838 results about "Gaseous pollutants" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention provides an in-situ electric heating desorption restoration technology and device for a contaminated site, belongs to the technical field of soil restoration, and solves the problems that soil and underground water are polluted due to industrial pollution and agricultural chemistry, and the like. The in-situ electric heating desorption restoration technology for the contaminated site comprises the steps of a, inserting a plurality of heating wells and extraction wells into the contaminated site; b, paving a thermal insulating layer on the surface of the contaminated site; c, carrying out precipitation treatment on the underground water of the contaminated site; d, heating the contaminated site through heating pipes in the heating wells, and extracting gaseous pollutants generated by the heated contaminated site and polluted underground water through vacuum pumps in the extraction wells, so as to restore the contaminated site; and e, feeding the gaseous pollutants and the polluted underground water extracted in the step d into a border thermal cycle pipe buried in a stratum at the border for secondary heat exchange, and then feeding the gaseous pollutants and the polluted underground water subjected to secondary heat exchange into a ground extraction treatment device for treatment. The in-situ electric heating desorption restoration technology has the advantages that full automatic temperature control is achieved, waste heat is fully reused, the layout is flexible, a higher scientific and technological level is reached, and the like.

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.

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.