MBR (Membrane Bioreactor) for removing phosphorus from wastewater

Abstract

The invention relates to the field of wastewater treatment, in particular to an MBR (Membrane Bioreactor) for removing phosphorus from wastewater. According to the existing equipment, impurities are easily attached to the surface of an MBR membrane, and the impurities on an MBR membrane module are difficult to fall off, so that the solid-liquid separation effect of the MBR membrane module on wastewater is not good enough. The invention relates to an MBR (Membrane Bioreactor) membrane reactor for removing phosphorus from wastewater. The MBR membrane reactor comprises a treatment tank, a support frame, a partition plate, a blow-down valve, an aeration frame and the like, the upper end of the treatment pond is fixedly connected with a support frame, the lower end of the treatment pond is fixedly connected with a partition plate, and a water inlet and a discharge hole are formed in the treatment pond. The waterproof motor can drive the stirring frame to rotate through the driving gear and the gear ring, the stirring frame rotates to drive wastewater to rotate, the wastewater rotates to throw impurities to the outer wall of the treatment pond, and the impurities fall down to the bottom of the treatment pond under the action of gravity, so that the concentration of the impurities in the wastewater close to the MBR membrane assembly is low, and the adhesion of the impurities to the MBR membrane assembly is reduced; further, the MBR membrane assembly has a better solid-liquid separation effect on the wastewater.

Description

Technical Field

[0001] The invention relates to the field of wastewater treatment, in particular to an MBR membrane reactor for removing phosphorus from wastewater. Background Art

[0002] The "phosphorus removal" of MBR wastewater treatment equipment is mainly done by chemical phosphorus removal first, and then solid-liquid separation through MBR membrane. The basic principle of chemical phosphorus removal is to form insoluble phosphate precipitates by adding chemical agents. When the MBR membrane separates the solid and liquid of the wastewater, the MBR membrane will intercept the insoluble precipitates, and the clean wastewater will be pumped away through the MBR membrane, thereby removing phosphorus from the sewage. The MBR membrane used for wastewater phosphorus removal is generally a hollow fiber membrane tube type.

[0003] After a period of treatment, the existing equipment will increase the impurities in the wastewater. The increase in impurities in the wastewater will lead to an increase in the concentration of suspended impurities in the wastewater. The increase in the impurity concentration in the water will lead to an increase in the viscosity of the wastewater. The increase in the viscosity of the wastewater will make it easy for impurities to adhere to the surface of the MBR membrane. In addition, most of the existing equipment flushes the MBR membrane through aeration to reduce impurities on the hollow fiber membrane tube. However, the increase in the impurity concentration in the water will lead to a decrease in the effect of aeration flushing the MBR membrane, which will make it difficult for impurities on the MBR membrane group to fall off, resulting in the MBR membrane assembly The solid-liquid separation effect of the wastewater is not good enough. Summary of the invention

[0004] In order to overcome the shortcomings of existing equipment that impurities are easily attached to the surface of MBR membranes and it is difficult to make the impurities on the MBR membrane group fall off, thereby resulting in the MBR membrane assembly having an insufficient solid-liquid separation effect on wastewater, the present invention provides an MBR membrane reactor for wastewater phosphorus removal, which can reduce the felt adhesion of impurities to the MBR membrane assembly and make the impurities on the MBR membrane assembly fall off better, thereby making the MBR membrane assembly have a better solid-liquid separation effect on wastewater.

[0005] An MBR membrane reactor for wastewater phosphorus removal comprises a treatment tank, a support frame, a partition plate, a sewage valve, an aeration frame, a filtering mechanism and a stirring mechanism, wherein the upper end of the treatment tank is fixedly connected to the support frame, the lower end of the treatment tank is fixedly connected to the partition plate, the treatment tank is provided with a water inlet and a discharge hole, the discharge hole of the treatment tank is fixedly connected to the sewage valve, the support frame is fixedly connected to the aeration frame, the support frame is provided with a filtering mechanism for filtering wastewater, and the support frame is also provided with a stirring mechanism for stirring wastewater.

[0006] Optionally, the partition plate is a funnel structure.

[0007] Optionally, the filtering mechanism includes a connecting frame, an MBR membrane assembly, a water pump bracket and a negative pressure water pump. The supporting frame is fixedly connected to the connecting frame, and a plurality of MBR membrane assemblies are fixedly connected to the connecting frame. The plurality of MBR membrane assemblies are divided into two groups. The connecting frame is fixedly connected to the water pump bracket, and a negative pressure water pump is fixedly connected to the water pump bracket. The plurality of MBR membrane assemblies, the connecting frame and the negative pressure water pump are connected.

[0008] Optionally, the stirring mechanism includes a motor bracket, a waterproof motor, a driving gear, a gear ring, a stirring frame and a cover plate, the motor bracket is fixedly connected to the support frame, the waterproof motor is fixedly connected to the motor bracket, the output shaft of the waterproof motor passes through the support frame, the output shaft of the waterproof motor is fixedly connected to the driving gear, the support frame is rotatably connected to the gear ring, the gear ring is meshed with the driving gear, the bottom of the gear ring is fixedly connected to the stirring frame, the support frame is fixedly connected to the cover plate, and the cover plate is in contact with the driving gear and the gear ring.

[0009] Optionally, a pushing mechanism is also included, which includes a limiting rod, a movable frame, a pushing frame, a swinging frame and a reset spring. Two limiting rods are fixedly connected to the connecting frame, and the two limiting rods are symmetrically arranged. A movable frame is slidably connected to each of the two limiting rods. Two pushing frames are fixedly connected between the two movable frames. Three swinging frames are rotatably connected to each pushing frame. A pushing frame and three swinging frames are provided between each group of MBR membrane components. The two limiting rods are respectively fixedly connected to the two movable frames with reset springs, and the two reset springs are respectively located in the two limiting rods.

[0010] Optionally, a circulation mechanism is also included, which includes a rotating ring and a contact frame. The rotating ring is fixedly connected to the gear ring, a groove is provided on one side of the inner side of the rotating ring, and a protrusion is provided on the other side of the inner side of the rotating ring. The contact frame is fixedly connected between the two movable frames, and one end of the contact frame is in contact with the rotating ring.

[0011] Optionally, a swing mechanism is also included, which includes a rotating shaft, a fixed frame, a rack and a rotating gear. Each pushing frame is rotatably connected to three rotating shafts, each rotating shaft is fixedly connected to each swing frame respectively, a fixed frame is fixedly connected in each limiting rod, the two fixed frames are respectively arranged in the two moving frames, each fixed frame is fixedly connected to two racks, four racks are arranged in the two pushing frames, each rotating shaft is fixedly connected to two rotating gears, and the twelve rotating gears are respectively meshed with the four racks.

[0012] Optionally, a scraper frame is also included, and three scraper frames are fixedly connected to the bottom of the stirring frame, and the three scraper frames are in contact with the partition plate.

[0013] Optionally, a guide frame is also included, and the guide frame is fixedly connected to the water inlet of the treatment pool.

[0014] The beneficial effects of the present invention are as follows: 1. The waterproof motor will drive the stirring frame to rotate through the driving gear and the gear ring, and the rotation of the stirring frame will drive the wastewater to rotate. The rotation of the wastewater will throw impurities onto the outer wall of the treatment tank. The impurities fall downward to the bottom of the treatment tank under the action of gravity, so that the impurity concentration in the wastewater close to the MBR membrane assembly is lower, reducing the attachment of impurities to the MBR membrane assembly, thereby making the MBR membrane assembly have a better solid-liquid separation effect on the wastewater.

[0015] 2. The reciprocating movement of the pushing frame and the swinging frame will contact the MBR membrane assembly and cause the MBR membrane assembly to perform two-way reciprocating bending. The reciprocating bending of the MBR membrane assembly will cause the membrane tubes of the MBR membrane assembly to rub against each other. The mutual friction of the membrane tubes of the MBR membrane assembly will cause the impurities on the MBR membrane assembly to further fall off, thereby further enhancing the solid-liquid separation effect of the MBR membrane assembly on wastewater.

[0016] 3. The swing frame will rotate forward and reverse, which will scrape off the impurities at the bending part of the MBR membrane assembly, further reducing the impurities on the MBR membrane assembly, making the MBR membrane assembly more effective in treating wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the present invention.

[0019] Figure 3 It is a partial three-dimensional structural schematic diagram of the filtering mechanism and the pushing mechanism of the present invention.

[0020] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the filtering mechanism and the pushing mechanism of the present invention.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the stirring mechanism of the present invention.

[0022] Figure 6 It is a partial three-dimensional structural schematic diagram of the pushing mechanism and the circulating mechanism of the present invention.

[0023] Figure 7 It is a partial cross-sectional three-dimensional structural schematic diagram of the pushing mechanism of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting rod, the moving frame, the pushing frame and the rotating shaft of the present invention.

[0025] Fig. 9 It is a partial cross-sectional three-dimensional structural schematic diagram of the pushing mechanism and the swinging mechanism of the present invention.

[0026] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged three-dimensional structure of A.

[0027] Fig.11 It is a three-dimensional structural schematic diagram of the fixing frame and the rack of the present invention.

[0028] Fig.12 It is a schematic diagram of the three-dimensional structure of the swing frame and the rotating shaft of the present invention.

[0029] Markings in the accompanying drawings: 1: treatment tank, 2: support frame, 21: partition plate, 3: drain valve, 4: aeration frame, 51: connecting frame, 52: MBR membrane assembly, 53: water pump bracket, 54: negative pressure water pump, 61: motor bracket, 62: waterproof motor, 63: driving gear, 64: ring gear, 65: stirring frame, 66: cover plate, 81: limiting rod, 82: moving frame, 83: pushing frame, 831: swing frame, 84: return spring, 85: rotating ring, 86: contact frame, 92: rotating shaft, 93: fixed frame, 94: rack, 95: rotating gear, 10: scraping frame, 12: guide frame. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0031] Example 1: An MBR membrane reactor for wastewater phosphorus removal, such as Figure 1-Figure 5 As shown, it includes a treatment tank 1, a support frame 2, a partition plate 21, a drain valve 3, an aeration frame 4, a filtering mechanism and a stirring mechanism. The support frame 2 is welded to the upper end of the treatment tank 1, and the partition plate 21 is welded to the lower end of the treatment tank 1. The treatment tank 1 is provided with a water inlet hole and a discharge hole, and the discharge hole on the treatment tank 1 is fixedly connected with the drain valve 3, the support frame 2 is welded with the aeration frame 4, the support frame 2 is provided with a filtering mechanism, and the filtering mechanism is used to filter wastewater. The support frame 2 is also provided with a stirring mechanism, and the stirring mechanism is used to stir the wastewater.

[0032] The partition plate 21 is a funnel structure, and the partition plate 21 with a funnel structure is more convenient for separating solid impurities.

[0033] The filtering mechanism includes a connecting frame 51, an MBR membrane assembly 52, a water pump bracket 53 and a negative pressure water pump 54. The connecting frame 51 is connected to the support frame 2 by bolts. A plurality of MBR membrane assemblies 52 are fixedly connected to the connecting frame 51. The MBR membrane assemblies 52 are used for solid-liquid separation. The plurality of MBR membrane assemblies 52 are divided into two groups. A water pump bracket 53 is welded to the connecting frame 51. A negative pressure water pump 54 is fixedly connected to the water pump bracket 53. The plurality of MBR membrane assemblies 52, the connecting frame 51 and the negative pressure water pump 54 are connected.

[0034] The stirring mechanism includes a motor bracket 61, a waterproof motor 62, a driving gear 63, a ring gear 64, a stirring frame 65 and a cover plate 66. The motor bracket 61 is welded on the support frame 2, and the waterproof motor 62 is connected to the motor bracket 61 by bolts. The output shaft of the waterproof motor 62 passes through the support frame 2, and the output shaft of the waterproof motor 62 is fixedly connected to the driving gear 63. The support frame 2 is rotatably connected with the ring gear 64, the ring gear 64 is meshed with the driving gear 63, and the bottom of the ring gear 64 is welded with a stirring frame 65. The stirring frame 65 is used to stir the wastewater and throw impurities onto the inner wall of the treatment tank 1. The support frame 2 is welded with a cover plate 66, and the cover plate 66 is in contact with the driving gear 63 and the ring gear 64.

[0035] At first, wastewater will continuously flow into the treatment tank 1 through the water inlet hole of the treatment tank 1, and high-pressure air will enter the wastewater through the aeration rack 4. The high-pressure air will be aerated in the wastewater, and the aeration will cause the membrane of the MBR membrane assembly 52 to vibrate, thereby reducing the impurities remaining on the MBR membrane assembly 52. ​​After the wastewater has submerged the MBR membrane assembly 52, the staff will start the negative pressure water pump 54 and the waterproof motor 62. The negative pressure water pump 54 will generate negative pressure to pump the wastewater away through the connecting rack 51 and the MBR membrane assembly 52. ​​At the same time, the MBR membrane assembly 52 will adsorb the solid impurities in the wastewater on the outside so that the solid impurities remain in the treatment tank 1. The rotation of the output shaft of the waterproof motor 62 will drive the driving gear 63 to rotate, and the rotation of the driving gear 63 will drive the gear ring 64 to rotate, and the rotation of the gear ring 64 will drive the stirring rack 65 to rotate, and the rotation of the stirring rack 65 will drive The wastewater is driven to rotate, and the rotation of the wastewater will throw impurities onto the inner wall of the treatment tank 1. The impurities collide with each other on the outer wall of the treatment tank 1 to form large impurities. The large impurities fall downward under the action of gravity. The large impurities fall to the bottom of the treatment tank 1 through the partition plate 21, so that the impurity concentration in the wastewater close to the MBR membrane component 52 is reduced, reducing the attachment of impurities to the MBR membrane component 52, thereby making the MBR membrane component 52 have a better solid-liquid separation effect on the wastewater. After the impurities at the bottom of the treatment tank 1 accumulate to a certain extent, the staff opens the drain valve 3, and the impurities are discharged from the treatment tank 1 through the drain valve 3. After the impurities are discharged, the staff closes the drain valve 3. After the wastewater treatment is completed, the staff turns off the negative pressure water pump 54 and the waterproof motor 62. The waterproof motor 62 is turned off to stop the driving gear 63, the ring gear 64 and the stirring frame 65 from rotating.

[0036] Embodiment 2: Based on embodiment 1, Figure 4-Figure 8As shown, a pushing mechanism is also included, which includes a limiting rod 81, a moving frame 82, a pushing frame 83, a swinging frame 831 and a reset spring 84. Two limiting rods 81 are welded on the connecting frame 51, and the two limiting rods 81 are symmetrically arranged. A moving frame 82 is slidably connected to each of the two limiting rods 81, and two pushing frames 83 are welded between the two moving frames 82. Three swinging frames 831 are rotatably connected to each of the pushing frames 83. A pushing frame 83 and three swinging frames 831 are provided between each group of MBR membrane components 52. The pushing frame 83 and the swinging frame 831 are used to bend the MBR membrane components 52. The two limiting rods 81 are respectively fixedly connected to the two moving frames 82 with reset springs 84, and the two reset springs 84 are respectively located in the two limiting rods 81.

[0037] It also includes a circulation mechanism, which includes a rotating ring 85 and a contact frame 86. The rotating ring 85 is welded on the gear ring 64. A groove is provided on one inner side of the rotating ring 85, and a protrusion is provided on the other inner side of the rotating ring 85. The contact frame 86 is fixedly connected between the two movable frames 82, and one end of the contact frame 86 is in contact with the rotating ring 85. The groove and the protrusion of the rotating ring 85 are used to squeeze the contact frame 86 to move back and forth.

[0038] At first, the return spring 84 is in a stretched state. The return spring 84 in the stretched state will make the contact frame 86 fit closely with the rotating ring 85 through the moving frame 82. The rotation of the stirring frame 65 will drive the rotating ring 85 to rotate. When the groove of the rotating ring 85 rotates to one end of the contact frame 86, the return spring 84 is reset to drive the contact frame 86 to move to one side. Then the rotating ring 85 continues to rotate so that the groove of the rotating ring 85 squeezes the contact frame 86 to reset, and the return spring 84 returns to the initial state. When the protrusion of the rotating ring 85 rotates to one end of the contact frame 86, the protrusion of the rotating ring 85 will first squeeze the contact frame 86 to move to the other side, and the return spring 84 is further stretched. Then the rotating ring 85 continues to rotate so that the protrusion of the rotating ring 85 no longer squeezes the contact frame 86. The return spring 84 is reset to the initial state and drives the contact frame 86 to reset. In this way, the rotation of the rotating ring 85 will cause the contact frame 86 to reciprocate through the protrusion and groove of the rotating ring 85, and the reciprocating movement of the contact frame 86 will drive the moving frame 82, the pushing frame 83 and the swinging frame 831 to reciprocate, and the reciprocating movement of the moving frame 82 will cause the reset spring 84 to stretch and reset reciprocatingly, and the reciprocating movement of the pushing frame 83 and the swinging frame 831 will contact the MBR membrane assembly 52 and cause the MBR membrane assembly 52 to perform two-way reciprocating bending, and the reciprocating bending of the MBR membrane assembly 52 will cause the membrane tubes of the MBR membrane assembly 52 to rub against each other, and the mutual friction of the membrane tubes of the MBR membrane assembly 52 will cause the impurities on the MBR membrane assembly 52 to further fall off, thereby further enhancing the solid-liquid separation effect of the MBR membrane assembly 52 on wastewater, and the impurities dropped from the MBR membrane assembly 52 will fall to the bottom of the treatment tank 1 through the partition plate 21.

[0039] Embodiment 3: Based on embodiment 2, Figure 8-Figure 12 As shown, it also includes a swing mechanism, which includes a rotating shaft 92, a fixed frame 93, a rack 94 and a rotating gear 95. Three rotating shafts 92 are rotatably connected to each pushing frame 83, and each rotating shaft 92 is fixedly connected to each swing frame 831 respectively. Each swing frame 831 can scrape impurities, and a fixed frame 93 is welded in each limiting rod 81. The two fixed frames 93 are respectively arranged in the two moving frames 82. Two racks 94 are welded on each fixed frame 93. Four racks 94 are arranged in the two pushing frames 83. Two rotating gears 95 are welded on each rotating shaft 92, and the twelve rotating gears 95 are respectively meshed with the four racks 94.

[0040] Initially, the bends of two adjacent MBR membrane modules 52 make it difficult for impurities to fall directly, and the impurities will fall at the bends of the two MBR membrane modules 52, thereby causing the impurities to accumulate. Figure 6 As shown, the push frame 83 and the swing frame 831 move forward to contact the front MBR membrane assembly 52 and push the front MBR membrane assembly 52 to bend forward, the push frame 83 moves forward to drive the rotating shaft 92 and the rotating gear 95 to move forward, the rotating gear 95 moves forward to make the rotating gear 95 rotate clockwise, the rotating gear 95 rotates clockwise to drive the rotating shaft 92 to rotate clockwise, the rotating shaft 92 rotates clockwise to drive the swing frame 831 to rotate clockwise, the swing frame 831 rotates clockwise to contact the rear MBR membrane assembly 52, and the swing frame 831 scrapes off the impurities at the bending of the rear MBR membrane assembly 52, and the push frame 83 and the swing frame 831 Resetting will drive the rotating shaft 92, the rotating gear 95 and the swing frame 831 to reset. The pushing frame 83 and the swing frame 831 moving backward will cause the rear MBR membrane assembly 52 to bend backward. The pushing frame 83 moving backward will drive the rotating shaft 92 and the rotating gear 95 to move backward. The rotating gear 95 moving backward will reverse the rotating shaft 92 and the swing frame 831. The reversal of the swing frame 831 will contact the front MBR membrane assembly 52. ​​The swing frame 831 will also scrape off impurities at the bending part of the front MBR membrane assembly 52, further reducing impurities on the MBR membrane assembly 52, so that the MBR membrane assembly 52 has a better wastewater treatment effect.

[0041] Embodiment 4: Based on embodiment 3, Figure 2 As shown, a scraper frame 10 is also included. Three scraper frames 10 are welded to the bottom of the stirring frame 65 . The three scraper frames 10 are in contact with the partition plate 21 . The scraper frames 10 are used to scrape impurities on the partition plate 21 .

[0042] The rotation of the stirring frame 65 drives the scraping frame 10 to rotate, and the rotation of the scraping frame 10 scrapes the partition plate 21, so that the impurities falling on the partition plate 21 can fall to the bottom of the processing tank 1 better, so that there are fewer impurities at the upper end of the processing tank 1.

[0043] Embodiment 5: Based on Embodiment 4, Figure 1-Figure 2 As shown, a guide frame 12 is also included, and the guide frame 12 is welded at the water inlet of the treatment pool 1.

[0044] Initially, wastewater will continuously flow into the treatment tank 1 through the water inlet of the treatment tank 1. The wastewater flowing into the treatment tank 1 will be guided by the guide frame 12, so that the wastewater flows along the guide frame 12 and the inner wall of the treatment tank 1, thereby preventing the wastewater from flowing near the MBR membrane assembly 52, so that there are fewer impurities in the wastewater near the MBR membrane assembly 52, thereby improving the wastewater treatment efficiency of the MBR membrane assembly 52.

[0045] It should be understood that the above description is only for exemplary purposes and is not meant to limit the present invention. Those skilled in the art will appreciate that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A MBR membrane reactor for wastewater phosphorus removal, Its characteristics are: The invention comprises a treatment pool (1), a support frame (2), a partition plate (21), a sewage valve (3), an aeration frame (4), a filtering mechanism and a stirring mechanism. The upper end of the treatment pool (1) is fixedly connected to the support frame (2), the lower end of the treatment pool (1) is fixedly connected to the partition plate (21), the treatment pool (1) is provided with a water inlet hole and a discharge hole, the discharge hole on the treatment pool (1) is fixedly connected to the sewage valve (3), the support frame (2) is fixedly connected to the aeration frame (4), the support frame (2) is provided with a filtering mechanism, the filtering mechanism is used to filter wastewater, and the support frame (2) is also provided with a stirring mechanism, the stirring mechanism is used to stir the wastewater.

2. The MBR membrane reactor for wastewater phosphorus removal according to claim 1, Its characteristics are: The partition plate (21) is a funnel structure.

3. The MBR membrane reactor for wastewater phosphorus removal according to claim 2, Its characteristics are: The filtering mechanism comprises a connecting frame (51), an MBR membrane assembly (52), a water pump bracket (53) and a negative pressure water pump (54); the supporting frame (2) is fixedly connected to the connecting frame (51); a plurality of MBR membrane assemblies (52) are fixedly connected to the connecting frame (51); the plurality of MBR membrane assemblies (52) are divided into two groups; the connecting frame (51) is fixedly connected to the water pump bracket (53); the water pump bracket (53) is fixedly connected to the negative pressure water pump (54); the plurality of MBR membrane assemblies (52), the connecting frame (51) and the negative pressure water pump (54) are connected.

4. The MBR membrane reactor for wastewater phosphorus removal according to claim 3, Its characteristics are: The stirring mechanism comprises a motor support (61), a waterproof motor (62), a driving gear (63), a gear ring (64), a stirring frame (65) and a cover plate (66); the motor support (61) is fixedly connected to the support frame (2); the waterproof motor (62) is fixedly connected to the motor support (61); the output shaft of the waterproof motor (62) passes through the support frame (2); the driving gear (63) is fixedly connected to the output shaft of the waterproof motor (62); the support frame (2) is rotatably connected to the gear ring (64); the gear ring (64) is meshed with the driving gear (63); the bottom of the gear ring (64) is fixedly connected to the stirring frame (65); the support frame (2) is fixedly connected to the cover plate (66); the cover plate (66) is in contact with the driving gear (63) and the gear ring (64).

5. The MBR membrane reactor for wastewater phosphorus removal according to claim 4, Its characteristics are: The invention also comprises a pushing mechanism, which comprises a limiting rod (81), a moving frame (82), a pushing frame (83), a swinging frame (831) and a reset spring (84). Two limiting rods (81) are fixedly connected to the connecting frame (51), and the two limiting rods (81) are symmetrically arranged. A moving frame (82) is slidably connected to each of the two limiting rods (81). Two pushing frames (83) are fixedly connected between the two moving frames (82). Three swinging frames (831) are rotatably connected to each of the pushing frames (83). A pushing frame (83) and three swinging frames (831) are arranged between each group of MBR membrane assemblies (52). A reset spring (84) is fixedly connected between the two limiting rods (81) and the two moving frames (82). The two reset springs (84) are respectively located in the two limiting rods (81).

6. The MBR membrane reactor for wastewater phosphorus removal according to claim 5, Its characteristics are: The invention also comprises a circulation mechanism, which comprises a rotating ring (85) and a contact frame (86). The rotating ring (85) is fixedly connected to the gear ring (64). A groove is formed on one side of the inner side of the rotating ring (85). A protrusion is formed on the other side of the inner side of the rotating ring (85). The contact frame (86) is fixedly connected between the two movable frames (82). One end of the contact frame (86) contacts the rotating ring (85).

7. The MBR membrane reactor for wastewater phosphorus removal according to claim 6, Its characteristics are: The invention also comprises a swing mechanism, which comprises a rotating shaft (92), a fixed frame (93), a rack (94) and a rotating gear (95). Three rotating shafts (92) are rotatably connected to each pushing frame (83), each rotating shaft (92) is respectively fixedly connected to each swinging frame (831), a fixed frame (93) is fixedly connected to each limiting rod (81), two fixed frames (93) are respectively arranged in two moving frames (82), each fixed frame (93) is fixedly connected to two racks (94), four racks (94) are arranged in two pushing frames (83), each rotating shaft (92) is fixedly connected to two rotating gears (95), and the twelve rotating gears (95) are respectively meshed with four racks (94).

8. The MBR membrane reactor for wastewater phosphorus removal according to claim 7, Its characteristics are: It also includes a scraper frame (10), and three scraper frames (10) are fixedly connected to the bottom of the stirring frame (65), and the three scraper frames (10) are in contact with the partition plate (21).

9. The MBR membrane reactor for wastewater phosphorus removal according to claim 8, Its characteristics are: It also includes a flow guide frame (12), and the flow guide frame (12) is fixedly connected to the water inlet of the treatment pool (1).

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