CN113599884A - Filter core that stability is good - Google Patents

Filter core that stability is good Download PDF

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Publication number
CN113599884A
CN113599884A CN202110993884.5A CN202110993884A CN113599884A CN 113599884 A CN113599884 A CN 113599884A CN 202110993884 A CN202110993884 A CN 202110993884A CN 113599884 A CN113599884 A CN 113599884A
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China
Prior art keywords
filter element
parts
positioning
filter
hole
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CN202110993884.5A
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Chinese (zh)
Inventor
石传捷
石传兴
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Dongguan Yujie Industry Investment Co ltd
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Dongguan Yujie Industry Investment Co ltd
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Priority to CN202110993884.5A priority Critical patent/CN113599884A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
    • B01D29/333—Self-supporting filtering elements arranged for inward flow filtration with corrugated, folded filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B01D35/306—Filter mounting adapter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0001—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • B01D2201/295—End caps with projections extending in a radial outward direction, e.g. for use as a guide, spacing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/304—Seals or gaskets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4069—Magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4076—Anti-rotational means

Abstract

The invention relates to the technical field of filter parts, in particular to a filter element with good stability, which comprises a shell and a filter element, wherein the filter element is formed by folding filter paper, a plurality of limiting teeth are distributed on the outer side wall of the shell, the filter element is installed on the shell, the limiting teeth are used for abutting against the inner side wall of the filter element, the filter element also comprises a plurality of connecting pieces, one limiting tooth is provided with a positioning surface, the positioning surface is provided with a plurality of first positioning holes, and two ends of the filter element are respectively provided with a plurality of second positioning holes; the two ends of the filtering piece are overlapped and then abutted against the positioning surface, so that the first positioning hole is communicated with the second positioning hole, and the connecting piece is fixed in the first positioning hole after passing through the second positioning hole. According to the invention, after the two ends of the filter element are overlapped on the positioning surface, the filter element passes through the second positioning hole through the connecting piece and then is fixed in the first positioning hole, so that the reliability of fixing the filter element is ensured, and the assembly efficiency is not influenced.

Description

Filter core that stability is good
Technical Field
The invention relates to the technical field of filter parts, in particular to a filter element with good stability.
Background
The filter element is a core component of a water purifier, a filter and other devices, is provided with a suction hole only allowing fluid to flow through, and is used for separating the fluid from impurities mixed in the fluid so as to achieve a purification effect. In the current filter element, the filter element is usually made by a spray melting process or by folding filter paper, and the filter element is sleeved outside the shell and two ends of the filter element are connected in a bonding or welding manner, so that the filter element wraps the shell. Obviously, the two above-mentioned approaches have the following disadvantages, respectively: although the filter element can be used after being wrapped by the shell in the bonding mode, the bonding position is easy to loosen and even fall off due to the fact that the filter element needs to be in contact with fluid; the welding method needs to be performed before the welding is performed, and then the welding method is assembled to the shell, so that the alignment is needed during the assembly, and the assembly efficiency is affected.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the filter element with good stability, which can ensure the reliable assembly of the filter element and cannot influence the efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme:
the filter element with good stability comprises a shell and a filter element, wherein the filter element is formed by folding filter paper, a plurality of limiting teeth are distributed on the outer side wall of the shell, the filter element is installed on the shell, the limiting teeth are used for abutting against the inner side wall of the filter element, the filter element further comprises a plurality of connecting pieces, one limiting tooth is provided with a positioning surface, the positioning surface is provided with a plurality of first positioning holes, and two ends of the filter element are respectively provided with a plurality of second positioning holes; the two ends of the filtering piece are overlapped and then abutted against the positioning surface, so that the first positioning hole is communicated with the second positioning hole, and the connecting piece is fixed in the first positioning hole after passing through the second positioning hole.
Further, the connecting piece includes conflict portion and connecting portion, connecting portion be used for passing behind the second locating hole with first locating hole spiro union, conflict portion be used for conflicting behind connecting portion and first locating hole spiro union filter, conflict portion is made by soft materials.
Further, the shell is provided with a circulation hole and a plurality of communication holes, the circulation hole penetrates through two ends of the shell, and the circulation hole is communicated with the communication holes; each communicating hole is positioned between two adjacent limiting teeth, and the filtering piece is used for filtering fluid and then inputting the fluid into the shell through the communicating holes.
Furthermore, the bottom of casing is provided with the base, the top of casing can be dismantled and be provided with the top cap, the top cap is provided with and is used for inserting location portion in the through-hole, location portion is provided with the through-hole, the lateral wall of location portion is provided with the sealing ring, the lateral wall of casing is provided with and is used for assembling the seal groove of sealing ring.
Preferably, a plurality of positioning magnet are installed in the bottom embedding of base, the base runs through and is provided with a plurality of locating holes, and positioning magnet is used for carrying out the magnetism with external part and inhales the location, and the locating hole is used for passing through the screw with external part after the location and is connected.
Further, the filter paper comprises the following raw materials in parts by weight: 45-55 parts of softwood pulp, 6-12 parts of bamboo charcoal fiber, 44-52 parts of modified activated carbon, 5-8 parts of polyester fiber, 2-4 parts of acrylic fiber, 4-7 parts of sodium carboxymethylcellulose, 0.6-1.5 parts of polyamide polyamine epichlorohydrin resin, 0.5-1 part of cationic polyacrylamide, 0.4-0.7 part of sizing agent and 6.5-12 parts of synergistic additive.
The filter paper provided by the invention takes the softwood pulp, the bamboo charcoal fiber, the polyester fiber, the acrylic fiber and the like as carriers in a matching manner, and the modified activated carbon powder, the sodium carboxymethylcellulose, the acrylic emulsion and other raw materials are compounded, so that the raw materials are good in compatibility and uniform in distribution, the filter material with a porous network structure and uniform in distribution of the raw materials is formed, the filter material has good trapping, adsorbing and filtering effects on organic impurities and residual chlorine in water, the filter paper is good in filtering performance and purifying effect, good in mechanical property and excellent in tensile index, can be curled or folded, and is applied to a filter element as the filter element, and the filter paper is strong in practicability.
Further, the molecular weight of the cationic polyacrylamide is 900-1200. According to the invention, the cationic polyacrylamide is added into the paper pulp, and the cationic polyacrylamide is adsorbed and combined with the activated carbon particles to form small floccules, so that more activated carbon is adsorbed in the filter paper carrier, and the improvement of the permeability of fluid through the filter paper fiber layer is facilitated.
Further, each part of the synergistic auxiliary comprises the following raw materials in parts by weight: 2.5-4.5 parts of pure acrylic emulsion, 3-6 parts of nano calcium carbonate and 1-1.5 parts of vinyl trimethoxy silane. According to the invention, the pure acrylic emulsion, the nano calcium carbonate and the vinyl trimethoxy silane are matched, the compatibility of the raw materials is good, the prepared synergistic additive can be uniformly distributed in paper pulp, the mechanical property of the filter paper is improved, and the filter paper has a good filtering effect. The pure acrylic emulsion is preferably, but not limited to, pure acrylic emulsion CARBOSET CR 726.
Further, the sizing agent is at least one of alkyl olefin succinic anhydride and alkyl ketene dimer. Preferably, the sizing agent is prepared from alkyl olefin succinic anhydride and alkyl ketene dimer according to the mass ratio of 1: 1.5-3. By adopting the sizing agent, the sizing agent has high sizing efficiency, has the advantages of no toxicity and difficult hydrolysis, is beneficial to improving the water resistance of paper, can effectively delay the passing speed of fluid in filter paper, enables organic pollutants and impurity molecules in the fluid to fully act with the effective components of the filter paper, and improves the purification effect of filtered water.
Further, the preparation method of the modified activated carbon comprises the following steps: s1, adding wood activated carbon particles into a sodium hydroxide solution, carrying out ultrasonic treatment at 50-60 ℃ for 20-30min, filtering, washing with deionized water, and drying to obtain a modified activated carbon primary product A; s2, preserving the temperature of the modified activated carbon primary product A for 30-50min at the temperature of 600-650 ℃ in a nitrogen atmosphere to obtain a modified activated carbon primary product B; s3, adding the modified activated carbon primary product B into a nitric acid solution, carrying out ultrasonic treatment at the temperature of 70-80 ℃ for 40-60min, filtering, washing with deionized water, and drying to obtain the modified activated carbon. The mass ratio of the wood activated carbon particles to the sodium hydroxide solution is 1:2-3, and the concentration of the sodium hydroxide solution is 20-30 wt%; the mass ratio of the modified activated carbon primary product B to the nitric acid solution is 1:3-5, and the concentration of the nitric acid solution is 20-30 wt%. Further, in the steps S1 and S2, the ultrasonic treatment frequency is 40-60 Hz. The modified activated carbon prepared by the method has large specific surface area and pore volume, has a mesoporous structure, improves the adsorption performance of the wood activated carbon, has the characteristics of high adsorption rate and capacity, high removal rate and the like when organic impurities and heavy metals in fluid are treated, and improves the water purification effect of filter paper.
Further, the preparation method of the filter paper comprises the following steps: (1) mixing polyester fiber, acrylic fiber and sodium carboxymethylcellulose in proportion, heating to 50-60 deg.C, and treating for 15-30min to obtain mixture A; (2) pulping softwood pulp, mixing with the mixture A and bamboo carbon fiber, defibering by 500-600r, then adding cationic polyacrylamide, polyamide polyamine epoxy chloropropane resin and a synergistic additive, defibering by 1500-2000r, adding a sizing agent for defibering by 600-700r, screening to obtain wet paper sheets, squeezing and drying the wet paper sheets to obtain the filter paper.
According to the invention, the filter paper is prepared by adopting the steps, and the polyester fiber, the acrylic fiber and the sodium carboxyethyl cellulose are mixed and then mixed with the softwood pulp and other raw materials, so that the prepared filter paper has good tensile strength, tearing strength and filtering performance, good residual chlorine removal capacity and CODCR removal capacity and long service life; the preparation method has the advantages of simple operation, convenient control, high production efficiency and stable product quality, and is beneficial to industrial production.
The invention has the beneficial effects that: according to the invention, after the two ends of the filter element are overlapped on the positioning surface, the filter element passes through the second positioning hole through the connecting piece and then is fixed in the first positioning hole, so that the reliability of fixing the filter element is ensured, and the assembly efficiency is not influenced.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic view of the filter element of the present invention after deployment.
Fig. 3 is a schematic view of a connector of the present invention.
Fig. 4 is a top view of the housing of the present invention with the top cover removed.
Fig. 5 is a schematic view of the top cover of the present invention.
Reference numerals: 1-casing, 2-filter piece, 3-connecting piece, 4-base, 5-top cap, 11-spacing tooth, 12-locating surface, 14-circulation hole, 15-intercommunicating pore, 21-second locating hole, 31-conflict portion, 32-connecting portion, 41-location magnet, 42-locating hole, 51-locating portion, 52-through hole, 53-sealing ring.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
Example 1
As shown in fig. 1 to 5, the filter element with good stability provided in this embodiment includes a housing 1 and a filter element 2, the filter element 2 is formed by folding filter paper, a plurality of limiting teeth 11 are distributed on an outer side wall of the housing 1, the filter element 2 is mounted to the housing 1, the limiting teeth 11 are used for abutting against an inner side wall of the filter element 2, and the filter element further includes a plurality of connecting members 3, one of the limiting teeth 11 is provided with a positioning surface 12, the positioning surface 12 is provided with a plurality of first positioning holes (not shown in the drawings), and two ends of the filter element 2 are respectively provided with a plurality of second positioning holes 21; the two ends of the filter piece 2 are overlapped and then abutted against the positioning surface 12, so that the first positioning hole is communicated with the second positioning hole 21, and the connecting piece 3 is fixed in the first positioning hole after passing through the second positioning hole 21.
During installation, the filter element 2 is surrounded on the outer side of the shell 1, the folding position of the filter element 2 is correspondingly abutted against each limiting tooth 11, the shape of the filter element 2 is ensured by jacking up the limiting teeth 11, and the filter element 2 is prevented from deforming under the impact of fluid to influence the filtering effect; after enclosing and finishing, filter the both ends of 2 and contradict with locating surface 12 after overlapping each other for first locating hole and second locating hole 21 intercommunication, then the staff can utilize connecting piece 3 to insert the mode in first locating hole behind second locating hole 21 and realize fixing, makes filter 2 can not scatter. Compared with the prior art, the filter element assembly device has a simple structure, ensures the assembly efficiency and avoids the filter element 2 from scattering and falling off due to fluid impact before replacement. In addition, when changing and filtering piece 2, only need to pull down behind connecting piece 3 can take off filtering piece 2 for it is more simple high-efficient to change.
In this embodiment, the connecting member 3 includes an abutting portion 31 and a connecting portion 32, the connecting portion 32 is configured to be screwed with the first positioning hole after passing through the second positioning hole 21, the abutting portion 31 is configured to abut against the filtering member 2 after the connecting portion 32 is screwed with the first positioning hole, and the abutting portion 31 is made of a soft material.
During the in-service use, this conflict portion 31 is made by silica gel, and connecting portion 32 then is metal or plastics or silica gel all can for connecting piece 3 is the structure of similar screw, is connected with first locating hole through the mode of spiro union, has guaranteed fixed effect, and easily dismouting.
In the present embodiment, the casing 1 is provided with a circulation hole 14 and a plurality of communication holes 15, the circulation hole 14 penetrates both ends of the casing 1, and the circulation hole 14 communicates with the plurality of communication holes 15; each communication hole 15 is located between two adjacent limiting teeth 11, and the filter element 2 is used for filtering fluid and inputting the fluid into the housing 1 through the communication hole 15. That is, the impurities of the fluid filtered by the filter element 2 are blocked by the filter element 2, so that the fluid enters the flow hole 14 through the communication hole 15 after being purified and is conveyed through the flow hole 14.
Specifically, the bottom of casing 1 is provided with base 4, the top of casing 1 can be dismantled and be provided with top cap 5, top cap 5 is provided with and is used for inserting location portion 51 in the opening 14, location portion 51 is provided with through-hole 52, location portion 51's lateral wall is provided with sealing ring 53, the lateral wall of casing 1 is provided with and is used for assembling sealing ring 53's seal groove. The base 4 is used for being installed at an external component, such as a water purifier or an air purifier; the top cover 5 plays a role in blocking, can be matched with the base 4 to limit the filter element 2, and can also be matched with an external component to play a role in blocking fluid, so that the fluid is prevented from leaking into the circulation hole 14 without passing through the filter element 2. The sealing ring 53 of the invention is matched with the sealing groove to form a mechanical sealing structure, so that the mounting stability of the top cover 5 can be ensured, the sealing effect is achieved, and fluid is prevented from leaking from the gap between the top cover 5 and the shell 1.
Preferably, a plurality of positioning magnets 41 are embedded in the bottom of the base 4, the base 4 is provided with a plurality of positioning holes 42 in a penetrating manner, the positioning magnets 41 are used for magnetically attracting and positioning with external components, and the positioning holes 42 are used for being connected with the external components through screws after positioning. After the positioning magnet 41 is used for positioning, a user can insert a screw into the positioning hole 42 and then fix the positioning magnet to an external component, so that the invention has the effect of easy assembly.
Example 2
In this embodiment, the filter paper comprises the following raw materials in parts by weight: 50 parts of softwood pulp, 9 parts of bamboo charcoal fiber, 49 parts of modified activated carbon, 6 parts of polyester fiber, 3 parts of acrylic fiber, 5 parts of sodium carboxyethyl cellulose, 1 part of polyamide polyamine epoxy chloropropane resin, 0.8 part of cationic polyacrylamide, 0.6 part of sizing agent and 8 parts of synergistic additive. The molecular weight of the cationic polyacrylamide is 900.
Further, each part of the synergistic auxiliary comprises the following raw materials in parts by weight: 3 parts of pure acrylic emulsion, 3.8 parts of nano calcium carbonate and 1.2 parts of vinyl trimethoxy silane. The pure acrylic emulsion is luobo-moisturizing pure acrylic emulsion CARBOSET CR 726. The sizing agent is prepared from alkyl alkenyl succinic anhydride and alkyl ketene dimer according to the mass ratio of 1:2.
Further, the preparation method of the modified activated carbon comprises the following steps: s1, adding wood activated carbon particles into a sodium hydroxide solution, carrying out ultrasonic treatment at 55 ℃ for 25min, filtering, washing with deionized water, and drying to obtain a modified activated carbon primary product A; s2, preserving the temperature of the modified activated carbon primary product A for 40min at 620 ℃ in a nitrogen atmosphere to obtain a modified activated carbon primary product B; s3, adding the modified activated carbon primary product B into a nitric acid solution, carrying out ultrasonic treatment for 50min at the temperature of 75 ℃, filtering, washing with deionized water, and drying to obtain the modified activated carbon. The mass ratio of the wood activated carbon particles to the sodium hydroxide solution is 1:2.5, and the concentration of the sodium hydroxide solution is 25 wt%; the mass ratio of the modified activated carbon primary product B to the nitric acid solution is 1:4, and the concentration of the nitric acid solution is 25 wt%. Further, in the steps S1 and S2, the frequency of the ultrasonic treatment is 50 Hz.
Further, the preparation method of the filter paper comprises the following steps: (1) mixing polyester fibers, acrylic fibers and sodium carboxymethylcellulose in proportion, and heating to 55 ℃ for treatment for 25min to obtain a mixture A; (2) pulping softwood pulp, mixing with the mixture A and bamboo carbon fiber, defibering by 600r, then adding cationic polyacrylamide, polyamide polyamine epoxy chloropropane resin and a synergistic additive, defibering by 1800r, adding a sizing agent, defibering by 600r, screening to obtain wet paper, squeezing and drying the wet paper to obtain the filter paper.
The rest of this embodiment is the same as embodiment 1, and will not be described herein again.
Example 3
In this embodiment, the filter paper comprises the following raw materials in parts by weight: 45 parts of softwood pulp, 6 parts of bamboo charcoal fiber, 44 parts of modified activated carbon, 5 parts of polyester fiber, 2 parts of acrylic fiber, 4 parts of sodium carboxyethyl cellulose, 0.6 part of polyamide polyamine epoxy chloropropane resin, 0.5 part of cationic polyacrylamide, 0.4 part of sizing agent and 6.5 parts of synergistic additive.
Further, each part of the synergistic auxiliary comprises the following raw materials in parts by weight: 2.5 parts of pure acrylic emulsion, 3 parts of nano calcium carbonate and 1 part of vinyl trimethoxy silane. The sizing agent is prepared from alkyl alkenyl succinic anhydride and alkyl ketene dimer according to the mass ratio of 1: 1.5.
Further, the preparation method of the modified activated carbon comprises the following steps: s1, adding wood activated carbon particles into a sodium hydroxide solution, carrying out ultrasonic treatment at 50 ℃ for 30min, filtering, washing with deionized water, and drying to obtain a modified activated carbon primary product A; s2, preserving the temperature of the modified activated carbon primary product A for 50min at 600 ℃ in a nitrogen atmosphere to obtain a modified activated carbon primary product B; and S3, adding the modified activated carbon primary product B into a nitric acid solution, carrying out ultrasonic treatment for 60min at the temperature of 70 ℃, filtering, washing with deionized water, and drying to obtain the modified activated carbon. The mass ratio of the wood activated carbon particles to the sodium hydroxide solution is 1:3, and the concentration of the sodium hydroxide solution is 20 wt%; the mass ratio of the modified activated carbon primary product B to the nitric acid solution is 1:5, and the concentration of the nitric acid solution is 20 wt%. Further, in the steps S1 and S2, the frequency of the ultrasonic treatment is 40 Hz.
Further, the preparation method of the filter paper comprises the following steps: (1) mixing polyester fibers, acrylic fibers and sodium carboxymethylcellulose in proportion, and heating to 50 ℃ for treatment for 30min to obtain a mixture A; (2) pulping softwood pulp, mixing with the mixture A and bamboo carbon fiber, defibering for 500r, then adding cationic polyacrylamide, polyamide polyamine epoxy chloropropane resin and a synergistic additive, defibering for 1500r, adding a sizing agent, defibering for 700r, screening to obtain wet paper, squeezing and drying the wet paper to obtain the filter paper.
Example 4
In this embodiment, the filter paper comprises the following raw materials in parts by weight: 55 parts of softwood pulp, 12 parts of bamboo charcoal fiber, 52 parts of modified activated carbon, 8 parts of polyester fiber, 4 parts of acrylic fiber, 7 parts of sodium carboxyethyl cellulose, 1.5 parts of polyamide polyamine epichlorohydrin resin, 1 part of cationic polyacrylamide, 0.7 part of sizing agent and 12 parts of synergistic additive. The molecular weight of the cationic polyacrylamide is 1200.
Further, each part of the synergistic auxiliary comprises the following raw materials in parts by weight: 4.5 parts of pure acrylic emulsion, 6 parts of nano calcium carbonate and 1.5 parts of vinyl trimethoxy silane. The sizing agent is prepared from alkyl alkenyl succinic anhydride and alkyl ketene dimer according to the mass ratio of 1:3, and (3).
Further, the preparation method of the modified activated carbon comprises the following steps: s1, adding wood activated carbon particles into a sodium hydroxide solution, carrying out ultrasonic treatment at the temperature of 60 ℃ for 20min, filtering, washing with deionized water, and drying to obtain a modified activated carbon primary product A; s2, preserving the temperature of the modified activated carbon primary product A for 30min at the temperature of 650 ℃ below zero in a nitrogen atmosphere to obtain a modified activated carbon primary product B; and S3, adding the modified activated carbon primary product B into a nitric acid solution, carrying out ultrasonic treatment for 40min at the temperature of 80 ℃, filtering, washing with deionized water, and drying to obtain the modified activated carbon. The mass ratio of the wood activated carbon particles to the sodium hydroxide solution is 1:2, and the concentration of the sodium hydroxide solution is 30 wt%; the mass ratio of the modified activated carbon primary product B to the nitric acid solution is 1:3, and the concentration of the nitric acid solution is 30 wt%. Further, in the steps S1 and S2, the frequency of the ultrasonic treatment is 60 Hz.
Further, the preparation method of the filter paper comprises the following steps: (1) mixing polyester fibers, acrylic fibers and sodium carboxymethylcellulose in proportion, and heating to 60 ℃ for treatment for 25min to obtain a mixture A; (2) pulping softwood pulp, mixing with the mixture A and bamboo carbon fiber, defibering for 500r, then adding cationic polyacrylamide, polyamide polyamine epichlorohydrin resin and a synergistic additive, defibering for 2000r, adding a sizing agent, defibering for 700r, screening to obtain wet paper, squeezing and drying the wet paper to obtain the filter paper.
Comparative example 1
This comparative example differs from example 2 in that: in the comparative example, the modified activated carbon in example 2 was replaced with the wood activated carbon, i.e., the wood activated carbon in the comparative example was not modified; this comparative example does not contain the builder of example 2.
The remainder of this comparative example is the same as example 2 and will not be described again here.
Filter papers were prepared using examples 2 to 4 and comparative example 1 so that the prepared filter papers had a thickness of 2. + -. 0.2mm and a grammage of 240±4g/m2The same water sample is taken for purification treatment, and performance tests such as residual chlorine after filtration, chemical oxygen demand after filtration, tensile index, wet tensile index and the like are carried out, and the test results are as follows:
Figure BDA0003233203480000121
wherein the residual chlorine amount after filtration before filtration of the water sample is 0.8mg/L, and the chemical oxygen demand (CODcr value) after filtration is 19.6 mg/L. And calculating the removal efficiency of the activated carbon filter paper on microorganisms and organic impurities in the tap water according to the difference between the two before and after filtration. The tensile index was determined according to GB 12914-2008; the wet tensile index was determined according to GB 465.2-2008.
The filter paper has the effect of removing organic impurities and residual chlorine in water, and has good mechanical property and excellent tensile index.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides a filter core that stability is good, includes the casing and filters the piece, filter the folding formation of filter paper, the lateral wall distribution of casing has a plurality of spacing teeth, filter the piece installation extremely the casing, a plurality of spacing teeth be used for with filter the inside wall conflict of piece, its characterized in that: the filter element is characterized by also comprising a plurality of connecting pieces, wherein one limiting tooth is provided with a positioning surface, the positioning surface is provided with a plurality of first positioning holes, and two ends of the filter element are respectively provided with a plurality of second positioning holes; the two ends of the filtering piece are overlapped and then abutted against the positioning surface, so that the first positioning hole is communicated with the second positioning hole, and the connecting piece is fixed in the first positioning hole after passing through the second positioning hole.
2. A filter element having good stability according to claim 1, wherein: the connecting piece includes conflict portion and connecting portion, connecting portion be used for passing behind the second locating hole with first locating hole spiro union, conflict portion be used for conflicting behind connecting portion and first locating hole spiro union filter, conflict portion is made by soft materials.
3. A filter element having good stability according to claim 1, wherein: the shell is provided with a circulation hole and a plurality of communication holes, the circulation hole penetrates through two ends of the shell, and the circulation hole is communicated with the communication holes; each communicating hole is positioned between two adjacent limiting teeth, and the filtering piece is used for filtering fluid and then inputting the fluid into the shell through the communicating holes.
4. A filter element according to claim 3 having good stability, wherein: the bottom of casing is provided with the base, the top of casing can be dismantled and be provided with the top cap, the top cap is provided with and is used for inserting location portion in the through-hole, location portion is provided with the through-hole, the lateral wall of location portion is provided with the sealing ring, the lateral wall of casing is provided with and is used for assembling the seal groove of sealing ring.
5. A filter element having good stability according to claim 4, wherein: a plurality of positioning magnets are installed in the bottom of the base in an embedded mode, a plurality of positioning holes are formed in the base in a penetrating mode and used for being magnetically attracted with external parts to be positioned, and the positioning holes are used for being connected with the external parts through screws after positioning.
6. A filter element having good stability according to claim 1, wherein: the filter paper comprises the following raw materials in parts by weight: 45-55 parts of softwood pulp, 6-12 parts of bamboo charcoal fiber, 44-52 parts of modified activated carbon, 5-8 parts of polyester fiber, 2-4 parts of acrylic fiber, 4-7 parts of sodium carboxymethylcellulose, 0.6-1.5 parts of polyamide polyamine epichlorohydrin resin, 0.5-1 part of cationic polyacrylamide, 0.4-0.7 part of sizing agent and 6.5-12 parts of synergistic additive.
7. A filter element having good stability according to claim 6, wherein: the molecular weight of the cationic polyacrylamide is 900-1200.
8. A filter element having good stability according to claim 6, wherein: each part of the synergistic auxiliary comprises the following raw materials in parts by weight: 2.5-4.5 parts of pure acrylic emulsion, 3-6 parts of nano calcium carbonate and 1-1.5 parts of vinyl trimethoxy silane.
9. A filter element having good stability according to claim 6, wherein: the sizing agent is at least one of alkyl alkene succinic anhydride and alkyl ketene dimer.
10. A filter element having good stability according to claim 6, wherein: the preparation method of the filter paper comprises the following steps: (1) mixing polyester fibers, acrylic fibers and sodium carboxymethylcellulose in proportion, and heating to obtain a mixture A; (2) pulping softwood pulp, mixing with the mixture A and bamboo carbon fiber, then defibering, adding cationic polyacrylamide, polyamide polyamine epoxy chloropropane resin and a synergistic additive for defibering, adding a sizing agent for defibering, screening to make wet paper sheets, squeezing the wet paper sheets, and drying to obtain the filter paper.
CN202110993884.5A 2021-08-27 2021-08-27 Filter core that stability is good Pending CN113599884A (en)

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Application publication date: 20211105