CN210915611U - Composite filter element and water purification system - Google Patents

Abstract

The utility model discloses a composite filter element and a water purification system. The composite filter element comprises a plurality of filter layers which can enable a filtered medium to pass in sequence from outside to inside. layer; adsorption and sterilization layer, the adsorption and sterilization layer includes graphene and activated carbon, and graphene and activated carbon form a composite material. The above-mentioned composite filter element utilizes the characteristics of uniform pore size, uniform pore density and high porosity of the nuclear pore membrane, so that the retention amount of the retentate on the surface of the first nuclear pore membrane is minimized, the clogging of the filter hole is relieved, and the filtration efficiency and efficiency are improved. Service life; Graphene has strong bactericidal properties, which avoids the risk of safe precipitation of heavy metal particles in the past; at the same time, graphene and activated carbon composite materials can fully sterilize the adsorbed impurities, avoiding the growth of bacteria in the adsorption and bactericidal layer, and the composite The filter element is small in size, multi-functional and long-life, which can meet various usage scenarios.

Description

Composite filter element and water purification system

technical field

The utility model relates to the technical field of water purification, in particular to a composite filter element and a water purification system.

Background technique

The filter element is the core component of the drinking water purification device. The structure and performance of the filter element affect the use effect of the purification device. The existing filter element is mainly made of a single material, such as activated carbon filter element, single external pressure ultrafiltration membrane, etc., and its purification effect is not good. , and simply connecting several filter elements in series can improve the purification effect of drinking water, but there are problems such as large space occupation, complicated assembly, and large number of joints. And the traditional particle separation filter element mostly uses non-woven fabrics, activated carbon, sintered ceramics and other deep filter materials. Due to the limitation of the multi-layer structure of the material itself, the depth filter material often has uneven pore size, and it is difficult to obtain accurate filtration accuracy; during filtration, it is necessary to block the particulate matter layer by layer under the action of external force, and the filtration resistance is large. , the filtration efficiency is low, the energy consumption is large, and the filter element is replaced frequently; in addition, due to the maze-like porosity of the material, it has a strong water absorption capacity, and the material is often in a wet state, which is easy to breed bacteria, parasites and other harmful substances. Therefore, the secondary pollution of such materials is extremely serious.

Utility model content

Based on this, the technical problem to be solved by the present invention is to provide a composite filter element and a water purification system with small volume, multiple functions and good purification effect.

For realizing above-mentioned utility model purpose, the utility model adopts following technical scheme to realize:

A composite filter element, comprising a plurality of filter layers that can enable a filtered medium to pass through in sequence from outside to inside, and the plurality of filter layers from outside to inside are as follows:

the first nuclear pore membrane layer;

The adsorption and sterilization layer includes graphene and activated carbon, and the graphene and activated carbon form a composite material.

Further, the plurality of filter layers also include a scale inhibitor layer, and the scale inhibitor layer is provided with a scale inhibitor; the scale inhibitor layer is arranged on the inner side of the adsorption and sterilization layer, and the filtered medium passes through the adsorption and sterilization layer Then enter the scale inhibition layer.

Further, a scale inhibitor is arranged in the adsorption and sterilization layer.

Further, the plurality of filter layers further include a second nuclear pore membrane layer, and the second nuclear pore membrane layer is located at the innermost side of the plurality of filter layers.

Further, the mass percentage content of graphene in the composite material ranges from 0.01% to -20%.

Further, the nuclear pore membrane pore size range of the first nuclear pore membrane layer is (0.02 μm-30 μm).

Further, the nuclear pore membrane pore size of the second nuclear pore membrane layer is less than or equal to 3 μm.

Further, the inner and outer sides of each filter layer are provided with non-woven layers.

Further, the composite filter element has a cylindrical structure, a plurality of filter layers are arranged in an annular shape from outside to inside, and the inner side of the innermost filter layer forms a water purification channel; The plurality of filter layers are sequentially stacked in the direction.

A water purification system, comprising a water inlet, a pre-filter, a pump, a central filter, a post-filter and an outlet faucet, wherein the pre-filter comprises the composite filter element; or the The post filter includes the composite filter element; or the composite filter element is arranged on the water outlet faucet.

Compared with the prior art, the advantages and positive effects of the present utility model are:

The above-mentioned composite filter element utilizes the characteristics of uniform pore size, uniform pore density and high porosity of the nuclear pore membrane, so that the retention amount of the retentate on the surface of the first nuclear pore membrane is minimized, the clogging of the filter hole is relieved, and the filtration efficiency is improved. It increases the service life of the filter material and provides a better influent environment for the fine filtration system; using the large specific surface energy of graphene, it has strong bactericidal properties, and it gets rid of the safe precipitation of heavy metal nanoparticles (such as nano-silver) in the past. The risk of exceeding the standard; at the same time, the graphene and activated carbon composite material can fully sterilize the adsorbed impurities, avoiding the growth of bacteria in the adsorption and sterilization layer. The composite filter element of the utility model has the advantages of small size, multiple functions and long service life, which can meet various usage scenarios, and can be used as a pre-filter element or a rear filter element of a water purification system alone, so as to improve the purification effect of the water purification system and prolong the service life of the system. , while reducing the space occupied by the water purification system.

Other features and advantages of the present invention will become more apparent after reading the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structural representation one of the composite filter element of the present utility model, and it is illustrated as the side-flow water inlet structure of the composite filter element;

Fig. 2 is the second structural schematic diagram of the composite filter element of the present invention, which is the direct-flow water inlet structure of the composite filter element;

3 is a schematic diagram 1 of the water purification system of the present utility model, which is a schematic diagram of the use of a composite filter element as a pre-filter element;

Fig. 4 is the schematic diagram 2 of the water purification system of the present invention, which is a schematic diagram of the use of a composite filter element as a rear filter element;

Description of reference numbers:

Composite filter element 100;

The first nuclear pore membrane layer 110; the adsorption and sterilization layer 120; the scale inhibition layer 130; the second nuclear pore membrane layer 140; the non-woven fabric 150;

Water inlet 200 , pre-filter 300 , pump 400 , middle filter 500 , post filter 600 ; outlet faucet 700 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

It should be noted that, in the description of the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate directions or The terminology of the positional relationship is based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood To limit the utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

Referring to FIG. 1 , which is an embodiment of a composite filter element 100 of the present invention, the composite filter element 100 includes a plurality of filter layers that enable the media to be filtered to pass through sequentially from outside to inside. The filtered media can be various liquid media such as water and beverages. In this embodiment, the composite filter element 100 is used in a water purification system as an example for description, and the flow direction of the filtered medium (water) is defined as from outside to inside. The plurality of filter layers are sequentially from outside to inside: a first nuclear pore membrane layer 110 and an adsorption and sterilization layer 120 . When used in a pre-filter, the first nuclear pore membrane layer 110 can retain impurities such as organic matter, sediment, and rust in the water. Preferably, the nuclear pore membrane pore size of the first nuclear pore membrane layer 110 ranges from 0.02 μm to 30μm. The adsorption and sterilization layer 120 includes graphene and activated carbon, and graphene and activated carbon form a composite material. The composite manufacturing method of graphene and activated carbon is a known technology and will not be described in detail here. In this embodiment, in the composite material, the mass percentage of graphene is in the range of 0.01% to 20%. Activated carbon can further efficiently adsorb impurities in water, and activated carbon includes but is not limited to activated carbon particles, activated carbon fibers, and the like. At the same time, graphene has bactericidal and bacteriostatic effects, which can sterilize water. At the same time, graphene and activated carbon composite materials can fully sterilize the impurities adsorbed by activated carbon, avoiding the accumulation of adsorbed impurities and generating more bacteria.

The above-mentioned composite filter element 100 utilizes the characteristics of uniform pore size, uniform pore density and high porosity of the nuclear pore membrane, so that the retention amount of the retentate on the surface of the first nuclear pore membrane is minimized, the clogging of the filter pores is alleviated, and the filtration rate is improved. Efficiency and increase the service life of the filter material, providing a more high-quality influent environment for the fine filtration system; using the large specific surface energy of graphene, it has a strong sterilization performance, getting rid of the need for heavy metal nanoparticles (such as nano silver) in the past. The risk of safe precipitation exceeds the standard; at the same time, the graphene and activated carbon composite material can fully sterilize the adsorbed impurities, avoiding the growth of bacteria in the adsorption and sterilization layer 120. The composite filter element 100 of the present utility model has small volume, multiple functions and long service life, can meet various usage scenarios, and can be used alone as a pre-filter or a rear-filter of a water purification system, so as to improve the purification effect of the water purification system and improve the efficiency of the system. longevity while reducing the footprint of the water purification system.

Further, the plurality of filter layers also include a scale inhibitor layer 130, and a scale inhibitor is provided in the scale inhibitor layer 130. Scale inhibitors include but are not limited to organic phosphorus series, organic phosphate series, phosphorus-free scale inhibitors, etc. The scale-inhibiting layer 130 can disperse the insoluble inorganic salt in water, prevent or interfere with the precipitation and scaling of the insoluble inorganic salt, and can remove scale and prevent the formation of scale.

In this embodiment, the scale-inhibiting layer 130 is disposed inside the adsorption and sterilization layer 120 , and the filtered medium enters the scale-inhibiting layer 130 after passing through the adsorption and sterilization layer 120 . In other embodiments, the scale inhibitor layer 130 may also be disposed between the first nuclear pore membrane layer 110 and the adsorption and sterilization layer 120 .

The scale inhibitor layer 130 can be composed entirely of scale inhibitor; it can also be composed of scale inhibitor and other filter materials, including but not limited to activated carbon particles, activated carbon fibers, etc., which can further improve the scale inhibitory effect of the scale inhibitor.

In order to further improve the filtering effect of the composite filter element 100, the multiple filter layers further include a second nuclear pore membrane layer 140, and the second nuclear pore membrane layer 140 is located at the innermost side of the multiple filter layers. Preferably, the pore size of the nuclear pore membrane of the second nuclear pore membrane layer 140 is less than or equal to 3 μm, which can further intercept impurities and bacteria in the water.

In this embodiment, the inner and outer sides of each filter layer are provided with non-woven fabric 150 layers. The 150 layers of non-woven fabrics can not only play a filtering role, but also cover and isolate each filter layer. In this embodiment, the filter layers are arranged in contact with each other. In other embodiments, the filter layers may also be arranged at intervals.

In the structural design of the composite filter element 100 of the present invention, the adsorption and sterilization layer 120 and the scale inhibitor layer 130 can be selected from two, or the two layers can be melted into one layer, that is, a scale inhibitor is arranged in the adsorption and sterilization layer. The second nuclear pore membrane layer 140 can also be optionally added as a fine filter layer according to requirements. The pore diameters of the first nuclear pore membrane layer 110 and the second nuclear pore membrane layer 140 may also be reasonably set according to the usage scenario of the filter element.

The composite filter element 100 of this embodiment can be designed in two structural forms, namely, a side-flow water inlet structure and a straight-through water inlet structure.

As shown in FIG. 1 , the side-flow water inlet structure of the composite filter element 100 is shown. The composite filter element 100 is a cylindrical structure and includes end caps 161 at both ends. Fixed, and the innermost filter layer forms a purified water flow channel 170 . The raw water passes through the first nuclear pore membrane layer 110, the adsorption and sterilization layer 120, the scale inhibitor layer 130 and the second nuclear pore membrane layer 140 in sequence from the outside to the inside, and flows out of the water purification channel into the next system.

As shown in FIG. 2, the direct-flow water inlet structure of the composite filter element 100 is shown. The composite filter element 100 includes a tubular casing 163, and end caps 162 are respectively provided at both ends of the tubular casing 163. The tubular casing 163 is provided with a plurality of filter elements stacked in sequence along the axial direction. The raw water flows directly into the water along the axial direction of the tubular shell 163 , and passes through the first nuclear pore membrane layer 110 , the adsorption and sterilization layer 120 , the scale inhibition layer 130 and the second nuclear pore membrane layer 140 in sequence. Each filter layer is isolated and fixed by partitions 164 .

The utility model also includes a water purification system, which can be a reverse osmosis membrane system, a nanofiltration system, an ultrafiltration system, an electrodialysis membrane system or a ceramic membrane system. As shown in FIGS. 3 and 4 , the water purification system includes a water inlet 200 , a pre-filter 300 , a pump 400 , a central filter 500 , a post-filter 600 and a water outlet 700 . The central filter 500 corresponds to different filters in different water purification systems. For example, in a reverse osmosis membrane system, the central filter is a reverse osmosis membrane filter. In the water purification system, as shown in FIG. 3 , the composite filter element 100 may be arranged in the pre-filter as a pre-filter, or as shown in FIG. 4 , the composite filter element 100 may be arranged in the post-filter as a rear filter, Alternatively, it can also be installed on the water outlet faucet as a water outlet filter element. The composite filter element can be used as a pre-filtration device alone, which improves the purification effect of the water purification system, improves the service life of the system, and reduces the space occupied by the water purification system. It should be noted that the application scenarios of the composite filter element of the present invention include, but are not limited to, a pre-filter element, a rear-mounted filter element, a faucet filter element, a shower filter element, and the like.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to implement the foregoing implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims (9)

1. The utility model provides a composite filter element, includes a plurality of filter layers that enable to be filtered medium and loop through from outer to inner, its characterized in that, a plurality of filter layers are by outer to inner in proper order:

a first nucleopore membrane layer;

the adsorption sterilization layer comprises graphene and activated carbon, and the graphene and the activated carbon form a composite material.

2. The composite filter element of claim 1, wherein the plurality of filtration layers further comprises a scale inhibiting layer, and a scale inhibitor is disposed in the scale inhibiting layer; the scale inhibition layer is arranged on the inner side of the adsorption sterilization layer, and the filtered medium enters the scale inhibition layer after passing through the adsorption sterilization layer.

3. The composite filter element of claim 1, wherein a scale inhibitor is disposed within the adsorbent sterilizing layer.

4. The composite filter element of any of claims 1-3, further comprising a second nucleopore membrane layer in the plurality of filtration layers, the second nucleopore membrane layer being located innermost of the plurality of filtration layers.

5. The composite filter element of claim 1, wherein the first nuclear pore membrane layer has a nuclear pore membrane pore size in the range of (0.02 μ ι η -30 μ ι η).

6. The composite filter element of claim 4, wherein the second nuclear pore membrane layer has a nuclear pore membrane pore size of 3 μm or less.

7. The composite filter element of claim 1, wherein each filter layer is provided with a non-woven layer on both the inner and outer sides.

8. The composite filter element according to any one of claims 1 to 3, wherein the composite filter element is of a cylindrical structure, a plurality of filter layers are sequentially and annularly arranged from outside to inside, and a purified water flow passage is formed inside the innermost filter layer; or the composite filter element comprises a tubular shell, and the plurality of filter layers are sequentially stacked in the tubular shell along the axial direction.

9. A water purification system comprising a water inlet, a pre-filter, a pump, a mid-filter, a post-filter and a water outlet tap, wherein the pre-filter comprises a composite cartridge according to any one of claims 1 to 8; or the post-filter comprises a composite filter element according to any one of claims 1 to 8; or the composite filter element as claimed in any one of claims 1 to 8 is arranged on the water outlet faucet.

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