A fiber filtration device for purifying water supply

Abstract

This utility model belongs to the field of water purification technology and discloses a fiber filtration device for purifying water supply. It includes a water purification pipeline and at least three interconnected short pipes installed sequentially along the water flow direction via flanges. Each of the three short pipes contains an independently filled fiber filtration unit, which includes a low-density coarse fiber winding layer in the inlet section, a medium-density elastic fiber ball layer in the pathway section, and a high-density fine fiber bundle layer in the outlet section. This utility model achieves graded impurity retention through the pore and density gradients of the three-stage filter layers. The coarse fiber layer preferentially intercepts large particles, protecting the downstream filter layer; the elastic fiber ball layer adsorbs medium-sized particles and buffers water flow impact; and the fine fiber bundle layer performs deep filtration. This significantly improves the dirt-holding capacity and filtration accuracy while reducing the load on a single layer, thus extending its overall service life.

Description

Technical Field

[0001] This utility model relates to the field of water purification technology, and in particular to a fiber filtration device for purifying water supply. Background Technology

[0002] In the field of water purification, fiber filtration devices are widely used due to their advantages such as high filtration accuracy, large dirt holding capacity, and easy cleaning. Common fiber filtration devices usually use fiber filter media of a single material and the same density (such as fiber balls or fiber bundles) to fill the filter pipeline. When water flows through, it mainly relies on the overall pores of the filter media layer for interception and filtration.

[0003] However, existing technologies suffer from the problem of uniform filtration precision. Specifically, due to the uniform density and structure of the filter media, the entire filter layer has a basically consistent ability to retain impurities, making it impossible to achieve gradient filtration or fine-level filtration. Therefore, we propose a fiber filtration device for purifying water supply. Utility Model Content

[0004] In view of the problem that the existing fiber filtration devices for water purification have limited filtration accuracy, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A fiber filter device for purifying water supply includes a water supply purification pipeline and at least three connecting short pipes that are sequentially installed on the water supply purification pipeline through a flange and connected in the direction of water flow. Each of the three connecting short pipes is equipped with an independently filled fiber filter unit in sequence along the water flow direction. The fiber filter unit includes a low-density coarse fiber winding layer in the water inlet section, a medium-density elastic fiber ball layer in the flow path section, and a high-density fine fiber bundle layer in the water outlet section.

[0006] As a technical solution of the fiber filtration device for purifying water supply according to the present invention, the coarse fiber winding layer is formed by irregular winding of hydrophobic polypropylene fibers, and the filling density of the coarse fiber winding layer is 80-120 kg / m³, and the average pore diameter is greater than 100 micrometers.

[0007] As a technical solution of the fiber filtration device for purifying water supply according to the present invention, the elastic fiber ball layer is filled with fluffy elastic fiber balls made of hydrophilic modified polyester fiber, and the filling density of the elastic fiber ball layer is 150-220 kg / m³, and the average pore diameter is 20-50 micrometers.

[0008] As a technical solution of the fiber filtration device for purifying water supply described in this utility model, the elastic fiber ball layer is a suspended filling type, which is limited by the limiting ring inside the connecting short pipe and is not tightly compacted.

[0009] As a technical solution of the fiber filtration device for purifying water supply described in this utility model, the fine fiber bundle layer is made by tightly bundling ultra-fine fiber bundles into a bundle and then suspending it in the connecting short pipe, and the rear end of the ultra-fine fiber bundle swings freely, with a filling density of 250-350 kg / m³.

[0010] As a technical solution of the fiber filtration device for purifying water supply described in this utility model, the diameter of the ultrafine fiber bundle is less than 5 micrometers.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model achieves graded impurity interception through the pore gradient and density gradient of three-stage filter layers. The coarse fiber layer preferentially intercepts large particles and protects the downstream filter layer, the elastic fiber ball layer adsorbs medium particles and buffers the impact of water flow, and the fine fiber bundle layer completes deep filtration. This can significantly improve the dirt holding capacity and filtration accuracy, and also reduce the load on a single layer to extend its overall service life.

[0012] 2. This utility model reduces caking by using the hydrophobic material of the coarse fiber layer, avoids compaction by using the suspended filling of the elastic fiber ball layer, and enhances the self-cleaning ability by allowing the fine fiber bundles to swing freely. The three work together to reduce the risk of clogging. In addition, the connecting short pipe with flange connection supports segmented disassembly, which can be used to clean or replace the failed filter layer in a targeted manner, thus greatly simplifying the maintenance process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the water supply purification pipeline and the connecting short pipe separation structure of this utility model.

[0014] Figure 2 This is a cross-sectional schematic diagram of the coarse fiber winding layer inside the connecting short tube of this utility model.

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the elastic fiber ball layer inside the connecting short tube of this utility model.

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the fine fiber bundle layer inside the connecting short tube of this utility model.

[0017] Explanation of reference numerals in the attached figures: In the diagram: 1. Water supply and purification pipeline; 2. Connecting short pipe; 301. Coarse fiber winding layer; 302. Elastic fiber ball layer; 303. Fine fiber bundle layer. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Reference Figures 1-4 A fiber filtration device for purifying water supply is provided. This fiber filtration device for purifying water supply includes a water supply purification pipeline 1. The water supply purification pipeline 1 is provided with a reverse inlet valve and a drain valve at the end of the pipeline. During backwashing, the water flows from bottom to top, loosening the filter media and discharging the dirt. It also includes at least three connecting short pipes 2 that are installed sequentially and connected to the water supply purification pipeline 1 through a flange and along the water flow direction. The inner wall of the connecting short pipes 2 is provided with a limiting ring (for fixing the height of the elastic fiber ball layer 302) and a suspension ring (for fixing the fine fiber bundle). A pressure-resistant sealing gasket can be installed at the flange interface to prevent leakage. Three connecting short pipes 2 are sequentially equipped with independently filled fiber filter units along the water flow direction. The fiber filter unit includes a low-density coarse fiber winding layer 301 in the inlet section, a medium-density elastic fiber ball layer 302 in the pathway section, and a high-density fine fiber bundle layer 303 in the outlet section. In application, the three-stage series structure of coarse fiber winding layer 301 (low density), elastic fiber ball layer 302 (medium density), and fine fiber bundle layer 303 (high density) achieves progressive filtration from coarse to fine filtration, effectively intercepting impurities of different particle sizes (such as large suspended solids, colloids, and microorganisms) to improve overall filtration accuracy and dirt holding capacity. Combined with the modular installation design, the connecting short pipes 2 are connected by flanges, which facilitates segmented maintenance or replacement of specific filter units to reduce operation and maintenance costs.

[0020] Reference Figure 1 and Figure 2 The coarse fiber winding layer 301 is formed by irregular winding of hydrophobic polypropylene fibers, and the filling density of the coarse fiber winding layer 301 is 80-120 kg / m³, with an average pore diameter greater than 100 micrometers. In application, the coarse fiber winding layer 301 (pores > 100 μm) formed by hydrophobic polypropylene fibers can quickly intercept large particulate impurities. Its irregular winding structure enhances water flow disturbance, reduces the risk of filter layer caking, and extends the cleaning cycle.

[0021] Reference Figure 1 and Figure 3The elastic fiber ball layer 302 is filled with fluffy elastic fiber balls made of hydrophilic modified polyester fibers. The filling density of the elastic fiber ball layer 302 is 150-220 kg / m³, and the average pore diameter is 20-50 micrometers. The elastic fiber ball layer 302 is a suspended filling type, which is limited by the limiting ring inside the connecting short tube 2 and is not tightly compacted. In application, the hydrophilic modified polyester fiber balls (pore size 20-50 μm) form an elastic filter layer through fluffy filling and suspension limiting design. It can dynamically adsorb medium particulate pollutants under the impact of water flow. At the same time, the fiber balls are elastically stretched during backwashing and easily return to their initial state, reducing residual dirt. Combined with the anti-compaction design, the limiting ring controls the looseness of the filling and avoids the decrease in porosity of the elastic fiber ball layer 302 due to compaction, thus maintaining stable filtration efficiency.

[0022] Reference Figure 1 and Figure 4 The fine fiber bundle layer 303 is made of ultra-fine fiber bundles tightly bundled together and suspended in the connecting short tube 2. The rear end of the ultra-fine fiber bundles swings freely. The filling density is 250-350 kg / m³, and the diameter of the ultra-fine fiber bundles is less than 5 micrometers. In application, the ultra-fine fiber bundles (diameter <5μm, density 250-350 kg / m³) efficiently trap micron-sized particles through tight bundling and high-density filling. At the same time, the free swing structure at the rear end can disturb the fiber bundles under the action of water flow, automatically peeling off attached pollutants to delay clogging.

[0023] The working principle of this utility model is as follows: Forward filtration and purification stage: First, the raw water enters the first-stage connecting short pipe 2. At this time, the coarse fiber winding layer 301 intercepts suspended matter larger than 100μm (such as silt and algae). The hydrophobic material reduces the adhesion of organic matter. Then, the water flows through the second-stage elastic fiber ball layer 302. The hydrophilic fibers adsorb colloids and particles of 20-50μm. At the same time, the suspended filling design allows the fiber balls to roll slightly in the water flow, enhancing the interception capacity. Finally, it passes through the third-stage fine fiber bundle layer 303. The ultra-fine fiber bundles (less than 5μm) deeply intercept micron-sized particles and bacteria. At the same time, the free swing of the fiber bundles generates micro-disturbances to prevent pollutants from quickly clogging the pores. Backwashing regeneration stage: First, close the raw water inlet valve and open the drain valve and reverse inlet valve on the water supply purification pipeline 1. During this period, the third-stage high-pressure backwash water flow causes the fine fiber bundle layer 303 to swing and peel off the attached pollutants. The second-stage water flow impacts the elastic fiber ball layer 302, causing it to stretch and bounce, releasing the trapped impurities. The first-stage coarse fiber winding layer 301 is loosened under the reverse water flow, and large particles of dirt are flushed out. Finally, the dirt is discharged from the drain valve with the water flow until the effluent is clear and then the backwash system is closed.

[0024] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fiber filtration device for purifying water supply, comprising a water supply purification pipeline (1), characterized in that: It also includes at least three connecting short pipes (2) that are installed sequentially on the water supply and purification pipeline (1) via flanges and connected in the direction of water flow. Each of the three connecting short pipes (2) is equipped with an independently filled fiber filter unit in sequence along the water flow direction. The fiber filter unit includes a low-density coarse fiber winding layer (301) in the water inlet section, a medium-density elastic fiber ball layer (302) in the flow path section, and a high-density fine fiber bundle layer (303) in the water outlet section.

2. The fiber filtration device for purifying water supply according to claim 1, characterized in that: The coarse fiber winding layer (301) is formed by irregular winding of hydrophobic polypropylene fibers, and the filling density of the coarse fiber winding layer (301) is 80-120 kg / m³, with an average pore diameter greater than 100 micrometers.

3. The fiber filtration device for purifying water supply according to claim 1, characterized in that: The elastic fiber ball layer (302) is filled with fluffy elastic fiber balls made of hydrophilic modified polyester fibers, and the filling density of the elastic fiber ball layer (302) is 150-220 kg / m³, with an average pore diameter of 20-50 micrometers.

4. The fiber filtration device for purifying water supply according to claim 3, characterized in that: The elastic fiber ball layer (302) is a suspended filling type, which is limited by the limiting ring inside the connecting short tube (2) and is not tightly compacted.

5. The fiber filtration device for purifying water supply according to claim 1, characterized in that: The fine fiber bundle layer (303) is made by tightly bundling ultrafine fiber bundles and then suspending them inside the connecting short tube (2). The rear end of the ultrafine fiber bundles swings freely, and the filling density is 250-350 kg / m³.

6. The fiber filtration device for purifying water supply according to claim 5, characterized in that: The diameter of the ultrafine fiber bundle is less than 5 micrometers.

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