A carbon fiber filter element

Abstract

The present application relates to the technical field of filtering devices, and more specifically, it relates to a filter element containing carbon fibers. A carbon fiber filter element includes a primary filter element assembly and a secondary filter element assembly, wherein the output end of the primary filter element is connected to the input end of the secondary filter element assembly, the primary filter element includes an upper cover, a lower cover, and a first filter element, the upper cover has a first cavity, the first filter element is accommodated in the first cavity, the inner wall of the upper cover is detachably connected to the lower cover, the upper cover is provided with a water inlet, the secondary filter element assembly is detachably connected to the outer wall of the upper cover, and the first filter element is provided with a non-woven fabric layer, a first mesh layer, a carbon fiber layer, a second mesh layer, and a cotton layer in sequence from the end away from the lower cover. The present application adopts a multi-stage filter element composition to make the purification of domestic water more thorough and cleaner. At the same time, the water is processed by the cotton layer, the second mesh layer, the carbon fiber layer, the first mesh layer and the non-woven fabric layer in sequence to further remove sandpaper particles, bacteria, impurities, etc. in the domestic water. In particular, the carbon fiber layer can further remove heavy metals, chlorides, etc. in the domestic water, further improving the quality of the domestic water. Finally, it is filtered again through the secondary filter element to further remove bacteria, impurities, etc. in the domestic water, thereby improving the filtration effect of the domestic water, improving the quality of the domestic water, and making the domestic water more environmentally friendly and healthy during use.

Description

Technical Field

[0001] The present application relates to the technical field of filtering devices, and more specifically, to a filter element containing carbon fibers. Background Art

[0002] At present, the source of domestic water in most cities in my country is mainly water extracted from rivers through domestic water treatment plants. The water is then processed to remove most impurities, bacteria, etc. and meet the basic standards for domestic water. It is then transmitted to reservoirs in various communities, real estate projects, etc. for storage, and then distributed to each household through the reservoirs. This domestic water cannot be drunk directly.

[0003] Because the amount of domestic water produced by domestic water treatment plants is large, it is usually tested in batches and it is impossible to test all the water. Therefore, all water that is within the national standard can be qualified. Therefore, there are some cases where the test results are close to the unqualified line. At the same time, domestic water may introduce some impurities or chlorides during the transmission process. For example, after the water tank is cleaned with sodium hypochlorite, calcium hypochlorite, etc., some chlorides will be introduced. When domestic water with a high chloride content is used for a long time, it will be harmful to your health.

[0004] With the development of society, people are paying more and more attention to environmental protection and health, so people have stronger requirements on the quality of domestic water. At present, most families install filters to further filter domestic water before reuse. This filter is a very effective way to purify water and improve water quality. It can further remove impurities, bacteria, chlorides, etc. in domestic water.

[0005] The filter element has a filtering function. Commonly used filter elements are ceramic filter elements, activated carbon filter elements, cellulose filter elements and nano filter elements. Ceramic filter elements are more widely used. However, after using the ceramic filter element for a period of time, the scale produced by the ceramic filter element tends to adhere to the surface of the ceramic element, making the surface of the ceramic element yellow or green, thereby blocking water from filtering through the surface of the ceramic element. Therefore, it is usually necessary to remove the ceramic filter element, grind off the scale on the surface of the ceramic element with sandpaper, and then reinstall it on the filter for continued use.

[0006] However, each time a part is polished off, the wall thickness of the ceramic core will decrease, so the longer the ceramic core is used, the lower its filtering effect will be. At the same time, the pores of the ceramic core are large, while the molecules of chloride are small, so chloride can easily enter the interior of the ceramic core through the pores, reducing the efficiency of the ceramic core in removing chloride, thereby reducing the filtering effect of the ceramic core. Summary of the invention

[0007] In order to improve the filtering effect of water quality, the present application provides a filter element containing carbon fibers.

[0008] A carbon fiber filter element provided in the present application includes a primary filter element assembly and a secondary filter element assembly, the output end of the primary filter element is connected to the input end of the secondary filter element assembly, the primary filter element includes an upper cover, a lower cover and a first filter element component, the upper cover has a first cavity, the first filter element component is accommodated in the first cavity, the inner wall of the upper cover is detachably connected to the lower cover, the upper cover is provided with a water inlet, the secondary filter element component is detachably connected to the outer wall of the upper cover, and the first filter element is sequentially provided with a non-woven fabric layer, a first mesh layer, a carbon fiber layer, a second mesh layer and a cotton layer from one end close to the lower cover.

[0009] In the above scheme, a primary filter element assembly and a secondary filter element assembly are used, which are easy to assemble; at the same time, they can be disassembled, which is convenient for observing the dirtiness of the filter element after use, and then convenient for cleaning; furthermore, through multi-stage filter element filtration, domestic water purification can be more thorough and cleaner.

[0010] By installing the first filter element on the upper cover and then closing the lower cover, the first filter element is stabilized inside the upper cover, and the upper cover and the lower cover are detachably connected, so that the first filter element can be easily taken out or installed and fixed.

[0011] The cotton layer has the function of intercepting sand, gravel, hair, impurities, red worms and other impurities in the water. Both the second mesh layer and the first mesh layer have better supporting strength, and can also intercept particles such as sand and gravel impurities in the water. The carbon fiber layer contains carbon fibers that can remove residual chlorine in the water, remove chloramines, and adsorb heavy metal substances in the water, as well as carbon tetrachloride, chloroform, volatile phenols, organic matter and other substances, so that the water quality is further purified and the water quality is improved. The non-woven layer has the function of intercepting particulate impurities, reducing water flow obstruction, and further improving the quality of domestic water. The secondary filter element assembly further filters the domestic water coming out of the non-woven fabric layer, so that the quality of the filtered domestic water is better, thereby achieving a better filtering effect.

[0012] In summary, the present application adopts a multi-stage filter element composition to make the purification of domestic water more thorough and cleaner. At the same time, the water is processed by the cotton layer, the second mesh layer, the carbon fiber layer, the first mesh layer and the non-woven fabric layer in sequence to further remove sandpaper particles, bacteria, impurities, etc. in the domestic water. In particular, the carbon fiber layer can further remove heavy metals, chlorides, etc. in the domestic water, further improving the quality of the domestic water. Finally, it is filtered again through the secondary filter element to further remove bacteria, impurities, etc. in the domestic water, thereby improving the filtration effect of the domestic water, improving the quality of the domestic water, and making the domestic water more environmentally friendly and healthy during use.

[0013] Preferably, the second-stage filter element assembly includes an ultrafiltration cover and an ultrafiltration membrane filament, the ultrafiltration cover has a second cavity, the ultrafiltration membrane filament is accommodated in the second cavity, the outer wall of the upper cover close to one end of the lower cover is provided with an outer card groove, and the inner wall of the ultrafiltration cover is provided with an inner card groove, when the ultrafiltration cover is covered with the upper cover, the end of the ultrafiltration cover abuts against the bottom of the outer card groove, and the end of the upper cover abuts against the bottom of the inner card groove, so that the upper cover and the ultrafiltration cover are detachably connected; the lower cover is provided with a plurality of through holes, each of which is connected to the second cavity; and a water outlet is provided at the bottom of the ultrafiltration cover.

[0014] With the above technical means, the ultrafiltration membrane filaments are installed on the ultrafiltration cover and then disassembled and connected to the upper cover, which is convenient for installing the ultrafiltration membrane filaments. The ultrafiltration membrane filaments have better interception performance for impurities such as bacteria, and therefore can further improve the quality of domestic water.

[0015] Preferably, the material of the ultrafiltration membrane yarn is PS polysulfone material; the first mesh layer and the second mesh layer are both stainless steel meshes; the cotton layer is PP cotton; and the carbon fiber layer is a composite functional carbon fiber wire-wound filter element.

[0016] The above ultrafiltration membrane made of PS polysulfone material not only has good filtering effect, but also good durability, while the stainless steel mesh has high strength, can resist the impact of water, slow down the water flow, and intercept sand and gravel in the water. PP cotton is formed by processing a number of polyethylene fibers, has good strength, and can intercept or adsorb sand and gravel, impurities, etc.

[0017] The composite functional carbon fiber wire wound filter element has a better impurity connection effect, and can also adsorb bacteria, etc. More importantly, it can have a better adsorption effect on heavy metals and chlorides, thereby improving the water quality of domestic water after filtration.

[0018] Therefore, the carbon fiber filter element formed by assembling the above materials selected in the present application has multiple layers of adsorption of impurities, bacteria, heavy metals, chlorides and other organic matter, thereby further improving the filtering effect of water and improving the quality of water.

[0019] Preferably, the thickness of the carbon fiber layer is 20-30 mm.

[0020] The thickness of the above carbon fiber layer is selected as the preferred range for this application. The carbon fiber filter element assembled by combining the carbon fiber layer in the above thickness range with other layers has a better filtering effect, thereby improving the quality of water, especially for heavy metals, chlorides, etc., so that the quality of the obtained water is better.

[0021] Preferably, the composite functional carbon fiber wire-wound filter element is prepared by the following method:

[0022] The carbon fiber filaments are twisted to obtain a carbon fiber line; the carbon fiber line is then immersed in a treatment agent for 10-20 minutes, taken out, and dried for 10-50 seconds at a drying temperature of 80-120° C. to obtain a treated fiber line;

[0023] After the treated carbon fiber wire is wound, it is dried for 1-2 hours at a drying temperature of 95-98°C to obtain a composite functional carbon fiber wire-wound filter element.

[0024] By twisting the carbon fiber filaments to form a carbon fiber line, the structure of the line is easier to wind, and the treatment agent is used to treat the surface of the carbon fiber line to form a coating film. After drying for 10-50s at a drying temperature of 80-120°C, the coating film is not completely solidified and has a certain degree of adhesion. When winding, the superimposed carbon fiber lines adhere to each other stably, avoiding the winding process, and the winding structure is loose or scattered, improving the structural stability of the composite functional carbon fiber line wound filter element, and drying again, so that the coating film on the carbon fiber line is further solidified, so that the solvent is completely volatilized, and at the same time, the adjacent carbon fiber lines are adhered stably, further improving the structural stability of the composite functional carbon fiber line wound filter element. Therefore, when used for filtration, the carbon fiber layer structure is stable and has a better filtration effect, so that more heavy metals, chlorides, bacteria and other substances are fully removed, and the water quality of domestic water after filtration is further improved.

[0025] Preferably, the diameter of the carbon fiber filaments is 5-10 microns; and the gram weight of the carbon fiber wire is 1.8-3.2 g / m.

[0026] The wire diameter selection of the above carbon fiber filaments are all within the preferred range of this application. The carbon fibers within this fiber range are easy to be kneaded to form carbon fiber wires. The gram weight of the carbon fiber is selected to be within the preferred range of this application. The obtained composite functional carbon fiber wire-wound filter element has a better filtering effect, especially for heavy metals, chlorides, etc., thereby improving the quality of water after filtration.

[0027] Preferably, the treatment agent is composed of the following raw materials in parts by weight:

[0028] 20-30 parts of water-based hydroxylated acrylic dispersion resin

[0029] 2-5 parts of cross-linking curing agent

[0030] Nano zinc oxide 0.5-1 part

[0031] Nanosilver 0.1-0.3 parts

[0032] Carbon fiber powder 3-8 powder.

[0033] Nano zinc oxide and nano silver both have antibacterial effects, avoiding composite functional carbon fiber wire wound filter elements; carbon fiber powder has a better adsorption effect on heavy metals, chlorides, etc., and water-based hydroxyl acrylic dispersion resin is a dispersion of acrylic resin containing hydroxyl groups. Because it contains many hydroxyl groups, it can absorb better heavy metal substances, etc., and then with a cross-linking curing agent, the obtained treatment agent can not only stably adhere to the surface of the carbon fiber line to form a stable coating film, but also further improve the adsorption of heavy metal substances such as impurities. When using the filter element, it can further improve the filtering effect of the filter element.

[0034] Preferably, the water-based hydroxylated acrylic dispersion resin is prepared from the following raw materials in parts by weight:

[0035] 1-3 parts of trimethylolpropane tris(3-mercaptopropionic acid)

[0036] 1-3 parts of phenyl glycidyl ether acrylate

[0037] 3-5 parts of Hydroxyethyl Acrylate

[0038] Emulsifier 0.1-0.3 parts

[0039] Ammonium persulfate 0.1-0.3 parts

[0040] 1-3 parts of propylene glycol butyl ether

[0041] 5-10 parts water.

[0042] A water-based acrylic resin containing hydroxyl groups is formed by compounding trimethylolpropane tris(3-mercaptopropionic acid) ester, hydroxyethyl acrylate and phenyl glycidyl ether acrylate, and then a raw material system of a treating agent is added. The obtained treating agent is used in a carbon fiber filter element after being used to treat the carbon fiber line, thereby achieving a better filtering effect.

[0043] Preferably, the cross-linking curing agent is a combination of 3-isocyanate propyl triethoxy silane, N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane, and α-isocyanate methyl trimethoxy silane.

[0044] When 3-isocyanatepropyltriethoxysilane and N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane are compounded, or α-isocyanatemethyltrimethoxysilane and N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane are compounded, or 3-isocyanatepropyltriethoxysilane, N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane, α-isocyanatemethyltrimethoxysilane are compounded, etc., they can further cross-link with the water-based hydroxy acrylic dispersion resin to solidify it, and they all contain silane, therefore, they can improve the compatibility of nano zinc oxide, nano silver, and carbon fiber powder in the treatment agent raw material system, and the formed coating film has stable adhesion to the carbon fiber line.

[0045] At the same time, the amino group contained in N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane can have a better adsorption effect on heavy metals. Therefore, the prepared treatment agent is used to treat the carbon fiber wire. After winding, the winding structure of the obtained composite functional carbon fiber wire wound filter element is stable, and it has good adsorption of impurities such as heavy metals and chlorides, and has antibacterial effects, which further improves the filtering effect of the filter element and makes the filtered water quality better.

[0046] Preferably, the weight ratio of 3-isocyanatepropyltriethoxysilane, N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane and α-isocyanatemethyltrimethoxysilane is (2-6):1:(1-2).

[0047] When 3-isocyanatepropyltriethoxysilane, N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane and α-isocyanatemethyltrimethoxysilane are used for compounding, the effect is better. Therefore, the winding structure of the obtained composite functional carbon fiber wound filter element is stable and has a better filtering effect. After filtration, impurities such as chlorides, heavy metals, and bacteria in the water are reduced, thereby improving the quality of water.

[0048] In summary, this application has the following beneficial effects:

[0049] The present application adopts a multi-stage filter element composition to make water purification more thorough and cleaner. At the same time, the water is processed by the cotton layer, the second mesh layer, the carbon fiber layer, the first mesh layer and the non-woven fabric layer in sequence to further remove sandpaper particles, bacteria, impurities, etc. in the water. In particular, the carbon fiber layer can further remove ammonium chloride, heavy metals, chlorides, etc. in the water, further improving the water quality. Finally, it is filtered through the secondary filter element to further remove bacteria, impurities, etc. in the water, making the filtered water more environmentally friendly and of better quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the structure of a carbon fiber filter element;

[0051] Figure 2 It is a schematic diagram of the explosion structure of a carbon fiber filter element.

[0052] Description of reference numerals:

[0053] 1. Primary filter element assembly; 11. Upper cover; 111. Water inlet; 112. External card slot; 12. Lower cover; 121. Through hole; 131. Non-woven fabric layer; 132. First mesh layer; 133. Carbon fiber layer; 134. Second mesh layer; 135. Cotton layer; 2. Secondary filter element assembly; 21. Ultrafiltration cover; 22. Ultrafiltration membrane filament; 23. Internal card slot. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-2 The present application is further described in detail with reference to the accompanying drawings and embodiments.

[0055] The water-based hydroxylated acrylic dispersion resin is preferably Deyuder CX-826, with a solid content of 45%;

[0056] The cross-linking curing agent is a water-based isocyanate curing agent, the brand model of which is Covestro Bayhydur XP 2547, and the active ingredient content is 70%;

[0057] The preferred ultrafiltration membrane manufacturer is Kunshan Panqing Chemical Co., Ltd., with a membrane area of ​​0.17㎡;

[0058] The preferred stainless steel mesh manufacturer is Shenzhen Shengdi Wire Mesh Manufacturing Co., Ltd., 100 mesh XΦ40mm (single layer), thickness 0.2mm, stainless steel (SUS304), needs to pass 72H salt spray, food grade;

[0059] The preferred non-woven fabric manufacturer is Shenzhen Fitco Technology Co., Ltd. Material: non-woven fabric Φ40mm white, thickness 0.16mm, weight 30gsm;

[0060] The preferred PP cotton manufacturer is Shenzhen Fitco Technology Co., Ltd., material: HM-CX130G PP cotton, specification: φ42*thickness T=0.37-0.4mm;

[0061] The preferred manufacturer of wire-wound filter elements made of composite functional carbon fiber materials is Xiamen Ogle Water Purification Technology Co., Ltd., with dimensions of 42mm at the bottom, 42.5mm at the top, and 25mm in thickness;

[0062] The preferred brand of carbon fiber yarn is Korea's Toray.

[0063] Example

[0064] Example 1

[0065] A carbon fiber filter element, reference Figure 1 and Figure 2 , including a primary filter element assembly 1 and a secondary filter element assembly 2, the primary filter element includes an upper cover 11, a lower cover 12 and a first filter element, the upper cover 11 has a first cavity for accommodating the first filter element, the inner wall of the upper cover 11 is detachably connected to the lower cover 12, and the detachable method can be a threaded connection, for example, the inner wall of the upper cover 11 is provided with a first thread, and the outer wall of the lower cover 12 is provided with a second thread connected to the first thread. The above connection method is a common technology, so it will not be further described in detail.

[0066] The first filter element is provided with a non-woven fabric layer 131, a first mesh layer 132, a carbon fiber layer 133, a second mesh layer 134 and a cotton layer 135 in sequence from the end close to the lower cover 12. A water inlet 111 is provided at the top of the upper cover 11 away from the lower cover 12. When water is introduced, the water enters from the water inlet and then passes through the cotton layer 135, the second mesh layer 134, the carbon fiber layer 133, the first mesh layer 132 and the non-woven fabric layer 131 in sequence for filtration. In particular, the carbon fiber layer 133 has a better adsorption effect on organic substances such as heavy metals and chlorides, thereby further improving the filtering effect.

[0067] The second-stage filter element assembly 2 includes an ultrafiltration cover 21 and an ultrafiltration membrane filament 22. The ultrafiltration cover 21 has a second cavity for accommodating the ultrafiltration membrane filament 22. The outer wall of the upper cover 11 near one end of the lower cover 12 is provided with an outer card groove 112, and the inner wall of the ultrafiltration cover 21 is provided with an inner card groove 23. When the ultrafiltration cover 21 is covered with the upper cover 11, the end of the ultrafiltration cover 21 abuts against the bottom of the outer card groove 112, and the end of the upper cover 11 abuts against the bottom of the inner card groove 23, so that the upper cover 11 and the ultrafiltration cover 21 are covered and connected, thereby realizing a detachable connection; the lower cover 12 is provided with some There are a total of through holes 121, and each of the through holes 121 is connected to the second cavity; a water outlet is provided at one end of the ultrafiltration cover 21 away from the upper cover 11. After the water is filtered through the non-woven fabric, it flows into the inner wall of the second cavity through the through holes 121, and then is filtered through the ultrafiltration membrane filaments 22 inside the second cavity before being discharged through the water outlet. In this process, the water is filtered through multiple stages of filter elements to remove dirt, impurities, heavy metals, bacteria, vacuum, single-cell organisms, etc. in the water, and then filtered multiple times to make the quality of the filtered water better.

[0068] The material of the ultrafiltration membrane filament 22 is PS polysulfone material; the first mesh layer 132 and the second mesh layer 134 are both stainless steel meshes; the cotton layer 135 is PP cotton; and the carbon fiber layer 133 is a composite functional carbon fiber wire-wound filter element.

[0069] The thickness of the carbon fiber layer 133 may be 20 mm, 25 mm or 30 mm, and is preferably 25 mm in this embodiment.

[0070] Example 2

[0071] The difference between Example 2 and Example 1 is that the composite functional carbon fiber wire-wound filter element is prepared by the following method: carbon fiber filaments with a wire diameter of 5 microns are twisted to obtain a carbon fiber wire with a gram weight of 1.8 g / m; the carbon fiber wire is conveyed to a tank immersed in a treatment agent by a conveying device and immersed for 10 minutes; after taking it out, it is placed in an oven for drying for 10 seconds at a drying temperature of 120°C to obtain a treated fiber wire.

[0072] The treated fiber line is wound, and after the winding is completed, a semi-finished product is obtained, and then the semi-finished product is dried under reduced pressure. Specifically, the semi-finished product is placed in a vacuum dryer and dried for 1 hour under a vacuum gauge showing -0.1MPa. The drying temperature is 98°C, and all the solvents contained in the semi-finished product are removed. At this time, a coating film with an average thickness of about 10 microns is formed on the surface of the treated fiber, and a composite functional carbon fiber wire-wound filter element is obtained.

[0073] The acquisition scheme of the treatment agent is as follows:

[0074] 20 kg of water-based hydroxy acrylic dispersion resin, 2 kg of cross-linking curing agent, 0.5 kg of nano zinc oxide, 0.1 kg of nano silver, and 3 kg of carbon fiber powder were weighed and mixed, and stirred at a rotation speed of 40 r / min for 30 minutes to obtain a treating agent.

[0075] Example 3

[0076] The difference between Example 3 and Example 2 is that the composite functional carbon fiber wire-wound filter element is prepared by the following method: carbon fiber filaments with a wire diameter of 8 microns are twisted to obtain a carbon fiber wire with a gram weight of 2.5 g / m; the carbon fiber wire is conveyed by a conveying device to a tank immersed in a treatment agent, immersed for 15 minutes, and after being taken out, it is placed in an oven for drying for 30 seconds at a drying temperature of 100°C to obtain a treated fiber wire.

[0077] The treated fiber line is wound, and after the winding is completed, a semi-finished product is obtained, and then the semi-finished product is dried under reduced pressure. Specifically, the semi-finished product is placed in a vacuum dryer and dried for 2 hours under a vacuum gauge showing -0.1MPa. The drying temperature is 95°C, and all the solvents contained in the semi-finished product are removed. At this time, a coating film with an average thickness of about 10 microns is formed on the surface of the treated fiber, and a composite functional carbon fiber wire-wound filter element is obtained.

[0078] The acquisition scheme of the treatment agent is as follows:

[0079] 25 kg of water-based hydroxy acrylic dispersion resin, 4 kg of cross-linking curing agent, 0.8 kg of nano zinc oxide, 0.2 kg of nano silver, and 5 kg of carbon fiber powder were weighed and mixed, and stirred at a rotation speed of 40 r / min for 30 minutes to obtain a treating agent.

[0080] Example 4

[0081] The difference between Example 4 and Example 2 is that the composite functional carbon fiber wire-wound filter element is prepared by the following method: carbon fiber filaments with a wire diameter of 10 microns are twisted to obtain a carbon fiber wire with a gram weight of 3.2 g / m; the carbon fiber wire is conveyed by a conveying device to a tank immersed in a treating agent for 20 minutes. After being taken out, it is placed in an oven for drying for 30 seconds at a drying temperature of 100°C to obtain a treated fiber wire.

[0082] The treated fiber line is wound, and after the winding is completed, a semi-finished product is obtained, and then the semi-finished product is dried under reduced pressure. Specifically, the semi-finished product is placed in a vacuum dryer and dried for 2 hours under a vacuum gauge showing -0.1MPa. The drying temperature is 96°C, and all the solvents contained in the semi-finished product are removed. At this time, a coating film with an average thickness of about 10 microns is formed on the surface of the treated fiber, and a composite functional carbon fiber wire-wound filter element is obtained.

[0083] The acquisition scheme of the treatment agent is as follows:

[0084] 30 kg of water-based hydroxy acrylic dispersion resin, 5 kg of cross-linking curing agent, 1 kg of nano zinc oxide, 0.3 kg of nano silver, and 8 kg of carbon fiber powder were weighed and mixed, and stirred at a rotation speed of 40 r / min for 30 minutes to obtain a treating agent.

[0085] Example 5

[0086] The difference between Example 5 and Example 3 is that the cross-linking curing agent consists of 1 kg of N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane and 3 kg of 3-isocyanatepropyltriethoxysilane.

[0087] The water-based hydroxylated acrylic dispersion resin is prepared by the following method:

[0088] Weigh 1kg of phenyl glycidyl ether acrylate and 3kg of hydroxyethyl acrylate and put them into a reactor. Under the protection of nitrogen, heat to 70°C, stir at a speed of 30r / min for 10min, and add 1kg of trimethylolpropane tris(3-mercaptopropionate), 0.1kg of emulsifier, 0.1kg of ammonium persulfate, 1kg of propylene glycol butyl ether, and 5kg of water. React for 2h, then add sodium hydroxide and adjust the pH to 7.5 to obtain a water-based hydroxy acrylic dispersion resin.

[0089] Example 6

[0090] The difference between Example 6 and Example 5 is that the cross-linking curing agent consists of 1 kg N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane and 3 kg 3-isocyanate propyltriethoxysilane. The water-based hydroxylated acrylic dispersion resin is prepared by the following method:

[0091] Weigh 2kg of phenyl glycidyl ether acrylate and 4kg of hydroxyethyl acrylate and put them into a reactor. Under the protection of nitrogen, heat to 70°C, stir at a speed of 30r / min for 10min, and add 2kg of trimethylolpropane tris(3-mercaptopropionate), 0.2kg of emulsifier, 0.2kg of ammonium persulfate, 2kg of propylene glycol butyl ether, and 7kg of water. React for 2h, then add sodium hydroxide and adjust the pH to 7.5 to obtain a water-based hydroxy acrylic dispersion resin.

[0092] Example 7

[0093] The difference between Example 7 and Example 5 is that the cross-linking curing agent consists of 1 kg N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane and 3 kg 3-isocyanate propyltriethoxysilane. The water-based hydroxylated acrylic dispersion resin is prepared by the following method:

[0094] Weigh 3kg of phenyl glycidyl ether acrylate and 5kg of hydroxyethyl acrylate and put them into a reactor. Under the protection of nitrogen, heat to 70°C, stir at a speed of 30r / min for 10min, add 3kg of trimethylolpropane tris(3-mercaptopropionate), 0.3kg of emulsifier, 0.3kg of ammonium persulfate, 3kg of propylene glycol butyl ether, and 10kg of water, react for 2h, then add sodium hydroxide and adjust the pH to 7.5 to obtain a water-based hydroxy acrylic dispersion resin.

[0095] Example 8

[0096] The difference between Example 8 and Example 6 is that the cross-linking curing agent is composed of 2kg 3-isocyanate propyl triethoxy silane, 1kg N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane, and 1kg α-isocyanate methyl trimethoxy silane.

[0097] Example 9

[0098] The difference between Example 9 and Example 6 is that the cross-linking curing agent is composed of 2.5 kg 3-isocyanate propyl triethoxy silane, 0.5 kg N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane, and 1 kg α-isocyanate methyl trimethoxy silane.

[0099] Example 10

[0100] The difference between Example 10 and Example 3 is that the cross-linking curing agent is composed of 3kg 3-isocyanate propyl triethoxy silane, 0.5kg N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane, and 0.5kg α-isocyanate methyl trimethoxy silane.

[0101] Performance testing

[0102] Detection method / test method

[0103] The carbon fiber filter element and the ceramic filter element obtained in Example 2-10 were installed in the corresponding filters, and then the domestic water was filtered respectively, with a filtration rate of 2mim / L and a filtration time of 30min. The obtained filtrates were tested as follows, and the domestic water was also tested as follows before use. Among them, the ceramic filter element (filtration accuracy 2-5um; product size φ40.5*93mm; wall thickness: 8.5mm, water outlet speed 2L / min (0.1-0.4Mpa), product weight: 45g;) was used as the control group.

[0104] Water quality testing refers to the national GB / T 5749-2022 "Sanitary Standard for Drinking Water", GB / T57503, GB / T 5750.4-GB / T 5750.13 for testing; when Escherichia coli / (MPN / 100mL) and Escherichia coli / (MPN / 100mL) are not detected, it is recorded as qualified, and if detected, it is recorded as unqualified; the total colony count / (MPN / mL) is less than 100; the heavy metal content refers to the sum of the contents of nickel, chromium and lead, and the nickel / chromium / lead / (mg / L) content is less than 0.01mg / L; chloride (mg / L) is less than 250mg / L.

[0105] Table 1 Experimental data of Examples 2-9 and the control group

[0106]

[0107]

[0108] Combining Examples 2-10 and the control group and Table 1, it can be seen that the heavy metal content, chloride content, and total colony count of Examples 2-10 are higher than those of the control group, indicating that the carbon fiber filter element prepared by the present application has a better filtering effect.

[0109] By comparing Example 2 with Examples 5-10 and combining with Table 1, it can be seen that the heavy metal content, chloride content, and total colony count of Examples 5-10 are all higher than those of Example 2, indicating that the aqueous hydroxylated acrylic dispersion resin prepared by the present application, combined with the curing cross-linking agent of the present application, thereby obtaining a treatment agent used in a carbon fiber filter element, has a better filtering effect, especially for heavy metals and chlorides.

[0110] By comparing Example 6 with Examples 8-10 and combining with Table 1, it can be seen that the heavy metal content, chloride content and total colony count of Examples 8-10 are lower than those of Example 6, indicating that the treatment agent obtained by compounding isocyanate propyl triethoxysilane, N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane and α-isocyanate methyl trimethoxy silane is used to treat carbon fiber, so that the obtained carbon fiber filter element has a better filtering effect.

[0111] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A carbon fiber filter element, comprising a primary filter element assembly (1) and a secondary filter element assembly (2), wherein the output end of the primary filter element assembly (1) is connected to the input end of the secondary filter element assembly (2), the primary filter element assembly (1) comprises an upper cover (11), a lower cover (12) and a first filter element, the upper cover (11) has a first cavity, the first filter element is accommodated in the first cavity, the inner wall of the upper cover (11) is detachably connected to the lower cover (12), the upper cover (11) is provided with a water inlet (111), the secondary filter element assembly (2) is detachably connected to the outer wall of the upper cover (11), and the characteristics are as follows: The first filter element is provided with a non-woven fabric layer (131), a first mesh layer (132), a carbon fiber layer (133), a second mesh layer (134) and a cotton layer (135) in sequence from one end close to the lower cover (12); The secondary filter element assembly (2) comprises an ultrafiltration cover (21) and an ultrafiltration membrane filament (22), wherein the ultrafiltration cover (21) has a second cavity, wherein the ultrafiltration membrane filament (22) is accommodated in the second cavity, wherein an outer wall of the upper cover (11) close to one end of the lower cover (12) is provided with an outer card groove (112), and an inner wall of the ultrafiltration cover (21) is provided with an inner card groove (23), wherein when the ultrafiltration cover (21) and the upper cover (11) are covered, the end of the ultrafiltration cover (21) abuts against the bottom of the outer card groove (112), and the end of the upper cover (11) abuts against the bottom of the inner card groove (23), so that the upper cover (11) and the ultrafiltration cover (21) are detachably connected; the lower cover (12) is provided with a plurality of through holes (121), and each of the through holes (121) is connected to the second cavity; and a water outlet is provided at the bottom of the ultrafiltration cover (21); The material of the ultrafiltration membrane yarn (22) is PS polysulfone material; the first mesh layer (132) and the second mesh layer (134) are both stainless steel meshes; the cotton layer (135) is PP cotton; the carbon fiber layer (133) is a composite functional carbon fiber wire-wound filter element; The composite functional carbon fiber wire-wound filter element is prepared by the following method: The carbon fiber filaments are twisted to obtain a carbon fiber line; the carbon fiber line is then immersed in a treatment agent for 10-20 minutes, taken out, and dried for 10-50 seconds at a drying temperature of 80-120° C. to obtain a treated fiber line; After the treated carbon fiber wire is wound, it is dried for 1-2 hours at a drying temperature of 95-98°C to obtain a composite functional carbon fiber wire wound filter element; The treatment agent is composed of the following raw materials in parts by weight: 20-30 parts of water-based hydroxylated acrylic dispersion resin 2-5 parts of cross-linking curing agent Nano zinc oxide 0.5-1 part Nanosilver 0.1-0.3 parts 3-8 parts of carbon fiber powder; The water-based hydroxylated acrylic dispersion resin is prepared from the following raw materials in parts by weight: 1-3 parts of trimethylolpropane tris(3-mercaptopropionic acid) 1-3 parts of phenyl glycidyl ether acrylate 3-5 parts of Hydroxyethyl Acrylate Emulsifier 0.1-0.3 parts Ammonium persulfate 0.1-0.3 parts 1-3 parts of propylene glycol butyl ether 5-10 parts water.

2. A carbon fiber filter element according to claim 1, characterized in that: The thickness of the carbon fiber layer (133) is 20-30 mm.

3. A carbon fiber filter element according to claim 1, characterized in that: The diameter of the carbon fiber filament is 5-10 microns; the weight of the carbon fiber line is 1.8-3.2 g / m.

4. A carbon fiber filter element according to claim 1, characterized in that: The cross-linking curing agent is a variety of compositions selected from 3-isocyanate propyl triethoxy silane, N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane and α-isocyanate methyl trimethoxy silane.

5. A carbon fiber filter element according to claim 4, characterized in that: The weight ratio of the 3-isocyanate propyl triethoxysilane, N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane and α-isocyanate methyl trimethoxy silane is (2-6):1:(1-2).

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