CN211078709U

CN211078709U - Composite active carbon filter element

Info

Publication number: CN211078709U
Application number: CN201921855242.3U
Authority: CN
Inventors: 刘学蛟; 翟世辉; 潘蓓蓓
Original assignee: Kecharan Xiamen New Materials Co ltd
Current assignee: Kecharan Xiamen New Materials Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-24
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a composite activated carbon filter element, include filter core substrate and be located the multilayer activated carbon adsorption layer on the filter core substrate periphery wall, multilayer activated carbon adsorption layer includes by outer to interior mesoporous activated carbon layer that sets up according to the preface, first micropore activated carbon layer, year silver-colored activated carbon layer and second micropore activated carbon layer, on each activated carbon layer solidified the shaping and was fixed in the inlayer object by the activated carbon and the inorganic bonding agent that correspond, and make filter core substrate and each activated carbon layer form wholly, can adsorb and degrade the purpose of the novel pollutant of more low concentration simultaneously with realizing a filter core.

Description

Composite active carbon filter element

Technical Field

The utility model relates to a water purification filter core field specifically relates to a compound active carbon filter core reaches.

Background

As the water environment is affected more and more by industrial and human activities, untreated sewage enters a drinking water system, and human beings are more easily exposed to macromolecular toxic micro-organic matters with extremely strong water solubility, thus causing potential threats to the health of residents.

Activated carbon is one of important adsorbing materials of a water purification filter element and is widely used. The ash content of the activated carbon is generally low, the risk of releasing harmful components is extremely low, and the huge specific surface area and the controllable surface property of the activated carbon enable the activated carbon to have excellent adsorption capacity on various pollutants in water, and particularly have good removal effect on organic pollutants. But the pore structure of the active carbon determines whether the macromolecular organic matters can be adsorbed and fixed by the active carbon. When the pore channel is mainly microporous, macromolecular organic matters may not enter the pore channel of the activated carbon due to the inconsistency of molecular size or shape, so that the macromolecular organic matters cannot be firmly adsorbed and fixed, and the adsorption capacity of the activated carbon is low. Therefore, how to make the small molecular and large molecular organic matters enter the pore channels of the activated carbon and be fixed is one of the problems to be solved by using the activated carbon as a terminal water purification material. In addition, the microbial safety of the activated carbon is reduced by the reproduction of microorganisms on the surface of the activated carbon.

The existing preparation methods of water purification filter elements are that different adsorbing materials are mixed according to a certain proportion, and then a forming process is adopted to form the filter element. For example, patent publication No. CN108722015A discloses a filter element solution which combines functions of adsorption, flocculation, and catalytic degradation into a whole by compounding porous carbon, graft amphoteric chitosan, and modified titanium dioxide. 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 publication No. 103463867a discloses a filter element prepared by mixing nano titanium dioxide, white clay, bauxite, zirconium fluoride, glycerol triglyceride, polypropylene, microcrystalline wax, nano silicon dioxide, sodium metasilicate, bamboo charcoal powder and modified attapulgite. 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.

The solution disclosed in the above patent has the following problems: (1) the filter element is provided with a plurality of kinds of materials, so that the safety of the materials in the filter element is not easy to guarantee and trace. (2) The uniformity of the filter element material after mechanical mixing cannot be guaranteed, so that the quality of the filter element product is uneven. (3) The nanometer materials are used in some patents, and the loss risk and the health risk to human bodies are increased only by a uniform mixing mode.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compound activated carbon filter core to realize that a filter core can adsorb simultaneously and degrade the purpose of the novel pollutant of more low concentrations.

The specific scheme is as follows:

the utility model provides a composite activated carbon filter core, includes filter core substrate and is located the multilayer activated carbon adsorption layer on the filter core substrate periphery wall, multilayer activated carbon adsorption layer includes by outer to interior mesoporous activated carbon layer that sets up according to the preface, first micropore activated carbon layer, carry silver-colored activated carbon layer and second micropore activated carbon layer, on each activated carbon layer solidified the shaping and was fixed in the inlayer object by the activated carbon and the inorganic bonding agent that correspond, and made filter core substrate and each activated carbon layer form wholly.

Furthermore, the thickness of each active carbon layer in the multiple active carbon adsorption layers is 10-20 mm.

Furthermore, the particle size of the activated carbon in each activated carbon layer in the multiple activated carbon adsorption layers is between 80 and 300 meshes.

Further, the filter element substrate is a pipe made of polypropylene material.

The utility model provides a compound activated carbon filter core compares with prior art and has following advantage: the utility model provides an on each active carbon layer among the composite activated carbon filter core solidified the shaping and is fixed in the inlayer object by corresponding active carbon and inorganic adhesive, and each active carbon layer and filter core substrate form wholly, and the boundary line is obvious between each active carbon layer and realize the function that corresponds separately, so that this composite activated carbon filter core can adsorb and change heavy metal ion simultaneously, the degradation organic matter suppresses microorganism and grows, realized collecting the multipurpose in a core, and the filter core volume that simply piles up relatively current is littleer, the miniaturized design of water purification unit of can being convenient for, and the change of the filter core of also being convenient for.

Drawings

Fig. 1 shows a schematic cross-sectional view of a composite activated carbon filter element.

Detailed Description

To further illustrate the embodiments, the present 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. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Example 1

As shown in fig. 1, the present embodiment provides a composite activated carbon filter element, which includes a filter element substrate 10 and a plurality of activated carbon adsorption layers located on the outer peripheral wall of the filter element substrate 10, wherein the plurality of activated carbon adsorption layers are a mesoporous activated carbon layer 20, a first microporous activated carbon layer 21, a silver-loaded activated carbon layer 22, and a second microporous activated carbon layer 23 in sequence from outside to inside.

The pore size of the activated carbon in the outermost mesoporous activated carbon layer 20 is 2-50 nm, and the activated carbon has the function of adsorbing and fixing macromolecular organic pollutants in water so as to reduce the risk of blocking and secondary release of the macromolecular organic matters on the first microporous activated carbon layer 21.

The pore size of the activated carbon in the first microporous activated carbon layer 21 of the second layer is not more than 2nm, and the activated carbon has the function of adsorbing and fixing micromolecular organic matters and other micromolecular inorganic matters in water. The first microporous activated carbon layer 21 has relatively high adsorption efficiency, can adsorb and fix more small molecular substances, and retains substances that are not adsorbed by the outer mesoporous activated carbon layer 20.

The silver ions in the silver-loaded activated carbon layer 22 of the third layer can degrade part of organic matters (such as chlorine-containing volatile organic matters) to convert the organic matters into inorganic matters and/or small-molecule organic matters, and can inhibit the microbial growth on the surface of the activated carbon so as to improve the microbial safety. The activated carbon in the silver-loaded activated carbon layer 22 in this embodiment is prepared by in-situ reduction based on the nano zero-valent iron-loaded activated carbon, and no reducing agent is added in the in-situ reduction process, so that no other substance is introduced, and the safety of the activated carbon in the silver-loaded activated carbon layer 22 can be ensured (preferably, an in-situ reduction equation can be provided).

The pore size of the activated carbon in the innermost second microporous activated carbon layer 23 is not more than 2nm, and the activated carbon has the function of adsorbing part of micromolecular organic matters degraded by the silver-loaded activated carbon layer 22, so that the taste of water quality can be further improved. And the silver ions released by the silver-loaded activated carbon layer 22 can also inhibit the growth of microorganisms in the second microporous activated carbon layer 23, so as to further improve the microbial safety.

Each active carbon layer is formed by curing corresponding active carbon and inorganic adhesive such as sodium silicate and the like and is fixed on an inner layer object, so that each active carbon layer and the filter element substrate 10 form a whole, and the boundary line between each active carbon layer is obvious to realize the corresponding function, so that the composite active carbon filter element can simultaneously adsorb and convert heavy metal ions, degrade organic matters and inhibit the growth of microorganisms, thereby realizing the integration of multiple purposes into one element, and the volume of the filter element which is relatively smaller than that of the existing simply stacked filter element is smaller, thereby being convenient for the miniaturization design of water purifying equipment and being convenient for the replacement of the filter element.

The particle size of the activated carbon corresponding to each activated carbon layer is between 80 and 300 meshes, and after the activated carbon particles in the particle size range are formed, the water flow contact area is large, the retention time is ideal, and the purification effect is better.

The thickness of each activated carbon layer is preferably 10-20 mm, and the balance between the cost and the purification effect of each activated carbon layer can be realized within the thickness range.

Wherein the filter core substrate in this embodiment is the pipe fitting of being made by polypropylene (PP) material, and the pipe fitting of PP making can promote its homogeneity with the contact of inorganic binder in the active carbon suspension, guarantees that the even adhesion of the second micropore active carbon layer 23 of inlayer can be on the outer wall of PP pipe fitting to the PP pipe fitting is also convenient for process, has more cost advantage.

The composite activated carbon filter element provided by the embodiment can be prepared by the following preparation method, and the preparation method comprises the following steps:

s1, preparing a mesoporous activated carbon suspension, a first microporous activated carbon suspension, a silver-loaded activated carbon suspension and a second microporous activated carbon suspension, and adding corresponding activated carbon, inorganic binder and pure water into a container during preparation to be uniformly stirred and mixed so as to prepare suspensions corresponding to each activated carbon. The suspension of this example was specifically formulated as follows, first using sodium silicate as the inorganic binder, wherein the molar ratio of sodium silicate to water was 2: 1-3: 1, forming a suspension with proper viscosity, adding a proper amount of activated carbon particles into the suspension, and stirring to uniformly distribute the activated carbon particles in the suspension, wherein the mass ratio of the activated carbon to the suspension is preferably 0.3: 1-0.8: 1.

S2, placing the filter element substrate in the second microporous activated carbon suspension, the silver-loaded activated carbon suspension, the first microporous activated carbon suspension and the mesoporous activated carbon suspension in sequence, and rotating at a certain rotating speed in the corresponding activated carbon suspension to enable the corresponding suspensions to be adsorbed on the surface of the inner layer object, so as to obtain a corresponding activated carbon layer with a certain thickness. It should be clear that there is a step of pre-drying and forming when preparing an activated carbon layer, for example, after the filter element substrate is placed in the second microporous activated carbon suspension to prepare the second microporous activated carbon layer, the second microporous activated carbon layer on the filter element substrate needs to be pre-dried and formed before being placed in the silver-loaded activated carbon suspension, and the drying and forming step can be implemented by natural drying or heat drying. In addition, the thickness of each activated carbon layer produced can be determined by the rotation time of the filter element substrate in the corresponding suspension.

Preferably, the rotation speed of the filter element substrate in each suspension of the second microporous activated carbon suspension, the silver-loaded activated carbon suspension, the first microporous activated carbon suspension and the mesoporous activated carbon suspension is gradually reduced, and preferably, the filter element substrate is molded in each suspension of the second microporous activated carbon suspension, the silver-loaded activated carbon suspension, the first microporous activated carbon suspension and the mesoporous activated carbon suspension at the rotation speeds of 300r/min, 250r/min, 200r/min and 150 r/min.

S3, heating and drying the filter element base material processed in the step S2 to dry and form each activated carbon layer on the filter element base material so as to obtain the composite activated carbon filter element.

The preparation method of the composite activated carbon filter element provided by the embodiment sequentially forms layers on the filter element substrate in a wet forming mode, the process is simple and easy to implement, and other impurities cannot be introduced in the forming process to influence the safety of the filter element.

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

1. A composite active carbon filter element is characterized in that: including filter core substrate and be located the multilayer activated carbon adsorption layer on the filter core substrate periphery wall, multilayer activated carbon adsorption layer includes by outer to interior mesoporous activated carbon layer, first micropore activated carbon layer, year silver-colored activated carbon layer and the second micropore activated carbon layer that sets up according to the preface, on each activated carbon layer solidified the shaping and was fixed in the inlayer object by the activated carbon and the inorganic adhesive that correspond, and made filter core substrate and each activated carbon layer form wholly.

2. The composite activated carbon filter element of claim 1, wherein: the thickness of each active carbon layer in the multiple active carbon adsorption layers is 10-20 mm.

3. The composite activated carbon filter element of claim 1, wherein: the particle size of the active carbon in each active carbon layer in the multiple active carbon adsorption layers is between 80 and 300 meshes.

4. The composite activated carbon filter element of claim 1, wherein: the filter element base material is a pipe fitting made of polypropylene material.

5. The composite activated carbon filter element of claim 1, wherein: the activated carbon in the silver-loaded activated carbon layer is prepared by carrying nano zero-valent iron activated carbon through in-situ reduction.