Method for manufacturing filter element of carbon fiber filtering compound material

Abstract

The invention discloses a method for manufacturing a filter element made of a carbon fiber filtering compound material, which comprises the following steps of: preparing a carbon fiber filtering compound material solution, preparing a filter element net cylinder, putting the carbon fiber filtering compound material solution into a cylinder body, arranging sealed liquid pumping devices at two ends of the filter element net cylinder, integrally immersing the filter element net cylinder into the solution, and pumping the liquid to obtain the filter element made of the carbon fiber filtering compound material. Absorbing the carbon fiber filtering compound material to the surface of the non-woven fabric to integrally form a first filter element, extruding, drying and wrapping the first filter element with the non-woven fabric to form a third filter element, and arranging a mesh bag and an end cover on the filter element made of the carbon fiber filtering compound material; a carbon fiber compound adsorption material solution is prepared, materials are extracted, sucked and planted to the surface of a filter element net cylinder through a device, the process flow is short, the overall structure of the filter element is compact, a seamless interface is formed in the surface, effective active materials such as carbon fibers of each carbon fiber filter element are increased, the structural strength of the filter element is effectively improved, and the service life of the filter element is prolonged. And the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the field of adsorption materials, and in particular to a method for manufacturing a filter element of a carbon fiber filtering composite material. Background Art

[0002] A filter element is a device used to purify fluids. It is widely used in water filtration, air filtration, oil filtration and other fields. Its main function is to remove chemicals, impurities, particles, bacteria, etc. from the fluid to improve the cleanliness of the fluid.

[0003] Generally speaking, the electroplating solution filter element used in the electroplating industry adopts activated carbon or carbon fiber composite material filter element, which can effectively filter out organic pollutants, inorganic pollutants, dry film or wet film dissolved substances, photoagent decomposition products, invalid photoagent and other impurities in the solution, improve the purity of the solution, adjust the total nitrogen content and total carbon content of the solution, thereby improving the quality of electroplating processing.

[0004] At present, two process methods are generally used to make this type of filter element. One is to first make the activated carbon or carbon fiber composite material into filter cloth or filter cotton through papermaking or other methods, and then wrap it around the filter mesh cylinder in the center to form a filter element structure; the other is to make the activated carbon or carbon fiber composite material into filter cloth or filter cotton, and then fill it into the outer shell of the cylindrical structure to form a filter element.

[0005] The above two process methods are to first make the activated carbon or carbon fiber composite material into a filter cloth or filter cotton with a specific structural form through papermaking or other methods, and then further process it. The filter element made in this way has the problems of long manufacturing process and complicated flow, that is, first making the filter cloth or filter cotton, which is a relatively complicated manufacturing process, and then setting the filter cloth or filter cotton in the filter net cylinder or outer shell, which is another relatively complicated process, resulting in a long processing time; and, in the process of setting the filter cloth or filter cotton in the filter net cylinder or outer shell, the filter cloth or filter cotton must first be cut into the required size to ensure the uniformity and consistency of the size. During the cutting process, some materials will inevitably become waste, resulting in material waste and increased processing material costs; in addition, when the filter cloth or filter cotton is set in the filter net cylinder or outer shell, there is a loose interface gap, and there are still problems of interface water seepage and unclean filtration during the application process, and problems such as interface treatment time lapse, and there is also a risk of poor filtration.

[0006] Based on the above background and problems, it is necessary to provide a method for manufacturing a filter element of a carbon fiber filter composite material with a relatively simple manufacturing process and good filter element effect. Summary of the invention

[0007] The present invention aims to solve the problems of the prior art that activated carbon or carbon fiber composite materials are firstly made into a specific structural form of filter cloth or filter cotton by papermaking or other methods, and then rolled on a filter net cylinder or in an outer shell, which has the problems of poor processing interface position and overall structure, long processing process, complicated process, high material waste cost, poor filtering effect, and less effective filtering material in each filter element, and provides a method for manufacturing a filter element of a carbon fiber filter composite material, the filter element manufacturing method comprising the following steps: S10: Preparing carbon fiber filtration composite material solution: The polyacrylonitrile-based carbon fiber, the low-melting point adhesive fiber, the polyvinyl alcohol fiber and the polyacrylamide are mixed and stirred to form a carbon fiber filtration composite material, and deionized water is added and stirred to prepare the carbon fiber filtration composite material solution; S20: Preparation of filter element mesh cylinder: Take a cylindrical plastic mesh cylinder, wrap the first non-woven fabric on its surface to form a filter element mesh cylinder; S30: placing the carbon fiber filtration composite material solution in a cylinder and stirring it continuously, setting sealed liquid pumping devices at both ends of the filter element mesh cylinder, and immersing the filter element mesh cylinder as a whole in the carbon fiber filtration composite material solution, using the sealed liquid pumping device to pump liquid, and absorbing the carbon fiber filtration composite material onto the surface of the first non-woven fabric to form a first filter element as a whole; S40: extruding the surface of the first filter element to squeeze out the deionized water in the carbon fiber filtration composite material to form a second filter element; S50: drying the second filter element, and then wrapping a second non-woven fabric on the outer surface to form a third filter element; S60: sequentially putting a mesh bag on the third filter element and installing an end cap to form a filter element of the carbon fiber filtration composite material.

[0008] Furthermore, the preparation of the carbon fiber filtration composite material solution also includes: adding activated carbon powder, diatomaceous earth and coniferous wood pulp fiber to the carbon fiber filtration composite material, mixing and stirring, and adding deionized water, stirring to prepare the carbon fiber filtration composite material solution.

[0009] Furthermore, the volume concentration of the carbon fiber filtration composite material solution is 5% to 20%.

[0010] Furthermore, the material of the cylindrical plastic mesh tube is one of PP, PVC, PET, and PTFE; the mesh density of the cylindrical plastic mesh tube is: 0.5 mesh to 20 mesh; the Rockwell hardness is: 48 to 120; and the high temperature resistance temperature is: 80°C to 150°C.

[0011] Furthermore, the liquid pumping device includes a support column, a clamping end, a support arm, a pressing mechanism, a lifting mechanism, a liquid pumping pipeline, and a liquid pump. The clamping end seal is clamped at both ends of the filter element mesh cylinder, and the installation form of the filter element mesh cylinder is parallel to the liquid surface of the carbon fiber filtration composite material solution; The engaging end is mounted on one end of the support arm, the other end of the support arm is mounted on the pressing mechanism, the pressing mechanism is mounted on the lifting mechanism, and the lifting mechanism is mounted on the support column; One end of the liquid extraction pipeline is connected to the clamping end, and the other end is connected to the liquid extraction pump; The liquid discharge port of the liquid pump is connected to the cylinder body; The process of forming the first filter element through S30 is as follows: Install the two ends of the filter element mesh cylinder onto the clamping ends, The clamping end is pressed against the two ends of the filter element mesh cylinder by the pressing mechanism. The filter element mesh cylinder is immersed in its entirety into the carbon fiber filtration composite material solution through the lifting mechanism. The liquid pump is turned on to pump the carbon fiber filtration composite material solution onto the filter element mesh cylinder through the liquid pumping pipeline, so that the carbon fiber filtration composite material is absorbed onto the surface of the first non-woven fabric. After the suction is completed, the liquid pump is turned off. The filter element net cylinder is lifted out by the lifting mechanism. Release the pressing mechanism, and then release the supporting arm and the engaging end, and remove the first filter element.

[0012] Furthermore, the negative pressure of the liquid extraction is 2.0kPa to 20.0kPa; after the liquid extraction process is completed, the thickness of the carbon fiber filtration composite material attached to the surface of the first filter element is 5mm to 30mm, and the density is 0.07g / cm3 and 0.80g / cm3.

[0013] Furthermore, the material of the first non-woven fabric or the second non-woven fabric is one of polyester non-woven fabric, polypropylene non-woven fabric, nylon non-woven fabric, and vinylon.

[0014] Furthermore, the first non-woven fabric or the second non-woven fabric has a thickness of 0.5 mm to 3.0 mm and a density of 5.0 g / ㎡ to 50.0 g / ㎡.

[0015] Furthermore, the first filter element surface is extruded by using double rollers or triple rollers.

[0016] Furthermore, the drying is performed at a temperature of 100° C. to 150° C. for 120 minutes to 240 minutes.

[0017] The present invention prepares a carbon fiber composite adsorption material into a carbon fiber filtration composite material solution, and then directly absorbs the carbon fiber filtration composite material onto the surface of the filter element mesh cylinder by setting a direct liquid extraction device. Compared with the prior art method of first preparing activated carbon or carbon fiber composite materials into filter cloth or filter cotton by papermaking or other methods, and then winding it on the filter mesh cylinder or in an outer shell, the present invention has the advantages of shortening the processing process, making the processing more convenient, greatly reducing the material cost, increasing the effective carbon fiber amount of each filter element, and making the overall structure compact, and not requiring the processing interface; and the carbon fiber filtration composite material solution uses the carbon fiber component to realize the main adsorption function, and the adhesive The material components realize the function of forming an overall filter layer structure after being adsorbed, the reinforcing and dispersing function of the polyvinyl alcohol fiber, and the gel function of polyacrylamide, forming a solution that can effectively pass through the pumping and attachment processing properties, and by setting up a unique pumping device, a strong, uniform and controllable adsorption process is formed in which the carbon fiber filtration compound material solution is attached to the surface of the filter element mesh tube. After the adsorption is completed, the adsorption material layer is flattened by flattening, and the adsorption material layer is effectively shaped by drying, forming a standard form that can be directly applied in structure; the overall processing process realizes specific process flow, effectively reduces processing costs, and improves the filtering effect and service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 This is a flow chart of a method for making a filter element of a carbon fiber filter composite material in this embodiment; Figure 2 Schematic diagram of the structural principle of the liquid pumping device in this embodiment.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] See also Figure 1 , Figure 1 This is a flow chart of a method for making a filter element of a carbon fiber filtration composite material in this embodiment.

[0025] This embodiment provides a method for manufacturing a filter element of a carbon fiber filter composite material, comprising the following steps: Step S10: Preparation of carbon fiber filtration composite material solution: polyacrylonitrile-based carbon fiber, low-melting point adhesive fiber, polyvinyl alcohol fiber and polyacrylamide are mixed and stirred to form a carbon fiber filtration composite material, and deionized water is added and stirred to prepare a carbon fiber filtration composite material solution.

[0026] Among them, the polyacrylonitrile-based carbon fiber uses short-cut fiber filaments with a length of between 2 mm and 10 mm, which can provide a fiber filament material basis that is easier to combine for the subsequent formation of the absorption layer, and facilitate bonding to form a filtering layered structure.

[0027] Polyacrylonitrile-based carbon fiber can effectively adsorb inorganic matter, organic matter, ineffective light agent and other organic impurities and floating matter, has good adsorption and decolorization effects, and is a key component of the carbon fiber filtration composite material of this embodiment.

[0028] The low-melting-point adhesive fiber has a certain adhesion effect. In this embodiment, 4080 fiber or Japanese Kerila PVA-105 fiber can be selected, and components such as methyl methacrylate, methacrylic acid, butyl acrylate, acrylic acid and ethanol can be compounded, and deionized water is added for mixing to form a low-melting-point adhesive fiber solution (volume concentration is 2% to 8%, preferably 5%), which is dissolved in the carbon fiber filtration compound material to provide the material with the viscosity ability for the subsequent liquid extraction to form an adsorption layer processing process, to prevent the composite material layer from scattering after the liquid extraction and adsorption processing, and at the same time, it can provide the filter element with the phenomenon of adsorbing impurities through polyacrylonitrile-based carbon fiber to adhere and lock the impurities to prevent reverse "escape"; the low-melting-point adhesive fiber also has the function of forming a three-dimensional network structure with other components when baked at high temperature, and can maintain the three-dimensional network structure unchanged after cooling to room temperature or below, and has a larger adsorption area (larger specific surface area).

[0029] Polyvinyl alcohol fiber has strong tensile force. Using 2mm to 10mm polyvinyl alcohol fiber can be evenly dispersed in aqueous solution, which can effectively improve the tensile strength of carbon fiber filtration compound materials, thereby improving the material's processability into layers and the durability of the finished filter element during use.

[0030] Polyacrylamide has a good gelling effect, which can enable the carbon fiber composite material to be formed during the extraction and implantation process. It can also enhance the adsorption capacity during the use of the filter element and lock the adsorbed impurities to prevent "escape".

[0031] In this embodiment, the carbon fiber filtration composite material solution is prepared, which also includes: adding activated carbon powder, diatomaceous earth and coniferous wood pulp fiber to the carbon fiber filtration composite material, mixing and stirring, and adding deionized water, stirring to prepare the carbon fiber filtration composite material solution.

[0032] Activated carbon powder and diatomaceous earth can make up for the adsorption range that polyacrylonitrile-based carbon fiber cannot cover, and can further improve the adsorption capacity of carbon fiber filtration compound materials. Coniferous wood pulp fiber uses 2mm to 10mm short-cut fibers with strong tensile and traction forces, which can improve the overall extractable layering of carbon fiber filtration compound materials and prevent slag falling, while also having its own adsorption capacity.

[0033] In this embodiment, the volume concentration of the carbon fiber filtration compound material solution is 5% to 20%, preferably 10%; this concentration range can provide good stirring and implantable solution conditions for subsequent liquid extraction and layering processing.

[0034] Step S20: Prepare a filter element mesh cylinder: take a cylindrical plastic mesh cylinder, wrap a first non-woven fabric on its surface to form a filter element mesh cylinder; in this embodiment, the material of the cylindrical plastic mesh cylinder is one of PP, PVC, PET, and PTFE, and the mesh density of the cylindrical plastic mesh cylinder is: 0.5 mesh to 20 mesh, preferably 10 mesh; Rockwell hardness is: 48 to 120; preferably 60; high temperature resistance temperature is: 80°C to 150°C, preferably 120°C.

[0035] The plastic mesh cylinder is a filter element mesh cylinder, which is a support for the filter element and a flow channel for the filtered liquid. In this embodiment, a first non-woven fabric is first wrapped on the plastic mesh cylinder. Polyester non-woven fabric, polypropylene non-woven fabric, nylon non-woven fabric, and vinylon non-woven fabric can be used. The thickness of the first non-woven fabric is 0.5mm to 3.0mm, and the density of the first non-woven fabric is 5.0g / ㎡ to 50.0g / ㎡. The wrapping method can be pasting, silk thread winding, etc., so that the first non-woven fabric is completely wrapped on the filter element mesh cylinder, thereby providing a material layer foundation for the attachment of the carbon fiber filtration compound material for the subsequent liquid extraction and layering processing.

[0036] Step S30: A carbon fiber filtration compound material solution is placed in a cylinder and stirred continuously. A sealed liquid extraction device is installed on both ends of the filter element mesh tube, and the filter element mesh tube is immersed in the carbon fiber filtration compound material solution. The sealed liquid extraction device is used to extract the liquid, and the carbon fiber filtration compound material is absorbed onto the surface of the first non-woven fabric to form a first filter element as a whole.

[0037] In the present embodiment, a method of pumping liquid into layers is used, and a device is set up to pump the carbon fiber filter compound material directly to the surface of the first non-woven fabric. By controlling the pressure and time of the liquid pumping, a carbon fiber filter compound material layer of required thickness is formed, which replaces the existing production method of first making activated carbon or carbon fiber composite materials into filter cloth or filter cotton through papermaking or other methods, and then setting it on the filter mesh cylinder or in the outer shell. The formed carbon fiber filter compound material layer is fully formed in one go, and the formed filter layer is tightly combined with the first non-woven fabric. The overall structure is tight, which increases the amount of effective carbon fiber in each filter element, and the filter layer itself has higher integrity. There is no problem of interface lamination or poor density. A more uniform and reliable filtration effect can be formed during the filtration process, and there is no need to worry about interface leakage, low filtration efficiency, incomplete filtration and other problems.

[0038] See also Figure 2 , Figure 2 This is a physical picture of the liquid pumping equipment in this embodiment.

[0039] In this embodiment, the liquid pumping device includes a support column, a clamping end, a support arm, a pressing mechanism, a lifting mechanism, a liquid pumping pipeline, and a liquid pump. The clamping end is sealed and clamped at both ends of the filter element mesh tube, and the installation form of the filter element mesh tube is parallel to the liquid surface of the carbon fiber filtration compound material solution; the clamping end is installed at one end of the support arm, and the other end of the support arm is installed on the pressing mechanism, the pressing mechanism is installed on the lifting mechanism, and the lifting mechanism is installed on the support column; one end of the liquid pumping pipeline is connected to the clamping end, and the other end is connected to the liquid pump; the discharge port of the liquid pump is connected to the cylinder body.

[0040] The process of forming the first filter element through step S30 is as follows: Install both ends of the filter element mesh cylinder onto the engaging ends, press the engaging ends to both ends of the filter element mesh cylinder through the pressing mechanism, immerse the entire filter element mesh cylinder into the carbon fiber filtration compound material solution through the lifting mechanism, turn on the liquid pump, and pump the carbon fiber filtration compound material solution onto the filter element mesh cylinder through the liquid pumping pipeline, so that the carbon fiber filtration compound material is absorbed and implanted onto the surface of the first non-woven fabric. After the absorption and implantation is completed, turn off the liquid pump, lift the filter element mesh cylinder through the lifting mechanism, release the pressing mechanism, and link the support arm and the engaging end to remove the first filter element.

[0041] The liquid extraction device provided in this embodiment can meet the processing requirements of semi-automatic or automatic liquid extraction and layering. The device realizes the orderly completion of each action step through electrification, forming "engaging the filter element mesh cylinder → immersing in solution → extracting liquid → lifting the filter element mesh cylinder after extraction → removing the first filter element". Since the carbon fiber filtration compound material solution is in liquid state, direct contact with human body needs to be avoided. Therefore, the above device is provided to effectively realize the entire liquid extraction and layering processing process.

[0042] It is worth mentioning that the engaging end can be configured to have a rubber or soft plastic end that is complementary and engageable with the two ends of the filter element mesh tube. When engaged, the engaging end engages the two ends of the filter element mesh tube, and a part of the two ends of the first non-woven fabric is engaged into the engaging end, so that the first non-woven fabric covered area of ​​the filter element mesh tube forms an effective channel for liquid extraction, providing a basis for subsequent liquid extraction processing; or, the engaging end can also be configured to penetrate into a part of the interior of the hollow area of ​​the filter element mesh tube, and the part that does not penetrate has a structure that also has the function of top-engaging the two ends of the filter element mesh tube, so that when the filter element mesh tube is in the liquid extraction process, the carbon fiber filtration compound material can fully cover the first non-woven fabric.

[0043] It is worth noting that a stirring device is also provided at the bottom of the cylinder body to stir the carbon fiber filtration compound material solution to form a uniform solution system, facilitate the liquid extraction and layer processing, and prevent the solution from precipitating and condensing.

[0044] In this embodiment, the negative pressure of the liquid extraction is 2.0kPa to 20.0kPa; after the liquid extraction process is completed, the thickness of the carbon fiber filter composite material attached to the surface of the first filter element is 5mm to 30mm, and the density is 0.07g / cm 3 and 0.80g / cm 3 .

[0045] By controlling the pressure and time of liquid extraction, the coverage thickness and density (compactness) of the carbon fiber filter compound material layer can be adjusted to form filter element products with different filtering effects for different application scenarios.

[0046] S40: extruding the surface of the first filter element to squeeze out the deionized water in the carbon fiber filtration composite material to form a second filter element; in this embodiment, extruding the surface of the first filter element is performed using a double roller or a triple roller.

[0047] The middle layer of the carbon fiber filtration compound material on the surface of the first filter element formed by the liquid extraction and layering process contains more water and needs to be dried. If it is dried directly, it is easy to cause water splashing and pollute the workshop and the drying equipment. Therefore, it is necessary to adopt an extrusion method to squeeze out most of the water first; the extrusion can be achieved by setting the first filter element on a fixed seat and adopting a double-roller rolling extrusion method, or by directly placing the first filter element on a three-roller extrusion device for direct rolling extrusion.

[0048] Step S50: The second filter element is dried at a temperature of 100°C to 150°C for 120 minutes to 240 minutes, and then the second non-woven fabric is wrapped on the outer surface to form a third filter element; the inner surface of the second non-woven fabric is a fleece surface, and the outer surface is a smooth surface, which can form a tight bond with the carbon fiber filtration compound material layer to prevent the second non-woven fabric from detaching and stratifying during application, thereby hiding the filtered solution.

[0049] After the above-mentioned extrusion process, most of the moisture is discharged, and based on the formula of the adsorption material, a drying process is performed to form a network structure of the filter element from a physical point of view, similar to the network structure of a loofah, and the remaining moisture is discharged at the same time. From a chemical point of view, cross-linking polymerization, grafting copolymerization and other reactions occur between some components, so that the carbon fiber filtration compound material layer forms an integral layer from a physical and chemical point of view, and the content of effective adsorption components is high, which greatly improves the adsorption effect and efficiency, and avoids the problem of filter layer residue falling off during drying, resulting in less effective adsorption components, and the like.

[0050] In this embodiment, the material of the second non-woven fabric is one of polyester non-woven fabric, polypropylene non-woven fabric, nylon non-woven fabric, and vinylon non-woven fabric; the thickness of the second non-woven fabric is 0.5 mm to 3.0 mm, and the density of the second non-woven fabric is 5.0 g / ㎡ to 50.0 g / ㎡.

[0051] In order to further prevent the problem of reverse "escape" of impurities from the filter element during application, and to prevent the filter layer material itself from scattering due to long-term immersion, a second non-woven fabric is wrapped around the outer layer. The second non-woven fabric can be directly made into a cylindrical structure of a fixed size and wrapped around the surface of the filter layer. It can also be wrapped and then the interface is processed. The interface processing can be carried out by adhesive adhesion, silk thread winding, or multi-layer wrapping.

[0052] Similar to the first non-woven fabric, any suitable type of non-woven fabric may be used. It is worth noting that, in order to keep the overall filtration in a balanced state, preferably, the first non-woven fabric and the second non-woven fabric are made of the same material.

[0053] Step S60: The third filter element is successively covered with a mesh bag and equipped with an end cap to form a filter element made of the carbon fiber filter composite material.

[0054] It can be seen from the above production process that this embodiment adopts the key core technical method of configuring adsorption solution → making filter element mesh cylinder → extracting liquid into layers → squeezing water → drying water, forming a new technical feature. It is different from the prior art of first making activated carbon or carbon fiber composite materials into filter cloth or filter cotton through papermaking or other methods, and then arranging it on the filter mesh cylinder or in the outer shell. Not only the processing technology of the filter element itself is greatly shortened, the simplicity is greatly improved, and the application advantages are enhanced.

[0055] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for making a filter element of a carbon fiber filter composite material, characterized in that: The filter element manufacturing method comprises the following steps: S10: Preparing carbon fiber filtration composite material solution: The polyacrylonitrile-based carbon fiber, the low-melting point adhesive fiber, the polyvinyl alcohol fiber and the polyacrylamide are mixed and stirred to form a carbon fiber filtration composite material, and deionized water is added and stirred to prepare the carbon fiber filtration composite material solution; S20: Preparation of filter element mesh cylinder: Take a cylindrical plastic mesh cylinder, wrap the first non-woven fabric on its surface to form a filter element mesh cylinder; S30: placing the carbon fiber filtration composite material solution in a cylinder, stirring it continuously and evenly, setting sealed liquid pumping devices at both ends of the filter element mesh cylinder, and immersing the filter element mesh cylinder as a whole in the carbon fiber filtration composite material solution, using the sealed liquid pumping device to pump liquid, and absorbing the carbon fiber filtration composite material onto the surface of the first non-woven fabric to form a first filter element as a whole; S40: extruding the surface of the first filter element and squeezing out the deionized water in the carbon fiber filtration composite material to form a second filter element; S50: drying the second filter element, and then wrapping a second non-woven fabric on the outer surface to form a third filter element; S60: sequentially performing mesh bag covering and end cap dispensing processing on the third filter element to form a filter element of the carbon fiber filtration composite material.

2. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The method of preparing the carbon fiber filtration composite material solution also includes: Activated carbon powder, diatomaceous earth and coniferous wood pulp fiber are added to the carbon fiber filtration composite material, mixed and stirred, and deionized water is added and stirred to prepare the carbon fiber filtration composite material solution.

3. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1 or 2, characterized in that: The volume concentration of the carbon fiber filtration composite material solution is 5% to 20%.

4. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The material of the cylindrical plastic mesh tube is one of PP, PVC, PET and PTFE; The mesh density of the cylindrical plastic mesh tube is 0.5 mesh to 20 mesh; Rockwell hardness: 48 to 120; High temperature resistance: 80℃ to 150℃.

5. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The liquid pumping device includes a support column, a clamping end, a support arm, a pressing mechanism, a lifting mechanism, a liquid pumping pipeline, and a liquid pump. The clamping end seal is clamped at both ends of the filter element mesh cylinder, and the installation form of the filter element mesh cylinder is parallel to the liquid surface of the carbon fiber filtration composite material solution; The engaging end is mounted on one end of the support arm, the other end of the support arm is mounted on the pressing mechanism, the pressing mechanism is mounted on the lifting mechanism, and the lifting mechanism is mounted on the support column; One end of the liquid extraction pipeline is connected to the clamping end, and the other end is connected to the liquid extraction pump; The liquid discharge port of the liquid pump is connected to the cylinder body; The process of forming the first filter element through S30 is as follows: Install the two ends of the filter element mesh cylinder onto the clamping ends, The clamping end is pressed against the two ends of the filter element mesh cylinder by the pressing mechanism. The filter element net cylinder is immersed in its entirety into the carbon fiber filtration composite material solution through the lifting mechanism. The liquid pump is turned on to pump the carbon fiber filtration composite material solution onto the filter element mesh cylinder through the liquid pumping pipeline, so that the carbon fiber filtration composite material is absorbed and implanted onto the surface of the first non-woven fabric. After the suction is completed, the liquid pump is turned off. The filter element net cylinder is lifted out by the lifting mechanism. Release the pressing mechanism, and then release the supporting arm and the engaging end, and remove the first filter element.

6. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1 or 5, characterized in that: The negative pressure of the liquid extraction is 2.0 kPa to 20.0 kPa; After the liquid extraction process is completed, the thickness of the carbon fiber filtration composite material attached to the surface of the first filter element is 5 mm to 30 mm, and the density is 0.07 g / cm 3 and 0.80g / cm 3 .

7. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The material of the first non-woven fabric or the second non-woven fabric is one of polyester non-woven fabric, polypropylene non-woven fabric, nylon non-woven fabric and vinylon.

8. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1 or 7, characterized in that: The first nonwoven fabric or the second nonwoven fabric has a thickness of 0.5 mm to 3.0 mm and a density of 5.0 g / ㎡ to 50.0 g / ㎡.

9. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The extrusion of the first filter element surface is performed by using double rollers or triple rollers.

10. The method for manufacturing a filter element of a carbon fiber filter composite material according to claim 1, characterized in that: The drying is performed at a temperature of 100° C. to 150° C. and for a time of 120 minutes to 240 minutes.

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