High efficiency precision micro-porous filter

Abstract

The utility model discloses a kind of high-efficiency precision micropore filters, belong to liquid filtering purification field.Solve the problems such as the small processing flow of existing filtering equipment, unstable filtering precision, unsatisfactory regeneration effect and complex chemical cleaning operation.The filter includes the dirt collection cavity in shell from bottom to top, filter cavity, discharge multi-element cavity.Multi-element cavity is separated from filter cavity by horizontal filter plate, and multiple high-molecular composite micropore filter tubes are hung in filter cavity, effectively increase filter area, improve filtering precision and mechanical strength.The upper end of the micropore filter tube is fixed and penetrates horizontal filter plate.The discharge multi-element cavity is separated into N+1 independent unit cavities by N axial splitter plates, and each unit cavity is connected to discharge header pipe through each discharge branch pipe, effectively increases filtering processing flow, improves backflushing backwashing regeneration filter tube efficiency.Good regeneration effect, stable filtering precision, beneficial effect of prolonging filter tube service life, adapt to large-scale continuous production occasion.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid fine filtration equipment, specifically to a high-efficiency precision microporous filter. Background Technology

[0002] In modern industrial production, liquid filtration is a crucial step in ensuring product quality, improving production efficiency, and reducing energy consumption. Industries such as new energy, water treatment, pharmaceuticals, food, and fine chemicals typically require high-precision filtration of raw material liquids to meet the stringent removal requirements of subsequent processes for suspended particles, colloidal impurities, and microorganisms. However, existing fine filtration equipment has several shortcomings:

[0003] 1. Low single-unit processing flow rate and limited filtration area: Traditional filters mostly use integral filter tubes, which limits the filtration area and results in a low processing flow rate per unit time. Furthermore, a single discharge channel easily creates concentrated fluid resistance, further restricting flow rate increases and making it difficult to meet the needs of large-scale continuous production.

[0004] Second, unstable filtration accuracy. Some filters have substandard filter media materials and structural designs. Over long-term use, the filter media is prone to deformation and damage due to material compression, leading to changes in pore size and fluctuations in filtration accuracy. Furthermore, the lack of monitoring methods for filtration performance makes it impossible to detect performance degradation in a timely manner, easily causing product quality fluctuations or even batch rejection.

[0005] Third, the regeneration effect is unsatisfactory, and the cleaning is difficult and incomplete. Filter regeneration mostly relies on a single physical flushing method, which is difficult to remove deep-seated or stubborn contaminants from the filter tubes. Manual disassembly and cleaning is not only time-consuming and labor-intensive, but improper operation can also damage the filter element, affecting the cleaning effect. Even with backwashing, due to the different degrees of clogging in each filter tube, compressed gas / liquid often preferentially passes through the low-resistance path, resulting in insufficient flushing force in high-resistance clogging areas, ineffective removal of deep clogging, low flushing efficiency, and poor overall regeneration effect.

[0006] Fourth, the filter consumables are costly and lack durability. Partial damage to the integral filter tube necessitates replacement of the entire unit, resulting in high replacement costs per transaction. Furthermore, the filter media lacks sufficient wear resistance and compression resistance, making it prone to wear and tear from prolonged exposure to materials, leading to a short lifespan. Incomplete regeneration further accelerates filter tube aging and breakage, further shortening its lifespan and increasing replacement frequency, resulting in persistently high overall operating costs. Utility Model Content

[0007] The purpose of this invention is to provide a high-efficiency precision microporous filter to solve the technical problems of existing filtration equipment, such as low single-unit processing flow, unstable filtration accuracy, unsatisfactory regeneration effect, and easy damage and short lifespan of consumables.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] A high-efficiency precision microporous filter includes a shell, a dirt collection chamber, a filter chamber, a discharge multi-element chamber, a polymer composite filter tube assembly, a discharge branch pipe, and a discharge main pipe.

[0010] The dirt collection chamber is located at the bottom of the shell and has an inverted conical shape. A drain port is provided at the bottom to facilitate the collection and discharge of impurities trapped during the filtration process, preventing impurity accumulation from affecting the filtration effect. A drain valve is installed at the drain port to flexibly control the discharge of impurities.

[0011] The filtration chamber, located above the sludge collection chamber, is a cylindrical cavity integrally connected to the sludge collection chamber. It is used to accommodate the polymer composite filter tube assembly and filter materials. A filter tube support plate is provided on the flange surface at the top of the cavity. This support plate is used to install the polymer composite filter tube assembly and also serves as a sealing partition between the filtration chamber and the discharge multi-element chamber, ensuring that the two are sealed and isolated, allowing fluid to enter the discharge multi-element chamber only through the inside of the filter tubes.

[0012] The polymer composite filter tube assembly consists of multiple suspended polymer composite microporous filter tubes. The upper ends of these filter tubes are fixed and pass through the filter tube support plate, and the lower ends extend to the bottom of the filter chamber, close to the passage at the top of the dirt collection chamber, but do not extend into the dirt collection chamber to avoid contact with deposited impurities.

[0013] The discharge multi-cavity is located on the upper part of the shell, above the support plate, and is divided into N+1 independent unit cavities by N axial guide plates, where N≥1. For example, two guide plates can divide three unit cavities, three guide plates can divide four unit cavities, and so on.

[0014] Each unit chamber is connected to the upper outlet of the filter tube in the corresponding area on the support plate, thereby enabling independent control of the filter tubes in the corresponding area. This allows for both receiving the clean fluid filtered by the filter tubes in the corresponding area and facilitating individual backwashing and chemical regeneration of the filter tubes (equivalent to filter tube sub-groups) in the corresponding area. For example, by setting two guide plates, three independent unit chambers can be separated. Correspondingly, the surface of the support plate at the top of the filter chamber will be divided into three unconnected areas. Multiple microporous filter tubes suspended and fixed on the support plate will be assigned to these three areas, forming a "one-to-one correspondence between area filter tubes and unit chambers" structure. This ensures that each unit chamber communicates only with the filter tubes (filter tube sub-groups) in the corresponding area. This allows for the rapid export of filtered clean fluid from the corresponding unit chamber according to the area, and also enables individual backwashing and other operations on the filter tubes (filter tube sub-groups) in each area through their corresponding unit chamber.

[0015] Each unit chamber is connected to a discharge branch pipe, which connects to the main discharge pipe, ultimately outputting the clean material through the main discharge pipe. In addition, each discharge branch pipe can also be connected to different pipes or equipment to achieve the diversion and classification of the filtered clean fluid for output, or to perform backflushing operations from each branch pipe.

[0016] The discharge manifold is equipped with a discharge port.

[0017] The polymer composite filter tube is made of various materials such as PTFE, PE, PA, and sintered metal powder. It is formed into an integrated structure through hot-melt composite sintering, and has excellent strength, corrosion resistance and filtration accuracy.

[0018] The discharge main pipe is equipped with a backflush port for introducing compressed air for backflush cleaning. During the backflush process, the compressed gas entering through the backflush port blows the filter tube from the inside out. The pressure of the compressed air blows off the impurities attached to the surface of the filter tube, restoring the permeability of the filter tube, improving cleaning efficiency, extending the service life of the filter tube, solving the problem of filter tube clogging, and improving the stability of equipment operation.

[0019] The discharge main pipe is equipped with a backwash port, which is located at the end away from the discharge port. It is used to introduce cleaning medium to backwash the filter tube, flush impurities into the collection chamber and discharge them, thereby achieving deep cleaning of the filter tube.

[0020] The filter also includes a chemical regeneration port and a regeneration circulation port. The chemical regeneration port is located on the side wall pipe of the collection chamber and is used to introduce regeneration media, such as chemical regeneration liquid, to react with contaminants on the filter tube surface, dissolving or decomposing stubborn contaminants, restoring filtration performance, extending the filter tube's service life, and solving the problem that traditional physical cleaning cannot completely remove certain stubborn contaminants. The regeneration circulation port is located on the discharge main pipe and is used to recover the regenerated liquid, returning it to the circulation system to form a regeneration circulation loop. This improves the contact efficiency between the chemical regeneration agent and the filter components, ensuring uniform and sufficient regeneration, and also prevents incompletely regenerated media from being directly discharged from the system.

[0021] During chemical regeneration, environmentally friendly regenerated liquid is injected through the chemical regeneration port, and the regeneration circulation port and circulation pump are turned on simultaneously. The regenerated liquid flows through the sludge collection chamber, filter tube of the filter chamber, discharge multi-element chamber, discharge branch pipe, and discharge main pipe, and then flows back to the pump inlet through the regeneration circulation port. After being pressurized, it re-enters the filter chamber through the chemical regeneration port and sludge collection chamber to form a closed loop circulation (circulation time 1-2 hours, which can be set according to the degree of pollution). The pollutants are removed through the synergistic effect of fluid flushing and chemical dissolution.

[0022] For stubborn contaminants, after filling the collection and filtration chambers with the regenerator, close the regeneration port and maintain static soaking (e.g., 30-60 minutes) to allow the regenerator to fully penetrate and dissolve the impurities. After soaking, turn on the circulation pump and repeat the previous closed-loop process for deep cleaning and regeneration.

[0023] After the regeneration cycle is completed, the regeneration system is shut down, and clean water (or process water) is injected through the backwash port. The residual regeneration liquid and pollutants are completely discharged through the discharge main pipe, discharge branch pipe, discharge multi-chamber, filter chamber and sewage collection chamber discharge port, thus completing the whole process regeneration.

[0024] Therefore, through the integrated flow channel design, the entire chemical regeneration cleaning process can achieve deep cleaning without disassembling the filter tube. Environmentally friendly regenerants and a fully closed-loop circulation system ensure cleaning efficiency and zero wastewater discharge.

[0025] The filter also includes a differential pressure controller. This controller is connected between the filter chamber and the main discharge pipe to monitor pressure changes between them. The controller is connected to pressure taps in both the filter chamber and the main discharge pipe via pressure taps—the pressure tap in the filter chamber is located at the top, and the pressure tap in the main discharge pipe is located at the center of a horizontal straight pipe section—to monitor the pressure difference in real time. The differential pressure controller transmits the pressure difference signal to a PLC control system. The PLC has a preset pressure threshold and an integrated logic control unit, which can analyze the patency of the filter tubes and the overall condition of the filter based on the pressure difference trend. When the pressure difference exceeds the preset threshold, the PLC triggers an audible and visual alarm signal and drives the actuators according to preset logic, such as automatically shutting down the feed pump, closing the feed valve, and opening the backwash valve, to promptly alleviate filter tube blockage, ensure stable operation of the filtration system, achieve intelligent control, and improve equipment stability and automation. This solves the problem of existing filters lacking intelligent monitoring methods, making it difficult to detect filter tube blockage in a timely manner, which can easily lead to equipment downtime or decreased filtration efficiency.

[0026] The filter is equipped with a positive pressure port and an exhaust port. The exhaust port is located on the positive pressure port pipe on the upper side wall of the filter chamber to prevent gas accumulation and gas blockage, which would affect the filtration efficiency. The positive pressure port is connected to an external positive pressure gas source or an upstream pressure system to provide a stable positive pressure to the filter chamber, which pushes the medium to be filtered through the filter components efficiently to remove impurities and achieve purification filtration. When discharging slurry, compressed gas is introduced to discharge the slag in the collection chamber to the slag receiving tank. It also has the following functions: (1) Pressure balance: compensates for the negative pressure at the top caused by the drop in liquid level during filtration, maintains a constant pressure difference between the inside and outside of the filter tube, and prevents the flexible filter tube from collapsing. (2) Gas suppression: constant gas phase pressure suppresses the precipitation of dissolved gas and avoids microbubbles from clogging micropores; the exhaust port releases accumulated gas periodically to form a dynamic balance. (3) System buffer: alleviates pressure changes caused by flow fluctuations or valve adjustments, reduces the load on the feed pump, and ensures the stability of the discharge. (4) Shutdown protection: maintains a slight positive pressure during sudden shutdown, blocks siphon backflow, and prevents secondary pollution of the filtered liquid.

[0027] The side wall of the sludge collection chamber is also provided with a reflux port, which is connected to the feed port or the raw liquid tank through a reflux pipe, and a valve is provided on the reflux pipe.

[0028] When the return port is connected to the feed port through the return pipe, the medium that is not completely filtered in the collection chamber can be directly returned to the feed port, so that it can enter the filter assembly for secondary filtration. This not only improves the utilization rate of raw materials, reduces the discharge of filter residue, and optimizes the filtration effect, but also shortens the circulation path to improve filtration efficiency.

[0029] The reflux port pipe is equipped with a regulating valve, which can adjust the reflux ratio (typically 10% to 30% of the original liquid flow rate) according to the characteristics of the medium and process requirements, thereby further improving the raw material utilization rate, reducing filter residue discharge, and optimizing the filtration effect.

[0030] The reflux port can also be connected to the original liquid tank via a reflux pipe, so that the incompletely filtered medium can be returned to the original liquid tank, mixed with the original medium, and after the medium concentration is balanced, it can be re-entered into the filtration process to extend the overall filtration cycle.

[0031] The reflux port can also be connected to the feed port and the source liquid tank respectively through a three-way valve, so as to realize flexible switching of the reflux path and meet the needs of different scenarios.

[0032] The discharge multi-element cavity can be detachably connected to the top flange structure of the filter cavity through its bottom flange structure. After separation, the filter tube support plate and the polymer composite filter tube assembly fixed thereon can be removed as a whole.

[0033] The preferred detachable connection is a flange bolt connection. In equivalent technical solutions, mechanical connection structures that enable non-destructive assembly and disassembly, such as quick-release clamps and threaded locking rings, can also be used.

[0034] The flange structure is connected by circumferentially distributed bolts, and sealing gaskets are provided on the mating surfaces to ensure a good seal at the connection points, prevent liquid leakage, and improve the safety and reliability of equipment operation. This solves the problems of poor sealing, easy leakage, and negative impacts on filtration efficiency and system stability associated with traditional flange connection structures.

[0035] The polymer composite filter tube assembly is a replaceable structure. When the discharge chamber and the filter chamber are separated, for example, by loosening the bolts on the flanges of both, opening the discharge chamber, and lifting the support plate that fixes the filter tube, the polymer composite filter tube assembly can be removed from the filter chamber along the axial direction as a whole, so as to replace or repair the filter components and adapt to different filtration needs.

[0036] The process unit also includes equipment lugs, which are welded to the two or four sides of the filter housing for installation and fixation. The equipment lugs have mounting holes, allowing the filter to be installed on a foundation or support using bolts or other connectors. During filter operation, the equipment lugs can withstand the weight of the filter and the vibrations generated during operation, ensuring stable operation without shaking or displacement.

[0037] The bottom of the sludge collection chamber is equipped with a drain port and a drain valve. A level sensor (or pressure sensor) is installed on the upper side wall of the sludge collection chamber to monitor the real-time accumulation of filter cake (indirectly determined by changes in liquid level or internal pressure). Simultaneously, a concentration sensor (or turbidity sensor) is installed on the lower side wall of the sludge collection chamber to detect the impurity content of the incompletely filtered media and determine whether it meets the secondary filtration conditions. When the sensor detects that the accumulated filter cake in the sludge collection chamber reaches a preset threshold, or that the residual media does not meet the secondary filtration conditions, a signal is transmitted to the PLC control system. The control system automatically triggers the drain valve to open, discharging the filter cake and residual media through the drain port. This maintains the effective storage space of the sludge collection chamber and ensures the continuous and stable operation of the filtration system.

[0038] The filter housing and all connecting components employ multiple measures to ensure sealing: the filter chamber and collection chamber housings are integrally molded to reduce seams; the joints between the separate discharge chamber and the filter chamber housing are beveled and inspected for flaws to ensure welding strength and sealing. Moving connecting components utilize a double-seal structure of threads and sealant, or quick-release clamps with food-grade silicone sealing rings, balancing ease of disassembly with reliable sealing. For high-pressure filtration scenarios (high-viscosity media, high-speed circulation, forced filtration of high-precision filter tubes), O-ring grooves and interference-fit O-rings are added to key connection points to further enhance the sealing effect and prevent material penetration under high pressure. This multi-dimensional collaboration further ensures the reliability of high-precision filtration.

[0039] The regeneration process can be flexibly adjusted according to the degree of filter tube blockage, and "graded flushing" is adopted: by adjusting the valve opening of each discharge branch pipe, graded flushing of the filter tube is achieved. For filter tubes with different degrees of blockage, the valve of the corresponding branch pipe is opened wider for those with severe blockage, and the valve of the branch pipe is closed for those with lighter blockage, so as to concentrate the flushing force on the severely blocked filter tubes.

[0040] For example, pressure sensors are installed in each discharge branch pipe or unit chamber to monitor the back pressure caused by filter tube blockage in real time (the higher the back pressure, the more severe the blockage). Upon receiving the sensor signal, the controller precisely adjusts the opening of the corresponding branch pipe valves—opening the discharge branch pipe valves of filter tube groups with high back pressure (severe blockage) and closing the branch pipe valves of filter tube groups with low back pressure (lighter blockage). Since the total flow rate is constant, the high back pressure branch can obtain a larger flow rate, using the impact force of the flow to flush away the blockage; simultaneously, as the low back pressure branch pipe valves close, the system pressure is concentrated and directed to the high back pressure branch, forming a localized high-pressure environment that ensures that stubborn impurities are effectively removed, thereby significantly improving the targeting and effectiveness of filter tube regeneration. After regeneration is complete, the system automatically resumes normal filtration.

[0041] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0042] 1. Increased processing flow rate and filtration area: Multiple polymer composite microporous filter tubes are suspended inside the filter chamber, significantly increasing the filtration area per unit volume; the discharge end adopts a multi-cavity structure (independent flow guidance in each unit), significantly reducing fluid discharge resistance. The combination of these two features breaks through the energy bottleneck of traditional single-machine systems, greatly increasing the processing capacity per unit time and meeting the needs of large-scale production.

[0043] 2. Stable and consistent filtration accuracy: The polymer composite microporous filter tube adopts a three-layer functional gradient structure, which is strong and resistant to deformation, making it less prone to damage over long-term use and ensuring a constant filter pore size. Combined with a differential pressure controller for real-time monitoring, a triple regeneration process (backflushing, backwashing, and chemical regeneration) promptly removes impurities, avoiding "false enlargement" caused by clogging and maintaining the filtration accuracy within the set range.

[0044] 3. More Thorough Regeneration: Through a progressive "triple regeneration step" (physical stripping of surface impurities – rinsing with clean water to remove residues – chemical dissolution of stubborn contaminants), combined with a "segmented flushing" mechanism (precisely allocating flow and pressure according to different degrees of clogging), regeneration energy is concentrated on severely clogged filter tubes, achieving "targeted cleaning." Compared to traditional indiscriminate flushing, it thoroughly removes surface and deep-seated contaminants from the filter tubes, bringing filtration performance closer to its initial state and significantly improving regeneration effect and cleaning efficiency.

[0045] 4. Simplified and reliable chemical cleaning operation: Through structures such as the regeneration circulation port, it can be directly connected to the automatic control system to achieve full-process programmable control of regeneration solution ratio, circulation time, and flow rate; eliminating manual intervention, reducing labor costs, eliminating human error, ensuring stable cleaning effect, extending equipment service life, and completely solving the problems of cumbersome and unreliable traditional chemical cleaning.

[0046] 5. Extended filter life: The pressure controller monitors and promptly initiates a triple regeneration cleaning program based on the degree of clogging. This avoids the need for filter cleaning and maintenance due to long-term accumulation of impurities, removes surface and deep impurities from the filter tube, quickly restores filtration performance, reduces wear and tear caused by "overloaded filtration," and significantly extends the filter tube's lifespan. The frequency and cost of consumable replacements are reduced simultaneously. Attached Figure Description

[0047] Figure 1 A partial cross-sectional view of the filter structure according to an embodiment of this utility model;

[0048] Figure 2 : A partial sectional side view of the filter structure according to an embodiment of this utility model;

[0049] Figure 3 : Control block diagram of an embodiment of this utility model;

[0050] The markings in the diagram are: 1. Sludge collection chamber; 2. Filter chamber; 3. Main discharge pipe; 4. Polymer composite microporous filter tube; 5. Equipment lug; 6. Discharge multi-element chamber; 7. Discharge branch pipe; 8. Differential pressure controller; 9. Guide plate; N1. Inlet valve; N2. Regeneration port valve; N3. Sludge discharge port valve. Detailed Implementation

[0051] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0052] Example 1.

[0053] A high-efficiency precision microporous filter is characterized by comprising a shell, a dirt collection chamber 1, a filter chamber 2, a discharge multi-element chamber 6, a polymer composite filter tube assembly, a discharge branch pipe 7, and a discharge main pipe 3.

[0054] • The sludge collection chamber 1 is located at the bottom of the shell and has an inverted conical structure to facilitate the collection of impurities trapped during the filtration process. A drain port is located at its bottom, and a drain valve N3 is installed at the drain port to flexibly control the discharge of impurities. After the liquid is filtered through the filter tube, impurities are trapped on the outer wall of the filter tube and flow into the sludge collection chamber 1 with the liquid, and are finally discharged through the drain valve N3.

[0055] The top of the sludge collection chamber 1 is integrally connected with the filter chamber above it, forming an effective channel for impurity settling. When the amount of filter cake accumulated in the sludge collection chamber 1 reaches the preset amount, or when the residual medium after reflux treatment does not meet the secondary filtration conditions, the filter cake and residual medium can be discharged through the drain port to maintain the effective capacity of the sludge collection chamber.

[0056] The sludge collection chamber 1 adopts an inverted cone-shaped sludge collection chamber design and is equipped with a drain valve at the bottom, which concentrates impurities and makes them easy to discharge. This solves the problems in the existing technology where impurities are not easy to clean, easily cause secondary pollution, and are easy to accumulate and discharge, which affect filtration efficiency and equipment life.

[0057] The filter chamber 2, located above the sludge collection chamber 1, is a cylindrical cavity integrally connected to the sludge collection chamber 1. It is the core filtration area of ​​the filter, housing the polymer composite filter tube assembly and filtering the material. A filter tube support plate is located at the top of the chamber. This support plate serves both as the mounting plate for the polymer composite filter tube assembly and as a sealing partition between the filter chamber and the discharge chamber, ensuring a tight seal and allowing fluid to enter the discharge chamber only through the interior of the filter tubes.

[0058] The polymer composite filter tube assembly consists of 120 suspended polymer composite microporous filter tubes 4, evenly spaced within the filter chamber with similar spacing, significantly increasing the filtration area and ensuring uniform fluid flow through each tube. The filter tubes are made of polymer material through winding, sintering, or composite molding processes. The upper ends of these filter tubes are fixed to and pass through the horizontal support plate (e.g., the top outlet of the filter tube is connected to the horizontal support plate via a well-sealed threaded connection), while the lower ends extend to the bottom of the filter chamber 2, near the top of the collection chamber, but do not penetrate into the collection chamber to avoid contact with deposited impurities.

[0059] The use of multiple composite polymer microporous filter tubes not only improves filtration accuracy and durability but also allows for individual replacement, significantly reducing maintenance costs and enhancing equipment maintainability. This solves the problems of traditional integral filter tubes, which have a simple structure, small filtration area, and require complete replacement upon damage, resulting in high costs and inconvenient maintenance.

[0060] The discharge multi-cavity chamber 2 is located on the upper part of the shell, above the support plate, and is divided into four independent unit chambers by three guide plates. Each unit chamber is connected to the upper outlet of the filter tube in the corresponding area on the support plate, thereby realizing independent control of the filter tube in the corresponding area—it can both receive the clean fluid filtered by the filter tube in the corresponding area and facilitate backwashing, chemical regeneration, and other operations on the filter tube in the corresponding area. That is, the three guide plates divide the four independent unit chambers, and the surface of the horizontal support plate at the top of the filter chamber is simultaneously divided into four non-connected areas (area 1, area 2, area 3, and area 4). Multiple microporous filter tubes suspended and fixed on the horizontal support plate are assigned to these four areas, forming a "one-to-one correspondence between area filter tube and unit chamber" structure, so that each unit chamber is only connected to the filter tube in the corresponding area (equivalent to a filter tube subgroup), thereby realizing functions such as regional filtration or independent backwashing.

[0061] Each unit cavity is connected to a discharge branch pipe 7, and all discharge branch pipes 7 are connected to the discharge main pipe 3, ultimately outputting clean material through the discharge main pipe 3. The multiple discharge branch pipes and discharge multi-cavity reduce fluid resistance and increase the single-unit processing flow rate.

[0062] When the discharge chamber is a cavity structure with multiple outlets, its multiple outlets can be connected to different pipes or equipment, which can realize the diversion and output of the filtered fluid, further optimize the fluid output path, and increase the processing flow rate.

[0063] The discharge main pipe 3 is equipped with a discharge port.

[0064] In actual production, the raw material liquid enters the filtration chamber from the feed inlet on the upper side wall of the sludge collection chamber. After parallel filtration by 120 polymer composite microporous filter tubes, the clean filtrate quickly flows out from the top outlet of each filter tube, is divided into four areas and diffuses into the corresponding four unit chambers, and then flows into the main discharge pipe through four discharge branch pipes, and enters the subsequent production stage.

[0065] When the filtrate is diverted to different subsequent processing stages through four discharge branch pipes, the simultaneous operation of multiple discharge branch pipes reduces fluid resistance during the discharge process. The filtrate in the filtration chamber can flow smoothly into the discharge multi-stage chamber and be efficiently distributed to different storage tanks and subsequent production stages through multiple outlets. Compared to traditional filters, this filter significantly increases the single-unit processing flow rate, meeting the needs of large-scale production.

[0066] Alternatively, the filtrate can be diverted to different subsequent processing steps via four discharge branch pipes to meet diverse production needs. Because multiple discharge branch pipes operate simultaneously, fluid resistance during the discharge process is reduced, allowing the filtrate in the filtration chamber to flow smoothly into the multi-stage discharge chamber and be efficiently distributed to different storage tanks and subsequent production stages through multiple outlets. Compared to traditional filters, this filter significantly increases the processing flow rate, fully meeting the needs of large-scale, diversified production.

[0067] The advantages of this "multi-unit cavity-filter tube assembly" structure are:

[0068] 1. Enhanced high-efficiency filtration and processing capacity: The high-density array layout of 120 filter tubes significantly increases the filtration area per unit volume, increasing the processing capacity several times over and effectively solving the filtration bottleneck problem under high flow conditions.

[0069] 2. Optimized system stability through pressure equalization: The pressure equalization mechanism ensures balanced load on the filter tubes, avoids local overload, and makes the system pressure drop more stable, which is especially suitable for continuous filtration of high viscosity media.

[0070] 3. Zoned cleaning improves regeneration efficiency: Allows independent backflushing and rinsing of individual filter tubes, with concentrated pressure for thorough dirt removal. Combined with a rotational cleaning strategy, priority is given to cleaning easily clogged filter tubes, shortening regeneration time and improving regeneration efficiency.

[0071] 4. Group monitoring enables precise maintenance: Each group of filter tubes can be equipped with independent discharge monitoring (flow rate / pressure) to quickly locate abnormal groups. Only the faulty filter tube needs to be replaced, reducing maintenance costs.

[0072] 5. Flexible adaptation to various needs. Valves allow for flexible activation / deactivation of certain filter units, or replacement of different filter units with varying precision levels, enabling flow regulation or staged filtration.

[0073] Example 2

[0074] In this embodiment, the polymer composite microporous filter tube consists of a PTFE microporous membrane layer, a PA66 support mesh layer, and a PEEK protective sheath layer, arranged from the inside out. These layers are manufactured through a composite molding process or a hot-melt composite integral molding process. The PTFE microporous membrane layer has extremely uniform and minute pore sizes, which can be precisely controlled within a range capable of achieving high-precision filtration. For example, common PTFE microporous membranes have pore sizes of 0.1-1 micrometers, effectively intercepting micron-sized and even submicron-sized particles, colloids, microorganisms, and other impurities, ensuring high-precision filtration. Its low surface energy reduces pollutant adsorption, lowers the risk of clogging, and allows the filter to maintain a stable high throughput over a long period, minimizing production interruptions and cost increases due to cleaning or filter tube replacement. The high porosity of the PA66 support mesh layer provides a stable support structure for the PTFE membrane, preventing deformation under filtration pressure and ensuring the stability of the microporous membrane pore size, maintaining reliable filtration accuracy. Its larger pore size forms a low-pressure-loss flow channel, improving fluid penetration and pre-filtering larger particles, reducing the burden on the PTFE membrane and extending its lifespan. The outer PEEK protective sleeve enhances the overall durability, improves the filter tube's resistance to high temperatures and chemical corrosion, ensures stable filtration accuracy during long-term use, and expands the filter's application range. The smooth surfaces of each layer of material synergistically improve anti-fouling performance, extend cleaning cycles, and reduce maintenance frequency.

[0075] The polymer filter tube, employing a multi-layered composite structure, not only improves filtration accuracy and durability but also allows for individual replacement, significantly reducing maintenance costs and enhancing equipment maintainability. This solves the problems of traditional integral filter tubes, which have a simple structure, small filtration area, require complete replacement upon damage, resulting in high costs and inconvenient maintenance.

[0076] Example 3

[0077] In this embodiment, the discharge main pipe 3 is equipped with a backflush interface, which is connected to an external air source or water source device. The connection is sealed to ensure that no gas leakage occurs during the backflush process.

[0078] When the filter tube needs to be cleaned, high-pressure gas or liquid is introduced and enters the discharge multi-element chamber 6 through the discharge main pipe 3 and discharge branch pipe 7 to perform reverse blowing on the filter tube, blowing the impurities on the surface of the filter tube into the dirt collection chamber 2.

[0079] This setup utilizes the existing channels of the main discharge pipe, allowing the backflushing gas to be distributed relatively evenly to each filter tube area. This effectively removes impurities from the filter tube surface, causing them to detach and fall into the collection chamber 1, thereby restoring the filter tube's filtration performance and ensuring the normal operation of the filter. It also reduces the need for additional piping, simplifying the equipment structure. The location of the backflushing interface facilitates the even application of backflushing gas to the filter element, improving the backflushing cleaning effect.

[0080] For example, when the filter needs cleaning or maintenance, open the backflush valve and introduce backflush media (such as compressed air, clean liquid, etc.). This media will then flow in reverse along the path of "main discharge pipe – branch discharge pipe – multi-chamber discharge," impacting the inner wall of the filter tube. This process removes and peels away surface impurities, restoring the filtration performance of the filter components, reducing the frequency of disassembly and cleaning, and improving the filter's operating efficiency and lifespan. Alternatively, partially closing the branch discharge pipe valves allows for targeted backflushing of only severely clogged areas of the filter tube (in this case, the backflush airflow can be concentrated on the target area, improving cleaning efficiency and effectiveness).

[0081] For example, the backflushing interface can be located at the intersection of the discharge branch pipe and the discharge main pipe, connected to the compressed gas source, with its direction forming a 45° angle with the branch pipe. The backflushing gas pressure is 0.5–0.8 MPa, and the purging time is 10–30 s / 10 minutes, effectively blowing most of the organic matter and suspended particles on the surface of the filter tube into the collection chamber.

[0082] This application sets up a back-blowing interface in the discharge main pipe to achieve reverse blowing through compressed air, thereby improving cleaning efficiency, extending filter tube life, enhancing equipment automation, and solving the problem that traditional filter cleaning methods are singular and difficult to effectively remove deposits on the filter tube surface, thus affecting filtration efficiency.

[0083] Example 4

[0084] In this embodiment, the discharge main pipe 3 is provided with a backwash port, which is located at the end away from the discharge port and is used to introduce cleaning medium. It is also connected to the inside of the main pipe. By introducing cleaning medium (such as clean water, solvent, or other suitable cleaning fluid) in reverse, the filter components of the filter are flushed, thereby improving the backwashing effect.

[0085] The backwash port is located at the end furthest from the main discharge port 3, allowing the cleaning medium to flow naturally along the main pipe and be evenly distributed to each discharge branch pipe under internal pressure. When backwashing is initiated, the medium enters the corresponding unit chamber through the discharge branch pipe and then flows back into the polymer composite microporous filter tube, forming a flow direction opposite to normal filtration. The pressure generated by this reverse flow effectively removes contaminants attached to the outer surface of the filter tube. The detached impurities then settle into the inverted conical collection chamber under the combined action of gravity and media flushing, and are finally discharged through the drain port, thus ensuring thorough cleaning of the filter tube.

[0086] With the coordinated operation of the multi-chamber system and the differential pressure controller, the independent unit structure of the multi-chamber system allows each filter tube in each area to be backwashed individually. The differential pressure controller monitors the pressure changes between the filter chamber and the discharge main pipe in real time, promptly determining the degree of filter tube blockage. When a filter tube in a certain area becomes blocked, causing abnormal pressure in the corresponding unit chamber, the control system immediately locks that area and initiates the backwash program only for that area. This achieves precise operation of "washing only where it is blocked," avoiding the resource waste caused by traditional whole-area backwashing and improving cleaning coverage and efficiency.

[0087] This backwashing design, combined with the intelligent linkage of multiple chambers and a differential pressure controller, significantly improves the system's flexibility and operational efficiency. Through targeted cleaning, the filter tube's permeability is guaranteed over the long term, resulting in stable and efficient filtration performance. This also reduces energy consumption and equipment maintenance costs.

[0088] A backwash port is installed at the end of the discharge main pipe, which, combined with a differential pressure controller, enables automatic backwashing, reducing manual operation, ensuring stable filtration efficiency, and adapting to the needs of continuous production. This solves the problem of existing technologies lacking an effective automatic cleaning mechanism and requiring manual intervention.

[0089] Example 5

[0090] In this embodiment, the filter is equipped with a chemical regeneration port and a regeneration circulation port, which work together to achieve the regeneration and reuse of the filter media, effectively improving resource utilization. The chemical regeneration port is located on the side wall pipe of the collection chamber 1. The bottom-side location facilitates thorough mixing of the chemical regenerant and contaminants, improving regeneration efficiency and reducing contaminant residue in the collection chamber, resulting in: 1. More thorough contaminant discharge. The bottom-side location allows for better contact between the chemical regenerant and the contaminants accumulated in the collection chamber, especially when cleaning stubborn contaminants deposited at the bottom. Injecting the regenerant from the bottom side allows for better penetration and action, making the contaminants easier to dissolve or disperse, and subsequently, smoother discharge. 2. Reduced residue: Compared to the bottom center location, the bottom-side port reduces the possibility of residue in corners and other areas of the collection chamber when discharging the regenerated mixture, improving regeneration effect and efficiency.

[0091] The chemical regeneration port is used to directly inject regeneration media, such as chemical cleaning agents, to remove stubborn contaminants from the filter components through chemical cleaning and restore filtration performance.

[0092] The regeneration circulation port is located on the main discharge pipe 3, forming a closed loop with the circulation pump to return the regenerated medium to the circulation system. This dual-port design supports complete in-situ chemical cleaning: the regenerated liquid is driven by the circulation pump to circulate within the system (chemical regeneration port → collection chamber → filter chamber / filter tube → discharge chamber → discharge branch pipe → main discharge pipe → regeneration circulation port → circulation pump → chemical regeneration port), evenly covering the surface of the filter tube and fully dissolving the attached stubborn contaminants. The entire process can complete deep cleaning without disassembling the filter element, which not only improves the contact efficiency between the chemical regenerator and the filter components, ensuring uniform and sufficient regeneration, but also avoids the direct discharge of incompletely regenerated medium, significantly improving maintenance efficiency.

[0093] The chemical regeneration port is equipped with corresponding valves to control the injection volume and injection time of the chemical regenerant, ensuring the safety and effectiveness of the regeneration process.

[0094] Workflow:

[0095] 1. Liquid injection and soaking: Inject environmentally friendly regenerated liquid into the chemical regeneration port until the collection chamber, filter tube and discharge chamber are filled. Close the chemical regeneration port and stop the injection. Keep soaking for 30-60 minutes to allow the regenerated liquid to fully penetrate and dissolve stubborn pollutants.

[0096] 2. Circulation cleaning: After soaking, turn on the regeneration circulation port and circulation pump. The regeneration liquid flows through the discharge chamber, discharge branch pipe and discharge main pipe in sequence, and flows back to the circulation pump inlet through the regeneration circulation port. After being transported by the circulation pump, it is injected into the chemical regeneration port and re-enters the filter chamber to form a closed loop (the circulation time can be set according to the cleaning effect) to further enhance the dissolution of pollutants.

[0097] 3. Rinsing stage: After the circulation is completed, shut down the regeneration circulation system and inject clean water (or process water) through the inlet. The water flows through the filter chamber, the discharge system and the drain outlet in sequence to completely discharge the residual regeneration liquid and dissolved pollutants, thus completing the regeneration.

[0098] The entire process can be completed without disassembling the filter element for deep cleaning, and the use of environmentally friendly regenerants and environmentally friendly materials for contact parts balances cleaning efficiency and environmental friendliness.

[0099] Equipped with a chemical regeneration port and a regeneration circulation port, this system allows for the introduction of chemical regeneration solution for deep cleaning and enables the recycling of the regeneration solution. This improves cleaning effectiveness, extends filter tube lifespan, and reduces operating costs. It solves the problem of traditional cleaning methods failing to remove stubborn contaminants, thus affecting filter tube lifespan and filtration efficiency.

[0100] Example 6

[0101] In this embodiment, the filter is equipped with a differential pressure controller, which is connected between the filter chamber 2 and the discharge main pipe 3. The pressure sensing element inside the differential pressure controller is connected to the pressure taps of the filter chamber and the discharge main pipe respectively through pressure taps (the pressure tap of the filter chamber is located at the top of the filter chamber, and the pressure tap of the discharge main pipe is located in the middle of the pipe—away from pressure disturbance components such as bends and valves), to monitor the pressure difference between the filter chamber 2 and the discharge main pipe in real time, determine the filter tube blockage status, and trigger the regeneration program in a timely manner.

[0102] Compared to traditional methods that only measure the pressure in the filter chamber, measuring the pressure difference between the filter chamber and the discharge manifold has significant advantages. Monitoring the filter chamber pressure alone only reflects changes in the absolute pressure within the chamber and cannot effectively distinguish between pressure changes caused by filter media blockage (increased filtration resistance) and those caused by external factors (such as sudden increases in pump output pressure causing pressure fluctuations at the inlet or unexpected closure of the outlet valve). This can easily lead to misjudgments and erroneous operations such as backwashing (premature or delayed initiation). Furthermore, when the inlet pressure is unstable, the actual blockage state of the filter media is difficult to accurately determine (the correlation between changes in filter chamber pressure and the degree of blockage weakens significantly; situations may arise where the filter media is severely blocked but the pressure has not reached the threshold (due to a drop in inlet pressure), or where the filter media is not blocked but a sudden increase in inlet pressure triggers backwashing), thus affecting filtration efficiency.

[0103] Pressure differential measurement can directly quantify the increase in filter media resistance, unaffected by external factors. As impurities accumulate on the filter media surface, filtration resistance increases, and the pressure differential between the filter chamber and the discharge manifold also increases synchronously. This change is mainly caused by filter media clogging. Therefore, it can more accurately identify the true state of the filter media, ensuring that backwashing and other procedures are initiated at the correct time, thereby improving the stability and efficiency of the filtration system and guaranteeing high precision and high quality of the filtered material.

[0104] Automatic differential pressure monitoring and regeneration linkage: When the differential pressure reaches a preset threshold, the control system can issue an audible and visual alarm to check the filter tube status. It can also automatically trigger the regeneration program (including backflushing, backwashing, or chemical regeneration) to remove impurities from the filter tube surface and restore its filtration performance. This achieves linkage between automatic differential pressure monitoring and triple regeneration, enabling intelligent system management and reducing manual intervention. Furthermore, users can switch between manual and automatic modes via the operation display panel to adapt to different operating conditions (e.g., automatic mode for continuous production scenarios, switching to manual mode for special process requirements), ensuring stable filter operation under various conditions.

[0105] Differential pressure controllers also provide key parameter support for the automated control of filtration systems. They transmit real-time data to the control system, enabling intelligent adjustment and reducing manual intervention costs. Simultaneously, recording differential pressure change curves provides operators with data to analyze filter media characteristics and optimize filtration process parameters, helping to improve the overall operational economy of the filtration system. In high-precision filtration scenarios, even minute changes in differential pressure can provide early warning of initial clogging trends in the filter element, offering dual protection for maintaining the quality of filtration products.

[0106] Example 7

[0107] In this embodiment, the filter has a positive pressure port and an exhaust port. The upper side wall of the filter chamber 4 is provided with a positive pressure pipe, and the inlet end (positive pressure port) of the positive pressure pipe is equipped with a positive pressure valve to control the injection of external compressed gas. An exhaust branch pipe (preferably connected via a tee connector) is connected to this positive pressure pipe, and an exhaust port is provided at the end of the exhaust branch pipe. An exhaust valve is installed at this exhaust port, forming a compact integrated structure with "one pipe for two purposes". Furthermore, the exhaust port is located at the highest point of the positive pressure port pipe, which facilitates the natural upward accumulation and smooth discharge of gas, preventing air resistance and improving filtration efficiency.

[0108] The exhaust port is controlled by an exhaust valve, which serves to: (1) during the initial liquid injection stage, expel air from the chamber to prevent air resistance from affecting filtration efficiency. (2) during the filtration process, periodically discharge dissolved gases that are released due to pressure changes (or liquid flow) to prevent microbubbles from clogging the filter media. (3) overpressure protection and pressure regulation. When the system pressure exceeds the set value, the exhaust valve automatically opens to quickly release pressure and prevent overpressure damage to the system. At the same time, the exhaust valve closes during positive pressure gas supply to ensure that the system maintains the required pressure.

[0109] In traditional structures, the positive pressure port is only used to inject compressed gas to push impurities out through the drain port. In addition to the above functions, the positive pressure port of this filter also has the following functions: (1) Maintaining system pressure. It compensates for the negative pressure at the top caused by the drop in liquid level during the filtration process, maintains a constant pressure difference between the inside and outside of the filter tube, prevents the flexible filter tube from collapsing due to negative pressure, and ensures stable filtration. (2) Suppressing bubble precipitation: By maintaining a constant system pressure, it reduces the precipitation of dissolved gas in the liquid, avoids microbubbles from clogging the micropores of the filter tube, and improves filtration efficiency and accuracy. (3) System buffering function. Stable internal pressure helps to alleviate the instantaneous pressure change caused by fluctuations in feed flow or valve switching, reduces the load on the feed pump, and ensures stable discharge. (4) Shutdown protection mechanism: In the event of a sudden shutdown or system abnormality, the positive pressure port can maintain a slightly positive pressure state in the system to prevent siphon backflow, avoid backflow of the filtered liquid causing secondary pollution, and protect the clean side of the filter tube from contamination.

[0110] Traditionally, positive pressure gas supply and gas discharge are considered two opposing processes: the former is used to establish and maintain internal system pressure, while the latter is used to release excess gas to prevent overpressure. Therefore, separate positive pressure and exhaust pipes are usually used to achieve these functions, resulting in problems such as complex system structure, large space occupation, and slow control response.

[0111] This structure breaks with convention by integrating both into the same piping system. The control system monitors the pressure within the filter chamber in real time and dynamically controls the opening and closing of the positive pressure valve and the exhaust valve based on feedback signals. This achieves staggered operation of positive pressure supply and exhaust functions over time, while the physical path is guided by a three-way structure to avoid mutual interference.

[0112] The "one pipe for two purposes" structure not only simplifies the system piping layout, reduces the number of components and space occupation, and improves the control response speed, but also effectively reduces manufacturing and maintenance costs, while improving gas emission efficiency and pressure control accuracy.

[0113] By integrating the positive pressure port and the exhaust port, the system has the following advantages: (1) improved filtration efficiency and filtration stability; (2) extended filter tube service life; (3) reduced system complexity and maintenance costs; (4) achieved high-precision closed-loop control of pressure in the filter chamber; (5) optimized gas emission path and efficiency, and reduced gas resistance and microbubble effects; and (6) improved system operation safety and automation level.

[0114] Example 8

[0115] In this embodiment, the side wall of the sludge collection chamber 1 is provided with a reflux port, which is connected to the feed port or the source liquid tank through a reflux pipe, and a regulating valve is provided on the reflux pipe.

[0116] The return port is connected to the feed port through a return pipe, which directly returns the incompletely filtered medium in the collection chamber to the feed port, allowing it to enter the filter assembly for secondary filtration. This improves the utilization rate of raw materials, reduces the discharge of filter residue, optimizes the filtration effect, and shortens the circulation path to improve filtration efficiency.

[0117] The return port can also be connected to the original liquid tank via a return pipe, allowing the incompletely filtered medium to flow back to the original liquid tank, mix with the original medium, and then re-enter the filtration process to balance the medium concentration and extend the overall filtration cycle.

[0118] The reflux port can also be connected to the feed port and the source liquid tank respectively through a three-way valve, so as to realize flexible switching of the reflux path and meet the needs of different scenarios.

[0119] A reflux port is installed on the side wall of the sludge collection chamber, which is connected to the feed inlet or source liquid tank via a reflux pipe. This enables secondary filtration of substandard liquids, improving filtration efficiency, reducing waste liquid discharge, and saving resources. It addresses the problem of existing filtration systems lacking an effective reflux mechanism, resulting in the direct discharge of substandard filtrate, causing resource waste and burdening subsequent treatment.

[0120] Example 9

[0121] In this embodiment, the discharge multi-element chamber 6 is sealed and connected to the top flange structure of the filter chamber 2 via its bottom flange structure, forming a separable connection. The sealing connection is achieved by setting wear-resistant and media corrosion-resistant gaskets (such as nitrile rubber gaskets, polytetrafluoroethylene gaskets, etc.) on the flange contact surface and tightening them with evenly distributed bolts. This effectively prevents unfiltered materials from leaking and mixing into the filtered materials, ensuring the integrity of the filtration process and ensuring that the filtration accuracy is not affected by leakage.

[0122] This detachable connection enables the separation of the discharge chamber and the filter chamber. After separation, the filter tube support plate can be lifted, and the polymer composite filter tube assembly fixed on the support plate can be removed as a whole for replacement with filter components of different specifications and functions to meet different filtration requirements or for maintenance.

[0123] For example, the filter tube support plate on the top flange face of filter chamber 2 has an annular flange on its outer periphery. The diameter of the flange is slightly smaller than the inner diameter of the top flange of filter chamber 2 (dynamic fit). Sealing rings are provided on both the upper and lower surfaces of the flange. When the flange bolts are tightened, the filter tube support plate is axially fixed, and the sealing rings and flange face form a double seal.

[0124] Loosen the flange bolts to open the multi-component discharge chamber 6. The operator can then vertically lift the filter tube support plate 5 and remove the polymer composite assembly fixed on it from the filter chamber for replacement or maintenance. During installation, the filter tube support plate 5 with the filter tube assembly is inserted axially into the filter chamber 2, ensuring that the flange is aligned with the inner diameter of the flange, and the flange bolts are retightened to the specified torque.

[0125] The discharge chamber and the filtration chamber are designed with a flange structure, making them detachable. This allows the filter tube support plate and filter tube assembly to be removed as a whole, greatly improving the convenience of filter tube replacement and cleaning, and reducing maintenance difficulty and downtime. This solves the problems of complex installation, difficult replacement, and high maintenance costs associated with traditional filter tube assemblies.

[0126] Example 10

[0127] In this embodiment, a drain port is provided at the bottom of the sludge collection chamber 1, and a drain valve N3 is installed at the drain port. The sludge collection chamber 1 is equipped with a liquid level sensor and a media composition detector, which are used to monitor the amount of filter cake accumulation and residual media parameters in real time, respectively. When the liquid level sensor detects that the amount of filter cake accumulation reaches a preset threshold, or the media composition detector determines that the residual media does not meet the requirements for secondary filtration, the PLC control system receives the sensor signal and automatically opens the drain valve, allowing the filter cake and residual media to drain through the drain port. This draining mechanism effectively maintains the filtration accuracy designed for the system by dynamically removing filter cake and unqualified media, avoiding filtration performance degradation due to impurity accumulation or media deterioration, effectively maintaining the capacity of the sludge collection chamber, and ensuring the stable operation of the filtration system.

[0128] Filter workflow:

[0129] 1. Venting: Open the filter feed valve and the vent valve to vent the feed.

[0130] 2. Filtration (Concentration): When the raw liquid enters the filter venting position, close the exhaust valve and open the discharge branch valve and the clear liquid main valve to filter or concentrate the material.

[0131] 3. Backflushing: After the slurry in the equipment has been concentrated to a certain extent, close the branch pipe of the discharge valve in sequence and switch the corresponding backflushing valve to backflush and regenerate the filter tube.

[0132] 4. Backwash: After backflushing, backwash the filter tube with clean water to achieve deep cleaning of the filter tube.

[0133] 5. Slurry discharge: After filtering a certain amount of filtrate or concentrating the material to a certain concentration, use compressed gas to discharge the concentrated liquid in the equipment into the slag receiving tank.

[0134] 6. Regeneration: After the slurry is discharged, a chemical regeneration solution is introduced to soak the filter tubes for a certain period of time to achieve chemical regeneration of the filter tubes.

[0135] 7. Reflux: After the filter tube has undergone chemical regeneration, compressed air is introduced to return the regenerated liquid to the regeneration tank.

Claims

1. A high-efficiency precision microporous filter, characterized in that, It includes a shell, a dirt collection chamber (1), a filter chamber (2), a discharge multi-element chamber (6), a polymer composite filter tube assembly, a discharge branch pipe (7), and a discharge main pipe (3); The sludge collection chamber (1) is located at the lower part of the shell and has an inverted cone shape. A sludge outlet is provided at the bottom of the chamber, and a sludge valve (N3) is provided at the sludge outlet. The filter chamber (2) is located above the dirt collection chamber (1), and is a cylindrical cavity that is integrally connected with the dirt collection chamber (1); a filter tube support plate is provided on the flange surface at the top of the cavity. The polymer composite filter tube assembly consists of multiple suspended polymer composite microporous filter tubes (4). The upper ends of these filter tubes are fixed and pass through the filter tube support plate, and the lower ends extend to the bottom of the filter chamber (2). The discharge multi-cavity (6) is located on the upper part of the shell, above the support plate, and is divided into N+1 independent unit cavities by N guide plates (9). Each unit cavity is connected to the upper outlet of the filter tube in the corresponding area on the filter tube support plate, and each unit cavity is connected to a discharge branch pipe (7). The discharge branch pipe (7) is connected to the discharge main pipe (3), and the discharge main pipe (3) is provided with a discharge port. Pressure sensors are installed on each discharge branch pipe, and the filter tubes are flushed in stages by adjusting the valve opening of each discharge branch pipe.

2. The high-efficiency precision microporous filter according to claim 1, characterized in that, The polymer composite microporous filter tube (4) consists of a PTFE microporous membrane layer, a PA66 support mesh layer and a PEEK protective sleeve layer from the inside out. The three layers are thermally melted to form an integral structure.

3. The high-efficiency precision microporous filter according to claim 1, characterized in that, The discharge manifold (3) is equipped with a backflush port.

4. The high-efficiency precision microporous filter according to claim 1, characterized in that, The discharge main pipe (3) is provided with a backwash port, which is located at the end away from the discharge port.

5. The high-efficiency precision microporous filter according to claim 1, characterized in that, It also includes a chemical regeneration port and a regeneration circulation port; the regeneration port is located on the side wall pipe of the sludge collection chamber (1); the regeneration circulation port is located on the discharge main pipe (3).

6. The high-efficiency precision microporous filter according to claim 1, characterized in that, It also includes a differential pressure controller, which is connected between the filter chamber (2) and the discharge main pipe (3) to monitor the pressure difference between the filter chamber and the discharge main pipe.

7. The high-efficiency precision microporous filter according to claim 1, characterized in that, It is also provided with a positive pressure port and an exhaust port, wherein the exhaust port is opened on the positive pressure port pipe on the upper side wall of the filter chamber (2).

8. The high-efficiency precision microporous filter according to claim 1, characterized in that, The side wall of the sludge collection chamber (1) is also provided with a return port, which is connected to the feed port or the source liquid tank through a return pipe, and a valve is provided on the return pipe.

9. The high-efficiency precision microporous filter according to any one of claims 1 to 8, characterized in that, The discharge multi-element cavity (6) can be detachably connected to the top flange structure of the filter cavity (2) through its bottom flange structure. After separation, the filter tube support plate and the polymer composite filter tube assembly fixed thereon can be taken out as a whole.

10. The high-efficiency precision microporous filter according to claim 9, characterized in that, The flange structure is connected by circumferentially distributed bolts, and the mating surface is provided with sealing gaskets.

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