MBR (Membrane Bioreactor) membrane module device

Abstract

The invention relates to the field of sewage treatment equipment, in particular to an MBR (Membrane Bioreactor) membrane module, which comprises a membrane frame and a plurality of membrane elements fixedly mounted on the membrane frame, an air supply assembly and a plurality of aeration boxes with downward openings are fixedly mounted on the bottom side of the membrane frame, the air supply assembly is used for blowing air into each aeration box, aeration heads are arranged on the top sides of the aeration boxes, and the aeration heads are used for blowing air into the aeration boxes. The aeration head is fixedly connected with an exhaust pipe, the exhaust pipe fixedly penetrates through the top side of the aeration box, a shielding cover with an upward opening is fixedly mounted in the aeration box, the shielding cover sleeves the part, located in the aeration box, of the exhaust pipe, a mounting plate is embedded in the bottom side of the shielding cover, a plurality of sludge discharge ports are formed in the mounting plate, and a shaft rod is rotationally mounted on the bottom side of the mounting plate; a plurality of shielding plates are fixedly mounted on the shaft rod, the shaft rod rotates to drive the shielding plates to shield the sludge discharging opening, and a driving mechanism is mounted on the shaft rod and used for driving the shaft rod to rotate. The membrane element has the effect of improving the flushing effect of air on the membrane element.

Description

Technical Field

[0001] The present application relates to the field of sewage treatment equipment, and in particular to an MBR membrane module. Background Art

[0002] With the improvement of environmental awareness and the increasing shortage of water resources, MBR membrane modules, as a high-efficiency, energy-saving and environmentally friendly sewage treatment technology, are widely used in the treatment of industrial wastewater, urban sewage, medical wastewater and other fields.

[0003] At present, the related art discloses an MBR membrane module, including a membrane frame and a plurality of membrane elements fixedly mounted on the membrane frame, an aeration tube and a plurality of aeration boxes fixedly mounted on the bottom side of the membrane frame, and the aeration tube is located below the aeration box. A plurality of exhaust holes are provided on the top side of the aeration tube. A U-shaped tube is arranged inside the aeration box, and one end of the U-shaped tube is higher than the other end. An aeration head is arranged 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 tube is connected to an aeration pump, and the aeration pump pumps air into the aeration tube. Then the air enters the aeration box from the exhaust hole and gathers on the top side of the aeration box. As the air gathers inside the aeration box, the sewage 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, the air is discharged from the U-shaped tube by the siphon principle. The air discharged from the U-shaped tube is diffused through the aeration head, and then the air moves upward to flush the sludge contaminated on the membrane element, thereby reducing the occurrence of clogging of the membrane element.

[0004] However, sewage will enter the U-tube, and then the sludge will settle inside the U-tube. Every time the air is discharged from the U-tube, the air needs to flush out the sludge settled inside the U-tube, and the sludge enters between two adjacent membrane elements, and the amount of sludge between two adjacent membrane elements increases. As the amount of sludge between two adjacent membrane elements increases, the amount of sludge re-adhering to the membrane elements will generally increase, thereby reducing the flushing effect of air on the membrane elements. Summary of the invention

[0005] In order to improve the flushing effect of air on membrane elements, the present application provides an MBR membrane module.

[0006] The present application provides an MBR membrane module, which adopts the following technical solution: A MBR membrane module comprises a membrane frame and a plurality of membrane elements fixedly mounted on the membrane frame, an air supply assembly and a plurality of aeration boxes with openings facing downwards fixedly mounted on the bottom side of the membrane frame, the air supply assembly being used for blowing air into each of the aeration boxes, an aeration head being provided on the top side of the aeration box, the aeration head being fixedly connected with an exhaust pipe, the exhaust pipe being fixedly passed through the top side of the aeration box, a shielding cover with an opening facing upwards fixedly mounted inside the aeration box, the shielding cover being sleeved on the portion of the exhaust pipe located inside the aeration box, a mounting plate being embedded on the bottom side of the shielding cover, the mounting plate being provided with a plurality of mud discharge ports, a shaft rod being rotatably mounted on the bottom side of the mounting plate, a plurality of shielding plates being fixedly mounted on the shaft rod, the rotation of the shaft rod being used for driving the shielding plates to shield the mud discharge ports, the shaft rod being mounted with a driving mechanism, the driving mechanism being used for driving the shaft rod to rotate.

[0007] By adopting the above technical solution, after the air supply assembly is connected to the aeration pump, the aeration pump is started, and air enters each aeration box from the air supply assembly. 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 end of the exhaust pipe, the air inside the aeration box enters the aeration head from the exhaust pipe through the siphon principle. The air is then sprayed from the aeration head to the membrane element for flushing. After the air inside the aeration box is discharged, the sewage re-enters the aeration box, thereby stopping aeration. After the air is stored in the aeration box, the air is ejected together again, and the impact force of the air ejected from the aeration head is large, thereby increasing the flushing effect of the air on the membrane element.

[0008] When the water level inside the aeration box is higher than the bottom of the exhaust pipe, the driving mechanism drives the shaft to rotate, and the shaft drives the shielding plate to stagger with the mud discharge port, so as to facilitate the discharge of sludge inside the shielding cover from the mud discharge port, thereby reducing the sludge inside the shielding cover. Before the water level inside the aeration box is lower than the bottom of the exhaust pipe, the driving mechanism drives the shaft to rotate, and the shaft drives the shielding plate to block the mud discharge port, thereby facilitating the blocking of the mud discharge port. When the air inside the aeration box is discharged from the aeration head, the sludge inside the shielding cover has been discharged from the mud discharge port, and the amount of sludge inside the shielding cover is small, thereby reducing the amount of sludge carried by the air when it is sprayed from the aeration head, thereby improving the flushing effect of the air on the membrane element.

[0009] 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, and multiple exhaust holes are provided on both sides of the air supply trough.

[0010] 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 body, and then the air inside the air supply tank body is discharged from the exhaust hole and enters the aeration box, so as to facilitate the air supply to the aeration box. The exhaust hole is located on the side wall of the air supply tank body, and the sludge inside the air supply tank body will be discharged from the opening on the bottom side, so that the exhaust hole is blocked.

[0011] Optionally, the driving mechanism includes a counterweight sleeve, a slider and a lifting assembly, the counterweight sleeve is sleeved on the shaft rod, the slider is fixedly mounted on the inner wall of the counterweight sleeve, the shaft rod is provided with a sliding groove for the slider to slide, the sliding groove is inclined, and the lifting assembly is used to drive the counterweight sleeve to move up and down.

[0012] By adopting the above technical solution, the lifting assembly drives the counterweight sleeve to rise, the counterweight sleeve drives the slider to rise, the slider slides upward inside the slide slot, and the slide slot is tilted to make the shaft rod rotate in one direction. The lifting assembly drives the counterweight sleeve to descend, the counterweight sleeve drives the slider to descend, the slider slides downward inside the slide slot, and the slide slot is tilted to make the shaft rod rotate in another direction. The lifting assembly drives the counterweight sleeve to rise and fall, thereby facilitating the driving of the shaft rod to rotate.

[0013] Optionally, the lifting assembly includes a vertical rod, a limit block, a horizontal rod and a floating block, 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 floating block, the limit block is fixedly installed on the outer wall of the shielding cover, and the vertical rod slides through the limit block.

[0014] By adopting the above technical solution, the limit block limits the vertical rod to rotate with the shaft rod as the axis, thereby facilitating the limit of the counterweight sleeve rotating with the shaft rod as the axis. When the water level inside the aeration box rises, the floating block drives the counterweight sleeve to rise through the horizontal rod and the vertical rod, thereby facilitating the driving of the counterweight sleeve to rise. When the water level inside the aeration box drops, the weight of the floating block is applied to the counterweight sleeve through the horizontal rod and the vertical rod, thereby facilitating the driving of the counterweight sleeve to drop.

[0015] Optionally, a first airbag is fixedly embedded along the edge of the top side of the baffle plate, a second airbag is fixedly mounted on the shaft, a vent hole for connecting the first airbag and the second airbag is opened inside the shaft, the second airbag is located below a counterweight sleeve, and the counterweight sleeve is raised and lowered to squeeze the second airbag.

[0016] By adopting the above technical solution, when the counterweight sleeve descends, the shaft rotates to drive the shielding plate to block the mud discharge port, and the counterweight sleeve squeezes the second airbag, and the air inside the second airbag enters the first airbag, thereby expanding the first airbag. After the first airbag expands, it blocks the gap between the shielding plate and the mounting plate, thereby improving the sealing performance of the shielding plate after blocking the mud discharge port.

[0017] When the counterweight sleeve rises, the shaft drives the shielding plate to stagger with the mud discharge port, and the counterweight sleeve releases the second airbag, and the air inside the first airbag enters the second airbag, thereby shrinking the first airbag. After the first airbag shrinks, the friction resistance between the shielding plate and the mounting plate is reduced, so that it is convenient for the counterweight sleeve to drive the shaft to rotate.

[0018] Optionally, a third air bag is fixedly mounted on the top side of the aeration box, and an air outlet hole communicating with the third air bag is opened on the top side of the aeration box.

[0019] By adopting the above technical solution, the third airbag is conducive to increasing the air storage capacity inside the aeration box, thereby increasing the duration of air ejection from the aeration head, thereby improving the flushing effect of air on the membrane element. At the same time, when the air inside the aeration box is discharged from the aeration head, the sewage squeezes the third airbag, thereby accelerating the impact force of the air inside the aeration box being discharged from the aeration head, thereby improving the flushing effect of air on the membrane element.

[0020] Optionally, the air outlet is located directly above the floating block.

[0021] 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 bag is sprayed from the air outlet to the aeration box. The air sprayed from the air outlet impacts the floating block, thereby increasing the downward pressure on the counterweight sleeve, thereby reducing the upward movement of the counterweight sleeve after being disturbed by the water flow.

[0022] Optionally, the third airbag is annular, a first support ring is fixedly mounted on the top side of the aeration box, and an outer periphery of the first support ring is fixedly connected to an inner periphery of the third airbag.

[0023] By adopting the above technical solution, the sludge will accumulate on the top side of the third airbag when it settles. When the air inside the third airbag is discharged from the air outlet, the third airbag shrinks, and the inner circumference of the third airbag is higher than the outer circumference of the third airbag under the support of the first support ring, and the top side of the third airbag is inclined, so that the sludge can fall from the top side of the third airbag easily.

[0024] Optionally, a groove is provided in a portion of the mounting plate between two adjacent mud discharge ports, and an elastic membrane is fixedly mounted on the notch of the groove.

[0025] By adopting the above technical solution, as sewage enters the shielding cover, the sewage squeezes the elastic membrane, causing the elastic membrane to be concave and deformed toward the inside of the groove. When the air enters the shielding cover and is discharged from the exhaust pipe, the air flow rate above the elastic membrane is fast, causing the elastic membrane to bulge upward. The elastic membrane is repeatedly concave and convex, so that the sludge on the elastic membrane can be easily shaken off.

[0026] Optionally, an elastic sheet is fixedly installed between the elastic membrane and the bottom of the groove, 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 for the push rod to pass through is opened at the bottom of the groove.

[0027] By adopting the above technical solution, when the shielding plate is offset from the mud discharge port, the shielding plate squeezes the bottom end of the push rod, so that the push rod moves upward, and the push rod pushes the elastic membrane upward to bulge. The bulge of the elastic membrane facilitates the sludge on the elastic membrane to move to the mud discharge port and then be discharged. When the shielding plate blocks the mud discharge port, the elastic sheet drives the elastic membrane to recover.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. When air is introduced into the aeration box to gradually reduce the water level inside the aeration box, the driving mechanism drives the shaft to rotate, and the shaft drives the shielding plate to be offset from the mud discharge port first, and then the sludge inside the shielding cover is discharged from the mud discharge port, thereby reducing the amount of sludge deposited inside the shielding cover. After that, the driving mechanism drives the shaft to rotate again, allowing the shielding plate to block the mud discharge port. When the shielding plate blocks the mud discharge port and the water level inside the aeration box is lower than the bottom end of the exhaust pipe, the air inside the aeration box is discharged from the exhaust pipe into the aeration head, and the air is then sprayed from the aeration head to the membrane element. The amount of sludge inside the shielding cover is small, so that the amount of sludge carried by the air sprayed from the aeration head to the membrane element is small, thereby improving the flushing effect of air on the membrane element; 2. The third air bag increases the amount of air contained in the aeration box, thereby increasing the duration and impact force of air ejection from the aeration head, thereby improving the flushing effect of air on the membrane element. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 is an exploded view between the aeration box and the air supply mechanism of Example 1 of the present application; Figure 3 is a top view of the aeration box of Example 1 of the present application; Figure 4 yes Figure 3 Sectional view at AA; Figure 5 It is a structural schematic diagram of the aeration head, exhaust pipe, shielding cover and driving mechanism of Example 1 of the present application; Figure 6 yes Figure 4 A magnified view at point A; Figure 7 is an exploded view between the counterweight sleeve and the shaft rod of Example 1 of the present application; Figure 8 is a schematic diagram of the structure between the mounting plate and the shielding plate of Example 2 of the present application; Fig. 9 It is an exploded view between the mounting plate and the shielding plate of Example 2 of the present application.

[0030] Explanation of the accompanying drawings: 1. membrane frame; 2. membrane element; 3. exhaust hole; 4. air supply assembly; 41. air supply pipe; 42. air supply tank; 5. aeration box; 6. aeration head; 7. exhaust pipe; 8. shielding cover; 9. connecting rod; 10. mounting plate; 11. mud discharge port; 12. shaft rod; 13. shielding plate; 14. driving mechanism; 141. counterweight sleeve; 142. slider; 143. lifting assembly; 1431. vertical rod; 1432. limit block; 1433. horizontal rod; 1434. floating block; 15. slide groove; 16. first air bag; 17. second air bag; 18. third air bag; 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 DESCRIPTION

[0031] The following is combined with Figure 1-9 This application is described in further detail.

[0032] Example 1 The embodiment of the present application discloses an MBR membrane module.

[0033] Reference Figure 1 , an MBR membrane module, comprising a membrane frame 1 and a plurality of membrane elements 2 fixedly mounted on the membrane frame 1. The membrane elements 2 are arranged on the membrane frame 1 at intervals.

[0034] Reference Figure 1 , Figure 2 The bottom side of the membrane frame 1 is fixedly mounted with an air supply assembly 4, which includes an air supply pipe 41 and an air supply tank body 42. The air supply tank body 42 is fixedly mounted on the bottom side of the membrane frame 1, and the opening of the air supply tank body 42 is arranged downward, one end of the air supply pipe 41 is fixedly connected to one end of the air supply tank body 42, and the other end of the air supply pipe 41 is used to connect to the aeration pump. Multiple exhaust holes 3 are provided on both sides of the air supply tank body 42.

[0035] The aeration pump is started, and the aeration pump 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 hole 3. The air discharged from the exhaust hole 3 moves upward in the sewage, and then the air enters between two adjacent membrane elements 2, so that the air can flush the sludge contaminated on the membrane elements 2.

[0036] The exhaust holes 3 are located on both sides of the exhaust tank body, thereby reducing the occurrence of sludge settling and blocking the exhaust holes 3. At the same time, the sludge inside the air supply tank body 42 is discharged from the opening on the bottom side, thereby reducing the occurrence of sludge gathering inside the water supply tank body.

[0037] Reference Figure 1 , Figure 2 A plurality of aeration boxes 5 are fixedly mounted on the bottom side of the membrane frame 1, and an air supply tank 42 runs through each aeration box 5, and the air supply tank 42 is located inside the aeration box 5. After the air is discharged from the exhaust hole 3, the air moves upward inside the aeration box 5, and then the air gathers on the inner top wall of the aeration box 5.

[0038] Reference Figure 3 , Figure 4 The top side of the aeration box 5 is provided with an aeration head 6, and the aeration head 6 is fixedly connected with an exhaust pipe 7, and the exhaust pipe 7 is fixedly passed through the top side of the aeration box 5. A shielding cover 8 is provided inside the aeration box 5, and the shielding cover 8 is sleeved on the part of the exhaust pipe 7 located inside the aeration box 5. A plurality of connecting rods 9 are fixedly installed between the top side of the shielding cover 8 and the inner top wall of the aeration box 5, so as to facilitate the installation of the shielding cover 8 inside the aeration box 5.

[0039] After being discharged from the exhaust hole 3, the air gathers 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 end of the exhaust pipe 7, the air inside the aeration box 5 flows into the shielding cover 8, and the air inside the shielding cover 8 is discharged from the exhaust pipe 7 into the aeration head 6. Then the air inside the aeration head 6 is sprayed toward the membrane element 2.

[0040] As air is sprayed from the aeration head 6 toward the membrane element 2, the air inside the aeration box 5 decreases and the water level increases. After the water level inside the aeration box 5 is higher than the top side of the shielding cover 8, the air inside the aeration head 6 stops spraying toward the membrane element 2.

[0041] By providing the aeration box 5 , the shielding cover 8 and the 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 each air spray from the aeration head 6 , and further increasing the flushing effect of the air on the membrane element 2 .

[0042] Reference Figure 5 , Figure 6 , Figure 7, a mounting plate 10 is fixedly embedded on the bottom side of the shielding cover 8, and the mounting plate 10 is circular. The mounting plate 10 is provided with a plurality of mud discharge ports 11, and the plurality of mud discharge ports 11 are arranged around the center of the mounting plate 10. A shaft 12 is rotatably inserted on the bottom side of the mounting plate 10, and a plurality of shielding plates 13 are fixedly installed on the shaft of the shaft 12. By rotating the shaft 12, the shaft 12 drives the shielding plates 13 to be misaligned with the mud discharge port 11, thereby facilitating the discharge of sludge inside the shielding cover 8 from the mud discharge port 11. By rotating the shaft 12, the shaft 12 drives the shielding plates 13 to block the mud discharge port 11, thereby facilitating the closing of the mud discharge port 11. After the mud discharge port 11 is closed, the shielding cover 8 and the exhaust pipe 7 form a U-shaped tube, thereby facilitating the discharge of air inside the aeration box 5 through the siphon principle.

[0043] Reference Figure 5 , Figure 6 The shaft 12 is provided with a driving mechanism 14, which is used to drive the shaft 12 to rotate. The driving 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 of the shaft 12 is provided with a slide groove 15 for the slider 142 to slide, and the slide groove 15 is inclined. The lifting assembly 143 is used to drive the counterweight sleeve 141 to move up and down.

[0044] Reference Figure 5 , Figure 6 The lifting assembly 143 includes a vertical rod 1431, a stopper 1432, a horizontal rod 1433 and a floating block 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 of the vertical rod 1431 is fixedly connected to the floating block 1434, the stopper 1432 is fixedly installed on the outer wall of the shielding cover 8, and the vertical rod 1431 slides through the stopper 1432.

[0045] After the air inside the aeration box 5 stops being discharged from the aeration head 6, the sewage re-enters the aeration box 5, and the water level inside the aeration box 5 is high. When the water level inside the aeration box 5 is high, the float 1434 drives the weight sleeve 141 to move upward through the horizontal rod 1433 and the vertical rod 1431, and the slider 142 slides to the top of the slide 15. When the slider 142 slides to the top of the slide 15, the slider 142 and the inner wall of the slide 15 squeeze each other, so that the shaft 12 rotates in one direction, so that the shielding plate 13 is staggered with the mud discharge port 11, thereby facilitating the discharge of the mud inside the shielding cover 8 from the mud discharge port 11.

[0046] As the air continues to gather inside the aeration box 5, the water level inside the aeration box 5 continues to decrease. Before the water level inside the aeration box 5 is higher than the top of the exhaust pipe 7, the weight of the floating block 1434 is applied to the counterweight sleeve 141 through the vertical rod 1431 and the horizontal rod 1433, so that the counterweight sleeve 141 drives the slider 142 to move downward along the slide 15. When the slider 142 slides to the bottom of the slide 15, the slider 142 and the inner wall of the slide 15 press each other, so that the shaft 12 rotates in the other direction, allowing the shielding plate 13 to block the mud outlet 11. When the water level of the sewage inside the aeration box 5 is lower than 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, and by blocking the mud outlet 11, the situation that the sewage enters the shielding cover 8 from the mud outlet 11 and blocks the bottom of the exhaust pipe 7 is reduced, thereby facilitating the discharge of air inside the aeration box 5 through the siphon principle.

[0047] In another embodiment, the driving mechanism 14 is a motor, which drives the shaft 12 to rotate. Compared with the driving mechanism 14 of another embodiment, the driving mechanism 14 of the present application utilizes buoyancy to drive the shaft 12 to rotate, thereby achieving energy saving.

[0048] Reference Figure 6 , Figure 7 The top side of the shielding plate 13 is fixedly embedded with a first airbag 16 along the edge, and the part of the shaft rod 12 below the sliding sleeve is fixedly installed with a second airbag 17. The shaft rod 12 is provided with a vent hole 19 for connecting the first airbag 16 and the second airbag 17.

[0049] When the counterweight sleeve 141 descends, the second airbag 17 is squeezed, and the shielding plate 13 blocks the mud discharge port 11. After the second airbag 17 is squeezed, the air inside the second airbag 17 enters the first airbag 16 from the vent 19, thereby expanding the first airbag 16. After the first airbag 16 expands, it blocks the gap between the shielding plate 13 and the mounting plate 10, thereby improving the sealing performance.

[0050] When the counterweight sleeve 141 rises, the second airbag 17 is released, and the shielding plate 13 is misaligned with the mud discharge port 11, and the air inside the first airbag 16 enters the second airbag 17 from the vent hole 19, thereby shrinking the first airbag 16. After the first airbag 16 shrinks, the friction resistance between the shielding plate 13 and the mounting plate 10 is small, thereby facilitating the rotation of the drive shaft 12.

[0051] Reference Figure 4 The top side of the aeration box 5 is fixedly mounted with a third air bag 18, and the third air bag 18 is annular. The top side of the aeration box 5 is provided with an air outlet 22 connected to the third air bag 18. The air outlet 22 is located directly above the floating block 1434. The top side of the aeration box 5 is fixedly mounted with a first support ring 20, and the outer periphery of the first support ring 20 is fixedly connected to the inner periphery of the third air bag 18.

[0052] When the air supply assembly 4 delivers air into the aeration box 5, the air enters the third airbag 18 from the air outlet 22, and the third airbag 18 expands, which helps to 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, the air inside the third airbag 18 enters the aeration box 5 from the air outlet 22, and then the air is ejected from the aeration head 6. The third airbag 18 is squeezed by the sewage, thereby accelerating the speed at which the air inside the aeration box 5 is discharged from the aeration head 6, thereby 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 flushing effect of the air on the membrane element 2 is improved.

[0053] When the air inside the third airbag 18 is exhausted and reduced, the sewage will fill the reduced space of the third airbag 18, thereby disturbing the sewage. By disturbing the sewage, the air sprayed by the aeration head 6 is easily diffused, thereby improving the uniformity of air flushing the membrane element 2.

[0054] The sludge in the sewage settles and falls on the top side of the third airbag 18. When the air inside the third airbag 18 is exhausted and reduced, the first support ring 20 supports the inner circumference of the third airbag 18, so that the top side of the third airbag 18 is inclined, thereby facilitating the sludge to slide off the top side of the third airbag 18.

[0055] Reference Figure 6 A second support ring 21 is fixedly mounted on the bottom side of the shielding cover 8 along the edge of the mounting plate 10, and an annular groove 23 is formed on the inner wall of the second support ring 21 for the shielding plate 13 to enter. The shielding plate 13 enters the annular groove 23, and the second support ring 21 supports the shielding plate 13, thereby reducing the shielding plate 13 from being squeezed by sewage and bending downward.

[0056] The implementation principle of an MBR membrane module in the embodiment of the present 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 driving mechanism 14 drives the shielding plate 13 to be staggered with the mud discharge port 11 through the shaft 12, thereby facilitating the discharge of sludge inside the shielding cover 8 from the mud discharge port 11, thereby reducing the amount of sludge inside the shielding cover 8. By reducing the amount of sludge inside the shielding cover 8, the amount of sludge carried by the air ejected from the aeration head 6 is reduced, thereby improving the flushing effect of air on the membrane element 2.

[0057] Before the water level of the sewage in the aeration box 5 is lower than the bottom end of the exhaust pipe 7, the driving mechanism 14 drives the shielding plate 13 to shield the mud discharge port 11. When the air in the aeration box 5 is ejected from the aeration head 6, the mud discharge port 11 is shielded by the shielding plate 13, thereby reducing the occurrence of sewage entering the shielding cover 8 from the mud discharge port 11.

[0058] Example 2 The embodiment of the present application discloses an MBR membrane module.

[0059] Reference Figure 8 , Fig. 9 The difference between the MBR membrane module of the embodiment of the present application and the embodiment 1 is that a groove 24 is provided at the top side of the mounting plate 10 between two adjacent mud discharge ports 11, and an elastic membrane 25 is fixedly installed at the groove of the groove 24. An elastic sheet 26 is fixedly installed between the elastic membrane 25 and the groove bottom of the groove 24. A push rod 27 is fixedly installed at the bottom side of the elastic membrane 25, and the bottom end of the push rod 27 is hemispherical, and a through hole 28 for the push rod 27 to pass through is provided at the groove bottom of the groove 24.

[0060] The implementation principle of an MBR membrane module in the embodiment of the present application is as follows: when the shielding plate 13 is offset from the mud outlet 11, the shielding plate 13 squeezes 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 toward the mud outlet 11 and then be discharged. When the shielding plate 13 blocks the mud outlet 11, the elastic sheet 26 drives the elastic membrane 25 to recover.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An MBR membrane module, characterized in that: The invention comprises a membrane frame (1) and a plurality of membrane elements (2) fixedly mounted on the membrane frame (1); an air supply assembly (4) and a plurality of aeration boxes (5) with openings facing downwards are fixedly mounted on the bottom side of the membrane frame (1); the air supply assembly (4) is used to blow air into each of the aeration boxes (5); an aeration head (6) is arranged on the top side of the aeration box (5); the aeration head (6) is fixedly connected to an exhaust pipe (7); the exhaust pipe (7) is fixedly passed through the top side of the aeration box (5); a shielding cover (8) with an opening facing upwards is fixedly mounted inside the aeration box (5); the shielding cover (8) is fixedly mounted on the top side of the aeration box (5); ) is sleeved on the exhaust pipe (7) located inside the aeration box (5), the bottom side of the shielding cover (8) is embedded with a mounting plate (10), the mounting plate (10) is provided with a plurality of mud discharge ports (11), a shaft (12) is rotatably mounted on the bottom side of the mounting plate (10), a plurality of shielding plates (13) are fixedly mounted on the shaft (12), the shaft (12) is used to rotate to drive the shielding plates (13) to shield the mud discharge ports (11), the shaft (12) is installed with a driving mechanism (14), and the driving mechanism (14) is used to drive the shaft (12) to rotate.

2. The MBR membrane module according to claim 1, characterized in that: The air supply assembly (4) comprises 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), and a plurality of exhaust holes (3) are provided on both sides of the air supply trough (42).

3. The MBR membrane module according to claim 1, characterized in that: The driving mechanism (14) comprises 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 mounted on the inner wall of the counterweight sleeve (141); the shaft (12) is provided with a slide groove (15) for the slider (142) to slide; the slide groove (15) is inclined; and the lifting assembly (143) is used to drive the counterweight sleeve (141) to move up and down.

4. The MBR membrane module according to claim 3, characterized in that: The lifting assembly (143) comprises a vertical rod (1431), a limit block (1432), a horizontal rod (1433) and a floating block (1434); one end of the horizontal rod (1433) is fixedly connected to the outer wall of the counterweight sleeve (141); 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 floating block (1434); the limit block (1432) is fixedly installed on the outer wall of the shielding cover (8); and the vertical rod (1431) slides through the limit block (1432).

5. The MBR membrane module according to claim 3, characterized in that: A first airbag (16) is fixedly embedded along the edge of the top side of the shielding plate (13); a second airbag (17) is fixedly installed on the shaft rod (12); a vent hole (19) for connecting the first airbag (16) and the second airbag (17) is provided inside the shaft rod (12); 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).

6. The MBR membrane module according to claim 3, characterized in that: A third air bag (18) is fixedly mounted on the top side of the aeration box (5), and an air outlet hole (22) communicating with the third air bag (18) is opened on the top side of the aeration box (5).

7. The MBR membrane module according to claim 6, characterized in that: The air outlet (22) is located directly above the floating block (1434).

8. The MBR membrane module according to claim 6, characterized in that: The third airbag (18) is annular, and a first support ring (20) is fixedly mounted 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).

9. The MBR membrane module according to claim 1, characterized in that: A groove (24) is provided in the portion of the mounting plate (10) located between two adjacent mud discharge ports (11), and an elastic membrane (25) is fixedly mounted on the notch of the groove (24).

10. The MBR membrane module according to claim 9, 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, and a through hole (28) for the push rod (27) to pass through is opened at the bottom of the groove (24).

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