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841 results about "Gaseous pollutants" patented technology
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Gaseous pollutants: A different mix of vapors and gaseous air pollutants is found in outdoor and indoor environments. The most common gaseous pollutants are carbon dioxide, carbon monoxide, hydrocarbons, nitrogen oxides, sulfur oxides and ozone.
Reactor design to reduce particle deposition during process abatement
InactiveUS20070274876A1Reduce accumulationReduce crackingCombination devicesBurnersCombustionDecomposition
The present invention relates to systems and methods for controlled combustion and decomposition of gaseous pollutants while reducing deposition of unwanted reaction products from within the treatment systems. The systems include a novel thermal reaction chamber design having stacked reticulated ceramic rings through which fluid, e.g., gases, may be directed to form a boundary layer along the interior wall of the thermal reaction chamber, thereby reducing particulate matter buildup thereon. The systems further include the introduction of fluids from the center pilot jet to alter the aerodynamics of the interior of the thermal reaction chamber.
Owner:APPLIED MATERIALS INC
Onsite chemistry air filtration system
ActiveUS20070041882A1Reducing airborne bio-matterLower capability requirementsCombination devicesAuxillary pretreatmentAir filtrationGas phase
An onsite chemistry air filtration system to remove gaseous contaminants from air is disclosed. The onsite chemistry air filtration system of the present invention comprises: a conventional particulate filtration section, a photochemical filtration section, a static gas phase filtration section and a catalytic filtration section. The conventional particulate filtration section captures solids and condensables. In the photochemical filtration section, UV lamps generate bio-destruction and surface photochemical activity on a semiconductor catalyst material, provide a radiation source to irradiate airborne contaminant molecules and to energize their states to promote reactions and generate airborne ozone and radicals. In the static gas phase filtration section, gas phase filtration media is used to capture contaminants, concentrate them in a relatively confined space and allow airborne generated chemistries to concentrate and react in-situ, thereby creating a regeneration effect on the media. In the catalytic filtration section, catalytic media scavenges and converts airborne radicals and ozone to harmless by-products.
Owner:ROSEBERRY JEFFREY L
Method and apparatus for purification of hydride gas streams
A process and apparatus for the decontamination of gaseous contaminants (especially oxygen, carbon dioxide and water vapor) from hydride gases (including their lower alkyl analogs) down to <=100 ppb contaminant concentration are described. The critical component is a high surface area metal oxide substrate with reduced metal active sites, which in various physical forms is capable of decontaminating such gases to <=100 ppb, <=50 ppb or <=10 ppb level without being detrimentally affected by the hydride gases. The surface area of the substrate will be >=100 m2 / g, and preferably 200-800 m2 / g. Oxides of various metals, especially manganese or molybdenum, can be used, and mixtures of integrated oxides, or one type of oxide coated on another, may be used. The substrate is preferably retained in a hydride-gas-resistant container which is installed in a gas supply line, such as to a gas- or vapor-deposition manufacturing unit. The invention provides final decontamination for hydride gas streams intended for gas- or vapor-deposition formation of high purity LED, laser (especially blue laser), electronic, optical or similar products, and can be used in combination with upstream preliminary decontamination process and / or upstream or downstream solid particulate removal units.
Owner:SAES PURE GAS
Permeable bricks inlaid with nanometer titanium dioxide and preparation method thereof
ActiveCN102535725ASolve processing problemsEnrich and perfect connection technologyCeramic shaping apparatusBuilding componentsBrickPhotocatalytic degradation
The invention relates to permeable bricks inlaid with nanometer titanium dioxide and a preparation method thereof and belongs to the field of building materials. According to the preparation method provided by the invention, titanium dioxide precursor turbid liquid is evenly sprayed into holes of permeable brick base bodies, and then the permeable brick base bodies are dried and calcined for 10-30 min so as to obtain the permeable bricks inlaid with nanometer titanium dioxide and anatase type nanometer titanium dioxide is uniformly inlaid in the holes of the obtained permeable bricks. The permeable bricks can effectively degrade contaminants in water seepage passing though the permeable bricks and some organic contaminants attached to the surfaces of brick bodies in a manner of photochemical catalysis and also can degrade a part of gaseous pollutants in air in a manner of photochemical catalysis.
Owner:DALIAN POLYTECHNIC UNIVERSITY
Method for removing various gaseous pollutants from smoke gas
InactiveCN101745305ASolve the problem of separate managementImprove mercury removal performanceDispersed particle separationAir quality improvementMulti pollutantSlurry
The invention provides a method for removing various gaseous pollutants from smoke gas, which is used for solving the problem of limitation of the control and government technology on various pollutants in the smoke gas. The invention utilizes an absorption tower for fully removing SO2, NOX, mercurial vapor and CO2 in the smoke gas, the lower part of the absorption tower is provided an absorptionpulp tank, the middle of the absorption tower is provided with a spraying pipe, the upper part of the absorption tower is provided with an oxidizing agent pipe, the absorption tower is provided with partition boards in the vertical direction, both sides of the partition boards are respectively a desulfurization work section and a denitration and decarburization work section, the upper part of theabsorption tower is a communication oxidization region, the smoke gas enters the desulfurization work section from an inlet of the absorption tower to complete the removal of SO2 and HCL, the smoke gas continuously goes upwards to enter the oxidization region, and NOX is oxidized into water-soluble high oxide in the oxidization region and then enters the denitration and decarburization work section to complete the removal of the NOX, the mercurial vapor and the CO2. The invention breaks through the technical bottlenecks of complicated equipment and high running cost for simultaneously removing various gaseous pollutants from the smoke gas in the prior art. The process method and the device of the invention have the unique novelty.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Control for industrial smoke on-line monitoring system and data transmission system and method
InactiveCN1936995ALow costReduced stabilityElectric signal transmission systemsMaterial analysisData acquisitionEngineering
The invention includes following subsystems and procedures: smoke-dust monitoring subsystem for monitoring concentration of smoke-dust in real time; subsystem of monitoring parameters of fume emission in use for detecting parameters including oxygen content, flow rate, pressure, and temperature in real time; subsystem of monitoring gaseous pollutant in use for sampling and controlling fume to carry out pretreatment; system control and data acquisition process subsystem in use for collecting signals output from the said subsystems, carrying out processing, storing, displaying, recording and statistical operations to implement transferring data in real time remotely; communication between program controlled pretreatment for fume and computer in central station of monitoring environmental protection. Using modern techniques such as sensor, detection, computer, network etc, the invention possesses advantages of high automation, good stability, quick processing and low operating cost.
Owner:JIANGNAN UNIV
Reactor design to reduce particle deposition during process abatement
InactiveUS20060104879A1Reduce accumulationReduce reactor chamber crackingCombination devicesBurnersCombustionDecomposition
The present invention relates to systems and methods for controlled combustion and decomposition of gaseous pollutants while reducing deposition of unwanted reaction products from within the treatment systems. The systems include a novel thermal reaction chamber design having stacked reticulated ceramic rings through which fluid, e.g., gases, may be directed to form a boundary layer along the interior wall of the thermal reaction chamber, thereby reducing particulate matter buildup thereon. The systems further include the introduction of fluids from the center pilot jet to alter the aerodynamics of the interior of the thermal reaction chamber.
Owner:APPLIED MATERIALS INC
Substrate transport container
InactiveUS6875282B2Semiconductor/solid-state device manufacturingEmergency protective arrangement detailsEngineeringAir conditioning
A substrate transport container is used, for example, in the process of manufacturing integrated circuits of less than 0.13 μm line width, can hold the level of contaminants in the interior of the container for at least particles, acidic gases, basic gases, organic substances and humidity at controlled low levels, and has the size and structure to be compatible with automated semiconductor manufacturing plants. The container is provided with a door for loading and unloading substrates on a surface of a container main body and is constructed so as to hold the substrates inside the container main body at a given distance of separation. Air conditioning apparatuses for reducing the levels of particulate and gaseous contaminants are disposed roughly symmetrically on the container main body.
Owner:EBARA CORP
Process for removing gaseous contaminants from a feed gas stream comprising methane and gaseous contaminants
InactiveUS20100107687A1Energy efficiencyGood removal effectCombination devicesSolidificationGas phaseDistillation
A process for removing gaseous contaminants from a feed gas stream that comprises a gaseous product and gaseous contaminants, comprising: providing the feed gas stream, cooling the feed gas stream to a temperature at which liquid phase contaminant is formed as well as a gaseous phase rich in gaseous product, separating the two phases by means of a gas / liquid separator, and introducing the gaseous phase rich in gaseous product into a cryogenic separation device that comprises a freezing zone and a distillation zone positioned below the freezing zone, and removing from the cryogenic separation device a bottom stream rich in liquid phase contaminant and lean in gaseous product, and a top stream rich in gaseous product and lean in gaseous contaminant. The invention further includes a device for carrying out the present process, the purified gas stream, and a process for liquefying a feed gas stream.
Owner:SHELL OIL CO
Chemical filter and method for manufacturing same
InactiveUS7364608B2Increase volumePrevent disengagementIon-exchange process apparatusLiquid surface applicatorsFiberIon exchange
Owner:NICHIAS CORP
Catalytic filter for removing soot particulates from diesel engine exhaust and method of preparing the same
Owner:SK ENERGY CO LTD (KR)
Low-temperature plasma smoke compound pollutant control method
InactiveCN102059050ALow costImprove space utilizationCombination devicesAir quality improvementNitric oxideHigh pressure
The invention discloses a low-temperature plasma smoke compound pollutant control method. By discharging at a high voltage to generate low-temperature plasmas in a dry reactor and a wet reactor, the method controls pollutants and oxidized by-products in the smoke, such as smoke dusts, sulfur dioxide, oxynitride, hydrogen sulfide, hydrogen chloride, heavy metal and the like, by combination with the conventional dedusting method, the ammonia method desulfuration, the limestone / gypsum wet method, the rotary atomization drying method and the like, wherein the dry plasma reactor is used together with a dedusting device to improve the dedusting efficiency and oxidize the nitric oxide; and an absorbing device is used together with the wet plasma reactor to remove gaseous pollutants, oxidize ammonium sulfite, namely a desulfurized product of an ammonia absorber, demist and purify the tail gas. The method can be used for controlling smoke compound pollutants of boilers or incinerators.
Owner:ZHEJIANG UNIV
Removal of mercury emissions
ActiveUS20130078169A1Efficient removalEfficient methodGas treatmentUsing liquid separation agentActivated carbonSorbent
A system for removing gaseous pollutants, such as mercury from flue gases of a solid-fueled furnace (17), includes a sorbent mill (34) that receives superheated steam and a sorbent (28), such as activated carbon, in a partially agglomerated state, that processes the sorbent (28) by de-agglomerating and comminuting the sorbent (28). An educator (35) transports the processed sorbent (28) to a distributor (36) that injects it into the flue gases at a contact location having a temperature between 500° F. and 900° F., whereupon the sorbent (28) adsorbs mercury from the flue gas. A particle collection device (24) removes the processed sorbent (28) having adsorbed mercury, from the flue gas.
Owner:GENERAL ELECTRIC TECH GMBH
Composite air purifying filter paper material and filter element using same
InactiveCN106334373AImprove fast purification adsorption performanceImprove removal rateGas treatmentDispersed particle filtrationFiberEnvironmental engineering
The invention relates to a composite air purifying filter paper material and a filter element using the same. The composite air purifying filter paper material comprises an active carbon fiber pre-filtering layer, an adsorption catalytic particle layer, a particulate matter filtering layer and a sterilizing supporting layer which are superposed according to any sequence. Compared with the existing filter paper material, the composite air purifying filter paper material is provided with the active carbon fiber pre-filtering layer; an air purifying filter element prepared from the composite air purifying filter paper material can significantly improve quick purification and adsorption performance on pollutant molecules, such as peculiar smell and the like, in the environment, and the removal rate of the whole filter element on gas-state pollutant molecules is increased.
Owner:WUHU MATY AIR CONDITIONING EQUIP CO LTD +1
Semi-dry method refuse burning fume cleaning treatment method and system thereof
ActiveCN101310835AEvenly distributedImprove absorption efficiencyDispersed particle separationAutomatic controlWater discharge
The invention provides a semi-dry garbage incineration flue gas purifying treatment method and a system device thereof, flue gas enters a spray tower from a waste heat boiler, activated carbon is injected into a horizontal inlet flue to remove dioxin and heavy metals in the flue gas; the flue gas is simultaneously carried out the reaction with a high specific surface area alkaline neutralizer, most of the harmful substances in the flue gas are purified by generating chemical reactions with the alkaline neutralizer; when the flue gas passes through a filter layer which is formed by granule materials in a bag dust collector, gaseous pollutants can still be reacted with non-reacted lime and activated carbon in the filter layer to be further purified. The system device can lead the flue gas and the high specific surface area lime emulsion to achieve the best contact area, thus ensuring the best flue gas retention time, achieving the full heat transfer and the chemical and heat transfer process; furthermore, the spray is even, the anti-blockage and the anti-corrosion performances are better; a lime emulsion preparation device can automatically control and prepare the concentration and the using amount of the emulsion to be participated in the reaction according the content of wastes in the ingredients of the flue gas and the temperature of the flue gas; the usage and the regulation of the neutralizer are flexible. The system device further has the advantages of low investment cost, strong load adaptability and no waste water discharge, etc.
Owner:DESIGN INST OF CHONGQING IRON & STEEL GRP
Air purification system and method of purifying air
InactiveUS20080271603A1Mechanical apparatusUsing liquid separation agentEnvironmental engineeringAqueous solution
An air purification system and method of purifying air according to various embodiments of the invention includes an ambient air inlet and a purified air outlet for the passage there through of air via a transport line. At least one cleaning chamber configured to contain therein an aqueous solution containing a reactant medium is in fluidic communication with the transport line. The ambient air passes through the at least one cleaning chamber and bubbles through the aqueous solution reacting with the reactant medium contained therein to remove gaseous pollutants and / or particulates. To recharge the system, a user simply changes out the cleaning chamber when the reactant medium is no longer capable of reacting to remove the gaseous pollutants and / or particulates from air passing there through.
Owner:DIAL CORPORATION
Gas purification device, multifunctional electronic respirator and dust cup
ActiveCN103585844AImprove purification effectCombination devicesSuction filtersHigh-voltage direct currentEngineering
The invention relates to a multifunctional electronic respirator. The multifunctional electronic respirator comprises a gas purification device. The gas purification device comprises at least one corona field for generating high-voltage static electricity, wherein the corona field is generated by applying certain high-voltage direct current between at least one corona wire serving as a negative electrode and an electric conductor serving as a positive electrode, and is provided with an air circulation channel for introduction and discharging of air, so that air which flows into the corona field from the air inlet side of the air circulation channel is purified by static electricity and then flows out from the air outlet side of the air circulation channel, the air outlet side is provided with an adsorption filter screen which is made of electric conduction materials, used for the flowing out of air entering the corona field and provided with an active surface, and after high-voltage direct current is applied on the electric conductor and the corona wire, the adsorption filter screen has positive charge with polarity same as that of the electric conductor. The gas purification device can filter and intercept particles, also can absorb small particles, and meanwhile can adsorb gaseous pollutants so as to be good in purification effect.
Owner:营养屋(北京)科技发展有限公司
Catalyst for GPF (gasoline particulate filter) and preparation method of catalyst
ActiveCN108295851AGood dispersionHigh particle capture rateExhaust apparatusHeterogenous catalyst chemical elementsThermal ageingRare earth
The invention relates to a catalyst for a GPF (gasoline particulate filter) and a preparation method of the catalyst, and belongs to the technical field of catalyst preparation. Wall-flow cordierite honeycomb ceramic is taken as a support, pore channel walls inside a gas inlet end and a gas outlet end of the support are coated with a first coating and a second coating respectively, the first coating contains a Ce-Zr rare earth composite oxide and an La-Al composite oxide, and the second coating contains a Ce-Zr rare earth composite oxide, an La-Al composite oxide and an alkaline earth metal oxide. Coating quantities of the first coating and the second coating are 30-60 g / L, and axial height of each coating is 50%-90% of the support height. Precious metals Rh and Pd are supported on the first coating and the second coating respectively. The preparation method is simple and easy to operate. Exhaust back pressure of the catalyst is reduced remarkably by means of a coating regulator, dispersibility of the coatings is improved, the catalyst still keeps higher particulate filter efficiency and gaseous pollutant removal rate while the exhaust back pressure is reduced, besides, thermal stability of the precious metal Pd is improved by the alkaline earth metal oxide, and thermal ageing resistance of the catalyst is improved.
Owner:WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
Device For The Leak-Tight Sealing Of Packaging Containers For Sensitive Products
ActiveUS20070272646A1Eliminate the problemReduce disadvantagesCapsClosure using stoppersEngineeringAmbient air
The invention relates to a device for the leak-tight sealing of openings in containers and for the purification of the ambient air located therein as a result of opening and closing cycles, said containers being intended for the packaging of products that are sensitive to gaseous pollutants present in the ambient air. The inventive device is particularly suitable for the packaging of solid-state medicaments in the form of pellets, tablets or capsules, having a reactivity and physical integrity that must be fully conserved.
Owner:AIRNOV INC
Method of removing PM2.5 and gaseous pollutant using steam phase transition and device thereof
InactiveCN101224367ALarge granularityQuality improvementAuxillary pretreatmentUsing liquid separation agentSteam condensationPollution
The invention relates to a method and a device which adopt steam phase changing to cooperatively remove PM2.5 and gas pollutions from a high temperature and high humidity flue gas. The invention comprises a dust catcher, a flue gas humidity regulating chamber, a condensing heat exchanger and a washing absorption tower. The method is that the flue gas enters the flue gas humidity regulating chamber after coarse dust removing in the dust catcher, and atomized hot water is sprayed to regulate the humidity of the flue gas; after humidity regulation, the flue gas is induced into the condensing heat exchanger to reach supersaturation, and the supersaturation steam takes the PM2.5 as condensing core to generate phase changing, thus increasing the granularity of the PM2.5; then the steam enters the washing absorption tower, and in the tower, the flue gas reversely contact a middle-lower temperature alkalescent washing-adsorbing liquid to be further subject to the phase changing of the steam taking PM2.5 as condensing core, and the alkalescent washing-adsorbing is adopted for removing the growing dust-drop and gas pollutions. Taking the characteristics of the high temperature and high humidity flue gas into account, the invention adopts the steam phase changing theory to lead the PM2.5 to be condensed and to grow so as not only to cooperatively remove PM2.5 and gas pollution, but to recycle the gasifying potential heat released by steam condensing and the sensible heat caused by temperature reduction of the flue gas.
Owner:SOUTHEAST UNIV
Multifunctional air purification filter screen
PendingCN107469614AEffective interceptionReduce wind resistanceGas treatmentDispersed particle filtrationAir filtrationHEPA
The invention discloses a multifunctional air purification filter screen, which comprises a primary filter module, an HEPA filter module, and a gas adsorption and catalytic degradation module. The multi-module structures are connected and fixed into an integral filter screen from the outside in, the filter screen can achieve effective interception of fine particulate matters (PM2.5), bacteria, viruses and other particulate pollutants and thorough decomposition and purification of formaldehyde, ozone, toluene and other gaseous pollutants, also has deodorization, bacteriostasis and sterilization effects, is a multifunctional air purification filter screen integrating air filtration, purification, antibacterial efficacy, etc. With the characteristics of small wind resistance, long service life and good stability, the multifunctional air purification filter screen provided by the invention has great application prospects in air purifiers, central ventilation systems and other air purification devices, also is low in cost, and can realize large-scale continuous production.
Owner:INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
In-polluted-site heat-intensifying vapor extracting and repairing integrated device and application method
InactiveCN103350104AEasy to controlRealize real-time controlContaminated soil reclamationAutomatic controlDesorption
The invention provides an in-polluted-site heat-intensifying vapor extracting and repairing integrated device and an application method. The integrated device comprises a high pressure fan, a gas-liquid separation tank, an active carbon absorption tower, an automatic control cabinet, a heating electrode, a flow meter, a vacuum gage, a temperature sensor, a humidometer and an organic pollution gas detector; an extracting pipeline is connected with an extracting well, and the heating electrode is embedded in a polluted area. The specific application method comprises the steps as follows: starting the heating electrode to raise the temperature of the soil in the site and promote the desorption of the pollutant in the soil, then starting the high pressure fan, forming a negative pressure in the pipeline to generate flowing of gas from the extracting well to the outside, taking away the pollutant in the soil from the soil along with the flowing of the gas, and enabling the active carbon absorption tower to absorb the gas pollutant to fulfill the purpose of repairing the polluted site. The in-polluted-site heat-intensifying vapor extracting and repairing integrated device and the application method are used for repairing the soil in the organic polluted site, so that not only the pollutant removal rate is improved, but also the influence of the low temperature condition on the vapor extracting technique is further reduced, the effective repairing working time in winter is prolonged, and the purpose of efficiently treating the polluted site is fulfilled.
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS +1
Purification material of gas-state pollutants as well as preparation method and application of purification material
InactiveCN106732572AImprove adsorption capacityLow costGas treatmentOther chemical processesManganese oxidePt element
The invention provides a purification material of gas-state pollutants. The purification material takes an adsorption material as a carrier; titanium dioxide, manganese oxide and reduced-state noble metal are loaded on the carrier, wherein the loading amount of the titanium dioxide is 0 to 60 percent of the mass of the adsorption material; the loading amount of the manganese oxide is 0.1 to 10 percent of the mass of the adsorption material; the loading amount of the reduced-state noble metal is 0.01 to 1 percent of the mass of the adsorption material; the reduced-state noble metal is one or two or more than two of platinum, palladium, gold and silver; the titanium dioxide is modified by adopting an ion doping modification manner and a photocatalyst is loaded by the adsorption material with a high adsorption property, so that a composite catalyst with high efficiency, low cost and no secondary pollution is prepared; the composite catalyst can be used for purifying VOCs (Volatile Organic Chemicals) including formaldehyde, benzene, toluene and the like in indoor air and eliminating O3 gas-state pollutants under room temprature; the disadvantage of an existing air purification technology that the efficiency of removing the gas-state pollutants is low is overcome.
Owner:SUN YAT SEN UNIV
Method for preparing silica aerogel photocatalyst formed by compounding nanometer titanium oxide and rare earth solid solution
ActiveCN104056616ALarge specific surface areaImprove adsorption capacityMaterial nanotechnologyDispersed particle separationRare earthSolid solution
The invention discloses a method for preparing silica aerogel photocatalyst formed by compounding nanometer titanium oxide and a rare earth solid solution. The method is particularly characterized in that nanometer titanium oxide / rare earth is attached to the specific surface of silica aerogel, the silica aerogel has the function of adsorbing and catching formaldehyde and other gaseous pollutants in air, and the adsorbed and caught gaseous pollutants can be decomposed through the photocatalysis of anatase titanium oxide loaded on the surface. The advantages of the preliminary screening function of the nanoscale cellular structure of the silica aerogel and the advantages of the catalysis function of nanoscale anatase titanium oxide are integrated, rare earth oxide and nanometer titanium oxide represent a solid solution shape, activity of nanometer titanium oxide is further enhanced, and the long-acting effect and the strong effect of the material catalysis function are achieved.
Owner:天津朗华科技发展有限公司
Reflective lamp to maximize light delivery to a photoactive catalyst
ActiveUS20050061656A1Maximizes deliveryImprove photocatalytic efficiencyMechanical apparatusLighting and heating apparatusLight deliveryUltraviolet lights
A lamp including a reflective portion is utilized in a fluid purification system to maximize the light delivery to a photocatalytic coating that oxidizes gaseous contaminants that adsorb onto the surface to form carbon dioxide, water, and other substances. An ultraviolet light source positioned proximate to the honeycomb activates the titanium dioxide coating. In one example, the reflective portion is a reflective coating. Light directed out of the non-reflective portion of the lamp travels towards the honeycomb and absorbs onto the photocatalytic coating. Light directed towards the reflective portion on the lamp is reflected off the surface of the reflective portion and passes through the non-reflective portion of the lamp to also absorb onto the photocatalytic coating. The reflective portion reflects light towards the honeycomb that would otherwise be misdirected away from the honeycomb, increasing efficiency of the fluid purification system.
Owner:CARRIER CORP
Controlling method and device of air purifier
ActiveCN104296317AAccurate purificationImprove purification rateMechanical apparatusSpace heating and ventilation safety systemsEngineeringAir purifier
The invention discloses a controlling method of an air purifier and a controlling device thereof. The controlling method comprises the following steps of: acquiring environmental parameters and air parameters of to-be-purified environment; acquiring the first clean air delivery rate and the second clean air delivery rate according to the environmental parameters and the air parameters, wherein the first clean air delivery rate is the particulate matter clean air delivery rate while the second clean air delivery rate is the gaseous pollutant clean air delivery rate; controlling particulate matters in the to-be-purified environment of the air purifier according to the first clean air delivery rate. The controlling method can solve the problem of inaccurate control and weak purification effect because the clean air delivery rate is adjusted according to shifts in the present air purifier, such that the air purifier can be precisely controlled in purification and the purification rate is also improved.
Owner:GREE ELECTRIC APPLIANCES INC
Air quality space-time prediction method based on long-term and short-term memory neural network
The invention discloses an air quality space-time prediction method based on a long-term and short-term memory neural network. Particulate matter concentration data of an experiment station and a nearest adjacent station, meteorological data and gaseous pollutant data in the same period are integrated and converted into a supervised learning data format, normalization processing is carried out onthe data, and a prediction sequence of the air mass concentration is obtained by training the data through the long-term and short-term memory network. The method comprises the following steps: S1, acquiring historical air quality data and meteorological data; S2, performing data preprocessing, including abnormal value elimination, missing value interpolation processing, extraction of particulatematter concentration data of adjacent stations and data normalization, on the historical air quality; S3, converting a data format from a sequence to input and output sequence pairs; S4, dividing thedata set into a training set and a test set, and initializing various hyper-parameters of the long-term and short-term memory network; and S5, testing the model effect through prediction on the test set. According to the method, the prediction precision of the air quality data can be improved.
Owner:HANGZHOU DIANZI UNIV
In-situ electric heating desorption restoration technology and device for contaminated site
ActiveCN105834205AOutstanding and Beneficial Technical EffectsNo emissionsContaminated soil reclamationDesorptionEngineering
Owner:SHANGHAI GREENMENT ENVIRONMENTAL TECH CO L
Perovskite fiber boy compound oxide catalyst for treating automobile's waste gas, and method for preparing same
InactiveCN101036888AHigh catalytic activityImprove purification efficiencyDispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsFiberElectrospinning
The present invention relates to a perovskite type corpus fibrosum composite oxide catalyst for vehicle tail gas clean-up and the preparation method of the same. The catalyst has the following formula: La1-XKXCoO3, wherein X is within the range of 0.0~0.6. The preparation method comprises the steps of: (1) preparing of precursor sol; (2)electrostatic spinning; and (3)sintering. The catalysis collector is replaced by perovskite type rare earth composite oxide corpus fibrosum, so that the granules contained in the discharged vehicle tail gas can be captured, the PM and NOx can be removed at the same time and the discharge amount of other gaseous contaminant can be reduced.
Owner:TIANJIN UNIV
Air pollutant parameter processing method, device, equipment and system
ActiveCN104316655AIncrease or decrease clean air volume valueSolve the problem that the CADR value required to purify the current space cannot be displayedAir quality improvementMaterial analysisDisplay deviceAir pollutants
The invention discloses an air pollutant parameter processing method, an air pollutant parameter processing device, air pollutant parameter processing equipment and an air pollutant parameter processing system. The air pollutant parameter processing equipment comprises a sensor device, a central processing unit and a display device, wherein the sensor device is arranged in an indoor environment and is used for detecting real-time pollutant concentrations of gaseous pollutants and particulate contaminants in the indoor environment in real time; the central processing unit is connected with the sensor device and is used for determining clean air delivery rates of the gaseous pollutants and the particulate contaminants according to the real-time pollutant concentrations; the display device is connected with the central processing unit and is used for displaying values of the clean air delivery rates. According to the technical scheme, the problem that in the prior art, CADR values required for purifying a current space cannot be displayed is solved, and the effects of determining the CADR values required for purifying the current space can be determined according to the real-time pollutant concentrations of the gaseous pollutants and the particulate contaminants in the current indoor environment and displaying the CADR values are achieved.
Owner:GREE ELECTRIC APPLIANCES INC
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