Activated carbon filter element

Abstract

The utility model relates to an activated carbon filter element, and relates to the technical field of filtration. The activated carbon filter element comprises an activated carbon element and a filter cartridge, the filter cartridge comprises an outer shell and an inner shell which are concentrically and relatively fixed, a cavity is formed between the outer shell and the inner shell, the activated carbon element is packaged in the cavity, a plurality of water inlet holes are formed in the periphery of one end of the outer shell, and a water outlet is formed in the end, away from the water inlet holes, of the inner shell. A front PP cotton filter element is arranged at the end, close to the water inlet hole, of the cavity, and a rear PP cotton filter element is arranged at the end, close to the water outlet hole, of the cavity. Water flows into the front PP cotton filter element from the plurality of water inlet holes, large solid impurities in the water are removed by the front PP cotton filter element, then the water flows into the activated carbon core to be in full contact with the activated carbon core for deep filtration, and finally the water flows out after being further filtered by the rear PP cotton filter element. The device is long in filtering time, water makes full contact with activated carbon particles, the utilization efficiency of activated carbon is high, and the filtering effect is good.

Description

Technical Field

[0001] The present application relates to the field of filtration technology, and in particular to an activated carbon filter element. Background Art

[0002] Filter elements are simple devices designed to purify raw fluids and separate resources. They are currently used in filtration industries such as oil, air, and water filtration. Common filter element types include PP, wire-wound, activated carbon, ceramic, and resin. Activated carbon filter elements are made from high-quality nutshell and coal-based activated carbon, supplemented with food-grade adhesives, and processed using high-tech techniques and specialized processes. They integrate adsorption, filtration, interception, and catalysis, effectively removing organic matter, residual chlorine, and other radioactive substances from water, while also providing decolorization and odor removal. They are an ideal replacement product for the liquid and air purification industries.

[0003] Activated carbon filter products mainly include compressed activated carbon filter elements and bulk activated carbon filter elements. Among them, bulk activated carbon filter elements are made by loading the required activated carbon particles into a special plastic shell, welding the end caps to the two end surfaces of the shell with welding equipment, and placing non-woven filter discs at both ends of the shell. During filtration, water enters the filter element from one end of the shell and flows out from the other end. However, this single-channel water flow through the two ends of the filtration method has certain disadvantages. The single-channel water flow often has a high flow rate. The direct passage of the two ends makes the water stay in the activated carbon for a short time, resulting in poor filtration effect. In addition, the water flow will flush the activated carbon particles in the middle of the filter element to the sides, making it difficult for the water to fully contact the activated carbon particles, and the utilization efficiency of the activated carbon is low. Utility Model Content

[0004] In order to solve the problem of poor filtering effect of two-end through-type activated carbon filter elements, the present application provides an activated carbon filter element.

[0005] The activated carbon filter element provided in this application adopts the following technical solution:

[0006] An activated carbon filter element comprises an activated carbon core and a filter cartridge, wherein the filter cartridge comprises an outer shell and an inner shell that are concentrically fixed relative to each other, a cavity is provided between the outer shell and the inner shell, the activated carbon core is encapsulated in the cavity, a plurality of water inlet holes are provided on the outer circumference of one end of the outer shell, and a water outlet is provided on the end of the inner shell away from the water inlet holes.

[0007] By adopting the above technical solution, the activated carbon core is distributed circumferentially in the cavity to facilitate full contact with the water flow. The water flows into the cavity in multiple ways from several water inlet holes on the circumference of the outer shell. The circumferentially distributed water inlet holes allow multiple water flows to contact the activated carbon core from different directions. The water flow is evenly distributed in the circumferential direction of the activated carbon core. The water flow branching slows down the flow rate of the water, and the residence time of the water flow in the activated carbon core becomes longer. The water flow gradually penetrates into the activated carbon core and fully contacts the activated carbon core. Therefore, the water flow can fully contact the activated carbon core, the filtration effect is better, and the utilization efficiency of the activated carbon core is higher.

[0008] Preferably, a front PP cotton filter element is provided at one end of the cavity close to the water inlet hole, the water inlet hole is located at one end of the front PP cotton filter element, and the other end of the front PP cotton filter element blocks one end of the activated carbon core.

[0009] Preferably, a post-PP cotton filter element is provided at one end of the cavity close to the water outlet, the water outlet is located at one end of the post-PP cotton filter element, and the other end of the post-PP cotton filter element blocks one end of the activated carbon core.

[0010] Preferably, there are several water outlets distributed along the circumference of the inner shell.

[0011] Preferably, one end of the outer shell has a bottom seal, and the bottom seal seals the cavity.

[0012] Preferably, one end of the filter cartridge has a loading port for loading the activated carbon core.

[0013] Preferably, the charging port is provided with an end cover, and the end cover is used to seal the charging port.

[0014] Preferably, the activated carbon core is granular activated carbon.

[0015] Preferably, the radius of the outer shell at both ends of the filter cartridge is smaller than the radius of the outer shell in the middle section of the filter cartridge.

[0016] Preferably, sealing rings are provided at both ends of the filter cartridge.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] The filtration time is long, the filtration effect is good, the water flow can fully contact with the activated carbon, and the utilization efficiency of the activated carbon is high;

[0019] High filtration efficiency, wide application environment, using PP cotton-activated carbon-PP cotton three-stage composite filter element, after multi-layer filtration, the water purification effect is good, using PP cotton to pre-remove particulate impurities in the water can increase the service life of the activated carbon core;

[0020] Save space, place the three-stage composite filter element of PP cotton-activated carbon-PP cotton in one filter cartridge, which is easy to install and replace and has low filtration cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the activated carbon filter element in the embodiment of the present application.

[0022] Figure 2 It is a cross-sectional schematic diagram of the activated carbon filter element after the filter element is installed in the embodiment of the present application.

[0023] Figure 3 It is a cross-sectional schematic diagram of an activated carbon filter element in an embodiment of the present application without a filter element installed.

[0024] Figure 4 Schematic diagram of the explosion of the activated carbon filter element in the embodiment of the present application.

[0025] Figure 5 This is another explosion diagram of the activated carbon filter element in the embodiment of the present application.

[0026] Explanation of the accompanying symbols: 1. Activated carbon core; 2. Filter cartridge; 3. Water inlet; 4. Water outlet; 21. Outer shell; 22. Inner shell; 5. Cavity; 211. Bottom seal; 6. Front PP cotton filter element; 7. Rear PP cotton filter element; 8. Loading port; 9. End cover; 23. Annular protrusion; 10. Sealing ring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-5 This application is described in further detail.

[0028] The present application discloses an activated carbon filter element. Figure 1 and Figure 2 The activated carbon filter element includes an activated carbon core 1 and a filter cartridge 2. The activated carbon core 1 is located in the filter cartridge 2. The activated carbon core 1 is preferably granular activated carbon. The filter cartridge 2 is a hollow shell. The activated carbon core 1 is encapsulated in the shell of the filter cartridge 2. Several water inlet holes 3 are provided on the outer circumference of one end of the filter cartridge 2, and a water outlet 4 is provided at the other end of the filter cartridge 2. Water flows into the filter cartridge 2 from the water inlet hole 3 and contacts with the activated carbon core 1. After being filtered by the activated carbon core 1, it flows out from the water outlet 4.

[0029] Reference Figure 1 and Figure 3The filter cartridge 2 includes an outer shell 21 and an inner shell 22 that are concentrically fixed relative to each other. The inner shell 22 is located within the outer shell 21. The inner shell 22 is hollow in the middle. A cavity 5 is defined between the outer shell 21 and the inner shell 22, and the activated carbon core 1 is encapsulated in the cavity 5. The outer shell 21 and the inner shell 22 are relatively fixed. As an implementation method, one end of the outer shell 21 has a bottom seal 211 that seals one end of the cavity 5. The bottom seal 211 is a hollow circle with a hole in the middle. The hole in the bottom seal 211, the hollow portion of the inner shell 22, and the water outlet 4 are connected. The cavity 5 formed by the outer shell 21, the inner shell 22, and the bottom seal 211 is used to contain the activated carbon core 1. As another implementation method, both ends of the outer shell 21 have bottom seals 211 that completely seal the cavity 5. This configuration is usually only applicable during production, when the activated carbon core 1 is completely encapsulated in the cavity 5 using the bottom seal 211 after being filled.

[0030] Reference Figure 3 and Figure 4 The outer shell 21 has a plurality of water inlet holes 3 on its outer circumference at one end. The number of water inlet holes 3 is at least two. As a preferred embodiment, six water inlet holes 3 are arranged circumferentially on one end of the outer shell 21. The circumferential array of multiple water inlet holes 3 allows water to enter the filter cartridge 2 relatively evenly from multiple directions, which is beneficial for subsequent sufficient contact with the activated carbon core 1. The inner circumference of the end of the inner shell 22 away from the water inlet holes 3 has a water outlet 4. There is at least one water outlet 4. As a preferred embodiment, multiple water outlets 4 are provided and arranged circumferentially on the inner wall of the inner shell 22.

[0031] Reference Figure 2 and Figure 3A pre-PP cotton filter element 6 is provided at one end of the cavity 5 near the water inlet 3. The water inlet 3 is located at one end of the pre-PP cotton filter element 6, and the other end of the pre-PP cotton filter element 6 blocks one end of the activated carbon core 1. Within the cavity 5, the pre-PP cotton filter element 6 is in close contact with the inner wall of the outer shell 21 and the outer wall of the inner shell 22, thereby securing the pre-PP cotton filter element 6 relatively within the cavity 5. The pre-PP cotton filter element 6 fits well with the water inlet 3, making it difficult for water entering the cavity 5 through the water inlet 3 to reach the activated carbon core 1 directly without passing through the pre-PP cotton filter element 6. After entering the filter cartridge 2 through the water inlet 3, water first passes through the pre-PP cotton filter element 6, where it undergoes coarse filtration to remove larger solid impurities in the water. The pre-PP cotton filter element 6 also blocks the activated carbon core 1, preventing it from escaping from the water inlet 3 and exiting the cavity 5. Furthermore, a post-PP cotton filter element 7 is provided at one end of the cavity 5 near the water outlet 4. The water outlet 4 is located at one end of the post-PP cotton filter element 7, and the other end of the post-PP cotton filter element 7 blocks one end of the activated carbon core 1. Similarly, the post-PP cotton filter element 7 is in close contact with the inner wall of the outer shell 21 and the outer wall of the inner shell 22. The post-PP cotton filter element 7 is relatively fixed in the cavity 5, and the post-PP cotton filter element 7 and the water outlet 4 have good contact, making it difficult for water to flow out of the cavity 5 directly from the water outlet 4 without passing through the post-PP cotton filter element 7. After being filtered by the activated carbon core 1, the water flows into the post-PP cotton filter element 7. Compared with the front PP cotton filter element 6, the post-PP cotton filter element 7 has a smaller pore size. Therefore, the post-PP cotton filter element 7 can remove smaller particles, suspended matter, and colloids in the water. At the same time, the post-PP cotton filter element 7 prevents the activated carbon core 1 from shedding powder and affecting the water output effect. The front PP cotton filter element 6, the rear PP cotton filter element 7 and the activated carbon core 1 are connected in series to form a three-stage composite filter element of "PP cotton filter element-activated carbon core-PP cotton filter element". The water flow first passes through the front PP cotton filter element 6 for physical filtration to remove large molecular solid particles, and then enters the activated carbon core 1 for deep filtration to remove residual chlorine, chloroform, disinfection by-products and other chemical substances and odors and colors in the water. Finally, it is further filtered through the rear PP cotton filter element 7. The pretreatment of the front PP cotton filter element 6 improves the efficiency of the precision filtration of the activated carbon core 1, and the rear PP cotton filter element 7 hinders the outflow of small particles and activated carbon powder, which improves the water quality. In addition, the three-stage composite filter element is small in size, saves space, and is easy to carry.

[0032] Reference Figure 1 and Figure 4One end of the filter cartridge 2 has a loading port 8, and the activated carbon core 1 is loaded into the cavity 5 through the loading port 8. The loading port 8 can be an opening at one end of the cavity 5. The loading port 8 is preferably arranged at the end close to the water inlet 3. Furthermore, an end cap 9 is provided on the loading port 8, and the end cap 9 is used to seal the loading port 8. When the loading port 8 is an opening at one end of the cavity 5, the end cap 9 seals the opening at one end of the cavity 5. Preferably, one end of the cavity 5 is the loading port 8, and the other end of the cavity 5 is the bottom cover 211. After the activated carbon core 1 is loaded into the cavity 5, the end cap 9 is used to seal the cavity 5. Therefore, it is more convenient to install and replace the activated carbon core 1. The end of the filter cartridge 2 close to the water outlet 4 has an annular protrusion 23. The annular protrusion 23 is formed by extending outward from the inner circular edge of the bottom cover 211, and is used to guide the filtered water to flow out of the water outlet 4 into the subsequent pipeline, and also facilitates the installation and sealing of the filter element.

[0033] The radius of the outer shell 21 at both ends of the filter cartridge 2 is smaller than that of the outer shell 21 in the middle section of the filter cartridge 2. When entering the middle section of the filter cartridge 2 from the water inlet end, the increased radius of the outer shell 21 increases the contact area between the water and the activated carbon core 1. On the other hand, the water flow rate slows down, allowing for sufficient contact between the water and the activated carbon core 1. When entering the water outlet end of the filter cartridge 2 from the middle section, the resistance encountered by the water during the filtration process of the activated carbon core 1 gradually increases. The decreased radius of the outer shell 21 increases the water flow rate, compensating for the power loss of the water passing through the filter layer.

[0034] Reference Figure 5 , sealing rings 10 are provided at both ends of the filter cartridge 2. The sealing ring 10 at the water inlet end of the filter cartridge 2 is sleeved on the end cover 9, and the sealing ring 10 at the water outlet end of the filter cartridge 2 is sleeved on the annular protrusion 23. The sealing ring 10 is used to seal the connection between the activated carbon filter element and subsequent equipment.

[0035] The implementation principle of an activated carbon filter element in an embodiment of the present application is as follows: water flows into a front PP cotton filter element 6 from a plurality of water inlet holes 3. The circumferential array of water inlet holes 3 enables the water flow to flow in evenly in multiple paths. The water flow branching slows down the flow rate of the water and increases the filtration time. The front PP cotton filter element 6 removes larger solid impurities in the water, and then the water flows into the activated carbon core 1 and fully contacts the activated carbon core 1. The activated carbon core 1 performs deep and precise filtration, and finally is further filtered through the rear PP cotton filter element 7. After the filtration is completed, the water flows out from the water outlet 4 along the annular protrusion 23.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An activated carbon filter element, comprising an activated carbon core (1) and a filter cartridge (2), characterized in that: The filter cartridge (2) comprises an outer shell (21) and an inner shell (22) which are concentrically fixed relative to each other, a cavity (5) being provided between the outer shell (21) and the inner shell (22), the activated carbon core (1) being encapsulated in the cavity (5), a plurality of water inlet holes (3) being provided on the outer circumference of one end of the outer shell (21), and a water outlet (4) being provided on the end of the inner shell (22) away from the water inlet holes (3).

2. The activated carbon filter element according to claim 1, characterized in that: A front PP cotton filter core (6) is provided at one end of the cavity (5) close to the water inlet hole (3); the water inlet hole (3) is located at one end of the front PP cotton filter core (6); and the other end of the front PP cotton filter core (6) blocks one end of the activated carbon core (1).

3. The activated carbon filter element according to claim 1, characterized in that: A post-placed PP cotton filter core (7) is provided at one end of the cavity (5) close to the water outlet (4), the water outlet (4) is located at one end of the post-placed PP cotton filter core (7), and the other end of the post-placed PP cotton filter core (7) blocks one end of the activated carbon core (1).

4. The activated carbon filter element according to claim 1, characterized in that: A plurality of water outlets (4) are distributed along the circumference of the inner shell (22).

5. The activated carbon filter element according to claim 1, characterized in that: One end of the outer shell (21) is provided with a bottom seal (211), and the bottom seal (211) seals the cavity (5).

6. The activated carbon filter element according to claim 1, characterized in that: One end of the filter cartridge (2) is provided with a loading port (8) for loading the activated carbon core (1).

7. The activated carbon filter element according to claim 6, characterized in that: The charging port (8) is provided with an end cover (9), and the end cover (9) is used to seal the charging port (8).

8. The activated carbon filter element according to claim 1, characterized in that: The activated carbon core (1) is granular activated carbon.

9. The activated carbon filter element according to claim 1, characterized in that: The radius of the outer shell (21) at both ends of the filter cartridge (2) is smaller than the radius of the outer shell (21) at the middle section of the filter cartridge (2).

10. The activated carbon filter element according to claim 1, characterized in that: Sealing rings (10) are provided at both ends of the filter cartridge (2).

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