Water treatment filter element

Abstract

The invention provides a water treatment filter element, which comprises: a tubular main body, the side wall of which is provided with an interlayer structure; the interlayer structure is filled with the water treatment medium; the central flow channel is defined by the inner wall of the tubular main body; the water inlet channel is arranged on the tubular main body on the outer side of the interlayer structure; the water outlet channel is communicated with the two ends of the central flow channel; wherein to-be-treated liquid is discharged from the water outlet channel after sequentially passing through the tubular main body water inlet channel, the water treatment medium in the interlayer structure and the central flow channel; through the synergistic effect of the innovative interlayer structure and the center flow channel, low pressure loss is kept, meanwhile, the contact time of a water treatment medium is prolonged, and the problem of structural vulnerability is solved through mechanical supporting of the tubular main body.

Description

Technical Field

[0001] The present invention relates to the technical field of filter elements, and particularly to a water treatment filter element. Background Art

[0002] The traditional water treatment filter elements mainly have the following technical limitations:

[0003] 1. Design defect of one-way flow channel: Most filter elements adopt a single-layer filtration structure (such as PP cotton, activated carbon rod), with a short water flow path and insufficient contact time, resulting in a low pollutant interception rate (especially for micron-sized particles and dissolved organic matter).

[0004] 2. Low medium utilization rate: The medium distribution of the packed filter element is uneven, and the central area is easily blocked while the edge area does not fully participate in filtration, causing material waste (industry statistics show that the effective utilization rate of the medium is less than 60%).

[0005] 3. Structural strength problem: The existing composite filter element realizes multi-functional filtration by bonding multiple filter materials, but the interface between layers is prone to cracking under high pressure (commonly found in working conditions > 0.6 MPa), leading to a risk of water leakage.

[0006] In response to the above problems, the spiral flow channel filter element proposed by the prior art, although it prolongs the contact time, results in an increase in pressure loss of more than 35%; the hollow fiber bundle design adopted by the prior art, although it increases the specific surface area, generates secondary pollution due to fiber breakage.

[0007] The disclosure of the above background art content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application, nor will it necessarily give technical guidance; in the absence of clear evidence that the above content was publicly available before the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0008] In order to solve the technical problems such as the design defect of the one-way flow channel, low medium utilization rate, and structural strength in the prior art, the present invention proposes a water treatment filter element, which through the synergistic effect of an innovative sandwich structure and a central flow channel, while maintaining a low pressure loss, improves the contact time of the water treatment medium, and solves the problem of structural fragility through the mechanical support of the tubular main body.

[0009] To achieve the above object, the technical solution of the present invention is as follows:

[0010] On the one hand, the present invention provides a water treatment filter element, comprising:

[0011] A tubular main body, the side wall of which is provided with a sandwich structure;

[0012] A water treatment medium, which is filled in the sandwich structure;

[0013] A central flow channel, formed by enclosing with the inner wall of the tubular body;

[0014] An inlet channel, provided on the side wall of the tubular body outside the sandwich structure;

[0015] An outlet channel, communicating with both ends of the central flow channel; wherein, the liquid to be treated is discharged from the outlet channel after passing through the inlet channel of the tubular body, the water treatment medium in the sandwich structure, and the central flow channel in sequence.

[0016] The present invention provides a water treatment filter element, which, through the synergistic action of an innovative sandwich structure and a central flow channel, while maintaining a low pressure loss, improves the contact time of the water treatment medium, and solves the problem of structural fragility through the mechanical support of the tubular body.

[0017] As a preferred technical solution, the sandwich structure is an annular cavity, and the inlet channel includes a plurality of micropores provided on the outer wall of the tubular body.

[0018] As a preferred technical solution, the radial cross-sectional area of the central flow channel is smaller than the radial cross-sectional area of the sandwich structure.

[0019] As a preferred technical solution, detachable end caps are provided at both ends of the tubular body.

[0020] As a preferred technical solution, the end cap includes: an end cap end face, and an uneven structure is provided on the contact surface between the end cap end face and the end of the tubular body, and the protruding part of the uneven structure is in close contact with the end of the tubular body.

[0021] As a preferred technical solution, a clamping portion is provided on the outer circumference of the end cap end face, and the end cap is clamped to the tubular body through the clamping portion.

[0022] As a preferred technical solution, the end cap end face protrudes towards the direction close to the inner cavity of the tubular body to form a diversion channel, and the end cap end face protrudes towards the direction away from the inner cavity of the tubular body to form an annular member, and the radial cross-sectional area of the annular member is larger than the cross-sectional area of the diversion channel.

[0023] As a preferred technical solution, the end cap includes: a first end cap and a second end cap, the outlet channel at one end of the inner cavity of the tubular body is communicated with the inner cavity of the first end cap through the diversion channel, and the outlet channel at the other end of the inner cavity of the tubular body is communicated with the inner cavity of the second end cap through the diversion channel.

[0024] As a preferred technical solution, the radial cross-sectional area of the diversion channel is smaller than the radial cross-sectional area of the central flow channel.

[0025] As a preferred technical solution, the water treatment medium comprises metal copper particles or copper alloy particles, which have an active surface reactive with hydrogen sulfide, and the filling rate of the metal copper particles or copper alloy particles filled in the sandwich structure is > 90 vol%.

[0026] The water treatment filter element provided by the present invention has the following beneficial effects:

[0027] 1) The water treatment filter element provided by the present invention, through the synergistic effect of the innovative sandwich structure and the central flow channel, while maintaining a low pressure loss, improves the contact time of the water treatment medium, and solves the problem of structural fragility through the mechanical support of the tubular body;

[0028] 2) In the water treatment filter element provided by the present invention, water flows radially through the water treatment medium in the sandwich structure from the inlet channel. Compared with the traditional axial flow, the diffusion distance is shortened but the contact area is increased (circumferential expansion effect of the sandwich structure), so that the contact time of the water treatment medium is improved;

[0029] Micro-turbulence is generated when water flows through the porous medium of the tubular body, the collision probability of pollutants is increased, and the removal rate of harmful substances and pollutants in water is improved;

[0030] The water outlet channels at both ends of the tubular body form pressure balance, avoiding the problem of uneven flow caused by single-side water outlet (solving the eddy current defect of threaded connection filter elements), and reducing the pressure loss of the central flow channel

[0031] The sandwich structure and the central flow channel form a "sandwich" load-bearing framework, and the burst pressure > 1.2 MPa, so that the stress is dispersed, the mechanical strength of the tubular body is enhanced, and the service life of the water treatment filter element is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a water treatment filter element provided by the present invention;

[0033] Figure 2 is a schematic structural diagram of another perspective of a water treatment filter element provided by the present invention;

[0034] Figure 3 is a schematic structural diagram of another perspective of a water treatment filter element provided by the present invention;

[0035] Figure 4 is a top view of a water treatment filter element provided by the present invention;

[0036] Figure 5 is Figure 4 a cross-sectional view taken along the line A-A of

[0037] Among them, 1 - tubular body; 2 - sandwich structure; 3 - water treatment medium; 4 - central flow channel; 5 - water outlet channel; 6 - end cap; 61 - first end cap; 62 - second end cap; 7 - end cap end face; 8 - concave-convex structure; 9 - convex part; 10 - clamping part; 11 - diversion channel; 12 - ring-shaped part. Specific embodiments

[0038] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] As Figures 1-5 shown, the present invention provides a water treatment filter element, comprising:

[0040] A tubular body 1, the side wall of which is provided with a sandwich structure 2;

[0041] A water treatment medium 3, which is filled in the sandwich structure 2;

[0042] A central flow channel 4, which is formed by enclosing the inner wall of the tubular body 1;

[0043] An inlet channel (not shown), which is arranged on the side wall of the tubular body 1 outside the sandwich structure 2;

[0044] A water outlet channel 5, which is communicated with both ends of the central flow channel 4; wherein, the liquid to be treated sequentially passes through the inlet channel (not shown) of the tubular body 1, the water treatment medium 3 in the sandwich structure 2 and the central flow channel 4 and then is discharged from the water outlet channel.

[0045] The present invention provides a water treatment filter element, through the synergistic effect of the innovative sandwich structure and the central flow channel, while maintaining a low pressure loss, the contact time of the water treatment medium is increased, and the problem of structural fragility is solved by the mechanical support of the tubular body.

[0046] Preferably, as Figure 5As shown, the sandwich structure 2 is an annular cavity, and the water inlet channel (not shown) includes a plurality of micropores (not shown) provided on the outer wall of the tubular body 1; the micropores of the water inlet channel on the side wall of the tubular body 1 disperse the incoming water into multiple thin streams, and through the multiple micropores, the water flow is evenly diffused circumferentially in the annular cavity of the sandwich structure 2, avoiding local medium erosion or blockage caused by traditional single-point water inlet; the tubular body 1 is preferably an activated carbon rod, and the activated carbon rod itself serves as a porous medium, adsorbing and removing dissolved organic matter and odor molecules through pores. At the same time, the tubular structure forms a physical filtration barrier to intercept particles ≥5μm. The geometric design of the annular cavity enables the water flow to form a mixed flow state of laminar flow and micro-turbulence when passing through the water treatment medium in the sandwich structure 2 radially. Compared with the traditional axial flow channel, the effective contact time between harmful substances and pollutants in the water and the water treatment medium 3 is fully extended; the annular cavity of the sandwich structure 3 and the central flow channel 4 form an "outer expansion - inner contraction" dual-channel pressure compensation system, and the measured burst pressure > 1.5 MPa, improving the structural strength and stability. This design, through the discrete water inlet of the micropores on the outer wall of the tubular body 1, the adsorption and filtration of harmful substances in the annular cavity of the sandwich structure 3, and the confluence of the central flow channel 4, is compatible with high-pressure tolerance and low-pressure loss characteristics, and simultaneously realizes the synergistic optimization of filtration efficiency and medium life.

[0047] Preferably, as Figure 5 shown, the radial cross-sectional area of the central flow channel 4 is smaller than that of the sandwich structure 2; the reduction in the cross-sectional area of the central flow channel 4 forms a fluid acceleration zone, creating a velocity gradient with the low-speed penetration zone of the sandwich structure 2, significantly reducing the pressure loss; the cross-sectional area difference builds a dynamic pressure balance between the sandwich structure 2 and the central flow channel 4, suppressing the crossflow through the radial flow channel and achieving circumferentially uniform flow; the cross-sectional area contraction triggers a fluid shear effect, forming micro-scale turbulence in the pores of the water treatment medium 3 in the sandwich structure 2, breaking the boundary layer limitation, and improving the removal rate of harmful substances in the water.

[0048] Preferably, as Figures 1-5 shown, both ends of the tubular body 1 are provided with detachable end caps 6, and the setting of the end caps 6 facilitates the connection between the water treatment filter element and the filtration device (not shown).

[0049] Preferably, as Figure 5 shown, the end cap 6 includes: an end cap end face 7, and the contact surface between the end cap end face 7 and the end of the tubular body 1 is provided with a concavo-convex structure 8, and the protruding part 9 of the concavo-convex structure 8 is in close contact with the end of the tubular body 1;

[0050] The concavo-convex structure 8 decomposes the axial pressing force into a stepped distributed load, reducing the stress deviation of the end face of the tubular body 1 and avoiding the risk of local rupture;

[0051] The convex portion 9 of the concave-convex structure 8 forms a local high-pressure contact area with the end face of the tubular main body 1, effectively blocking the fluid bypass path and greatly reducing the leakage rate.

[0052] Preferably, as Figure 5 shown, a clamping portion 10 is provided circumferentially on the outer periphery of the end face 7 of the end cap. The end cap 6 is clamped to the tubular main body 1 through the clamping portion 10; an interference fit is formed between the clamping portion 10 and the outer wall of the tubular main body 1, effectively blocking the bypass channel of the untreated water along the pipe wall gap and improving the filtration efficiency; a deformation allowance is reserved between the clamping portion 10 and the side wall of the tubular main body 1, which can absorb the volume change caused by the water absorption and expansion of the tubular main body 1 and avoid seal failure caused by expansion.

[0053] Preferably, as Figure 5 shown, the end face 7 of the end cap bulges towards the direction close to the inner cavity of the tubular main body 1 to form a diversion channel 11, and the end face 7 of the end cap bulges towards the direction away from the inner cavity of the tubular main body 1 to form an annular member 12. The radial cross-sectional area of the annular member 12 is larger than the radial cross-sectional area of the diversion channel 11;

[0054] The bulge towards the tubular main body 1 forms a tapered diversion channel 11, which increases the water flow velocity and enhances the scouring efficiency of pollutants in the pores of the water inlet channel of the tubular main body 1;

[0055] The cross-sectional area of the annular member 12 away from the tubular main body 1 expands to form a buffer cavity, which can reduce the amplitude of the flow velocity fluctuation, avoid the impact of water flow pulsation on the tubular main body 1, reduce the risk of axial crushing of the tubular main body 1, and extend the service life of the tubular main body 1;

[0056] The cross-sectional area difference between the diversion channel 11 and the annular member 12 forms a stepped pressure difference, which improves the uniformity of the axial pressure distribution of the tubular main body 1 and avoids the filtration blind area caused by the local infiltration rate difference.

[0057] Preferably, as Figures 1-5 shown, the end cap 6 includes: a first end cap 61 and a second end cap 62. The water outlet channel 5 at one end of the inner cavity of the tubular main body 1 is communicated with the inner cavity of the first end cap 61 through the diversion channel 11, and the water outlet channel 5 at the other end of the inner cavity of the tubular main body 1 is communicated with the inner cavity of the second end cap 62 through the diversion channel 11;

[0058] The symmetric diversion channels 11 of the first end cap 61 and the second end cap 62 form a two-way flow path, which reduces the flow velocity deviation rate in the inner cavity of the tubular main body 1 and the turbulent kinetic energy, and avoids the wear of the tubular main body 1 caused by local scouring;

[0059] The diversion channels 11 at both ends form a stepped pressure difference, which improves the uniformity of the axial pressure distribution and ensures the maximum utilization rate of the pores of the water inlet channel (not shown) on the side wall of the tubular main body 1.

[0060] Preferably, as Figure 5 shown, the radial cross-sectional area of the diversion channel 11 is smaller than the cross-sectional area of the central flow channel 4;

[0061] The reduction in cross-sectional area forms a Venturi effect, which increases the flow velocity. The area where the flow velocity increases forms a local vacuum, promoting the penetration and adsorption of harmful substances and pollutants in water into the pores of the water inlet channel on the side wall of the tubular body 1; the pressure gradient formed by the cross-sectional area difference compensates for the frictional loss of the tubular body 1, reducing the axial pressure difference of the tubular body 1 and avoiding local penetration failure.

[0062] Preferably, as Figure 5 shown, the water treatment medium 3 contains metal copper particles or copper alloy particles and has an active surface for reacting with hydrogen sulfide. The filling rate of the metal copper particles or copper alloy particles in the sandwich structure is > 90 vol%;

[0063] An electrochemical reaction occurs on the surface of the copper particles with hydrogen sulfide:

[0064] Cu + H2S → CuS + H2↑

[0065] The hydrogen sulfide removal rate can reach 98%, and the reaction product copper sulfide forms a stable precipitate;

[0066] Electrochemically active sites are formed at the microcrystalline boundaries of the copper alloy, increasing the decomposition rate of H2S to 5.7 g / (m 2 ·h);

[0067] The filling rate > 90 vol% forms a dense particle water treatment medium 3 layer, and the shear force of the water flow continuously exposes the fresh copper surface, keeping the reaction activity > 85% of the initial value, and improving the ability to continuously remove H2S in water;

[0068] The filling density of the metal copper particles or copper alloy particles > 90 vol% makes the porosity of the water treatment medium 3 layer < 8%, reducing the deformation caused by water flow impact by 72%, and achieving a dynamic balance between filtration accuracy and operating cost.

[0069] As Figures 1-5As shown, the present invention provides a water treatment filter element, comprising: a tubular main body 1, the side wall of which is provided with a sandwich structure 2; a water treatment medium 3, which is filled in the sandwich structure 2; a central flow channel 4, which is formed by enclosing the inner wall of the tubular main body 1; an inlet channel (not shown), which is arranged on the side wall of the tubular main body 1 outside the sandwich structure 2; an outlet channel 5, which is communicated with both ends of the central flow channel 4; wherein, the liquid to be treated sequentially passes through the inlet channel (not shown) of the tubular main body 1, the water treatment medium 3 in the sandwich structure 2 and the central flow channel 4 and then is discharged from the outlet channel 5; the sandwich structure 2 is an annular cavity, and the inlet channel (not shown) comprises a plurality of micropores arranged on the outer wall of the tubular main body 1; the radial cross-sectional area of the central flow channel 4 is smaller than the radial cross-sectional area of the sandwich structure 2; both ends of the tubular main body 1 are provided with detachable end caps 6; the end cap 6 comprises: an end cap end face 7, the contact surface of the end cap end face 7 and the end of the tubular main body 1 is provided with a concavo-convex structure 8, and the convex part 9 of the concavo-convex structure 8 is in close contact with the end of the tubular main body 1; a clamping part 10 is circumferentially arranged on the outer periphery of the end cap end face 7, and the end cap 6 is clamped with the tubular main body 1 through the clamping part 10; the end cap end face 7 protrudes towards the direction close to the inner cavity of the tubular main body 1 to form a diversion channel 11, and the end cap end face protrudes towards the direction away from the inner cavity of the tubular main body 1 to form an annular part 12, and the radial cross-sectional area of the annular part 12 is larger than the cross-sectional area of the diversion channel 11; the end cap 6 comprises: a first end cap 61 and a second end cap 62, the outlet channel 5 at one end of the inner cavity of the tubular main body 1 is communicated with the inner cavity of the first end cap 61 through the diversion channel 11, and the outlet channel 5 at the other end of the inner cavity of the tubular main body 1 is communicated with the inner cavity of the second end cap 62 through the diversion channel 11; the radial cross-sectional area of the diversion channel 11 is smaller than the cross-sectional area of the central flow channel 4; the water treatment medium 3 is metal copper particles, which have an active surface reacting with hydrogen sulfide, and the filling rate of the metal copper particles filled in the sandwich structure is > 90 vol%; this structure, through the synergistic effect of the innovative sandwich structure and the central flow channel, while maintaining a low pressure loss, improves the contact time of the water treatment medium, and solves the problem of structural fragility through the mechanical support of the tubular main body.

[0070] It is understood that the present invention is described by way of some embodiments. Those skilled in the art will know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. Additionally, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein. All changes or equivalent substitutions that fall within the scope of the claims of this application are included. Additionally, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein. All embodiments that fall within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. A water treatment filter element, characterized in that, Comprising: A tubular body, the side wall of which is provided with a sandwich structure; A water treatment medium, which is filled in the sandwich structure; A central flow channel, formed by enclosing the inner wall of the tubular body; An inlet channel, arranged on the side wall of the tubular body outside the sandwich structure; An outlet channel, communicating with both ends of the central flow channel; wherein, the liquid to be treated is discharged from the outlet channel after passing through the inlet channel of the tubular body, the water treatment medium in the sandwich structure and the central flow channel in sequence.

2. The water treatment filter element according to claim 1, wherein, [[ID=--6]]The sandwich structure is an annular cavity, and the inlet channel includes a plurality of micropores arranged on the outer wall of the tubular body.

3. The water treatment filter element according to claim 1, characterized in that, The radial cross-sectional area of the central flow channel is smaller than the radial cross-sectional area of the sandwich structure.

4. The water treatment filter element according to claim 1, characterized in that, Both ends of the tubular body are provided with detachable end caps.

5. The water treatment filter element according to claim 4, characterized in that, The end cap includes: an end cap end face, the contact surface between the end cap end face and the end of the tubular body is provided with a concave-convex structure, and the convex part of the concave-convex structure is in close contact with the end of the tubular body.

6. The water treatment filter element according to claim 5, characterized in that, A clamping portion is circumferentially arranged on the outer periphery of the end cap end face, and the end cap is clamped with the tubular body through the clamping portion.

7. The water treatment filter element according to claim 5, wherein, The end cap end face protrudes towards the direction close to the tubular body to form a diversion channel, and the end cap end face protrudes towards the direction away from the tubular body to form an annular member, and the radial cross-sectional area of the annular member is larger than the cross-sectional area of the diversion channel.

8. The water treatment filter element according to claim 7, wherein The end cap includes: a first end cap and a second end cap, the outlet channel at one end of the inner cavity of the tubular body is communicated with the inner cavity of the first end cap through a diversion channel, and the outlet channel at the other end of the inner cavity of the tubular body is communicated with the inner cavity of the second end cap through a diversion channel.

9. The water treatment filter element according to claim 8, wherein, The radial cross-sectional area of the diversion channel is smaller than the radial cross-sectional area of the central flow channel.

10. The water treatment filter element according to claim 1, wherein, The water treatment medium contains metal copper particles or copper alloy particles, has an active surface reacting with hydrogen sulfide, and the filling rate of the metal copper particles or copper alloy particles filled in the sandwich structure > 90 vol%.

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