CN113041789A - Formaldehyde removing device - Google Patents
Formaldehyde removing device Download PDFInfo
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- CN113041789A CN113041789A CN202110265606.8A CN202110265606A CN113041789A CN 113041789 A CN113041789 A CN 113041789A CN 202110265606 A CN202110265606 A CN 202110265606A CN 113041789 A CN113041789 A CN 113041789A
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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
- B01D53/24—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 centrifugal force
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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
- B01D53/04—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 with stationary adsorbents
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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
- B01D53/14—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 absorption
- B01D53/1431—Pretreatment by other processes
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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
- B01D53/14—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 absorption
- B01D53/1487—Removing organic compounds
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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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/347—Use of yeasts or fungi
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
- C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
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- 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
- C02F2101/34—Organic compounds containing oxygen
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses a formaldehyde removal device, relates to the field of gas purification, and aims to provide a biological formaldehyde removal device. The device comprises a shell, an activated carbon layer, a fog and water condensation net, a filter layer, an air inlet device, a circulating device and a stirring device; the air containing formaldehyde is pumped by the air pump to be dissolved with the water vapor sprayed by the atomizing nozzle, and the water vapor is condensed by the mist water condensation net and then enters the area before purification, and the air is filtered by the filter layer, and the purified air is discharged after being treated by the active carbon layer. The invention adopts a combination mode of biological treatment and physical adsorption to effectively remove formaldehyde. The invention is applied to the field of formaldehyde removal.
Description
Technical Field
The invention relates to the field of gas purification, in particular to a formaldehyde removing device.
Background
The formaldehyde release of indoor building and finishing materials is a long-term slow process, and the existing indoor formaldehyde removal mainly adopts carbon adsorption, photocatalyst, negative ions, plant absorption, biological removal and other modes. Most of the treatment methods can be applied to the air purifier. But the existing purifier removal mode adopts multiple treatments to combine together to remove formaldehyde, and has high cost and the like. Some prior arts disclose a process for removing formaldehyde by dissolving formaldehyde in water, but in such a method, a formaldehyde-containing gas is directly introduced into water to be dissolved, so that the formaldehyde dissolution rate is low, and the formaldehyde removal rate is limited. Therefore, a biological formaldehyde removal method is needed to achieve long-term indoor formaldehyde removal.
Disclosure of Invention
The invention aims to provide a biological formaldehyde removal device.
The invention relates to a formaldehyde removing device, which comprises a shell, an activated carbon layer, a fog and water condensation net, a filter layer, an air inlet device, a circulating device and a stirring device, wherein the activated carbon layer is arranged on the shell;
the top end of the shell is provided with an air outlet, an activated carbon layer, a fog condensation water net and a filter layer are sequentially arranged in the shell from top to bottom, a purification front area is arranged between the filter layer and the fog condensation water net, a purification rear area is arranged below the filter layer, and water bodies are arranged in the purification front area and the purification rear area;
the air inlet device comprises an air inlet pipe, an air suction pump and a cyclone, wherein one end part of the air inlet pipe is arranged in the front purification area and communicated with the cyclone, and the other end of the air inlet pipe is communicated with the air suction pump;
the circulating device comprises a circulating water pipe, a circulating water pump and an atomizing spray head, wherein one end part of the circulating water pipe is arranged in the front purification area and communicated with the atomizing spray head, the other end of the circulating water pipe is communicated with the rear purification area, and the circulating water pipe is provided with the circulating water pump;
the cyclone is arranged opposite to the outlet of the atomizing nozzle and is positioned above the water body;
the two stirring devices are oppositely arranged in the water body in the area before purification, the stirring shafts of the stirring devices are parallel to the filter layer, and the stirring shafts of the stirring devices are connected with the motor shaft of the motor;
the cyclone is internally provided with a spinning disk and a cone part, the cone part is arranged in the middle of the cyclone and is connected with the inner wall of the cyclone through the spinning disk, and the distance between the cone part and the inner wall of the cyclone between the air inlet and the air outlet of the cyclone is gradually increased; the water body in the front purification area contains suspended fillers, and the suspended fillers are prepared from 20-50 parts by weight of aminated activated carbon and 3-6 parts by weight of formaldehyde degrading bacteria.
Furthermore, the surface of the fog condensation water net is provided with a super-hydrophobic coating.
Furthermore, the volume ratio of the gas sprayed by the cyclone to the water mist sprayed by the atomizing nozzle is 1 (5-10).
Further, the stirring device is intermittently started.
Further, the aminated activated carbon is prepared by the following steps:
adding sawdust into a mixed solution of zinc chloride and potassium chloride, soaking for 3-6 hours, and stirring once every 15-30 min during soaking; after dipping, placing the mixture in a reaction kettle, heating the mixture to 400-700 ℃ for activation for 1-3 h, cooling the mixture to room temperature, placing the mixture in a mixed solution of zinc chloride and potassium chloride for dipping for 1-5 h, applying 1MPa pressure to an activated product during dipping, placing the mixture in the reaction kettle for activation for 0.5-1.5 h after dipping, cooling the mixture to room temperature, performing acid washing and water washing until the pH of the solution is neutral, drying the solution to obtain activated carbon, placing the activated carbon in a toluene solution containing vinyltrimethoxysilane and 2-aminopyridine, stirring the solution uniformly under the protection of nitrogen, heating and refluxing the solution, filtering, washing and drying the solution to obtain the aminated activated carbon;
wherein the mass percentage of zinc chloride in the mixed solution of zinc chloride and potassium chloride is 30-50%, and the mass percentage of potassium chloride is 10-15%; in the toluene solution containing vinyltrimethoxysilane and 2-aminopyridine, the mass percent of the 2-aminopyridine toluene solution is 20-30%, and the mass percent of the vinyltrimethoxysilane toluene solution is 8-10%.
Further, the formaldehyde degrading microbial inoculum is a methylotrophic microbial inoculum, a pseudomonas agent, a bacillus agent, an aspergillus flavus microbial inoculum or a yeast agent.
Further, the pseudomonas is pseudomonas IOFA1 which is obtained from China center for type culture Collection with the preservation number of CCTCC NO: m2010280; the Aspergillus flavus is Aspergillus flavus H4; the yeast is flocculation yeast SPSC01, which is obtained from China general microbiological culture Collection center of China Committee for culture Collection of microorganisms with the preservation number of CGMCC 0587.
Further, the preparation method of the suspended filler comprises the following steps:
mixing 3-6 parts by weight of formaldehyde degrading microbial inoculum and 20-50 parts by weight of aminated activated carbon, and culturing at the constant temperature of 24-29 ℃ for 35-40 hours to obtain a suspended filler; the thallus activity of the formaldehyde degrading microbial inoculum in the suspended filler is 106-1010cfu/g。
Further, the activated carbon in the activated carbon layer is prepared according to the following modes:
cleaning shell particles, soaking the shell particles in a potassium permanganate solution with the mass concentration of 0.7%, stirring and mixing for 10-15 min, airing the shell particles at room temperature for 24-48 h, performing vacuum drying, soaking the shell particles in disodium ethylene diamine tetraacetate with the mass concentration of 4%, stirring and mixing for 10-15 min, airing the shell particles at room temperature for 24-48 h, and performing vacuum drying to obtain the activated carbon, wherein the activated carbon in the activated carbon layer (2) is prepared according to the following method:
cleaning shell particles, soaking the shell particles in a potassium permanganate solution with the mass concentration of 0.7%, stirring and mixing for 10-15 min, airing at room temperature for 24-48 h, performing vacuum drying, soaking the shell particles in disodium ethylene diamine tetraacetate with the mass concentration of 4%, stirring and mixing for 10-15 min, airing at room temperature for 24-48 h, and performing vacuum drying to obtain the activated carbon.
Furthermore, the filter layer is composed of one or more of a ceramsite filter material, coral bones, volcanic rocks, activated carbon and microbial fiber rings, and a formaldehyde degradation biological membrane is hung on the filter layer.
Further, the bacteria for degrading the formaldehyde biomembrane are one or more of pseudomonas, bacillus, methylotrophic bacteria and yeast.
The invention has the following beneficial effects:
the invention pressurizes the indoor air through the air pump, so that the air rapidly passes through the cyclone, and the air is shunted through the cyclone and released in pressure, so that the air rapidly enters the area in front of purification. And pressurizing the water in the purified area by a circulating water pump, circulating the water to the area before purification, and instantly releasing pressure by using an atomizing nozzle to form water mist. The water mist contacts with the multiple air flows, so that the contact area of the water mist and the multiple air flows is increased, the mixing of formaldehyde in the air and the water body is improved, the water mist after the formaldehyde is mixed with the mist water condensation net can be condensed and dripped into the water body again, and the content of the formaldehyde dissolved in the water body is increased by the method. And the gas which is not dissolved in the water body is discharged through the fog and water condensation net and the activated carbon layer in sequence.
The invention arranges the filler made of amino active carbon containing biological activity in the water body, the filler is used as a first formaldehyde degrading echelon, the formaldehyde dissolved in the water body is degraded firstly, the filler is fully and uniformly mixed in the water body by intermittently starting a stirring device, the formaldehyde in the water body is degraded by using degrading bacteria growing on the active carbon, the amino on the surface of the adopted amino active carbon can also react with the formaldehyde to remove the formaldehyde, and the adsorption effect of the active carbon can play a certain role of gathering the formaldehyde, thereby providing more formaldehyde degrading treatment for the formaldehyde degrading bacteria. The second formaldehyde degrading echelon is a formaldehyde degrading biomembrane in the filter layer, and the adopted ceramsite filter material and the like provide space for the formaldehyde degrading biomembrane, when the water body passes through the filter layer, the biomembrane can further degrade residual formaldehyde, and the residual formaldehyde is combined with the introduced formaldehyde-containing air again in a spraying mode through the lower-layer water body without formaldehyde to carry out a new degradation. The water body of the invention can also be added with corresponding culture solution according to the added formaldehyde degrading bacteria so as to improve the degradation time of the formaldehyde degrading bacteria.
The active carbon layer arranged at the gas outlet has the function of adsorbing formaldehyde, and also has the function of further reacting with the adsorbed formaldehyde to remove the formaldehyde. After the activated carbon in the activated carbon layer is prepared by the method, the loaded potassium permanganate can perform oxidation reaction with formaldehyde. And carrying out nucleophilic addition reaction with disodium ethylene diamine tetraacetate to achieve harmless treatment. The method can further improve the treatment capacity of the formaldehyde and ensure that the discharged gas has no formaldehyde residue as much as possible. The formaldehyde removal rate of the invention can reach about 97%.
Drawings
FIG. 1 is a schematic structural view of a formaldehyde removing apparatus according to the present invention;
FIG. 2 is a schematic view of the cyclone of the present invention.
Detailed Description
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
To make the objects, aspects and advantages of the embodiments of the present invention more apparent, the following detailed description clearly illustrates the spirit of the disclosure, and any person skilled in the art, after understanding the embodiments of the disclosure, may make changes and modifications to the technology taught by the disclosure without departing from the spirit and scope of the disclosure.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention.
Examples
Specifically referring to fig. 1 to 2, the formaldehyde treatment device of the present embodiment includes a housing 1, an activated carbon layer 2, a mist water condensation net 3, a filter layer 4, an air inlet device, a circulation device, and a stirring device 7;
the top end of the shell 1 is provided with an air outlet 1-1, an activated carbon layer 2, a fog and water condensation net 3 and a filter layer 4 are sequentially arranged in the shell 1 from top to bottom, a pre-purification area 1-2 is arranged between the filter layer 4 and the fog and water condensation net 3, a post-purification area 1-3 is arranged below the filter layer 4, and water bodies are arranged in the pre-purification area 1-2 and the post-purification area 1-3;
the air inlet device comprises an air inlet pipe 5-1, an air suction pump 5-2 and a cyclone 5-3, wherein one end part of the air inlet pipe 5-1 is arranged in the purification front area 1-2 and communicated with the cyclone 5-3, and the other end of the air inlet pipe 5-1 is communicated with the air suction pump 5-2;
the circulating device comprises a circulating water pipe 6-1, a circulating water pump 6-2 and an atomizing spray head 6-3, wherein one end part of the circulating water pipe 6-1 is arranged in the pre-purification area 1-2 and communicated with the atomizing spray head 6-3, the other end of the circulating water pipe 6-1 is communicated with the post-purification area 1-3, and the circulating water pump 6-2 is arranged on the circulating water pipe 6-1;
the cyclone 5-3 is arranged opposite to the outlet of the atomizing nozzle 6-3 and is positioned above the water body;
the two stirring devices 7 are oppositely arranged in the water body of the area 1-2 before purification, the stirring shafts of the stirring devices 7 are parallel to the filter layer 4, and the stirring shafts of the stirring devices 7 are connected with the motor shaft of the motor;
the cyclone 5-3 is internally provided with a spinning disk 5-3-1 and a cone part 5-3-2, the cone part 5-3-2 is arranged in the middle of the cyclone 5-3 and is connected with the inner wall of the cyclone 5-3 through the spinning disk 5-3-1, and the distance between the cone part 5-3-2 and the inner wall of the cyclone 5-3 between the air inlet and the air outlet of the cyclone 5-3 is gradually increased; the water body in the area 1-2 before purification contains suspended fillers, and the suspended fillers are prepared from 20-50 parts by weight of aminated activated carbon and 3-6 parts by weight of formaldehyde degrading bacteria agent.
The formaldehyde degrading microbial inoculum is aspergillus flavus H4. The activity of the thallus in the suspension filler is 108About cfu/g.
The stirring device 7 is intermittently started according to actual conditions.
The activated carbon in the activated carbon layer is prepared according to the following modes:
cleaning the shell particles, soaking the shell particles in a potassium permanganate solution with the mass concentration of 0.7%, stirring and mixing for 15min, airing at room temperature for 48h, then carrying out vacuum drying, soaking the shell particles in disodium ethylenediamine tetraacetate with the mass concentration of 4%, stirring and mixing for 15min, airing at room temperature for 48h, and then carrying out vacuum drying to obtain the activated carbon.
The filter layer 4 is composed of a ceramsite filter material, coral bones, volcanic rocks, active carbon and microbial fiber rings, and is hung with a formaldehyde degrading biomembrane, and the formaldehyde degrading microbes are flocculating yeast SPSC 01.
The aminated activated carbon is prepared by the following steps:
adding sawdust into a mixed solution of zinc chloride and potassium chloride, and soaking for 5h while stirring once every 15 min; after dipping, placing the mixture in a reaction kettle, heating the mixture to 500 ℃ for activation for 2h, cooling the mixture to room temperature, placing the mixture in a mixed solution of zinc chloride and potassium chloride again for dipping for 3h, applying 1MPa pressure to an activated product during dipping, placing the mixture in the reaction kettle for activation for 1h after dipping, cooling the mixture to room temperature, performing acid washing and water washing until the pH value of the solution is neutral, drying the solution to obtain activated carbon, then placing the activated carbon in a toluene solution containing vinyltrimethoxysilane and 2-aminopyridine, stirring the solution uniformly under the protection of nitrogen, heating and refluxing the solution, and filtering, washing and drying the solution to obtain aminated activated carbon;
wherein the mass percent of zinc chloride in the mixed solution of zinc chloride and potassium chloride is 40%, and the mass percent of potassium chloride is 15%; in the toluene solution containing vinyltrimethoxysilane and 2-aminopyridine, the mass percent of the toluene solution of the 2-aminopyridine is 20 percent, and the mass percent of the toluene solution of the vinyltrimethoxysilane is 10 percent.
The formaldehyde removal test was performed using the apparatus of this example:
firstly, for measuring accuracy, ensuring that no water exists in the area 1-2 before purification, and injecting water into the area 1-3 after purification according to the volume ratio of the gas sprayed by the cyclone 5-3 to the water mist sprayed by the atomizing spray head 6-3 being 1: 8;
then air containing formaldehyde is pumped in by an air pump 5-2 of the air inlet device, and a circulating water pump 6-2 is started to spray; ensuring that the volume ratio of the gas sprayed by the cyclone 5-3 to the water mist sprayed by the atomizing spray head 6-3 is 1:8, stopping introducing the formaldehyde gas after the purified area 1-3 has no water, closing the circulating water pump 6-2, and measuring that the formaldehyde content in the water in the area 1-2 before purification is 3.7mg/L and the formaldehyde dissolution rate is 89.2 percent; the formaldehyde content in the purified water bodies in the areas 1 to 3 is 0.39mg/L after treatment; by measuring the gas at the gas port 1-1, the formaldehyde removal rate can reach 97.1 percent through calculation.
Claims (10)
1. A formaldehyde removal device is characterized by comprising a shell (1), an activated carbon layer (2), a fog water condensation net (3), a filter layer (4), an air inlet device, a circulating device and a stirring device (7);
the top end of the shell (1) is provided with an air outlet (1-1), an activated carbon layer (2), a fog condensation water net (3) and a filter layer (4) are sequentially arranged in the shell (1) from top to bottom, a purification front area (1-2) is arranged between the filter layer (4) and the fog condensation water net (3), a purification rear area (1-3) is arranged below the filter layer (4), and water bodies are arranged in the purification front area (1-2) and the purification rear area (1-3);
the air inlet device comprises an air inlet pipe (5-1), an air suction pump (5-2) and a cyclone (5-3), wherein one end part of the air inlet pipe (5-1) is arranged in the purification front area (1-2) and communicated with the cyclone (5-3), and the other end of the air inlet pipe (5-1) is communicated with the air suction pump (5-2);
the circulating device comprises a circulating water pipe (6-1), a circulating water pump (6-2) and an atomizing spray head (6-3), one end of the circulating water pipe (6-1) is arranged in the region (1-2) before purification and communicated with the atomizing spray head (6-3), the other end of the circulating water pipe (6-1) is communicated with the region (1-3) after purification, and the circulating water pipe (6-1) is provided with the circulating water pump (6-2);
the cyclone (5-3) and the outlet of the atomizing nozzle (6-3) are arranged oppositely and positioned above the water body;
the two stirring devices (7) are oppositely arranged in the water body of the area (1-2) before purification, the stirring shafts of the stirring devices (7) are parallel to the filter layer (4), and the stirring shafts of the stirring devices (7) are connected with the motor shaft of the motor;
the cyclone separator (5-3) is internally provided with a cyclone sheet (5-3-1) and a cone part (5-3-2), the cone part (5-3-2) is arranged in the middle of the cyclone separator (5-3) and is connected with the inner wall of the cyclone separator (5-3) through the cyclone sheet (5-3-1), and the distance between the cone part (5-3-2) and the inner wall of the cyclone separator (5-3) between the air inlet and the air outlet of the cyclone separator (5-3) is gradually increased; the water body in the area (1-2) before purification contains suspended fillers, and the suspended fillers are prepared from 20-50 parts by weight of aminated activated carbon and 3-6 parts by weight of formaldehyde degrading bacteria agent.
2. A formaldehyde removing device according to claim 1, characterized in that the surface of said fog water condensation net (3) is provided with a super-hydrophobic coating.
3. The formaldehyde removing device according to claim 1, wherein the volume ratio of the gas sprayed from the cyclone (5-3) to the water mist sprayed from the atomizing nozzle (6-3) is 1 (5-10).
4. The formaldehyde removal device of claim 1, wherein the aminated activated carbon is prepared by:
adding sawdust into a mixed solution of zinc chloride and potassium chloride, soaking for 3-6 hours, and stirring once every 15-30 min during soaking; after dipping, placing the mixture in a reaction kettle, heating the mixture to 400-700 ℃ for activation for 1-3 h, cooling the mixture to room temperature, placing the mixture in a mixed solution of zinc chloride and potassium chloride for dipping for 1-5 h, applying 1MPa pressure to an activated product during dipping, placing the mixture in the reaction kettle for activation for 0.5-1.5 h after dipping, cooling the mixture to room temperature, performing acid washing and water washing until the pH of the solution is neutral, drying the solution to obtain activated carbon, placing the activated carbon in a toluene solution containing vinyltrimethoxysilane and 2-aminopyridine, stirring the solution uniformly under the protection of nitrogen, heating and refluxing the solution, filtering, washing and drying the solution to obtain the aminated activated carbon;
wherein the mass percentage of zinc chloride in the mixed solution of zinc chloride and potassium chloride is 30-50%, and the mass percentage of potassium chloride is 10-15%; the mass percentage of the 2-aminopyridine toluene solution in the toluene solution containing the vinyltrimethoxysilane and the 2-aminopyridine is 20-30%, and the mass percentage of the vinyltrimethoxysilane toluene solution is 8-10%.
5. The formaldehyde removing device according to claim 1, wherein the formaldehyde degrading microbial inoculum is a methylotrophic microbial inoculum, a pseudomonas agent, a bacillus agent, an aspergillus flavus microbial inoculum or a yeast agent.
6. The formaldehyde removing device according to claim 5, wherein the Pseudomonas is Pseudomonas IOFA1, obtained from China center for type culture Collection with the collection number of CCTCC NO: m2010280; the Aspergillus flavus is Aspergillus flavus H4; the yeast is flocculation yeast SPSC01, which is obtained from China general microbiological culture Collection center of China Committee for culture Collection of microorganisms with the preservation number of CGMCC 0587.
7. The formaldehyde removing device according to claim 1, wherein the suspended filler is prepared by the following steps:
mixing 3-6 parts by weight of formaldehyde degrading microbial inoculum and 20-50 parts by weight of aminated activated carbon, and culturing at the constant temperature of 24-29 ℃ for 35-40 hours to obtain a suspended filler; the thallus activity of the formaldehyde degrading microbial inoculum in the suspended filler is 106-1010cfu/g。
8. The formaldehyde removing device according to claim 1, wherein the activated carbon in the activated carbon layer (2) is prepared by:
cleaning shell particles, soaking the shell particles in a potassium permanganate solution with the mass concentration of 0.7%, stirring and mixing for 10-15 min, airing at room temperature for 24-48 h, performing vacuum drying, soaking the shell particles in disodium ethylene diamine tetraacetate with the mass concentration of 4%, stirring and mixing for 10-15 min, airing at room temperature for 24-48 h, and performing vacuum drying to obtain the activated carbon.
9. The formaldehyde removing device as claimed in claim 1, wherein the filter layer (4) is composed of one or more of ceramsite filter material, coral bone, volcanic rock, activated carbon and microbial fiber ring, and is hung with a formaldehyde degrading biomembrane.
10. The formaldehyde removal device of claim 9, wherein the bacteria that degrade the formaldehyde biofilm are one or more of pseudomonas, bacillus, methylotrophic bacteria, and yeast.
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| CN115322905A (en) * | 2022-08-02 | 2022-11-11 | 贵州德莱易生物科技有限公司 | Formaldehyde degradation strain breeding method, immobilized microorganism filler and air purifier |
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