A wastewater membrane filtration device

Abstract

The utility model discloses a wastewater membrane filter device, its characterized in that, including box, inlet pipe, outlet pipe and membrane filter water subassembly, the box includes the cavity, and the membrane filter water subassembly is installed in the cavity, and the membrane filter water subassembly includes lower disc body, upper disc body and a plurality of hollow filter fibers, and the upper disc body is installed in the upper end of cavity, and the lower disc body is located the downside of upper disc body, and the upper end part of hollow filter fiber is connected in the upper disc body, and the lower end part of hollow filter fiber is connected in the lower disc body, the box bottom is connected with inlet pipe, and inlet pipe is used for leading wastewater into the box, and the outlet pipe part is located the inside of cavity, and the upper end of outlet pipe is connected with the inner chamber of upper disc body, and the lower end of outlet pipe passes through the lower disc body, and extends to the outside of box, the utility model discloses have efficient filtration, the effect that the sealing property is strong, and the anti -pollution performance is superior.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and more specifically, to a wastewater membrane filtration device. Background Technology

[0002] Industrial wastewater typically contains high concentrations of suspended solids and toxic substances. Its treatment process usually encompasses multiple core steps, including physical separation, chemical treatment, and biodegradation, with the ultimate goal of ensuring that the effluent meets national discharge standards or achieves in-plant recycling. In the entire treatment process, filtration and separation, as a key pretreatment step, effectively removes most suspended solids and some colloidal pollutants, laying the foundation for subsequent advanced treatment.

[0003] Hollow fiber membrane modules typically achieve filtration using negative pressure suction. However, during operation, these modules are usually submerged in water, resulting in poor flow near the surface. This leads to contaminant accumulation near the membrane surface, and prolonged submersion can cause contaminants to adhere to the membrane material, leading to membrane clogging and reduced filtration efficiency. Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wastewater membrane filtration device that has the effects of high-efficiency filtration, strong sealing, and excellent anti-pollution performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a wastewater membrane filtration device, comprising a housing, an inlet pipe, an outlet pipe, and a membrane filtration assembly. The housing includes a cavity, and the membrane filtration assembly is installed within the cavity. The membrane filtration assembly includes a lower plate, an upper plate, and a plurality of hollow filter fibers. The upper plate is installed at the upper end of the cavity, and the lower plate is located below the upper plate. The upper ends of the hollow filter fibers are connected to the upper plate, and the lower ends of the hollow filter fibers are connected to the lower plate. An inlet pipe is connected to the bottom of the housing for introducing wastewater into the housing. The outlet pipe is located inside the cavity, with its upper end connected to the inner cavity of the upper plate and its lower end passing through the lower plate and extending to the outside of the housing.

[0006] By adopting the above scheme, the membrane filtration assembly is integrated into the housing cavity, with hollow filter fibers fixed by upper and lower discs to form a stable filtration unit. Combined with the bottom inlet pipe and the outlet pipe penetrating the discs, a compact and rationally designed filtration system is constructed. This design not only achieves a highly efficient bottom-to-top filtration path for wastewater, facilitating impurity separation and collection, but also features an overall modular structure that is easy to install and maintain, a large filtration area, and a unique outlet pipe layout that ensures smooth filtrate discharge, enhancing the stability and practicality of the device.

[0007] The present invention is further configured such that the lower disc body and the upper disc body are vertically corresponding and arranged in parallel, and the hollow filter fiber is oriented vertically; the upper disc body is provided with an upper interface, and the lower disc body is provided with a lower interface; the upper and lower ends of the hollow filter fiber are respectively connected to the upper interface and the lower interface.

[0008] By adopting the above scheme, the lower and upper discs are arranged in parallel and corresponding order, ensuring that the hollow filter fibers are vertically oriented and reliably connected at both ends to the interfaces on the discs, thus constructing a well-structured and uniformly distributed filter unit. This design not only effectively increases the effective filtration area per unit volume and improves filtration efficiency, but also ensures that each fiber is subjected to uniform stress and that the fluid flows through a consistent path.

[0009] The present invention is further configured such that the interface between the water inlet pipe and the tank is located directly below the lower plate, and the wastewater input through the water inlet pipe can impact the lower plate upwards.

[0010] By adopting the above solution, the water inlet pipe interface is located directly below the lower plate, allowing the incoming water flow to directly impact the lower plate from bottom to top. This flow direction design utilizes the impact force of the water flow to naturally lift and press down the plate, causing the hollow filter fibers to produce periodic tension and relaxation movements, effectively shaking off attached pollutants and significantly alleviating membrane pore clogging.

[0011] The present invention is further configured such that a stop block is provided on the inner wall of the box near the upper plate, the stop block is located below the upper plate, the periphery of the upper plate abuts against the stop block, a box cover is detachably installed on the upper part of the box, and the convex ring of the box cover presses the upper periphery of the upper plate tightly, and the upper plate is detachably fixed.

[0012] By adopting the above solution, a stop block is installed on the inner wall of the chamber, which cooperates with the convex ring at the bottom of the detachable chamber cover to form a clamping and fixing structure for the upper plate. This design not only achieves reliable positioning and fastening of the upper plate, effectively preventing displacement or vibration during operation, but also greatly facilitates the daily maintenance, cleaning, or replacement of the membrane module due to its detachable installation method.

[0013] The present invention is further configured such that the interior of the lower plate and the upper plate is configured as a hollow water guiding cavity for collecting filtered wastewater.

[0014] By adopting the above scheme, the interiors of the lower and upper discs are designed as hollow water-guiding cavities, effectively constructing a collection and guiding channel for filtered wastewater. This structure can quickly collect the purified water seeping from each hollow filter fiber and achieve its smooth transport and unified discharge within the system.

[0015] The present invention is further configured such that the hollow filter fiber is an MBR hollow fiber membrane.

[0016] By adopting the above scheme and using hollow fiber membranes in MBR as the core filtration medium, the outstanding advantages of its large specific surface area, high filtration accuracy, and strong anti-fouling ability are fully utilized. This choice enhances the device's ability to efficiently retain pollutants such as suspended solids, colloids, and microorganisms, ensuring that the effluent water quality consistently meets standards.

[0017] The present invention is further configured such that the upper plate body has a hollow water guiding cavity, the upper and lower sides of the upper plate body are respectively an upper side wall and a lower side wall, the lower side wall has a lower connecting hole, the upper end of the water outlet pipe passes through the lower connecting hole and communicates with the water guiding cavity, and the lower connecting hole and the water outlet pipe are sealed by a lower sealing element.

[0018] By adopting the above scheme, a hollow water guiding cavity is set in the upper plate, and a lower connecting hole is opened on its lower side wall, allowing the water outlet pipe to pass directly through and communicate with the water guiding cavity. At the same time, a lower sealing element is set between the lower connecting hole and the water outlet pipe. This structure realizes the collection and discharge of filtered water in the plate, effectively shortening the water flow path and reducing resistance; the setting of the lower sealing element ensures a reliable seal at the connection, preventing unfiltered wastewater from leaking out, thus improving filtration efficiency while ensuring the purity of the effluent water and the stability of system operation.

[0019] The present invention is further configured such that a second convex ring is integrally connected to the outer circumference of the upper end of the water outlet pipe, the second convex ring is located on the lower side of the lower side wall, and the lower sealing member seals against the lower connecting hole by sealing between the second convex ring and the lower side wall.

[0020] By adopting the above scheme, a second convex ring is integrally installed on the outer circumference of the upper end of the outlet pipe, positioned below the lower side wall of the upper plate, and working together with the lower sealing element to form a sealing structure. The clamping seal between the second convex ring and the lower side wall achieves a reliable static seal on the lower connecting hole, effectively preventing unfiltered wastewater from seeping into the water guiding cavity and ensuring the purity of the effluent.

[0021] The present invention is further configured to include a bolt and a threaded sleeve. The threaded sleeve is located at the upper end of the water outlet pipe. The threaded sleeve is fixedly connected to the water outlet pipe by a bracket. An upper connecting hole is provided on the upper side wall. The upper connecting hole is directly opposite the threaded sleeve. The bolt extends into the water guide cavity from the upper connecting hole and is threadedly connected to the threaded sleeve. A threaded head is integrally connected to the upper end of the bolt. The threaded head is sealed to the upper side wall by an upper sealing element.

[0022] By adopting the above solution, a reliable connection between the outlet pipe and the upper plate's water guide cavity is achieved through the threaded fastening of bolts and threaded sleeves, combined with the threaded sleeve structure fixed by the bracket. An upper sealing element is installed between the bolt head and the upper sidewall, which simultaneously compresses and seals the connection when the bolt is tightened, creating a double sealing effect. This structure not only ensures the mechanical strength and stability of the pipeline connection but also effectively prevents filtrate leakage and external contamination, improving the sealing performance and long-term operational reliability of the device.

[0023] The present invention is further configured such that the upper seal and the lower seal are made of rubber material.

[0024] By adopting the above solution, the high elasticity and deformation capacity of rubber are fully utilized, enabling a tight fit to be formed under bolt tightening force and pipeline pressure, thus achieving effective sealing of the connection interface. This material not only provides reliable sealing performance and can withstand certain vibrations and pressure fluctuations, but also possesses excellent corrosion resistance, ensuring the long-term stable operation of the membrane filtration device.

[0025] In summary, this utility model has the following beneficial effects:

[0026] 1. The device adopts a modular filtration assembly composed of upper and lower discs and hollow fiber membranes, which has a compact structure, is easy to install and disassemble, and has high maintenance efficiency; the upper and lower discs are equipped with water guiding chambers, which together with the water outlet pipeline form a high-efficiency water collection system, which can quickly collect and export filtrate, thereby improving filtration efficiency.

[0027] 2. The lower plate can move up and down due to the impact of the incoming water flow, so that the hollow fiber membrane can maintain appropriate tension, effectively reduce membrane pore clogging, extend service life, and enhance fluid turbulence and improve filtration uniformity.

[0028] 3. The outlet pipe and the upper plate are reliably connected and sealed by a bolt-sleeve structure and double sealing rings, which not only ensures the stability of the overall structure, but also prevents the leakage of unfiltered wastewater and ensures the quality of the outlet water. Attached Figure Description

[0029] Figure 1 This is a perspective view of a wastewater membrane filtration device in this embodiment;

[0030] Figure 2 This is a cross-sectional view of a wastewater membrane filtration device in this embodiment;

[0031] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0032] Figure 4 This is a schematic diagram showing that the upper plate is detachable;

[0033] Figure 5This is a cross-sectional view of the upper end of the water outlet pipe.

[0034] Reference numerals: Box body 1; Cavity 101; Box cover 102; First convex ring 103; Water inlet pipe 2; Water outlet pipe 3; Second convex ring 31; Support 32; Lower plate 41; Lower interface 411; Upper plate 42; Upper interface 421; Water guide cavity 422; Upper side wall 4221; Lower side wall 4222; Upper connecting hole 423; Lower connecting hole 424; Hollow filter fiber 5; Lower end 51; Upper end 52; Bolt 6; Screw sleeve 61; Screw head 62; Upper seal 7; Lower seal 8; Stop block 9. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] This embodiment discloses a wastewater membrane filtration device, referring to... Figures 1-5 As shown, the device includes a housing 1, an inlet pipe 2, an outlet pipe 3, and a membrane filtration assembly. The housing 1 includes a cavity 101, and the membrane filtration assembly is installed inside the cavity 101. The membrane filtration assembly includes a lower plate 41, an upper plate 42, and several hollow filter fibers 5. The upper plate 42 is installed at the upper end of the cavity 101, and the lower plate 41 is located below the upper plate 42. The lower plate 41 and the upper plate 42 are vertically aligned and arranged in parallel.

[0037] Reference Figure 2 As shown, the hollow filter fiber 5 is an MBR hollow fiber membrane, arranged in a vertical direction. The upper end 52 of the hollow filter fiber 5 is connected to the upper plate 42, and the lower end 51 of the hollow filter fiber 5 is connected to the lower plate 41. The upper plate 42 is provided with an upper interface 421, and the lower plate 41 is provided with a lower interface 411. The upper and lower ends of the hollow filter fiber 5 are connected to the upper interface 421 and the lower interface 411, respectively.

[0038] By arranging the lower disc 41 and the upper disc 42 in parallel and corresponding manner, the hollow filter fibers 5 are oriented vertically, and their upper and lower ends are reliably connected to the interfaces on the discs, thus constructing a well-structured and uniformly distributed filter unit. This design not only effectively increases the effective filtration area per unit volume and improves filtration efficiency, but also ensures that each fiber is subjected to uniform stress and that the fluid flows through a consistent path, which is beneficial for extending the service life of the membrane material.

[0039] Reference Figure 3 , Figure 4As shown, the lower plate 41 and the upper plate 42 are internally configured with hollow water guiding chambers 422, which can collect filtered purified water. A baffle 9 is provided on the inner wall of the housing 1 near the upper plate 42. The baffle 9 is located below the upper plate 42, and the periphery of the upper plate 42 abuts against the baffle 9, supporting the periphery of the upper plate 42. The upper part of the housing 1 is closed by a removable housing cover 102. A protruding ring 103 at the bottom of the housing cover 102 presses against the upper periphery of the upper plate 41, thereby achieving a removable fixation of the upper plate 41.

[0040] By setting a stop 9 on the inner wall of the housing 1, and cooperating with the convex ring 103 at the lower part of the detachable housing cover 102, a clamping and fixing structure for the upper plate 42 is formed. This design not only achieves reliable positioning and fastening of the upper plate 42, effectively preventing displacement or vibration during operation, but also greatly facilitates the daily maintenance, cleaning or replacement of the membrane module due to its detachable installation method.

[0041] The upper plate 42 has a hollow water guiding cavity 422 inside. The upper and lower sides of the upper plate 42 are the upper side wall 4221 and the lower side wall 4222, respectively. The lower side wall 4222 has a lower connecting hole 424. The upper end of the water outlet pipe 3 passes through the lower connecting hole 424 and communicates with the water guiding cavity 422. The lower connecting hole and the water outlet pipe 3 are sealed by the lower sealing member 8.

[0042] The device also includes a bolt 6 and a threaded sleeve 61. The threaded sleeve 61 is fixed to the internal structure of the upper end of the water outlet pipe 3 by a bracket 32. An upper connecting hole 423 is provided on the upper side wall 4221. The upper connecting hole 423 is directly opposite the threaded sleeve 61. The bolt 6 extends into the water guide cavity 422 through the upper connecting hole 423 and is threadedly connected to the threaded sleeve 61. A threaded head 62 is integrally connected to the upper end of the bolt 6. The threaded head 62 and the upper side wall 4221 are pressed and sealed by an upper sealing element 7 to form a reliable double sealing structure.

[0043] Reference Figure 2 As shown, a water inlet pipe 2 is connected to the bottom of the housing 1, allowing wastewater to flow into the housing 1. The interface between the water inlet pipe 2 and the housing 1 is located directly below the lower plate 41, enabling the wastewater entering through the water inlet pipe 2 to impact the lower plate 41 upwards. The lower plate 41 moves up and down with the fluid generated by the inflow of wastewater, causing the hollow filter fibers 5 to periodically tension and relax. This flow design utilizes the impact force of the water flow to naturally lift and press down the plate, causing the hollow filter fibers 5 to produce periodic tension and relaxation movements, effectively shaking off attached pollutants, significantly alleviating membrane pore blockage, and simultaneously enhancing fluid turbulence and improving filtration uniformity.

[0044] The water outlet pipe 3 is located inside the cavity 101. The upper end of the water outlet pipe 3 is connected to the inner cavity of the upper plate 42. A second convex ring 31 is integrally connected to the outer circumference of the upper end of the water outlet pipe 3. The second convex ring 31 is located below the lower side wall 4222. The lower seal 8 abuts against the second convex ring 31 and the lower side wall 4222, achieving a reliable seal on the lower connecting hole 424. Both the upper seal 7 and the lower seal 8 are made of rubber, possessing good elasticity and sealing performance, and adapting to certain vibrations and pressure fluctuations. The lower end of the water outlet pipe 3 passes through the lower plate 41 and extends to the outside of the housing 1.

[0045] When the device is running, a negative pressure suction effect is applied through the outlet pipe 3, which causes the wastewater to be drawn from the inlet pipe 2 into the cavity 101. The wastewater is filtered through the hollow filter fiber 5. The filtered purified water enters the hollow structure in the hollow filter fiber 5, and then flows into the water guide cavity 422. It is then guided by the water guide cavity 422 to the outlet pipe 3, and finally discharged through the outlet pipe 3 to enter the subsequent purification process.

[0046] This device employs a modular filtration assembly consisting of upper and lower discs and a hollow fiber membrane. It features a compact structure, convenient assembly and disassembly, and high maintenance efficiency. The upper and lower discs each contain a water guiding chamber 42, which, together with the outlet pipe, forms a high-efficiency water collection system. This system quickly collects and discharges the filtrate, improving filtration efficiency. The lower disc 41 can move up and down due to the impact of the incoming water flow, maintaining appropriate tension on the hollow fiber membrane. This effectively reduces membrane pore clogging, extends service life, and enhances fluid turbulence, improving filtration uniformity and operational stability. The outlet pipe and upper disc are reliably connected and multi-sealed via a bolt 6-sleeve 61 structure and double sealing rings, further ensuring connection strength and sealing reliability. This ensures the device combines high-efficiency filtration with long-term stable operation in industrial wastewater treatment. Disassembling the outlet pipe from the upper disc allows for the assembly and disassembly of the membrane filtration assembly, which can then be removed from the top of the housing 1, facilitating subsequent maintenance.

[0047] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A wastewater membrane filtration device, characterized in that, The device includes a housing (1), an inlet pipe (2), an outlet pipe (3), and a membrane filtration assembly. The housing (1) includes a cavity (101), and the membrane filtration assembly is installed in the cavity (101). The membrane filtration assembly includes a lower plate (41), an upper plate (42), and several hollow filter fibers (5). The upper plate (42) is installed at the upper end of the cavity (101), and the lower plate (41) is located below the upper plate (42). The upper end (52) of the hollow filter fiber (5) is connected to the upper plate (42), and the lower end (51) of the hollow filter fiber (5) is connected to the lower plate (41). The bottom of the box (1) is connected to a water inlet pipe (2), which is used to introduce wastewater into the box (1); The water outlet pipe (3) is located inside the cavity (101). The upper end of the water outlet pipe (3) is connected to the inner cavity of the upper plate (42). The lower end of the water outlet pipe (3) passes through the lower plate (41) and extends to the outside of the box (1).

2. The wastewater membrane filtration device according to claim 1, characterized in that, The lower disc (41) and the upper disc (42) are arranged in parallel and correspond to each other vertically. The hollow filter fiber (5) is oriented vertically. The upper disc (42) is provided with an upper interface (421), and the lower disc (41) is provided with a lower interface (411). The upper and lower ends of the hollow filter fiber (5) are connected to the upper interface (421) and the lower interface (411) respectively.

3. The wastewater membrane filtration device according to claim 1, characterized in that, The interface between the water inlet pipe (2) and the box body (1) is located directly below the lower plate (41), and the wastewater input by the water inlet pipe (2) can impact the lower plate (41) upwards.

4. The wastewater membrane filtration device according to claim 1, characterized in that, The inner wall of the box (1) is provided with a stop block (9) on the side near the upper plate (42). The stop block (9) is located below the upper plate (42). The periphery of the upper plate (42) abuts against the stop block (9). The upper part of the box (1) is detachably installed with a box cover (102). The protruding ring (103) of the box cover (102) presses the upper periphery of the upper plate (42) tightly. The upper plate (42) is detachably fixed.

5. A wastewater membrane filtration device according to claim 2, characterized in that, The lower plate (41) and upper plate (42) are configured with hollow water guiding chambers (422) for collecting filtered wastewater.

6. A wastewater membrane filtration device according to claim 2, characterized in that, The hollow fiber filter (5) is an MBR hollow fiber membrane.

7. A wastewater membrane filtration device according to claim 1, characterized in that, The upper plate (42) is provided with a hollow water guiding cavity (422). The upper and lower sides of the upper plate (42) are an upper side wall (4221) and a lower side wall (4222), respectively. The lower side wall (4222) has a lower connecting hole (424). The upper end of the water outlet pipe (3) passes through the lower connecting hole (424) and communicates with the water guiding cavity (422). The lower connecting hole and the water outlet pipe (3) are sealed by a lower sealing element (8).

8. A wastewater membrane filtration device according to claim 7, characterized in that, The upper outer circumference of the water outlet pipe (3) is integrally connected with a second convex ring (31), the second convex ring (31) is located on the lower side of the lower side wall (4222), and the lower sealing member (8) seals the lower connecting hole (424) between the second convex ring (31) and the lower side wall (4222).

9. A wastewater membrane filtration device according to claim 1, characterized in that, It also includes a bolt (6) and a threaded sleeve (61). The threaded sleeve (61) is located at the upper end of the water outlet pipe (3). The threaded sleeve (61) and the water outlet pipe (3) are fixedly connected by a bracket (32). The upper side wall (4221) is provided with an upper connecting hole (423). The upper connecting hole (423) and the threaded sleeve (61) are directly opposite each other. The bolt (6) extends into the water guide cavity (422) from the upper connecting hole (423) and is threadedly connected to the threaded sleeve (61). The upper end of the bolt (6) is integrally connected with a screw head (62). The screw head (62) and the upper side wall (4221) are sealed by an upper sealing element (7).

10. A wastewater membrane filtration device according to claim 9, characterized in that, The upper seal (7) and lower seal (8) are made of rubber material.

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