A system for dialing, aeration and automatic backwash of submerged ultrafiltration membrane modules

Abstract

The application provides a position dialing system, an aeration system and an automatic backwashing submerged ultrafiltration membrane module, and relates to the technical field of water treatment. The position dialing system comprises a dial ring structure, a dial rod mechanism and a stable return elastic structure. The dial ring structure is used for connecting the bottom end of the aeration system. The dial ring structure is composed of a plurality of dial positions connected in a closed dial ring. The dial position comprises a containing part and a bearing part, which are connected in sequence. The dial rod mechanism is used for dialing the dial ring structure. When the bubble activity range of the aeration system is changed, the dial ring structure can also cooperate with the stable return tension spring structure to produce return shaking, so that the impurities on the aeration system are shaken off, the influence of the impurities on the subsequent working condition of the aeration system is reduced, and the stable return tension spring structure has the effects of pulling back the dial ring structure, holding the aeration system and keeping the aeration system stable.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and more specifically, to an automatically backwashed submerged ultrafiltration membrane module. Background Technology

[0002] The entire submerged ultrafiltration membrane unit is immersed in the water in the membrane tank and produces water under negative pressure by a suction pump. The backwashing of the submerged ultrafiltration membrane is achieved by cutting off the production water and the backwash pump back-pressing the clean water in the production water tank into the membrane cavity, which penetrates the membrane fibers and washes them outward. Combined with the air bubbles produced by bottom aeration, a continuous air-scrubbing effect is generated, which washes and shakes the membrane fibers on the hollow fiber curtain, removes the sludge filter cake from the membrane surface, prevents membrane pore blockage, and achieves dual removal of pollutants.

[0003] In related technologies, the aeration system at the bottom of the submerged ultrafiltration membrane module with automatic backwashing has three main structures: fixed aeration, pneumatic self-swinging aeration, and underwater motor-driven oscillating aeration. Fixed aeration only vertically and directionally washes and shakes the membrane fibers on the hollow fiber curtain. Because the bubble position is fixed, the range of washing and shaking on the membrane fibers is limited. Furthermore, the aeration holes are prone to clogging due to long-term static soaking of sludge, resulting in decreased aeration efficiency. Pneumatic self-swinging aeration allows for changing the aeration position, but the back thrust generated by air jets through the air holes requires high air pressure and can only achieve single horizontal translational movement. Underwater motor-driven oscillating aeration places high demands on the drive components, seals, and underwater transmission joints. The aeration system operates smoothly, but its cleaning effect on accumulated impurities on the aeration system is also poor.

[0004] For the reasons mentioned above, the motion structure of existing aeration systems requires underwater components or increased aeration pressure to achieve pneumatic self-oscillation, thereby driving the aeration system. Therefore, how to achieve multi-directional movement of the aeration system without using underwater components or increasing aeration pressure, and how to reduce the accumulation of impurities on the aeration system during movement, has become a technical problem that needs to be solved. Summary of the Invention

[0005] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a positioning system, an aeration system, and an automatic backwashing submerged ultrafiltration membrane module. The positioning system utilizes a lever mechanism to move a dial ring structure, thereby changing the bubble activity range of the aeration system. At the same time, the dial ring structure, in conjunction with a stabilizing return spring structure, generates a return vibration, causing impurities on the aeration system to be shaken off, reducing the impact of impurities on the subsequent operation of the aeration system. Furthermore, the stabilizing return spring structure, while having the effect of pulling the dial ring structure back to its original position, also holds the aeration system in place, thus maintaining the stability of the aeration system.

[0006] This application provides a shifting system, including: a shift ring structure, a shift lever mechanism, and a stabilizing and returning elastic structure.

[0007] The ring structure is used to connect to the bottom of the aeration system. The ring structure consists of multiple actuating positions connected end to end to form a closed ring. Each actuating position includes a receiving part and a supporting part, which are connected in sequence. The internal space formed by the receiving part is the receiving position, and the inner sidewall of the supporting part is the actuating slope. The lower end of the lever mechanism is configured to drive the ring structure along the actuating slope. After the lower end of the lever mechanism passes the actuating slope, it slides into the receiving position, causing the lower end of the lever mechanism to disengage from the inner wall of the ring structure. The stabilizing and returning elastic structure is connected to the ring structure.

[0008] According to some embodiments of this application, the receiving portion is composed of a reverse-character folded segment and an arc-shaped connecting segment. The front end of the reverse-character folded segment is fixedly connected to the outside of the previous supporting portion. One end of the arc-shaped connecting segment is fixedly connected to the tail end of the reverse-character folded segment. The arc of the arc-shaped connecting segment protrudes outward. One end of the supporting portion is fixedly connected to the other end of the arc-shaped connecting segment. The other end of the supporting portion is inclined inward.

[0009] According to some embodiments of this application, a support frame is provided between the outer side of the abutment portion and the outer side of the front end of the reverse-angle segment. The support frame is used to connect the bottom end of the aeration system, and the upper end of the stabilizing and returning elastic structure is fixed to the lower side of the support frame.

[0010] According to some embodiments of this application, the lever mechanism includes a drive shaft and a double lever, the double lever being fixedly connected to the bottom end of the drive shaft, the double lever being located within the dial ring structure, and the width of the dial ring structure being greater than the thickness of the double lever.

[0011] This application also provides an aeration system, which includes a positioning system, an air supply pipeline, a multi-point suspension component, and an aeration pipe.

[0012] The gas supply pipelines are symmetrical and connected to each other, and the dial ring structure is connected to the gas supply pipelines; the upper ends of the gas supply pipelines are all suspended by the multi-point suspension components, and there is a movement gap between the gas supply pipelines and the multi-point suspension components; the two ends of the aeration pipe are respectively connected to the bottom ends of the two gas supply pipelines.

[0013] According to some embodiments of this application, the multi-point suspension component includes a lower fixed seat and a suspension wire rope. The lower fixed seat is fixedly sleeved on the upper end of the gas transmission pipeline. The lower end of the suspension wire rope is fixedly connected to the lower fixed seat through a collar. The lower fixed seat is suspended by the suspension wire rope. The upper ends of the suspension wire rope leave a gap for the gas transmission pipeline to move.

[0014] According to some embodiments of this application, the gas transmission pipeline includes a main gas transmission pipeline, a bend pipe, and a connecting pipe. Both ends of the connecting pipe are fixedly connected to the horizontally arranged bend pipe, and the outer ends of the bend pipe are fixedly connected to the vertically arranged main gas transmission pipeline.

[0015] This application also provides an automatic backwashing submerged ultrafiltration membrane module, including an aeration system and a submerged ultrafiltration membrane system;

[0016] The lower end of the aeration system passes through the submerged ultrafiltration membrane system, and a gap exists between the lower end of the aeration system and the submerged ultrafiltration membrane system.

[0017] According to some embodiments of this application, the submerged ultrafiltration membrane system includes a fixed frame, hollow fiber curtains, water collection pipes, and a buffer chamber. The hollow fiber curtains are respectively disposed on the left and right sides of the fixed frame, and the hollow fiber curtains on the same side are arranged at equal intervals. The water collection pipes are disposed on the front and rear sides of the top of the fixed frame. The upper ends of the hollow fiber curtains are all connected to the water collection pipes. The water collection pipes on the front and rear sides are respectively connected to the buffer chamber. The buffer chamber is provided with a product water port and a backwashing port on the left and right sides, respectively.

[0018] According to some embodiments of this application, the upper fixed seat is provided at the front and rear positions on both sides of the upper end of the submerged ultrafiltration membrane system. The upper fixed seat is provided with a circular movable gap. The upper part of the gas transmission pipeline passes through the circular movable gap. The upper end of the suspension steel wire rope is fixedly connected to the upper fixed seat by a collar. The upper ends of the four suspension steel wire ropes are all inclined outward.

[0019] The beneficial effects of this application are as follows: When the lever mechanism rotates, it contacts the actuating inclined surface inside the supporting part. The lever mechanism pushes the supporting part along the actuating inclined surface. After the lever mechanism passes the actuating inclined surface, it returns to its original position due to the tension of the four stabilizing return spring structures and the gravity of the aeration system and the ring structure itself. Due to the fast return speed, the aeration system vibrates. Due to inertia, the impurities accumulated on the aeration system are shaken off, reducing the impact of the impurities accumulated on the aeration system on aeration. The return of the ring structure prepares the lever mechanism to move the next section of the actuating inclined surface, and then to move the ring structure. In addition, the stabilizing and returning tension spring structure pulls the deflector structure downwards, thereby tightening the aeration system and keeping it stable. This reduces the swaying of the lower end of the aeration system caused by water flow, and also reduces the instability of the aeration system due to the change in buoyancy caused by the gas filling the system during operation. For example, without the stabilizing and returning tension spring structure, the buoyancy increases, offsetting most of the sinking effect of gravity, and the overall stability of the aeration system deteriorates.

[0020] The bottom of the lever mechanism is activated by four inclined surfaces around the ring structure. Each suspension point at the top of the aeration system is pulled upwards by four steel wire ropes arranged around the suspension point. The upper ends of the four steel wire ropes are fixed with a gap for movement of the upper part of the aeration system, allowing the upper part of the aeration system to move horizontally and swing like a swing within the gap. This allows the lower part of the aeration system to move with the ring structure, thus enabling the bubbles in the aeration system to move and generate within a planar range. This reduces the occurrence of poor local membrane fiber scouring and shaking effects in the submerged ultrafiltration membrane system due to the fixed position of the bubble generation.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural schematic diagram of an automatically backwashed submerged ultrafiltration membrane module according to an embodiment of this application;

[0024] Figure 2 This is a three-dimensional structural diagram of the dialing system according to an embodiment of this application;

[0025] Figure 3 This is a three-dimensional structural diagram of the dial ring structure and support frame according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the locator ring structure and double locator lever according to an embodiment of this application;

[0027] Figure 5 According to the embodiments of this application Figure 2 An enlarged 3D structural diagram at point A in the middle;

[0028] Figure 6 This is a partial three-dimensional structural schematic diagram of the lever mechanism according to an embodiment of this application;

[0029] Figure 7 This is a three-dimensional structural schematic diagram showing the connection and positional relationship of the aeration system according to an embodiment of this application on a submerged ultrafiltration membrane system;

[0030] Figure 8This is a three-dimensional structural schematic diagram of an aeration system according to an embodiment of this application;

[0031] Figure 9 According to the embodiments of this application Figure 8 Enlarged 3D structural diagram at point B;

[0032] Figure 10 This is a three-dimensional structural schematic diagram of an immersion ultrafiltration membrane system according to an embodiment of this application;

[0033] Icons: 100 - Submerged ultrafiltration membrane system; 110 - Mounting frame; 120 - Hollow fiber curtain; 130 - Water collection pipe; 140 - Buffer chamber; 150 - Upper mounting base; 160 - Reinforcing frame; 161 - Transverse reinforcing beam; 162 - Longitudinal reinforcing beam; 200 - Aeration system; 210 - Air supply pipeline; 211 - Main air supply pipe; 212 - Angle bend pipe; 213 - Connecting pipe; 220 - Multi-point suspension component; 221 - Lower mounting base; 222 - Hanging ring; 223 - Suspension Wire rope; 230-Connecting frame; 240-Aeration pipe; 250-Support seat; 300-Positioning system; 310-Position lever mechanism; 311-Drive shaft; 312-Double pole piece; 3121-Mounting seat; 3122-Position lever; 320-Position ring structure; 321-Positioning position; 3211-Receiving part; 3212-Supporting part; 330-Support frame; 340-Stable and return elastic structure; 341-First pull ring; 342-Second pull ring; 343-Hook tension spring. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The following description, with reference to the accompanying drawings, describes a positioning system, an aeration system, and an automatically backwashing submerged ultrafiltration membrane module according to embodiments of this application.

[0037] Please see Figures 1 to 4This application provides a positioning system 300, which includes a lever mechanism 310, a ring structure 320, and four stabilizing and returning elastic structures 340. The lever mechanism 310 rotates from bottom to top through the middle of the submerged ultrafiltration membrane system 100. The top of the lever mechanism 310 is configured to be driven by a stepper motor. The ring structure 320 is used to connect to the bottom of the aeration system 200. The ring structure 320 is a closed ring formed by multiple actuating positions 321 connected end to end. Each actuating position 321 includes a receiving portion 3. 211 and the supporting part 3212 are connected in sequence. The internal space formed by the supporting part 3211 is the receiving position, and the inner side wall of the supporting part 3212 is the actuating slope. The lower end of the lever mechanism 310 is configured to drive the ring structure 320 along the actuating slope. After the lower end of the lever mechanism 310 passes the actuating slope, the lower end of the lever mechanism 310 slides into the receiving position, so that the lower end of the lever mechanism 310 and the inner wall of the ring structure 320 are separated. The stabilizing and returning elastic structure 340 is connected to the ring structure 320. In this embodiment, four actuation positions 321 are provided. The lower end of the lever mechanism 310 is located inside the ring structure 320. After the lower end of the lever mechanism 310 passes over the actuation slope of the ring structure 320, a receiving position for the lower end of the lever mechanism 310 is provided inside the ring structure 320, so that the lower end of the lever mechanism 310 is separated from the inner wall of the ring structure 320. The upper ends of the four stabilizing and returning elastic structures 340 hold the ring structure 320 around its perimeter, and the lower ends of the four stabilizing and returning elastic structures 340 are all inclined outward and connected to the bottom end of the submerged ultrafiltration membrane system 100. The ring structure 320 is used to connect to the bottom end of the aeration system 200. Specifically, the ring structure 320 is a closed ring formed by connecting the four actuation positions 321 end to end.

[0038] Please see Figures 1 to 4The receiving part 3211 is composed of an inverted 7-shaped bend segment and an arc-shaped connecting segment. The front end of the inverted 7-shaped bend segment is fixedly connected to the outside of the previous supporting part 3212. One end of the arc-shaped connecting segment is fixedly connected to the tail of the inverted 7-shaped bend segment. The arc of the arc-shaped connecting segment protrudes outward. One end of the supporting part 3212 is fixedly connected to the other end of the arc-shaped connecting segment. The other end of the supporting part 3212 is inclined inward. The front end of the top of the inverted 7-shaped bend segment on the next actuating position 321 is fixedly connected to the outside of the inwardly inclined end of the supporting part 3212. The inner sidewall of the supporting part 3212 is an actuating slope. The internal space formed by the inverted 7-shaped bend segment and the arc-shaped connecting segment is the receiving part. The stepper motor is started, which drives the lever mechanism 310 to rotate. The lever mechanism 310 contacts the actuating inclined surface inside the supporting part 3212. The lever mechanism 310 pushes the supporting part 3212 along the actuating inclined surface. The reverse 7-shaped bend segment and the arc-shaped connecting segment follow. After the lever mechanism 310 passes the actuating inclined surface, it enters the receiving position and returns to its original position under the pulling force of the four stable return elastic structures 340 and the gravity of the aeration system 200 and the ring structure 320. Due to the fast return speed, the aeration system 200 vibrates. Due to inertia, the impurities accumulated on the aeration system 200 will be shaken off, reducing the impact of the impurities accumulated on the aeration system 200 on aeration. The return of the ring structure 320 prepares the lever mechanism 310 to move the next section of the actuating inclined surface and then move the ring structure 320. Furthermore, the stabilizing and returning elastic structure 340 pulls the lever structure 320 downwards, thereby tightening the aeration system 200, keeping it stable and reducing the swaying of the lower end of the aeration system 200 caused by water flow. It also prevents instability caused by the gas filling the aeration system 200 during operation, which alters its buoyancy. For example, without the stabilizing and returning elastic structure 340, the buoyancy increases, offsetting most of the sinking effect of gravity, thus reducing the overall stability of the aeration system 200. The stepper motor drives the lever mechanism 310 to move in 90° rotation increments.

[0039] Please see Figures 1 to 4A support frame 330 is provided between the outer side of the supporting part 3212 and the outer side of the front end of the inverted 7-shaped bend segment. The support frame 330 is used to connect the bottom end of the aeration system 200. Specifically, support seats 250 are provided on the left and right sides and the front and rear sides of the bottom end of the aeration system 200. The outer ends of the four support frames 330 are fixedly connected to the support seats 250 respectively, and the upper end of the stabilizing and returning elastic structure 340 is fixed to the lower side of the support frame 330. The support seats 250 are respectively provided on the connecting pipes 213 on the front and rear sides and the connecting frames 230 on the left and right sides. When the ring structure 320 is fixed by the support frame 330, the support frame 330 is fixed to the supporting part 3212 and the inverted 7-shaped bend segment through the top and side walls, so that the supporting part 3212 of the upper section of the actuating position 321 and the inverted 7-shaped bend segment of the lower section of the actuating position 321 form a reinforcing effect.

[0040] Please see Figures 1 to 5 The stabilizing and returning elastic structure 340 includes a first pull ring 341, a second pull ring 342, and a hook spring 343. The first pull ring 341 is fixedly connected to the lower side of the support frame 330. The second pull ring 342 is fixedly connected to the lower end of the submerged ultrafiltration membrane system 100 around its perimeter. The upper end of the hook spring 343 is hooked to the first pull ring 341, and the lower end of the hook spring 343 is hooked to the second pull ring 342. The lower end of the hook spring 343 is inclined outward. The second pull ring 342 is fixedly connected to the inner side of the transverse reinforcing beam 161 and the longitudinal reinforcing beam 162, respectively. The four hook springs 343 pull the support frame 330, thereby pulling the dial structure 320 and the bottom end of the aeration system 200. When the ring structure 320 moves, the elastic force of the hook spring 343 in the opposite direction of the movement increases. For example, when the ring structure 320 moves to the left front side, the elastic force of the hook spring 343 on the right rear side increases, while the elastic force of the hook spring 343 in the displacement direction decreases. Due to the imbalance of elastic forces between the hook springs 343, a resultant force is generated. Through the resultant force and the gravity of the aeration system 200 and the ring structure 320, the aeration system 200 and the ring structure 320 are driven back to their original positions.

[0041] Please see Figures 1 to 6The lever mechanism 310 includes a drive shaft 311 and a double lever 312. The drive shaft 311 rotates from bottom to top and passes through the middle of the submerged ultrafiltration membrane system 100. The double lever 312 is fixedly connected to the bottom end of the drive shaft 311 and is located inside the ring structure 320. The width of the ring structure 320 is greater than the thickness of the double lever 312. A stepper motor is installed at the top of the treatment tank. The stepper motor drives the drive shaft 311 to rotate in the middle of the fixing frame 110 of the submerged ultrafiltration membrane system 100. The drive shaft 311 drives the double lever 312 to rotate. The rotating double lever 312 actuates the ring structure 320. The width of the ring structure 320 is greater than the thickness of the double lever 312, which reduces the possibility of the double lever 312 disengaging from the ring structure 320 due to changes in the vertical position caused by the movement of the ring structure 320. The dual-lever member 312 actuates the ring structure 320 via four actuating inclined surfaces. The lower end of the aeration system 200 moves with the ring structure 320, changing the aeration position of the aeration system 200 and thus improving the situation where the aeration position is fixed, resulting in poor membrane fiber scouring and shaking effects. The dual-lever member 312 includes a mounting base 3121 and two levers 3122. The two levers 3122 are fixedly connected to the outside of the mounting base 3121 and are arranged at 90°, so that the levers 3122 can simultaneously actuate the two inclined surfaces of the two ring structures 320.

[0042] Please see Figures 1 to 8This application also provides an aeration system 200, including a positioning system 300, an air supply pipeline 210, a multi-point suspension component 220, a connecting frame 230, and an aeration pipe 240. In this embodiment, two air supply pipelines 210 are provided, symmetrically connected to each other. Specifically, the two air supply pipelines 210 are symmetrically arranged on the front and rear sides of the submerged ultrafiltration membrane system 100, and the bottoms of the two air supply pipelines 210 are fixed to each other by two connecting frames 230. A ring structure 320 is connected to the air supply pipeline 210. The upper ends of the air supply pipelines 210 are all suspended by the multi-point suspension component 220, and a gap is maintained between the air supply pipelines 210 and the multi-point suspension component 220 for movement. The two ends of the aeration pipe 240 are respectively connected to the bottom ends of the two air supply pipelines 210. In this embodiment, two connecting frames 230 are located at the left and right ends of the air supply pipeline 210, respectively. Aeration pipes 240 are fixedly connected to the bottom ends of the two air supply pipelines 210 at both ends. Aeration pipes 240 are located at the left and right ends of the air supply pipeline 210, with equal intervals between them at the same end. Both ends of the upper part of the air supply pipeline 210 are suspended by multi-point suspension components 220. A gap exists between the air supply pipeline 210 and the fixed position at the upper end of the multi-point suspension components 220, allowing for movement of the air supply pipeline 210. The two air supply pipelines 210 are fixed together by the connecting frames 230, forming a stable whole. The top of the air supply pipeline 210 extends above the water surface of the treatment tank, and the top of the air supply pipeline 210 is connected to the main air supply pipeline via a flexible hose, which accommodates the swinging motion of the top of the air supply pipeline 210. Gas from the main gas supply line is delivered into the gas delivery line 210 through a hose. The gas delivery line 210 delivers the gas into the aeration pipe 240, where it is aerated to generate bubbles.

[0043] Please see Figures 1 to 9 The multi-point suspension component 220 includes a lower fixed base 221, hanging rings 222, and suspension wire ropes 223. The lower fixed base 221 is fixedly sleeved at the left and right ends of the upper part of the air supply pipeline 210. The hanging rings 222 are fixedly connected to the upper side of the lower fixed base 221 around its perimeter. The suspension wire ropes 223 are provided with collars at both ends, and the lower end of the suspension wire ropes 223 is fixedly connected to the hanging rings 222 on the lower fixed base 221 through the collars. The lower fixed base 221 is fixedly sleeved at the upper end of the main air supply pipe 211. The suspension wire ropes 223 suspend the main air supply pipe 211 through the hanging rings 222 around the upper side of the lower fixed base 221. The four main air supply pipes 211 on the two air supply pipelines 210 form four overall suspension points. Each main air supply pipe 211 is supported by four suspension wire ropes 223 forming four suspension positions for each suspension point, thereby suspending the aeration system 200 as a whole.

[0044] Please see Figures 1 to 9The gas supply pipeline 210 includes a main gas supply pipe 211, a bend pipe 212, and a connecting pipe 213. Both ends of the connecting pipe 213 are fixedly connected to horizontally arranged bend pipes 212, and the outer ends of the bend pipes 212 are fixedly connected to vertically arranged main gas supply pipes 211. The bend pipes 212 and the connecting pipes 213 are located between the bottom end of the hollow fiber curtain 120 and the reinforcing frame 160. The bend pipes 212 connect the two wider connecting pipes 213 and the narrower main gas supply pipe 211, allowing the bend pipes 212 and the connecting pipes 213 to move freely at the bottom of the fixing frame 110 without interference from the fixing frame 110. Gas is delivered through the main gas supply pipe 211, through the bend pipes 212, into the connecting pipes 213, and then into the aeration pipe 240, where aeration generates bubbles.

[0045] Please see Figures 1 to 10 This application also provides an automatic backwashing submerged ultrafiltration membrane module, including: a submerged ultrafiltration membrane system 100 and an aeration system 200. The lower end of the aeration system 200 passes through the submerged ultrafiltration membrane system 100, and a movable gap exists between the lower end of the aeration system 200 and the submerged ultrafiltration membrane system 100. Each suspension point at the upper end of the aeration system 200 is inclined upward and taut by four steel wire ropes arranged around the suspension point, and the upper ends of the four steel wire ropes are fixed at positions to allow for the movable gap at the upper end of the aeration system 200. The bottom end of the lever mechanism 310 moves the lever structure 320 through four inclined surfaces around the lever structure 320. Each suspension point of the upper end of the aeration system 200 is pulled upward by four steel wire ropes arranged around the suspension point. The upper ends of the four steel wire ropes are fixed and have a gap for the upper end of the aeration system 200 to move. This allows the upper end of the aeration system 200 to move within the gap and swing like a swing. This allows the lower end of the aeration system 200 to move with the lever structure 320, thereby moving the lower end of the aeration system 200. This allows the bubbles in the aeration system 200 to move and generate within a plane, reducing the occurrence of poor local membrane fiber scouring and shaking effects on the submerged ultrafiltration membrane system 100 due to the fixed position of the bubble generation.

[0046] Please see Figures 1 to 10The submerged ultrafiltration membrane system 100 includes a fixed frame 110, a hollow fiber curtain 120, a water collection pipe 130, and a buffer chamber 140. The hollow fiber curtains 120 are respectively arranged on the left and right sides of the fixed frame 110, and the hollow fiber curtains 120 on the same side are arranged at equal intervals. The water collection pipe 130 is arranged on the front and rear sides of the top of the fixed frame 110. The upper ends of the hollow fiber curtains 120 are all connected to the water collection pipe 130. The water collection pipes 130 on the front and rear sides are respectively connected to the buffer chamber 140. The buffer chamber 140 is provided with a product water port and a backwash port on the left and right sides, respectively. The submerged ultrafiltration membrane system 100 is immersed in the water treatment tank. When the submerged ultrafiltration membrane system 100 is working, the product water pump draws water from the inner cavity of the membrane fibers in the hollow fiber curtain 120 through the water collection pipe 130 and the buffer chamber 140. Under the action of negative pressure, the water outside the membrane penetrates the membrane pores, and suspended solids, colloids, bacteria and viruses are trapped on the outer surface of the membrane fibers. The bottom of the submerged ultrafiltration membrane system 100 continuously aerates to generate bubbles to flush the membrane fibers and inhibit the accumulation of pollutants. When backwashing is required, the negative pressure at the permeate port of the annular buffer chamber 140 gradually decreases, while the water pressure at the backwash port gradually increases. By smoothly switching the pressure difference, the instantaneous impact damage to the membrane element during backwashing is reduced. Without the annular buffer chamber 140, if the pipeline valve is switched, the high-pressure backwash water will cause a huge positive and negative pressure difference to form instantly inside and outside the membrane fibers, which can easily crack the membrane fibers and detach the bonding joints of the membrane fibers, causing irreversible damage. After the water pressure at the backwash port stabilizes, the backwash water flows through the membrane pores of the membrane fibers to the treatment water tank. The backwash water flushes out the pollutants that clog the membrane pores, thus realizing the backwashing function.

[0047] Please see Figures 1 to 10 The submerged ultrafiltration membrane system 100 has a reinforcing frame 160 at its bottom. The reinforcing frame 160 includes a transverse reinforcing beam 161 and a longitudinal reinforcing beam 162. The transverse reinforcing beam 161 is fixedly connected between the left and right legs on the same transverse side at the bottom of the submerged ultrafiltration membrane system 100, and the longitudinal reinforcing beam 162 is fixedly connected between the front and rear legs on the same longitudinal side at the bottom of the submerged ultrafiltration membrane system 100. The transverse reinforcing beam 161 and the longitudinal reinforcing beam 162 enhance the overall stability of the bottom of the submerged ultrafiltration membrane system 100, and also provide support points for the bottom of the stabilizing and returning elastic structure 340.

[0048] Please see Figures 1 to 10The submerged ultrafiltration membrane system 100 has upper fixed seats 150 on both the front and rear sides of the upper end. The upper fixed seats 150 have a circular movable gap inside. The upper part of the gas pipeline 210 passes through the circular movable gap. The lower side of the upper fixed seat 150 is also fixedly connected to the hanging ring 222 around the circular movable gap. The traction position of the multi-point suspension component 220 is the suspension steel wire rope 223. The upper end of the traction position of the multi-point suspension component 220 is fixedly connected to the hanging ring 222 on the upper fixed seat 150 through a collar. Specifically, the upper end of the suspension steel wire rope 223 is fixedly connected to the hanging ring 222 on the upper fixed seat 150 through a collar. The upper ends of the traction positions of the multi-point suspension component 220 are all inclined outward. In this embodiment, the upper ends of the four suspension steel wire ropes 223 are all inclined outward. The main gas supply pipe 211 passes through the circular movable gap on the upper fixed seat 150. When the lower end of the main gas supply pipe 211 moves with the dial ring structure 320, the upper end of the main gas supply pipe 211 moves within the circular movable gap by being suspended by the suspension steel wire rope 223. In this embodiment, the upper fixed seat 150 is installed on the upper end of the submerged ultrafiltration membrane system 100, which is suitable for situations where the distance between the surface of the treated water and the top of the submerged ultrafiltration membrane system 100 is small. In other embodiments, the distance between the treated water surface and the top of the submerged ultrafiltration membrane system 100 is relatively large. Since it is necessary to consider that the hose is above the treated water surface to reduce the possibility of the hose entering the water, the top of the air supply pipe 210 is far from the suspension wire rope 223. If the top of the main air supply pipe 211 is far from the suspension wire rope 223, the lower end of the aeration system 200 swings, and the top of the aeration system 200 moves too much, making it inconvenient to install the hose. The upper fixing seat 150 is set at the top of the treated water tank (not shown in the figure) to ensure that the hose at the top of the main air supply pipe 211 is above the treated water surface, while reducing the range of motion of the top of the main air supply pipe 211.

[0049] Specifically, the working principle of this automatic backwashing submerged ultrafiltration membrane module is as follows: The submerged ultrafiltration membrane system 100 is immersed in the treatment water tank. When the submerged ultrafiltration membrane system 100 is working, the product water pump draws water from the inner cavity of the membrane fibers in the hollow fiber curtain 120 through the water collection pipe 130 and the buffer chamber 140. Under negative pressure, the water outside the membrane penetrates the membrane pores, and suspended solids, colloids, bacteria, and viruses are trapped on the outer surface of the membrane fibers. When backwashing is required, the backwash water flows through the membrane pores to the treatment water tank, flushing out the pollutants clogging the membrane pores, thus achieving the backwashing function.

[0050] When the aeration system 200 is working, the stepper motor is started, and the stepper motor drives the drive shaft 311 to rotate in the middle of the fixed frame 110 of the submerged ultrafiltration membrane system 100. The drive shaft 311 drives the double lever 312 to rotate. The double lever 312 contacts the actuating inclined surface on the inner side of two adjacent supporting parts 3212. The double lever 312 pushes the supporting parts 3212 along the actuating inclined surface. The reverse 7-shaped bend section and the arc-shaped connecting section follow, thereby causing the actuating ring structure 320 to move. The connecting pipe 213 and the connecting frame 230 move with the actuating ring structure 320. Since each main air supply pipe 211 is suspended by four suspension steel wire ropes 223 forming four suspension positions at each suspension point, the aeration system 200 is suspended as a whole. The upper end of the main air supply pipe 211 can realize translation within the movement gap and swing like a swing, realizing the follow-up of the main air supply pipe 211 and reducing interference. The deflector structure 320, through the connecting pipe 213 and the connecting frame 230, causes the position of the connecting pipe 213 and the aeration pipe 240 thereon to change. This, in turn, causes the bubbles in the aeration pipe 240 to move and generate within a planar range, reducing the occurrence of bubbles generated in a fixed position, which could lead to poor local membrane fiber scouring and shaking effects in the submerged ultrafiltration membrane system 100. During this process, the elastic force of the hook spring 343 in the opposite direction to the movement of the deflector structure 320 increases. For example, if the deflector structure 320 moves to the left front, the elastic force of the hook spring 343 on the right rear side increases, while the elastic force of the hook spring 343 in the direction of the deflector structure 320's displacement decreases. Due to the imbalance of elastic forces among the hook springs 343, a resultant force is generated. After the double lever 312 passes the actuation slope, it enters the receiving position inside the inverted 7-shaped bend section. Under the combined force of the four hook springs 343 and the gravity of the aeration system 200 and the detonator structure 320, it returns to its original position, causing the aeration system 200 to vibrate. Due to inertia, the impurities accumulated on the aeration system 200 will be shaken off, reducing the impact of the impurities on aeration. The return of the detonator structure 320 prepares for the double lever 312 to move the next section of the actuation slope, and then to move the detonator structure 320. In addition, the hook spring 343 pulls the ring structure 320 downwards, thereby tightening the aeration system 200, keeping the aeration system 200 stable, reducing the swaying of the lower end of the aeration system 200 caused by water flow, and when the aeration system 200 is working, the gas filling the aeration system 200 changes the buoyancy of the aeration system 200, which may lead to unstable position of the aeration system 200. For example, without the stabilizing and returning elastic structure 340, the buoyancy increases, and the buoyancy offsets most of the sinking effect of gravity, resulting in poor overall stability of the aeration system 200.

[0051] It should be noted that the specific model and specifications of the stepper motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0052] The power supply and operating principle of a stepper motor are clear to those skilled in the art and will not be described in detail here.

[0053] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

Claims

1. A dialing system, characterized in that, include: A ring structure (320) is used to connect the bottom end of the aeration system (200). The ring structure (320) is a closed ring formed by connecting multiple actuation positions (321) end to end. Each actuation position (321) includes a receiving part (3211) and a supporting part (3212). The receiving part (3211) and the supporting part (3212) are connected in sequence. The internal space formed by the receiving part (3211) is the receiving position, and the inner sidewall of the supporting part (3212) is the actuation slope. A lever mechanism (310) is configured to drive the ring structure (320) along the actuating slope. After the lower end of the lever mechanism (310) passes the actuating slope, the lower end of the lever mechanism (310) slides into the receiving position, causing the lower end of the lever mechanism (310) to separate from the inner wall of the ring structure (320). The stabilizing and returning elastic structure (340) is connected to the dial ring structure (320). The receiving part (3211) is composed of a reverse 7-shaped bend segment and an arc-shaped connecting segment. The front end of the reverse 7-shaped bend segment is fixedly connected to the outside of the previous supporting part (3212). One end of the arc-shaped connecting segment is fixedly connected to the tail of the reverse 7-shaped bend segment. The arc of the arc-shaped connecting segment protrudes outward. One end of the supporting part (3212) is fixedly connected to the other end of the arc-shaped connecting segment. The other end of the supporting part (3212) is inclined inward. A support frame (330) is provided between the outside of the supporting part (3212) and the outside of the front end of the reverse 7-shaped bend segment. The support frame (330) is used to connect the bottom end of the aeration system (200). The upper end of the stabilizing and returning elastic structure (340) is fixed to the lower side of the support frame (330).

2. The dialing system according to claim 1, characterized in that, The lever mechanism (310) includes a drive shaft (311) and a double lever (312). The double lever (312) is fixedly connected to the bottom end of the drive shaft (311). The double lever (312) is located inside the ring structure (320). The width of the ring structure (320) is greater than the thickness of the double lever (312).

3. An aeration system, said aeration system comprising the dialing system according to any one of claims 1-2, characterized in that, Also includes: Gas pipelines (210) are symmetrical and connected to each other, and the dial ring structure (320) is connected to the gas pipelines (210). The upper ends of the gas pipeline (210) are all suspended by the multi-point suspension component (220), and there is a gap between the gas pipeline (210) and the multi-point suspension component (220). An aeration pipe (240) is provided, with both ends of the aeration pipe (240) connected to the bottom ends of the two gas supply pipes (210).

4. The aeration system according to claim 3, characterized in that, The multi-point suspension component (220) includes a lower fixed seat (221) and a suspension wire rope (223). The lower fixed seat (221) is fixedly sleeved on the upper end of the gas pipeline (210). The lower end of the suspension wire rope (223) is fixedly connected to the lower fixed seat (221) through a collar. The lower fixed seat (221) is suspended by the suspension wire rope (223). The upper ends of the suspension wire rope (223) leave a gap for the gas pipeline (210) to move.

5. The aeration system according to claim 3, characterized in that, The gas pipeline (210) includes a main gas pipeline (211), a bend pipe (212) and a connecting pipe (213). Both ends of the connecting pipe (213) are fixedly connected to the horizontally arranged bend pipe (212), and the outer ends of the bend pipe (212) are fixedly connected to the vertically arranged main gas pipeline (211).

6. An automatically backwashed submerged ultrafiltration membrane module, comprising the aeration system according to any one of claims 3-5, characterized in that, Also includes: Submerged ultrafiltration membrane system (100); An aeration system (200) is provided, the lower end of which passes through the submerged ultrafiltration membrane system (100), and a gap is provided between the lower end of the aeration system (200) and the submerged ultrafiltration membrane system (100).

7. The automatically backwashed submerged ultrafiltration membrane module according to claim 6, characterized in that, The submerged ultrafiltration membrane system (100) includes a fixed frame (110), hollow fiber curtains (120), water collection pipes (130), and a buffer chamber (140). The hollow fiber curtains (120) are respectively arranged on the left and right sides of the fixed frame (110), and the hollow fiber curtains (120) on the same side are arranged at equal intervals. The water collection pipes (130) are arranged on the front and rear sides of the top of the fixed frame (110). The upper ends of the hollow fiber curtains (120) are all connected to the water collection pipes (130). The water collection pipes (130) on the front and rear sides are respectively connected to the buffer chamber (140). The buffer chamber (140) is provided with a product water port and a backwash port on the left and right sides, respectively.

8. The automatically backwashed submerged ultrafiltration membrane module according to claim 6, characterized in that, The submerged ultrafiltration membrane system (100) has upper fixed seats (150) on both sides of the upper end. The upper fixed seats (150) have a circular movable gap inside. The upper part of the gas pipeline (210) passes through the circular movable gap. The upper end of the traction position of the multi-point suspension component (220) is fixedly connected to the upper fixed seat (150) by a collar. The upper end of the traction position of the multi-point suspension component (220) is inclined outward.

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