848 results about "Air decontamination" patented technology

The invention relates to a sensor control method of an air purification system. The pollutant concentration gradient is monitored in real time by combining initial distribution of the sensors, and a pollutant diffusion path is simulated by utilizing a fluid dynamic model; a pollutant source is reversely deduced through sensor data, and the acquisition range of the sensor is dynamically changed; the method comprises the following steps: acquiring multi-dimensional data through physical sensors including particulate matters, temperature and humidity and chemical sensors including VOC and harmful gas, and extracting pollutant characteristics by utilizing PCA (principal component analysis); constructing hazard indexes of pollutants including AQI grading standards, and dynamically evaluating the priority of the pollutants in combination with real-time monitoring data of a sensor; for pollutants with different priorities, resources of the air purification system are distributed, and the air volume of a filter, the adsorption strength of activated carbon and the turn-on time of an ultraviolet germicidal lamp are adjusted; a self-adaptive calibration algorithm is introduced, and sensor output including interference correction of temperature and humidity on the particulate matter sensor is adjusted in real time according to the environment reference value; and dynamically adjusting the maintenance and replacement period of the sensor.

The invention relates to a multi-dimensional air purification method and system based on AI intelligent big data deep analysis, and solves the problem that it is difficult for an air purifier to achieve uniform and efficient purification of the whole indoor space. According to the coordinates and the areas of the sub-regions contained in the target region cluster, the mass center position of the target region cluster is obtained through calculation and serves as the target position of the air purifier; a path planning algorithm is used for planning a moving path from the current position to the target position for the air purifier, and the air purifier is controlled to move according to the moving path; and the size, the pollutant concentration and the type of the polluted area of the area cluster are obtained and input into a preset air purifier purification parameter adjustment model, air purifier purification parameters are output, and purification parameter adjustment is conducted according to the air purifier purification parameters after the air purifier moves to the target position. The indoor air purification device has the following effect that the indoor air purification efficiency and quality are improved.

The invention discloses a laboratory air conditioning system and a control method thereof, and particularly relates to the technical field of air conditioning. Intelligent monitoring and dynamic adjustment of air quality in an experiment area are achieved through coordinated work of the central control module, the zone control module and the zone sensor module, the system evaluates the air pollution severity degree of each area in real time according to air quality sensing data, and through dynamic linkage of the air purification module, the air flow control module and the temperature and humidity adjusting module, the air quality of the experiment area can be monitored and adjusted dynamically. In addition, by predicting future air quality changes and adjusting air quality parameters and optimizing energy consumption in advance according to prediction results, it is ensured that energy consumption is reduced while the air quality meets experimental requirements, and the precision and efficiency of laboratory air quality management are remarkably improved.

The invention provides a photocatalysis and biological reaction mixed efficient air purification system, and relates to the technical field of biological air purification, the system comprises a photocatalysis reaction module, a biological reaction module, an intelligent control module, a sensor monitoring module, a data analysis and optimization module, and a modularization and self-maintenance module; the system is combined with a photocatalytic reaction module and a biological reaction module, a multi-stage degradation and efficient decomposition treatment mode is adopted, the photocatalytic reaction module firstly degrades pollutants in air into intermediate products, then the biological reaction module further degrades the intermediate products through microorganisms, and finally thorough purification is achieved. According to the multi-stage synergistic reaction, the air purification efficiency is remarkably improved, thorough removal of pollutants in the treatment process is ensured, the environmental risk is reduced, various indexes in the degradation process are dynamically adjusted through a multi-target optimization algorithm, it is ensured that each stage achieves the optimal effect, and the performance and stability of the whole system are further improved.

The invention relates to the technical field of green building ventilation regulation, in particular to an air purification method and device applied to a ventilation system, and the method comprises the steps that the content of all pollutants of air in a workplace, the indoor and outdoor pressure difference, air speed data near the purification device and power consumption data of all devices are obtained; the indoor and outdoor pressure difference and equipment power consumption data form two-dimensional data, all the two-dimensional data in each time period are clustered, the influence coefficient of air quality is determined through the local density and the relative distance of the two-dimensional data at each moment, and the change trend and the random change degree of each pollutant content are combined to determine the air quality influence coefficient. Determining the pollutant trend random variation of each time period; and determining an airflow disturbance coefficient according to the fluctuation degree and the average level of the wind speed data, analyzing the similarity between the airflow disturbance coefficient and the pollutant trend random variation, determining an air purification influence factor, and performing purification regulation and control. The air ventilation and purification efficiency can be improved, and occupational diseases caused by air pollution are prevented.

The invention relates to an air purification method and system fused with AI intelligent big data analysis, and solves the problem that the purification effect is greatly reduced due to the fact that an air purifier cannot adjust operation parameters in time according to upcoming air quality changes in the operation process. The method comprises the following steps: inputting real-time gas related data and gas related data in a historical past time range into a pre-trained air quality prediction model, and outputting an air quality prediction result in a future preset time range; and the mode set by the user about the air purifier and the air quality prediction result in the future preset time range are input into the air purifier operation parameter optimization model, the optimized air purifier operation parameters are output, and the air purifier is indicated to perform corresponding operation according to the optimized air purifier operation parameters. The intelligent air purifier has the following effects that precise and intelligent air purification is achieved, the indoor air quality is effectively improved, and various requirements are met.

The invention relates to the technical field of ward air purification systems, and discloses a ward air purification system which comprises an environment sensing module, a purification path planning module, a filter unit configuration module, a purification execution module, a dynamic adjustment module, a state monitoring module and a feedback control module. The environment sensing module obtains ward space information to construct an air flow topology; the purification path planning module calls air quality data to label the topology; the filter unit configuration module sets purification nodes and adjustment intervals; the purification execution module implements basic purification; the state monitoring module analyzes data to determine operation state characteristics, and the feedback control module generates monitoring records and performs visual feedback. The system can accurately perceive the air quality of the ward, scientifically plan the purification path, dynamically adjust the purification strategy, effectively improve the air quality of the ward and guarantee the health of patients and medical staff, and has high practical value.

The present invention discloses an air purifier, belonging to the technical field of ventilation devices. The air purifier comprises: a shell, an air inlet is provided at the lower end of the shell, an air inlet grid is provided on the air inlet, an air outlet is provided at the upper end of the shell, an air outlet grid is provided on the air outlet; a fan is provided in the shell; a lighting mechanism is provided at the lower end of the shell; a filter is provided in the shell; a disinfection mechanism is provided in the shell, and the disinfection mechanism is used to disinfect the air inside the shell. Dust and harmful substances will remain in the device after being purified by the air purifier. The disinfection mechanism automatically disinfects and sterilizes the internal space of the device after the air purification work is completed, which can replace the user to disassemble the device for manual disinfection. On the one hand, it reduces the user's operating burden, and on the other hand, it avoids the user from contacting with harmful substances, thereby ensuring the safety of the user.

The invention relates to the field of liquid air energy storage, and discloses a liquid air energy storage and liquefied natural gas coupling efficient power generation device and method. The method comprises the steps that an air liquefaction circulation loop purifies, compresses and cools ambient air and then expands and decompresses the ambient air to obtain liquid air, and the liquid air is transmitted to an air power generation circulation loop; generated air compression heat is stored in the heat storage unit; the air power generation circulation loop generates power through expansion of received liquid air, and generated cold energy is stored in a cold storage unit; the LNG vaporization supply loop pressurizes, evaporates and gasifies liquefied natural gas and then supplies the liquefied natural gas to a user side, generated cold energy is stored in a cold storage unit or directly supplied to the air liquefaction circulation loop, and meanwhile gaseous natural gas naturally released by an LNG tank is collected and conveyed to a combustion chamber. The high-grade heat energy utilization loop conducts heat conduction oil circulation, low-grade heat energy and high-grade natural gas combustion heat energy of the heat storage unit are recycled in sequence, high-grade heat energy is transmitted to the air power generation circulation loop, and heat conduction oil returns to the initial state to continue circulation after releasing the heat energy.

The invention relates to an intelligent multi-dimensional air purification cloud intelligent control method and system, and solves the problem that the complexity of an indoor environment, such as temperature and humidity, concentration of other pollutants and factors of different sensitivities of a user to air quality, cannot be comprehensively considered due to the fact that operation of a purifier is adjusted simply according to a single air quality index. The method comprises the following steps: analyzing a voice control instruction to extract key information, analyzing the extracted key information, real-time air quality data and air quality trend information in a future preset time range, inputting the information into an intelligent decision algorithm model of a cloud end, and outputting operating parameters needing to be adjusted of the air purifier, forming a parameter adjustment decision instruction; the formed parameter adjustment decision instruction is issued to an air purifier terminal through a network; and the air purifier responds to the parameter adjustment decision instruction to adjust the operation parameters of the air purifier. The method has the following effects that the air quality is improved, and the requirement of a user for the indoor air environment is met.

The invention discloses an ionic liquid modified polyimide nanofiber film and an air purification filter screen based on the ionic liquid modified polyimide nanofiber film, and belongs to the technical field of film filtering materials. The preparation method comprises the following steps: firstly, selecting a diamine monomer and a dianhydride monomer to carry out low-temperature polycondensation reaction, and then carrying out solvent replacement and freeze drying to obtain polyamide acid powder; dissolving the powder to obtain a polyamide acid spinning solution, preparing an ionic liquid / polyamide acid spinning solution on the basis, and carrying out electrostatic spinning to obtain an ionic liquid / polyamide acid nanofiber membrane; and finally, carrying out high-temperature thermal imidization treatment to prepare the ionic liquid / polyimide nanofiber membrane. The method is simple and efficient, the problems of low resistance, high pressure drop and the like of a traditional nanofiber film in air filtration are solved, development and application of the nanofiber film in the field of air filtration are further widened, and the nanofiber film has important scientific significance and application value in the fields of high-temperature filtration, gas adsorption and the like.

The invention provides an olfactory function evaluation method for human olfactory detection, and belongs to the technical field of olfactory detection based on machine learning. The method comprises the following steps: firstly, collecting representative odor substances covering different types, releasing odor samples with different concentrations through an odor release device, collecting data after ensuring that a test environment is stable through air purification and environment regulation and control, and designing an olfactory function evaluation model based on multi-dimensional comprehensive analysis and judgment; information processing and feature extraction are carried out on the response condition of the subject after the subject contacts the odor sample, and the mining depth of feedback data is further improved by using a hierarchical data processing method, so that the evaluation precision is improved. Meanwhile, during actual training of the model, a model training strategy for adaptive parameter adjustment is designed. According to the method, the optimized model is applied to an actual olfactory function evaluation scene, comprehensive and accurate evaluation and analysis of the human olfactory function can be realized, and the olfactory health condition can be judged in an auxiliary manner.

The invention discloses a system and a method for monitoring olfactory smell in a pension community based on Internet of Things, and relates to the technical field of pension, a TVOC sensor and an ammonia gas sensor are adopted to capture volatile organic compounds released by sweat in real time, and temperature, humidity and air fluidity data are combined to calculate a dynamic air quality index, so that the olfactory smell in the pension community is monitored. The defect that a traditional method only depends on temperature and humidity or CO2 concentration monitoring is overcome; secondly, in the air quality state analysis process, AI analysis is adopted for sweat and odor concentration prediction and pollution trend modeling, a long-short-term memory network LSTM is introduced for time sequence analysis, in combination with air quality change rate and humidity anomaly detection, it is guaranteed that air pollution can be timely and early recognized and predicted, and the problem of monitoring blind areas is avoided; and in the aspect of air optimization regulation and control, the air volume and the purification intensity of the air purification equipment are dynamically adjusted through ventilation control in combination with an air quality optimization instruction and an old people fitness activity mode.

The invention relates to the technical field of air purifiers, in particular to a spinning special air purifier which comprises a shell, a fan, an electrostatic generator and an ozone ion generator, a supporting plate with the L-shaped cross section is fixedly connected to the interior of the shell, and a dust removal net plate and an air purification filter element are fixedly connected to the supporting plate; one side of the shell is fixedly connected with an air inlet screen plate; a reciprocating screw rod is rotatably connected to the upper inner wall of the shell, a cleaning assembly is arranged on the reciprocating screw rod, the cleaning assembly comprises a bending block in threaded connection with the reciprocating screw rod, an opening is formed in the upper surface of the bending block, a mounting block is arranged in the opening, and a cleaning brush is fixedly connected to one end of the mounting block. According to the air purifier, air penetrates through the air purification filter element to be purified and then discharged, the air purification treatment effect is good, the service life of the air purifier is prolonged, and use of the air purifier is facilitated.

The invention provides a data acquisition and analysis method of an intelligent sofa, which comprises the following steps: arranging an electrostatic sensor array on the intelligent sofa, and acquiring electrostatic signal intensity and polarity distribution, human body charge and environmental humidity data of different areas on the surface of the sofa in real time to obtain electrostatic distribution data; under different air quality conditions including pollutant concentration and particulate matter content, according to the electrostatic characteristic parameters, a mapping relation model of the electrostatic characteristic parameters and the air quality is trained through a support vector machine algorithm; inputting sofa static signal intensity collected in real time into the trained mapping relation model of static characteristics and air quality to obtain changes of the static characteristics, and evaluating indoor air quality in real time; if the evaluation result shows that the air quality is smaller than the air quality threshold value, an air purification device of the intelligent sofa is triggered, an air purifier is started, and the ventilation amount of a fresh air system is increased so as to improve the indoor air environment.

The invention relates to a double-effect carbon clamping cloth with a regeneration function for an air purifier and a preparation method of the double-effect carbon clamping cloth, and the preparation method comprises the following steps: S1, uniformly mixing TiO2, K2CO3 and La (NO3) 3, roasting, immersing into a metal acid solution for dipping, taking out, drying and activating to obtain a heat release material; s2, ball-milling the heat release material obtained in the step S1 until the heat release material is uniform, and then adding a dispersing agent to obtain heat release material spraying liquid; s3, spraying the heat release material spraying liquid obtained in the step S2 on one side of a polyester non-woven fabric for multiple times to obtain a heat release skeleton layer; s4, a first hot melt adhesive net film, a first activated carbon layer and a second hot melt adhesive net film are sequentially laid on the non-spraying face of the heat-releasing framework layer obtained in the S3, after hot-pressing fixing is conducted, a second activated carbon layer, a third hot melt adhesive net film and melt-blown cloth are sequentially laid, hot-pressing forming is conducted, and the double-effect carbon clamping cloth with the regeneration function for the air purifier is obtained. Compared with the prior art, the filter material with the regeneration function is provided, the service life of a filter is prolonged, and the user cost is reduced.

The invention belongs to the field of air purification, and relates to module combined type comprehensive purification equipment and a purification method thereof.The module combined type comprehensive purification equipment is characterized in that a first gas sensor is arranged in a harmful gas collecting header pipe, and a second gas sensor is arranged in a pipeline between an exhaust port of a module combined type washing tower and a third electric control three-way valve; the first gas sensor and the second gas sensor are electrically connected with the ARM processor, and the ARM processor controls opening and closing of the module combined type washing tower, the mixing atomizing chamber and the module combined type adsorption box and controls opening and closing of the first electric control three-way valve, the second electric control three-way valve and the third electric control three-way valve. According to the method, the comprehensive harmful gas treatment sequence is as follows: firstly, acidic or alkaline dirt is removed, and then, activated carbon particle filtration and adsorption are performed. According to the invention, diversified, staged and complicated mixed harmful waste gas can be automatically and effectively purified.

The invention discloses an indoor energy-saving and environment-friendly decoration device, and relates to the technical field of air purification, the indoor energy-saving and environment-friendly decoration device comprises an anti-leakage mechanism, and further comprises a dust pumping and filtering mechanism connected with the anti-leakage mechanism and used for pumping dust in a sealed space of the anti-leakage mechanism; the rotary dust extraction mechanism communicates with the dust extraction filtering mechanism and is used for extracting indoor dust in multiple directions; the waste dust raising mechanism is connected with the rotary dust pumping mechanism; the anti-leakage mechanism is installed to cover a locally renovated room door, dust generated during indoor construction is prevented from drifting to a living room and other bedrooms, the problem that cleanliness of other positions is affected by local renovation is solved, the self-cleaning mechanism is installed to clean dust of a structure in contact with the dust, and the service life of the structure is prolonged. And through self dust cleaning, the influence of dust adsorbed on the structure in the dismounting process on the indoor environment is avoided, pollution to indoor air is avoided, the cleanliness of indoor furniture is protected, and the purpose of low-dust local renovation is achieved.

The invention provides an air purification method and device based on big data, electronic equipment and a storage medium, and relates to the technical field of data processing. The air purification method based on the big data comprises the steps that indoor air data detected by a plurality of air purifiers and environment sensing data detected by a plurality of associated sensors are obtained, and the actual air quality change trend is determined according to the indoor air data and the environment sensing data; according to the actual air quality change trend, the initial air pollutant concentration, the highest pollutant concentration and the air quality change attribute are determined, and the overall air quality in the current environment is determined according to the initial air pollutant concentration, the highest pollutant concentration and the air quality change attribute; according to the actual air quality change trend, the indoor air data and the environment sensing data, a pollution source and a corresponding pollution source type are determined; and according to the air influence data, the overall air quality, the pollution source and the pollution source type in the preset distance range, a target purification mode is determined.

The invention belongs to the technical field of air purification, and particularly relates to an environment-friendly formaldehyde removing device for indoor air pollution abatement, which comprises a box body, an axial flow fan, a stirring piece, a conveying mechanism, a storage piece and an absorbing and purifying mechanism, activated carbon particles are brought into the first cylindrical structure through the conveying mechanism, the activated carbon particles absorb formaldehyde in air, and the box body moves according to a set route to absorb formaldehyde in indoor air; after the activated carbon particles are used for a period of time, the activated carbon particles enter the storage piece, the conveying mechanism conveys the activated carbon particles on the lower portion of the first barrel into the containing cavity, and formaldehyde is continuously absorbed; the absorption and purification mechanism absorbs and purifies formaldehyde adsorbed on the activated carbon particles in the storage part, so that the adsorption capacity of the activated carbon particles is recovered, and cyclic utilization of the activated carbon particles is realized; and the activated carbon particles can be recycled without moving all the time, so that the damage probability of the activated carbon particles is reduced.

The invention discloses a filter cartridge type industrial dust remover for air purification, and relates to the technical field of industrial dust removers, the filter cartridge type industrial dust remover comprises a dust remover body, an air inlet pipe and an air outlet pipe are arranged on the dust remover body, and filter cartridges are mounted in the dust remover body at equal intervals; a filter mechanism capable of purifying air is assembled in the filter cartridge, an auxiliary mechanism capable of replacing a filter medium for filtering the air is assembled on the filter mechanism, the air is conveyed into the filter cartridge through an air inlet pipe by arranging the filter mechanism, and at the moment, the air is in contact with a filter screen at the top of the filter cartridge; large-particle impurities in the air are primarily filtered, the air is secondarily filtered through the filter media at the tops of the corresponding filter plates, then the air penetrates through the filter plates to make contact with the electrostatic dust collection part, the suspended impurities in the air are adsorbed through the electrostatic dust collection part, and the multiple purification effect is achieved.

The utility model discloses a multi-station cyclone smoke purifier, relates to the technical field of cyclone dust collectors, and aims to solve the technical problem that the smoke air purification effect is influenced due to the fact that the centrifugal force of air entering the purifier is easy to be insufficient at present. Comprising a cyclone cylinder, a filtering mechanism arranged on the cyclone cylinder and a discharging mechanism installed at the lower end of the cyclone cylinder, the upper portion of the cyclone cylinder is cylindrical, the lower portion of the cyclone cylinder is conical, a spiral pipe is installed at an air inlet of the cyclone cylinder, and the filtering mechanism comprises a filtering pipe arranged at the upper end of the cyclone cylinder. And a filter cylinder is arranged in the filter pipe, a cover plate is installed at the upper end of the filter pipe through bolts, a second exhaust pipe is installed at the upper end of the cover plate, and a first exhaust pipe is installed at the upper end of the cyclone cylinder in an embedded mode. The utility model has the advantages that the centrifugal force after smoke air enters can be increased, so that the air can rotate at a high speed for smoke purification, and the smoke purification effect can be ensured.

In order to solve the problem that sparks and fragments generated in the grinding process are prone to injuring the body of an operator, a grinding head is completely surrounded through a shell sleeve and an observation cylinder, when the end of a material is ground through the grinding head, the observation cylinder can observe the grinding state all the time, and in addition, the observation cylinder can observe the grinding state all the time. Fragments can be prevented from splashing outwards through blocking of the observation cylinder; and meanwhile, when the grinding head grinds, the fan blades can suck external airflow into the inner cavity of the shell sleeve, the airflow with fly ash is finally introduced into the water storage cavity, the fly ash is treated through a medium in the water storage cavity, dust is prevented from flying all around, and finally the surrounding protection and air purification effects are achieved.

The invention discloses an intelligent voice remote controller, which is characterized in that after a user sends an adaptive adjustment instruction, the state of the voice remote controller is adjusted to an adaptive state, in the adaptive state, an application scene is divided into functional sub-areas, and the optimal temperature range is determined by combining season information; calculating temperature adjusting values of different functional sub-regions, calculating air quality indexes corresponding to the air pollutant content according to sensor data, adjusting parameters of air conditioning equipment according to temperature and region information, and adjusting the power of air purification equipment and the opening and closing state of a window according to the air quality indexes. And active perception and self-adaptive adjustment of the environment and user requirements are realized.

The invention relates to the technical field of air purification, in particular to a total heat fresh air ventilator with disinfection, sterilization and air purification functions, which comprises a fresh air ventilator shell, a cover plate is hinged on the fresh air ventilator shell, a total heat exchange core body is fixedly arranged in the fresh air ventilator shell, and a plurality of partition plates are fixedly arranged in the fresh air ventilator shell. A plurality of foamed ceramic plates are placed in the fresh air ventilator shell, a disinfection and sterilization module is placed in the fresh air ventilator shell, a plurality of mounting mechanisms are rotatably connected in the fresh air ventilator shell, and an adjusting switch sealing plate is rotatably connected in the fresh air ventilator shell. According to the present invention, the market application bottleneck of the composite catalyst containing the AB-24 nanometer functional material is broken through, and the obtained product has the following prominent characteristics of broad-spectrum and efficient killing of indoor viruses and bacteria including new crown viruses, elimination of indoor space odor, decomposition of formaldehyde, TVOC and other harmful substances, high safety, environmental protection, no secondary pollution, and strong function durability.

The invention relates to the technical field of automobile air purification, and particularly discloses a filtering material, a preparation method of the filtering material and a novel automobile air conditioner multi-effect catalytic formaldehyde removal filter. The filtering material comprises a PET (Polyethylene Terephthalate) supporting layer, a gas filtering layer and a PP (Polypropylene) electrostatic filtering layer which are arranged in sequence, the gas filtering layer is prepared from the following raw materials in parts by weight: 30 to 90 parts of activated carbon and 10 to 70 parts of manganese catalyst. The gas filtering layer composed of the activated carbon and the manganese catalyst is matched with the filtering material composed of the PET supporting layer and the PP electrostatic filtering layer, four gases of n-butane, methylbenzene, sulfur dioxide and nitrogen dioxide can be adsorbed, the manganese catalyst degrades formaldehyde at normal temperature, meanwhile, the reaction on the formaldehyde is a catalytic reaction, and the environment-friendly effect is achieved. Therefore, the filter material disclosed by the invention also has longer service life, so that a filter made of the filter material has a better formaldehyde removal effect and longer service life.

The invention provides an air purification method and device, terminal equipment and a storage medium, and is suitable for the technical field of data processing.The method comprises the steps that initial indoor pollutant concentration information is obtained according to current indoor air environment information, current operation state information and a target indoor pollutant concentration prediction model; screening the initial indoor pollutant concentration information to obtain target indoor pollutant concentration information; and according to the target indoor pollutant concentration information and the indoor volume information, indoor ventilation quantity information is obtained, and indoor air purification treatment is carried out. According to the method, the internal relation among the indoor air environment information, the operation state information and the indoor air pollutant concentration change in the operating room is mined through the target indoor pollutant concentration prediction model, and the pollutant concentration change in the operating room is accurately predicted, so that the indoor ventilation quantity information is dynamically calculated for timely air purification; the timeliness and effectiveness of air purification in the operating room are improved, and the infection risk of a patient is reduced.

The invention belongs to the technical field of air purification, and discloses a nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: taking a nitrogen-containing organic heterocyclic ligand, a nitrogen doping agent, a non-noble metal salt compound and chitosan, carrying out a first hydrothermal reaction, carrying out tannic acid etching and first calcination treatment, carrying out MnO2 in-situ growth on the obtained nitrogen-doped MOF derived hollow porous carbon material, and introducing a rare earth metal salt compound to obtain the nitrogen-doped MOF derived hollow porous carbon material. And finally, taking the obtained nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material, graphene oxide and a reducing agent to carry out second hydrothermal reaction, ethanol soaking, freezing and freeze-drying treatment to obtain the nitrogen-doped MOF derived hollow porous carbon-rare earth metal doped MnO2 composite material. The nitrogen-doped MOF-derived hollow porous carbon-rare earth metal doped MnO2-graphene aerogel composite material has excellent adsorption and catalytic degradation activity on TVOC (Total Volatile Organic Compounds) such as formaldehyde and the like, and the composite material has a good application prospect in air purification.

The invention provides a photocatalytic composite material based on fly ash as well as a preparation method and application thereof, and belongs to the technical field of environment-friendly materials. According to the composite material, industrial waste fly ash and bismuth vanadate (BiVO4) are effectively compounded, so that the composite material shows excellent photocatalytic performance, especially can efficiently degrade organic pollutants such as formaldehyde under visible light irradiation, and has good stability and reusability. According to the composite material disclosed by the invention, the preparation cost is remarkably reduced, the resource utilization of the fly ash is also realized, and remarkable environmental protection and economic benefits are embodied. The material is particularly suitable for the fields of indoor air purification, wastewater treatment and other environmental pollution treatment, and can effectively improve air quality, protect human health and promote sustainable development. The photocatalytic composite material shows excellent catalytic efficiency in practical application, is high in adaptability and has a wide application prospect.

The present invention discloses a ventilation adsorption and deodorization device for a farm in the field of air purification technology, comprising a plurality of groups of containing mechanisms, wherein the containing mechanisms are used to load adsorbents, and the containing mechanisms can replace the adsorbents by disassembly; a feeding mechanism, wherein the feeding mechanism is used to unload the adsorbents in the containing mechanisms; a feeding mechanism, wherein the feeding mechanism is used to load the adsorbents into the containing mechanisms; and a disassembly mechanism, wherein the disassembly mechanism is used to assist the containing mechanisms in the disassembly and assembly during the process of replacing the adsorbents; so that the adsorbents can be efficiently fixed at a specific position by the containing mechanisms, and can come into more efficient contact with the air; and at the same time, since the adsorbents are loaded in the containing mechanisms, they can be better protected than in the traditional stacking method, so that the use efficiency of the adsorbents in the farms is higher.