CN113181888B - Water-ring type adsorption molding polyacrylonitrile slurry mixing activated carbon manufacturing filter element and method - Google Patents
Water-ring type adsorption molding polyacrylonitrile slurry mixing activated carbon manufacturing filter element and method Download PDFInfo
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- CN113181888B CN113181888B CN202110454014.0A CN202110454014A CN113181888B CN 113181888 B CN113181888 B CN 113181888B CN 202110454014 A CN202110454014 A CN 202110454014A CN 113181888 B CN113181888 B CN 113181888B
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Abstract
The invention discloses a filter element and a method for manufacturing water-ring type adsorption molding polyacrylonitrile slurry mixing activated carbon, which relate to the technical field of filter element manufacturing and comprise a structural pipe and a filter material layer, wherein the filter material layer is fixedly sleeved with the side wall of the structural pipe.
Description
Technical Field
The invention relates to the technical field of filter element manufacturing, in particular to a filter element manufactured by mixing polyacrylonitrile slurry and activated carbon through water ring type adsorption molding and a method thereof.
Background
The active carbon filter core is made up by using high-quality shell carbon and coal active carbon as raw material, using edible adhesive as auxiliary material and adopting high-tech technology through a special process, and integrating the actions of adsorption, filtration, interception and catalysis into one body, and can effectively remove organic matter, residual chlorine and other radioactive substances in water, and possesses the functions of decoloring and removing peculiar smell.
Through retrieval, chinese patent No. CN202011109975X discloses a preparation method of an active carbon filter element, which can achieve a certain effect, but still adopts a traditional process, has low adsorption effect and poor hydrophilicity compatibility, is easy to generate black water and fracture in the use process, has no optimization in the manufacturing process, reduces the manufacturing efficiency, prolongs the production time, and brings about the problem of high production cost.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a filter element and a method for manufacturing activated carbon by mixing polyacrylonitrile slurry prepared by water-ring adsorption molding.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the filter core is manufactured by mixing polyacrylonitrile slurry formed by water ring type adsorption and active carbon, and comprises a structural pipe and a filter material layer, wherein the filter material layer is fixedly sleeved with the side wall of the structural pipe.
The method for preparing the filter element by using the polyacrylonitrile slurry and the activated carbon through water ring type adsorption molding comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing the polyacrylonitrile pulp fibers according to the following mass percentages: 1-2 parts of polyacrylonitrile fiber, 0.2-0.6 part of calcium carbonate powder, 0.2-0.4 part of protein micro-nano powder, 0.5-1 part of sodium hydroxide solution and 0.5-1 part of HCl solution;
s2, chopping 1-2 parts of polyacrylonitrile fiber, and then carrying out step-by-step grinding, wherein the method specifically comprises the following steps:
a. carrying out first grinding and decomposition on polyacrylonitrile fibers by using a grinding disc;
b. after the first grinding, adding 0.2-0.6 part of calcium carbonate powder into the grinding disc for the second grinding;
c. after the second grinding is finished, adding 0.2-0.4 part of protein micro-nano powder into the grinding disc for the third grinding;
s3, adding 0.5-1 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.2-0.4 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5-1 part of HCl solution, so that 0.2-0.6 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5-9 parts of polyacrylonitrile pulp fibers in 1500-1700 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90-95 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: then, inputting the mixed aqueous solution into a forming hopper, sleeving a structure pipe on a negative pressure adsorption pipe, immersing the negative pressure adsorption pipe with the structure pipe into the forming hopper, and carrying out negative pressure adsorption to ensure that microfibers, microparticles and powder in the mixed aqueous solution are adsorbed outside the structure pipe to form hundreds of layers of filter material layers;
step five: taking the negative pressure adsorption tube with the structure tube out of the forming hopper, and pumping water and rolling the filtering material layer outside the structure tube by utilizing a pressurizing roller device, so that the structure tube and the filtering material layer form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
Further, the filtering material layer comprises the following components in parts by weight: 90-95 parts of composite active carbon, 5-9 parts of polyacrylonitrile pulp fiber dry, 1500-1700 parts of pure water, 1-2 parts of polyacrylonitrile fiber dry, 0.2-0.6 part of calcium carbonate powder, 0.2-0.4 part of protein micro-nano powder, 0.5-1 part of sodium hydroxide solution and 0.5-1 part of HCl solution.
Further, the concentration of the mixed aqueous solution prepared in the third step is controlled to be 6-8%.
Further, in the step six, a heating rod is adopted for drying, and the temperature is 110-130 DEG C
The drying time is 6-10h, and the water content of the filter element after drying is 3-5%.
Further, in step S2, the grinding disc includes a slurry tank, a motor is installed on a side wall of the slurry tank, a rotating shaft is fixedly connected to an output end of the motor, the other end of the rotating shaft extends into the slurry tank, a fly cutter roller is fixedly sleeved on an extending end of the rotating shaft, a bottom cutter plate is connected to a side wall of the fly cutter roller in a contact manner, and a bottom surface of the bottom cutter plate is fixedly connected with an inner bottom surface of the slurry tank.
Further, the top surface of bed knife board slope sets up, the feed inlet has been seted up on the top surface of thick liquid pond.
Further, the motor drives the fly cutter roller to move through the rotating shaft.
Compared with the prior art, the invention has the beneficial effects that:
1. the polyacrylonitrile fibers can be ground by adopting the protein micro-nano powder and the calcium carbonate powder, so that the polyacrylonitrile fibers are separated, the generation of static electricity among the polyacrylonitrile fibers is reduced, the probability of the polyacrylonitrile fibers agglomerating in a millstone machine is also reduced, the efficiency of forming slurry by the polyacrylonitrile fibers is improved, the preparation speed of the filter element is further improved, the production time is shortened, and a large amount of production cost is saved.
2. The activated carbon prepared by mixing the polyacrylonitrile paste has higher adsorption efficiency, can adapt to the application of different environments, improves the application range, solves the technical problem that the existing fibrous, granular and powdery functional filter materials and high-molecular fibrous functional materials cannot be mixed and compatible for molding, and has the following advantages:
a. the water-ring formed composite active carbon filter element has good hydrophilic compatibility, small pressure drop, large water yield without black water, and difficult occurrence of fracture and blockage phenomena in the use process.
b. The inside active carbon fiber filter fineness of the compound active carbon filter core of water ring type shaping is high, even the circumstances that carbon powder and play black water can not appear in the initial water that leads to yet, as the preliminary treatment, can replace the cotton filter core of PP, filling active carbon granule and extrusion, compression active carbon stick, saved the structural design volume and the manufacturing cost of water purifier greatly.
c. The water ring type formed composite active carbon filter element has a more stable and elastic structure, avoids the breakage phenomenon of the active carbon layer of the filter element during transportation, and ensures the water purifying effect of the filter element.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a front cross-sectional view of a millstone in a method for manufacturing a filter element by mixing water-ring type adsorption molding polyacrylonitrile slurry and activated carbon;
FIG. 2 is a left side view of a millstone in a method for manufacturing a filter element by using water-ring type adsorption molding polyacrylonitrile slurry-poised active carbon;
FIG. 3 is a top view of a millstone structure in a method for manufacturing a filter element by using water-ring type adsorption molding polyacrylonitrile slurry-poised active carbon;
fig. 4 is a schematic diagram of the overall structure of the filter element manufactured by mixing the water-ring type adsorption molding polyacrylonitrile slurry and the activated carbon.
In the figure: 1. grinding disc; 11. a slurry tank; 12. a motor; 13. a rotating shaft; 14. fly cutter roller; 15. a bed knife plate; 2. a structural tube; 3. a layer of filter material.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1-4, the filter element manufactured by mixing and mixing polyacrylonitrile slurry with activated carbon through water ring type adsorption molding comprises a structural pipe 2 and a filtering material layer 3, wherein the filtering material layer 3 is fixedly sleeved with the side wall of the structural pipe 2.
The method for preparing the filter element by using the polyacrylonitrile slurry and the activated carbon through water ring type adsorption molding comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing polyacrylonitrile pulp fibers according to the following mass percentages: 1-2 parts of polyacrylonitrile fiber, 0.2-0.6 part of calcium carbonate powder, 0.2-0.4 part of protein micro-nano powder, 0.5-1 part of sodium hydroxide solution and 0.5-1 part of HCl solution;
s2, chopping 1-2 parts of polyacrylonitrile fiber, and then carrying out step-by-step grinding, wherein the method specifically comprises the following steps:
a. the polyacrylonitrile fiber is ground for the first time by using a grinding disc 1;
b. after the first grinding, adding 0.2-0.6 part of calcium carbonate powder into the grinding disc 1 for the second grinding;
c. after the second grinding is finished, adding 0.2-0.4 part of protein micro-nano powder into the grinding disc 1 for the third grinding;
s3, adding 0.5-1 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.2-0.4 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5-1 part of HCl solution, so that 0.2-0.6 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5-9 parts of polyacrylonitrile pulp fibers in 1500-1700 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90-95 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: then the mixed aqueous solution is input into a forming hopper, the structural pipe 2 is sleeved on the negative pressure adsorption pipe, and the negative pressure adsorption pipe with the structural pipe 2 is immersed into the forming hopper and is subjected to negative pressure adsorption, so that microfibers, microparticles and powder in the mixed aqueous solution are adsorbed outside the structural pipe 2 to form hundreds of layers of filter material layers 3;
step five: taking the negative pressure adsorption tube with the structural tube 2 out of the forming hopper, and pumping and rolling the filtering material layer 3 outside the structural tube 2 by utilizing a pressurizing roller device, so that the structural tube 2 and the filtering material layer 3 form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
The concentration of the mixed aqueous solution prepared in the third step is controlled to be 6-8%.
And step six, drying the filter element by adopting a heating rod at the temperature of 110-130 ℃ for 6-10 hours, wherein the water content of the filter element after drying is 3-5%.
The filtering material layer 3 comprises the following components in parts by weight: 90-95 parts of composite active carbon, 5-9 parts of polyacrylonitrile pulp fiber dry, 1500-1700 parts of pure water, 1-2 parts of polyacrylonitrile fiber dry, 0.2-0.6 part of calcium carbonate powder, 0.2-0.4 part of protein micro-nano powder, 0.5-1 part of sodium hydroxide solution and 0.5-1 part of HCl solution.
In the step S2, the millstone 1 comprises a slurry tank 11, a motor 12 is arranged on the side wall of the slurry tank 11, a rotating shaft 13 is fixedly connected to the output end of the motor 12, the other end of the rotating shaft 13 extends into the slurry tank 11, a fly cutter roller 14 is fixedly sleeved on the extending end of the rotating shaft 13, a bottom cutter plate 15 is connected to the side wall of the fly cutter roller 14 in a contact manner, and the bottom surface of the bottom cutter plate 15 is fixedly connected with the inner bottom surface of the slurry tank 11.
The top surface of the bottom knife plate 15 is obliquely arranged, a feed inlet is formed in the top surface of the slurry tank 11, and the motor 12 drives the fly cutter roller 14 to move through the rotating shaft 13.
Example 1:
the method for preparing the filter element by using the polyacrylonitrile slurry and the activated carbon through water ring type adsorption molding comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing polyacrylonitrile pulp fibers according to the following mass percentages: 1 part of polyacrylonitrile fiber, 0.2 part of calcium carbonate powder, 0.2 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution;
s2, after 1 part of polyacrylonitrile fiber is chopped, step-by-step grinding is carried out, and the method specifically comprises the following steps:
a. the polyacrylonitrile fiber is ground for the first time by using a grinding disc 1;
b. after the first grinding, 0.2 part of calcium carbonate powder is added into the grinding disc 1 for the second grinding;
c. after the second grinding is finished, adding 0.2 part of protein micro-nano powder into the grinding disc 1 for the third grinding;
s3, adding 0.5 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.2 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5 part of HCl solution, so that 0.2 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5 parts of polyacrylonitrile pulp fibers in 1500 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: then the mixed aqueous solution is input into a forming hopper, the structural pipe 2 is sleeved on the negative pressure adsorption pipe, and the negative pressure adsorption pipe with the structural pipe 2 is immersed into the forming hopper and is subjected to negative pressure adsorption, so that microfibers, microparticles and powder in the mixed aqueous solution are adsorbed outside the structural pipe 2 to form hundreds of layers of filter material layers 3;
step five: taking the negative pressure adsorption tube with the structural tube 2 out of the forming hopper, and pumping and rolling the filtering material layer 3 outside the structural tube 2 by utilizing a pressurizing roller device, so that the structural tube 2 and the filtering material layer 3 form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
The concentration of the mixed aqueous solution prepared in the third step is controlled to be 6%.
And step six, drying the filter element by adopting a heating rod at the temperature of 110 ℃ for 6 hours, wherein the water content of the filter element after drying is 3%.
Wherein, the filter material layer 3 comprises the following components in parts by weight: 90 parts of composite activated carbon, 5 parts of polyacrylonitrile pulp fiber dry, 1500 parts of pure water, 1 part of polyacrylonitrile fiber dry, 0.2 part of calcium carbonate powder, 0.2 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution.
Example 2:
the method for preparing the filter element by using the polyacrylonitrile slurry and the activated carbon through water ring type adsorption molding comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing polyacrylonitrile pulp fibers according to the following mass percentages: 1 part of polyacrylonitrile fiber, 0.4 part of calcium carbonate powder, 0.3 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution;
s2, after 1 part of polyacrylonitrile fiber is chopped, step-by-step grinding is carried out, and the method specifically comprises the following steps:
a. the polyacrylonitrile fiber is ground for the first time by using a grinding disc 1;
b. after the first grinding, 0.4 part of calcium carbonate powder is added into the grinding disc 1 for the second grinding;
c. after the second grinding is finished, adding 0.3 part of protein micro-nano powder into the grinding disc 1 for the third grinding;
s3, adding 0.5 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.3 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5 part of HCl solution, so that 0.4 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5 parts of polyacrylonitrile pulp fibers in 1500 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: then the mixed aqueous solution is input into a forming hopper, the structural pipe 2 is sleeved on the negative pressure adsorption pipe, and the negative pressure adsorption pipe with the structural pipe 2 is immersed into the forming hopper and is subjected to negative pressure adsorption, so that microfibers, microparticles and powder in the mixed aqueous solution are adsorbed outside the structural pipe 2 to form hundreds of layers of filter material layers 3;
step five: taking the negative pressure adsorption tube with the structural tube 2 out of the forming hopper, and pumping and rolling the filtering material layer 3 outside the structural tube 2 by utilizing a pressurizing roller device, so that the structural tube 2 and the filtering material layer 3 form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
The concentration of the mixed aqueous solution prepared in the third step is controlled to be 6%.
And step six, drying the filter element by adopting a heating rod at the temperature of 110 ℃ for 6 hours, wherein the water content of the filter element after drying is 3%.
Wherein, the filter material layer 3 comprises the following components in parts by weight: 90 parts of composite activated carbon, 5 parts of polyacrylonitrile pulp fiber dry, 1500 parts of pure water, 1 part of polyacrylonitrile fiber dry, 0.4 part of calcium carbonate powder, 0.3 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution.
Example 3:
the method for preparing the filter element by using the polyacrylonitrile slurry and the activated carbon through water ring type adsorption molding comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing polyacrylonitrile pulp fibers according to the following mass percentages: 1 part of polyacrylonitrile fiber, 0.6 part of calcium carbonate powder, 0.4 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution;
s2, after 1 part of polyacrylonitrile fiber is chopped, step-by-step grinding is carried out, and the method specifically comprises the following steps:
a. the polyacrylonitrile fiber is ground for the first time by using a grinding disc 1;
b. after the first grinding, 0.6 part of calcium carbonate powder is added into the grinding disc 1 for the second grinding;
c. after the second grinding is finished, adding 0.4 part of protein micro-nano powder into the grinding disc 1 for the third grinding;
s3, adding 0.5 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.4 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5 part of HCl solution, so that 0.6 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5 parts of polyacrylonitrile pulp fibers in 1500 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: then the mixed aqueous solution is input into a forming hopper, the structural pipe 2 is sleeved on the negative pressure adsorption pipe, and the negative pressure adsorption pipe with the structural pipe 2 is immersed into the forming hopper and is subjected to negative pressure adsorption, so that microfibers, microparticles and powder in the mixed aqueous solution are adsorbed outside the structural pipe 2 to form hundreds of layers of filter material layers 3;
step five: taking the negative pressure adsorption tube with the structural tube 2 out of the forming hopper, and pumping and rolling the filtering material layer 3 outside the structural tube 2 by utilizing a pressurizing roller device, so that the structural tube 2 and the filtering material layer 3 form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
The concentration of the mixed aqueous solution prepared in the third step is controlled to be 6%.
And step six, drying the filter element by adopting a heating rod at the temperature of 110 ℃ for 6 hours, wherein the water content of the filter element after drying is 3%.
Wherein, the filter material layer 3 comprises the following components in parts by weight: 90 parts of composite activated carbon, 5 parts of polyacrylonitrile pulp fiber dry, 1500 parts of pure water, 1 part of polyacrylonitrile fiber dry, 0.6 part of calcium carbonate powder, 0.4 part of protein micro-nano powder, 0.5 part of sodium hydroxide solution and 0.5 part of HCl solution.
Comparative example 1:
the method for preparing the filter element by mixing the polyacrylonitrile slurry formed by water ring adsorption and the activated carbon comprises the following steps of: 95 parts of composite activated carbon, 9 parts of polyacrylonitrile pulp fiber dry, 1700 parts of pure water and 2 parts of polyacrylonitrile fiber dry, and other technical schemes are the same as in example 1.
By comparing example 1, example 2, example 3 with comparative example 1, it can be seen that: the speed of preparing the filter element in the embodiments 1, 2 and 3 is far higher than that of the comparative example 1, and the polyacrylonitrile fiber is respectively ground by the protein micro-nano powder coated with the polyacrylonitrile fiber and the calcium carbonate powder in the grinding disc grinding process, so that the polyacrylonitrile fiber is separated, the generation of static electricity among the polyacrylonitrile fiber is reduced, the probability of agglomerating the polyacrylonitrile fiber in a grinding disc machine is also reduced, the efficiency of forming slurry by the polyacrylonitrile fiber is improved, the preparation speed of the filter element is further improved, the production time is reduced, and a large amount of production cost is saved;
working principle of millstone: the motor 12 on the pulp tank 11 is started, so that the motor 12 drives the fly cutter roller 14 to rotate through the rotating shaft 13, the fly cutter roller 14 is matched with the bottom cutter plate 15 to grind the depolymerized acrylonitrile fibers, the purpose of improving grinding efficiency is achieved, and the polyacrylonitrile fibers can be quickly converted into polyacrylonitrile pulp fibers, so that the operation is completed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The filter element is characterized by comprising a structural pipe (2) and a filter material layer (3), wherein the filter material layer (3) is fixedly sleeved with the side wall of the structural pipe (2);
the method for preparing the filter element by mixing the polyacrylonitrile slurry and the activated carbon comprises the following specific steps:
step one: the preparation method of the polyacrylonitrile pulp fiber comprises the following steps:
s1, preparing the polyacrylonitrile pulp fibers according to the following parts by weight: 1-2 parts of polyacrylonitrile fiber, 0.2-0.6 part of calcium carbonate powder, 0.2-0.4 part of protein micro-nano powder, 0.5-1 part of sodium hydroxide solution and 0.5-1 part of HCl solution;
s2, chopping 1-2 parts of polyacrylonitrile fiber, and then carrying out step-by-step grinding, wherein the method specifically comprises the following steps:
a. the polyacrylonitrile fiber is ground for the first time by using a grinding disc (1);
b. after the first grinding, 0.2-0.6 part of calcium carbonate powder is added into the grinding disc (1) for the second grinding;
c. after the second grinding is finished, adding 0.2-0.4 part of protein micro-nano powder into the grinding disc (1) for the third grinding;
s3, adding 0.5-1 part of sodium hydroxide solution into the mixture after the third grinding, so that 0.2-0.4 part of protein micro-nano powder in the mixture is separated out, and then adding 0.5-1 part of HCl solution, so that 0.2-0.6 part of calcium carbonate powder in the mixture is separated out;
s4, separating and filtering to obtain the polyacrylonitrile pulp fibers;
step two: fully beating 5-9 parts of polyacrylonitrile pulp fibers in 1500-1700 parts of pure water, and uniformly stirring to form mixed slurry;
step three: the mixed slurry is sent into a storage vat with a stirring function, 90-95 parts of composite active carbon is put into the storage vat, and the mixture is fully stirred and mixed to prepare a mixed aqueous solution;
step four: inputting the mixed aqueous solution into a forming hopper, sleeving a structural pipe (2) on a negative pressure adsorption pipe, immersing the negative pressure adsorption pipe with the structural pipe (2) into the forming hopper, and carrying out negative pressure adsorption to enable microfibers, microparticles and powder in the mixed aqueous solution to be adsorbed outside the structural pipe (2) so as to form hundreds of layers of filter material layers (3);
step five: taking the negative pressure adsorption tube with the structure tube (2) out of the forming hopper, and pumping and rolling the filtering material layer (3) outside the structure tube (2) by utilizing a pressurizing roller device, so that the structure tube (2) and the filtering material layer (3) form a prefabricated filter element;
step six: and taking down the prefabricated filter element from the negative pressure adsorption pipe, putting the prefabricated filter element on a specially-made upper, lower, left and right circulating ventilation plate, and drying to obtain the filter element.
2. The filter element made of the water-ring type adsorption molding polyacrylonitrile slurry-mixed activated carbon according to claim 1, wherein the concentration of the mixed aqueous solution prepared in the third step is controlled to be 6-8%.
3. The filter element made of the water-ring type adsorption molding polyacrylonitrile slurry-mixed activated carbon according to claim 1, wherein a heating rod is adopted for drying in the step six, the temperature is 110-130 ℃, the drying time is 6-10h, and the water content of the filter element after drying is 3-5%.
4. The filter element manufactured by mixing activated carbon with polyacrylonitrile pulp and using water ring type adsorption molding according to claim 1, wherein in the step S2, the grinding disc (1) comprises a pulp tank (11), a motor (12) is installed on the side wall of the pulp tank (11), a rotating shaft (13) is fixedly connected to the output end of the motor (12), the other end of the rotating shaft (13) extends into the pulp tank (11), a fly cutter roller (14) is fixedly sleeved on the extending end of the rotating shaft (13), a bottom cutter plate (15) is connected to the side wall of the fly cutter roller (14) in a contact manner, and the bottom surface of the bottom cutter plate (15) is fixedly connected with the inner bottom surface of the pulp tank (11).
5. The filter element made of the water-ring type adsorption molding polyacrylonitrile slurry-poised active carbon according to claim 4, wherein the top surface of the bottom knife plate (15) is obliquely arranged, and a feed inlet is formed in the top surface of the slurry tank (11).
6. The filter element made of the water-ring type adsorption molding polyacrylonitrile slurry-mixed activated carbon according to claim 4, wherein the motor (12) drives the fly cutter roller (14) to move through the rotating shaft (13).
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