Filter cartridge and microfilter

Abstract

The utility model discloses a filter cartridge and microfiltration machine, including filter cartridge body and multiple filter screen modules, be equipped with the cavity in filter cartridge body, the open mouth of being communicated at the cavity is seted up to the one end of filter cartridge body, and the sidewall of filter cartridge body is seted up to the through -hole of being communicated at the cavity with multiple, multiple filter screen modules can dismantle formula installation in the circumferi of filter cartridge body, and multiple filter screen modules cover all parts of filter cartridge body circumferi and form the filter layer. The filter screen on the filter cartridge body is partially blocked or damaged, and the whole needs to be disassembled and replaced, which is time -consuming and easy to damage the mounting frame of the microfiltration machine.

Description

Technical Field

[0001] This utility model relates to the field of microfiltration technology, specifically to a filter cartridge and a microfiltration machine. Background Technology

[0002] A microfilter is a high-efficiency filtration device used for cleaning water in aquaculture ponds. The microfilter includes a tilting filter cartridge. Unfiltered water enters through both sides of the tilting filter cartridge, and the dirt in the water is filtered onto the tilting filter cartridge. The filtered water is discharged through one side of the microfilter. The dirt on the tilting filter cartridge is cleaned by a special spray mechanism and collected and discharged through a cleaning tank, thus achieving high-efficiency filtration of the water.

[0003] In current recirculating aquaculture systems, rotary drum microfilters suffer from low maintenance efficiency due to defects in the filter screen fixing structure. The mainstream design uses metal bolts or welding to fix the filter screen to the rotating filter cylinder as a whole. When a local filter screen is damaged or blocked, the entire rotating filter cylinder needs to be disassembled for replacement. A single maintenance takes more than 30 minutes and is prone to damaging the frame, reducing the lifespan of the microfilter. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a filter cartridge and microfilter, which solves the problem that in the prior art, when the filter screen on the filter cartridge is partially blocked or damaged during operation in the microfilter, the entire filter needs to be disassembled and replaced, which is time-consuming and easily damages the installation frame of the microfilter.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a filter cartridge, comprising: A filter cylinder, wherein the filter cylinder has a cavity, one end of the filter cylinder has an opening communicating with the cavity, and the side wall of the filter cylinder has multiple through holes communicating with the cavity; and, Multiple filter modules are detachably installed on the periphery of the filter cylinder, and the multiple filter modules cover all parts of the periphery of the filter cylinder to form a filter layer.

[0006] In one embodiment, the filter cylinder has a plurality of flanges spaced apart along its axial direction on its periphery; the filter module includes a pressure plate, a filter element and a plurality of connectors, the pressure plate has at least one hollow area, and the opposite sides of the pressure plate are detachably connected to two adjacent flanges via at least one of the connectors, and the filter element can be confined between the periphery of the filter cylinder and the pressure plate.

[0007] In one embodiment, the filter element includes a polypropylene perforated plate and a polyamide fiber filter screen, the polyamide fiber filter screen being fixed to the outer side of the polypropylene perforated plate, and the inner side of the polypropylene perforated plate being in contact with the periphery of the filter cylinder.

[0008] In one embodiment, the flange is provided with a plurality of first connecting holes, and the pressure plate is provided with second connecting holes on both opposite sides; the connecting member includes a locking bolt and a locking nut. When the second connecting holes on both opposite sides of the pressure plate correspond to the first connecting holes on two adjacent flanges, the locking bolt can pass through the first connecting hole and the second connecting hole, and the locking bolt is screwed into the locking nut.

[0009] Secondly, this utility model also provides a microfilter, including a filter cartridge as described in any of the above claims. The microfilter includes a base and a drive mechanism. The base has a filter chamber, one end of the base has an inlet communicating with the filter chamber, and the side wall of the base also has an outlet communicating with the filter chamber. The filter cartridge is rotatably installed in the filter chamber, and the opening of the filter cartridge corresponds to the inlet. The drive mechanism is installed on the base and connected to the filter cartridge, and the drive mechanism is used to drive the filter cartridge to rotate around its own axis.

[0010] In one embodiment, the drive mechanism includes a drive motor and a gear. The drive motor is mounted on a base, the output end of the gear is fixedly connected to the output end of the drive motor, and the gear meshes with a gear ring on the filter cylinder.

[0011] In one embodiment, the microfilter further includes a backwashing mechanism, which includes a spray element, a backwash pump, two liquid level sensors, and a controller. The spray element is installed inside the filter chamber and located above the filter cylinder. The backwash pump is installed on the base and connected to the spray element. The two liquid level sensors are respectively installed at opposite ends of the base. Both liquid level sensors and the backwash pump are electrically connected to the controller.

[0012] In one embodiment, the backflushing mechanism further includes a support rod, a receiving hopper, and a guide tube. One end of the support rod is fixedly connected to the receiving hopper, and the other end of the support rod is rotatably connected to the central axis of the filter cylinder. One end of the guide tube is fixedly connected to the receiving hopper and communicates with a groove inside the receiving hopper. The other end of the guide tube is fixedly connected to the base, and the receiving hopper passes through the filter cylinder. The groove corresponds to the spray element.

[0013] In one embodiment, a baffle plate is provided at one end of the base and on both sides of the liquid inlet, and at least one overflow hole is provided on each of the two baffle plates.

[0014] In one embodiment, the top of the seat is provided with at least one cover plate, which can open or close the operating port on the top of the seat.

[0015] Compared with the prior art, the filter cartridge and microfilter provided by this utility model have a cavity inside the filter cartridge, an opening at one end of the filter cartridge communicating with the cavity, and multiple through holes on the side wall of the filter cartridge communicating with the cavity. Multiple filter screen modules are detachably installed on the periphery of the filter cartridge, and the multiple filter screen modules cover all parts of the periphery of the filter cartridge to form a filter layer. After the filter cartridge has been running in the microfilter for a period of time, if a filter screen module becomes clogged or damaged, it can be disassembled for cleaning or replacement, which can shorten the disassembly and assembly time and reduce the maintenance cost of the filter cartridge. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the microfiltration machine provided by this utility model; Figure 2 This is a structural schematic diagram of the microfilter provided by this utility model from another perspective; Figure 3 This is a schematic diagram of the internal structure of the microfilter provided by this utility model; Figure 4 This is a schematic diagram of the structure of the filter cylinder provided by this utility model; Figure 5 This is a structural schematic diagram of the filter cylinder provided by this utility model from another perspective; Figure 6 This is a structural schematic diagram of the filter module provided by this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 only used to explain this utility model and are not intended to limit this utility model.

[0018] To address the issue in existing technologies where the filter cartridge becomes partially clogged or damaged during microfiltration, requiring complete disassembly and replacement of the entire cartridge—a time-consuming process that can damage the microfiltration unit's mounting frame—this approach aims to improve the microfiltration solution. Technical issues. This solution provides a filter cartridge and microfilter that allows for the disassembly and replacement of clogged or damaged filter modules on the filter cartridge, thus shortening maintenance time.

[0019] Please see Figures 1-6 , Figures 1-6A filter cartridge according to one embodiment of the present invention includes a filter cartridge body 1 and a plurality of filter screen modules 2. The filter cartridge body 1 has a cavity inside, and one end of the filter cartridge body 1 has an opening 1a communicating with the cavity. The side wall of the filter cartridge body 1 has a plurality of through holes 1b communicating with the cavity. The plurality of filter screen modules 2 are detachably installed on the periphery of the filter cartridge body 1, and the plurality of filter screen modules 2 cover all parts of the periphery of the filter cartridge body 1 and form a filter layer.

[0020] It should be noted that by detachably connecting multiple filter modules 2 to the filter cylinder 1, a filter module 2 can be disassembled for cleaning or replacement when it becomes clogged or damaged, which can effectively shorten the maintenance time of the filter cylinder 1.

[0021] In one embodiment, the filter cylinder 1 has a plurality of flanges 11 spaced apart along the axial direction on its periphery; the filter module 2 includes a pressure plate 21, a filter element 22 and a plurality of connectors 23, the pressure plate 21 has at least one hollow area, and the opposite sides of the pressure plate 21 are detachably connected to two adjacent flanges 11 via at least one of the connectors 23, and the filter element 22 can be confined between the periphery of the filter cylinder 1 and the pressure plate 21.

[0022] Preferably, the filter cylinder 1 has four flanges on its periphery, and six filter modules 2 are connected between adjacent flanges.

[0023] In one embodiment, the filter element 22 includes a polypropylene perforated plate 221 and a polyamide fiber filter screen 222, the polyamide fiber filter screen 222 being fixed to the outer side of the polypropylene perforated plate 221, and the inner side of the polypropylene perforated plate 221 being in contact with the periphery of the filter cylinder 1.

[0024] It should be noted that the pressure limit of traditional backwash pumps is 0.3 MPa, which cannot effectively remove sticky residues (viscosity > 50 cP) and fibrous feces. Furthermore, the rigid structure of existing stainless steel filters further exacerbates the clogging problem. Due to its high surface energy (approximately 45 mJ / m²), stainless steel filters easily adsorb protein-based sticky residues (contact angle < 90°). In actual tests, the amount of dirt adsorbed within 24 hours reached 120 g / m², while the adsorption amount of plastic filters was only 38 g / m², resulting in a 68% reduction in clogging rate.

[0025] In addition, the sharp edges of stainless steel filter screens (edge ​​curvature radius ≤ 5μm) easily snag fibrous materials (such as algae filaments), while the smooth pore walls of plastic filter screens (curvature radius ≥ 50μm) can achieve a 52% increase in desorption rate, resulting in a 38%-45% decrease in filter screen permeability after 48 hours of continuous operation. This solution uses polypropylene perforated plate 221 and polyamide fiber filter screen 222 as filter elements, which can effectively reduce the clogging rate of the mesh.

[0026] It should be noted that, in order to facilitate the quick connection or disassembly of the pressure plate 21 and the two flanges, specifically, the flanges 11 are provided with a plurality of first connecting holes 11a, and the pressure plate 21 is provided with second connecting holes 21a on both opposite sides; the connecting member 23 includes a locking bolt and a locking nut. When the second connecting holes 21a on both opposite sides of the pressure plate 21 correspond to the first connecting holes 11a on two adjacent flanges 11, the locking bolt can pass through the first connecting hole 11a and the second connecting hole 21a, and the locking bolt is screwed into the locking nut.

[0027] It should be noted that the microfilter 3 includes a base 31 and a drive mechanism 32. The base 31 has a cavity 31a inside. One end of the base 31 has a liquid inlet 31b communicating with the cavity 31a, and the side wall of the base 31 also has a liquid outlet 31c communicating with the cavity 31a. The filter cylinder 1 is rotatably installed in the cavity 31a. The opening 1a of the filter cylinder 1 corresponds to the liquid inlet 31b. The drive mechanism 32 is installed on the base 31 and connected to the filter cylinder 1. The drive mechanism 32 is used to drive the filter cylinder 1 to rotate around its own axis.

[0028] It is understandable that the liquid can enter the cavity of the filter cylinder 1 through the inlet 31b, and the liquid enters the cavity 31a through the through hole 1b on the cylinder 1, the polypropylene perforated plate 221 and the polyamide fiber filter screen 222. The polyamide fiber filter screen 222 can filter impurities in the liquid.

[0029] It should be noted that the drive mechanism 32 is not limited to a specific structure. In one embodiment, the drive mechanism 32 includes a drive motor 321 and a gear 322. The drive motor 321 is mounted on the base 31, and the output end of the gear 322 is fixedly connected to the output end of the drive motor 321. The gear 322 meshes with the gear ring 12 on the filter cylinder 1. The gear 322 is a nylon gear that is resistant to seawater corrosion. The installation position of the drive motor 321 is higher than the position of the liquid inlet 31b.

[0030] In addition, based on the above scheme, the microfilter also includes a backwash mechanism 33, which includes a spray element 331, a backwash pump 332, two liquid level sensors 333, and a controller 334. The spray element 331 is installed in the cavity 31a and located above the filter cylinder 1. The backwash pump 332 is installed on the base 31 and connected to the spray element 331. The two liquid level sensors 333 are respectively installed at opposite ends of the base 31. The two liquid level sensors 333 and the backwash pump 332 are electrically connected to the controller 334.

[0031] Among them, the backwash pump 332 is a vertical multistage pump, which provides a backwash pressure of ≥0.65MPa. Specifically, when the water level difference detected by the two liquid level sensors is ≥10cm, the controller 334 can control the backwash pump 332 to work. The backwash pump 332 pumps the liquid to the spray element 331, and the liquid is sprayed through the spray element 331 to rinse the multiple polypropylene perforated plates 221 and multiple polyamide fiber filter screens 222 on the filter cylinder 1, thereby improving the rinsing efficiency of sticky residual feed by 40%, which is suitable for high-density recirculating aquaculture scenarios.

[0032] Furthermore, to facilitate the discharge of filtered impurities, the backflushing mechanism 33 specifically includes a support rod 335, a receiving hopper 336, and a conduit 337. One end of the support rod 335 is fixedly connected to the receiving hopper 336, and the other end of the support rod 335 is rotatably connected to the central axis of the filter cylinder 1. One end of the conduit 337 is fixedly connected to the receiving hopper 336 and communicates with the groove inside the receiving hopper 336. The other end of the conduit 337 is fixedly connected to the base 31, and the receiving hopper 336 passes through the filter cylinder 1. The groove corresponds to the spray element 331.

[0033] Understandably, when the spray element 331 sprays liquid onto the filter cylinder 1, it can wash away impurities on the polyamide fiber filter screen 222, and the liquid and impurities fall into the receiving hopper 336; in addition, the conduit 337 can be connected to a hose to discharge the liquid and impurities in the receiving hopper 336 through the hose.

[0034] Based on the above scheme, a baffle plate 34 is provided at one end of the base body 31 and on both sides of the liquid inlet 31b, and at least one overflow hole 34a is provided on each of the two baffle plates 34; specifically, by providing overflow holes 34a on the two baffle plates 34, when the water level between the two baffle plates 34 rises to the position of the overflow hole 34a, the liquid can flow out from the overflow hole 34a.

[0035] In addition, the top of the seat 31 is provided with at least one cover plate 35, which can open or close the operating port on the top of the seat 31. Specifically, in one embodiment, one side of the cover plate 35 is hinged to the seat, and a nitrogen spring is connected between the other side of the cover plate 35 and the seat 31.

[0036] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A filter cartridge, characterized by, include: A filter cylinder, wherein the filter cylinder has a cavity, one end of the filter cylinder has an opening communicating with the cavity, and the side wall of the filter cylinder has multiple through holes communicating with the cavity; and, Multiple filter modules are detachably installed on the periphery of the filter cylinder, and the multiple filter modules cover all parts of the periphery of the filter cylinder to form a filter layer.

2. A filter cartridge according to claim 1 wherein, The filter cylinder is provided with multiple flanges at intervals along the axial direction on its periphery. The filter module includes a pressure plate, a filter element, and multiple connectors. The pressure plate has at least one hollow area. Both sides of the pressure plate are detachably connected to two adjacent flanges via at least one of the connectors. The filter element can be confined between the periphery of the filter cylinder and the pressure plate.

3. A filter cartridge according to claim 2 wherein, The filter element includes a polypropylene perforated plate and a polyamide fiber filter screen. The polyamide fiber filter screen is fixed to the outer side of the polypropylene perforated plate, and the inner side of the polypropylene perforated plate is in contact with the periphery of the filter cylinder.

4. A filter cartridge according to claim 2 wherein, The flange is provided with a plurality of first connecting holes, and the pressure plate is provided with second connecting holes on both sides of the flange. The connector includes a locking bolt and a locking nut. When the second connecting holes on opposite sides of the pressure plate correspond to the first connecting holes on the two adjacent flanges, the locking bolt can pass through the first connecting hole and the second connecting hole, and the locking bolt and the locking nut are screwed together.

5. A microfilter, characterized by The microfilter includes the filter cartridge according to any one of claims 1-4, the microfilter comprising a base and a drive mechanism, the base having a filter chamber, one end of the base having an inlet communicating with the filter chamber, and the side wall of the base having an outlet communicating with the filter chamber, the filter cartridge being rotatably mounted in the filter chamber, the opening of the filter cartridge corresponding to the inlet, the drive mechanism being mounted on the base and connected to the filter cartridge, the drive mechanism being used to drive the filter cartridge to rotate around its own axis.

6. A microfilter according to claim 5, wherein The drive mechanism includes a drive motor and a gear. The drive motor is mounted on the base, and the output end of the gear is fixedly connected to the output end of the drive motor. The gear meshes with the gear ring on the filter cylinder.

7. A microfilter according to claim 5, wherein The microfilter also includes a backwashing mechanism, which includes a spray element, a backwashing pump, two liquid level sensors, and a controller. The spray element is installed inside the filter chamber and located above the filter cylinder. The backwashing pump is installed on the base and connected to the spray element. The two liquid level sensors are respectively installed at opposite ends of the base. The two liquid level sensors and the backwashing pump are electrically connected to the controller.

8. A microfilter according to claim 7, wherein The backflushing mechanism further includes a support rod, a receiving hopper, and a guide tube. One end of the support rod is fixedly connected to the receiving hopper, and the other end of the support rod is rotatably connected to the central axis of the filter cylinder. One end of the guide tube is fixedly connected to the receiving hopper and communicates with a groove inside the receiving hopper. The other end of the guide tube is fixedly connected to the base, and the receiving hopper passes through the filter cylinder. The groove corresponds to the spray element.

9. A microfilter according to claim 8, wherein One end of the seat body and on opposite sides of the liquid inlet are provided with water baffles, and at least one overflow hole is arranged on each water baffle.

10. A microfilter according to claim 9, wherein The top of the seat body is provided with at least one cover plate, and the cover plate can open or close the operation port at the top of the seat body.

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