Efficient seamless chimeric recycling hollow fiber membrane module for sewage treatment

Abstract

The utility model discloses sewage treatment efficient seamless inlaying circulation reuse hollow fiber membrane group relates to sewage treatment technical field, including shell and hollow fiber membrane spare, the inside both ends of shell are provided with resin sealing cover no. 1 and resin sealing cover no. 2, and the inside below of shell is provided with support seat, the inside of shell is provided with hollow fiber membrane spare, and the inside of shell is separated with filter cavity, gas cavity and collection cavity through resin sealing cover no. 1 and resin sealing cover no. 2, the top of gas cavity is provided with center water distribution pipe and air inlet pipe, and the surface of center water distribution pipe is provided with water outlet hole. That sewage treatment efficient seamless inlaying circulation reuse hollow fiber membrane group, hollow fiber membrane spare both ends are inlaid in resin sealing cover no. 1 and resin sealing cover no. 2 through epoxy resin seamlessly, and there is no gap at the inlaying, avoid sewage short circuit filtration problem from the source, match 0.15 0.2mm precision filtration pore size, ensure that the filtration precision is stable controllable, and the efficiency of intercepting impurities in sewage is improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a high-efficiency, seamlessly integrated, reusable hollow fiber membrane module for wastewater treatment. Background Technology

[0002] Hollow fiber membrane modules for wastewater treatment are core components of advanced wastewater treatment, widely used in the purification of domestic sewage and industrial wastewater, as well as for the reuse of reclaimed water. They typically consist of a membrane module shell, hollow fiber membrane bundles, inlet and outlet interfaces, and a sealing structure. The membrane fibers are mostly made of fouling-resistant polymer materials such as PVDF and PP.

[0003] Existing hollow fiber membrane modules have shortcomings in wastewater treatment. Gaps can easily appear at the connection between the membrane and the sealing cap, leading to short-circuit filtration of wastewater and making it difficult to maintain a stable pore size of ≤0.2mm.

[0004] Therefore, in view of this, we studied and improved the existing structure and its shortcomings, and proposed a high-efficiency, seamless, reusable hollow fiber membrane module for wastewater treatment. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency, seamlessly integrated, reusable hollow fiber membrane module for wastewater treatment, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency, seamless, reusable hollow fiber membrane module for wastewater treatment, comprising an outer shell and a hollow fiber membrane element. The inner ends of the outer shell are provided with a resin sealing cap one and a resin sealing cap two, and a support base is provided at the bottom of the inner shell. The hollow fiber membrane element is disposed inside the outer shell, and the outer shell is divided into a filtration chamber, an air supply chamber, and a collection chamber by the resin sealing cap one and resin sealing cap two. A central water distribution pipe and an air inlet pipe are provided above the air supply chamber, and a water outlet is opened on the surface of the central water distribution pipe. A pressure regulating valve is connected to one side of the air inlet pipe, and a variable frequency micro air pump is connected to one side of the pressure regulating valve. A diversion plate is installed inside the collection chamber, and a low-pressure drain pipe and a backwash water replenishment interface are provided below the collection chamber. A high-pressure water supply pipe and an automatic sewage discharge pipe are provided on the outside of the outer shell corresponding to the position of the filtration chamber, and an electric valve is installed on one side of the automatic sewage discharge pipe.

[0007] Furthermore, the hollow fiber membrane is composed of modified PVDF membrane fibers, with a 4-5μm nano-TiO2 anti-fouling coating on the surface of the membrane fibers, and a filter pore size of 0.15-0.2mm.

[0008] Furthermore, the two ends of the hollow fiber membrane are seamlessly embedded in resin sealing cap one and resin sealing cap two with epoxy resin, the middle section of the hollow fiber membrane is located in the filter cavity, and the two ends of the hollow fiber membrane extend to the air supply cavity and the collection cavity respectively.

[0009] Furthermore, the diameter of the water outlet is 6-7mm, and the water outlets are evenly distributed on the surface of the central water distribution pipe, with the bottom of the central water distribution pipe fixedly connected to the support base.

[0010] Furthermore, the central water distribution pipe is connected to the filter chamber, and the backwash water supply interface is connected to the low-pressure drain pipe.

[0011] Furthermore, the drainage plate is inclined, and the outer shell and the drainage plate are an integrated structure.

[0012] Furthermore, the variable frequency micro air pump outputs a pressure of 0.03-0.04 MPa, and the pressure of the backwash water connected to the high-pressure water delivery pipe is 0.04-0.05 MPa.

[0013] This invention provides a high-efficiency, seamlessly integrated, reusable hollow fiber membrane module for wastewater treatment, which has the following advantages: 1. The hollow fiber membrane of this utility model is seamlessly embedded at both ends with epoxy resin to resin sealing cap one and resin sealing cap two, with no gaps at the joint, avoiding the problem of short-circuit filtration of sewage from the source. With a precise filter pore size of 0.15-0.2mm, the filtration accuracy is stable and controllable, and the efficiency of intercepting impurities in sewage is significantly improved. The backwashing process adopts a dual air-water backwashing design, with 0.03-0.04MPa high-pressure gas and 0.04-0.05MPa backwash water working together. Combined with a 4-5μm nano TiO2 antifouling coating on the membrane fiber surface, it can remove stubborn pollutants through high-frequency micro-vibration of gas and rinse the membrane surface with backwash water. The pollutant removal rate exceeds 90%, and the acid washing cycle is extended to ≥15 days.

[0014] 2. The lower support base inside the outer shell of this utility model is fixedly connected to the central water distribution pipe, which improves the installation stability of the water distribution pipe and avoids shaking during operation that affects water distribution. The central water distribution pipe has 6-7mm uniform water outlet holes on its surface, which allows sewage to flow smoothly into the filter chamber. Combined with the optimized layout above the air supply chamber, the sewage and membrane components are in more uniform contact, reducing local blockage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance structure of the efficient, seamless, reusable hollow fiber membrane module for wastewater treatment of this utility model. Figure 2 This is a schematic cross-sectional view of the outer shell of the high-efficiency seamlessly integrated reusable hollow fiber membrane module for wastewater treatment according to this utility model. Figure 3This is a three-dimensional structural diagram of the central water distribution pipe of the efficient, seamless, reusable hollow fiber membrane module for wastewater treatment according to this utility model.

[0016] In the diagram: 1. Outer shell; 2. Resin sealing cap one; 3. Resin sealing cap two; 4. Filter chamber; 5. Hollow fiber membrane; 6. Air supply chamber; 7. Central water distribution pipe; 8. Water outlet; 9. Support base; 10. Collection chamber; 11. Drain plate; 12. Low-pressure drain pipe; 13. Backwash water supply interface; 14. High-pressure water supply pipe; 15. Automatic sewage discharge pipe; 16. Electric valve; 17. Air inlet pipe; 18. Pressure regulating valve; 19. Variable frequency micro air pump. Detailed Implementation

[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0018] like Figure 1 and Figure 2 As shown, a high-efficiency, seamless, reusable hollow fiber membrane module for wastewater treatment includes an outer shell 1 and a hollow fiber membrane element 5. Resin sealing cap 1 (2) and resin sealing cap 2 (3) are located at both ends inside the outer shell 1. The hollow fiber membrane element 5 is disposed inside the outer shell 1. The outer shell 1 is divided into a filter chamber 4, an air supply chamber 6, and a collection chamber 10 by the resin sealing caps 1 (2) and 2 (3). A pressure regulating valve 18 is connected to one side of the air inlet pipe 17, and a variable frequency micro air pump 19 is connected to one side of the pressure regulating valve 18. A diversion plate 11 is installed inside the collection chamber 10, and a low-pressure drain pipe 12 and a backwash water supply interface 13 are located below the collection chamber 10. A high-pressure water supply pipe 14 and an automatic sewage discharge pipe 15 are located on the outside of the outer shell 1, corresponding to the position of the filter chamber 4. An automatic sewage discharge pipe 15 is installed on one side of... It has an electric valve 16, and a hollow fiber membrane 5 composed of modified PVDF membrane fibers with a 4-5μm nano-TiO2 antifouling coating on the surface of the membrane fibers. The filtration pore size is 0.15-0.2mm. The two ends of the hollow fiber membrane 5 are seamlessly embedded in the resin sealing cap 1 2 and resin sealing cap 2 3 with epoxy resin. The middle section of the hollow fiber membrane 5 is located in the filter chamber 4, and the two ends of the hollow fiber membrane 5 extend to the air supply chamber 6 and the collection chamber 10, respectively. The central water distribution pipe 7 is connected to the filter chamber 4, and the backwash water supply interface 13 is connected to the low-pressure drain pipe 12. The diversion plate 11 is set at an angle, and the outer shell 1 and the diversion plate 11 are integrated. The variable frequency micro air pump 19 outputs a pressure of 0.03-0.04MPa, and the pressure of the backwash water connected to the high-pressure water supply pipe 14 is 0.04-0.05MPa.

[0019] The specific operation is as follows: the two ends of the hollow fiber membrane 5 are seamlessly embedded with resin sealing cap 1 2 and resin sealing cap 2 3 through epoxy resin. There are no gaps at the joint, which avoids the problem of short-circuit filtration of sewage from the source. With a precise filter pore size of 0.15-0.2mm, the filtration accuracy is stable and controllable, and the efficiency of intercepting impurities in sewage is significantly improved. The backwashing process adopts a dual air and water backwashing design. The high-pressure gas of 0.03-0.04MPa and the backwash water of 0.04-0.05MPa work together. With the 4-5μm nano TiO2 antifouling coating on the surface of the membrane fiber, it can remove stubborn pollutants through high-frequency micro-vibration of gas and rinse the membrane surface with backwash water. The pollutant removal rate exceeds 90%, and the acid washing cycle is extended to ≥15 days.

[0020] like Figure 2 and Figure 3 As shown, a support base 9 is provided at the bottom of the interior of the outer shell 1, a central water distribution pipe 7 and an air inlet pipe 17 are provided above the air supply chamber 6, and water outlet holes 8 are opened on the surface of the central water distribution pipe 7. The diameter of the water outlet holes 8 is 6-7mm, and the water outlet holes 8 are evenly distributed on the surface of the central water distribution pipe 7. The bottom of the central water distribution pipe 7 is fixedly connected to the support base 9.

[0021] The specific operation is as follows: the lower support base 9 inside the outer shell 1 is fixedly connected to the central water distribution pipe 7 to improve the installation stability of the water distribution pipe and avoid shaking during operation, which affects water distribution. The surface of the central water distribution pipe 7 has 6-7mm uniform water outlet holes 8, which allow sewage to flow smoothly into the filter chamber 4. Combined with the optimized layout above the air supply chamber 6, the sewage and membrane components are in more uniform contact, reducing local blockage.

[0022] In summary, this wastewater treatment system features a highly efficient, seamlessly integrated, reusable hollow fiber membrane module. During operation, wastewater is initially introduced through the central distribution pipe 7 and flows smoothly into the filter chamber 4 through the evenly distributed outlet holes 8 on its surface. Driven by an operating pressure of ≤0.05MPa, the wastewater fully contacts the hollow fiber membrane 5 within the filter chamber 4. The hollow fiber membrane 5 is composed of modified PVDF membrane fibers, and its surface is coated with a 4-5μm nano-TiO2 antifouling coating to reduce pollutant adhesion. The precise filtration pore size of 0.15-0.2mm effectively traps impurities in the wastewater. Clean water permeates through the membrane fibers into the inner chamber. The permeate entering the inner chamber of the membrane module converges into the collection chamber 10. After being de-turbulent by the inclined diversion plate 11 inside the chamber, it is stably discharged through the low-pressure drain pipe 12 below the collection chamber 10. During backwashing, the valve of the water inlet passage is closed, and the backwash water is delivered to the inner cavity of the hollow fiber membrane 5 through the backwash water replenishment interface 13 connected to the low-pressure drain pipe 12. At the same time, the variable frequency micro air pump 19 (output pressure 0.03-0.04MPa) on one side of the air inlet pipe 17 is regulated by the pressure regulating valve 18 and high-pressure gas is input into the air delivery chamber 6 to form a double backwash of air and water. The high-pressure water supply pipe 14, located on the outside of the outer shell 1 corresponding to the position of the filter chamber 4, is connected to 0.04-0.05MPa backwash water to flush the outer surface of the hollow fiber membrane 5. The detached dirt is discharged through the automatic drain pipe 15 equipped with an electric valve 16. Through the synergistic effect of the nano antifouling coating and efficient backwashing, the acid washing cycle of the membrane module is extended, ultimately achieving efficient and stable operation of deep wastewater treatment and recycling.

[0023] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high-efficiency, seamless, reusable hollow fiber membrane module for wastewater treatment, comprising a shell (1) and a hollow fiber membrane element (5), characterized in that, The inner ends of the outer shell (1) are provided with resin sealing cap one (2) and resin sealing cap two (3), and a support base (9) is provided at the bottom of the inner shell (1). The hollow fiber membrane (5) is located inside the outer shell (1), and the outer shell (1) is divided into a filter chamber (4), an air supply chamber (6) and a collection chamber (10) by the resin sealing cap one (2) and resin sealing cap two (3). The air supply chamber (6) is provided with a central water distribution pipe (7) and an air inlet pipe (17) above it, and the surface of the central water distribution pipe (7) is provided with a water outlet hole. (8) A pressure regulating valve (18) is connected to one side of the air inlet pipe (17), and a variable frequency micro air pump (19) is connected to one side of the pressure regulating valve (18). A diversion plate (11) is installed inside the collection chamber (10), and a low pressure drain pipe (12) and a backwash water replenishment interface (13) are provided below the collection chamber (10). A high pressure water supply pipe (14) and an automatic sewage pipe (15) are provided on the outside of the outer shell (1) corresponding to the position of the filter chamber (4). An electric valve (16) is installed on one side of the automatic sewage pipe (15).

2. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The hollow fiber membrane (5) is composed of modified PVDF membrane fibers, with a 4-5μm nano-TiO2 anti-fouling coating on the surface of the membrane fibers and a filtration pore size of 0.15-0.2mm.

3. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The hollow fiber membrane (5) is seamlessly fitted at both ends into the resin sealing cap one (2) and the resin sealing cap two (3) by epoxy resin. The middle section of the hollow fiber membrane (5) is located in the filter chamber (4). The two ends of the hollow fiber membrane (5) extend to the air supply chamber (6) and the collection chamber (10) respectively.

4. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The diameter of the water outlet (8) is 6-7mm, and the water outlet (8) is evenly distributed on the surface of the central water distribution pipe (7). The bottom of the central water distribution pipe (7) is fixedly connected to the support base (9).

5. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The central water distribution pipe (7) is connected to the filter chamber (4), and the backwash water supply interface (13) is connected to the low-pressure drain pipe (12).

6. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The diversion plate (11) is inclined, and the outer shell (1) and the diversion plate (11) are integrated.

7. The high-efficiency seamless interlocking reusable hollow fiber membrane module for wastewater treatment according to claim 1, characterized in that, The variable frequency micro air pump (19) outputs a pressure of 0.03-0.04 MPa, and the pressure of the backwash water connected to the high pressure water pipe (14) is 0.04-0.05 MPa.

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