CN111672205A - Activated carbon-based composite filter element - Google Patents

Activated carbon-based composite filter element Download PDF

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Publication number
CN111672205A
CN111672205A CN202010562869.0A CN202010562869A CN111672205A CN 111672205 A CN111672205 A CN 111672205A CN 202010562869 A CN202010562869 A CN 202010562869A CN 111672205 A CN111672205 A CN 111672205A
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activated carbon
filter
filter element
graphene
loaded activated
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刘学蛟
汪印
潘蓓蓓
李智伟
徐清馨
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Institute of Urban Environment of CAS
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Institute of Urban Environment of CAS
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    • 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
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2055—Carbonaceous material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1241—Particle diameter
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The invention relates to an active carbon-based composite filter element, which comprises a filter element shell with a flow channel, wherein the two ends of the flow channel are respectively a water inlet end and a water outlet end, and a filter material is arranged in the flow channel, and the active carbon-based composite filter element is characterized in that: the filter material is from intaking and to going out water end direction according to the preface including first filter layer, second filter layer and third filter layer, and the filter material in the first filter layer is for carrying silver-colored activated carbon, and the filter material in the second filter layer is for carrying graphite alkene activated carbon, and the filter material in the third filter layer is unmodified activated carbon to solve the limited problem of current water purification filter core water purification effect.

Description

Activated carbon-based composite filter element
Technical Field
The invention relates to the field of water purification filter elements, in particular to an active carbon-based composite filter element.
Background
The quality of the terminal water is related to the health of people. Along with the improvement of the requirements of people on water quality, higher requirements are made on a water treatment technology, and particularly the problem of secondary pollution of terminal water generated along with the transportation of a pipe network is solved. The terminal water purification technology is one of the important ways to solve the above problems. In the terminal water purification technology, compared with a common activated carbon adsorption method, the method can remove various pollutants in water through adsorption, catalysis and other modes, realize the deep purification of terminal water, and ensure the water safety.
Different pollutant molecules have different molecular structures and sizes, and the higher the matching degree of the pollutant molecules with the pore structure and the surface chemical properties of the activated carbon, the more ideal the adsorption efficiency is. For example, the size of heavy metal ions is small, and theoretically, the adsorption effect of microporous activated carbon is ideal. However, most of the surface of the activated carbon has hydrophobic properties, so that the adsorption efficiency is not ideal. Part of heavy metal ions in the form of oxygen-containing negative ions generate electrostatic repulsion with negative charges on the surface of the activated carbon, and secondary release pollution caused by saturation is easy to achieve; the residual disinfectant and the disinfection by-product have small molecules, and the microporous activated carbon has ideal adsorption efficiency. For emerging organic pollutants, the molecular size is usually large, and the adsorption capacity of microporous activated carbon is not ideal. The active carbon has limited effect on pathogenic microorganisms, but the microorganisms are possibly bred due to organic matters adsorbed on the surface. In conclusion, aiming at various problems in water, a good deep purification effect cannot be realized by one type of activated carbon; in addition, the activated carbon only adsorbs, intercepts and enriches pollutant molecules, and most adsorbed pollutants cannot be degraded or converted, so that potential secondary release risks are caused.
Therefore, some counter-senses suggest that the activated carbon is used as a base, and the purpose of reducing the risk of secondary release is realized by organically combining the advantages of different types of activated carbon and thoroughly removing pollutants in water through synergistic adsorption and transformation or degradation. For example, patent publication No. CN108585068A discloses a method for manufacturing an activated carbon rod, which comprises activated carbon, magnesium porphyrin compound (natural deodorant), nano bentonite, calcium based montmorillonite, sodium based montmorillonite (bacterial inhibitor), and the like. The patent with publication number CN107158805A discloses a multifunctional composite ceramic filter element loaded with activated carbon, kaolin, diatom ooze, bauxite, magnesium oxide, calcium bentonite, binder, decondensation agent, organic pore-forming agent, inorganic pore-forming agent and nano-exchanger, which are prepared by slip casting process. Patent publication No. CN108722015A discloses a filter element solution by compounding porous carbon, graft type amphoteric chitosan and modified titanium dioxide. At present, different water purification materials are added during preparation of the filter element, the variety is wide, the safety of each material is difficult to trace during use, and the performance of the filter element is also influenced by the mixing uniformity.
In addition, in the water purification product, the direct filling of the activated carbon is a common filter element manufacturing mode, the filter element manufactured by the filling mode is simple and easy to manufacture, the water flux is large during the use, a booster pump is not needed, and no waste water is generated. However, due to the short plates described in the previous section, at higher flow rates, insufficient contact time between the contaminant molecules and the activated carbon results in an unsatisfactory removal.
Disclosure of Invention
The invention aims to provide an active carbon-based composite filter element to solve the problem that the water purifying effect of the existing water purifying filter element is limited.
The specific scheme is as follows:
the utility model provides an active carbon base composite filter element, is including the filter core casing that has a runner, and the both ends of this runner are intake end and play water end respectively, install the filter material in the runner, the filter material is followed the end of intaking and is included first filter layer, second filter layer and third filter layer according to the preface toward going out water end direction, and the filter material in the first filter layer is for carrying silver-colored active carbon, and the filter material in the second filter layer is for carrying graphite alkene active carbon, and the filter material in the third filter layer is unmodified active carbon.
Preferably, the particle size of the silver-loaded activated carbon is 8-20 meshes, the particle size of the graphene-loaded activated carbon is 20-40 meshes, and the particle size of the unmodified activated carbon is 8-40 meshes.
Preferably, the volume ratio of the silver-loaded activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the filter material is 3-8: 1-6: 1.
preferably, the first filter layer is a first carbon block made of silver-loaded activated carbon, and the second filter layer is a second carbon block made of graphene-loaded activated carbon.
Preferably, the thickness of the first carbon block is 5-10 mm, and the thickness of the second carbon block is 5-10 mm.
Preferably, the first carbon block is prepared by a process comprising,
s11, preparing silver-loaded activated carbon slurry, wherein the silver-loaded activated carbon slurry consists of an inorganic adhesive and silver-loaded activated carbon;
s21, placing the block-shaped filter element mold into the silver-loaded activated carbon slurry to prepare a silver-loaded activated carbon block-shaped filter element;
and S31, drying the silver-loaded activated carbon block filter element processed in the step S21 to dry and mold the silver-loaded activated carbon block filter element, and removing the block filter element mold after molding to obtain the first carbon block.
Preferably, the preparation method of the second carbon block comprises the following steps:
s12, preparing graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry consists of an inorganic adhesive and graphene-loaded activated carbon;
s22, putting the block-shaped filter element mold into the graphene-loaded activated carbon slurry to prepare a graphene-loaded activated carbon block-shaped filter element;
and S32, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S22 to dry and mold the graphene-loaded activated carbon block-shaped filter element, and removing the block-shaped filter element mold after molding to obtain a second carbon block.
Preferably, the first filter layer and the second filter layer are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the third filter layer is positioned at the water outlet end of the filter element shell, a partition board corresponding to the connection part of the first filter layer and the second filter layer is arranged in the filter element shell, and a mounting hole matched with the filter stick is formed in the middle of the partition board.
Preferably, the preparation method of the filter stick is as follows:
s13, preparing graphene-loaded activated carbon slurry and graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon, and the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon;
s23, placing one section of the rod-shaped filter element mold into graphene-loaded activated carbon slurry or graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mold, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness;
s33, placing the other section of the rod-shaped filter element mold into the other section of the graphene-loaded activated carbon slurry or the graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mold, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness;
and S43, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S33 to dry and mold the graphene-loaded activated carbon block-shaped filter element, removing the rod-shaped filter element mold after molding, and installing plugs at two ends to obtain the filter stick.
Preferably, the first filter layer and the second filter layer are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the filter stick is arranged along the axial direction of the filter element shell, a partition board corresponding to the connection position of the first filter layer and the second filter layer is arranged in the filter element shell, a mounting hole matched with the filter stick is formed in the middle of the partition board, a first cavity and a second cavity which are mutually isolated are formed between the outer wall of the filter stick and the inner wall of the filter element shell, the first cavity is close to a water inlet end, the second cavity is close to a water outlet end, a fourth filter layer is filled in the first cavity, the second cavity is filled with a third filter layer, and a filter material in the fourth filter layer is unmodified activated carbon.
Compared with the prior art, the active carbon-based composite filter element provided by the invention has the following advantages: the active carbon-based composite filter element provided by the invention organically combines modified and unmodified active carbon, and has the advantages of particle filling and forming, so that different water purification technologies and use requirements are flexibly met. The modified silver-loaded activated carbon and graphene-loaded activated carbon can improve the water purification efficiency, and can adsorb and convert heavy metal ions, degrade organic matters and inhibit the growth of microorganisms.
Drawings
Fig. 1 shows a schematic view of an activated carbon-based composite filter element in example 1.
Fig. 2 is a tabular chart of experimental data for lead ion removal for # 1 composite filter element.
Fig. 3 is a tabular chart of experimental data for lead ion removal for # 2 composite filter element.
Fig. 4 is a tabular chart of experimental data for lead ion removal for # 3 composite filter element.
Fig. 5 is a tabular chart of experimental data for lead ion removal for # 4 composite filter element.
Fig. 6 shows a schematic view of an activated carbon-based composite filter element in example 2.
Fig. 7 shows a schematic view of an activated carbon-based composite filter element in example 3.
Fig. 8 shows a schematic view of an activated carbon-based composite filter element in example 4.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, the present embodiment provides an activated carbon-based composite filter element, which includes a filter element housing 1 having a flow channel, a water inlet end 11 and a water outlet end 12 are respectively disposed at two ends of the flow channel, and a filter material is disposed in the flow channel.
The filter material sequentially comprises a first filter layer 21, a second filter layer 22 and a third filter layer 23 from the water inlet end 11 to the water outlet end 12, the filter material in the first filter layer 21 is silver-loaded activated carbon, the filter material in the second filter layer 22 is graphene-loaded activated carbon, and the filter material in the third filter layer 23 is unmodified activated carbon.
Wherein, the silver-loaded activated carbon in the first filter layer 21 is prepared by in-situ reduction on the basis of the nano zero-valent iron-loaded activated carbon, and the equation of the in-situ reduction is 2Ag++Fe0＝2Ag+Fe2+. No reducing agent is added in the in-situ reduction process, so that other substances are not introduced, and the safety of the activated carbon can be ensured. The particle size of the silver-loaded activated carbon is preferably 8-20 meshes, the silver-loaded activated carbon has the functions of converting heavy metal ions or degrading partial organic matters (such as chlorine-containing volatile organic matters), converting the heavy metal ions into low-toxicity or non-toxic inorganic matters and/or small molecular organic matters, and inhibiting the growth of microorganisms on the surface of the activated carbon so as to improve the safety of the microorganisms.
The graphene-loaded activated carbon in the second filter layer 22 is obtained by adding acidified activated carbon into a graphene oxide aqueous solution for modification, and reduces stacking of graphene itself through mutual adsorption and complexation between activated carbon and graphene, and simultaneously synergistically improves adsorption performance of activated carbon itself. Wherein the particle size of the graphene-loaded activated carbon is preferably 20-40 meshes. The second filter layer 22 is used for rapidly adsorbing small molecular organic matters which are not adsorbed and degraded by the first filter layer 21, simultaneously improving the adsorption capacity of the activated carbon, prolonging the service life, and simultaneously adsorbing silver ions released from the first filter layer 21, thereby reducing the health risk possibly brought by the upper activated carbon.
The filter material in the third filter layer 23 is unmodified activated carbon, which can further filter particulate matters in water, ensure the cleanness of the effluent and improve the taste of the water, and the particle size of the unmodified activated carbon is preferably 8-40 meshes.
The activated carbon-based composite filter element provided by the embodiment organically combines modified and unmodified activated carbon, and can cooperate with the advantages of particle filling and molding, so that different water purification technologies and use requirements can be flexibly met. The modified silver-loaded activated carbon and graphene-loaded activated carbon can improve the water purification efficiency, and can adsorb and convert heavy metal ions, degrade organic matters and inhibit the growth of microorganisms.
Referring to fig. 1, the performance of the activated carbon-based composite filter element is verified by taking a water purification kettle as an example in the embodiment. The filter element shell 1 is made of polypropylene, two layers of filter screens 13 are arranged in the flow channel, three spaces are separated in the filter element shell 1, and the three spaces are filled with silver-loaded activated carbon, graphene-loaded activated carbon and unmodified activated carbon from the water inlet end 11 to the water outlet end 12. The water inlet end is provided with a layer of PP cotton 14, so that the purpose of primary filtration of inlet water is realized.
In this embodiment, 4 composite filter elements are prepared, which are respectively defined as a # 1 filter element, a # 2 filter element, a # 3 filter element and a # 4 filter element, wherein the volume ratio of the silver-loaded activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the # 1 filter element is 8: 1: 1; the volume ratio of the silver-loaded activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the No. 2 filter element is 5: 4: 1; the volume ratio of the silver-loaded activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the No. 3 filter element is 3: 6: 1; the volume ratio of the silver activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the No. 4 filter element is 0: 0: 10.
the performance test adopts a lead ion continuous labeling experiment method, and the experiment device is automatically controlled and automatically records the flow speed and the water outlet flow. And (3) adopting a dilution method to prepare a solution in the standard adding device, and sampling under different flow conditions. In the embodiment, lead ions are used as a standard substance, a whole-process standard adding mode is adopted, the initial concentration of the lead ions in the standard adding liquid is 100 mug/L, the pH value is about 6.50, the testing flow rate is about 0.45mL/min, and the water passing amount is 1000L. In the labeling experiment, samples were taken at 0L, 10L, 50L, 100L, 200L, 400L, 600L, 800L and 1000L, respectively, and a blank sample and a filtered sample were taken during sampling, and two parallel samples were taken respectively. 10mL of the solution is sampled for each time, filtered by a 0.22 mu M membrane, dropped with 0.1M nitric acid, mixed evenly and stored, and tested by ICP-MS.
Specific results are shown in fig. 2-5. The results show that under the test conditions, the 1# composite filter element can remove more than 90% of lead ions, the 2# composite filter element can remove more than 70% of lead ions, and the 3# composite filter element can remove more than 60% of lead ions. The removal rate of the lead ions is obviously superior to that of unmodified activated carbon. In addition, the larger the proportion of the silver-loaded activated carbon is, the better the removal rate of the silver-loaded activated carbon to lead ions is, the effect of the silver-loaded activated carbon to convert heavy metal ions is proved, and the removal efficiency of the lead ions is not obviously reduced along with the increase of the water flux, and the degree of reduction of the removal efficiency of the modified activated carbon to the lead ions is larger.
Example 2
Referring to fig. 6, this embodiment also provides an activated carbon-based composite filter element, which has a structure substantially the same as that of the activated carbon-based composite filter element provided in embodiment 1, except that the first filter layer 21 is a first carbon block made of silver-loaded activated carbon, and the second filter layer 22 is a second carbon block made of graphene-loaded activated carbon. Compared with the granular silver-loaded activated carbon and the granular graphene-loaded activated carbon in the embodiment 1, the blocky silver-loaded activated carbon and the blocky graphene-loaded activated carbon can be directly placed in the filter element shell 1 without a filter screen, and can be flexibly used in different scenes by adjusting the use ratio.
Furthermore, the thickness of the first carbon block is 5-10 mm, and the thickness of the second carbon block is 5-10 mm.
Wherein the preparation method of the first carbon block comprises the following steps,
s11, preparing the slurry of the silver-loaded activated carbon, wherein the slurry of the silver-loaded activated carbon consists of an inorganic adhesive and the silver-loaded activated carbon.
And S21, putting the block-shaped filter element mould into the silver-loaded activated carbon slurry to prepare the silver-loaded activated carbon block-shaped filter element.
And S31, drying the silver-loaded activated carbon block filter element processed in the step S21 to dry and mold the silver-loaded activated carbon block filter element, and removing the block filter element mold after molding to obtain the first carbon block.
The preparation method of the second carbon block is as follows:
s12, preparing graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry is composed of an inorganic binder and graphene-loaded activated carbon.
And S22, putting the block-shaped filter element mold into the graphene-loaded activated carbon slurry to prepare the graphene-loaded activated carbon block-shaped filter element.
And S32, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S22 to dry and mold the graphene-loaded activated carbon block-shaped filter element, and removing the block-shaped filter element mold after molding to obtain a second carbon block.
Example 3
Referring to fig. 7, the present embodiment also provides an activated carbon-based composite filter element, which includes a filter element housing 1 having a flow channel, wherein the flow channel has a water inlet end 11 and a water outlet end 12 at two ends, and a filter material is installed in the flow channel.
The filter material sequentially comprises a first filter layer 21, a second filter layer 22 and a third filter layer 23 from the water inlet end 11 to the water outlet end 12, the filter material in the first filter layer 21 is silver-loaded activated carbon, the filter material in the second filter layer 22 is graphene-loaded activated carbon, and the filter material in the third filter layer 23 is unmodified activated carbon.
The first filter layer 21 and the second filter layer 22 are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the third filter layer 23 is located at the water outlet end 12 of the filter element housing 1, a partition plate 15 corresponding to the joint of the first filter layer 21 and the second filter layer 22 is arranged in the filter element housing 1, a mounting hole matched with the filter stick is arranged in the middle of the partition plate 15, and the water flow direction of the activated carbon-based composite filter element is shown as the arrow direction in fig. 7. Compared with the activated carbon-based composite filter element in the embodiment 1 or 2, the activated carbon-based composite filter element in the embodiment has the advantages that the first filter layer 21 and the second filter layer 22 of the activated carbon-based composite filter element enter and exit water from the side wall direction, and the filtering effect can be better under the filtering occasion with small inner diameter.
The preparation method of the integrally formed hollow columnar filter stick comprises the following steps:
s13, preparing graphene-loaded activated carbon slurry and graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon, and the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon.
S23, placing one section of the rod-shaped filter element mold into the graphene-loaded activated carbon slurry or one section of the graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mold, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness.
And S33, placing the other section of the rod-shaped filter element mould into the other section of the graphene-loaded activated carbon slurry or the graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mould, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness.
And S43, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S33 to dry and mold the graphene-loaded activated carbon block-shaped filter element, removing the rod-shaped filter element mold after molding, and installing plugs at two ends to obtain the filter stick.
Example 4
Referring to fig. 8, the present embodiment also provides an activated carbon-based composite filter element, which includes a filter element housing 1 having a flow channel, wherein the flow channel has a water inlet end 11 and a water outlet end 12, respectively, and a filter material is disposed in the flow channel.
The filter material sequentially comprises a fourth filter layer 24, a first filter layer 21, a second filter layer 22 and a third filter layer 23 from the water inlet end 11 to the water outlet end 12, the filter material in the first filter layer 21 is silver-loaded activated carbon, the filter material in the second filter layer 22 is graphene-loaded activated carbon, and the filter material in the third filter layer 23 and the filter material in the fourth filter layer 24 are both unmodified activated carbon.
The first filter layer 21 and the second filter layer 22 are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the filter stick is arranged along the axial direction of the filter element shell 1, a partition plate 15 corresponding to the joint of the first filter layer 21 and the second filter layer 22 is arranged in the filter element shell 1, the middle of the partition plate 15 is provided with a mounting hole matched with the filter stick, a first cavity and a second cavity which are mutually isolated are separated between the outer wall of the filter stick and the inner wall of the filter element shell 1, wherein the first cavity is close to a water inlet end, the second cavity is close to a water outlet end, the first cavity is filled with the fourth filter layer 24, the second cavity is filled with the third filter layer 23, and the water flow direction of the activated carbon-based composite filter element is shown as the arrow direction in figure 8.
The first filter layer 21 and the second filter layer 22 of the activated carbon-based composite filter element in the embodiment enter and exit water from the side wall direction, and can have a better filtering effect on the filtering occasion with a small inner diameter.
In addition, the preparation method of the filter stick is the same as that of the filter stick in embodiment 3, and the description thereof is omitted.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides an active carbon base composite filter, is including the filter core casing that has a runner, and the both ends of this runner are intake end and play water end respectively, install filter material, its characterized in that in the runner: the filter material sequentially comprises a first filter layer, a second filter layer and a third filter layer from the water inlet end to the water outlet end, the filter material in the first filter layer is silver-loaded activated carbon, the filter material in the second filter layer is graphene-loaded activated carbon, and the filter material in the third filter layer is unmodified activated carbon.
2. The activated carbon-based composite filter element according to claim 1, wherein: the particle size of the silver-loaded activated carbon is 8-20 meshes, the particle size of the graphene-loaded activated carbon is 20-40 meshes, and the particle size of the unmodified activated carbon is 8-40 meshes.
3. The activated carbon-based composite filter element according to claim 1, wherein: the volume ratio of the silver-loaded activated carbon to the graphene-loaded activated carbon to the unmodified activated carbon in the filter material is 3-8: 1-6: 1.
4. the activated carbon-based composite filter element according to claim 1, wherein: the first filter layer is a first carbon block made of silver-loaded activated carbon, and the second filter layer is a second carbon block made of graphene-loaded activated carbon.
5. The activated carbon-based composite filter element according to claim 4, wherein: the thickness of the first carbon block is 5-10 mm, and the thickness of the second carbon block is 5-10 mm.
6. The activated carbon-based composite filter element according to claim 4, wherein the first carbon block is prepared by the following method,
s11, preparing silver-loaded activated carbon slurry, wherein the silver-loaded activated carbon slurry consists of an inorganic adhesive and silver-loaded activated carbon;
s21, placing the block-shaped filter element mold into the silver-loaded activated carbon slurry to prepare a silver-loaded activated carbon block-shaped filter element;
and S31, drying the silver-loaded activated carbon block filter element processed in the step S21 to dry and mold the silver-loaded activated carbon block filter element, and removing the block filter element mold after molding to obtain the first carbon block.
7. The activated carbon-based composite filter element according to claim 4, wherein the second carbon block is prepared by the following method:
s12, preparing graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry consists of an inorganic adhesive and graphene-loaded activated carbon;
s22, putting the block-shaped filter element mold into the graphene-loaded activated carbon slurry to prepare a graphene-loaded activated carbon block-shaped filter element;
and S32, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S22 to dry and mold the graphene-loaded activated carbon block-shaped filter element, and removing the block-shaped filter element mold after molding to obtain a second carbon block.
8. The activated carbon-based composite filter element according to claim 1, wherein: the first filter layer and the second filter layer are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the third filter layer is positioned at the water outlet end of the filter element shell, a partition board corresponding to the connection part of the first filter layer and the second filter layer is arranged in the filter element shell, and a mounting hole matched with the filter stick is formed in the middle of the partition board.
9. The activated carbon-based composite filter element according to claim 8, wherein the preparation method of the filter stick is as follows:
s13, preparing graphene-loaded activated carbon slurry and graphene-loaded activated carbon slurry, wherein the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon, and the graphene-loaded activated carbon slurry consists of an inorganic binder and graphene-loaded activated carbon;
s23, placing one section of the rod-shaped filter element mold into graphene-loaded activated carbon slurry or graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mold, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness;
s33, placing the other section of the rod-shaped filter element mold into the other section of the graphene-loaded activated carbon slurry or the graphene-loaded activated carbon slurry, rotating the corresponding activated carbon slurry at a certain rotating speed to enable the corresponding activated carbon slurry to be adsorbed on the surface of the rod-shaped filter element mold, and pre-drying to obtain a corresponding activated carbon layer with a certain thickness;
and S43, drying the graphene-loaded activated carbon block-shaped filter element processed in the step S33 to dry and mold the graphene-loaded activated carbon block-shaped filter element, removing the rod-shaped filter element mold after molding, and installing plugs at two ends to obtain the filter stick.
10. The activated carbon-based composite filter element according to claim 1, wherein: the first filter layer and the second filter layer are integrally formed hollow columnar filter sticks, and two opposite ends of each filter stick are sealed; the filter stick is arranged along the axial direction of the filter element shell, a partition board corresponding to the connection position of the first filter layer and the second filter layer is arranged in the filter element shell, a mounting hole matched with the filter stick is formed in the middle of the partition board, a first cavity and a second cavity which are mutually isolated are formed between the outer wall of the filter stick and the inner wall of the filter element shell, the first cavity is close to a water inlet end, the second cavity is close to a water outlet end, a fourth filter layer is filled in the first cavity, the second cavity is filled with a third filter layer, and a filter material in the fourth filter layer is unmodified activated carbon.
CN202010562869.0A 2020-06-19 2020-06-19 Activated carbon-based composite filter element Pending CN111672205A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112973633A (en) * 2021-03-01 2021-06-18 中国科学院城市环境研究所 Activated carbon-based material and preparation method and application thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112973633A (en) * 2021-03-01 2021-06-18 中国科学院城市环境研究所 Activated carbon-based material and preparation method and application thereof

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