Immersed ultrafiltration membrane assembly for wastewater treatment

Abstract

The invention provides an immersed ultrafiltration membrane assembly for wastewater treatment, which comprises a plurality of ultrafiltration membrane bodies, the top ends of the ultrafiltration membrane bodies are all provided with drainage assemblies, the bottom ends of the ultrafiltration membrane bodies are fixedly communicated with lower support pipes, and the immersed ultrafiltration membrane assembly also comprises an inner aeration assembly and an outer aeration assembly. The inside of the ultrafiltration membrane body is aerated through the inner aeration assembly, and water in the ultrafiltration membrane body is stirred, so that substances adhered to the inside of the ultrafiltration membrane body can be impacted and cleaned by the stirred water, and the difficulty of the substances adhered to the inside of the ultrafiltration membrane body is increased; the outer aeration assembly is arranged on the outer side of the ultrafiltration membrane body, substances adhering to the inner wall of the ultrafiltration membrane body can be disturbed and cleaned, adsorptive blockages in membrane holes can be removed, rotational flow can be formed in the process that aeration is achieved outside the ultrafiltration membrane body through the outer aeration assembly, bubbles are made to spirally rise, the outer surface of the ultrafiltration membrane body is disturbed, and the outer surface of the ultrafiltration membrane body is disturbed. A filter cake layer on the membrane surface of the ultrafiltration membrane body can be easily broken, and cleaning is realized.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment, and in particular relates to an immersion ultrafiltration membrane module for wastewater treatment. Background Technology

[0002] In wastewater treatment, submerged ultrafiltration membrane modules generate a filter cake layer on the outer surface of the ultrafiltration membrane during the wastewater treatment process, and adsorbent clogging substances easily adhere to the inner wall. Existing ultrafiltration membrane modules usually aerate the outside of the membrane, which is not convenient for aeration of the inside. The adsorbent clogging substances adhering to the inner wall of the ultrafiltration membrane cannot be cleaned, which easily causes clogging and affects the filtration performance of the ultrafiltration membrane. Summary of the Invention

[0003] In view of this, the present invention aims to provide a submerged ultrafiltration membrane module for wastewater treatment, in order to solve the technical problem that ultrafiltration membrane modules usually aerate the outside of the membrane, making it inconvenient to aerate the inside, and the adsorbent clogging material adhering to the inner wall of the ultrafiltration membrane cannot be cleaned, which easily causes clogging and affects the filtration performance of the ultrafiltration membrane.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A submerged ultrafiltration membrane module for wastewater treatment includes multiple ultrafiltration membranes, each with a drainage component at its top. A lower support pipe is fixedly connected to the bottom of each ultrafiltration membrane. The module also includes an internal aeration component and an external aeration component. The internal aeration component, located at the bottom of the lower support pipe, aerates the interior of the ultrafiltration membrane and agitates the water within it during aeration. The external aeration component, sleeved outside the lower support pipe, aerates the area around the ultrafiltration membrane and drives a swirling current in the water surrounding it, drawing air bubbles close to the membrane surface.

[0005] Furthermore, the drainage assembly includes an upper support pipe, an upper mounting ring is fixedly connected inside the upper support pipe, the bottom end of the upper mounting ring is fixedly connected to the top end of the ultrafiltration membrane, and a docking cover is threadedly connected to the top end of the upper support pipe, with an outlet pipe fixedly connected to the top end of the docking cover.

[0006] Furthermore, the ultrafiltration membrane is annular, and a lower mounting ring is fixedly connected to the bottom end of the ultrafiltration membrane. The lower mounting ring is fixedly connected to the inner wall of the lower support tube.

[0007] Furthermore, the internal aeration assembly includes a docking seat, which is disposed at the bottom end of the lower support pipe. An aeration head is fixedly inserted into the top of the docking seat. The aeration head is located inside the lower support pipe. A first air inlet pipe is fixedly connected to the bottom end of the aeration head. The aeration head includes a mixing chamber, a throat chamber, and a diffusion chamber. A water suction pipe is fixedly connected to the inner wall of the mixing chamber. A one-way valve is installed inside the water suction pipe.

[0008] Furthermore, a ring body is fixedly connected to the inner wall of the lower mounting ring, and a rotating seat is slidably connected to the surface of the ring body. The top of the rotating seat has a ring array of multiple bubble outlets, the bottom of the rotating seat is fixedly connected to a support shaft, and an impeller is fixedly sleeved on the surface of the support shaft. The impeller is located in the diffusion chamber, and the top of the rotating seat is fixedly connected to an agitator blade.

[0009] Furthermore, the external aeration assembly includes an annular shell, which is fitted over the lower support pipe. A second air inlet pipe is fixedly connected to the bottom of the annular shell. An aeration plate is fixedly connected to the inner wall of the annular shell, and micropores are formed on the surface of the aeration plate. An annular drainage chamber is fixedly connected to the top of the annular shell. The annular drainage chamber includes a swirling cavity, the inner diameter of which decreases from bottom to top. A spiral drainage plate is fixedly connected inside the swirling cavity, and the diameter of the spiral trajectory of the spiral drainage plate decreases from bottom to top. A bell-shaped diffuser is fixedly connected to the top of the annular drainage chamber.

[0010] Furthermore, the multiple ultrafiltration membranes are divided into three groups, with five ultrafiltration membranes in each group. An upper support plate is fixedly connected to the surface of the water outlet pipe at the top of the five ultrafiltration membranes in the same group. A lower support plate is provided at the bottom of the multiple docking seats. Multiple support grooves are opened on the top of the lower support plate. The docking seats are placed in the support grooves. The first air inlet pipe passes through the support groove and extends to the bottom of the lower support plate. Multiple annular shells are fixedly installed on the top of the lower support plate. The second air inlet pipe passes through the lower support plate and extends to the bottom of the lower support plate. Three support rods are fixedly connected to both sides of the lower support plate. The two ends of the three upper support plates are slidably inserted into the support rods. A threaded surface is opened at the top of the surface of the support rod. A pressing nut is threadedly connected to the surface of the threaded surface. The pressing nut contacts the top surface of the upper support plate.

[0011] Furthermore, a lower limiting ring is fixedly sleeved on the surface of each of the six support rods, and the lower limiting ring is located below the upper support plate.

[0012] Furthermore, the outlet pipes at the top of the ultrafiltration membranes in the same group are fixedly connected by a first branch pipe, and the ends of the three first branch pipes are connected by a manifold. The first air inlet pipes at the bottom of the ultrafiltration membranes in the same group are connected by a second branch pipe, and a first solenoid valve is fixedly installed on the upper part of the surface of the second branch pipe. The second air inlet pipes at the bottom of the ultrafiltration membranes in the same group are connected by a third branch pipe, and a second solenoid valve is fixedly installed on the upper part of the surface of the third branch pipe. The tops of the third branch pipe and the second branch pipe are connected by an air injection pipe.

[0013] Furthermore, a lower support base is fixedly installed at the bottom of the lower support plate, and an upper hanging base is fixedly connected to the top of the six support rods.

[0014] Compared with existing technologies, the submerged ultrafiltration membrane module for wastewater treatment described in this invention has the following advantages: (1) The present invention aerates the interior of the ultrafiltration membrane by means of an internal aeration component and agitates the water inside the ultrafiltration membrane, so that the agitated water impacts and cleans the substances adhering inside the ultrafiltration membrane, and increases the difficulty of substances adhering to the interior of the ultrafiltration membrane. In addition, the pulsed airflow generated by aeration will disturb and clean the substances adhering to the inner wall of the ultrafiltration membrane, thereby removing the adsorbed blockage inside the membrane pores. During the aeration process by means of an external aeration component outside the ultrafiltration membrane, a vortex will be formed, causing the bubbles to rise spirally and disturb the outer surface of the ultrafiltration membrane, which is conducive to breaking the filter cake layer on the surface of the ultrafiltration membrane and achieving cleaning.

[0015] (2) When the ultrafiltration membrane is aerated and cleaned, the gas is introduced into the first air inlet pipe. It can be connected to the external blower to supply gas. During the process of the gas passing through the mixing chamber quickly, a negative pressure is generated in the mixing chamber. The water around the aeration head will enter the mixing chamber through the water suction pipe and the one-way valve. After the water enters the mixing chamber, it will mix with the gas. Under the compression of the throat cavity, the mixture of gas and water will flow faster and then be quickly discharged through the diffusion cavity. The generated bubbles enter the ultrafiltration membrane and disturb and clean the adhesive on the inner wall of the ultrafiltration membrane.

[0016] During the process of the gas-liquid mixture being injected through the impeller, the impeller is driven to rotate. As the impeller rotates, it breaks up the air bubbles, forming small bubbles, and at the same time, it drives the rotating seat to rotate. The air bubbles generated at the bubble outlet on the rotating seat enter the interior of the ultrafiltration membrane, disturbing and cleaning the adhering substances on the inner wall of the ultrafiltration membrane. In addition, under the agitation of the stirring blades, the water inside the ultrafiltration membrane rotates and flows. The rotating water generates shear force on the inner wall of the ultrafiltration membrane, which, combined with the agitation and cleaning by the air bubbles, enhances the cleaning ability and is conducive to the thorough removal of substances adhering to the inner wall of the ultrafiltration membrane.

[0017] By connecting the second air inlet pipe to an external blower, airflow enters the annular shell. After passing through the micropores of the aeration bag, bubbles are formed. These bubbles pass through the swirling chamber and then into the bell-shaped diffuser. Finally, they move to the surface of the ultrafiltration membrane. Through the action of the swirling chamber, the airflow drives the water flow within the swirling chamber, causing the water to swirl. The swirling water diffuses out through the bell-shaped diffuser, creating a swirling flow around the ultrafiltration membrane. This external aeration swirling flow breaks down the filter cake layer on the surface of the ultrafiltration membrane and guides the bubbles towards the vicinity of the membrane. This promotes the disturbance of the ultrafiltration membrane surface by the bubbles and further enhances the ability to break down the filter cake layer on the ultrafiltration membrane surface. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the first overall structure of a submerged ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the lower support plate, support rod, lower support base and filter membrane body of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the upper support plate of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the lower support plate of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 5 This is a rear view structural cross-sectional view of the ultrafiltration membrane of an immersed ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 6 for Figure 5 Enlarged view of section A in the middle; Figure 7 for Figure 5 Enlarged view of section B; Figure 8 This is a schematic diagram of the first structure of the rotating seat of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the second structure of the rotating seat of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the lower support plate, support rod, lower support base, filter membrane body, second diversion pipe and third diversion pipe of an immersion ultrafiltration membrane module for wastewater treatment according to an embodiment of the present invention. Figure 11 for Figure 10 Enlarged view of section C.

[0019] Explanation of reference numerals in the attached figures: 1-Ultrafiltration membrane body; 2-Lower support tube; 3-Upper support tube; 4-Upper mounting ring; 5-Docking cover; 6-Water outlet pipe; 7-Lower mounting ring; 8-Auxiliary support tube; 9-Support column; 10-Docking seat; 11-Aeration head; 1101-Mixing chamber; 1102-Throat chamber; 1103-Diffusion chamber; 12-First air inlet pipe; 13-Water suction pipe; 14-One-way valve; 15-Ring body; 16-Rotating seat; 17-Bubble outlet; 18-Support shaft; 19-Impeller; 20-Agitator blade; 21-Annular shell; 22-Second air inlet pipe ; 23-Aeration plate; 24-Micropores; 25-Annular drainage chamber; 26-Swirl chamber; 27-Spiral drainage plate; 28-Bell-shaped diffuser; 29-Upper support plate; 30-Lower support plate; 31-Support groove; 32-Support rod; 3201-Threaded surface; 33-Lower pressure nut; 34-Lower limit ring; 35-First diverter pipe; 36-Combiner pipe; 37-Second diverter pipe; 38-First solenoid valve; 39-Third diverter pipe; 40-Second solenoid valve; 41-Air injection pipe; 42-Lower support seat; 43-Upper mounting seat. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 11 As shown, in one embodiment, a submerged ultrafiltration membrane module for wastewater treatment includes multiple ultrafiltration membranes 1. Each ultrafiltration membrane 1 has a drainage component at its top. A lower support pipe 2 is fixedly connected to the bottom of each ultrafiltration membrane 1. The module also includes an internal aeration component and an external aeration component. The internal aeration component is located at the bottom of the lower support pipe 2 and is used to aerate the interior of the ultrafiltration membrane 1, agitating the water inside the membrane 1 during aeration. The external aeration component is sleeved outside the lower support pipe 2 and is used to aerate the area around the ultrafiltration membrane 1. During aeration, it drives the water around the membrane 1 to swirl, entraining air bubbles near the membrane 1. The surface position; it should be understood that the internal aeration component aerates the interior of the ultrafiltration membrane 1 and agitates the water inside the ultrafiltration membrane 1, causing the agitated water to impact and clean the substances adhering inside the ultrafiltration membrane 1, and increasing the difficulty of substances adhering to the interior of the ultrafiltration membrane 1. In addition, the pulsed airflow generated by aeration will disturb and clean the substances adhering to the inner wall of the ultrafiltration membrane 1, thereby removing adsorbed blockages inside the membrane pores. During the aeration process achieved by the external aeration component on the outside of the ultrafiltration membrane 1, a vortex is formed, causing the bubbles to spiral upward and disturb the outer surface of the ultrafiltration membrane 1, which is conducive to breaking the filter cake layer on the surface of the ultrafiltration membrane 1 and achieving cleaning.

[0025] like Figure 1 , Figure 3 and Figure 5 As shown, the drainage assembly includes an upper support pipe 3, with an upper mounting ring 4 fixedly connected inside the upper support pipe 3. The bottom end of the upper mounting ring 4 is fixedly connected to the top end of the ultrafiltration membrane 1. A connecting cover 5 is threadedly connected to the top end of the upper support pipe 3, and an outlet pipe 6 is fixedly connected to the top end of the connecting cover 5. It should be understood that the threaded connection between the connecting cover 5 and the upper support pipe 3 enables the top end of the ultrafiltration membrane 1 to be covered, thereby achieving water drainage.

[0026] The ultrafiltration membrane 1 is annular, and a lower mounting ring 7 is fixedly connected to the bottom end of the ultrafiltration membrane 1. The lower mounting ring 7 is fixedly connected to the inner wall of the lower support tube 2. Specifically, an auxiliary support tube 8 is fixedly connected to the inner ring surface of the ultrafiltration membrane 1. The auxiliary support tube 8 is a mesh tube to maintain water permeability. Both ends of the auxiliary support tube 8 are fixedly connected to the lower mounting ring 7 and the upper mounting ring 4, respectively. Multiple support columns 9 are fixedly connected between the upper support tube 3 and the lower support tube 2. It should be understood that by positioning the upper mounting ring 4 and the lower mounting ring 7, both ends of the ultrafiltration membrane 1 are fixedly connected between the upper support tube 3 and the lower support tube 2, and the auxiliary support tube 8 and the support columns 9 facilitate stable support of the ultrafiltration membrane 1.

[0027] like Figure 5 and Figure 6 As shown, the internal aeration assembly includes a docking seat 10, which is located at the bottom end of the lower support pipe 2. An aeration head 11 is fixedly inserted into the top of the docking seat 10. The aeration head 11 is located inside the lower support pipe 2. A first air inlet pipe 12 is fixedly connected to the bottom end of the aeration head 11. The aeration head 11 includes a mixing chamber 1101, a throat chamber 1102, and a diffusion chamber 1103. A water suction pipe 13 is fixedly connected to the inner wall of the mixing chamber 1101. A one-way valve 14 is installed inside the water suction pipe 13. It should be understood that when aeration cleaning is performed inside the ultrafiltration membrane 1, the first air inlet pipe 12 is vented. The gas can be supplied by connecting to an external blower. As the gas passes through the mixing chamber 1101 quickly, a negative pressure is generated inside the mixing chamber 1101. Water around the aeration head 11 enters the mixing chamber 1101 through the water suction pipe 13 and the one-way valve 14. The water in the mixing chamber 1101 mixes with the gas. Under the compression of the throat chamber 1102, the gas and water mixture will flow faster and then be quickly discharged through the diffusion chamber 1103. The generated bubbles enter the ultrafiltration membrane 1 and disturb and clean the adhesive on the inner wall of the ultrafiltration membrane 1.

[0028] like Figure 5 , Figure 6 , Figure 8 and Figure 9As shown, a ring body 15 is fixedly connected to the inner wall of the lower mounting ring 7. A rotating seat 16 is slidably connected to the surface of the ring body 15. Multiple bubble outlets 17 are arranged in a ring array at the top of the rotating seat 16. A support shaft 18 is fixedly connected to the bottom of the rotating seat 16. An impeller 19 is fixedly sleeved on the surface of the support shaft 18. The impeller 19 is located within the diffusion chamber 1103. An agitator 20 is fixedly connected to the top of the rotating seat 16. It should be understood that during the process of the gas-liquid mixture being injected through the impeller 19, the impeller 19 will be driven to rotate. During the rotation of wheel 19, the bubbles are broken up and formed into small bubbles. At the same time, the rotating seat 16 is rotated. The bubbles generated by the bubble outlet 17 on the rotating seat 16 enter the interior of the ultrafiltration membrane 1, disturbing and cleaning the adhering substances on the inner wall of the ultrafiltration membrane 1. Under the stirring of the stirring blade 20, the water inside the ultrafiltration membrane 1 rotates and flows. The rotating water will generate shear force on the inner wall of the ultrafiltration membrane 1. Combined with the bubble disturbance and cleaning, the cleaning ability is enhanced, which is conducive to the thorough cleaning of the substances adhering to the inner wall of the ultrafiltration membrane 1.

[0029] The external aeration assembly includes an annular shell 21, which is sleeved on the outside of the lower support pipe 2. The bottom of the annular shell 21 is fixedly connected to a second air inlet pipe 22. An aeration plate 23 is fixedly connected to the inner wall of the annular shell 21. Micropores 24 are opened on the surface of the aeration plate 23. The top of the annular shell 21 is fixedly connected to an annular drainage chamber 25. The annular drainage chamber 25 includes a swirling cavity 26. The inner diameter of the swirling cavity 26 decreases from bottom to top. A spiral drainage plate 27 is fixedly connected inside the swirling cavity 26. The diameter of the spiral trajectory of the spiral drainage plate 27 decreases from bottom to top. The top of the annular drainage chamber 25 is fixedly connected to a bell-shaped diffuser hood 28. It should be understood that by connecting the second air inlet pipe 22 to the external blower, the airflow enters the annular shell 21. After passing through the micropores 24 of the aeration bag, bubbles are formed. The bubbles pass through the swirling chamber 26 and enter the bell-shaped diffuser 28, finally moving to the surface of the ultrafiltration membrane 1. Through the action of the swirling chamber 26, the airflow drives the water in the swirling chamber 26 to flow, and the water in the swirling chamber 26 will swirl. After the swirling water diffuses out through the bell-shaped diffuser 28, it forms a swirling flow around the ultrafiltration membrane 1. The external aeration swirling flow breaks the filter cake layer on the surface of the ultrafiltration membrane 1 and guides the bubbles to the vicinity of the filter membrane. This is beneficial to promoting the disturbance of the surface of the ultrafiltration membrane 1 by the bubbles and further improving the ability to break the filter cake layer on the surface of the ultrafiltration membrane 1. By setting the bell-shaped diffuser, the airflow flowing out from the swirling chamber 26 is guided, the rising path of the bubbles is optimized, and a spiral rising flow field is formed around the ultrafiltration membrane 1.

[0030] The specific working principle is as follows: The ultrafiltration membrane 1 is installed by connecting the connecting cover 5 to the upper support tube 3 by thread, so that the top of the ultrafiltration membrane 1 is covered and the effluent is drained. The filtration process involves immersing the ultrafiltration membrane 1 in wastewater and then pumping the water outlet pipe 6 through a water pump. This creates a negative pressure inside the ultrafiltration membrane 1 within the docking cover 5. Under the combined action of water pressure and the negative pressure from the pump, the wastewater passes through the ultrafiltration membrane 1. After being filtered by the ultrafiltration membrane 1, the wastewater enters the interior of the ultrafiltration membrane 1 and is then discharged through the water outlet pipe 6, thus achieving filtration. The external aeration process involves connecting the second air inlet pipe 22 to an external blower. Airflow enters the annular shell 21 and forms bubbles after passing through the micropores 24 of the aeration plate 23. These bubbles then pass through the swirling chamber 26 and enter the bell-shaped diffuser 28, eventually moving to the surface of the ultrafiltration membrane 1. The airflow from the swirling chamber 26 causes the water inside to flow, resulting in a swirling motion. This swirling water diffuses out through the bell-shaped diffuser 28, creating a swirling motion around the ultrafiltration membrane 1. This external aeration swirling motion breaks down the filter cake layer on the surface of the ultrafiltration membrane 1 and guides the bubbles towards the vicinity of the membrane, which helps to promote the disturbance of the ultrafiltration membrane 1 surface by the bubbles and further improves the ability to break down the filter cake layer on the surface of the ultrafiltration membrane 1. The internal aeration process involves introducing gas into the first air inlet pipe 12, which can be connected to an external blower for gas supply. As the gas rapidly passes through the mixing chamber 1101, a negative pressure is generated within the mixing chamber 1101. Water around the aeration head 11 enters the mixing chamber 1101 through the water suction pipe 13 and the one-way valve 14. The water in the mixing chamber 1101 mixes with the gas, and under the compression of the throat chamber 1102, the gas-water mixture accelerates its flow and is then rapidly discharged through the diffusion chamber 1103. The generated bubbles enter the ultrafiltration membrane 1, disturbing and cleaning the adhesive on the inner wall of the ultrafiltration membrane 1.

[0031] like Figure 1 , Figure 2 and Figure 11As shown, in one embodiment, multiple ultrafiltration membranes 1 are divided into three groups, with five ultrafiltration membranes 1 in each group. An upper support plate 29 is fixedly connected to the surface of the water outlet pipe 6 at the top of the five ultrafiltration membranes 1 in the same group. A lower support plate 30 is provided at the bottom of multiple docking seats 10. Multiple support grooves 31 are opened at the top of the lower support plate 30. The docking seats 10 are placed in the support grooves 31. The first air inlet pipe 12 passes through the support grooves 31 and extends to the bottom of the lower support plate 30. Multiple annular shells 21 are fixedly installed at the top of the lower support plate 30. A second air inlet pipe 22 passes through the lower support plate 30 and extends to the bottom of the lower support plate 30. Three support rods 32 are fixedly connected to both sides of the lower support plate 30. The two ends of the three upper support plates 29 are slidably inserted into the support rods 32 respectively. A threaded surface 3201 is opened at the top of the surface of the support rod 32. A pressing nut 33 is threadedly connected to the surface of the threaded surface 3201. The pressing nut 33 contacts the top surface of the upper support plate 29. It should be understood that during the installation of the ultrafiltration membrane 1, the upper support tube 3 is threadedly connected to the docking cover 5, thereby allowing the ultrafiltration membrane 1 to be hung on the bottom end of the upper support plate 29. Then, the lower support tube 2 at the bottom end of the ultrafiltration membrane 1 is inserted into the inner annular space of the annular shell 21 and abuts against the docking seat 10 in the support groove 31. A sealing ring can be set on the top surface of the docking seat 10 to seal the contact position between the lower support tube 2 and the docking seat 10. After the lower support tube 2 and the docking seat 10 are aligned, the aeration head 11 is sealed inside the lower support tube 2. Then, the lower pressure nut 33 is rotated, causing the lower pressure nut 33 to move on the threaded surface 3201, pressing the upper support plate 29 and making the lower support tube 2 abut against the top surface of the docking seat 10. This achieves stable installation of the ultrafiltration membrane 1 between the upper support plate 29 and the lower support plate 30, preparing for subsequent filtration work.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment, lower limiting rings 34 are fixedly sleeved on the surfaces of all six support rods 32, and the lower limiting rings 34 are located below the upper support plate 29. It should be understood that by setting the lower limiting rings 34, the upper support plate 29 is prevented from getting close to the lower support plate 30 under the action of gravity, and a certain space is maintained between the upper support plate 29 and the lower support plate 30, thus preparing the installation space for the installation of the ultrafiltration membrane 1.

[0033] like Figure 1 and Figure 11As shown, in one embodiment, the outlet pipes 6 at the top of the same group of ultrafiltration membranes 1 are fixedly connected by a first branch pipe 35. The ends of the three first branch pipes 35 are connected to a manifold 36. The first air inlet pipes 12 at the bottom of the same group of ultrafiltration membranes 1 are connected by a second branch pipe 37. A first solenoid valve 38 is fixedly installed on the upper part of the surface of the second branch pipe 37. The second air inlet pipes 22 at the bottom of the same group of ultrafiltration membranes 1 are connected by a third branch pipe 39. A second solenoid valve 40 is fixedly installed on the upper part of the surface of the third branch pipe 39. The top of the third branch pipe 39 and the second branch pipe 37 are connected to an air injection pipe 41. It should be understood that when ventilation is required, the external blower is connected to the air injection pipe 41, and the airflow will enter the second air intake pipe 22 and the first air intake pipe 12 through the splitting of the third split pipe 39 and the second split pipe 37 to provide gas. And through the control of the first solenoid valve 38 and the second solenoid valve 40, when internal aeration is required, the first solenoid valve 38 is opened and the second solenoid valve 40 is closed, and when external aeration is required, the second solenoid valve 40 is closed, and reasonable control is performed as needed. During the filtration process, the external water pump is connected to the manifold 36. Under the action of the pump suction and water pressure, the wastewater will be filtered through the ultrafiltration membrane 1 and discharged through the outlet pipe 6. It will then flow into the manifold 36 through the first branch pipe 35 and be sucked away by the water pump through the manifold 36, thus realizing the collection of the cleaned water.

[0034] like Figure 1 As shown, in one embodiment, a lower support base 42 is fixedly installed at the bottom of the lower support plate 30, and an upper hanging seat 43 is fixedly connected to the top of the six support rods 32. By setting the lower support base 42, the second diversion pipe 37 and the third diversion pipe 39 are shielded at the bottom of the lower support plate 30, and the entire ultrafiltration membrane module is supported. By setting the upper hanging seat 43, it is convenient for the staff to hoist the entire ultrafiltration membrane module and move the ultrafiltration membrane module into the wastewater.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A submerged ultrafiltration membrane module for wastewater treatment, comprising a plurality of ultrafiltration membranes (1), each of the plurality of ultrafiltration membranes (1) having a drainage component at its top end, and a lower support pipe (2) fixedly connected to the bottom end of each ultrafiltration membrane (1), characterized in that, It also includes an internal aeration component and an external aeration component. The internal aeration component is set at the bottom end of the lower support tube (2) and is used to aerate the inside of the ultrafiltration membrane (1). During the aeration process, it agitates the water inside the ultrafiltration membrane (1). The external aeration component is sleeved on the outside of the lower support tube (2). The external aeration component is used to aerate the area around the ultrafiltration membrane (1). During the aeration process, it drives the water around the ultrafiltration membrane (1) to generate a swirling flow, which entrains the air bubbles near the surface of the ultrafiltration membrane (1).

2. The submerged ultrafiltration membrane module for wastewater treatment according to claim 1, characterized in that: The drainage assembly includes an upper support pipe (3), an upper mounting ring (4) is fixedly connected inside the upper support pipe (3), the bottom end of the upper mounting ring (4) is fixedly connected to the top end of the ultrafiltration membrane (1), and a docking cover (5) is threadedly connected to the top end of the upper support pipe (3), and a water outlet pipe (6) is fixedly connected to the top end of the docking cover (5).

3. A submerged ultrafiltration membrane module for wastewater treatment according to claim 1 or 2, characterized in that: The ultrafiltration membrane (1) is annular, and a lower mounting ring (7) is fixedly connected to the bottom end of the ultrafiltration membrane (1). The lower mounting ring (7) is fixedly connected to the inner wall of the lower support tube (2).

4. The submerged ultrafiltration membrane module for wastewater treatment according to claim 3, characterized in that: The internal aeration assembly includes a docking seat (10), which is located at the bottom end of the lower support pipe (2). An aeration head (11) is fixedly inserted into the top of the docking seat (10). The aeration head (11) is located inside the lower support pipe (2). The bottom end of the aeration head (11) is fixedly connected to a first air inlet pipe (12). The aeration head (11) includes a mixing chamber (1101), a throat chamber (1102), and a diffusion chamber (1103). A water suction pipe (13) is fixedly connected to the inner wall of the mixing chamber (1101). A one-way valve (14) is installed inside the water suction pipe (13).

5. The submerged ultrafiltration membrane module for wastewater treatment according to claim 4, characterized in that: A ring body (15) is fixedly connected to the inner wall of the lower mounting ring (7). A rotating seat (16) is slidably connected to the surface of the ring body (15). Multiple bubble outlets (17) are arranged in a ring array at the top of the rotating seat (16). A support shaft (18) is fixedly connected to the bottom of the rotating seat (16). An impeller (19) is fixedly sleeved on the surface of the support shaft (18). The impeller (19) is located in the diffusion chamber (1103). An agitator (20) is fixedly connected to the top of the rotating seat (16).

6. The submerged ultrafiltration membrane module for wastewater treatment according to claim 4, characterized in that: The external aeration assembly includes an annular shell (21), which is fitted outside the lower support pipe (2). The bottom of the annular shell (21) is fixedly connected to a second air inlet pipe (22). An aeration plate (23) is fixedly connected to the inner wall of the annular shell (21). Micropores (24) are opened on the surface of the aeration plate (23). The top of the annular shell (21) is fixedly connected to an annular drainage chamber (25). The annular drainage chamber (25) includes a swirling cavity (26). The inner diameter of the swirling cavity (26) decreases from bottom to top. A spiral drainage plate (27) is fixedly connected inside the swirling cavity (26). The diameter of the spiral trajectory of the spiral drainage plate (27) decreases from bottom to top. A bell-shaped diffuser (28) is fixedly connected to the top of the annular drainage chamber (25).

7. The submerged ultrafiltration membrane module for wastewater treatment according to claim 6, characterized in that: The multiple ultrafiltration membranes (1) are divided into three groups, with five ultrafiltration membranes (1) in each group. An upper support plate (29) is fixedly connected to the surface of the water outlet pipe (6) at the top of the five ultrafiltration membranes (1) in the same group. A lower support plate (30) is provided at the bottom of the multiple docking seats (10). Multiple support grooves (31) are opened on the top of the lower support plate (30). The docking seats (10) are set in the support grooves (31), and the first air inlet pipe (12) extends to the bottom of the lower support plate (30) after passing through the support grooves (31). Multiple annular shells (21) are fixedly installed. The second air intake pipe (22) is installed on the top of the lower support plate (30) and extends through the lower support plate (30) to the bottom end of the lower support plate (30). Three support rods (32) are fixedly connected to both sides of the lower support plate (30). The two ends of the three upper support plates (29) are slidably inserted into the support rods (32). The top of the surface of the support rod (32) is provided with a threaded surface (3201). A pressing nut (33) is threaded on the surface of the threaded surface (3201). The pressing nut (33) contacts the top surface of the upper support plate (29).

8. The submerged ultrafiltration membrane module for wastewater treatment according to claim 7, characterized in that: Each of the six support rods (32) has a lower limiting ring (34) fixedly sleeved on its surface, and the lower limiting ring (34) is located below the upper support plate (29).

9. A submerged ultrafiltration membrane module for wastewater treatment according to claim 7, characterized in that: The outlet pipes (6) at the top of the ultrafiltration membrane (1) in the same group are fixedly connected by the first branch pipe (35). The ends of the three first branch pipes (35) are connected by a manifold (36). The first air inlet pipes (12) at the bottom of the ultrafiltration membrane (1) in the same group are connected by a second branch pipe (37). A first solenoid valve (38) is fixedly installed on the upper part of the surface of the second branch pipe (37). The second air inlet pipes (22) at the bottom of the ultrafiltration membrane (1) in the same group are connected by a third branch pipe (39). A second solenoid valve (40) is fixedly installed on the upper part of the surface of the third branch pipe (39). The top of the third branch pipe (39) and the second branch pipe (37) are connected by an air injection pipe (41).

10. A submerged ultrafiltration membrane module for wastewater treatment according to claim 9, characterized in that: The bottom of the lower support plate (30) is fixedly installed with a lower support seat (42), and the top of the six support rods (32) is fixedly connected with an upper hanging seat (43).

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