Flange assembly and filtrate circulation system

Abstract

The application discloses a flange assembly and a filtrate circulation system, and the flange assembly comprises a lower cover, an upper cover, a connecting piece, a first valve and a second valve. The first filter core groove and the liquid outlet are formed in the lower cover, the second filter core groove, the liquid inlet and the circulation outlet are formed in the upper cover, the upper cover and the lower cover are combined and fixed through the connecting piece, the plate type filter core is fixed through cooperation of the first filter core groove and the second filter core groove, the first valve is connected with the liquid inlet, and the second valve is connected with the circulation outlet. The flow of the filtrate flowing into the flange assembly can be controlled through the first valve and the second valve, the control of the driving pressure in the membrane separation process is realized, the plate type filter core is protected, the great pressure caused by the too large flow is prevented from damaging the plate type filter core, and the service life of the plate type filter core is prolonged.

Description

Technical Field

[0001] This invention relates to the field of membrane separation technology, and in particular to a flange assembly and a filtrate circulation system. Background Technology

[0002] There are many traditional methods for preparing separation membranes, such as NIPS (Nap Precipitation Phase Inversion), TIPS (Thermal Induced Phase Separation), VIPS (Vapor Vapor Induced Phase Separation), and melt extrusion-stretching. These methods all involve almost identical processes, including a dissolution / melting process and a phase inversion. Because these methods have inherent limitations, the resulting membranes often fail to meet specific requirements in terms of pore structure, hydrophilicity / hydrophobicity, and membrane strength. In membrane separation technology, disc flange assemblies are typically used to clamp or support functional materials with separation properties (such as microporous filter membranes), ensuring that the internal porous structure of the material is not damaged under certain operating pressures, thus preserving its separation properties. Plate filter cartridges can withstand higher operating pressures and provide larger permeate flux, replacing microporous filter membranes. However, existing disc flange assemblies are often dead-end filtration devices, making it difficult to control the driving pressure during membrane separation, which can easily damage the plate filter cartridge. Furthermore, dead-end filtration is often accompanied by severe fouling, significantly impacting the lifespan of plate filter cartridges.

[0003] Therefore, existing technologies still need to be improved and enhanced. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a flange assembly and a filtrate circulation system, which aims to solve the problems in the prior art where the flange assembly is not easy to control the driving pressure, which easily causes damage to the plate filter element; and dead-end filtration is usually accompanied by severe pollution, which seriously affects the service life of the plate filter element.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, a flange assembly for loading a plate filter element, characterized in that the flange assembly comprises:

[0007] The lower cover has a first filter element groove and a liquid outlet. The first filter element groove is located at one end of the lower cover and is used to load the plate filter element. The liquid outlet extends radially through the lower cover and is connected to the first filter element groove. The liquid outlet is used to discharge filtrate.

[0008] The upper cover abuts against one end of the lower cover and is located on one side of the first filter element groove. The upper cover has a second filter element groove, an inlet, and a circulation outlet. The second filter element groove is located at the end of the upper cover facing the lower cover and cooperates with the first filter element groove. The inlet and the circulation outlet radially penetrate the upper cover and are connected to the second filter element groove. The inlet is used to input filtrate, and the circulation outlet is used to discharge circulating filtrate.

[0009] A plurality of connectors are peripherally disposed through the upper cover and the lower cover, the connectors being used to fasten the upper cover and the lower cover;

[0010] A first valve is detachably connected to one end of the liquid inlet on the upper cover;

[0011] The second valve is detachably connected to one side of the circulation outlet on the upper cover.

[0012] As a further improved technical solution, the flange assembly also includes a gasket, which is disposed inside the first filter element groove and is used to support the plate filter element.

[0013] As a further improved technical solution, the lower cover is also provided with a boss, which is located inside the first filter element groove and abuts against the outside of the gasket.

[0014] As a further improved technical solution, the boss is a crescent-shaped boss.

[0015] As a further improved technical solution, the lower cover and the upper cover are provided with a plurality of screw holes, which are arranged around the lower cover and the upper cover and are engaged with the connector.

[0016] As a further improved technical solution, a groove is provided at one end of the upper cover facing the lower cover.

[0017] As a further improvement, the flange assembly also includes a sealing ring that abuts against the interior of the groove.

[0018] As a further improvement, the sealing ring is a rubber sealing ring.

[0019] As a further improved technical solution, a pressure gauge is provided at the end of the second valve away from the upper cover, and the pressure gauge is used to measure and display the pressure of the filtrate inside the second valve.

[0020] Secondly, a filtrate circulation system, characterized in that the filtrate circulation system comprises:

[0021] The first liquid collection device contains circulating filtrate.

[0022] A peristaltic pump for drawing in and transferring the circulating filtrate;

[0023] A flange assembly is provided at one end of the peristaltic pump, and the flange assembly is used to filter the circulating filtrate and discharge a portion of the unfiltered circulating filtrate for recirculation;

[0024] The second liquid collection device contains filtrate, which is obtained by filtering the circulating filtrate through a flange assembly.

[0025] The technical solution adopted in this invention has the following beneficial effects:

[0026] 1. This invention provides a first filter element groove and a liquid outlet on the lower cover, and a second filter element groove, a liquid inlet, and a circulation outlet on the upper cover. The upper and lower covers are assembled and fixed by a connector. The plate filter element is fixed by the cooperation of the first and second filter element grooves. The first valve is connected to the liquid inlet, and the second valve is connected to the circulation outlet. The flow rate of the filtrate into the flange assembly can be controlled by the first and second valves, thereby achieving control of the driving pressure during membrane separation, protecting the plate filter element, preventing damage to the plate filter element caused by excessive flow and increasing the service life of the plate filter element.

[0027] 2. The present invention provides a gasket inside the first filter element groove of the lower cover. The gasket can adapt to various types and thicknesses of plate filter elements, making the plate filter element more stable inside the upper cover, thereby protecting the plate filter element from damage caused by impact with the inner wall of the upper cover.

[0028] 3. This invention can perform membrane separation by connecting multiple flanges in series or in parallel, which helps to obtain a larger permeate flux, improves the separation efficiency of membrane separation, reduces the fouling of the plate filter element, and increases the service life of the plate filter element. Attached Figure Description

[0029] Figure 1 A cross-sectional structural diagram of a flange assembly provided by the present invention;

[0030] Figure 2 A flange assembly provided by the present invention Figure 1 Partial schematic diagram at point A in the middle;

[0031] Figure 3 A schematic diagram of the lower cover structure of a flange assembly provided by the present invention;

[0032] Figure 4A schematic diagram of the lower cover structure of a flange assembly provided by the present invention;

[0033] Figure 5 A schematic diagram of the upper cover structure of a flange assembly provided by the present invention;

[0034] Figure 6 A schematic diagram of the cross-sectional structure of the upper cover of a flange assembly provided by the present invention;

[0035] Figure 7 This is a schematic diagram of the working process of a filtrate circulation system provided by the present invention.

[0036] 1. Lower cover; 2. Upper cover; 3. Connector; 4. First valve; 5. Second valve; 6. Plate filter element; 7. First filter element groove; 8. Liquid outlet; 9. Second filter element groove; 10. Liquid inlet; 11. Circulation outlet; 12. Gasket; 13. Boss; 14. Threaded hole; 15. Groove; 16. Sealing ring; 17. Pressure gauge; 18. First liquid collection device; 19. Peristaltic pump; 20. Flange assembly; 21. Second liquid collection device. Detailed Implementation

[0037] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should also be noted that the same or similar reference numerals in the accompanying drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present 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. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] There are many traditional methods for preparing separation membranes, such as NIPS (Nap Precipitation Phase Inversion), TIPS (Thermal Induced Phase Separation), VIPS (Vapor Vapor Induced Phase Separation), and melt extrusion-stretching. These methods all involve almost identical processes, including a dissolution / melting process and a phase inversion. Because these methods have inherent limitations, the resulting membranes often fail to meet specific requirements in terms of pore structure, hydrophilicity / hydrophobicity, and membrane strength. In membrane separation technology, disc flange assemblies are typically used to clamp or support functional materials with separation properties (such as microporous filter membranes), ensuring that the internal porous structure of the material is not damaged under certain operating pressures, thus preserving its separation properties. Plate filter cartridges can withstand higher operating pressures and provide larger permeate flux, replacing microporous filter membranes. However, existing disc flange assemblies are often dead-end filtration devices, making it difficult to control the driving pressure during membrane separation, which can easily damage the plate filter cartridge. Furthermore, dead-end filtration is often accompanied by severe fouling, significantly impacting the lifespan of plate filter cartridges.

[0042] Therefore, this application aims to provide a solution that can solve the above-mentioned technical problems, the details of which will be described in subsequent embodiments.

[0043] Please see Figures 1-7 , Figure 1 A cross-sectional structural diagram of a flange assembly provided by the present invention; Figure 2 A flange assembly provided by the present invention Figure 1 Partial schematic diagram at point A in the middle; Figure 3 A schematic diagram of the lower cover structure of a flange assembly provided by the present invention; Figure 4 A schematic diagram of the lower cover structure of a flange assembly provided by the present invention; Figure 5 A schematic diagram of the upper cover structure of a flange assembly provided by the present invention; Figure 6 A schematic diagram of the cross-sectional structure of the upper cover of a flange assembly provided by the present invention; Figure 7This is a schematic diagram of the working process of a filtrate circulation system provided by the present invention. The present invention provides a flange assembly and a filtrate circulation system. The flange assembly is used to load a plate filter element. The flange assembly comprises: a lower cover 1, an upper cover 2, a connector 3, a first valve 4, and a second valve 5. The lower cover 1 has a first filter element groove 7 and a liquid outlet 8. The first filter element groove 7 is located at one end of the lower cover 1 and is used to load the plate filter element 6. The liquid outlet 8 radially penetrates the lower cover 1 and communicates with the first filter element groove 7, and is used to discharge filtrate. The upper cover 2 abuts against one end of the lower cover 1 and is located on one side of the first filter element groove 7. The upper cover 2 has a second filter element groove 9, a liquid inlet 10, and a circulation outlet 11. The second filter element groove 9 is located at one end of the upper cover 2 facing the lower cover 1, and the second filter element groove 9 cooperates with the first filter element groove 7. The liquid inlet 10 and the circulation outlet 11 radially penetrate the upper cover 2, and the liquid inlet 10 and the circulation outlet 11 are connected to the second filter element groove 9. The liquid inlet 10 is used to input filtrate, and the circulation outlet 11 is used to discharge circulating filtrate. A plurality of connecting members 3 are arranged around the upper cover 2 and the lower cover 1, and the connecting members 3 are used to fasten the upper cover 2 and the lower cover 1. The first valve 4 is detachably connected to one end of the liquid inlet 10 on the upper cover 2. The second valve 5 is detachably connected to one side of the circulation outlet 11 on the upper cover 2.

[0044] The working principle of the flange assembly 20 provided in this embodiment is as follows: When using this invention, the first valve 4 is screwed to the liquid inlet 10 of the upper cover 2, and the second valve 5 is screwed to the circulation outlet 11 of the upper cover 2. Both the first valve 4 and the second valve 5 are connected to the filtrate. The upper cover 2 and the lower cover 1 are fastened together by the connector 3, and the plate filter element 6 is fixed by the cooperation of the first filter element groove 7 and the second filter element groove 9. The first valve 4 and the second valve 5 are adjusted to change the flow rate of the filtrate. The filtrate is filtered by the plate filter element 6, and the filtrate is discharged and collected from the liquid outlet 8 of the lower cover 1. The filtrate that has not been filtered by the plate filter element 6 is discharged through the circulation outlet 11 for recirculation, thereby achieving constant pressure filtrate membrane separation.

[0045] The beneficial effects of the flange assembly 20 provided in this embodiment are at least as follows: The present invention provides a first filter element groove 7 and an outlet 8 on the lower cover 1, and a second filter element groove 9, an inlet 10, and a circulation outlet 11 on the upper cover 2. The upper cover 2 and the lower cover 1 are combined and fixed by the connector 3. The plate filter element 6 is fixed by the cooperation of the first filter element groove 7 and the second filter element groove 9. The first valve 4 is connected to the inlet 10, and the second valve 5 is connected to the circulation outlet 11. That is, the flow rate of the filtrate into the flange assembly 20 can be controlled by the first valve 4 and the second valve 5, thereby realizing the control of the driving pressure during the membrane separation process, protecting the plate filter element 6, preventing the huge pressure generated by the excessive flow from damaging the plate filter element 6, and improving the service life of the plate filter element 6.

[0046] As a further option, see [link / reference] Figures 1-4 The flange assembly 20 further includes a gasket 12, which is disposed inside the first filter element groove 7 and is used to support the plate filter element 6.

[0047] Furthermore, the lower cover 1 is also provided with a boss 13, which is located inside the first filter element groove 7 and abuts against the outer side of the gasket 12.

[0048] Specifically, the flange assembly 20 further includes a gasket 12, and a boss 13 is provided inside the first filter element groove 7. The boss 13 is used to fix the gasket 12, so that the gasket 12 is stably fixed inside the first filter element groove 7. At the same time, the gasket 12 can support the plate filter element 6, so that the present invention can be adapted to various types of plate filter elements 6. In the embodiments of the present invention, the thickness of the gasket 12 is adaptively selected according to the thickness of the plate filter element 6. Meanwhile, the boss 13 is a crescent-shaped boss 13. The crescent-shaped boss 13 not only does not hinder the flow of filtrate and prevent blockage of filtrate outlet, but also facilitates the disassembly of the gasket 12.

[0049] As a further option, see [link / reference] Figure 3 and Figure 5 The lower cover 1 and the upper cover 2 are provided with a plurality of screw holes 14, which are arranged around the lower cover 1 and the upper cover 2 and are engaged with the connector 3.

[0050] Specifically, screw holes 14 are provided on both the upper cover 2 and the lower cover 1. The screw holes 14 can be matched with the connectors 3, which facilitates the splicing and fixing of the upper cover 2 and the lower cover 1. By setting multiple screw holes 14 and multiple connectors 3, the upper cover 2 and the lower cover 1 can achieve a tighter fit.

[0051] As a further option, see [link / reference] Figure 1 , Figure 5 and Figure 6 The upper cover 2 has a groove 15 at one end facing the lower cover 1.

[0052] Furthermore, the flange assembly 20 also includes a sealing ring 16, which abuts against the interior of the groove 15.

[0053] Specifically, a groove 15 is provided on the lower end face of the upper cover 2. The groove 15 is used to fix the sealing ring 16, which can prevent the filtrate from leaking out during operation and enhance the sealing performance. In the embodiment of the present invention, the groove 15 is an annular groove 15 that cooperates with the sealing ring 16. The sealing ring 16 is a rubber sealing ring 16. The rubber sealing ring 16 has better sealing performance and better ensures that the present invention does not leak during operation.

[0054] As a further option, see [link / reference] Figure 1 The second valve 5 is provided with a pressure gauge 17 at the end opposite to the upper cover 2. The pressure gauge 17 is used to measure and display the pressure of the filtrate inside the second valve 5.

[0055] Specifically, a pressure gauge 17 is also installed on the second valve 5, which can measure the pressure of the filtrate in the second valve 5 in real time, so that the staff can make timely adjustments to the second valve 5 to keep the flow of filtrate at a stable value, thereby fixing the pressure generated by the flow of filtrate and avoiding damage to the plate filter element 6.

[0056] Example 2

[0057] A filtrate recycling system, please refer to Figure 7 The filtrate circulation system includes: a first collection device 18, a peristaltic pump 19, a flange assembly 20, and a second collection device 21. The first collection device 18 contains circulating filtrate, and the peristaltic pump 19 is used to draw and transfer the circulating filtrate. The flange assembly 20 is located at one end of the peristaltic pump 19 and is used to filter the circulating filtrate and discharge some unfiltered circulating filtrate for recirculation. The second collection device 21 contains filtrate, which is obtained by filtering the circulating filtrate through the flange assembly 20.

[0058] Specifically, in this invention, the circulating filtrate is drawn in by the peristaltic pump 19 and then output to the flange assembly 20 by the peristaltic pump 19. After being filtered by the flange assembly 20, a portion of the filtrate filtered by the flange assembly 20 is the filtrate, which is discharged from the flange assembly 20 to the second collection device 21 for centralized collection. The other portion of the filtrate that is not filtered by the flange assembly 20 is discharged through the flange assembly 20 and returned to the first collection device 18 for circulating filtration.

[0059] The structure and function of the flange assembly 20 in this embodiment of the invention will be described in detail below with reference to specific application scenarios:

[0060] In an embodiment of the present invention, the diameter of the screw hole 14 is 6.6 mm, and there are 6 screw holes 14 arranged in a circle. The connector 3 is an M6 bolt, and there are 6 M6 bolts. The M6 ​​bolts cooperate with the screw holes 14, thereby achieving a tight fit between the M6 ​​bolts and the screw holes 14. The first filter element groove 7 is a groove with a diameter of 60 mm and a depth of 5.2 mm. The second filter element groove 9 is a groove with a diameter of 50 mm and a depth of 5 mm, which facilitates axial fixation of the plate filter element 6. Furthermore, the inner diameter of the boss 13 is 52 mm, the outer diameter is 58 mm, and the height is 0.2 mm, which can limit the position of the gasket 12. The inner diameter of the groove 15 is 52 mm, the depth is 2 mm, and the width is 3 mm, which can better fix the sealing ring 16 and effectively prevent leakage.

[0061] When using this invention, the first valve 4 is screwed to the inlet 10 of the upper cover 2, and the second valve 5 is screwed to the circulation outlet 11 of the upper cover 2. The first valve 4 is connected to the peristaltic pump 19, and the second valve 5 is connected to the filtrate. The upper cover 2 and the lower cover 1 are fastened together by the connector 3, and the plate filter element 6 is fixed by the cooperation of the first filter element groove 7 and the second filter element groove 9. The first valve 4 and the second valve 5 are adjusted to change the flow rate of the filtrate. The peristaltic pump 19 is started and draws the filtrate from the first collection device 18 into the upper cover 2. Part of the filtrate is filtered by the plate filter element 6 and becomes filtrate. The filtrate is discharged from the outlet 8 of the lower cover 1 to the second collection device 21 for collection, while the filtrate that has not been filtered by the plate filter element 6 is discharged through the circulation outlet 11 to the first collection device 18 for recirculation, thereby achieving constant pressure filtrate membrane separation.

[0062] To increase separation efficiency, multiple flange assemblies can be connected in series or in parallel to the filtrate circulation system when using this invention.

[0063] In summary, the present invention provides a flange assembly 20, which has the following beneficial effects:

[0064] 1. The present invention provides a first filter element groove 7 and an outlet 8 on the lower cover 1, and a second filter element groove 9, an inlet 10, and a circulation outlet 11 on the upper cover 2. The upper cover 2 and the lower cover 1 are combined and fixed by a connector 3. The plate filter element 6 is fixed by the cooperation of the first filter element groove 7 and the second filter element groove 9. The first valve 4 is connected to the inlet 10, and the second valve 5 is connected to the circulation outlet 11. That is, the flow rate of the filtrate into the flange assembly 20 can be controlled by the first valve 4 and the second valve 5, thereby realizing the control of the driving pressure during the membrane separation process, protecting the plate filter element 6, preventing the huge pressure generated by excessive flow from damaging the plate filter element 6, and improving the service life of the plate filter element 6.

[0065] 2. The present invention provides a gasket 12 inside the lower cover 1. The gasket 12 can adapt to various types and thicknesses of plate filter elements 6, so that the plate filter element 6 can be more stable inside the lower cover 1, thereby protecting the plate filter element 6 from damage caused by impact with the inner wall of the upper cover 2.

[0066] 3. The present invention can perform membrane separation by connecting multiple flanges in series or in parallel, which helps to obtain a larger permeate flux, improves the separation efficiency of membrane separation, reduces the fouling of the plate filter element 6, and improves the service life of the plate filter element 6.

[0067] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A flange assembly for mounting a plate filter element, characterized in that, The flange assembly includes: The lower cover has a first filter element groove and a liquid outlet. The first filter element groove is located at one end of the lower cover and is used to load the plate filter element. The liquid outlet extends radially through the lower cover and is connected to the first filter element groove. The liquid outlet is used to discharge filtrate. The upper cover abuts against one end of the lower cover and is located on one side of the first filter element groove. The upper cover has a second filter element groove, a liquid inlet, and a circulation outlet. The second filter element groove is located at the end of the upper cover facing the lower cover and cooperates with the first filter element groove. The liquid inlet and the circulation outlet radially penetrate the upper cover and are connected to the second filter element groove. The liquid inlet is used to input filtrate, and the circulation outlet is used to discharge circulating filtrate. The diameter of the second filter element groove is smaller than the diameter of the first filter element groove. A plurality of connectors are peripherally disposed through the upper cover and the lower cover, the connectors being used to fasten the upper cover and the lower cover; A first valve is detachably connected to one end of the liquid inlet on the upper cover; The second valve is detachably connected to one side of the circulation outlet on the upper cover; A gasket is detachably disposed inside the first filter element groove, and the gasket is used to support the plate filter element; the lower cover is also provided with a boss, the boss is disposed inside the first filter element groove, and the boss abuts against the outside of the gasket, and the thickness of the gasket can be replaced according to the thickness of the plate filter element. The boss is a crescent-shaped boss, and the two ends of the two crescent-shaped bosses are fitted with a clearance. The height of the boss is lower than the thickness of the gasket.

2. The flange assembly according to claim 1, characterized in that, The boss is a crescent-shaped boss.

3. The flange assembly according to claim 1, characterized in that, The lower cover and the upper cover are provided with a plurality of screw holes, which are arranged around the lower cover and the upper cover and are engaged with the connector.

4. The flange assembly according to claim 1, characterized in that, The upper cover has a groove at one end facing the lower cover.

5. The flange assembly according to claim 4, characterized in that, The flange assembly also includes a sealing ring that abuts against the interior of the groove.

6. The flange assembly according to claim 5, characterized in that, The sealing ring is a rubber sealing ring.

7. The flange assembly according to claim 1, characterized in that, A pressure gauge is provided at the end of the second valve away from the upper cover. The pressure gauge is used to measure and display the pressure of the filtrate inside the second valve.

8. A filtrate circulation system, comprising the flange assembly as described in claims 1-7, characterized in that, The filtrate circulation system includes: The first liquid collection device contains circulating filtrate. A peristaltic pump for drawing in and transferring the circulating filtrate; A flange assembly is provided at one end of the peristaltic pump, and the flange assembly is used to filter the circulating filtrate and discharge a portion of the unfiltered circulating filtrate for recirculation; The second liquid collection device contains filtrate, which is obtained by filtering the circulating filtrate through a flange assembly.

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