Sewage treatment equipment for microbial filtering membrane

Abstract

The invention relates to the technical field of sewage treatment equipment, in particular to microbial filter membrane sewage treatment equipment which comprises a sewage pool, a membrane plate, a collecting pipe and a water collecting pipe. The membrane plates are installed in the sewage pool at equal intervals, water collecting pipes are fixedly installed on the membrane plates, the multiple membrane plates are communicated and connected with a collecting pipe through the water collecting pipes, and the collecting pipe is externally connected with water pumping equipment; the device further comprises a convenient oxygen supply mechanism, and the convenient oxygen supply mechanism improves the oxygen supply efficiency by adjusting the gap between the diaphragm plates. Through the arrangement of the convenient oxygen supply mechanism, the installation mode of the membrane plates in the membrane frame is changed, when aeration oxygen supply operation is carried out, the positions of the membrane plates are switched through rotation of the rotating rings, so that narrow gaps between the membrane plates are enlarged, and then gas-liquid flow formed by aeration is convenient to wash sludge in the gaps; the sludge and oxygen are promoted to be dispersed in the sewage.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment equipment, in particular to a treatment device for microbial filtration membrane sewage. Background Art

[0002] MBR, or membrane bioreactor, is a highly efficient sewage treatment process that combines membrane separation technology with biological treatment technology. Its core structure includes submerged membrane structure, aeration system and biological reaction zone. The membrane structure usually adopts hollow fiber membrane or flat membrane structure with a pore size range of 0.1-0.4 microns, which can effectively intercept activated sludge and macromolecular organic matter.

[0003] When the MBR membrane group is in use, it needs to be coordinated with activated sludge to enhance the purification effect of sewage. Since the membrane plates in the MBR membrane group are arranged compactly, during long-term operation, the sludge follows the water flow into the gaps of the MBR membrane group, which not only affects the flow of sewage into the gaps between the membrane plates, but also because the gaps in the MBR membrane group are small, the flow efficiency of the sludge in the gaps of the MBR is reduced, making it inconvenient for this part of the sludge to participate in sewage purification. At the same time, if the residence time is too long, it is easy to cause hypoxia of the microorganisms in the sludge, which in turn causes the inactivation of the activated sludge.

[0004] In order to improve the above situation, the related technology discloses an energy-saving and non-clogging trough aeration MBR membrane module, with the announcement number CN118307131B. In this scheme, a membrane mechanism and an aeration mechanism are set up, and the bubbles generated by aeration are used to flush the sludge in the gap of the MBR membrane group. The flushing not only promotes the sludge to participate in sewage purification, but also provides oxygen for the sludge.

[0005] Another example is a MBR membrane aerator, an MBR membrane aeration device and an MBR membrane sewage treatment equipment disclosed in a related patent, with the announcement number CN110563131B. This patent also uses the bubbles generated by the aeration equipment in conjunction with the airflow guiding equipment to flush the gaps between the membrane plates, thereby flushing the MBR membrane group sludge and supplementing oxygen.

[0006] However, in actual application, it was found that although the addition of aeration equipment can enhance the sludge discharge efficiency in the MBR membrane group, due to the small gap between the MBR membrane group, when the liquid flow velocity formed by the mixture of aeration bubbles and water is slow, the sludge flushing efficiency is poor. When the mixed liquid flow velocity is fast and the impact force is strong, it is easy to cause damage to the membrane plate, and the MBR membrane plate is difficult to disassemble. Therefore, the application effect of the MBR membrane group in the treatment of sewage with a high solid content is not ideal. Summary of the invention

[0007] The object of the present invention is to make up for the deficiencies of the prior art and propose a treatment device for sewage with a microbial filtration membrane.

[0008] To solve the above technical problems, the present invention provides the following technical solution: A treatment device for sewage with a microbial filtration membrane, comprising a sewage tank, a membrane plate, a confluence pipe and a water collecting pipe; The membrane plates are installed in the sewage tank at equal intervals, and water collecting pipes are fixedly installed on the membrane plates. A plurality of the membrane plates are conductively connected to the confluence pipe through the water collecting pipes, and the confluence pipe is externally connected to a pumping device; It further includes a convenient oxygen supply mechanism, which improves the oxygen supply efficiency by adjusting the gap between the membrane plates. The convenient oxygen supply mechanism includes a membrane frame, a rotating ring, a connecting rod and an aeration pipe group; The membrane frame is a frame - type structure body, and the overall shape of the membrane frame is designed in a U - shape. The confluence pipe is fixedly installed on one side of the membrane frame, and the membrane plates are installed in the membrane frame at equal intervals; The rotating rings are rotatably installed on the confluence pipe in a uniformly distributed manner. Connecting rods are fixedly installed on the membrane plates, and the connecting rods are fixedly connected to the rotating rings; One end of the water collecting pipe far from the membrane plate penetrates and is fixedly installed on the rotating ring, and docking holes are formed on the confluence pipe; The aeration pipe group is installed below the membrane plates, and the aeration pipe group is externally connected to an aeration device; It further includes a step - by - step lifting and rotating mechanism, which cooperates with the convenient oxygen supply mechanism to gradually lift the membrane plates, thereby gradually expanding the gap inside the membrane frame.

[0009] Preferably, in the initial state, the water collecting pipe is aligned and conductively connected with the docking hole. An expansion slot is formed on the rotating ring, an elastic sealing ring is installed in the expansion slot, and the water collecting pipe extends to the inner side of the elastic sealing ring.

[0010] Preferably, the step - by - step lifting and rotating mechanism includes a mounting seat, a driving motor, a driving gear, a transmission rod and a guiding lead screw; The mounting seat is installed on the membrane frame, and the driving motor is fixedly installed on the mounting seat; The mounting seat rotatably installs a transmission rod and a guiding lead screw arranged in parallel. The output end of the driving motor is fixedly connected to the transmission rod, and the transmission rod is belt - driven to the guiding lead screw; A sliding seat is commonly installed on the transmission rod and the guiding lead screw. The sliding seat is slidably connected to the transmission rod and is in screw - drive connection with the guiding lead screw; The driving gear is rotatably installed on the sliding seat. The transmission rod is connected to the driving gear through a transmission member. The rotating ring is designed in the shape of an incomplete gear, and the driving gear is meshed with the rotating ring.

[0011] Preferably, the number of the sliding seats is two, the driving gears on the two sliding seats rotate in opposite directions, and the driving gear at the front end of the moving direction pushes the rotating ring to rotate towards the separation box.

[0012] Preferably, an adjusting rod is fixedly installed between the two sliding seats, and the adjusting rod is an adjustable telescopic rod.

[0013] Preferably, a separation box is detachably installed on one side of the sliding seat, and the top of the separation box is designed with an opening.

[0014] Preferably, a lifting groove is formed in the membrane frame, a lifting rod is slidably installed in the lifting groove, the mounting seat is fixedly installed at the top of the lifting rod, when the lifting rod is located at the bottom end of the lifting groove, the driving gear is meshed with the rotating ring, and the drainage buoyancy of the separation box is greater than the total gravity of the step-by-step lifting and rotating mechanism and the separation box.

[0015] Preferably, a support plate is fixedly installed between two adjacent sliding seats, the support plate is composed of a corrugated spring metal sheet, and when the membrane plate rotates completely, the corresponding connecting rod is located on the moving path of the support plate.

[0016] Preferably, brush pieces are fixedly installed on both sides of the membrane plate, and when two adjacent membrane plates rotate relatively, the brush pieces are in frictional contact with the membrane plate.

[0017] Preferably, the brush pieces are all designed in an L shape, the brush pieces are arranged along the edge of the membrane plate, and the brush pieces on the side where the membrane plates are close to each other are arranged in a staggered manner.

[0018] Compared with the prior art, the present invention has the following beneficial effects: First, by setting up a convenient oxygen supply mechanism and changing the installation method of the membrane plate in the membrane frame, when implementing the aeration oxygen supply operation, by using the rotation of the rotating ring to switch the position of the membrane plate, the narrow gap between the membrane plates is enlarged, so as to facilitate the scouring of the sludge in the gap by the gas-liquid flow formed by aeration, and promote the dispersion of the sludge in the sewage. Moreover, since the membrane plate rotates and then resets again, and the number of membrane plates in the rotating state at the same time is limited, the continuous operation of the MBR membrane group is less affected.

[0019] Second, by controlling the rotation speed of the driving motor and adjusting the sliding speed of the sliding seat and the rotation speed of the driving gear, the interval time between the lifting and resetting of the membrane plate can be controlled, so it is convenient for the staff to select a suitable aeration oxygen supply time.

[0020] III. The present invention exerts a supporting effect on the membrane plate through the support plate. When the support plate moves with the sliding seat, it causes the rotated membrane plate to generate a small-amplitude rotation loop. As the membrane plate moves up and down, the relative movement effect between adjacent membrane plates is enhanced. In cooperation with the brush pieces, the sludge on the surface of the membrane plate is pushed, and with the action of the water flow, the sludge is dispersed in the sewage. At the same time, the up-and-down undulation of the membrane plate also has a pushing effect on the sewage, enhancing the sewage flow effect, and further enhancing the dispersion effect of the sludge in the sewage.

[0021] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the installation schematic diagram of the present invention in the sewage tank; Figure 2 is the three-dimensional view of the present invention; Figure 3 is the three-dimensional view of the present invention in a state of being gradually lifted and rotated; Figure 4 is the assembly schematic diagram of the membrane frame and the confluence pipe; Figure 5 is the assembly schematic diagram of the membrane plate, the rotating ring, and the connecting rod; Figure 6 is the cross-sectional view of the rotating ring; Figure 7 is the assembly schematic diagram of the separation box and the gradually lifting and rotating mechanism; Figure 8 is the partial structure three-dimensional view of the gradually lifting and rotating mechanism; In the figure: 1. Membrane plate; 11. Water collecting pipe; 12. Confluence pipe; 2. Membrane frame; 21. Rotating ring; 22. Connecting rod; 23. Separation box; 24. Telescopic groove; 25. Elastic sealing ring; 26. Docking hole; 27. Aeration pipe group; 3. Installation seat; 31. Driving motor; 32. Transmission rod; 33. Guide screw; 35. Sliding seat; 36. Driving gear; 37. Adjusting rod; 4. Lifting groove; 41. Lifting rod; 42. Support plate; 43. Brush piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer toFigures 1-8 As shown in the figure, the present invention provides the following implementation schemes: a treatment device for microbial filtration membrane sewage, including a sewage tank, a membrane plate 1, a confluence pipe 12 and a water collecting pipe 11; The membrane plates 1 are installed in the sewage tank at equal intervals. In the present invention, the membrane plate 1 is composed of a membrane sheet and a plate frame. Among them, the membrane sheet is preferably a flat membrane, a hollow fiber membrane or a tubular membrane. In this embodiment, the membrane sheet is a flat membrane. The water collecting pipes 11 are fixedly installed on the membrane plates 1. The water collecting pipes 11 are fixedly installed on the plate frame and extend into the membrane sheet to collect the water filtered by the membrane plate 1. Here is the operation principle of the MBR membrane group, which will not be elaborated too much here. A plurality of the membrane plates 1 are conductively connected to the confluence pipe 12 through the water collecting pipes 11, and the confluence pipe 12 is externally connected to a pumping device; It further includes a convenient oxygen supply mechanism. The convenient oxygen supply mechanism improves the oxygen supply efficiency by adjusting the gap between the membrane plates 1. The convenient oxygen supply mechanism includes a membrane frame 2, a rotating ring 21, a connecting rod 22 and an aeration pipe group 27; The membrane frame 2 is a frame - type structure body. The whole membrane frame 2 is designed in a U - shape. The confluence pipe 12 is fixedly installed on one side of the membrane frame 2. The membrane plates 1 are installed in the membrane frame 2 at equal intervals. The presence of the membrane frame 2 is used to provide installation positions for the confluence pipe 12 and the membrane plates 1. At the same time, the membrane frame 2 is also used to assist in hoisting and handling; The confluence pipe 12 is rotatably installed with evenly distributed rotating rings 21. The connecting rods 22 are fixedly installed on the membrane plates 1. The connecting rods 22 are fixedly connected to the rotating rings 21. Since the confluence pipe 12 is located on one side of the membrane frame 2, when the rotating ring 21 rotates, it can drive the membrane plate 1 to rotate around the confluence pipe 12 through the transmission of the connecting rod 22, and then the membrane plate 1 disengages from the dense membrane plates 1 in the membrane frame 2 from the top opening. And as the rotation continues, the rotating membrane plate 1 finally moves to the side of the confluence pipe 12 away from the membrane frame 2; One end of the water collecting pipe 11 away from the membrane plate 1 penetrates and is fixedly installed on the rotating ring 21. The confluence pipe 12 is provided with a docking hole 26. In the initial state, the water collecting pipe 11 is aligned and conductively connected to the docking hole 26. Due to the fixed position of the docking hole 26, when the rotating ring 21 rotates on the confluence pipe 12, the water collecting pipe 11 that is conductively connected to the docking hole 26 in the initial state will gradually move away from the docking hole 26, and then the water collecting pipe 11 after rotation is disconnected from the confluence pipe 12. At this time, the membrane plate 1 and the water collecting pipe 11 change from a negative pressure state to an atmospheric pressure state, avoiding the continuous attachment of sludge on the membrane plate 1, and cooperating with the gas - water mixed fluid formed by aeration to accelerate the diffusion of sludge into the sewage, so that the oxygen formed by aeration can more conveniently enter the interior of the membrane frame 2; The aeration pipe group 27 is installed below the membrane plate 1. The aeration pipe group 27 is externally connected to an aeration device. The aeration pipe group 27 conveys compressed air to the lower part of the dense membrane plate 1. By using the rising of bubbles and cooperating with the rotation of the membrane plate 1, it can not only prompt the sludge to flow and disperse along with the sewage, but also provide oxygen for the sludge, thereby enhancing the continuous sewage purification effect. It further includes a step-by-step lifting and rotating mechanism. The step-by-step lifting and rotating mechanism cooperates with the convenient oxygen supply mechanism to lift the membrane plate 1 step by step, thereby gradually expanding the gap inside the membrane frame 2. A telescopic groove 24 is formed on the rotating ring 21. An elastic sealing ring 25 is installed in the telescopic groove 24. The water collecting pipe 11 extends to the inner side of the elastic sealing ring 25.

[0025] During the long-term use of the MBR membrane group, the MBR membrane group is always immersed in the sewage. The continuous flow of the sewage will cause the sludge to be blocked in the gap between the membrane frame 2 and the membrane plate 1, which is not conducive to the movement of the bubbles formed by aeration into the interior of the membrane frame 2. In order to redisperse the sludge in the sewage and at the same time provide oxygen for the sludge, the present invention adopts a convenient oxygen supply mechanism, which can not only provide oxygen for the sludge, but also use the flushing to prompt the sludge to disperse in the sewage.

[0026] Specifically, in order to enhance the convenience of bubble diffusion and flushing, in the aeration and oxygen supply process, the MBR membrane group is always in a working state. The staff first controls the rotation of the rotating ring 21 through the step-by-step lifting and rotating mechanism. The rotating ring 21, the connecting rod 22, and the membrane plate 1 are an integral whole. As the rotation continues, the rotated membrane plate 1 gradually separates from the densely arranged membrane plates 1 inside the membrane frame 2. At this time, large gaps are formed between the densely arranged membrane plates 1. The aeration pipe group 27 continuously sprays compressed air into the sewage. The sewage and the bubbles form an upward liquid flow, which entangles and flushes the sludge in the gaps, prompting the sludge to redisperse in the sewage. At the same time, the oxygen in the bubbles dissolves in the sewage to supplement oxygen for the microorganisms. As the rotating ring 21 rotates, under the action of the elastic sealing ring 25 and the docking hole 26, the rotated membrane plate 1 is separated from the influence of the confluence pipe 12. Under the influence of the liquid flow, the sludge on the membrane plate 1 is also entrained and dispersed by the sewage. The confluence pipe 12 is still under the action of an external pumping device, continuously transmitting negative pressure to the water collecting pipe 11 and the membrane plate 1 that are communicated with the docking hole 26, so that the sewage treatment can continue uninterruptedly. When the gap has experienced a period of air-liquid flow flushing, the rotating ring 21 is rotated in the reverse direction again through the step-by-step lifting and rotating mechanism, and the membrane plate 1 can be reset. During the reset process of the membrane plate 1, the water collecting pipe 11 is communicated with the docking hole 26 again, so that the corresponding membrane plate 1 is connected to the MBR membrane group again.

[0027] It should be noted that by lifting and rotating the densely arranged membrane plates 1 in batches, the intervals between the densely arranged membrane plates 1 are gradually enlarged one by one, which facilitates the layer-by-layer wrapping and dispersion of the sludge. At the same time, the sewage treatment continues without interruption, and the impact on the sewage treatment efficiency can also be reduced.

[0028] In the present invention, by providing a convenient oxygen supply mechanism, by changing the installation method of the membrane plate 1 in the membrane frame 2, during the implementation of the aeration oxygen supply operation, using the rotation of the rotating ring 21 to switch the position of the membrane plate 1, the narrow gap between the membrane plates 1 is enlarged, so as to facilitate the scouring of the sludge in the gap by the gas-liquid flow formed by aeration, promoting the dispersion of the sludge in the sewage. Moreover, since the membrane plate 1 rotates and then resets again, and the number of membrane plates 1 in the rotating state at the same time is limited, the impact on the continuous operation of the MBR membrane group is relatively small.

[0029] As a preferred embodiment of the present invention, the step-by-step lifting and rotating mechanism includes a mounting seat 3, a driving motor 31, a driving gear 36, a transmission rod 32 and a guiding lead screw 33; The mounting seat 3 is installed on the membrane frame 2, and the driving motor 31 is fixedly installed on the mounting seat 3. The driving motor 31 is selected as a waterproof motor; The transmission rod 32 and the guiding lead screw 33 are rotatably installed on the mounting seat 3 in parallel. The output end of the driving motor 31 is fixedly connected to the transmission rod 32. The transmission rod 32 is belt-drivenly connected to the guiding lead screw 33. After the driving motor 31 is started, the transmission rod 32 is directly controlled to rotate, and indirectly drives the guiding lead screw 33 to rotate through the belt; The transmission rod 32 and the guiding lead screw 33 are jointly provided with a sliding seat 35. The sliding seat 35 is slidably connected to the transmission rod 32 and is in screw drive connection with the guiding lead screw 33. When the guiding lead screw 33 rotates, through the screw drive, the sliding seat 35 makes a linear motion along the axial directions of the transmission rod 32 and the guiding lead screw 33, and the direction of the linear motion is jointly determined by the rotation direction of the driving motor 31 and the thread direction of the guiding lead screw 33; A driving gear 36 is rotatably mounted on the slide 35, and both ends of the driving gear 36 are provided with inclined surfaces so that the driving gear 36 can mesh with the rotating ring 21 in sequence when making a linear motion along the axial direction of the transmission rod 32. The transmission rod 32 is connected to the driving gear 36 through a transmission member. In the present invention, the transmission members on the two slides 35 are not the same. For example, in the present embodiment, the transmission member on one of the slides 35 is a gear, which meshes with the driving gear 36. The gear is sleeved on the transmission rod 32 and is relatively fixed to the transmission rod 32 in the circumferential direction and relatively slides in the axial direction. The transmission member on the other slide 35 is a pulley, which is connected to the driving rod 32. A belt is sleeved on the moving gear 36 to realize the belt transmission of the pulley and the driving gear 36. The pulley is sleeved on the transmission rod 32 and is relatively fixed to the transmission rod 32 in the circumferential direction and relatively sliding in the axial direction. Therefore, when the transmission rod 32 rotates, the driving gears 36 on the two slides 35 will rotate in opposite directions. The swivel 21 is an incomplete gear-shaped design. The driving gear 36 is meshed and connected with the swivel 21. The driving gear 36 installed on the slide 35 is meshed with the swivel 21. Therefore, when the driving gear 36 rotates, it will synchronously drive the swivel 21 to rotate, thereby causing the diaphragm 1 corresponding to the swivel 21 to rotate.

[0030] There are two slides 35, and the driving gears 36 on the two slides 35 rotate in opposite directions. The driving gear 36 located at the front end of the movement direction pushes the rotating ring 21 to rotate in the direction away from the membrane frame 2. The front and rear driving gears 36 rotate in different directions. The driving gear 36 located at the front end pushes the corresponding rotating ring 21, connecting rod 22, and membrane plate 1 to separate from the inner cavity of the membrane frame 2, while the driving gear 36 located at the rear end pushes the corresponding rotating ring 21, connecting rod 22, and membrane plate 1 to rotate into the membrane frame 2.

[0031] In order to further enhance the convenience of lifting, rotating and resetting the diaphragm plate 1, a step-by-step lifting and rotating mechanism is provided in the present invention. The staff controls the start of the driving motor 31 through a pre-set controller. The start of the driving motor 31 causes the transmission rod 32 and the guide screw 33 to rotate. When the guide screw 33 rotates, the slide 35 is caused to make a linear motion in the axial direction of the guide screw 33, and the rotation of the transmission rod 32 causes the front and rear driving gears 36 to rotate. As the rotation continues, multiple diaphragm plates 1 located on the movement path of the front and rear driving gears 36 are rotated from the membrane frame 2 to the outside of the membrane frame 2 in turn, and then rotated from the outside of the membrane frame 2 to the inside of the membrane frame 2 again, so that the diaphragm plates 1 arranged in the membrane frame 2 can be lifted in sequence, thereby realizing the step-by-step entrainment and dispersion of the sludge in the gaps of the diaphragm plates 1.

[0032] It should be noted that by controlling the rotation speed of the drive motor 31 and adjusting the sliding speed of the slide 35 and the rotation speed of the drive gear 36, the interval time between the lifting of the diaphragm 1 to the reset can be controlled, so it is convenient for the staff to select an appropriate aeration and oxygen supply time.

[0033] As a preferred embodiment of the present invention, an adjusting rod 37 is fixedly installed between the two slides 35. The adjusting rod 37 is an adjustable telescopic rod, and the width of the separation box 23 is greater than the maximum distance between the two slides 35.

[0034] The two slides 35 are connected by an adjusting rod 37. When the device is adjusted, the distance between the two slides 35 is fixed by the adjusting rod 37. For the adjustable telescopic rod, during subsequent equipment maintenance, the distance between the two slides 35 can be artificially changed, so that the number of diaphragms 1 between the two slides 35 changes, and finally the number of diaphragms 1 affected by the confluence pipe 12 at the same time changes.

[0035] As a preferred embodiment of the present invention, a separation box 23 is detachably and fixedly installed on one side of the membrane frame 2. The top of the separation box 23 is designed with an opening. A lifting groove 4 is opened on the membrane frame 2. A lifting rod 41 is slidably installed in the lifting groove 4. The mounting seat 3 is fixedly installed at the top of the lifting rod 41. The separation box 23 is detachably and fixedly installed on the slide 35. When the lifting rod 41 is at the bottom end of the lifting groove 4, the drive gear 36 is meshed with the rotating ring 21.

[0036] The drainage buoyancy of the separation box 23 is greater than the total gravity of the step-by-step lifting and rotating mechanism and the separation box 23.

[0037] To further improve the convenience of equipment use, in the present invention, the arrangement of the lifting groove 4 and the lifting rod 41 enables the mounting seat 3, the sliding seat 35, and the partition box 23 to be lifted and lowered in the vertical direction. Since the partition box 23 is a cavity-type structure and the drainage buoyancy of the partition box 23 is greater than the total gravity of the step-by-step lifting and rotating mechanism and the partition box 23, when the membrane plate 1 is not lifted and rotated, the MBR membrane module is completely immersed in the sewage at this time. Under the action of the drainage buoyancy of the partition box 23, the step-by-step lifting and rotating mechanism and the partition box 23 are suspended on the liquid surface together. When it is necessary to lift the membrane plate 1 to return the sludge in the gap of the membrane plate 1 to the sewage, the connection between the sliding seat 35 and the partition box 23 is disassembled at this time. Under the action of gravity, the step-by-step lifting and rotating mechanism sinks downward until the mounting seat 3 is intercepted by the membrane frame 2. During this process, the lifting rod 41 and the lifting groove 4 guide the movement. It should be noted that before the sliding seat 35 and the partition box 23 are disassembled, the mounting seat 3 is tied with a rope. After the sludge between the membrane plates 1 is redispersed in the sewage, the staff can manually pull the rope to pull the step-by-step lifting and rotating mechanism back to the liquid surface again. Subsequently, the sliding seat 35 is connected to the partition box 23 again, and the step-by-step lifting and rotating mechanism can be made to be above the water surface by means of the buoyancy of the partition box 23. At the same time, the present invention can also be applied to the maintenance process of the MBR membrane module. During maintenance, it is necessary to control the sewage liquid level to drop until the top of the membrane frame 2 is exposed above the water surface. At this time, the partition box 23 descends, and the step-by-step lifting and rotating assembly is used to lift the multiple membrane plates 1 step by step to facilitate the staff to maintain the membrane plates 1. The presence of the partition box 23 provides a stable space for the maintenance of the membrane plates 1.

[0038] As a preferred embodiment of the present invention, brush pieces 43 are fixedly installed on both sides of the membrane plate 1. When two adjacent membrane plates 1 rotate relative to each other, the brush pieces 43 are in frictional contact with the membrane plate 1.

[0039] A support plate 42 is fixedly installed between two adjacent sliding seats 35. The support plate 42 is composed of a corrugated spring metal sheet. After the membrane plate 1 rotates completely, the connecting rod 22 is located on the moving path of the support plate 42.

[0040] The brush pieces 43 are all designed in an L shape. The brush pieces 43 are arranged along the edge of the membrane plate 1, and the brush pieces 43 on the side where the membrane plates 1 approach each other are arranged in a staggered manner.

[0041] In order to further improve the dredging and dispersing effect of the sludge between the membrane plates 1, brush pieces 43 are arranged on both sides of the membrane plates 1 in the present invention. The brush pieces 43 are composed of fixedly arranged bristles. When two adjacent membrane plates 1 move relative to each other, under the action of the brush pieces 43, the sludge in the gap between the membrane plates 1 can be pushed. When the membrane plates 1 are rotated, as the sliding seat 35 moves, the support plate 42 exerts a supporting effect on the membrane plates 1. As a result, when the support plate 42 moves with the sliding seat 35, it pushes the rotated membrane plates 1 to generate a small-amplitude rotation ring. The membrane plates 1 move up and down, enhancing the relative movement effect between two adjacent membrane plates 1. Cooperating with the brush pieces 43, the sludge on the surface of the membrane plates 1 is pushed. With the action of the water flow, the sludge is dispersed in the sewage. At the same time, the up-and-down undulation of the membrane plates 1 also has a pushing effect on the sewage, enhancing the flow effect of the sewage, and further enhancing the dispersing effect of the sludge in the sewage.

[0042] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention.

Claims

1. A treatment device for microbial filtration membrane sewage, comprising a sewage tank, a membrane plate (1), a confluence pipe (12) and a water collecting pipe (11); The membrane plates (1) are installed in the sewage tank at equal intervals. The water collecting pipes (11) are fixedly installed on the membrane plates (1). A plurality of the membrane plates (1) are conductively connected to the confluence pipe (12) through the water collecting pipes (11), and the confluence pipe (12) is externally connected to a pumping device; It is characterized in that: It further includes a convenient oxygen supply mechanism. The convenient oxygen supply mechanism improves the oxygen supply efficiency by adjusting the gap between the membrane plates (1). The convenient oxygen supply mechanism includes a membrane frame (2), a rotating ring (21), a connecting rod (22) and an aeration pipe group (27); The membrane frame (2) is a frame - type structure body. The whole membrane frame (2) is designed in a U - shape. The confluence pipe (12) is fixedly installed on one side of the membrane frame (2), and the membrane plates (1) are installed in the membrane frame (2) at equal intervals; The rotating rings (21) evenly distributed are rotatably installed on the confluence pipe (12). The connecting rods (22) are fixedly installed on the membrane plates (1), and the connecting rods (22) are fixedly connected to the rotating rings (21); One end of the water collecting pipe (11) far from the membrane plate (1) penetrates and is fixedly installed on the rotating ring (21). A docking hole (26) is opened on the confluence pipe (12); The aeration pipe group (27) is installed below the membrane plate (1), and the aeration pipe group (27) is externally connected to an aeration device; It further includes a step - by - step lifting and rotating mechanism. The step - by - step lifting and rotating mechanism cooperates with the convenient oxygen supply mechanism to gradually lift the membrane plates (1), thereby gradually expanding the gap inside the membrane frame (2).

2. The treatment device for microbial filtration membrane sewage according to claim 1, characterized in that: In the initial state, the water collecting pipe (11) is aligned and conductively connected with the docking hole (26). A telescopic groove (24) is opened on the rotating ring (21), and an elastic sealing ring (25) is installed in the telescopic groove (24). The water collecting pipe (11) extends to the inner side of the elastic sealing ring (25).

3. A treatment device for microbial filtration membrane sewage according to claim 1, characterized in that: The step - by - step lifting and rotating mechanism includes a mounting seat (3), a driving motor (31), a driving gear (36), a transmission rod (32) and a guiding lead screw (33); The mounting seat (3) is installed on the membrane frame (2), and the driving motor (31) is fixedly installed on the mounting seat (3); The mounting seat (3) rotatably installs a transmission rod (32) and a guiding lead screw (33) arranged in parallel. The output end of the driving motor (31) is fixedly connected to the transmission rod (32), and the transmission rod (32) is belt - driven to the guiding lead screw (33); A sliding seat (35) is jointly installed on the transmission rod (32) and the guiding lead screw (33). The sliding seat (35) is slidably connected to the transmission rod (32) and is in screw drive connection with the guiding lead screw (33); The driving gear (36) is rotatably installed on the sliding seat (35). The transmission rod (32) is in transmission connection with the driving gear (36) through a transmission part. The rotating ring (21) is designed in an incomplete gear shape, and the driving gear (36) is meshed with the rotating ring (21).

4. The treatment device for microbial filtration membrane sewage according to claim 3, characterized in that: The number of the sliding seats (35) is two, the driving gears (36) on the two sliding seats (35) rotate in opposite directions, and the driving gear (36) at the front end of the moving direction pushes the rotating ring (21) to rotate towards the separation box (23).

5. A treatment device for microbial filtration membrane sewage according to claim 4, characterized in that: An adjusting rod (37) is fixedly installed between the two sliding seats (35), and the adjusting rod (37) is an adjustable telescopic rod.

6. The treatment device for microbial filtration membrane sewage according to claim 4, characterized in that: A separation box (23) is detachably and fixedly installed on one side of the sliding seat (35), and the top of the separation box (23) is designed with an opening.

7. The treatment equipment for microbial filtration membrane sewage according to claim 6, characterized in that: A lifting groove (4) is formed in the membrane frame (2), a lifting rod (41) is slidably installed in the lifting groove (4), the mounting seat (3) is fixedly installed at the top of the lifting rod (41), when the lifting rod (41) is located at the bottom end of the lifting groove (4), the driving gear (36) is meshed with the rotating ring (21), and the drainage buoyancy of the separation box (23) is greater than the total gravity of the step-by-step lifting and rotating mechanism and the separation box (23).

8. A treatment device for microbial filtration membrane sewage according to claim 4, characterized in that: A support plate (42) is fixedly installed between two adjacent sliding seats (35), and the support plate (42) is composed of a corrugated spring metal sheet. When the membrane plate (1) rotates completely, the corresponding connecting rod (22) is located on the moving path of the support plate (42).

9. The treatment device for microbial filtration membrane sewage according to claim 8, wherein: Brush pieces (43) are fixedly installed on both sides of the membrane plate (1). When two adjacent membrane plates (1) rotate relatively, the brush pieces (43) are in frictional contact with the membrane plate (1).

10. The treatment device for microbial filtration membrane sewage according to claim 9, characterized in that: The brush pieces (43) are all designed in an L shape, the brush pieces (43) are arranged along the edge of the membrane plate (1), and the brush pieces (43) on the side where the membrane plates (1) approach each other are arranged in a staggered manner.

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