A MBR membrane pack

Abstract

The application relates to the field of sewage treatment equipment, in particular to an MBR (Membrane Bioreactor) membrane group device which comprises a membrane frame and a plurality of membrane elements fixedly installed on the membrane frame, a gas supply assembly and a plurality of gas aeration boxes with downwardly-opening openings are fixedly installed on the bottom side of the membrane frame, the gas supply assembly is used for blowing air into the inside of each gas aeration box, a gas aeration head is arranged on the top side of the gas aeration box, the gas aeration head is fixedly connected with an exhaust pipe, the exhaust pipe is fixedly penetrated through the top side of the gas aeration box, an upwardly-opening shielding cover is fixedly installed in the inside of the gas aeration box, the shielding cover is sleeved with the part of the exhaust pipe located in the inside of the gas aeration box, a mounting plate is embedded on the bottom side of the shielding cover, a plurality of sludge discharge openings are formed in the mounting plate, a shaft rod is rotatably installed on the bottom side of the mounting plate, a plurality of shielding plates are fixedly installed on the shaft rod, the shaft rod is rotated to drive the shielding plates to shield the sludge discharge openings, and a driving mechanism is installed on the shaft rod and used for driving the shaft rod to rotate. The application has the effect of improving the flushing effect of air on the membrane elements.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment, and in particular to an MBR membrane module. Background Technology

[0002] With increasing environmental awareness and growing water scarcity, MBR membrane modules, as a highly efficient, energy-saving, and environmentally friendly wastewater treatment technology, are widely used in the treatment of industrial wastewater, municipal sewage, medical wastewater, and other fields.

[0003] Currently, a related technology discloses an MBR membrane module, including a membrane frame and multiple membrane elements fixedly installed on the frame. An aeration pipe and multiple aeration boxes are fixedly installed on the bottom side of the membrane frame, with the aeration pipe located below the aeration boxes. Multiple vent holes are opened on the top side of the aeration pipe. A U-shaped tube is installed inside the aeration box, with one end higher than the other. An aeration head is installed on the top side of the aeration box, and the high end of the U-shaped tube is fixedly connected to the aeration head after passing through the top side of the aeration box. The aeration pipe is connected to an aeration pump, which draws air into the aeration pipe. The air then enters the aeration box through the vent holes and accumulates on the top side of the aeration box. As the air accumulates inside the aeration box, the wastewater inside the aeration box is discharged from the bottom. When the water level inside the aeration box is lower than the bottom side of the U-shaped tube, air is discharged from the U-shaped tube through a siphon principle. The air discharged from the U-shaped tube diffuses through the aeration head, and then moves upward to flush the sludge adhering to the membrane elements, thereby reducing membrane element clogging.

[0004] However, wastewater enters the U-tube, where sludge settles. Each time air exits the U-tube, it flushes out the settled sludge, causing it to accumulate between adjacent membrane elements. This increased sludge volume between elements generally leads to more sludge re-adhering to the membrane elements, thus reducing the effective flushing of the membrane elements by the air. Summary of the Invention

[0005] To improve the scouring effect of air on membrane elements, this application provides an MBR membrane module.

[0006] This application provides an MBR membrane module, which adopts the following technical solution:

[0007] An MBR membrane module includes a membrane frame and multiple membrane elements fixedly mounted on the membrane frame. An air supply assembly and multiple downward-facing aeration boxes are fixedly mounted on the bottom side of the membrane frame. The air supply assembly is used to blow air into each of the aeration boxes. An aeration head is provided on the top side of each aeration box, and an exhaust pipe is fixedly connected to the aeration head. The exhaust pipe is fixedly inserted through the top side of the aeration box. An upward-facing shield is fixedly mounted inside each aeration box, and the shield is fitted over the portion of the exhaust pipe located inside the aeration box. A mounting plate is embedded in the bottom side of the shield, and the mounting plate has multiple sludge discharge ports. A shaft is rotatably mounted on the bottom side of the mounting plate, and multiple shields are fixedly mounted on the shaft. Rotation of the shaft drives the shields to block the sludge discharge ports. A drive mechanism is mounted on the shaft for driving the shaft to rotate.

[0008] By adopting the above technical solution, after the air supply component is connected to the aeration pump, the aeration pump is started, and air enters each aeration box from the air supply component. As the air inside the aeration box increases, the water level inside the aeration box drops. After the water level inside the aeration box is lower than the bottom of the exhaust pipe, the air inside the aeration box enters the aeration head from the exhaust pipe through the siphon principle. Then the air is sprayed from the aeration head onto the membrane element for flushing. After the air inside the aeration box is discharged, the sewage re-enters the aeration box, thus stopping aeration. After the air is stored in the aeration box, it is sprayed out together again. The impact force of the air sprayed from the aeration head is large, thereby increasing the flushing effect of the air on the membrane element.

[0009] When the water level inside the aeration box is higher than the bottom of the exhaust pipe, the drive mechanism rotates the shaft, which in turn moves the baffle plate away from the sludge discharge port, facilitating the discharge of sludge from inside the baffle and reducing the amount of sludge inside. Before the water level inside the aeration box drops below the bottom of the exhaust pipe, the drive mechanism rotates the shaft, which in turn moves the baffle plate to block the sludge discharge port, thus facilitating its sealing. When air from inside the aeration box is discharged from the aeration head, the sludge inside the baffle has already been discharged from the sludge discharge port, resulting in less sludge inside the baffle. This reduces the amount of sludge carried by the air as it exits the aeration head, thereby improving the scouring effect of the air on the membrane element.

[0010] Optionally, the air supply assembly includes an air supply pipe and an air supply trough. The opening of the air supply trough faces downward. The air supply trough is fixedly installed on the bottom side of the membrane frame. The air supply trough is located inside the aeration box. One end of the air supply pipe is fixedly connected to one end of the air supply trough. Multiple exhaust holes are provided on both sides of the air supply trough.

[0011] By adopting the above technical solution, after the air supply pipe is connected to the aeration pump, the aeration pump sends air into the air supply pipe. The air inside the air supply pipe enters the air supply tank, and then the air inside the air supply tank is discharged from the exhaust port and enters the aeration box, thus facilitating the supply of air to the aeration box. The exhaust port is located on the side wall of the air supply tank, and the sludge inside the air supply tank will be discharged from the bottom opening, which may cause the exhaust port to become blocked.

[0012] Optionally, the driving mechanism includes a counterweight sleeve, a slider, and a lifting assembly. The counterweight sleeve is sleeved on the shaft, the slider is fixedly installed on the inner wall of the counterweight sleeve, the shaft has a groove for the slider to slide, the groove is inclined, and the lifting assembly is used to drive the counterweight sleeve to move up and down.

[0013] By adopting the above technical solution, the lifting assembly drives the counterweight sleeve to rise, which in turn drives the slider to rise. The slider slides upward within the slide groove, and the inclined design of the slide groove causes the shaft to rotate in one direction. Conversely, the lifting assembly drives the counterweight sleeve to fall, which in turn drives the slider to fall. The slider slides downward within the slide groove, and the inclined design of the slide groove causes the shaft to rotate in the other direction. The lifting assembly's ability to raise and lower the counterweight sleeve facilitates the rotation of the shaft.

[0014] Optionally, the lifting assembly includes a vertical rod, a limiting block, a horizontal rod, and a float. One end of the horizontal rod is fixedly connected to the outer wall of the counterweight sleeve, the other end of the horizontal rod is fixedly connected to the bottom end of the vertical rod, the top end of the vertical rod is fixedly connected to the float, the limiting block is fixedly installed on the outer wall of the shield, and the vertical rod slides through the limiting block.

[0015] By adopting the above technical solution, the limiting block restricts the vertical rod from rotating around the shaft, thereby facilitating the restriction of the counterweight sleeve's rotation around the shaft. When the water level inside the aeration box rises, the float drives the counterweight sleeve upwards via the horizontal and vertical rods, thus facilitating the upward movement of the counterweight sleeve. When the water level inside the aeration box drops, the weight of the float is applied to the counterweight sleeve via the horizontal and vertical rods, thus facilitating the downward movement of the counterweight sleeve.

[0016] Optionally, a first airbag is fixedly embedded along the edge of the top side of the baffle plate, and a second airbag is fixedly installed on the shaft. The shaft has a ventilation hole for connecting the first airbag and the second airbag. The second airbag is located below the counterweight sleeve, and the counterweight sleeve is raised and lowered to compress the second airbag.

[0017] By adopting the above technical solution, when the counterweight sleeve descends, the shaft rotates, causing the baffle plate to block the sludge discharge port. Simultaneously, the counterweight sleeve compresses the second airbag, allowing air from inside the second airbag to enter the first airbag, thus inflating the first airbag. After inflating, the first airbag seals the gap between the baffle plate and the mounting plate, thereby improving the sealing performance of the baffle plate after blocking the sludge discharge port.

[0018] As the counterweight sleeve rises, the shaft causes the baffle plate to shift away from the sludge discharge port, and the counterweight sleeve releases the second air bladder. Air from inside the first air bladder enters the second air bladder, causing the first air bladder to shrink. After the first air bladder shrinks, the frictional resistance between the baffle plate and the mounting plate decreases, thus facilitating the counterweight sleeve to drive the shaft to rotate.

[0019] Optionally, a third airbag is fixedly installed on the top side of the aeration box, and an air outlet communicating with the third airbag is opened on the top side of the aeration box.

[0020] By adopting the above technical solution, the third airbag helps to increase the air storage capacity inside the aeration box, thereby increasing the duration of air ejection from the aeration head and thus improving the scouring effect of the air on the membrane element. Simultaneously, when the air inside the aeration box is discharged from the aeration head, the wastewater compresses the third airbag, thereby accelerating the impact force of the air discharged from the aeration head and further improving the scouring effect of the air on the membrane element.

[0021] Optionally, the vent is located directly above the float.

[0022] By adopting the above technical solution, when the air inside the aeration box is discharged from the aeration head, the air inside the third air bladder is sprayed into the aeration box from the air outlet. The air sprayed from the air outlet impacts the float, thereby increasing the downward pressure on the counterweight sleeve and reducing the likelihood of the counterweight sleeve moving upward due to water flow disturbance.

[0023] Optionally, the third airbag is annular, and a first support ring is fixedly installed on the top side of the aeration box, with the outer periphery of the first support ring being fixedly connected to the inner periphery of the third airbag.

[0024] By adopting the above technical solution, the sludge will accumulate on the top side of the third airbag during sedimentation. When the air inside the third airbag is discharged from the air outlet, the third airbag shrinks. With the support of the first support ring, the inner circumference of the third airbag is higher than the outer circumference, and the top side of the third airbag is tilted, which facilitates the sludge to fall from the top side of the third airbag.

[0025] Optionally, the mounting plate has a groove in the portion between two adjacent sludge discharge ports, and an elastic membrane is fixedly installed in the groove.

[0026] By employing the above technical solution, as wastewater enters the shield, it compresses the elastic membrane, causing it to deform and indent into the groove. When air enters the shield and exits through the exhaust pipe, the high airflow above the elastic membrane causes it to bulge upwards. This repeated indentation and bulging of the elastic membrane facilitates the removal of sludge from it.

[0027] Optionally, an elastic sheet is fixedly installed between the elastic membrane and the bottom of the groove, and a push rod is fixedly installed on the bottom side of the elastic membrane. The bottom end of the push rod is hemispherical, and a through hole is provided in the bottom of the groove for the push rod to pass through.

[0028] By adopting the above technical solution, when the baffle plate and the sludge discharge port are misaligned, the baffle plate presses against the bottom end of the push rod, causing the push rod to move upward and push the elastic membrane to bulge. The bulging of the elastic membrane facilitates the movement of sludge on it towards the sludge discharge port for discharge. When the baffle plate blocks the sludge discharge port, the elastic sheet causes the elastic membrane to return to its original position.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. As air is introduced into the aeration box, causing the water level inside the aeration box to gradually decrease, the drive mechanism drives the shaft to rotate. The shaft causes the baffle plate to first be offset from the sludge discharge port. Then, the sludge inside the baffle plate is discharged from the sludge discharge port, thereby reducing the amount of sludge settled inside the baffle plate. Afterward, the drive mechanism drives the shaft to rotate again, causing the baffle plate to block the sludge discharge port. When the baffle plate blocks the sludge discharge port and the water level inside the aeration box is lower than the bottom of the exhaust pipe, the air inside the aeration box is discharged from the exhaust pipe into the aeration head. The air is then sprayed from the aeration head onto the membrane element. The amount of sludge inside the baffle plate is small, thus the amount of sludge carried by the air sprayed from the aeration head onto the membrane element is small, thereby improving the scouring effect of the air on the membrane element.

[0031] 2. By increasing the amount of air contained in the aeration box through the third airbag, the duration and impact force of air ejected from the aeration head are increased, thereby improving the scouring effect of air on the membrane element. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0033] Figure 2 This is an exploded view of the aeration box and the air supply mechanism in Embodiment 1 of this application;

[0034] Figure 3 This is a top view of the aeration box of Embodiment 1 of this application;

[0035] Figure 4 yes Figure 3 Sectional view at AA;

[0036] Figure 5 This is a schematic diagram of the structure between the aeration head, exhaust pipe, shield and drive mechanism in Embodiment 1 of this application;

[0037] Figure 6 yes Figure 4 Enlarged view at point A;

[0038] Figure 7 This is an exploded view of the counterweight sleeve and shaft in Embodiment 1 of this application;

[0039] Figure 8 This is a schematic diagram of the structure between the mounting plate and the shielding plate in Embodiment 2 of this application;

[0040] Figure 9 This is an exploded view of the mounting plate and the shielding plate in Embodiment 2 of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Membrane frame; 2. Membrane element; 3. Exhaust port; 4. Air supply assembly; 41. Air supply pipe; 42. Air supply trough; 5. Aeration box; 6. Aeration head; 7. Exhaust pipe; 8. Shield; 9. Connecting rod; 10. Mounting plate; 11. Sludge discharge port; 12. Shaft; 13. Shield; 14. Drive mechanism; 141. Counterweight sleeve; 142. Sliding block; 143. Lifting assembly; 1431. Vertical rod; 1432. Limiting block; 1433. Horizontal rod; 1434. Float; 15. Slide groove; 16. First airbag; 17. Second airbag; 18. Third airbag; 19. Vent; 20. First support ring; 21. Second support ring; 22. Air outlet; 23. Ring groove; 24. Groove; 25. Elastic membrane; 26. Elastic sheet; 27. Push rod; 28. Through hole. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0043] Example 1

[0044] This application discloses an MBR membrane module.

[0045] Reference Figure 1 An MBR membrane module includes a membrane frame 1 and a plurality of membrane elements 2 fixedly mounted on the membrane frame 1. The membrane elements 2 are arranged at intervals on the membrane frame 1.

[0046] Reference Figure 1 , Figure 2An air supply assembly 4 is fixedly installed on the bottom side of the membrane frame 1. The air supply assembly 4 includes an air supply pipe 41 and an air supply trough 42. The air supply trough 42 is fixedly installed on the bottom side of the membrane frame 1, with its opening facing downwards. One end of the air supply pipe 41 is fixedly connected to one end of the air supply trough 42, and the other end of the air supply pipe 41 is used to connect to an aeration pump. Multiple exhaust holes 3 are provided on both sides of the air supply trough 42.

[0047] The aeration pump is started, which sends air into the air supply pipe 41, and then the air supply pipe 41 sends air into the air supply tank 42. The air inside the air supply tank 42 is discharged from the exhaust port 3. The air discharged from the exhaust port 3 moves upward in the sewage, and then the air enters between two adjacent membrane elements 2, thereby facilitating the air to wash away the sludge adhering to the membrane elements 2.

[0048] Vent holes 3 are located on both sides of the venting tank, thereby reducing the occurrence of sludge settling and clogging the vent holes 3. At the same time, sludge inside the air supply tank 42 is discharged from the bottom opening, thereby reducing the occurrence of sludge accumulation inside the water supply tank.

[0049] Reference Figure 1 , Figure 2 Multiple aeration boxes 5 are fixedly installed on the bottom side of the membrane frame 1. An air supply trough 42 passes through each aeration box 5 and is located inside the aeration box 5. After the air is discharged from the exhaust port 3, the air moves upward inside the aeration box 5 and then accumulates on the inner top wall of the aeration box 5.

[0050] Reference Figure 3 , Figure 4 An aeration head 6 is provided on the top side of the aeration box 5, and an exhaust pipe 7 is fixedly connected to the aeration head 6, passing through the top side of the aeration box 5. A shield 8 is provided inside the aeration box 5, and the shield 8 is fitted over the portion of the exhaust pipe 7 located inside the aeration box 5. Multiple connecting rods 9 are fixedly installed between the top side of the shield 8 and the inner top wall of the aeration box 5, facilitating the installation of the shield 8 inside the aeration box 5.

[0051] After air is discharged from the vent 3, it accumulates on the inner top wall of the aeration box 5, thereby squeezing out the sewage inside the aeration box 5. When the water level of the sewage inside the aeration box 5 is lower than the bottom of the vent pipe 7, the air inside the aeration box 5 rushes into the shield 8, and the air inside the shield 8 is discharged from the vent pipe 7 into the aeration head 6. Then the air inside the aeration head 6 is sprayed onto the membrane element 2.

[0052] As air is sprayed from aeration head 6 onto membrane element 2, the air inside aeration box 5 decreases, and the water level rises. Once the water level inside aeration box 5 is higher than the top side of shield 8, the air inside aeration head 6 stops spraying onto membrane element 2.

[0053] By setting up an aeration box 5, a shield 8, and an air inlet pipe, air will be sprayed from the aeration head 6 to the membrane element 2 at intervals, thereby increasing the impact force of the air sprayed out by the aeration head 6 each time, and thus improving the scouring effect of the air on the membrane element 2.

[0054] Reference Figure 5 , Figure 6 , Figure 7 A mounting plate 10, circular in shape, is fixedly embedded in the bottom side of the shield 8. The mounting plate 10 has multiple sludge discharge ports 11 arranged around its center. A shaft 12 is rotatably inserted into the bottom side of the mounting plate 10, and multiple shield plates 13 are fixedly mounted on the shaft 12. Rotating the shaft 12 causes the shield plates 13 to shift away from the sludge discharge ports 11, facilitating the discharge of sludge from inside the shield 8 through the sludge discharge ports 11. Rotating the shaft 12 also causes the shield plates 13 to block the sludge discharge ports 11, facilitating their closure. After the sludge discharge ports 11 are closed, the shield 8 and the exhaust pipe 7 form a U-shaped tube, allowing air inside the aeration box 5 to be discharged through a siphon principle.

[0055] Reference Figure 5 , Figure 6 The shaft 12 is equipped with a drive mechanism 14, which drives the shaft 12 to rotate. The drive mechanism 14 includes a counterweight sleeve 141, a slider 142, and a lifting assembly 143. The counterweight sleeve 141 is sleeved on the shaft 12, and the slider 142 is fixedly installed on the inner wall of the counterweight sleeve 141. The shaft 12 has a groove 15 for the slider 142 to slide in, and the groove 15 is inclined. The lifting assembly 143 is used to drive the counterweight sleeve 141 to move up and down.

[0056] Reference Figure 5 , Figure 6 The lifting assembly 143 includes a vertical rod 1431, a limiting block 1432, a horizontal rod 1433, and a float 1434. One end of the horizontal rod 1433 is fixedly connected to the outer wall of the counterweight sleeve 141, and the other end of the horizontal rod 1433 is fixedly connected to the bottom end of the vertical rod 1431. The top end of the vertical rod 1431 is fixedly connected to the float 1434. The limiting block 1432 is fixedly installed on the outer wall of the shield 8, and the vertical rod 1431 slides through the limiting block 1432.

[0057] After the air inside the aeration box 5 stops being discharged from the aeration head 6, the wastewater re-enters the aeration box 5, resulting in a high water level inside the aeration box 5. When the water level inside the aeration box 5 is high, the float 1434 drives the counterweight sleeve 141 to move upward via the horizontal rod 1433 and the vertical rod 1431, causing the slider 142 to slide to the top of the chute 15. When the slider 142 slides to the top of the chute 15, it presses against the inner wall of the chute 15, causing the shaft 12 to rotate in one direction, thus misaligning the baffle 13 with the sludge discharge port 11, thereby facilitating the discharge of sludge from inside the baffle 8 through the sludge discharge port 11.

[0058] As air continuously accumulates inside the aeration box 5, the water level inside the aeration box 5 continuously decreases. Before the water level inside the aeration box 5 is higher than the top of the exhaust pipe 7, the weight of the float 1434 is applied to the counterweight sleeve 141 through the vertical rod 1431 and the horizontal rod 1433, thereby causing the counterweight sleeve 141 to drive the slider 142 to move downward along the chute 15. When the slider 142 slides to the bottom of the chute 15, the slider 142 and the inner wall of the chute 15 press against each other, thereby causing the shaft 12 to rotate in another direction, allowing the baffle plate 13 to block the sludge discharge port 11. When the water level of the sewage inside the aeration box 5 is lower than that of the exhaust pipe 7, the air inside the aeration box 5 is discharged from the exhaust pipe 7 and the aeration head 6 to the membrane element 2. By blocking the sludge discharge port 11, the occurrence of sewage entering the baffle 8 from the sludge discharge port 11 and blocking the bottom of the exhaust pipe 7 is reduced, thus facilitating the discharge of air inside the aeration box 5 through the siphon principle.

[0059] In another embodiment, the drive mechanism 14 is a motor, which drives the shaft 12 to rotate. Compared with the drive mechanism 14 of the other embodiment, the drive mechanism 14 of this application utilizes buoyancy to drive the shaft 12 to rotate, thereby achieving an energy-saving effect.

[0060] Reference Figure 6 , Figure 7 A first airbag 16 is fixedly embedded along the edge of the top side of the baffle plate 13, and a second airbag 17 is fixedly installed on the part of the shaft 12 located below the sliding sleeve. A vent hole 19 is provided inside the shaft 12 for connecting the first airbag 16 and the second airbag 17.

[0061] When the counterweight sleeve 141 descends, it compresses the second airbag 17, and the baffle plate 13 blocks the mud discharge port 11. After the second airbag 17 is compressed, the air inside the second airbag 17 enters the first airbag 16 through the vent 19, thereby inflating the first airbag 16. After the first airbag 16 inflates, it seals the gap between the baffle plate 13 and the mounting plate 10, thereby improving the sealing performance.

[0062] When the counterweight sleeve 141 rises, the second airbag 17 is released, and the baffle plate 13 is misaligned with the mud discharge port 11. Air inside the first airbag 16 enters the second airbag 17 through the vent 19, thereby causing the first airbag 16 to shrink. After the first airbag 16 shrinks, the frictional resistance between the baffle plate 13 and the mounting plate 10 is small, which facilitates the rotation of the drive shaft 12.

[0063] Reference Figure 4 A third airbag 18, which is annular, is fixedly installed on the top side of the aeration box 5. An air outlet 22 communicating with the third airbag 18 is provided on the top side of the aeration box 5. The air outlet 22 is located directly above the float 1434. A first support ring 20 is fixedly installed on the top side of the aeration box 5, and the outer periphery of the first support ring 20 is fixedly connected to the inner periphery of the third airbag 18.

[0064] When the air supply component 4 supplies air into the aeration box 5, the air enters the third air bladder 18 through the air outlet 22, causing the third air bladder 18 to inflate. The third air bladder 18 helps increase the amount of air stored in the aeration box 5. When the air inside the aeration box 5 is discharged from the aeration head 6, air from the third air bladder 18 enters the aeration box 5 through the air outlet 22, and then the air is ejected from the aeration head 6. The third air bladder 18 is compressed by the sewage, thereby accelerating the speed at which the air inside the aeration box 5 is discharged from the aeration head 6, thus increasing the impact force of the air ejected from the aeration head 6. By increasing the impact force of the air ejected from the aeration head 6, the scouring effect of the air on the membrane element 2 is improved.

[0065] When the air inside the third air chamber 18 is discharged and shrinks, the sewage will fill the shrinking space of the third air chamber 18, thereby disturbing the sewage. By disturbing the sewage, the air ejected from the aeration head 6 can be diffused more easily, thereby improving the uniformity of air scouring the membrane element 2.

[0066] When the sludge in the sewage settles, it falls onto the top side of the third airbag 18. As the air inside the third airbag 18 is expelled and the airbag shrinks, the first support ring 20 supports the inner circumference of the third airbag 18, thereby tilting the top side of the third airbag 18, which facilitates the sludge to slide off from the top side of the third airbag 18.

[0067] Reference Figure 6 A second support ring 21 is fixedly installed on the bottom side of the shield 8 along the edge of the mounting plate 10. The inner wall of the second support ring 21 has an annular groove 23 for the shield 13 to enter. When the shield 13 enters the annular groove 23, the second support ring 21 supports the shield 13, thereby reducing the possibility of the shield 13 bending downward due to the pressure of sewage.

[0068] The implementation principle of an MBR membrane module according to an embodiment of this application is as follows: After the air inside the aeration box 5 is discharged from the aeration head 6 and stops, sewage will flow into the aeration box 5, thereby increasing the water level inside the aeration box 5. When the water level inside the aeration box 5 rises, the drive mechanism 14 drives the baffle plate 13 to be offset from the sludge discharge port 11 through the shaft 12, thereby facilitating the discharge of sludge inside the baffle 8 from the sludge discharge port 11, and thus reducing the amount of sludge inside the baffle 8. By reducing the amount of sludge inside the baffle 8, the amount of sludge carried by the air sprayed from the aeration head 6 is reduced, thereby improving the scouring effect of the air on the membrane element 2.

[0069] Before the water level of the sewage inside the aeration box 5 is lower than the bottom of the exhaust pipe 7, the drive mechanism 14 drives the baffle plate 13 to block the sludge discharge port 11. When the air inside the aeration box 5 is ejected from the aeration head 6, the sludge discharge port 11 is blocked by the baffle plate 13, thereby reducing the occurrence of sewage entering the baffle cover 8 from the sludge discharge port 11.

[0070] Example 2

[0071] This application discloses an MBR membrane module.

[0072] Reference Figure 8 , Figure 9 The difference between this embodiment of the MBR membrane module and Embodiment 1 is that a groove 24 is formed on the top side of the mounting plate 10 between two adjacent sludge discharge ports 11, and an elastic membrane 25 is fixedly installed in the groove opening of the groove 24. An elastic sheet 26 is fixedly installed between the elastic membrane 25 and the bottom of the groove 24. A push rod 27 is fixedly installed on the bottom side of the elastic membrane 25, and the bottom end of the push rod 27 is hemispherical. A through hole 28 is formed in the bottom of the groove 24 for the push rod 27 to pass through.

[0073] The implementation principle of an MBR membrane module according to an embodiment of this application is as follows: When the baffle plate 13 is misaligned with the sludge discharge port 11, the baffle plate 13 presses against the push rod 27, and the push rod 27 lifts the elastic membrane 25, thereby facilitating the sludge on the elastic membrane 25 to slide towards the sludge discharge port 11 and be discharged. When the baffle plate 13 blocks the sludge discharge port 11, the elastic sheet 26 drives the elastic membrane 25 to return to its original position.

[0074] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An MBR membrane module, characterized in that: The device includes a membrane frame (1) and multiple membrane elements (2) fixedly installed on the membrane frame (1). An air supply assembly (4) and multiple downward-facing aeration boxes (5) are fixedly installed on the bottom side of the membrane frame (1). The air supply assembly (4) is used to blow air into each aeration box (5). An aeration head (6) is provided on the top side of each aeration box (5). An exhaust pipe (7) is fixedly connected to the aeration head (6) and is fixedly inserted through the top side of the aeration box (5). An upward-facing shield (8) is fixedly installed inside each aeration box (5). The part of the exhaust pipe (7) located inside the aeration box (5) is fitted with a mounting plate (10) on the bottom side of the shield (8). The mounting plate (10) has multiple sludge discharge ports (11). A shaft (12) is rotatably mounted on the bottom side of the mounting plate (10). Multiple shields (13) are fixedly mounted on the shaft (12). The shaft (12) rotates to drive the shields (13) to shield the sludge discharge ports (11). A drive mechanism (14) is mounted on the shaft (12). The drive mechanism (14) is used to drive the shaft (12) to rotate. The drive mechanism (14) includes a counterweight sleeve (141), a slider (142), and a lifting assembly (143). The counterweight sleeve (141) is sleeved on the shaft (12). The slider (142) is fixedly installed on the inner wall of the counterweight sleeve (141). The shaft (12) has a groove (15) for the slider (142) to slide. The groove (15) is inclined. The lifting assembly (143) is used to drive the counterweight sleeve (141) to move up and down. The lifting assembly (143) includes a vertical rod (1431), a limiting block (1432), a horizontal rod (1433), and a float (1434). One end of the horizontal rod (1433) is fixedly connected to the outer wall of the counterweight sleeve (141), and the other end of the horizontal rod (1433) is fixedly connected to the bottom end of the vertical rod (1431). The top end of the vertical rod (1431) is fixedly connected to the float (1434). The limiting block (1432) is fixedly installed on the outer wall of the shield (8), and the vertical rod (1431) slides through the limiting block (1432).

2. The MBR membrane module according to claim 1, characterized in that: The air supply assembly (4) includes an air supply pipe (41) and an air supply trough (42). The opening of the air supply trough (42) faces downward. The air supply trough (42) is fixedly installed on the bottom side of the membrane frame (1). The air supply trough (42) is located inside the aeration box (5). One end of the air supply pipe (41) is fixedly connected to one end of the air supply trough (42). Multiple exhaust holes (3) are provided on both sides of the air supply trough (42).

3. An MBR membrane module according to claim 1, characterized in that: The top side of the baffle plate (13) is fixedly embedded with a first airbag (16) along the edge, and the shaft (12) is fixedly installed with a second airbag (17). The shaft (12) has a ventilation hole (19) for connecting the first airbag (16) and the second airbag (17). The second airbag (17) is located below the counterweight sleeve (141), and the counterweight sleeve (141) is raised and lowered to squeeze the second airbag (17).

4. An MBR membrane module according to claim 1, characterized in that: A third airbag (18) is fixedly installed on the top side of the aeration box (5), and an air outlet (22) communicating with the third airbag (18) is opened on the top side of the aeration box (5).

5. An MBR membrane module according to claim 4, characterized in that: The vent (22) is located directly above the float (1434).

6. An MBR membrane module according to claim 4, characterized in that: The third airbag (18) is annular, and a first support ring (20) is fixedly installed on the top side of the aeration box (5). The outer periphery of the first support ring (20) is fixedly connected to the inner periphery of the third airbag (18).

7. An MBR membrane module according to claim 1, characterized in that: The mounting plate (10) has a groove (24) between two adjacent sludge discharge ports (11), and an elastic membrane (25) is fixedly installed in the groove (24).

8. An MBR membrane module according to claim 7, characterized in that: An elastic sheet (26) is fixedly installed between the elastic membrane (25) and the bottom of the groove (24). A push rod (27) is fixedly installed on the bottom side of the elastic membrane (25). The bottom end of the push rod (27) is hemispherical. A through hole (28) is provided at the bottom of the groove (24) for the push rod (27) to pass through.

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