Lead and bacteria removal filter element and drinking water device

Abstract

The utility model relates to the technical field of drinking water filtration. The utility model relates to a lead removal degerming filter element and drinking water device, the filter element comprises: a filter element shell, the filter element shell has a water inlet and a water outlet, a filter space is communicated with the water inlet and the water outlet, the filter space is internally provided with an active carbon structure layer, a cation exchange fiber layer and an electric crystal film filter structure layer. The drinking water device comprises the lead-removing and bacteria-removing filter element. Through triple adsorption combination of activated carbon adsorption, cation exchange fiber exchange adsorption and electric crystal film adsorption, lead ions, bacteria, microorganisms and organic matters are effectively adsorbed and removed, the filtered drinking water can reach NSF drinking water safety and health standards, the beneficial technical effects are obtained, and the drinking water purifier has the advantages of being low in use cost, high in practicability and the like. An external power supply is not needed, the application scene is wide, and certain progress is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water filtration, in particular to drinking water filter element technology. Background Art

[0002] With the development of industry, agriculture and social economy, a large amount of industrial wastewater, fertilizers, pesticides, domestic sewage and surface runoff are discharged into the natural water environment, making the pollution of urban drinking water sources increasingly serious and becoming micro-polluted water sources. In particular, the presence of heavy metals and various organic pollutants, viruses and bacterial microorganisms in the water source has significantly increased the risk of disinfection by-products and pathogenic microorganisms that can be produced in drinking water. Especially lead ions, urban tap water pipes are mostly selected from lead-containing metal pipes, and the use of chlorine as a sterilizing disinfectant in water plants has accelerated the erosion and aging of lead-containing water pipes. If lead-contaminated water is consumed for a long time, lead is not easy to be discharged and is deposited in the human body for a long time, which will lead to many aspects such as high blood pressure, heart disease, kidney and immune system diseases. At present, most urban water plants still use the traditional raw water-coagulation-sedimentation-filtration-disinfection process. This process is not ideal for removing lead ions and virus microorganisms that are smaller than protozoa and bacterial microorganisms, so that the lead ion content and microbial safety of the effluent cannot be guaranteed. In the field of water filtration technology, microfiltration and ultrafiltration water treatment processes are not effective in treating lead and cannot effectively remove lead; reverse osmosis and nanofiltration water treatment processes are cumbersome to use, waste water and electricity, are costly, and the discharged concentrated liquid is difficult to handle and can easily cause secondary pollution; and the sedimentation method also has the problem of difficult treatment. Utility Model Content

[0003] The utility model aims to provide a lead and bacteria removal filter element and a drinking water device to solve the above technical problems.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] A lead and bacteria removal filter element comprises a filter element housing having a water inlet and a water outlet, wherein a filter space is connected to the water inlet and the water outlet, and is characterized in that: the filter space, from the water inlet to the water outlet, is sequentially provided with: an activated carbon structure layer, a cation exchange fiber layer and an electrocrystalline membrane filter structure layer.

[0006] Activated carbon is a commonly used filter material, which is mostly made of carbon-containing materials such as nature, coal, fruit shells (cores) through chemical or physical activation. It has a lot of micropores and specific surface area. The specific surface area of ​​ordinary activated carbon is 500-1700m 2 / g, so it has a strong adsorption capacity and can effectively adsorb organic pollutants in water. In addition, during the activation process, some oxygen-containing functional groups are formed on the non-crystalline part of the activated carbon surface. These groups make the activated carbon have chemical adsorption and catalytic oxidation and reduction properties, which can effectively remove some metal ions in water.

[0007] Furthermore, the activated carbon structural layer adopts an activated carbon particle layer; the activated carbon structural layer is sealed with a water filter material layer above, and the water filter material layer is called a pre-filter layer; the activated carbon structural layer is sealed with a water filter material layer below, and the water filter material layer is called a post-filter layer; the activated carbon particle layer is filled in a filter element shell.

[0008] Further preferably, the front filter layer uses PP cotton with a minimum filtration of 5 μm; the rear filter layer uses one of PP cotton and sodium metasilicate ceramics with a minimum filtration of 1 μm to 0.5 μm.

[0009] The activated carbon layer is a mixture of particles and powders. This structure is relatively non-dense, which can increase the water filtration stroke without clogging, thus improving the adsorption quality. The pre-filter layer is used to filter large particles of impurities before the activated carbon layer, so that large particles of impurities do not occupy the filtration service life of the activated carbon particles. After the activated carbon particles, a post-filter layer is used to filter out the scattered tiny activated carbon powder to solve the problem of black water.

[0010] More preferably, the activated carbon particles are mixed with particles and powder, which is called an activated carbon mixture. The gaps between the particles of activated carbon are filled with powdered activated carbon. The mass ratio of the particles of activated carbon to the powdered activated carbon is between 1:3 and 1:5. The activated carbon mixture is subjected to 5 kg / cm 2 Above, 20kg / cm 2 The following pressure is used to compact the liquid and fill it into a tube, which is then assembled into the filter element housing.

[0011] Due to the large gaps between activated carbon particles, the activated carbon and water flow are not in sufficient contact, which affects filtration. In this patent, activated carbon particles and activated carbon powder are mixed and compacted, and the pressure is limited to 20kg / cm 2 It can avoid excessive pressure causing the activated carbon particles and powder to be too dense, and solve the problem of insufficient contact between activated carbon and water flow, which affects filtration.

[0012] The pressure refers to the compression pressure used in the process of encapsulating the activated carbon particles into the accommodation space. Because the activated carbon particles are not very elastic, the front filter layer and the rear filter layer can be sealed after compression.

[0013] Furthermore, the cation exchange fibers in the cation exchange fiber layer are short fiber structures; the cation exchange fibers are selected to have a fineness of 1.2 dtex, a fiber length of 38 mm, and a specific surface area of ​​​​60m 2 / g, the specific surface area of ​​cation exchange fiber is greater than or equal to 63m 2 / g, cation exchange fiber of this specification.

[0014] During the water purification process, cation exchange fibers can effectively remove heavy metal ions, fluoride, nitrate and other substances in water through adsorption, exchange and filtration structures.

[0015] Furthermore, the crystal membrane filtration structure layer is arranged below the filtration space, and is surrounded by a crystal membrane to form a hollow tube, called a crystal membrane tube. The crystal membrane tube and the inner wall of the filter element housing are provided with a gap greater than 0.3mm and less than 1.5mm; a water path is provided in the filtration space, through which water enters from the outer wall of the crystal membrane tube, passes through the inner wall of the crystal membrane tube to the hollow part of the crystal membrane tube, and then flows downward from the hollow part of the crystal membrane tube.

[0016] After the electrocrystalline membrane is soaked in water, an "electric membrane" will be generated on its surface. The mineral crystal structure attached to the fiber surface can generate a natural AL+++ electromotive potential, forming a positive voltage of 53 microvolts, just like the N and S poles of a magnet, which will generate gravity when they are close to each other. The electrocrystalline membrane absorbs organic, inorganic and pathogenic pollutants through electric charge. The positive charge it possesses not only directly inhibits the growth of viruses and bacteria, but also has the ability to actively capture and superimpose adsorption. When harmful substances in the water approach the electrocrystalline membrane, they will be actively adsorbed by it. These adsorbed impurities will become new adsorbents that expand outward through charge conduction, further filtering harmful substances in the water. Therefore, the electrocrystalline membrane has the dual advantages of large flux (2 micron pore size) and high removal capacity.

[0017] Further preferably, there is an upper cover above the crystal membrane tube, and a lower cover below the crystal membrane tube, and the upper cover and the lower cover are glued and fixed at both ends of the crystal membrane tube; the upper cover has no water inlet in the central part, and has a plurality of water inlets around it. After being glued to the crystal membrane tube, the hollow part of the crystal membrane tube is closed by the upper cover; the lower cover has a lower cover water outlet in the center. After being glued to the crystal membrane tube, the hollow part of the crystal membrane tube is connected to the water outlet of the lower cover. The diameter of the water outlet of the lower cover is smaller than the diameter of the hollow part, and the water outlet of the lower cover is connected to the water outlet of the filter element housing.

[0018] After the upper cover closes the hollow part of the crystal membrane tube, the water to be filtered first enters from the periphery, passes through the outer wall and inner wall of the crystal membrane and enters the hollow part. This process completes the adsorption of impurities, and the filtered water flows out from the hollow part.

[0019] The water outlet of the lower cover is connected to the hollow part of the electrocrystalline membrane tube, and only the water after adsorption and filtration is allowed to flow out from the hollow part, while the unabsorbed and unfiltered water to be treated cannot flow out through the lower cover.

[0020] Further preferably, the water outlet of the filter element housing opens at the center and has a diameter controlled at 2-3 mm.

[0021] The opening diameter of the water outlet of the filter element shell can keep the flow rate of the water to be treated within a certain range, so that the water to be treated has sufficient adsorption time in the filter element and between the activated carbon, cation exchange fiber and electrocrystalline membrane.

[0022] The present application also proposes a drinking water device, comprising the lead-removing and sterilizing filter element as described above. Further, the lead-removing and sterilizing filter element is detachably installed in a housing of the drinking water device.

[0023] The size of lead ions in water is usually 0.5nm. Those skilled in the art generally believe that only by increasing the filtration accuracy as much as possible can lead ions, bacteria, microorganisms and organic matter be filtered out, such as a nanofiltration membrane with a filtration accuracy of 1-0.1nm or a reverse osmosis membrane with a filtration accuracy of 0.1nm.

[0024] However, the inventor of the present utility model overcame the prejudice of the prior art, abandoned the physical pore size filtration scheme, and adopted an adsorption scheme. Through the triple adsorption combination of activated carbon adsorption, cation exchange fiber exchange adsorption and electrocrystalline membrane adsorption, the effective adsorption and removal of lead ions, bacteria, microorganisms and organic matter was achieved. The filtered drinking water can meet the NSF drinking water safety and health standards, and beneficial technical effects have been achieved. It also has the advantages of low cost, no need for external power supply, and a wide range of usage scenarios, which is a certain improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of the filter housing;

[0026] Figure 2 is a longitudinal sectional view of the filter housing;

[0027] Figure 3 It is a structural diagram of the filling layer inside the filter housing;

[0028] Figure 4 It is a diagram of the structure of activated carbon layer;

[0029] Figure 5 This is a diagram of the structure of a transistor film.

[0030] Explanation of symbols

[0031] 1 Filter housing

[0032] 11 Water Inlet

[0033] 12 Water outlet

[0034] 2 Filter space

[0035] 3 Activated carbon structure layer

[0036] 31 Plastic filter cover

[0037] 32 Pre-filter layer

[0038] 33 Activated carbon granules

[0039] 34 Post-filter layer

[0040] 4 Cation exchange fiber layer

[0041] 5. Electrocrystalline membrane filtration structure layer

[0042] 51 Upper cover

[0043] 52 Transistor Film Tube

[0044] 53 Lower cover DETAILED DESCRIPTION

[0045] In order to make the technical means, specific structure, purpose and effect achieved by the present invention easy to understand, the present invention is further described below with reference to the accompanying drawings.

[0046] Reference Figure 1 , Figure 2 , Figure 3 As shown, a lead and bacteria removal filter element includes a filter element housing 1, which has a water inlet 11 and a water outlet 12, and a filtration space 2 connected to the water inlet 11 and the water outlet 12. The filtration space 2, from the water inlet 11 to the water outlet 12, is sequentially provided with: an activated carbon structure layer 3, a cation exchange fiber layer 4 and an electrocrystalline membrane filtration structure layer 5.

[0047] like Figure 1 As shown, the water inlet 11 is opened on the convex cover of the filter element housing 1, which is an annular water-permeable groove on the top surface of the convex cover and a fence-type water gate on the side wall. The water inlet method of the annular water-permeable groove and the fence-type water gate can prevent the water flow from directly flushing the activated carbon structure layer 3, causing the already adsorbed impurities to be separated.

[0048] like Figure 4 As shown, the activated carbon structure layer 3 adopts an activated carbon particle layer; the activated carbon structure layer 3 is sealed with a water filter material layer above, and the water filter material layer is called a pre-filter layer 32; the activated carbon structure layer 3 is sealed with a water filter material layer below, and the water filter material layer is called a post-filter layer 34; the activated carbon particle layer is filled in a filter element housing 1.

[0049] The activated carbon particles can be made of silver-loaded activated carbon material, or other auxiliary filtering materials can be added.

[0050] Activated carbon rods are a commonly used activated carbon filtration device, but because the structure is relatively dense, the water filtration distance cannot be too long during use, so it is generally made into a hollow tubular structure in production. However, this single structure has limitations in use; secondly, due to the short water filtration distance, it is difficult to exert adsorption, so the adsorption effect is not good.

[0051] In this embodiment, encapsulated activated carbon particles are used to reduce the density of the activated carbon particles, thereby increasing the water filtration distance and more effectively improving the adsorption effect.

[0052] The front filter layer 32 is made of PP cotton with a minimum filtration of 5 μm; the rear filter layer 34 is made of one of PP cotton and sodium metasilicate ceramic with a minimum filtration of 1 μm to 0.5 μm.

[0053] The function of the pre-filter layer 32 is to preferentially filter large particles of impurities such as sand, rust, and insect eggs with a diameter of more than 5 μm in the water to extend the service life of the activated carbon particles. During use, a PP cotton filter device, a ceramic filter device, or a replacement resin filter device can be used as a pre-filter device for the activated carbon structure layer 3.

[0054] The post-filter layer 34 can further filter particles and foreign matter in the water with a diameter between 1-5 μm, and its main function is to filter out scattered tiny activated carbon powder to prevent the outlet water from turning black. During use, a PP cotton filter device, a ceramic filter device, or a replacement resin filter device can be used as a post-filter device of the activated carbon structure layer 3.

[0055] The plastic filter cover 31 may also be used to compact the front filter layer 32 and the rear filter layer 34, thereby ensuring the compaction density of the filled activated carbon particles.

[0056] Furthermore, the activated carbon particles are mixed with particles and powder, which is called an activated carbon mixture. The gaps between the particles of activated carbon are filled with powdered activated carbon. The mass ratio of the particles of activated carbon to the powdered activated carbon is between 1:3 and 1:5. The activated carbon mixture is subjected to 5kg / cm 2 Above, 20kg / cm 2 The following pressure is used to compact the water and fill it into a tube body, which is then assembled in the filter element housing. The tube body can be a watertight plastic tube for guiding water flow.

[0057] Due to the large gaps between the activated carbon particles, the activated carbon and the water flow are not in sufficient contact, which affects the filtration. In this embodiment, the activated carbon particles and activated carbon powder are mixed and compacted, and the pressure is limited to 20kg / cm 2 It can avoid excessive pressure causing the activated carbon particles and powder to be too dense, and solve the problem of insufficient contact between activated carbon and water flow, which affects filtration.

[0058] The pressure refers to the compression pressure used in the process of encapsulating the activated carbon particles into the accommodation space. Because the activated carbon particles are not very elastic, the pre-filter layer 32 and the post-filter layer 34 can be sealed after the activated carbon particles are compressed.

[0059] like Figure 3 As shown, the cation exchange fibers in the cation exchange fiber layer 4 are short fiber structures; the cation exchange fibers are selected to have a fineness of 1.2 dtex, a fiber length of 38 mm, and a specific surface area of ​​​​the ion exchange fibers greater than or equal to 60m 2 / g, the specific surface area of ​​cation exchange fiber is greater than or equal to 63m 2 / g, cation exchange fiber of this specification.

[0060] During the water purification process, cation exchange fibers can effectively remove heavy metal ions, fluoride, nitrate and other substances in water through adsorption, exchange and filtration structures.

[0061] like Figure 5 As shown, the crystal membrane filtration structure layer 5 is arranged below the filtration space 2, and is surrounded by a crystal membrane to form a hollow tube, called a crystal membrane tube 52. The crystal membrane tube 52 and the inner wall of the filter element housing 1 are provided with a gap greater than 0.3 mm and less than 1.5 mm; a waterway is provided in the filtration space 2, which allows water to enter from the outer wall of the crystal membrane tube 52, pass through the inner wall of the crystal membrane tube 52 to the hollow part of the crystal membrane tube 52, and then flow downward from the hollow part of the crystal membrane tube 52.

[0062] Electrocrystalline membrane is a filter material based on glass fiber substrate with positively charged mineral crystals attached to the surface. It has high filtering capacity, low pressure drop and large specific surface area. It is also a water purification material with active adsorption capacity. When the electrocrystalline membrane is soaked in water, an "electric membrane" will be generated on its surface. The mineral crystal structure attached to the fiber surface can generate a natural AL+++ electromotive potential, forming a positive voltage of 53 microvolts, just like the N and S poles of a magnet, which will generate gravity when approaching each other. Electrocrystalline membrane adsorbs organic, inorganic and pathogenic pollutants through electric charge, and can remove polysaccharides and colloids. The positive charge it possesses not only directly inhibits the growth of viruses and bacteria, but also has the ability to actively capture and superimpose adsorption. When harmful substances in water approach the electrocrystalline membrane, they will be actively adsorbed by it. These adsorbed impurities will become new adsorbents that expand outward through charge conduction, further filtering harmful substances in water. Therefore, the electrocrystalline membrane has the dual advantages of large flux (2 micron pore size) and high removal capacity.

[0063] It is further preferred that an upper cover 51 is provided above the transistor membrane tube 52, and a lower cover 53 is provided below the transistor membrane tube 52, and the upper cover 51 and the lower cover 53 are bonded and fixed at both ends of the transistor membrane tube 52; the upper cover 51 has no water inlet in the central part, but has a plurality of water inlets in the periphery, and after being bonded to the transistor membrane tube 52, the hollow part of the transistor membrane tube 52 is closed by the upper cover 51; the lower cover 53 has a lower cover water outlet in the center, and after being bonded to the transistor membrane tube 52, the hollow part of the transistor membrane tube 52 is connected to the lower cover water outlet, the diameter of the lower cover water outlet is smaller than the diameter of the hollow part, and the lower cover water outlet is connected to the water outlet 12 of the filter element housing 1.

[0064] After the upper cover 51 closes the hollow part of the transistor membrane tube 52, the water to be filtered first enters from the periphery, passes through the outer wall and inner wall of the transistor membrane tube 52, and then enters the hollow part. This process completes the adsorption of impurities, and the filtered water flows out from the hollow part.

[0065] The water outlet of the lower cover is connected to the hollow part of the transistor membrane tube 52 , and only the water after adsorption and filtration is allowed to flow out from the hollow part, while the unabsorbed and unfiltered water to be treated cannot flow out through the lower cover 53 .

[0066] Further preferably, the water outlet 12 of the filter element housing 1 opens at the center and has a diameter controlled at 2-3 mm.

[0067] The opening diameter of the water outlet 12 of the filter element housing 1 can control the flow rate of the water to be treated within a certain range, so that the water to be treated has sufficient adsorption time between the activated carbon particles, the cation exchange fibers and the membrane wall of the electrocrystalline membrane in the filter element of this embodiment.

[0068] The present application also proposes a drinking water device, comprising the lead-removing and sterilizing filter element as described above, wherein the lead-removing and sterilizing filter element is detachably installed in the drinking water device. When the lead-removing and sterilizing filter element needs to be replaced, it can be replaced in the detachable manner, which is relatively convenient to operate.

[0069] In this embodiment, the drinking water device includes but is not limited to water filter kettles, coffee machines, water purifiers and other products.

[0070] The above shows and describes the technical solution and ideas, main features and advantages of the utility model.

[0071] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lead and bacteria removal filter element, comprising a filter element housing, which has a water inlet and a water outlet, and a filtration space connected to the water inlet and the water outlet, characterized in that: The filtering space is provided with an activated carbon structure layer, a cation exchange fiber layer and an electrocrystalline membrane filtering structure layer in sequence from the water inlet to the water outlet.

2. The lead and bacteria removal filter element according to claim 1, characterized in that: The activated carbon structural layer adopts an activated carbon particle layer; The activated carbon structure layer is sealed with a water filter material layer, which is called the pre-filter layer; The activated carbon structure layer is sealed with a water filter material layer, which is called the post-filtration layer; The activated carbon particle layer is filled in a filter element housing.

3. The lead and bacteria removal filter element according to claim 2, characterized in that: The front filter layer adopts PP cotton with a minimum filtration of 5 μm; the rear filter layer adopts one of PP cotton and sodium metasilicate ceramic with a minimum filtration of 1 μm to 0.5 μm.

4. The lead and bacteria removal filter element according to claim 2, characterized in that: The activated carbon particles are mixed with particles and powder, which is called an activated carbon mixture. The gaps between the granular activated carbon are filled with powdered activated carbon. The mass ratio of the granular activated carbon to the powdered activated carbon is between 1:3 and 1:

5. The activated carbon mixture is passed through 5kg / cm 2 Above, 20kg / cm 2 The following pressure is used to compact the liquid and fill it into a tube, which is then assembled into the filter element housing.

5. The lead and bacteria removal filter element according to claim 1, characterized in that: The cation exchange fibers in the cation exchange fiber layer are short fiber structures; Selection of cation exchange fiber: fineness is 1.2dtex, fiber length is 38mm, ion exchange fiber specific surface area is greater than or equal to 60m 2 / g, the specific surface area of ​​cation exchange fiber is greater than or equal to 63m 2 / g, cation exchange fiber of this specification.

6. The lead and bacteria removal filter element according to claim 1, characterized in that: The crystal membrane filter structure layer is arranged below the filter space, and is surrounded by a crystal membrane to form a hollow tube, called a crystal membrane tube. The crystal membrane tube and the inner wall of the filter element housing are provided with a gap greater than 0.3 mm and less than 1.5 mm. The filtering space is provided with a water path for water to flow in from the outer wall of the crystal membrane tube, pass through the inner wall of the crystal membrane tube to the hollow part of the crystal membrane tube, and then flow out downward from the hollow part of the crystal membrane tube.

7. The lead and bacteria removal filter element according to claim 6, characterized in that: An upper cover is provided above the transistor film tube, and a lower cover is provided below the transistor film tube. The upper cover and the lower cover are fixed by bonding at two ends of the transistor film tube. The upper cover has no water inlet in the center, but has a plurality of water inlets in the periphery. After being bonded to the transistor membrane tube, the hollow part of the transistor membrane tube is sealed by the upper cover; The lower cover has a lower cover water outlet at the center. After being bonded to the transistor membrane tube, the hollow part of the transistor membrane tube is connected to the lower cover water outlet. The diameter of the lower cover water outlet is smaller than the diameter of the hollow part. The lower cover water outlet is connected to the water outlet of the filter element housing.

8. The lead and bacteria removal filter element according to claim 1, characterized in that: The water outlet of the filter element housing is opened at the center and the diameter is controlled at 2-3 mm.

9. A drinking water device, characterized in that: It comprises the lead and bacteria removal filter element as described in any one of claims 1 to 8.

10. The drinking water device according to claim 9, characterized in that The lead and bacteria removal filter element is detachably installed in the housing of the drinking water device.

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