Pressure-resistant cross-flow filter with on-line backwashing function

Abstract

The utility model discloses a pressure-resistant cross-flow filter with an on-line backwashing function, which comprises a shell, an upper flange interface is arranged at the top of the shell, the upper flange interface is detachably connected with an upper sealing head, the upper sealing head is provided with a backflow interface, one side of the shell is provided with a backwashing interface, and the backwashing interface is detachably connected with an upper sealing head. A filter liquid outlet is formed in the side, away from the backwashing connector, of the shell, a lower flange connector is arranged at the bottom of the shell and detachably connected with a lower sealing head, the lower sealing head is provided with a feeding connector, a filter element is arranged in the shell, an upper pattern plate is fixedly connected to the top of the filter element, and a lower pattern plate is arranged at the bottom of the shell. The bottom of the filter element is fixedly connected with a lower pattern plate, a plurality of metal films are arranged in the filter element, and the filter element has the characteristics of high backwashing efficiency and high pressure resistance.

Description

Technical Field

[0001] This utility model relates to the field of cross-flow filtration technology, specifically a pressure-resistant cross-flow filter with online backwashing function. Background Technology

[0002] Cross-flow filters are a common type of equipment in the field of liquid filtration and separation, and are widely used in water treatment, chemical, and pharmaceutical industries. The basic principle of a cross-flow filter is to trap solid particles on the surface of the filter element by the tangential flow of liquid on the filter element surface, while the filtrate flows out through the micropores of the filter element.

[0003] However, most existing ceramic membrane cross-flow filters use a honeycomb-shaped porous filter element structure. This structure not only cannot withstand high pressure, but also cannot effectively transmit pressure to the pores inside the filter element during backwashing, resulting in poor backwashing effect. As filtration proceeds, filter cake gradually accumulates on the surface of the filter element, causing filter element blockage, which requires shutdown and disassembly for cleaning, which is time-consuming and labor-intensive.

[0004] Therefore, it is necessary to design a pressure-resistant cross-flow filter with online backwashing function that has high backwashing efficiency and high pressure resistance. Utility Model Content

[0005] The purpose of this invention is to provide a pressure-resistant cross-flow filter with online backwashing function to solve the problems of low backwashing efficiency and low pressure resistance of existing cross-flow filters mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pressure-resistant cross-flow filter with online backwashing function, comprising a housing, an upper flange interface provided at the top of the housing, an upper sealing head detachably connected to the upper flange interface, a return port provided at the upper sealing head, a backwashing port provided on one side of the housing, a filtrate outlet provided on the side of the housing away from the backwashing port, a lower flange interface provided at the bottom of the housing, a lower sealing head detachably connected to the lower flange interface, a feed port provided at the lower sealing head, a filter element disposed inside the housing, an upper perforated plate fixedly connected to the top of the filter element, a lower perforated plate fixedly connected to the bottom of the filter element, and a plurality of metal membranes disposed inside the filter element.

[0007] According to the above technical solution, the reflux interface is detachably connected to a reflux pipe, the reflux pipe is equipped with a reflux valve, and the end of the reflux pipe away from the reflux interface is detachably connected to a concentration tank.

[0008] According to the above technical solution, the bottom of the concentration tank is detachably connected to a feed pipe, a feed valve is provided on the feed pipe, a circulation pump is provided below the feed valve, and the end of the feed pipe away from the concentration tank is detachably connected to the feed interface.

[0009] According to the above technical solution, a differential pressure sensor is installed inside the housing, a backwash pipe is detachably connected to the backwash port, a backwash valve is installed on the backwash pipe, and a soft water tank is detachably connected to the end of the backwash pipe away from the backwash port.

[0010] According to the above technical solution, the filtrate outlet is detachably connected to a filtrate pipe, the filtrate pipe is equipped with a filtrate valve, and the end of the filtrate pipe away from the filtrate outlet is detachably connected to a filtrate tank.

[0011] According to the above technical solution, a temperature sensor is installed inside the housing, and heat insulation interfaces are provided on both sides of the housing above the backwash interface and the filtrate outlet. The heat insulation interface is detachably connected to a heat insulation pipe, and a heat insulation valve is installed on the heat insulation pipe. A heat transfer oil tank is detachably connected to the end of the heat insulation pipe away from the heat insulation interface.

[0012] According to the above technical solution, spare interfaces are provided on both sides of the housing above the insulation interface.

[0013] According to the above technical solution, the lower plate is provided with a number of through holes corresponding to the lower flange interface, and bolts are detachably connected to the number of through holes.

[0014] According to the above technical solution, the housing, the upper sealing head, and the lower sealing head are all made of stainless steel.

[0015] According to the above technical solution, at least two fixing columns are provided on the side of the housing near the filtrate outlet.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0017] (1) By setting up a backwashing interface, backwashing pipe, backwashing valve, soft water tank and differential pressure sensor, after the cross-flow filter has been running for a period of time, a part of the filter cake inside the filter element will accumulate and cannot be sheared away by the circulating liquid, resulting in a decrease in the amount of filtrate extracted. After the differential pressure sensor detects that the transmembrane pressure difference has reached the preset value, it sends a signal to the system, and the system starts the backwashing operation, closes the filtrate valve, opens the backwashing valve, and the soft water in the soft water tank enters the shell through the backwashing pipe to backwash the filter element, realizing the online backwashing function and greatly improving the backwashing efficiency;

[0018] (2) By setting a filter element and a metal membrane, the surface of the metal membrane is relatively smooth. The filter cake is not easy to embed inside the membrane during the filtration process, but is attached to the surface of the metal membrane. When backwashing, the water flow can wash away the filter cake more smoothly, avoiding the filter cake being difficult to remove due to its deep penetration into the pores. This reduces the backwashing time and water consumption, and improves the cleaning efficiency.

[0019] (3) By setting up an upper and lower perforated plate and welding and fixing it to the filter element, the cross-flow filter components are all made of stainless steel metal, which makes the cross-flow filter have high pressure resistance and can withstand high pressure, thus expanding the application range of the cross-flow filter.

[0020] (4) By setting temperature sensors, insulation interfaces, insulation pipes, insulation valves and heat transfer oil tanks, the temperature inside the shell can be adjusted and controlled according to actual needs, so that the filtration process is carried out at a suitable temperature, avoiding the formation of ice crystals inside the shell due to excessively low temperature, which affects the filtration effect and product quality. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structural composition of this utility model;

[0023] Figure 2 This is a schematic diagram of the filter element structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the pipeline connection of this utility model;

[0025] In the diagram: 10. Shell; 11. Upper flange interface; 12. Backwash interface; 121. Backwash pipe; 122. Backwash valve; 123. Soft water tank; 13. Filtrate outlet; 131. Filtrate pipe; 132. Filtrate valve; 133. Filtrate tank; 14. Lower flange interface; 15. Differential pressure sensor; 16. Temperature sensor; 17. Insulation interface; 171. Insulation pipe; 172. Insulation valve; 173. Heat transfer oil tank; 18. Spare interface; 19. Fixed column; 20. Upper sealing head; 21. Return interface; 211. Return pipe; 212. Return valve; 30. Lower sealing head; 31. Feed interface; 311. Feed pipe; 312. Feed valve; 40. Filter element; 41. Upper perforated plate; 42. Lower perforated plate; 43. Metal membrane; 50. Concentrator; 51. Circulation pump. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] Please see Figure 1-2 The present invention provides a technical solution: a pressure-resistant cross-flow filter with online backwashing function, comprising a housing 10, an upper flange interface 11 provided at the top of the housing 10, an upper sealing head 20 detachably connected to the upper flange interface 11, a return interface 21 provided at the upper sealing head 20, a backwashing interface 12 provided on one side of the housing 10, a filtrate outlet 13 provided on the side of the housing 10 away from the backwashing interface 12, a lower flange interface 14 provided at the bottom of the housing 10, a lower sealing head 30 detachably connected to the lower flange interface 14, a feed inlet 31 provided at the lower sealing head 30, a filter element 40 provided inside the housing 10, an upper perforated plate 41 fixedly connected to the top of the filter element 40, a lower perforated plate 42 fixedly connected to the bottom of the filter element 40, and a plurality of metal membranes 43 provided inside the filter element 40.

[0028] In this technical solution, the housing 10 serves as the main structure of the cross-flow filter. The housing 10 houses the filter element 40 and provides a channel for liquid flow. Multiple interfaces are provided on the top, bottom, and sides of the housing 10 for connecting external pipes and equipment. The upper sealing head 20 and lower sealing head 30 are detachably connected to the housing 10 via the upper flange interface 11 and lower flange interface 14, facilitating cleaning and maintenance. When filter cake accumulates inside the filter element 40, causing a decrease in filtration efficiency, soft water can be introduced through the backwash interface 12 to remove the filter cake from inside the filter element 40. The filter cake is removed, and the filtration efficiency is restored. The concentrate enters the housing 10 through the feed port 31. After being filtered by the metal membrane 43 of the filter element 40, the resulting product liquid is discharged from the filtrate outlet 13. The filtered circulating liquid is returned through the return port 21 to realize the recycling of the liquid. The filter element 40 is fixedly connected by the upper tube plate 41 and the lower tube plate 42 to ensure the stability of the filter element 40 under high pressure. The metal membrane 43 has high filtration accuracy, and the filtered filter cake adheres to its surface, making it easy to clean during backwashing, thereby improving the backwashing efficiency.

[0029] Furthermore, the reflux interface 21 is detachably connected to a reflux pipe 211, a reflux valve 212 is provided on the reflux pipe 211, and a concentration tank 50 is detachably connected to the end of the reflux pipe 211 away from the reflux interface 21.

[0030] Through this technical solution, the connection between the return pipe 211, the return interface 21, and the concentration tank 50 establishes a channel for the recycling of circulating liquid. During the filtration process, the circulating liquid flows out from the top and returns to the concentration tank 50. The catalyst is continuously intercepted in the circulating liquid, and solvent and raw material liquid are continuously replenished to the concentration tank 50.

[0031] Furthermore, a feed pipe 311 is detachably connected to the bottom of the concentration tank 50, a feed valve 312 is provided on the feed pipe 311, a circulation pump 51 is provided below the feed valve 312, and the end of the feed pipe 311 away from the concentration tank 50 is detachably connected to the feed interface 31.

[0032] Through this technical solution, the circulating pump 51 provides power to transport the concentrated liquid in the concentration tank 50 to the filter through the feed pipe 311 and the feed interface 31, forming a complete material conveying system.

[0033] Furthermore, a differential pressure sensor 15 is installed inside the housing 10, and a backwash pipe 121 is detachably connected to the backwash port 12. A backwash valve 122 is installed on the backwash pipe 121, and a soft water tank 123 is detachably connected to the end of the backwash pipe 121 away from the backwash port 12.

[0034] Through this technical solution, the differential pressure sensor 15 can monitor the transmembrane pressure difference in real time. During the filtration process, as impurities accumulate on the surface of the filter element 40, the transmembrane pressure difference gradually increases. When the pressure difference reaches the preset threshold, the differential pressure sensor 15 sends a signal to the system, and the system opens the backwash valve 122. Soft water in the soft water tank 123 enters the housing 10 through the backwash pipe 121 to backwash the filter element 40 and regenerate the filter element 40.

[0035] Furthermore, the filtrate outlet 13 is detachably connected to a filtrate pipe 131, a filtrate valve 132 is provided on the filtrate pipe 131, and a filtrate tank 133 is detachably connected to the end of the filtrate pipe 131 away from the filtrate outlet 13.

[0036] Through this technical solution, the filtrate pipeline 131 connects the filtrate outlet 13 and the filtrate tank 133, thus establishing a filtrate collection channel, which allows the filtrate filtered by the filter element 40 to be smoothly transported from the filter housing 10 to the filtrate tank 133 for storage.

[0037] Furthermore, a temperature sensor 16 is installed inside the housing 10, and heat insulation interfaces 17 are installed on both sides of the housing 10 above the backwash interface 12 and the filter liquid outlet 13. The heat insulation interface 17 is detachably connected to a heat insulation pipe 171, and a heat insulation valve 172 is installed on the heat insulation pipe 171. The end of the heat insulation pipe 171 away from the heat insulation interface 17 is detachably connected to a heat transfer oil tank 173.

[0038] Through this technical solution, the temperature sensor 16 monitors the temperature inside the housing 10 in real time. When the temperature drops to the standard value, the temperature sensor 16 sends a signal to the system, and the system opens the heat-insulating valve 172 to transport the heat-conducting oil in the heat-conducting oil tank 173 to the inside of the housing 10, thereby preventing the temperature inside the housing 10 from being too low and forming crystals.

[0039] Furthermore, spare interfaces 18 are provided on both sides of the housing 10 above the insulation interface 17;

[0040] Through this technical solution, the backup interface 18 provides the possibility for the subsequent functional expansion of the cross-flow filter. At the same time, in the actual production process, unexpected situations may occur. When the backwash interface 12 or the filter liquid outlet 13 becomes blocked, the backup interface 18 can be used as an emergency channel.

[0041] Furthermore, the lower tube sheet 42 is provided with several through holes corresponding to the lower flange interface 14, and bolts are detachably connected to the several through holes;

[0042] This technical solution greatly simplifies the assembly and disassembly process of the cross-flow filter. When it is necessary to inspect the inside of the cross-flow filter, simply remove the bolts to separate the lower tube sheet 42 from the lower flange interface 14, which is convenient for operation.

[0043] Furthermore, the housing 10, the upper sealing head 20, and the lower sealing head 30 are all made of stainless steel.

[0044] This technical solution utilizes stainless steel, which possesses high strength and excellent pressure resistance, enabling it to withstand the high pressure generated during the filtration process.

[0045] Furthermore, at least two fixing posts 19 are provided on the side of the housing 10 near the filtrate outlet 13;

[0046] Through this technical solution, the fixing column 19 can firmly fix the shell 10 to the mounting foundation, resist the action of these external forces, and keep the shell 10 stable.

[0047] Working Principle: First, the concentrate starts from the concentration tank 50 and, under the action of the circulation pump 51, enters the housing 10 through the feed pipe 311 and feed inlet 31. After entering the housing 10, it forms a product liquid, which flows into the filter element 40. Several metal membranes 43 inside the filter element 40 perform filtration, effectively intercepting impurities, particles, and catalysts in the concentrate, thus obtaining filtrate. The filtrate seeps out from the filter element 40 and flows out through the filtrate outlet 13 on one side of the housing 10. The filtrate enters the filtrate tank 133 for storage through the filtrate pipe 131. The incompletely filtered circulating liquid, carrying the intercepted catalysts and other substances, flows out through the return port 21 and returns to the concentration tank 50 through the return pipe 211. During this process, solvent and raw material liquid are continuously replenished to the concentration tank 50, realizing the recycling of liquid. As impurities accumulate on the surface of the metal membranes 43 of the filter element 40, they will form... As the filter cake forms, the transmembrane pressure difference gradually increases. At this point, the differential pressure sensor 15 inside the housing 10 detects that the pressure difference has reached a preset threshold, indicating that the filtration efficiency of the filter element 40 has significantly decreased and backwashing is required. The differential pressure sensor 15 sends a signal to the system. After receiving the signal, the system closes the filtrate valve 132 and opens the backwash valve 122. Soft water from the soft water tank 123 enters the housing 10 through the backwash pipe 121 to backwash the filter element 40. Throughout the filtration process, the temperature sensor 16 monitors the temperature inside the housing 10 in real time. When the temperature drops to the threshold, the temperature sensor 16 sends a signal to the system. The system opens the insulation valve 172 and closes the backwash valve 122 and the filtrate valve 132. The heat from the heat transfer oil in the heat transfer oil tank 173 is used to heat and insulate the inside of the housing 10 to prevent crystallization of the internal liquid due to excessively low temperature, which would affect the filtration effect.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or specific orientation structure and operation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0049] In the description of this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this utility model without contradiction.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant cross-flow filter with online backflushing function, comprising a housing (10), characterized in that: The shell (10) top is provided with upper flange interface (11), the upper flange interface (11) is detachably connected with upper sealing head (20), the upper sealing head (20) is provided with backflow interface (21), one side of the shell (10) is provided with backflush interface (12), the side of the shell (10) away from backflush interface (12) is provided with filter liquid outlet (13), the bottom of the shell (10) is provided with lower flange interface (14), the lower flange interface (14) is detachably connected with lower sealing head (30), the lower sealing head (30) is provided with material inlet interface (31), the inside of the shell (10) is provided with filter core (40), the top of the filter core (40) is fixedly connected with upper flower plate (41), the bottom of the filter core (40) is fixedly connected with lower flower plate (42), the inside of the filter core (40) is provided with a plurality of metal membranes (43).

2. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The backflow interface (21) is detachably connected with backflow pipeline (211), the backflow pipeline (211) is provided with backflow valve (212), and the end of the backflow pipeline (211) away from the backflow interface (21) is detachably connected with concentration tank (50).

3. The pressure-resistant cross-flow filter with online back-flushing function according to claim 2, characterized in that: The bottom of the concentration tank (50) is detachably connected with material inlet pipeline (311), the material inlet pipeline (311) is provided with material inlet valve (312), the circulation pump (51) is arranged below the material inlet valve (312), and the end of the material inlet pipeline (311) away from the concentration tank (50) is detachably connected with the material inlet interface (31).

4. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The inside of the shell (10) is provided with differential pressure sensor (15), the backflush interface (12) is detachably connected with backflush pipeline (121), the backflush pipeline (121) is provided with backflush valve (122), and the end of the backflush pipeline (121) away from the backflush interface (12) is detachably connected with soft water tank (123).

5. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The filter liquid outlet (13) is detachably connected with filter liquid pipeline (131), the filter liquid pipeline (131) is provided with filter liquid valve (132), and the end of the filter liquid pipeline (131) away from the filter liquid outlet (13) is detachably connected with filter liquid tank (133).

6. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The inside of the shell (10) is provided with temperature sensor (16), the both sides of the shell (10) are provided with heat preservation interface (17) above the backflush interface (12) and the filter liquid outlet (13), the heat preservation interface (17) is detachably connected with heat preservation pipeline (171), the heat preservation pipeline (171) is provided with heat preservation valve (172), and the end of the heat preservation pipeline (171) away from the heat preservation interface (17) is detachably connected with heat conduction oil tank (173).

7. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The both sides of the shell (10) are provided with standby interface (18) above the heat preservation interface (17).

8. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The lower flower plate (42) is provided with a plurality of through holes corresponding to the lower flange interface (14), and a plurality of bolts are detachably connected to the through holes.

9. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The shell (10), the upper sealing head (20) and the lower sealing head (30) are all made of stainless steel.

10. The pressure-resistant cross-flow filter with online back-flushing function according to claim 1, characterized in that: The shell (10) is provided with at least two fixed columns (19) on the side of the filtrate outlet (13).

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