CN113262581A - Wall-flow type honeycomb formaldehyde-removing air conditioner filter element - Google Patents
Wall-flow type honeycomb formaldehyde-removing air conditioner filter element Download PDFInfo
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- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
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- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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Abstract
The invention relates to a wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element, wherein the formaldehyde-removing material of the air conditioner filter element is active carbon, modified active carbon, active carbon fiber, molecular sieve, manganese oxide, Au/CeO2、Au/FeOxEtc.; the supporting material is ceramic fiber or glass fiber; the inorganic adhesive is silica sol or aluminum sol; the organic adhesive is acrylic acid emulsion, epoxy resin adhesive or polystyrene emulsion, and the extrusion assistant is sesbania powder. The formaldehyde-removing material is mixed with the fibrous support, the binder and the extrusion aid and then directly molded, so that the material utilization rate is improved, and the production cost is reduced; the formaldehyde removing material adopted has better formaldehyde adsorption and decomposition effects and larger adsorption capacity, improves the porosity and the particulate matter dust adsorption rate through the fibrous supporting material, and has the air purification efficiency far higher than that of the formaldehyde adsorption and decomposition effectsAnd (5) a filter element.
Description
Technical Field
The invention relates to the field of air filtration, in particular to a wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element.
Background
With the rapid development of the world economy, industrial production and human life produce large quantities of matter such as PM2.5、NO x 、SO x And VOCs and other atmospheric pollutants, so that the air quality is sharply reduced in recent years. In order to improve the quality of air in the environment, in the fields of indoor or in-vehicle air purification, dust prevention of electromechanical communication equipment and the like, various forms of air filtering equipment are widely adopted to purify air. Generally, air purification and filtration equipment mainly aims at capturing and adsorbing dust particles and toxic and harmful gases with different particle sizes in air to achieve the aim of purifying the air. In terms of purifying dust particles, conventional air purifying and filtering devices generally adopt a combination of filter layers of fiber cloth such as electrostatic cotton, melt-blown fabric, non-woven fabric and the like to purify air. But thicker filter layers on the one hand create greater wind resistance; on the other hand, since the particulate contaminants have a small holding capacity, they usually need to be replaced after a period of use. In the aspect of adsorbing toxic and harmful gases, the conventional air purification and filtration equipment usually adopts a coating or adhesion mode and the like to add powdered or granular activated carbon adsorbing materials in the middle of fiber cloth. However, the coating and adhering process usually adopts an organic adhesive, which is easy to block the micropores of the adsorbing material and influence the adsorption performance. In addition, because both the fiber cloth and the adhesive are made of organic materials, the traditional adsorbing material cannot be activated or regenerated at high temperature. Therefore, the development of the air filter material with low wind resistance, high dust particle capacity and high formaldehyde adsorption activity has very important significance.
For example, patent CN 104056510 discloses an air conditioner filter assembly, the structure of which includes a filter layer with a filter membrane, a wind guide layer located upstream of the filter layer and having the function of guiding wind, and an adsorption layer for adsorbing formaldehyde by using nano-Ag-loaded coconut shell activated carbon particles, the filter element has a complex overall structure, and the multi-layer structure causes large wind resistance and reduces the filtering speed. According to the invention, the raw materials are mixed and then integrally extruded and molded to form the honeycomb filter material, so that the filter material has the advantages of large filter area, small wind resistance and high filter efficiency. Patent CN 211435766 discloses a photocatalyst removes air cleaner of formaldehyde, launches the ultraviolet ray after ultraviolet tube circular telegram, along with the ultraviolet ray shines the nanometer titanium dioxide layer on stainless steel net surface, carries out the work that photocatalyst removed formaldehyde, and this filter core loads the titanium dioxide layer of photocatalyst and need provide the ultraviolet source device, has improved the complexity and the cost of device on the one hand, and artificial ultraviolet light source of on the other hand can cause the pollution of another kind of form. The invention has simple structure, high material utilization rate, cost saving and no secondary pollution. Patent CN 104689708 discloses a remove formaldehyde air purification filter core based on inclined hole aluminum honeycomb panel, including removing formaldehyde coating and aluminum honeycomb panel, aluminum honeycomb panel is the platelike body of compriseing the hexagon pore, will remove formaldehyde coating and form and remove the formaldehyde coating at hexagon pore internal surface drying and solidification, reaches air-purifying's purpose through adsorbing the oxidation. The filter element is coated on the aluminum honeycomb panel through the mixture, has higher technical requirements on the uniformity and the thickness of the coating, and the adsorbability and the durability of the coating are difficult to guarantee.
Disclosure of Invention
The invention aims to provide an air filtering material which is large in filtering area, small in wind resistance, high in particle purification efficiency, simple in structure and good in formaldehyde removal effect and a preparation method thereof.
The wall-flow honeycomb-shaped efficient formaldehyde-removing air filter element is characterized in that the formaldehyde-removing material of the air filter element is activated carbon, modified activated carbon, activated carbon fiber, molecular sieve, manganese oxide, Au/CeO2、Au/FeOxEtc.; the supporting material is ceramic fiber or glass fiber; the inorganic adhesive is silica sol or aluminum sol; the organic adhesive is acrylic acid emulsion, epoxy resin adhesive or polystyrene emulsion, and the extrusion assistant is sesbania powder.
The filter element structure is a wall-flow honeycomb porous structure.
The air filter element is prepared by the following method:
the raw materials comprise the following components in parts by weight:
36-50% of supporting material, 14-22% of inorganic adhesive, 13-30% of organic adhesive, 1.5-4% of organic adhesive, 1-2.5% of extrusion aid and 8-18% of water.
a. Preparing a filter element:
uniformly mixing a formaldehyde removing material, a fibrous support material, a binder, an extrusion aid and water, and respectively stirring and pugging the mixture in a stirrer and a pugging machine for a period of time to form uniform mixed pug; and then, performing honeycomb forming on the mixed pug through hydraulic pressure and a honeycomb die, naturally drying for 24-72 h, drying for 12h at 120 ℃, and roasting for 6h at 450 ℃ to form the activated honeycomb filter material.
b. Cross hole plugging:
taking two thin plates with holes with the same size as the cross section of the honeycomb filter material, wherein the holes on the thin plates are distributed in a chessboard-like cross manner, and the shape of the holes is the same as that of the honeycomb filter material; the two orifice plates are distributed in opposite orifices. Then, organic adhesive is adopted to stick the two pore plates to the two ends of the honeycomb filter material, and the two ends are aligned to carry out cross pore blocking. And obtaining the final wall-flow honeycomb-shaped high-efficiency air filter element.
The honeycomb filter core is in a square or cuboid shape; the cross section of the pore canal is square and rectangular, and is preferably square.
The thickness of the pore wall of the pore channel is 0.5-2 mm, and the cross-sectional area of the pore channel is 0.25-100 square mm.
The filter element pore passage requires that one side is closed and the other side is open, and air flows in a single direction after passing through the pore wall.
The filter element supporting material can be high-temperature resistant fiber materials such as ceramic fiber and glass fiber.
The cross hole-plugging thin plate can be an aluminum plate, a stainless steel plate, a plastic plate and the like, and the size of the hole is equal to or slightly smaller than that of the hole channel.
The substance of the adhering pore plate and the honeycomb filter material is organic adhesive, such as acrylic emulsion adhesive.
According to the invention, one side of the pore channel is closed, so that air is filtered through the pore channel wall when being purified, the filtering area is greatly increased, the wind resistance is reduced, the filtering effect of particulate matters is effectively enhanced, and the formaldehyde adsorption and decomposition efficiency is improved.
The invention has the beneficial effects that:
1. the invention adopts formaldehyde-removing material, fibrous support, binder and extrusion aid to mix and then directly form, thereby improving the utilization rate of materials and reducing the production cost.
2. The formaldehyde removing material adopted by the invention has better formaldehyde adsorption and decomposition effects and larger adsorption capacity, improves the porosity and the particulate matter dust adsorption rate through the fibrous support material, and has air purification efficiency far higher than that of the traditional filter element.
3. The wall-flow type honeycomb porous structure is adopted, and large-area filtration is carried out through the hole walls, so that the wind resistance is smaller, the filtration area is larger, the filtration efficiency is higher, and the filtration speed is higher.
4. The invention adopts mixed extrusion molding of materials, has simple structure and simple and convenient process flow and is suitable for large-scale industrial production.
Drawings
Fig. 1 is a schematic view of an air filter cartridge according to the present invention.
Fig. 2 is a perspective view of a cartridge port channel of the present invention.
Fig. 3 is a cross-sectional view of a filter cartridge of the present invention.
Wherein 1, a filter element; 2. a duct; 3. a metal plate; 4. the bottom blocks the hole.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
(1) 200g of ceramic fibers having a diameter of about 3 μm and a length of 200 μm, 500 g of which had a specific surface area of 510m2Mixing 280 g of 30% alkaline silica sol, 30g of polystyrene emulsion, 20g of sesbania powder and 90ml of water per g of ZSM-5 molecular sieve, stirring for 30 minutes by using a stirrer, and pugging for 10 minutes in a vacuum pugging machine to obtain uniform air-free pug.
(2) Extruding the pug into a honeycomb body wet blank crude product with the cross section of 100mm multiplied by 100mm square by adopting a hydraulic press and a honeycomb mould, and cutting the honeycomb body wet blank into a 100mm multiplied by 100mm square honeycomb wet blank by a wet blank cutting machine, wherein the honeycomb holes of the honeycomb body wet blank are 2.5mm multiplied by 2.5mm square, and the hole wall thickness is 1.5 mm.
(3) And naturally air-drying the honeycomb wet blank in a room for 36h, then drying the honeycomb wet blank in a drying oven at 120 ℃ for 12h, and roasting the honeycomb wet blank in a roasting oven at 550 ℃ for 6h to form the activated honeycomb filter material (honeycomb body).
(4) And adhering the perforated aluminum plate to two ends of the honeycomb body by using acrylic emulsion to perform cross hole plugging, and finally obtaining the wall-flow honeycomb adsorption filter element.
Example 2:
(1) 220 g of ceramic fibers having a diameter of about 2 μm and a length of 500 μm, 500 g of which had a specific surface area of 1240 m2Adding 260 g of 30% neutral silica sol, 40g of polystyrene emulsion and 20g of sesbania powder into 110ml of water for mixing, stirring for 20 minutes by using a stirrer, and pugging for 20 minutes in a vacuum pugging machine to obtain uniform air-free pug.
(2) Extruding the pug into a honeycomb body wet blank crude product with the cross section of 100mm multiplied by 100mm square by adopting a hydraulic press and a honeycomb mould, and cutting the honeycomb body wet blank crude product into a cuboid honeycomb body wet blank with the cross section of 100mm multiplied by 80mm through a wet blank cutting machine, wherein the honeycomb holes of the honeycomb body wet blank are 1.5 mm multiplied by 1.5 mm square, and the hole wall thickness is 1 mm.
(3) Then the honeycomb-shaped wet blank is placed in a muffle furnace for baking for 6h at 120 ℃ after being naturally air-dried for 26h, and the honeycomb-shaped wet blank is sealed and baked for 6h at 550 ℃ to form the activated honeycomb-shaped filter material (honeycomb body).
(4) And adhering the perforated stainless steel sheet to the two ends of the honeycomb body by using acrylic emulsion to perform cross hole plugging, and finally obtaining the wall-flow honeycomb adsorption filter element.
Example 3:
(1) 200g of ceramic fibers having a diameter of about 5 μm and a length of 400mm, 580g of a specific surface area of 60m2Adding the manganese oxide, the alumina sol, the acrylic emulsion and sesbania powder into 190ml of water for mixing, stirring for 20 minutes by a stirrer, and pugging for 20 minutes in a vacuum pug mill to obtain the uniform air-free pug.
(2) Extruding the pug into a honeycomb body wet blank crude product with the cross section of 150mm multiplied by 150mm square by adopting a hydraulic press and a honeycomb mould, and cutting the honeycomb body wet blank crude product into a rectangular honeycomb body wet blank with the cross section of 150mm multiplied by 100mm by a wet blank cutting machine, wherein the honeycomb holes of the honeycomb body wet blank are 2.5mm multiplied by 2.5mm square, and the hole wall thickness is 1.5 mm.
(3) Then the honeycomb-shaped wet blank is placed in a muffle furnace for baking for 6h at 120 ℃ after being naturally air-dried for 12h, and the honeycomb-shaped wet blank is sealed and baked for 6h at 550 ℃ to form the activated honeycomb-shaped filter material (honeycomb body).
(4) And adhering the perforated plastic sheets to the two ends of the honeycomb body by using acrylic emulsion to perform cross hole plugging, and finally obtaining the wall-flow honeycomb adsorption filter element.
Example 4:
(1) 200g of glass fibers having a diameter of about 4 μm and a length of 400mm, 480g of which have a specific surface area of 1510m2Adding 30% of alkaline silica sol 250g, acrylic emulsion 30g and sesbania powder 20g into 100ml of water, stirring and mixing, stirring for 20 minutes by adopting a stirrer, and pugging for 20 minutes in a vacuum pugging machine to obtain uniform air-free pug.
(2) Extruding the pug into a honeycomb body wet blank crude product with the cross section of 100mm multiplied by 100mm square by adopting a hydraulic press and a honeycomb mould, and cutting the honeycomb body wet blank crude product into a cuboid honeycomb body wet blank with the cross section of 100mm multiplied by 100mm by cutting by a wet blank cutting machine, wherein the honeycomb holes of the honeycomb body wet blank are 2.5mm multiplied by 2.5mm square, and the hole wall thickness is 1.5 mm.
(3) Then the honeycomb-shaped wet blank is placed in a muffle furnace for drying for 6h at 120 ℃ after being naturally air-dried for 36h, and the honeycomb-shaped wet blank is sealed and roasted for 6h at 550 ℃ to form the activated honeycomb-shaped filter material (honeycomb body).
(4) And adhering the perforated plastic sheets to two ends of the honeycomb body by using an epoxy resin adhesive to perform cross hole plugging, and finally obtaining the wall-flow honeycomb adsorption filter element.
TABLE 1 windage and air purification effect of different specifications of filter element
The invention is improved by the following steps:
1. the filter element formaldehyde removing material adopts a gold-loaded manganese-phosphorus-aluminum molecular sieve, and the finished product is detected that the material accounts for 60-70%.
2. The fibrous supporting material plays a supporting role in the honeycomb forming process, is beneficial to honeycomb extrusion forming, and plays a role in filtering dust particles after being prepared into a finished product.
3. The formaldehyde removing material is added into the ceramic fiber to filter dust particles and adsorb and decompose formaldehyde at the same time.
4. And (3) extruding and molding by using a grinding tool, filtering the peripheral hole walls, wherein the thickness of the hole walls is 0.5-1.5 mm, and the cross sectional area of the hole channel is 4-10 square mm.
5. The addition of the organic adhesive is beneficial to honeycomb formation on one hand, and forms a gap structure after roasting on the other hand, so that the dust filtering effect of a finished product is improved.
Has the following advantages:
1. the filter element is formed by mixing and extruding materials, the process manufacturing flow is simple, the material utilization rate is high, the production cost is low, and the filter element is suitable for large-scale industrial production.
2. By adopting the wall-flow honeycomb porous structure, the wind resistance is smaller, the filtering area is larger, and the filtering efficiency is higher and faster through large-area filtering of the hole walls.
3. The formaldehyde removing material is prepared from activated carbon, modified activated carbon, molecular sieve, manganese oxide, cerium oxide and cobalt oxide, so that the formaldehyde adsorbing and decomposing effect is better, the adsorption capacity is higher, and the air purifying efficiency is far higher than that of the traditional filter element.
4. Except that dust particle filter effect is higher than other filter cores, also has adsorption to other materials such as formaldehyde, filtering capability is more comprehensive.
Claims (10)
1. A wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element is characterized in that the air filter element is prepared by the following method:
the raw materials comprise the following components in parts by weight:
36-50% of formaldehyde removing material, 14-22% of support material, 13-30% of inorganic adhesive, 1.5-4% of organic adhesive, 1-2.5% of extrusion aid and 8-18% of water;
preparing a filter element:
uniformly mixing a formaldehyde removing material, a supporting material, an inorganic adhesive, an organic adhesive, an extrusion aid and water, and respectively stirring and pugging in a stirrer and a pugging machine for a period of time to form uniform mixed pug; then, performing honeycomb pore channel molding on the mixed pug through hydraulic pressure and a honeycomb die, and forming an activated honeycomb filter material after natural air drying for 24-72 h, drying for 12h at 120 ℃, and roasting for 6h at 450 ℃;
b. cross hole plugging:
taking two thin plates with holes with the same size as the cross section of the honeycomb filter material, wherein the holes on the thin plates are distributed in a chessboard-like cross manner, and the shape of the holes is the same as that of the honeycomb filter material; the two pore plates are distributed in opposite pores; then, adhering two pore plates to two ends of the honeycomb filter material by using an organic adhesive, and aligning the two ends to perform cross pore blocking; and obtaining the final wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element.
2. The wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element according to claim 1, wherein the formaldehyde-removing material of the air filter element is activated carbon, modified activated carbon, activated carbon fiber, molecular sieve, manganese oxide, Au/CeO2、Au/FeOxOne or more combinations of (a); the supporting material is ceramic fiber or glass fiber; the inorganic adhesive is silica sol or aluminum sol; the organic adhesive is acrylic acid emulsion, epoxy resin adhesive or polystyrene emulsion, and the extrusion aid is sesbania powder.
3. A wall-flow honeycomb-shaped formaldehyde-removing air-conditioning filter element according to claim 1, wherein the wall-flow honeycomb-shaped formaldehyde-removing air-conditioning filter element is of a wall-flow honeycomb-shaped porous structure.
4. A wall-flow honeycomb-shaped formaldehyde-removing air-conditioning filter element according to claim 1, wherein the wall-flow honeycomb-shaped formaldehyde-removing air-conditioning filter element is of a cube or cuboid shape; the cross section of the pore canal is square or rectangular.
5. A wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element according to claim 4, wherein the cross section of the pore channels is square.
6. A wall-flow honeycomb-shaped formaldehyde-removing air-conditioning filter element according to claim 1, wherein the thickness of the walls of the channels is 0.5-2 mm, and the cross-sectional area of the channels is 0.25-100 mm.
7. A wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element according to claim 1, wherein the channels require one side to be closed and the other side to be open, and air flows in one direction after passing through the walls of the channels.
8. A wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element according to claim 1, wherein the filter element support material is one of ceramic fiber and glass fiber which is a high temperature resistant fiber material.
9. A wall-flow honeycomb-shaped formaldehyde-removing air conditioner filter element according to claim 1, wherein the cross-plugged thin plate is an aluminum plate, a stainless steel plate or a plastic plate, and the size of the holes is equal to or smaller than the size of the pore channels.
10. A wall-flow honeycomb air conditioner filter element according to claim 1, wherein the substance adhering to the perforated plate and the honeycomb filter material is an organic adhesive, and the organic adhesive is an acrylic emulsion adhesive.
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| CN114100669A (en) * | 2021-11-25 | 2022-03-01 | 青岛华世洁环保科技有限公司 | Pretreatment agent for silicon-containing VOCs (volatile organic compounds), and preparation method and application thereof |
| CN114100669B (en) * | 2021-11-25 | 2024-03-08 | 青岛华世洁环保科技有限公司 | Pretreatment agent for silicon-containing VOCs, and preparation method and application thereof |
| CN118341173A (en) * | 2024-06-17 | 2024-07-16 | 江苏奥凯环境技术有限公司 | Filter bag with welding agent material and preparation method thereof |
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