An automatic cleaning device for submerged ultrafiltration membrane

Abstract

The utility model provides a kind of submerged ultrafiltration membrane automatic cleaning device, comprising: frame, scrubbing component;Scrubbing component includes support tube, inner tube being arranged in support tube inside, inner tube is connected with hose, support tube outside is fixed with brush holder, brush holder is equipped with bristle, inner tube is connected with multiple spray pipes, multiple spray pipes are all through outer support tube and brush holder;The hose of one scrubbing component is connected with water pump, the hose of another scrubbing component is connected with air pump;Outer support tube both ends are fixed with the sliding block matched with vertical guide rail respectively;Driving mechanism, for driving scrubbing component lifting and lowering. Driving mechanism drives the up-and-down reciprocating motion of scrubbing component to brush and clean the both sides of membrane, can replace manual cleaning, and cleaning efficiency is high. While the operation of scrubbing component, water and gas are supplied to the inner tube of scrubbing component by water pump and air pump, and pressurized water and gas are sprayed to the membrane surface through spray pipe, so that the pollutants adhered to the membrane surface can be washed away.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment membrane cleaning equipment, specifically an automatic cleaning device for immersion ultrafiltration membranes. Background Technology

[0002] In the field of wastewater treatment and membrane cleaning and reuse, membrane treatment is one of the main processes in wastewater treatment. Wastewater is separated by the micropores on the membrane, which traps sludge, organic pollutants, and suspended solids on the outside of the membrane, while clean water is collected and discharged through the hollow part of the membrane, thus achieving the separation of clean water. However, large particulate pollutants can adhere to the membrane surface and clog the membrane pores.

[0003] The application of membrane technology in wastewater treatment can effectively remove harmful substances such as suspended solids, bacteria, viruses, and heavy metal ions from wastewater. Compared with traditional wastewater treatment processes, membrane technology requires less equipment space, can achieve automated operation, reduces the risk of secondary pollution, and due to its high separation efficiency, produces less residual sludge. It is easy to operate and manage, does not produce any noise or odor during operation, and can effectively recover energy from wastewater.

[0004] With the use of wastewater treatment membranes, various pollutants in the wastewater gradually adhere to the membrane surface, leading to a reduction in the effective filtration area and a decrease in membrane flux. Pollutant adhesion to the membrane surface and pores affects the membrane's pore size and water flow rate, thus impacting its filtration efficiency. Without timely cleaning, pollutants accumulate and attract more impurities, exacerbating membrane fouling, altering its physical and chemical properties, increasing cleaning difficulty, and potentially shortening the membrane's lifespan and increasing operating costs. Cleaning wastewater treatment membranes can prevent a continuous decline in membrane flux, preventing a reduction in the wastewater treatment system's capacity and ensuring it meets actual treatment needs.

[0005] After the wastewater treatment membrane is installed, the membrane module is located entirely within the membrane tank. The maintenance space around the membrane module within the tank is limited, and the tank itself is often a confined space, making disassembly and cleaning inconvenient, complex, and costly. Furthermore, for large tanks, draining the water takes considerable time. Currently, membrane cleaning is mostly done manually, which is physically demanding and time-consuming for workers. Therefore, there is an urgent need to design an automated membrane cleaning device.

[0006] Against this backdrop, it is necessary to improve and optimize the online membrane cleaning method to solve the existing technical problems. Utility Model Content

[0007] In order to solve the problems existing in the prior art, this utility model provides an automatic cleaning device for immersion ultrafiltration membranes.

[0008] To achieve the above objectives, this utility model employs the following technical solution:

[0009] An automatic cleaning device for submersible ultrafiltration membranes includes:

[0010] The frame includes a top plate and two first support legs and two second support legs disposed at the bottom of the top plate, and each of the first support legs and the second support legs is provided with a vertical guide rail.

[0011] A brushing assembly is provided between the two first support legs and between the two second support legs. Each brushing assembly includes a support tube and an inner tube disposed inside the support tube. One end of the inner tube is sealed, and the other end passes through the support tube and is connected to a flexible hose. A brush holder is fixed to the outside of the support tube, and the brush holder has bristles. Multiple spray nozzles are connected to the inner tube, evenly arranged along its length, and all spray nozzles penetrate the support tube and the brush holder. A water pump is connected to the flexible hose of one brushing assembly, and an air pump is connected to the flexible hose of the other brushing assembly. Slider blocks that cooperate with the vertical guide rail are fixed to both ends of the support tube.

[0012] A drive mechanism is used to drive the brushing assembly to move up and down along the vertical guide rail.

[0013] Preferably, the automatic cleaning device for immersion ultrafiltration membranes further includes a PLC controller, and the water pump, air pump and drive mechanism are all electrically connected to the PLC controller.

[0014] Preferably, the driving mechanism includes two rotating shafts disposed on the top of the top plate, each rotating shaft having a winding reel at both ends, a wire rope on the winding reel, the wire rope passing through the top plate and connected to the slider; a motor is disposed on the top of the top plate, the motor being connected to the two rotating shafts respectively.

[0015] Preferably, the motor and the rotating shaft are connected by a transmission belt.

[0016] Preferably, both the water pump and the air pump are located at the top of the top plate, and the hose passes through the top plate.

[0017] Preferably, all of the nozzles are arranged horizontally.

[0018] Preferably, a plurality of spray nozzles are provided on both sides of the inner tube in the horizontal radial direction; and brush bristles are provided on both sides of the brush holder along the horizontal radial direction of the inner tube.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The immersion ultrafiltration membrane automatic cleaning device of this utility model can be placed in the membrane disposal area of ​​the sewage treatment process. The drive mechanism drives the brushing component to reciprocate up and down to brush and clean both sides of the membrane, which can replace manual cleaning.

[0021] 2. While the washing assembly is running, water and air are supplied to the inner tube of the washing assembly through water pump and air pump. Pressurized water and air are sprayed onto the membrane surface through the nozzle, which can wash away the pollutants attached to the membrane surface.

[0022] 3. During membrane operation, it can be used without dewatering or drainage, and can be used directly in the presence of water without emptying the membrane tank. During use, it will not affect the flow of sewage around the membrane or the treatment effect. When the membrane stops operating, it can also be cleaned without water.

[0023] 4. The PLC controller is set to adjust the output of the water pump, air pump and drive mechanism, so that the device can operate in different states and the cleaning device can be adjusted to adapt to various membrane cleaning conditions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 2 This is a side view of the structure of this utility model;

[0026] Figure 3 This is a top view of the structure of this utility model;

[0027] Figure 4 This is a cross-sectional view of the brushing component in this utility model.

[0028] Explanation of reference numerals in the attached figures

[0029] 1-Frame, 2-Top plate, 3-First support leg, 4-Second support leg, 5-Vertical guide rail, 6-Brush assembly, 7-Support tube, 8-Inner tube, 9-Hose, 10-Brush holder, 11-Brush bristles, 12-Spray nozzle, 13-Water pump, 14-Air pump, 15-Slider, 16-Shaft, 17-Roller, 18-Wire rope, 19-Motor, 20-Transmission belt. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0031] The connections mentioned in this utility model are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolt connections, snap-fit ​​connections, pin connections, and hinge connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for a fixed connection, and a bolted connection can be chosen for a detachable connection.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0033] like Figures 1 to 4 As shown, an automatic cleaning device for submerged ultrafiltration membranes includes: a frame 1, the frame 1 including a top plate 2 and two first support legs 3 and two second support legs 4 disposed at the bottom of the top plate 2, each of the first support legs 3 and the second support legs 4 being provided with a vertical guide rail 5; a brushing assembly 6, each of the two first support legs 3 and the two second support legs 4 being provided with a brushing assembly 6; the brushing assembly 6 includes a support tube 7 and an inner tube 8 disposed inside the support tube 7, one end of the inner tube 8 being sealed, and the other end passing through the support tube 7 and connected to a flexible hose 9. A brush holder 10 is fixed to the outside of the support tube 7, and the brush holder 10 is provided with bristles 11. A plurality of spray pipes 12 are connected to the inner tube 8 and are evenly arranged along its length. The plurality of spray pipes 12 are preferably arranged horizontally and all of the plurality of spray pipes 12 penetrate the support tube 7 and the brush holder 10. A water pump 13 is connected to the hose 9 of one of the brushing components 6, and an air pump 14 is connected to the hose 9 of the other brushing component 6. A slider 15 that cooperates with the vertical guide rail 5 is fixed to both ends of the support tube 7. A driving mechanism is used to drive the brushing component 6 to move up and down along the vertical guide rail 5.

[0034] The submerged ultrafiltration membrane automatic cleaning device of this embodiment can be placed in the membrane treatment area of ​​wastewater treatment processes (including biochemical MBR membrane processes, submerged membrane treatment processes, etc.). The device is placed in water, with the top plate 2 above the water surface to avoid damage to the motor and pump. Multiple sets can be placed in the treatment area depending on the number of membrane modules and treatment time requirements; the frame 1 can be welded or assembled from plates, and its size is determined according to the specific membrane treatment process dimensions of different projects. The submerged ultrafiltration membrane automatic cleaning device of this embodiment needs to be clamped onto a single membrane module, which is located inside the frame 1. Two brushing components 6 are located on both sides of the single membrane module and are in contact with it. When membrane cleaning is required, the drive mechanism drives the two brushing components 6 to move up and down on both sides of the single membrane module, cleaning it with the brush bristles 11 (normally, the two brushing components 6 should be symmetrical in the horizontal direction and at the same height to ensure that the force is evenly distributed on both sides during cleaning; in this embodiment, the two brushing components 6 are drawn at different heights for easy identification). While the scrubbing assembly 6 is operating, water and air are supplied to the inner pipe 8 of the scrubbing assembly 6 via water pump 13 and air pump 14. Pressurized water and air are sprayed onto the membrane surface through nozzle 12 to wash away contaminants adhering to the membrane surface. The membrane is cleaned through both water washing and air scrubbing. Water washing mainly relies on shear force and reverse pressure to remove contaminants from the membrane surface. Air scrubbing is a fundamental means of controlling fouling in MBR. By agitating the airflow, the membrane fibers are allowed to swing freely in the water, reducing the adhesion of contaminants. At the same time, the generated bubbles and water flow have a certain scouring and peeling effect on the contaminants on the membrane fiber surface. The nozzle 12 uses a small orifice, the specific orifice diameter of which can be determined by the sprayed water volume and pressure combined with the nozzle diameter to form the required spray velocity. Furthermore, the automatic cleaning device for submerged ultrafiltration membranes in this embodiment can be used without dewatering or draining water while the membrane is running. It can be used directly with water without emptying the membrane tank. It does not affect the flow of wastewater around the membrane or the treatment effect during use. The membrane can also be cleaned without water when it is not running.

[0035] It should be noted that the length of the hose 9 should be sufficient to accommodate the lifting and lowering stroke of the scrubbing assembly 6, with a certain safety margin allowed. The water pump 13 is connected to an external water source.

[0036] Furthermore, the automatic cleaning device for submerged ultrafiltration membranes also includes a PLC controller, and the water pump 13, air pump 14, and drive mechanism are all electrically connected to the PLC controller. The PLC controller adjusts the outputs of the water pump 13, air pump 14, and drive mechanism, enabling the device to operate in different states and adapt to various membrane cleaning conditions. Controlling the various actuators via a PLC controller is existing technology, therefore it will not be described in detail in this embodiment.

[0037] In some optional embodiments, the drive mechanism includes two rotating shafts 16 disposed on the top of the top plate 2. Each rotating shaft 16 has a winding reel 17 at both ends, and a steel wire rope 18 is mounted on each reel 17. The steel wire rope 18 passes through the top plate 2 and connects to the slider 15. A motor 19 is disposed on the top of the top plate 2, and the motor 19 is connected to both rotating shafts 16 for transmission. In this embodiment, one rotating shaft 16 corresponds to one brushing assembly 6. One rotating shaft 16 pulls the sliders 15 at both ends of the brushing assembly 6 via two steel wire ropes 18, thereby driving the brushing assembly 6. Alternatively, one motor 19 can simultaneously drive both rotating shafts 16, thereby simultaneously driving both brushing assemblies 6. Specifically, the motor 19 and the rotating shafts 16 can be connected via a transmission belt 20. It is understood that the drive mechanism is not limited to the above structure and can also be other forms, such as a lead screw drive.

[0038] In some optional embodiments, the water pump 13 and the air pump 14 are both located on the top of the top plate 2, and the top plate 2 has an opening for the hose 9 to pass through the top plate 2.

[0039] In some alternative embodiments, such as Figure 4 As shown, multiple nozzles 12 are respectively provided on both sides of the horizontal radial direction of the inner tube 8; bristles 11 are provided on both sides of the horizontal radial direction of the nozzles 12 on the brush holder 10. Since the membranes are often arranged in multiple groups, by providing bristles 11 on both sides of the horizontal radial direction of the nozzles 12 on the brush holder 10 and multiple nozzles 12 on both sides of the horizontal radial direction of the nozzles 12, and arranging a brushing assembly 6 between two groups of membranes so that it contacts both groups of membranes, a brushing assembly 6 can clean two groups of membranes simultaneously, which can reduce the number of devices required.

[0040] The above embodiments are merely illustrative examples of this patent and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of this patent, they are all within the scope of protection of this patent.

Claims

1. An automatic cleaning device for submersible ultrafiltration membranes, characterized in that, include: The frame (1) includes a top plate (2) and two first support legs (3) and two second support legs (4) disposed at the bottom of the top plate (2). Vertical guide rails (5) are provided on the first support legs (3) and the second support legs (4). A brushing assembly (6) is provided between the two first support legs (3) and between the two second support legs (4); the brushing assembly (6) includes a support tube (7) and an inner tube (8) disposed inside the support tube (7). One end of the inner tube (8) is sealed, and the other end passes through the support tube (7) and is connected to a hose (9). A brush seat (10) is fixed outside the support tube (7). The brush seat (10) is provided with bristles (11). Multiple spray pipes (12) are evenly arranged along its length on the inner tube (8). The multiple spray pipes (12) all pass through the support tube (7) and the brush seat (10); a water pump (13) is connected to the hose (9) of one of the brushing assemblies (6), and an air pump (14) is connected to the hose (9) of the other brushing assembly (6); sliders (15) that cooperate with the vertical guide rail (5) are fixed at both ends of the support tube (7). A drive mechanism is used to drive the brushing assembly (6) to move up and down along the vertical guide rail (5).

2. The automatic cleaning device for submersible ultrafiltration membranes according to claim 1, characterized in that: The automatic cleaning device for the submerged ultrafiltration membrane also includes a PLC controller, and the water pump (13), air pump (14) and drive mechanism are all electrically connected to the PLC controller.

3. The automatic cleaning device for submersible ultrafiltration membranes according to claim 1, characterized in that: The driving mechanism includes two rotating shafts (16) disposed on the top of the top plate (2). Each rotating shaft (16) has a winding reel (17) at both ends. A wire rope (18) is disposed on the winding reel (17). The wire rope (18) passes through the top plate (2) and is connected to the slider (15). The top plate (2) is equipped with a motor (19), which is connected to the two rotating shafts (16) respectively.

4. The automatic cleaning device for submersible ultrafiltration membranes according to claim 3, characterized in that: The motor (19) is connected to the shaft (16) via a transmission belt (20).

5. The automatic cleaning device for an immersion ultrafiltration membrane according to claim 1, characterized in that: The water pump (13) and air pump (14) are both located on the top of the top plate (2), and the hose (9) passes through the top plate (2).

6. The automatic cleaning device for submersible ultrafiltration membranes according to claim 1, characterized in that: All of the nozzles (12) are horizontally arranged.

7. The automatic cleaning device for submersible ultrafiltration membranes according to claim 1, characterized in that: The inner tube (8) has multiple nozzles (12) on both sides of its horizontal radial direction. The brush holder (10) is provided with bristles (11) on both sides of the inner tube (8) in the horizontal radial direction.

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