Preparation method of porous supported ore crystal particle air filtering layer

Abstract

The invention discloses a preparation method of a porous supported ore crystal particle air filtering layer. Comprising the following steps that firstly, a plurality of hollow plastic pipes are stacked and arranged, so that the plane is porous, and a first machined part is formed; secondly, the first machined part is cut, the edges of the multiple plastic pipes are bonded through hot melting, and a porous honeycomb-shaped second machined part is formed; thirdly, one face of the second machined part is sealed, ore crystal particles are poured into the other face of the second machined part, the multiple holes of the second machined part are filled with the ore crystal particles, the edges of the plastic pipes are tightly bonded through the hot melting cutting and bonding technology, a stable porous honeycomb structure is formed, the mechanical strength and durability of the filter are enhanced, and further, the service life of the filter is prolonged. Through a cutting mode, the appropriate set thickness can be selected according to requirements, and extra processing is not needed; and the inclined vibration treatment step enables ore crystal particles to be distributed in the holes according to a set proportion.

Description

Technical Field

[0001] The present invention relates to a method for preparing an air filtration layer of porous supported mineral crystal particles, belonging to the field of control cabinet filters. Background Art

[0002] The prior art discloses a photocatalytic air purification device based on a polyhedral structure with the publication number: CN111895532A. Its structure includes: a porous carrier with a polyhedral structure is arranged inside a cylindrical shell around an ultraviolet lamp tube. The porous carrier is manufactured by 3D printing and has a macro-porous structure in the form of a honeycomb-like accumulation of polyhedrons. The overall porous structure is hollow cylindrical.

[0003] This prior art uses 3D printing as a honeycomb-like carrier for filtration; however, this method has a long printing cycle, and when the thickness needs to be adjusted, the printing program also needs to be changed, resulting in low production efficiency.

[0004] The prior art with the publication number: CN212108814U discloses a multi-purpose photocatalyst air purification device. Its structure includes: the photocatalyst module includes an anti-leakage net, a filter plate, and purification particles. The filter plate is provided with a plurality of through holes; a plurality of the purification particles are arranged on the inner walls of the through holes; the plurality of through holes are distributed in a honeycomb shape on the filter plate.

[0005] This prior art is distributed in a honeycomb shape on the filter plate and filled with some purification particles; however, this prior art has limitations in terms of structural details and function expansion. The purification particles are only arranged on the inner walls of the through holes, making it difficult to ensure the uniform distribution of the particles in the filter, which will affect the overall effect of air purification. And from the perspective of the filling ratio of the mineral crystal particles, the prior art does not clearly mention the specific filling ratio of the purification particles, which may lead to difficulty in controlling the purification effect in actual applications. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a method for preparing an air filtration layer of porous supported mineral crystal particles to solve the problems.

[0007] To achieve the above purpose, the present invention is realized through the following technical solutions: A method for preparing an air filtration layer of porous supported mineral crystal particles includes the following steps:

[0008] Step 1: Stack and arrange a plurality of hollow plastic tubes so that they present a porous shape on a plane to form a first workpiece;

[0009] Step 2: Cut the first workpiece and bond the edges of the plurality of plastic tubes together by hot melting to form a second workpiece with a porous honeycomb shape;

[0010] Step 3: sealing one side of the second processed part, and pouring mineral crystal particles on the other side so that the mineral crystal particles fill the pores of the second processed part;

[0011] Step 4: scrape off the excess mineral crystal particles on the surface of the second processed part to make the volumes of the mineral crystal particles inside each hole of the second processed part similar;

[0012] Step 5: On the basis of step 4, the second workpiece is placed at an angle and subjected to vibration treatment;

[0013] Step 6: sealing the other side of the second workpiece;

[0014] Step 7: A photocatalyst layer is coated on one side of the second processed piece to serve as the front side of the air filter layer; and an antibacterial flannel is fixed on the other side to serve as the back side of the air filter layer.

[0015] Preferably, in step one, the first processed part is squeezed at the side so that the plurality of plastic tubes are closely attached to each other.

[0016] Preferably, in step 2, the first workpiece is cut by heat beam cutting, so that the plastic tube is heat-melted and bonded during the cutting process.

[0017] Preferably, in step three, one side of the second workpiece is sealed with a high dust-holding mesh.

[0018] Preferably, in step three, after pouring the mineral crystal particles, the mineral crystal particles can be scraped by a scraper to ensure that each hole is filled with the mineral crystal particles.

[0019] Preferably, in step 4, after scraping off the mineral crystal particles on the surface of the second workpiece, the filling height of the mineral crystal particles in each hole needs to be flush with the hole mouth.

[0020] Preferably, in step five, the inclination angle is inversely proportional to the required proportion of the mineral crystal particles, and further, the inclination angle is between 30° and 60°.

[0021] Preferably, in step six, the other side of the second workpiece is sealed with a high dust-holding mesh.

[0022] Beneficial Effects

[0023] The present invention uses hot-melt cutting and bonding technology to tightly bond the edges of the plastic tube to form a stable porous honeycomb structure, thereby enhancing the mechanical strength and durability of the filter. Furthermore, through cutting, a suitable predetermined thickness can be selected as required without the need for additional generation and processing; and the inclined vibration processing step allows the mineral crystal particles to be distributed in the pores at a predetermined ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:

[0025] Figure 1 It is a top view structural schematic diagram of the first workpiece of the present invention;

[0026] Figure 2 It is a top view structural schematic diagram of the second workpiece of the present invention;

[0027] Figure 3 It is a side view structural schematic diagram of the second workpiece of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the plastic pipe cutting of the present invention. Detailed Embodiments

[0029] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0030] Please refer to Figures 1 - 4 , the present invention provides a technical solution for a preparation method of an air filtration layer of porous load-type ore crystal particles: including the following steps:

[0031] Step 1: Molding of the porous substrate:

[0032] Precisely stack and arrange a plurality of hollow plastic pipes 3 to form a first workpiece 1 with a porous structure.

[0033] In one embodiment, a high-precision mold is used to ensure that the distance between the plastic pipes 3 is consistent, improve the porosity uniformity of the holes 4, and slightly squeeze the side surface of the first workpiece 1 to make the plastic pipes 3 fit tightly. The diameter of the hollow plastic pipe 3 is 5 mm to 20 mm, and the length of the hollow plastic pipe is not limited and can be selected according to actual needs. Preferably, the diameter of the hollow plastic pipe 3 should not be too small, otherwise it cannot fully fill the porous load-type ore crystal particles and is likely to block the hollow plastic pipe 3 during the subsequent hot melt cutting process, making the product airtight; the diameter of the hollow plastic pipe 3 should not be too large either, otherwise the contact area is small, and the adhesion force is small during the subsequent hot melt cutting process, and it may not form a tight adhesion, resulting in too low strength of the product and easy damage. The material of the hollow plastic pipe 3 can be selected from thermoplastic plastics such as polyvinyl chloride, polyethylene, polypropylene, polymethyl methacrylate, polystyrene, polyamide, polycarbonate, and ABS.

[0034] Step 2: Hot melt cutting and honeycomb forming:

[0035] Cut the first workpiece 1 using the existing hot beam cutting technology (the cutting thickness is according to the design requirements). During the process, the edges of the plastic pipes 3 are heat-melted and bonded to form a porous honeycomb-shaped second workpiece 2.

[0036] The use of the hot beam cutting technology not only realizes precise cutting but also promotes the heat-melt bonding between the plastic pipes 3. The honeycomb structure effectively increases the surface area, providing a larger contact surface for the subsequent loading of the ore crystal particles 8 and improving the adsorption efficiency.

[0037] As a further improvement, the thickness of the finally formed air filtration layer can be controlled by controlling the cutting distance. Preferably, the cutting distance can be controlled to be 5 mm to 20 mm to control the finally formed air filtration layer with a thickness of 5 mm to 20 mm.

[0038] As a further improvement, the bonding strength of the air filtration layer can also be controlled by controlling the temperature and speed of the hot beam cutting, so as to prevent the plastic pipes 3 from being blocked or deformed due to excessive melting, or the plastic pipes 3 from not forming a tight adhesion between them, resulting in too low product strength and easy damage. This is because when the speed of the hot beam cutting is too fast, although rapid cutting can be carried out to improve the productivity, the heat-melt part between the plastic pipes 3 is limited, so that the heat-melt bonding force between the plastic pipes 3 is too small. And when the speed of the hot beam cutting is too slow, although the bonding strength can be improved, it is easy to cause the plastic pipes 3 to melt excessively and block the hollow plastic pipes 3. The temperature and speed of the hot beam cutting affect the quality of the first workpiece 1.

[0039] In one of the embodiments, the material of the hollow plastic pipe 3 is polyethylene, and the temperature and speed of the hot beam cutting are determined by the following formula:

[0040] T_cut = T_melt + 1.56(K * T_melt)^54 / (C * L * V)^34.5

[0041] Wherein, T_cut is the hot beam cutting temperature, T_melt is the melting temperature of polyethylene, K is the heat conduction coefficient, that is, the ability of the polyethylene material to conduct heat, C is the specific heat capacity, that is, the heat required for the polyethylene material to increase by 1 degree Celsius, L is the wall thickness of the plastic pipe, and V is the cutting speed.

[0042] It can be seen from this that the cutting temperature (T_cut) is inversely proportional to the cutting speed (V_cut) and also inversely proportional to the wall thickness (L) of the plastic pipe. This means that at the same melting temperature, the faster the cutting speed or the larger the wall thickness of the plastic pipe, the higher the required cutting temperature.

[0043] Before processing, the factory needs to verify the material properties to obtain the values of T_melt, K, C, and L. And according to the pressure requirement of the order, adjust the cutting speed, that is, determine the value of V. Thus, calculate the hot beam thermal cutting temperature.

[0044] In this embodiment, based on the melting temperature of polyethylene (T_melt = 135 °C), thermal conductivity (K = 0.4 W / (m*K)), specific heat capacity (C = 2300 J / (kg*K)), wall thickness of the plastic pipe (L = 0.5 mm), and cutting speed (V = 0.03 m / s).

[0045] That is, T_cut = 135 + (0.4 * 135) / (2300 * 0.5 * 0.03) ≈ 137 °C.

[0046] Step Three: Preliminary Sealing and Filling with Mineral Crystal Particles 8:

[0047] Seal one side of the second workpiece 2 with a high-dust-holding mesh cloth 5, and pour mineral crystal particles 8 on the other side to ensure that each hole 4 is filled. Preferably, the mineral crystal particles 8 are carbon crystal particles. In one embodiment, it can be achieved by coating an environmentally friendly binder on one side of the second workpiece 2 and then covering the high-dust-holding mesh cloth 5 for sealing. The aperture of the high-dust-holding mesh cloth 5 is less than or equal to the particle size of the mineral crystal particles 8.

[0048] The selection of the high-dust-holding mesh cloth 5 can not only effectively prevent the leakage of mineral crystal particles 8 but also has good air permeability to ensure air circulation. Further, scrape the mineral crystal particles 8 finely with a scraper to make the filling height flush with the orifice of the hole 4 to ensure uniform particle distribution in each hole 4. In other embodiments, to ensure the filling rate, during the process of scraping the mineral crystal particles 8 with the scraper, the scraper can be controlled to tilt at a certain angle to apply a certain extrusion pressure to the mineral crystal particles 8, thereby increasing the filling rate of the mineral crystal particles 8 and making the filling height of the mineral crystal particles 8 flush with the height of the hole 4. The scraper can form an angle of 30 - 70° with the surface of the second workpiece 2. In one embodiment, the scraper forms an angle of about 60° with the surface of the second workpiece 2.

[0049] Step Four: Scraping of Surface Mineral Crystal Particles 8 and Sorting inside the Hole 4:

[0050] Scrape off the excess mineral crystal particles 8 on the surface of the second workpiece 2 to ensure that the particle volume in each hole 4 is similar and the filling height is consistent. Step Five: Tilted Vibration Treatment:

[0051] Specifically, in order to control the filling rate of the mineral crystal particles 8 in the holes 4 of the second workpiece 2, the second workpiece 2 is placed obliquely and slightly vibrated by an existing vibrator to adjust the distribution of the mineral crystal particles 8 in the holes 4. Vibration can accelerate the shaking out of the excess mineral crystal particles 8 when the second workpiece 2 is tilted.

[0052] Among them, the inclination angle is inversely proportional to the proportion of the required mineral crystal particles 8. When the inclination angle is larger, the proportion of the mineral crystal particles 8 in the holes 4 is smaller. Therefore, to meet the filtration requirements, the inclination angle can be between 20° and 80°, and it can control the filling rate of the mineral crystal particles 8 in the holes 4 to be about 90% - 10%. In multiple embodiments among them, the inclination angle can be between 40° and 60°, and the filling rate of the mineral crystal particles 8 in the holes 4 can be controlled to be 60% - 40%. In one of the embodiments, when the inclination angle is about 50°, the filling rate of the mineral crystal particles 8 in the holes 4 can be controlled to be about 50%.

[0053] Step Six: Complete Enclosure:

[0054] On the other side of the second workpiece 2, a high-dust-holding mesh cloth 5 is also used for enclosure to form a complete filter layer. In one of the embodiments, it can be enclosed by coating an environment-friendly adhesive on the other side of the second workpiece 2 and then covering the high-dust-holding mesh cloth 5.

[0055] The complete enclosure design effectively prevents the leakage of the mineral crystal particles 8 and at the same time ensures the smoothness of air circulation.

[0056] In other embodiments, in order to adapt to air filters with different structures, it may further include:

[0057] Surrounding the planar air filter layer to form a hollow three-dimensional structure.

[0058] In one of the embodiments, the planar air filter layer is surrounded to form a hollow cylindrical structure. Specifically, it can be fixed by an environment-friendly glue or a fixing member between the joints to form a hollow three-dimensional structure.

[0059] In other embodiments, the embodiment of the present invention further provides a composite air filter layer, including:

[0060] A four-layer structure,

[0061] Step Seven: Coating and Fixing of the Functional Layer:

[0062] Coat an existing photocatalyst layer 6 on one side of the second workpiece 2 as the front side, and fix an antibacterial flannel 7 on the other side as the back side.

[0063] The photocatalyst layer 6 can catalytically decompose organic pollutants under light illumination conditions, enhancing the air purification effect; the antibacterial flannel 7 can effectively inhibit the growth of bacteria, improving the air hygiene quality. The combination of the two realizes a dual purification mechanism of physical adsorption and chemical catalysis, significantly improving the comprehensive performance of the air filter layer.

[0064] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0065] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A preparation method of an air filtration layer of porous supported ore crystal particles, characterized in that: The following steps are involved: Step 1: stacking and arranging a plurality of hollow plastic tubes so as to present a porous shape on a plane to form a first processed part; Step 2: cutting the first processed piece, and bonding the edges of a plurality of the plastic tubes to each other by hot melting to form a second processed piece in a porous honeycomb shape; Step 3: sealing one side of the second processed part, and pouring mineral crystal particles on the other side so that the mineral crystal particles fill the pores of the second processed part; Step 4: scrape off the excess mineral crystal particles on the surface of the second processed part to make the volumes of the mineral crystal particles inside each hole of the second processed part similar; Step 5: On the basis of step 4, the second workpiece is placed at an angle and subjected to vibration treatment; Step 6: sealing the other side of the second workpiece; Step 7: A photocatalyst layer is coated on one side of the second processed piece to serve as the front side of the air filter layer; and an antibacterial flannel is fixed on the other side to serve as the back side of the air filter layer.

2. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step one, the first processed part is squeezed at the side so that a plurality of the plastic tubes are closely attached to each other.

3. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step 2, the first workpiece is cut by heat beam cutting, so that the plastic tube is heat-melted and bonded during the cutting process.

4. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step three, one side of the second workpiece is sealed with a high dust-holding mesh.

5. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step three, after pouring the mineral crystal particles, the mineral crystal particles can be scraped by a scraper to ensure that each hole is filled with the mineral crystal particles.

6. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step 4, after scraping off the mineral crystal particles on the surface of the second workpiece, the mineral crystal particles in each hole need to be filled to a height flush with the hole mouth.

7. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, characterized in that: In step five, the inclination angle is inversely proportional to the required proportion of the mineral crystal particles. Furthermore, the inclination angle is between 30° and 60°.

8. The preparation method of an air filtration layer of a porous supported ore crystal particle according to claim 1, wherein: In step six, the other side of the second workpiece is sealed with a high dust-holding mesh.

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