward along the arc of the scraper 41, reducing the degree of sludge accumulation on the scraper 41 and reducing the degree of obstruction to the movement of the scraper 41.

[0073] A method for using a separation device for MBR membrane treatment in a wastewater treatment plant, the method comprising the following steps:

[0074] S1. Installation: Install the device in the sewage purification tank, connect the aeration pipe 2 to the aeration pump and the water outlet pipe 15 to the water suction equipment, and simultaneously power on the device.

[0075] S2. Debugging: Open the transmission box 32, replace the pulley 33 and belt, and adjust the transmission ratio between the impeller 31 and the adjusting rod 26 by the ratio of the diameter of the pulley 33 in the transmission box 32.

[0076] S3, Separation: The water suction equipment is started, and the sewage is discharged after being filtered and separated by membrane 13. Sludge, impurities and other contaminants are intercepted on the surface of membrane 13.

[0077] S4. Flushing: The aeration pump starts and delivers airflow into the aeration pipe 2. After being guided by the speed limiting pipe 22 and the telescopic rod 4, the airflow impacts the membrane 13 through the spray micro-holes 42 at the bottom of the scraper 41, removing the sludge from the surface of the membrane 13.

[0078] S5. Diffusion: The airflow drives the impeller 31 to rotate, which in turn drives the regulating rod 26 to rotate and the regulating block 27 to move linearly. When the regulating block 27 moves, it pushes the speed limiter 24 to move upward, increasing the airflow velocity. The scraper 41 moves up and down under the action of air pressure, enhancing the cleaning effect on the diaphragm 13.

[0079] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A separation device for MBR membrane treatment in a wastewater treatment plant, comprising a membrane box (1), wherein the membrane box (1) is a frame (12) type structure; A membrane plate (11) is designed in multiples and stacked in a membrane box (1). The membrane plate (11) is fixedly connected to the membrane sheet (13) by a frame (12). Water collection pipe (14), which is fixedly installed on membrane plate (11) for collecting water produced by membrane plate (11); Water outlet pipe (15) is connected to water collection pipe (14), and a water suction device is connected to the end of water outlet pipe (15) away from water collection pipe (14). Its features are: It also includes an aeration pipe (2), which is installed at the bottom of the membrane box (1) and is connected to an aeration pump for pumping air into the membrane box (1); Speed-regulating flushing assembly, which is installed on the aeration pipe (2), is used to adjust the air outlet rate of the aeration pipe (2), thereby adjusting the flushing effect on the membrane (13). The speed-regulating flushing assembly includes an air outlet (21), which is opened on the aeration pipe (2) and the gap between the air outlet (21) and the membrane plate (11) corresponds to the gap between the air outlet (21) and the membrane plate (11). Speed ​​limiter (22), the speed limiter (22) is installed in the air outlet (21), the inner diameter of the speed limiter (22) is adjustable, the speed limiter (22) is used to control the air outlet rate of the air outlet (21); The speed limiting tube (22) consists of a tube body (23) and a speed limiting plug (24). The tube body (23) is fixedly installed in the air outlet (21), and the speed limiting plug (24) is slidably installed in the tube body (23). The inner cavity of the tube body (23) is designed in a stepped shape, and the speed limiting plug (24) is a T-shaped structure. The speed limiting plug (24) and the inner cavity of the tube body (23) are elastically connected by an elastic rope (25). The bottom of the speed limiting plug (24) extends into the inner cavity of the aeration tube (2). A batch adjustment component is installed in the aeration tube (2), and the batch adjustment component pushes the speed limiting plug (24) to move in batches. The T-shaped diameter of the speed limiter (24) is made of rubber sheet at its largest end, and the diameter of the speed limiter (24) is smaller as the distance between the speed limiter (24) and the inner cavity step of the tube body (23) increases. The batch adjustment assembly includes an adjusting rod (26), which is rotatably installed in the aeration pipe (2). The adjusting rod (26) is a reciprocating screw. Adjusting block (27), which is screwed to the adjusting rod (26), and the adjusting block (27) reciprocates in the aeration pipe (2).

2. The separation device for MBR membrane treatment in a wastewater treatment plant according to claim 1, characterized in that: A power chamber (3) is provided in the middle of the aeration pipe (2). The inner cavity of the power chamber (3) is connected to the inner cavity of the aeration pipe (2). A wind wheel (31) is rotatably installed in the power chamber (3). Some of the fan blades of the wind wheel (31) are located on the airflow path in the aeration pipe (2). The wind wheel (31) is connected to the adjusting rod (26) by belt drive.

3. A separation device for MBR membrane treatment of sewage plants according to claim 2, characterized in that A transmission box (32) is fixedly installed on the aeration pipe (2). The impeller (31) and the adjusting rod (26) both extend into the transmission box (32). The impeller (31) and the adjusting rod (26) are detachably mounted with pulleys (33) at one end inside the transmission box (32). The pulleys (33) inside the transmission box (32) are connected by a belt.

4. The separation device for MBR membrane treatment of sewage plants according to claim 3, characterized in that The aeration pipes (2) are designed in multiples, and the portions of the aeration pipes (2) located inside the membrane box (1) are parallel to each other, while the portions located outside the membrane box (1) are interconnected. A telescopic rod (4) is fixedly installed at the top of the speed limiting pipe (22). The ends of the multiple telescopic rods (4) located in the same gap of the membrane plate (11) are fixedly connected to a scraper (41). Both the telescopic rod (4) and the scraper (41) are hollow, and the inner cavities of the speed limiting pipe (22), the telescopic rod (4) and the scraper (41) are interconnected. The bottom of the scraper (41) is provided with uniformly distributed spray microholes (42).

5. A separation device for MBR membrane treatment of sewage plants according to claim 4, characterized in that The cross-section of the scraper (41) is C-shaped, and the spray micro-holes (42) are all inclined.

6. A separation device for MBR membrane treatment of sewage plants according to claim 5, characterized in that The scraper (41) has an overall arc-shaped design, with a high middle and low ends.

7. A method of using a separation device for MBR membrane treatment of sewage plants, characterized by This method is applicable to the separation device for MBR membrane treatment in a wastewater treatment plant as described in claim 6, and the method includes the following steps: S1. Installation: Install the device in the sewage purification tank, so that the aeration pipe (2) is connected to the aeration pump and the water outlet pipe (15) is connected to the water suction equipment, and simultaneously power on the device. S2. Debugging: Open the transmission box (32), replace the pulley (33) and belt, and adjust the transmission ratio between the impeller (31) and the adjusting rod (26) by the ratio of the diameter of the pulley (33) in the transmission box (32); S3, Separation: The water suction equipment is started, and the sewage is discharged after being filtered and separated by the membrane (13). Sludge and impurities are intercepted on the surface of the membrane (13). S4, flushing: The aeration pump starts and delivers airflow into the aeration pipe (2). After being guided by the speed limiting pipe (22) and the telescopic rod (4), the airflow impacts the membrane (13) through the spray micro-holes (42) at the bottom of the scraper (41) to remove the sludge from the surface of the membrane (13). S5. Diffusion: The airflow drives the impeller (31) to rotate, and after transmission, it drives the adjusting rod (26) to rotate and the adjusting block (27) to move linearly. When the adjusting block (27) moves, it pushes the speed limiter (24) to move upward, the airflow velocity increases, and the scraper (41) moves up and down under the action of air pressure, which enhances the cleaning effect on the diaphragm (13).

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