CN116642264A - Indoor air pollutant cooperative purification equipment and use method - Google Patents
Indoor air pollutant cooperative purification equipment and use method Download PDFInfo
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- CN116642264A CN116642264A CN202310607365.XA CN202310607365A CN116642264A CN 116642264 A CN116642264 A CN 116642264A CN 202310607365 A CN202310607365 A CN 202310607365A CN 116642264 A CN116642264 A CN 116642264A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/24—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using sterilising media
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses indoor air pollutant collaborative purification equipment and a using method thereof, wherein a modularized integrated mode is adopted, and gaseous micromolecular pollutants such as microorganisms, fine particles, volatile organic pollutants and the like are efficiently and synergistically degraded through novel catalytic materials, and residual oxidizing gas can be effectively digested through a novel decomposition catalyst, so that secondary pollution is not caused; each module of the indoor air pollutant cooperative purification equipment can be replaced independently according to the use requirement, so that the treatment efficiency is improved, and meanwhile, the running cost is saved; the starting quantity and the running mode of the equipment modules can be accurately controlled in real time on line through a central control system according to the measurement result of the in-situ detector, so that the processing requirements of different pollution sources are met. The invention can effectively improve indoor air quality, inhibit the transmission of viruses and harmful atmospheric pollutants, and maintain human health, and has important economic and social values.
Description
Technical Field
The invention relates to the technical field of air pollution control equipment, in particular to indoor air pollutant cooperative purification equipment and a use method thereof.
Background
The time of working, learning and living of urban residents in the room every day accounts for about 70-90% of the total day time. How to effectively improve indoor air quality, maintain human health and realize indoor air pollution cooperative efficient treatment is a common problem facing global environmental sanitation.
The indoor air pollution mainly comes from two aspects, namely, an outdoor air pollution source such as traffic waste gas, dust emission, photochemical pollution and the like, and an indoor air pollution source generated by decoration, kitchen, coal heating, human metabolism and the like. Compared with outdoor air pollution, indoor air pollutants are various in variety and more complex in composition. Dust main component PM 2.5 Besides directly affecting the ventilation function of the lung and the conjunctiva of the eye, a large number of pathogenic bacteria and allergens can be carried, which seriously threatens the health of human bodies. Volatile organic compounds generated by decoration, kitchen cooking and coal heating have toxicity, irritation and carcinogenicity, and high concentration enrichment can seriously damage human health and induce serious diseases such as leukemia, nasopharyngeal carcinoma, liver/lung cancer and the like. Ozone has replaced PM in recent years 2.5 Become the primary air pollutant, and not only directly cause human nerve, respiratory and cardiovascular diseases, but also age indoor electronic equipment, rubber parts and the like, thereby causing economic loss. In summary, the indoor air quality has become one of the most critical factors affecting human health, and how to efficiently and cooperatively control the propagation and diffusion of composite atmospheric pollutants under the room temperature condition is a critical difficulty to be solved in indoor air purification.
Aiming at the indoor air pollutant types, the existing indoor air pollutant treatment method mainly comprises a physical adsorption method and a catalytic oxidation method.
The physical adsorption method mainly utilizes active carbon, a filter screen and other materials to physically remove pollutants in the air. Guo Mingchi et al (publication No. CN 201949916U) disclose a composite air purifying apparatusAdsorption of NH by activated carbon material 3 After the gases such as VOCs and the like, the dust and the NO which cannot be adsorbed by the active carbon adsorption layer are further removed through the electrostatic dust removal component 2 And (3) waiting for gas. Shen Huaming et al (publication No. CN 218645714U) discloses an air cleaning apparatus capable of adsorbing particulate matters, wherein dust particles in air are filtered by a filter screen, and the dust particles on the filter screen are scraped off by balls on a turntable scraper after the filtration. The two devices can effectively remove pollutants through a physical adsorption method, and the removal rate of the pollutants such as TVOC, formaldehyde and the like can reach more than 90%. However, the physical adsorption method only carries out layer phase transfer and enrichment on gaseous pollutants, and the materials can reach a saturated state after being used for a period of time, so that the adsorption materials are required to be replaced periodically, and the use and maintenance cost is greatly increased.
The catalytic oxidation method can generate a large amount of active oxygen such as OH, ozone and the like through a catalyst, and thoroughly mineralize gaseous pollutants into H through chemical reactions such as bond breaking, ring opening and the like 2 O、CO 2 And green small molecules are generated, so that the aim of purifying air is fulfilled. Catalytic oxidation processes can be classified into noble metal catalysts and transition metal catalysts, depending on the type of catalyst. Guo Jinchang et al (publication No. CN 107961675A) disclose an air purifying device, wherein a noble metal supported titanium dioxide catalyst attached to sodium-free glass is irradiated by infrared light to generate photocatalytic reaction, so that active oxygen with extremely high oxidizing capacity is produced, indoor air is rapidly purified, and the degradation rate of formaldehyde can reach more than 92%. However, noble metals are costly, equipment is not suitable for mass production, and the equipment does not treat residual ozone, which is prone to secondary pollution. Xie Jian (publication No. CN 215571061U) discloses a novel air purifying device, which can rapidly decompose gaseous pollutants in air through the synergistic effect of ozone catalysis and ultraviolet, and has a degradation effect on organic pollutants of more than 85% under a drying condition. Meanwhile, the apparatus decomposes residual ozone using a manganese-based catalyst. However, manganese-based catalysts are prone to deactivation at high humidity and ozone conversion is only 24.7% at relative humidity of 40% -80%. Therefore, how to economically and environmentally control the concentration of the residual oxidant is the indoor space while efficiently degrading the gaseous pollutants One of the difficulties to be solved in gas treatment.
In summary, the physical adsorption method only carries out layer phase transfer on the gaseous pollutants, the gaseous pollutants are not thoroughly removed, and the adsorbent needs to be replaced periodically after the adsorption is saturated, so that the use cost is increased. The catalytic oxidation method can effectively remove harmful components such as bacteria, volatile organic particulate matters and the like, but the existing equipment can not effectively digest residual ozone, and secondary pollution is easy to cause.
Disclosure of Invention
The invention provides indoor air pollutant cooperative purification equipment and a use method thereof, which aim to overcome the technical problems.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the indoor air pollutant collaborative purification equipment comprises an equipment frame body, a central control system, a first equipment processing unit, a second equipment processing unit and a third equipment processing unit, wherein the first equipment processing unit, the second equipment processing unit and the third equipment processing unit are arranged in the equipment frame body, and a silencing layer is arranged on the inner wall of the equipment frame body;
the first equipment processing unit, the second equipment processing unit and the third equipment processing unit are sequentially connected through a main pipeline; and the two ends of the main pipeline respectively penetrate through an air inlet and an air outlet of the equipment frame; the central control system is respectively connected with the display unit, the first equipment processing unit, the second equipment processing unit and the third equipment processing unit;
The first equipment processing unit is used for filtering dust particles in the indoor air acquired through the air inlet;
the second equipment treatment unit comprises a gaseous organic matter digestion module and an oxidant digestion module, wherein the gaseous organic matter digestion module is used for degrading volatile organic matters in the air; the oxidant digestion module is used for decomposing oxidizing gas in the air;
the third equipment treatment unit is used for treating residual pollutants of the gas in the main pipeline; and performing humidity adjustment on the gas in the main pipeline;
the display unit is used for displaying the gas information acquired by the central control system, wherein the gas information comprises gas components, the concentration of the gas components, the gas humidity and the gas temperature.
Further, the first equipment processing unit comprises an air inlet grid, a fan, a first controller, a second controller, a gas flowmeter and a filtering module;
the filtering module comprises a primary filter screen and a high-screen filter screen; the primary filter screen is formed by combining one or more materials of PET, a metal wire mesh and a nylon mesh; the high-screen filter screen is made of polypropylene material;
the air inlet grid, the fan, the gas flowmeter and the filtering module are sequentially connected to the main pipeline; the output end of the first controller is electrically connected with the fan, and the input end of the first controller is electrically connected with the central control system;
The output end of the second controller is electrically connected with the gas flowmeter, and the input end of the second controller is electrically connected with the central control system.
Further, the second equipment processing unit comprises a first online monitoring system, a gaseous organic matter digestion module, a first oxidant digestion module, a second oxidant digestion module and a third controller;
a third electromagnetic valve, a first online monitoring system and a second online monitoring system are arranged on a main pipeline in the second equipment processing unit, and a first branch pipeline and a second branch pipeline are symmetrically arranged on two sides of the main pipeline; the input ends of the first branch pipeline and the second branch pipeline are connected to a main pipeline between the third electromagnetic valve and the first online monitoring system; the output ends of the first branch pipeline and the second branch pipeline are connected to a main pipeline between the third electromagnetic valve and the second online monitoring system;
the first branch pipeline is sequentially provided with a first electromagnetic valve, a gaseous organic matter digestion module, a first oxidant digestion module and a fourth electromagnetic valve; the second branch pipeline is sequentially provided with a second electromagnetic valve, a second oxidant digestion module and a fifth electromagnetic valve;
The central control system is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve, the first online monitoring system and the second online monitoring system respectively, the input end of the third controller is electrically connected with the central control system, and the output end of the third controller is connected with the gaseous organic matter digestion module.
Further, the third equipment processing unit comprises a seventh electromagnetic valve, an adsorption module, a third online monitoring system, a humidity regulator and a fourth controller which are sequentially connected to the main pipeline;
a third branch pipeline is arranged on the main pipeline between the seventh electromagnetic valve and the second online monitoring system, a sixth electromagnetic valve, a third oxidant digestion module and an eighth electromagnetic valve are sequentially arranged on the third branch pipeline, and the output end of the third branch pipeline is connected with the adsorption module;
the central control system is electrically connected with the sixth electromagnetic valve, the seventh electromagnetic valve, the eighth electromagnetic valve and the third online monitoring system respectively; the input end of the fourth controller is electrically connected with the central control system, and the output end of the fourth controller is connected with the humidity regulator.
Further, the gaseous organic matter digestion module is provided with an active radical plasma generator and a digestion catalytic assembly, and the digestion catalytic assembly is provided with a gaseous organic matter digestion catalyst for degrading volatile organic matters.
Further, the preparation method of the gaseous organic matter digestion catalyst specifically comprises the following steps: preparing a molecular sieve matrix: dissolving sodium metaaluminate and sodium hydroxide, adding polyvinylpyrrolidone, mixing and stirring until the solution is clear; dropwise adding tetraethoxysilane, heating and stirring, adding tetrapropylammonium hydroxide, and obtaining a molecular sieve matrix after pyrolysis, centrifugation, washing, drying and calcination;
active component loading: heating the metal salt solution to 80-120 ℃, putting the metal salt solution into the molecular sieve matrix, stirring for 2-4 hours, centrifuging to recover solid, and washing, drying and calcining to obtain an active molecular sieve precursor;
dissolving active metal salt in deionized water to prepare impregnating solution; adding an active molecular sieve precursor into the impregnating solution for impregnating treatment, filtering, drying, roasting and grinding to obtain load type molecular sieve powder;
the active metal salt comprises one or more of molybdenum nitrate, molybdenum sulfate, molybdenum chloride, barium nitrate, barium sulfate and barium chloride;
And (3) hydrophobic treatment: dissolving tetraethoxysilane and a silane coupling agent in ethanol, stirring, adjusting the pH value to 2-4, adding the loaded molecular sieve powder after stirring, adjusting the pH value to 9-11 after stirring, continuing stirring, standing to form gel, sealing the gel, and performing aging treatment to obtain aged gel; soaking the aged gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours in sequence, displacing ethanol in the aged gel, and then drying to obtain a pretreated molecular sieve matrix;
and (3) forming a catalytic degradation component: the method comprises the steps of (1) mixing a molecular sieve matrix loaded with active metal, silica sol, an organic pore-forming agent and deionized water according to a ratio of 1:0.01-0.1: 0.05 to 0.20: mixing 5-80 mass percent into coating liquid, and coating the coating liquid on the pretreated molecular sieve matrix to form a gaseous organic matter digestion catalyst;
the organic pore-forming agent comprises one or more of methyl methacrylate, polyvinyl chloride, polystyrene, polyvinyl alcohol, urea and carbon powder.
Further, the oxidant digestion module comprises a dehydration component and an oxidation catalytic component, wherein the oxidation catalytic component is provided with an oxidative free radical decomposition catalyst.
Further, the preparation method of the oxidative free radical decomposition catalyst specifically comprises the following steps:
preparing a metal frame material precursor: selecting a transition metal salt solution and a stable ligand with a high dissociation equilibrium constant, and preparing a metal frame precursor by adopting a hydrothermal synthesis method; the transition metal salt comprises any one or more of ferric nitrate, cobalt nitrate and nickel nitrate;
the stabilizing ligand comprises any one or more of trimesic acid, dihydroxyterephthalic acid, cyclohexanedicarboxylic acid and benzimidazole pentacarboxylic acid; mixing metal salt and ligand according to the mol ratio of (0.2-5.0) to obtain solution A, adding one or more solvents B including water, ethanol, methanol and dimethylformamide, wherein the mass ratio of the mixture A to the solvent B is 1 (3-8); crystallizing for 10-24 hours at 50-130 ℃, washing and drying a transition recovered solid product, and calcining for 1-3 hours at 350 ℃ to obtain a powdery metal frame material precursor;
active component loading: mixing a metal organic frame material precursor, an active metal salt precursor and an aqueous solution according to the mass ratio of (0.5-2) to (3-10), dripping a precipitator and a potassium permanganate solution, and aging for 2-12 hours; filtering, washing, drying and calcining the mixed solution after ageing to obtain an active metal frame material precursor;
The active metal framework material precursor comprises one or a mixture of more than one of iron, zinc and zirconium oxide, and the precipitant comprises one or a mixture of more than one of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate; the adding amount of the precipitant is 2-4 times of the sum of the mol numbers of the active metal precursors;
and (3) hydrophobic treatment: dissolving silanization reagent in ethanol, stirring and regulating pH value to 1-3. Adding an active metal organic framework material precursor after stirring, adjusting the pH value to 9-11, and standing to form gel after stirring; sequentially soaking the gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours to replace ethanol in the aged gel, and then drying to obtain a catalyst for oxidative gas decomposition;
the silylating agent comprises one or a mixture of more of N, O-bis (trimethylsilyl) acetamide, dimethyl dichlorosilane, trimethylchlorosilane and trimethylsilyl diethylamine.
And (3) forming a catalytic degradation component: deionized water, a binder and a hydrophobic-treated active metal organic framework catalytic material are mixed according to a ratio of 1:0.002-0.01: mixing the materials in a mass ratio of 0.1-0.3 to form a coating liquid, and coating the coating liquid on honeycomb ceramics and honeycomb metal carriers to form an oxidative free radical decomposition catalyst;
The adhesive comprises one or more of silica sol, aluminum sol, polyurethane emulsion, acrylic resin emulsion, organopolysiloxane emulsion, organosiloxane-acrylate emulsion and polydimethylsiloxane emulsion; the addition amount of the binder is 5-40% of the weight of the solid matters in the catalyst active component slurry.
The application method of the indoor air pollutant cooperative purification equipment comprises the following steps:
step S1: starting a first controller to open a fan through a central control system, conveying gas to be treated to a filtering module through an air inlet grid for gas filtering, and controlling a gas flowmeter to regulate gas flow through a second controller by the central control system;
detecting the gas components and the concentration filtered by the filtering module through a first online monitoring system; the gas component comprises volatile organic compounds, ozone and PM 2.5 Bacteria and feeding back the detection result to the central control system in real time;
step S2: comparing the concentration of the volatile organic compounds detected by the first online monitoring system with a preset concentration threshold value of the volatile organic compounds;
if the detected concentration of the volatile organic compounds is greater than a preset concentration threshold value of the volatile organic compounds, executing a step S3;
If the detected concentration of the volatile organic compounds is less than or equal to a preset concentration threshold value of the volatile organic compounds, comparing the detected concentration of the ozone with the preset concentration threshold value of the ozone;
if the detected ozone concentration is greater than a preset ozone concentration threshold, executing step S4;
if the detected ozone concentration is less than or equal to a preset ozone concentration threshold, executing step S5;
step S3: the central control system controls the opening of the first electromagnetic valve and the fourth electromagnetic valve, the gas filtered by the filtering module is conveyed to the gaseous organic matter digestion module of the first branch pipeline, and the living organism is opened through the third controllerThe plasma generator of the sex free radical ionizes and dissociates the gas into active oxygen group, and destroy the surface protein structure of microorganism or virus in the gas; conversion of volatile organics in gases to CO by catalytic assembly 2 Molecules and H 2 An O molecule;
delivering the gas treated by the catalytic component to a first oxidant digestion module, and reducing the active oxygen groups to O through an oxidative free radical decomposition catalyst 2 Molecules and N 2 The molecules are used for converging the gas processed by the first oxidant digestion module into a main pipeline;
step S4: the central control system controls the opening of the second electromagnetic valve and the fifth electromagnetic valve, the gas filtered by the filtering module is conveyed to the second oxidant digestion module of the second branch pipeline, the water vapor in the gas is removed through the dehydration component of the second oxidant digestion module, and ozone molecules are reduced into O through the oxidative free radical decomposition catalyst 2 Molecules, which then merge into the main line;
step S5: the third electromagnetic valve is controlled to be opened through the central control system, and the gas to be treated is conveyed to the third treatment unit along the main pipeline;
step S6, detecting the concentration of the oxidizing gas in the gas output in the step S3 or the step S4 or the step S5 through a second online monitoring system, and feeding back the detection result to the central control system in real time; comparing the concentration of the oxidizing gas detected by the second online monitoring system with a preset oxidizing gas concentration threshold;
if the detected concentration of the oxidizing gas is greater than a preset oxidizing gas concentration threshold, a sixth electromagnetic valve is controlled to be opened by a central control system, and the gas is conveyed to a third oxidizing agent digestion module of a third branch pipeline; removing residual oxidizing gas in a third branch pipeline through the catalytic degradation reaction of the third oxidant digestion module, and then controlling and starting an eighth electromagnetic valve through a central control system to convey the gas to the adsorption module; otherwise, executing the step S7;
step S7: the seventh electromagnetic valve is controlled to be opened through the central control system, and gas is directly conveyed to the adsorption module;
step S8: detecting the relative humidity of the gas adsorbed by the adsorption module through a third online monitoring system, and feeding back the detection result to the central control system in real time; the central control system starts the humidity regulator through the fourth controller according to the relative humidity of the gas, regulates the relative humidity of the gas outlet to be a preset relative humidity threshold value, and discharges the gas regulated by the humidity regulator through the gas outlet of the main pipeline.
The beneficial effects are that: the invention discloses indoor air pollutant collaborative purification equipment and a using method thereof, which adopt a modularized integrated mode, efficiently and synergistically degrade gaseous micromolecular pollutants such as microorganisms, fine particles, volatile organic pollutants and the like through novel catalytic materials, and can effectively digest residual oxidizing gas through novel decomposition catalysts without causing secondary pollution. In addition, each module of the equipment can be independently replaced according to the use requirement, so that the processing efficiency is improved, and meanwhile, the running cost is saved. The starting quantity and the running mode of the equipment modules can be accurately controlled in real time on line through a central control system according to the measurement result of the in-situ detector, so that the processing requirements of different pollution sources are met. The invention can effectively improve indoor air quality, inhibit the transmission of viruses and harmful atmospheric pollutants, and maintain human health, and has important economic and social values.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of an indoor air pollutant co-purification device according to the present invention;
FIG. 2 is a graph showing the change in ozone concentration at the outlet of examples 1, 2, and 3 in this example;
fig. 3 is a graph showing changes in indoor air humidity in examples 1, 2, and 3 according to the present embodiment;
FIG. 4 is a graph of the gas chromatograms of toluene before and after treatment in this example;
FIG. 5 is a schematic diagram of the toluene degradation mechanism in this example;
FIG. 6 is a graph of formaldehyde gas chromatography before and after treatment in this example;
fig. 7 is a flow chart of a method of using the indoor air pollutant co-purification device of the present invention.
In the figure: 100. an equipment frame; 101. a first device processing unit; 1. an air inlet grid; 2. a blower; 31. a first controller; 32. a second controller; 33. a third controller; 34. a fourth controller; 4. a gas flow meter; 5. a filtration module; 51. a primary filter screen; 52. a high-screen filter screen; 102. a second device processing unit; 61. a first on-line monitoring system; 62. a second on-line monitoring system; 63. a third on-line monitoring system; 71. a first electromagnetic valve; 72. a second electromagnetic valve; 73. a third electromagnetic valve; 74. a fourth electromagnetic valve; 75. a fifth electromagnetic valve; 76. a sixth electromagnetic valve; 77. a seventh electromagnetic valve; 78. an eighth electromagnetic valve; 8. a gaseous organic matter digestion module; 81. a reactive radical plasma generator; 82. digestion catalytic assembly; 9. an oxidant digestion module; 91. a first oxidant digestion module; 92. a second oxidant digestion module; 93. a third oxidant digestion module; 901. a dewatering assembly; 902. an oxidation catalyst assembly 103, a second device processing unit; 104. a main pipeline; 1041. a first branch line; 1042. a second branch line; 1043. a third branch line; 10. a central control system; 11. an adsorption module; 12. a humidity regulator; 13. a sound deadening layer; 14. and a display screen.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment provides indoor air pollutant co-purification equipment, as shown in fig. 1, which comprises an equipment frame 100, a central control system 10, a first equipment processing unit 101, a second equipment processing unit 102 and a third equipment processing unit 103 which are arranged inside the equipment frame 100, wherein a silencing layer 13 is arranged on the inner wall of the equipment frame 100; the silencing layer 13 consists of a series of pipelines and silencers, and sound waves generated by the system are reflected inwards through a refraction plate in the pipelines, so that the energy of the sound waves is weakened, and noise generated in the running process of equipment is reduced;
the device frame 100 is provided with an air inlet and an air outlet, and the first device processing unit 101, the second device processing unit 102 and the third device processing unit 103 are sequentially connected through a main pipeline 104; and two ends of the main pipeline 104 respectively penetrate through an air inlet and an air outlet of the equipment frame 100; the central control system 10 is connected to a display unit 14, the first device processing unit 101, the second device processing unit 102, and a third device processing unit 103, respectively;
The first equipment processing unit 101 is used for filtering dust particles in indoor air acquired through the air inlet;
the second equipment treatment unit 102 comprises a gaseous organic matter digestion module 8 and an oxidant digestion module 9, wherein the gaseous organic matter digestion module 8 is used for degrading volatile organic matters in the air; the oxidant digestion module 9 is used for decomposing oxidizing gas in the air;
the third equipment treatment unit 103 is used for treating residual pollutants of the gas in the main pipeline 104; and humidity adjusting the gas in the main pipeline 104;
the display unit 14 is configured to display gas information acquired by the central control system 10, where the gas information includes a gas component, a concentration of the gas component, a gas humidity, and a gas temperature.
The invention adopts a modularized integrated mode, and the start and stop of each purification module are automatically controlled by the central control system 10. The treatment equipment is provided with a filtering die from the gas air inlet to the air outletThe blocks "-" gaseous organic matter digestion module 8 "-" oxidant digestion module 9 "-" adsorption module 11 "-" humidity control module 12 "are five kinds of processing modules, and each processing module can be independently replaced according to the use requirement, so that the use cost is saved. The overall size of the apparatus housing 100 is 0.5x0.3x1m 3 The gas treatment capacity is 100-500m 3 And/h, the treatment area is 20-100m 2 The treatment time is 8-10 min, the equipment noise is less than 30dB, and the treated gas reaches the relevant regulations of the indoor air quality standard (GB 18883-2022) in China. The equipment adopts a central control system to realize full-automatic control, and can flexibly regulate and control the operation modes of each module according to the air inflow, the pollutant concentration and the humidity, thereby remarkably prolonging the service life of the equipment.
The modularized integrated mode is adopted, and the novel catalytic material is used for efficiently and cooperatively degrading gaseous micromolecular pollutants such as microorganisms, fine particles, volatile organic pollutants and the like, and can be used for effectively resolving residual oxidizing gas through the novel decomposition catalyst, so that secondary pollution is not caused. In addition, each module of the equipment can be independently replaced according to the use requirement, so that the processing efficiency is improved, and meanwhile, the running cost is saved. The starting quantity and the running mode of the equipment modules can be accurately controlled in real time on line through a central control system according to the measurement result of the in-situ detector, so that the processing requirements of different pollution sources are met. The invention can effectively improve indoor air quality, inhibit the transmission of viruses and harmful atmospheric pollutants, and maintain human health, and has important economic and social values.
In a specific embodiment, the first device processing unit 101 includes an air intake grid 1, a fan 2, a first controller 31, a second controller 32, a gas flowmeter 4, and a filtering module 5; the filter module 5 comprises a primary filter screen 51 and a high-screen filter screen 52; the primary filter screen 51 is formed by combining one or more materials of PET, a wire mesh and a nylon mesh; the filter is used for filtering pollutants such as large particle dust in indoor air, and can be washed and cleaned; the Gao Shai filter screen 52 is made of polypropylene material, and is used for filtering residual virus, bacteria, aerosol and PM in the air inlet 2.5 The removal rate of the fine particles to 0.3 mu m particles can reach more than 98 percent; the air inlet grid 1, the fan 2 and the airThe body flowmeter 4 and the filter module 5 are sequentially connected to the main pipeline 104; the output end of the first controller 31 is electrically connected with the fan 2, and the input end of the first controller 31 is electrically connected with the central control system 10; the output end of the second controller 32 is electrically connected with the gas flowmeter 4, and the input end of the second controller 32 is electrically connected with the central control system 10. The central control system 10 can control the fan 2 and the gas flowmeter 4 of the system through the first controller 31 and the second controller 32, and control the opening and closing of all electromagnetic valves. According to the temperature, humidity, pollutant concentration and the like of the gas components in the main pipeline, the concentration and injection quantity of active oxygen in the gaseous organic matter digestion module 8 are automatically adjusted, and automatic control of the whole treatment equipment in the operation process is realized.
In a specific embodiment, the second device processing unit 102 includes a first online monitoring system 61, a gaseous organic matter digestion module 8, a first oxidant digestion module 91, a second oxidant digestion module 92, and a third controller 33;
a third electromagnetic valve 73, a first online monitoring system 61 and a second online monitoring system 62 are arranged on a main pipeline 104 in the second equipment processing unit 102, and a first branch pipeline 1041 and a second branch pipeline 1042 are symmetrically arranged on two sides of the main pipeline 104; the input ends of the first branch pipeline 1041 and the second branch pipeline 1042 are connected to the main pipeline 104 between the third electromagnetic valve 73 and the first on-line monitoring system 61; the output ends of the first branch pipe 1041 and the second branch pipe 1042 are connected to the main pipe 104 between the third electromagnetic valve 73 and the second on-line monitoring system 62;
the first branch pipe 1041 is sequentially provided with a first electromagnetic valve 71, a gaseous organic matter digestion module 8, a first oxidant digestion module 91 and a fourth electromagnetic valve 74; the second branch pipe 1042 is provided with a second electromagnetic valve 72, a second oxidant digestion module 92 and a fifth electromagnetic valve 75 in sequence;
the central control system 10 is electrically connected with the first electromagnetic valve 71, the second electromagnetic valve 72, the third electromagnetic valve 73, the fourth electromagnetic valve 74, the fifth electromagnetic valve 75, the first online monitoring system 61 and the second online monitoring system 62 respectively, the input end of the third controller 33 is electrically connected with the central control system 10, and the output end of the third controller 33 is connected with the gaseous organic matter digestion module 8.
In a specific embodiment, the third device processing unit 103 includes a seventh electromagnetic valve 77, an adsorption module 11, a third on-line monitoring system 63, a humidity regulator 12, and a fourth controller 34, which are sequentially connected to the main pipeline 104;
a third branch pipeline 1043 is arranged on the main pipeline 104 between the seventh electromagnetic valve 77 and the second on-line monitoring system 62, the third branch pipeline 1043 is sequentially provided with a sixth electromagnetic valve 76, a third oxidant digestion module 93 and an eighth electromagnetic valve 78, and the output end of the third branch pipeline 1043 is connected with the adsorption module 11;
the central control system 10 is electrically connected with a sixth electromagnetic valve 76, a seventh electromagnetic valve 77, an eighth electromagnetic valve 78 and a third online monitoring system 63 respectively; the input end of the fourth controller 34 is electrically connected with the central control system 10, and the output end of the fourth controller 34 is connected with the humidity regulator 12.
In a specific embodiment, the gaseous organic matter digestion module 8 is composed of an active radical plasma generator 81, a high-frequency high-voltage power supply, a cooling circulation system and a digestion catalysis assembly 82, and is used for degrading volatile organic matters. The concentration of active free radicals generated by the plasma integrated source is regulated and controlled by a central control system according to the parameters of the pollutant of the air inlet component. The concentration of the prepared total oxidative free radical is 1-5 mg/L, and the output is more than 10m 3 And/h, the automatic control operation can be realized, and the power of the whole machine is less than 5kW. Waste heat generated by the plasma integrated source may be used to catalyze the regeneration of active components in the degradation assembly.
The digestion catalytic assembly 82 is comprised of a series of catalytic plates, the number of plates being selectable based on the gas throughput. The pollutant digestion catalytic component adopts a molecular sieve to load active metal sites, and the catalyst pair O is improved through abundant surface oxygen vacancies and proper pore canal structures 3 And adsorption and desorption properties and electron transfer properties of VOCs, and enhances catalyst hydrophobicity by silylation treatmentThe mineralization rate of the synergetic active free radicals on the VOC reaches 100% under the room temperature condition. The gaseous organic matter digestion module 8 is provided with an active radical plasma generator 81 and a digestion catalytic assembly 82, and the digestion catalytic assembly 82 is provided with a gaseous organic matter digestion catalyst for degrading volatile organic matters;
the preparation method of the gaseous organic matter digestion catalyst specifically comprises the following steps: preparing a molecular sieve matrix: dissolving sodium metaaluminate and sodium hydroxide, adding polyvinylpyrrolidone, mixing and stirring until the solution is clear; dropwise adding tetraethoxysilane, heating and stirring, adding tetrapropylammonium hydroxide, and obtaining a molecular sieve matrix after pyrolysis, centrifugation, washing, drying and calcination;
Active component loading: heating the metal salt solution to 80-120 ℃, putting the metal salt solution into the molecular sieve matrix, stirring for 2-4 hours, centrifuging to recover solid, and washing, drying and calcining to obtain an active molecular sieve precursor;
dissolving active metal salt in deionized water to prepare impregnating solution; adding an active molecular sieve precursor into the impregnating solution for impregnating treatment, filtering, drying, roasting and grinding to obtain load type molecular sieve powder;
the active metal salt comprises one or more of molybdenum nitrate, molybdenum sulfate, molybdenum chloride, barium nitrate, barium sulfate and barium chloride;
and (3) hydrophobic treatment: dissolving tetraethoxysilane and a silane coupling agent in ethanol, stirring, adjusting the pH value to 2-4, adding the loaded molecular sieve powder after stirring, adjusting the pH value to 9-11 after stirring, continuing stirring, standing to form gel, sealing the gel, and performing aging treatment to obtain aged gel; soaking the aged gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours in sequence, displacing ethanol in the aged gel, and then drying to obtain a pretreated molecular sieve matrix;
and (3) forming a catalytic degradation component: the method comprises the steps of (1) mixing a molecular sieve matrix loaded with active metal, silica sol, an organic pore-forming agent and deionized water according to a ratio of 1:0.01-0.1: 0.05 to 0.20: mixing 5-80 mass percent into coating liquid, and coating the coating liquid on the pretreated molecular sieve matrix to form a gaseous organic matter digestion catalyst;
The organic pore-forming agent comprises one or more of methyl methacrylate, polyvinyl chloride, polystyrene, polyvinyl alcohol, urea and carbon powder.
In a specific embodiment, the oxidant digestion module 9 includes a dehydration component 901 and an oxidation catalytic component 902, the oxidation catalytic component 902 is composed of a series of catalytic plates, an oxidative free radical decomposition catalyst is arranged on the catalytic plates, and the number of the catalytic plates which are opened can be adjusted according to the gas treatment capacity; the oxidative free radical decomposition catalyst takes a metal organic framework material containing abundant hydroxyl groups as a precursor, and realizes the efficient decomposition of oxidative gas under the room temperature condition by doping active metal to promote the circulation performance of oxidative free radicals and catalytic surface states, and the preparation method of the oxidative free radical decomposition catalyst specifically comprises the following steps:
preparing a metal frame material precursor: selecting a transition metal salt solution and a stable ligand with a high dissociation equilibrium constant, and preparing a metal frame precursor by adopting a hydrothermal synthesis method; the transition metal salt comprises any one or more of ferric nitrate, cobalt nitrate and nickel nitrate;
the stabilizing ligand comprises any one or more of trimesic acid, dihydroxyterephthalic acid, cyclohexanedicarboxylic acid and benzimidazole pentacarboxylic acid; mixing metal salt and ligand according to the mol ratio of (0.2-5.0) to obtain solution A, adding one or more solvents B including water, ethanol, methanol and dimethylformamide, wherein the mass ratio of the mixture A to the solvent B is 1 (3-8); crystallizing for 10-24 hours at 50-130 ℃, washing and drying a transition recovered solid product, and calcining for 1-3 hours at 350 ℃ to obtain a powdery metal frame material precursor;
Active component loading: mixing a metal organic frame material precursor, an active metal salt precursor and an aqueous solution according to the mass ratio of (0.5-2) to (3-10), dripping a precipitator and a potassium permanganate solution, and aging for 2-12 hours; filtering, washing, drying and calcining the mixed solution after ageing to obtain an active metal frame material precursor;
the active metal framework material precursor comprises one or a mixture of more than one of iron, zinc and zirconium oxide, and the precipitant comprises one or a mixture of more than one of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate; the adding amount of the precipitant is 2-4 times of the sum of the mol numbers of the active metal precursors;
and (3) hydrophobic treatment: dissolving silanization reagent in ethanol, stirring and regulating pH value to 1-3. Adding an active metal organic framework material precursor after stirring, adjusting the pH value to 9-11, and standing to form gel after stirring; sequentially soaking the gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours to replace ethanol in the aged gel, and then drying to obtain a catalyst for oxidative gas decomposition;
the silylating agent comprises one or a mixture of more of N, O-bis (trimethylsilyl) acetamide, dimethyl dichlorosilane, trimethylchlorosilane and trimethylsilyl diethylamine.
And (3) forming a catalytic degradation component: deionized water, a binder and a hydrophobic-treated active metal organic framework catalytic material are mixed according to a ratio of 1:0.002-0.01: mixing the materials in a mass ratio of 0.1-0.3 to form a coating liquid, and coating the coating liquid on honeycomb ceramics and honeycomb metal carriers to form an oxidative free radical decomposition catalyst;
the adhesive comprises one or more of silica sol, aluminum sol, polyurethane emulsion, acrylic resin emulsion, organopolysiloxane emulsion, organosiloxane-acrylate emulsion and polydimethylsiloxane emulsion; the addition amount of the binder is 5-40% of the weight of the solid matters in the catalyst active component slurry.
The application method of the indoor air pollutant cooperative purification equipment is as shown in fig. 7, and comprises the following steps:
step S1: starting a first controller 31 to open a fan 2 through a central control system 10, conveying gas to be treated to a filtering module 5 through an air inlet grid 1 for gas filtering, and controlling a gas flowmeter 4 to regulate gas flow through a second controller 32 by the central control system 10; the primary filter screen 51 of the filter module 5 is 200-50PET, wire mesh or nylon mesh with 0 mesh filters pollutants such as large particle dust in indoor air through physical interception; the high-efficiency fine particle high-screen filter screen 52 is a 1500-2000 mesh polypropylene composite screen, can effectively filter microorganisms, viruses, fine particles and aerosols through screening effect, interception effect and diffusion effect, and has a particle removal rate of more than 98% for 0.3 mu m. Post-treatment gas PM through a filtration module 2.5 The concentration is less than 0.05mg/m 3 Bacteria concentration less than 1500CFU/m 3 ；
Detecting the gas components and the concentration filtered by the filtering module 5 through a first online monitoring system; the gas component comprises volatile organic compounds, ozone and PM 2.5 And bacteria, and feeding back the detection result to the central control system 10 in real time; the volatile organic compounds comprise toluene, formaldehyde and TVOC;
step S2: comparing the total concentration of the volatile organic compounds detected by the first online monitoring system with a preset volatile organic compound concentration threshold;
if the total concentration of the detected volatile organic compounds is greater than the preset concentration threshold value of the volatile organic compounds of 0.08mg/m 3 Step S3 is executed;
if the total concentration of the detected volatile organic compounds is less than or equal to a preset volatile organic compound concentration threshold value of 0.08mg/m 3 Comparing the detected ozone concentration with a preset ozone concentration threshold;
if the detected ozone concentration is greater than the preset ozone concentration threshold value of 0.16mg/m 3 Step S4 is executed;
if the detected ozone concentration is less than or equal to a preset ozone concentration threshold value of 0.16mg/m 3 Step S5 is executed;
step S3: the central control system 10 controls the opening of the first electromagnetic valve 71 and the fourth electromagnetic valve 74, and conveys the gas filtered by the filtering module 5 to the gaseous organic matter digestion module 8 of the first branch pipeline 1041, and the third controller 33 opens the active radical plasma generator 81 to ionize and dissociate the gas into active oxygen radicals and destroy micro-micro in the gas by using physical means of atmospheric pressure strong electric field discharge Biological or viral surface protein structures; conversion of volatile organics in gas to CO by catalytic assembly 82 2 Molecules and H 2 Green small molecules such as O molecules; the catalytic assembly comprises 3 catalytic plates, digestion catalysts are arranged on the catalytic plates, and the opening quantity of the catalytic plates can be adjusted according to the gas treatment capacity. The waste heat generated by the plasma generator can be used for regenerating and activating the catalytic component;
the filter module 5 can remove 95% of dust particles and 98% of microorganisms, viruses, fine particles and aerosols; the gas PM after being treated by the filtering module 5 2.5 The concentration is less than 0.05mg/m 3 Bacteria concentration less than 1500CFU/m 3 The method comprises the steps of carrying out a first treatment on the surface of the The filtering module 5 can be replaced independently according to the use condition; the air is ionized into high concentration active group with concentration of 1-5 mg/L by the electric field discharge of atmospheric pressure, and the output is more than 10m 3 And/h, the automatic control operation can be realized, and the power of the whole machine is less than 5kW. The catalytic component adopts a molecular sieve loaded p-type oxide and a strong oxygen storage active metal structure, and the catalyst pair O is improved through abundant surface oxygen vacancies and proper pore canal structures 3 And the adsorption and desorption performance and electron transfer performance of the VOC, and the hydrophobicity of the catalyst is enhanced through silanization treatment, the catalyst can keep higher activity under the condition of wide humidity (RH=10% -90%), and the mineralization rate of the synergistic active free radical on the VOC reaches 100% under the room temperature condition through a series of reaction processes of surface adsorption, electron transfer, desorption and the like, and the volatile organic matters such as toluene, formaldehyde and the like are efficiently mineralized. The catalytic assembly can selectively open 1-3 catalytic plates according to the flow of the treated gas, and the maximum treatment capacity is 500m 3 And/h, the treatment time is 1-2min. Toluene concentration after being treated by the pollutant digestion module is lower than 0.2mg/m 3 Formaldehyde concentration lower than 0.08mg/m 3 TVOC concentration less than 0.6mg/m 3 。
The gas treated by the catalytic assembly 82 is fed to a first oxidant digestion module 91 where the reactive oxygen species are reduced to O by an oxidative radical decomposition catalyst 2 Molecules and N 2 Molecules and other small molecules, and collecting the gas processed by the first oxidant digestion module 91 into a main pipeline 104;
step S4: the central control system 10 controlling the second electromagnetic valve 72 and the fifth electromagnetic valve 75 to be opened, conveying the gas filtered by the filtering module 5 to a second oxidant digestion module 92 of a second branch pipeline 1042, removing water vapor in the gas through a dehydration component of the second oxidant digestion module 92, and reducing ozone molecules into O through an oxidative free radical decomposition catalyst 2 Molecules, then, merge into main line 104;
step S5: the third electromagnetic valve 73 is controlled to be opened by the central control system 10, and the gas to be treated is conveyed to the main pipeline 100 of the third treatment unit 103 along the main pipeline 104;
step S6, detecting the concentration of the oxidizing gas in the gas output in the step S3 or the step S4 or the step S5 through the second online monitoring system 62, and feeding back the detection result to the central control system 10 in real time; comparing the concentration of the oxidizing gas detected by the second online monitoring system with a preset oxidizing gas concentration threshold;
If the detected concentration of the oxidizing gas is greater than the preset threshold value of the concentration of the oxidizing gas by 0.16mg/m 3 When the system is in operation, the central control system 10 controls the sixth electromagnetic valve 76 to open, and the gas is delivered to the third oxidant digestion module 93 of the third branch pipeline 1043; the third oxidizing agent digestion module 93 catalyzes the degradation reaction to remove the residual oxidizing gas in the third branch pipeline 1043, and then the central control system 10 controls the opening of the eighth electromagnetic valve 78 to convey the gas to the adsorption module 11; otherwise, executing the step S7;
wherein each oxidant digestion module O 3 The degradation rate reaches more than 90 percent, and the gas O is discharged 3 The concentration is lower than 0.16mg/m 3 The method can effectively avoid the damage of the subsequent treatment module by the strong oxidizing gas and eliminate the harm of the oxidizing gas to the human body. Ozone concentration after treatment by each oxidant digestion module is lower than 0.16mg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the And the catalytic assembly in the oxidant digestion module 9 can selectively open 1-3 catalytic plates according to the flow of the treated gas, and the maximum treatment capacity is 500m 3 And/h, the treatment time is 2-5min;
step S7: if the detected concentration of the oxidizing gas is less than or equal to the preset threshold value of the concentration of the oxidizing gas of 0.16mg/m 3 By central controlThe system 10 controls the seventh electromagnetic valve 77 to be opened to directly deliver the gas to the adsorption module 11; the adsorption module 11 is composed of an activated carbon adsorption component and a gas detector and is used for removing residual trace pollutants in a gas path. After the gas is physically adsorbed, sieved and filtered by the adsorption module 11, the residual fine particles and toxic components in the gas can be further filtered, and CO 2 The concentration is lower than 0.1%, and the outlet gas is ensured to be green and safe. Wherein, the activated carbon adsorption component comprises 2 layers of carbon layers, the filling amount is 50-200 g, and the number of the adsorption components can be increased or decreased according to the requirement. The discharged gas after being treated by the purifying equipment should meet the relevant regulations of the indoor air quality standard (GB 18883-2022) in China.
Step S8: detecting the relative humidity of the gas adsorbed by the adsorption module 11 through a third online monitoring system 63, and feeding back the detection result to the central control system 10 in real time; the central control system 10 starts the humidity regulator 12 through the fourth controller 34 according to the relative humidity of the gas, regulates the relative humidity of the gas outlet to a preset relative humidity threshold value, and discharges the gas regulated by the humidity regulator 12 through the air outlet of the main pipeline 104.
Example 1:
at a certain position containing bacteria and PM 2.5 50m of atmospheric pollutants such as toluene, ozone and the like 3 The equipment is used for purifying air in a room, so that the air pollutants are efficiently and cooperatively treated; and the indoor air temperature was 25 ℃.
The central control system starts the controller, the fan is opened, the gas to be treated is conveyed into the filtering module through the air inlet grid, the air inlet flow is regulated by starting the gas flowmeter through the first controller, and the air inlet flow is regulated to 400m 3 And/h. After being processed by the filtering module, the filtered gas is detected by a first on-line monitor to be formaldehyde, toluene, TVOC, ozone and PM 2.5 Concentration and total number of bacteria. The detection result is formaldehyde 0.05mg/m 3 Toluene 0.59mg/m 3 、TVOC 0.3mg/m 3 Ozone 0.2mg/m 3 、PM 2.5 0.04mg/m 3 Total number of bacteria 1059CFU/m 3 . Wherein, the concentrations of toluene and ozone are both more than the indoor air quality standard (G)B18883-2022), further purification treatment is required, and various indexes of the filtered gas are shown in table 1;
TABLE 1 variation of various indexes of gas before and after treatment in EXAMPLE 1
The filtered gas detection result is fed back to the central control system in real time, and the central control system is used for analyzing the module according to the built-in data, wherein the built-in data analysis module is the prior known technology and is not an application point of the application and is not repeated here; calculating that 4mg/L oxygen free radical is required to be output by the plasma of the digestion module, and the output quantity is 15m 3 And/h, the purification module needs to start three catalytic plates. The central control system starts an electromagnetic valve, gas to be treated is conveyed into the gaseous organic matter digestion module through a branch pipeline, the central control system starts a controller, a reactive radical plasma generator is started, the concentration of oxygen radicals is regulated and controlled to be 4mg/L, and simultaneously three catalytic plates of the gaseous organic matter digestion module are started to mineralize toluene and TVOC in the gas into CO 2 、H 2 The comparison chart of the green small molecules such as O and the like and the gas chromatography before and after toluene treatment is shown in figure 4.
Analysis of toluene degradation products by gas chromatography-tandem mass spectrometry revealed that OH mineralized toluene by two reaction pathways: 1) And (3) carrying out addition reaction. Under the action of active free radicals such as OH, the O-OH addition reaction is carried out on the methyl group on toluene at the ortho-position and the para-position, and the benzene ring intermediate product coupled polymer and benzoquinone are respectively generated. 2) And (3) hydrogen extraction substitution reaction. Toluene directly undergoes a hydrogen extraction substitution reaction under the action of active free radicals such as OH, O and the like, and a benzene ring intermediate product coupled polymer and benzaldehyde are generated. Under the strong oxidizing action of OH, the benzene ring is opened by the electron transfer action to generate a series of ring-opening products such as hydrocarbon, alcohols, aldehydes, carboxylic acid and the like, and finally mineralized into CO 2 、H 2 O and other small molecular green products, and the toluene degradation mechanism is shown in figure 5.
After being treated by the gaseous organic matter digestion module, the gas is conveyed into the first oxidant digestion module,and the central control system calculates that the first oxidant digestion module needs to start three catalytic plates according to the built-in data analysis module. Starting three catalytic plates of the first oxidant digestion module through a central control system, and reducing residual strong oxidative free radicals into O by using an oxidative free radical decomposition catalyst 2 、N 2 And (3) small molecules. Oxidizing gas is removed through catalytic degradation reaction, and then a fourth electromagnetic valve is opened to convey the gas into a main pipeline.
The concentration of the residual oxidizing gas after being treated by the first oxidizing agent digestion module is detected to be 0.7mg/m by a second line detector 3 Feeding back the detection result to a central control system in real time, opening a sixth electromagnetic valve through the central control system, conveying gas into a third neutralization module, further removing residual oxidative gas through catalytic degradation reaction, and then opening an eighth electromagnetic valve to convey gas into an adsorption module; the gas is subjected to physical adsorption, screening and filtering by an adsorption module, and then residual fine particles and toxic components in the gas are further filtered.
After the adsorption treatment by the post-adsorption module, detecting the concentration of each gas and the relative humidity of the gas after the treatment by the adsorption module by a third line detector, wherein the detection result is formaldehyde 0.01mg/m 3 Toluene 0.02mg/m 3 、TVOC 0mg/m 3 Ozone 0.07mg/m 3 、PM 2.5 0.02mg/m 3 Total bacteria count 785CFU/m 3 Humidity 15%, CO 2 0.08%.
The central control system starts the humidity regulator by controlling the fourth controller to regulate the relative humidity of the air outlet to 60%, as shown in figure 3, various indexes of the air reach the national indoor air quality standard (GB 18883-2022), then the treated air is discharged through the air outlet, and the running working noise of the measuring equipment is less than 25dB by the prior art means.
Example 2:
at a certain level containing PM 2.5 And 25m of atmospheric pollutants such as formaldehyde 3 The equipment is used for purifying air in a room, atmospheric pollutants are treated efficiently and cooperatively, and the indoor air temperature is 30 ℃.
Central control systemStarting a controller, opening a fan, conveying gas to be treated into a filtering module through an air inlet grid, starting a gas flowmeter to regulate the air inlet flow through the controller, and regulating the air inlet flow to be 200m 3 And/h. After being processed by the filtering module, the filtered gas is detected by an on-line monitor to be formaldehyde, toluene, TVOC, ozone and PM 2.5 Concentration and total number of bacteria. The detection result is formaldehyde 0.32mg/m 3 Toluene 0.06mg/m 3 、TVOC 0.54mg/m 3 Ozone 0.09mg/m 3 、PM 2.5 0.03mg/m 3 Total bacteria count 1178CFU/m 3 . Wherein, the formaldehyde concentration exceeds the indoor air quality standard (GB 18883-2022) in China, further purification treatment is needed, and various indexes of the filtered gas are shown in Table 2;
TABLE 2 variation of various indexes of gases before and after treatment in EXAMPLE 2
The filtered gas detection result is fed back to a central control system in real time, and the central control system calculates that 2mg/L oxygen free radical is required to be output by plasma of a digestion module according to a built-in data analysis module, wherein the output quantity is 7.5m 3 The method comprises the steps of (1) starting two catalytic plates of a gaseous organic matter digestion module, starting a first electromagnetic valve by a central control system, conveying gas to be treated into the gaseous organic matter digestion module through a first branch pipeline, starting a third controller by the central control system, starting an active free radical plasma generator, regulating and controlling the concentration of oxygen free radicals to be 2mg/L, and starting the two catalytic plates of the gaseous organic matter digestion module to mineralize formaldehyde, toluene and TVOC in the gas into CO 2 、H 2 The comparison chart of the green small molecules such as O and the like and the gas chromatography before and after formaldehyde treatment is shown in figure 6.
After being processed by the gaseous organic matter digestion module, the gas is conveyed into the first oxidant digestion module, and the central control system calculates that the oxidant digestion module needs to open three catalytic plates according to the built-in data analysis module. Three catalytic plates of an oxidant digestion module are started through a central control system, and the oxidant is utilized to perform self-oxidationReduction of residual strongly oxidative free radicals to O by a radical decomposition catalyst 2 、N 2 And (3) small molecules. Oxidizing gas is removed through catalytic degradation reaction, and then a fourth electromagnetic valve is opened to convey the gas into a main pipeline.
The concentration of the residual oxidizing gas after being treated by the first oxidizing agent digestion module is detected to be 0.4mg/m by a second online monitoring system 3 And feeding back the detection result to the central control system in real time. And opening a sixth electromagnetic valve through the central control system, conveying gas into the third oxidant digestion module, further removing residual oxidizing gas through catalytic degradation reaction, and then opening an eighth electromagnetic valve to convey gas into the adsorption module. The gas is subjected to physical adsorption, screening and filtering by an adsorption module, and then residual fine particles and toxic components in the gas are further filtered.
After adsorption treatment by the adsorption module, detecting the concentration and relative humidity of each gas after the treatment by a third online monitoring system, wherein the detection result is formaldehyde 0.02mg/m 3 Toluene 0.01mg/m 3 、TVOC 0mg/m 3 Ozone 0.04mg/m 3 、PM 2.5 0.01mg/m 3 Total number of bacteria 746CFU/m 3 Humidity 15%, CO 2 The content is 0.06%.
The humidity regulator is started by the controller to regulate the relative humidity of the air outlet to 60%, the humidity change is shown in figure 3, and various indexes of the air reach the national indoor air quality standard (GB 18883-2022). And then the treated gas is discharged through the air outlet, and the operating noise of the equipment is less than 25dB.
Example 3:
at 80m of certain atmospheric pollutants containing PM, bacteria, ozone and the like 3 The equipment is used for purifying air in a room, so that atmospheric pollutants are efficiently and cooperatively treated, and the indoor air temperature is 20 ℃.
The central control system starts the controller, the fan is opened, the gas to be treated is conveyed into the filtering module through the air inlet grid, the air inlet flow is regulated by starting the gas flowmeter through the controller, and the air inlet flow is regulated to be 500m 3 And/h. After being processed by the filtering module, the first online monitor detectsFormaldehyde, toluene, TVOC, ozone and PM in the filtered gas 2.5 Concentration and total number of bacteria. The detection result is formaldehyde 0.05mg/m 3 Toluene 0.1mg/m 3 、TVOC 0.2mg/m 3 Ozone 0.26mg/m 3 、PM 2.5 0.03mg/m 3 Total bacteria 1365CFU/m 3 . As shown in FIG. 2, the ozone concentration exceeds the indoor air quality standard (GB 18883-2022) in China, further purification treatment is needed, and various indexes of the filtered gas are shown in Table 3:
TABLE 3 variation of various indexes of gases before and after treatment in EXAMPLE 3
And feeding back the filtered gas detection result to a central control system in real time, and calculating that the first oxidant digestion module needs to start three catalytic plates according to the built-in data analysis module by the central control system. Starting three catalytic plates of the first oxidant digestion module through a central control system, and reducing and decomposing ozone molecules into O by utilizing an oxidative free radical decomposition catalyst 2 . Ozone molecules are removed through catalytic degradation reaction, then gas is conveyed into an adsorption module, and residual fine particles and toxic components in the gas are further filtered after the gas is subjected to physical adsorption, screening and filtering through the adsorption module.
After adsorption treatment by the adsorption module, detecting the concentration and relative humidity of each gas after the treatment by a third online monitoring system, wherein the detection result is formaldehyde 0.01mg/m 3 Toluene 0.01mg/m 3 、TVOC 0.18mg/m 3 Ozone 0.02mg/m 3 、PM 2.5 0.01mg/m 3 Total number of bacteria 761CFU/m 3 15% relative humidity, CO 2 The content was 0.07%, and the indexes of the treated gas are shown in Table 3.
The humidity adjusting module is started by the controller to adjust the relative humidity of the air outlet to 45%, and as shown in figure 3, each index of the air reaches the national indoor air quality standard (GB 18883-2022). And then the treated gas is discharged through the air outlet, and the operating noise of the equipment is less than 25dB.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The indoor air pollutant cooperative purification device is characterized by comprising a device frame body (100), a central control system (10), a first device processing unit (101), a second device processing unit (102) and a third device processing unit (103) which are arranged inside the device frame body (100), wherein a silencing layer (13) is arranged on the inner wall of the device frame body (100);
The equipment frame body (100) is provided with an air inlet and an air outlet, and the first equipment processing unit (101), the second equipment processing unit (102) and the third equipment processing unit (103) are sequentially connected through a main pipeline (104); and two ends of the main pipeline (104) respectively penetrate through an air inlet and an air outlet of the equipment frame body (100); the central control system (10) is respectively connected with a display unit (14), the first equipment processing unit (101), the second equipment processing unit (102) and the third equipment processing unit (103);
the first equipment processing unit (101) is used for filtering dust particles in indoor air acquired through the air inlet;
the second equipment treatment unit (102) comprises a gaseous organic matter digestion module (8) and an oxidant digestion module (9), wherein the gaseous organic matter digestion module (8) is used for degrading volatile organic matters in the air; the oxidant digestion module (9) is used for decomposing oxidizing gas in the air;
-said third plant treatment unit (103) is adapted to treat residual contaminants of the gas in said main line (104); and the humidity of the gas in the main pipeline (104) is regulated;
the display unit (14) is used for displaying gas information acquired by the central control system (10), wherein the gas information comprises gas components, concentration of the gas components, gas humidity and gas temperature.
2. An indoor air pollutant co-purification device according to claim 1, wherein the first device processing unit (101) comprises an air intake grid (1), a fan (2), a first controller (31), a second controller (32), a gas flow meter (4) and a filtration module (5);
the filtering module (5) comprises a primary filter screen (51) and a high-screen filter screen (52); the primary filter screen (51) is formed by combining one or more materials of PET, a wire mesh and a nylon mesh; the high-screen filter screen (52) is made of polypropylene material;
the air inlet grid (1), the fan (2), the gas flowmeter (4) and the filtering module (5) are sequentially connected to the main pipeline (104); the output end of the first controller (31) is electrically connected with the fan (2), and the input end of the first controller (31) is electrically connected with the central control system (10);
the output end of the second controller (32) is electrically connected with the gas flowmeter (4), and the input end of the second controller (32) is electrically connected with the central control system (10).
3. The indoor air pollutant co-purification device of claim 1, wherein the second device processing unit (102) comprises a first online monitoring system (61), a gaseous organic matter digestion module (8), a first oxidant digestion module (91), a second oxidant digestion module (92), and a third controller (33);
A third electromagnetic valve (73), a first online monitoring system (61) and a second online monitoring system (62) are arranged on a main pipeline (104) in the second equipment processing unit (102), and a first branch pipeline (1041) and a second branch pipeline (1042) are symmetrically arranged on two sides of the main pipeline (104); the input ends of the first branch pipeline (1041) and the second branch pipeline (1042) are connected to a main pipeline (104) between the third electromagnetic valve (73) and the first online monitoring system (61); the output ends of the first branch pipeline (1041) and the second branch pipeline (1042) are connected to a main pipeline (104) between the third electromagnetic valve (73) and the second online monitoring system (62);
a first electromagnetic valve (71), a gaseous organic matter digestion module (8), a first oxidant digestion module (91) and a fourth electromagnetic valve (74) are sequentially arranged on the first branch pipeline (1041); a second electromagnetic valve (72), a second oxidant digestion module (92) and a fifth electromagnetic valve (75) are sequentially arranged on the second branch pipeline (1042);
the central control system (10) is electrically connected with the first electromagnetic valve (71), the second electromagnetic valve (72), the third electromagnetic valve (73), the fourth electromagnetic valve (74), the fifth electromagnetic valve (75), the first online monitoring system (61) and the second online monitoring system (62) respectively, the input end of the third controller (33) is electrically connected with the central control system (10), and the output end of the third controller (33) is connected with the gaseous organic matter digestion module (8).
4. An indoor air pollutant co-purification apparatus according to claim 1, wherein the third apparatus processing unit (103) comprises a seventh solenoid valve (77), an adsorption module (11), a third on-line monitoring system (63), a hygrometer (12) and a fourth controller (34) connected in sequence on a main pipeline (104);
a third branch pipeline (1043) is arranged on a main pipeline (104) between the seventh electromagnetic valve (77) and the second online monitoring system (62), the third branch pipeline (1043) is sequentially provided with a sixth electromagnetic valve (76), a third oxidant digestion module (93) and an eighth electromagnetic valve (78), and the output end of the third branch pipeline (1043) is connected with the adsorption module (11);
the central control system (10) is electrically connected with a sixth electromagnetic valve (76), a seventh electromagnetic valve (77), an eighth electromagnetic valve (78) and a third online monitoring system (63) respectively; the input end of the fourth controller (34) is electrically connected with the central control system (10), and the output end of the fourth controller (34) is connected with the humidity regulator (12).
5. A co-purification apparatus for indoor air pollutants according to claim 3, characterized in that the gaseous organic matter digestion module (8) is provided with a reactive radical plasma generator (81) and a digestion catalytic assembly (82), the digestion catalytic assembly (82) being provided with a gaseous organic matter digestion catalyst for degradation of volatile organic matter.
6. The collaborative purification apparatus for indoor air pollutants according to claim 3, wherein the preparation method of the gaseous organic matter digestion catalyst comprises the following steps: preparing a molecular sieve matrix: dissolving sodium metaaluminate and sodium hydroxide, adding polyvinylpyrrolidone, mixing and stirring until the solution is clear; dropwise adding tetraethoxysilane, heating and stirring, adding tetrapropylammonium hydroxide, and obtaining a molecular sieve matrix after pyrolysis, centrifugation, washing, drying and calcination;
active component loading: heating the metal salt solution to 80-120 ℃, putting the metal salt solution into the molecular sieve matrix, stirring for 2-4 hours, centrifuging to recover solid, and washing, drying and calcining to obtain an active molecular sieve precursor;
dissolving active metal salt in deionized water to prepare impregnating solution; adding an active molecular sieve precursor into the impregnating solution for impregnating treatment, filtering, drying, roasting and grinding to obtain load type molecular sieve powder;
the active metal salt comprises one or more of molybdenum nitrate, molybdenum sulfate, molybdenum chloride, barium nitrate, barium sulfate and barium chloride;
and (3) hydrophobic treatment: dissolving tetraethoxysilane and a silane coupling agent in ethanol, stirring, adjusting the pH value to 2-4, adding the loaded molecular sieve powder after stirring, adjusting the pH value to 9-11 after stirring, continuing stirring, standing to form gel, sealing the gel, and performing aging treatment to obtain aged gel; soaking the aged gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours in sequence, displacing ethanol in the aged gel, and then drying to obtain a pretreated molecular sieve matrix;
And (3) forming a catalytic degradation component: the method comprises the steps of (1) mixing a molecular sieve matrix loaded with active metal, silica sol, an organic pore-forming agent and deionized water according to a ratio of 1:0.01-0.1: 0.05 to 0.20: mixing 5-80 mass percent into coating liquid, and coating the coating liquid on the pretreated molecular sieve matrix to form a gaseous organic matter digestion catalyst;
the organic pore-forming agent comprises one or more of methyl methacrylate, polyvinyl chloride, polystyrene, polyvinyl alcohol, urea and carbon powder.
7. An indoor air pollutant co-purification apparatus according to claim 1, characterized in that the oxidant digestion module (9) comprises a dehydration assembly (901) and an oxidation catalytic assembly (902), the oxidation catalytic assembly (902) being provided with an oxidative radical decomposition catalyst.
8. The collaborative purifying apparatus for indoor air pollutants according to claim 7, wherein the preparation method of the oxidative radical decomposition catalyst specifically comprises:
preparing a metal frame material precursor: selecting a transition metal salt solution and a stable ligand with a high dissociation equilibrium constant, and preparing a metal frame precursor by adopting a hydrothermal synthesis method; the transition metal salt comprises any one or more of ferric nitrate, cobalt nitrate and nickel nitrate;
The stabilizing ligand comprises any one or more of trimesic acid, dihydroxyterephthalic acid, cyclohexanedicarboxylic acid and benzimidazole pentacarboxylic acid; mixing metal salt and ligand according to the mol ratio of 1:0.2-5.0 to obtain solution A, adding one or more solvents B including water, ethanol, methanol and dimethylformamide, wherein the mass ratio of the mixture A to the solvent B is 1:3-8; crystallizing for 10-24 hours at 50-130 ℃, washing and drying a transition recovered solid product, and calcining for 1-3 hours at 350 ℃ to obtain a powdery metal frame material precursor;
active component loading: mixing a metal organic frame material precursor, an active metal salt precursor and an aqueous solution according to a mass ratio of 1:0.5-2:3-10, dripping a precipitator and a potassium permanganate solution, and aging for 2-12 hours; filtering, washing, drying and calcining the mixed solution after ageing to obtain an active metal frame material precursor;
the active metal framework material precursor comprises one or a mixture of more than one of iron, zinc and zirconium oxide, and the precipitant comprises one or a mixture of more than one of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate; the adding amount of the precipitant is 2-4 times of the sum of the mol numbers of the active metal precursors;
And (3) hydrophobic treatment: dissolving silanization reagent in ethanol, stirring and regulating pH value to 1-3. Adding an active metal organic framework material precursor after stirring, adjusting the pH value to 9-11, and standing to form gel after stirring; sequentially soaking the gel in n-hexane, trimethylchlorosilane and n-hexane for 12-24 hours to replace ethanol in the aged gel, and then drying to obtain a catalyst for oxidative gas decomposition;
the silylating agent comprises one or a mixture of more of N, O-bis (trimethylsilyl) acetamide, dimethyl dichlorosilane, trimethylchlorosilane and trimethylsilyl diethylamine.
And (3) forming a catalytic degradation component: deionized water, a binder and a hydrophobic-treated active metal organic framework catalytic material are mixed according to a ratio of 1:0.002-0.01: mixing the materials in a mass ratio of 0.1-0.3 to form a coating liquid, and coating the coating liquid on honeycomb ceramics and honeycomb metal carriers to form an oxidative free radical decomposition catalyst;
the adhesive comprises one or more of silica sol, aluminum sol, polyurethane emulsion, acrylic resin emulsion, organopolysiloxane emulsion, organosiloxane-acrylate emulsion and polydimethylsiloxane emulsion; the addition amount of the binder is 5-40% of the weight of the solid matters in the catalyst active component slurry.
9. A method of using an indoor air pollutant co-purification apparatus according to any one of claims 1 to 8, comprising the steps of:
step S1: starting a first controller (31) to open a fan (2) through a central control system (10), conveying gas to be treated to a filtering module (5) through an air inlet grid (1) for gas filtering, and controlling a gas flowmeter (4) by the central control system (10) through a second controller (32) for gas flow regulation;
detecting the gas components and the concentration filtered by the filtering module (5) through a first online monitoring system; the gas component comprises volatile organic compounds, ozone and PM 2.5 And bacteria, and feeding back the detection result to the central control system (10) in real time;
step S2: comparing the concentration of the volatile organic compounds detected by the first online monitoring system (61) with a preset concentration threshold value of the volatile organic compounds;
if the detected concentration of the volatile organic compounds is greater than a preset concentration threshold value of the volatile organic compounds, executing a step S3;
if the detected concentration of the volatile organic compounds is less than or equal to a preset concentration threshold value of the volatile organic compounds, comparing the detected concentration of the ozone with the preset concentration threshold value of the ozone;
If the detected ozone concentration is greater than a preset ozone concentration threshold, executing step S4;
if the detected ozone concentration is less than or equal to a preset ozone concentration threshold, executing step S5;
step S3: the central control system (10) controls the opening of the first electromagnetic valve (71) and the fourth electromagnetic valve (74), the gas filtered by the filtering module (5) is conveyed to the gaseous organic matter digestion module (8) of the first branch pipeline (1041), and the third controller (33) opens the active radical plasma generator (81) to ionize and dissociate the gas into active oxygen groups and destroy the protein structure on the surface of microorganisms or viruses in the gas; conversion of volatile organic compounds in a gas to CO by a catalytic assembly (82) 2 Molecules and H 2 An O molecule;
the gas treated by the catalytic component (82) is conveyed to a first oxidant digestion module (91) and the active oxygen groups are reduced to O by an oxidative free radical decomposition catalyst 2 Molecules and N 2 A molecule which oxidizes the firstThe gas processed by the agent digestion module (91) is converged into a main pipeline (104);
step S4: the central control system (10) controls the opening of the second electromagnetic valve (72) and the fifth electromagnetic valve (75), the gas filtered by the filtering module (5) is conveyed to the second oxidant digestion module (92) of the second branch pipeline (1042), the water vapor in the gas is removed through the dehydration component of the second oxidant digestion module (92), and then ozone molecules are reduced into O through the oxidative free radical decomposition catalyst 2 Molecules which then merge into the main line (104);
step S5: the central control system (10) controls the third electromagnetic valve (73) to be opened, and the gas to be treated is conveyed to the third treatment unit along the main pipeline (104);
step S6, detecting the concentration of the oxidizing gas in the gas output in the step S3 or the step S4 or the step S5 through a second online monitoring system (62), and feeding back the detection result to the central control system (10) in real time; comparing the concentration of the oxidizing gas detected by the second online monitoring system with a preset oxidizing gas concentration threshold;
if the detected concentration of the oxidizing gas is greater than a preset oxidizing gas concentration threshold, a sixth electromagnetic valve (76) is controlled to be opened by a central control system (10), and the gas is conveyed to a third oxidizing agent digestion module (93) of a third branch pipeline (1043); residual oxidizing gas in a third branch pipeline (1043) is removed through a catalytic degradation reaction of a third oxidant digestion module (93), and then a central control system (10) is used for controlling and opening an eighth electromagnetic valve (78) to convey the gas to an adsorption module (11); otherwise, executing the step S7;
step S7: the seventh electromagnetic valve (77) is controlled to be opened through the central control system (10) so as to directly convey the gas to the adsorption module (11);
Step S8: detecting the relative humidity of the gas adsorbed by the adsorption module (11) through a third online monitoring system (63), and feeding back the detection result to the central control system (10) in real time; the central control system (10) starts the humidity regulator (12) according to the relative humidity of the gas through the fourth controller (34), the relative humidity of the gas outlet is regulated to be a preset relative humidity threshold value, and the gas regulated by the humidity regulator (12) is discharged through the gas outlet of the main pipeline (104).
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