281 results about "Volatile organic compound" patented technology

This invention discloses an environmentally friendly flame-retardant vinyl resin and its preparation method. The steps include: introducing phosphorus element by ring-opening modification of epoxy resin with phosphoric acid; adding a silane coupling agent to graft double bonds and constructing a Si-O-Si inorganic network in situ; and completely replacing styrene with a self-made reactive phosphorus-silicon synergistic flame-retardant diluent. This application constructs a phosphorus-silicon inherently flame-retardant system through molecular structure design, forming an organic-inorganic interpenetrating network structure. Without adding halogen flame retardants or emitting volatile organic compounds, the flame-retardant properties, mechanical strength, and thermal stability of the resin are improved. The phosphorus element and the inorganic network produce a gas-condensate synergistic effect, giving the cured product a high heat distortion temperature and low smoke emission, meeting the needs of high-end applications.

The application discloses a pet food palatability evaluation method based on gas chromatography-ion mobility spectrometry (GC-IMS) and a prediction model construction method, and belongs to the technical field of pet food quality analysis. The application aims at the problems of the existing palatability evaluation, such as strong subjectivity, long cycle and lack of standardized model, and adopts headspace-GC-IMS technology to rapidly detect volatile organic compounds (VOCs) in pet food, so as to obtain a VOCs fingerprint spectrum of the sample. In combination with standard samples with known palatability test results, key palatability markers are screened through orthogonal partial least squares discriminant analysis (OPLS-DA), and a palatability prediction model is established. The application first applies the GC-IMS technology to pet food palatability evaluation, realizes objectification, rapidness and standardization of detection, overcomes the subjectivity and low efficiency of traditional methods, and can provide reliable scientific basis for formula optimization, quality control and raw material screening of pet food.

This invention relates to the field of hazardous waste incineration technology and discloses a negative-pressure closed-loop pyrolysis pretreatment system for rotary kiln hazardous waste incineration, comprising: a waste heat flue gas heating unit, a negative-pressure closed-loop pyrolysis pretreatment chamber unit, a pyrolysis waste gas return and destruction unit, and a safety control unit. By using medium-temperature flue gas from the downstream section of the waste heat boiler as the heating medium, energy cascade utilization is achieved and high-grade energy consumption is reduced; high-moisture or high-viscosity hazardous waste is dehydrated and pyrolyzed before entering the kiln, significantly reducing the risk of temperature fluctuations and coking / blockage within the kiln; through a closed negative-pressure collection and centralized destruction path in the secondary combustion chamber, front-end control and centralized destruction of pollutants such as volatile organic compounds are achieved; through inerting replacement, flame arrest and backfire prevention, online monitoring, and SIS hard interlocking, the inherent safety level and abnormal operating condition handling capabilities of the system are improved. A systematic solution that can be coupled with existing incineration lines and balances energy utilization, environmental control, and inherent safety is proposed.

The utility model discloses a wheat smut infection detection device based on array type gas sensor, it includes box, the sample collection mechanism is installed to the box top, is provided with sensor mechanism, control mechanism, drive mechanism and power supply mechanism in the box interior, the sample collection mechanism includes sample heating stage and sample collection room, the sensor mechanism includes vacuum air pump, data acquisition card, data acquisition card seat, sensor gas chamber, activated carbon filter and gas flow control meter, and the control mechanism includes core processing unit, and its core processing unit is connected with data acquisition card seat through GPIO interface, and drive mechanism includes motor drive, and it is used for controlling the working condition of vacuum air pump, and power supply mechanism is used for supplying the electric energy of whole device, the utility model discloses does not need any chemical reagent or complicated physical processing, can complete the collection and analysis of volatile organic compound in a few minutes, greatly shortens the long time period required by traditional detection method.

The application discloses a kind of photothermal regeneration monolithic adsorbent and its preparation method and the application of volatile organic compounds of light-controlled desorption.The photothermal regeneration monolithic adsorbent has three-layer structure, and the three-layer structure is respectively top layer photothermal layer, middle adsorption layer and substrate layer from top to bottom;The substrate layer is ceramic fiber;The middle adsorption layer is MCM-41;The top layer photothermal layer is polypyrrole.The three-layer structure design of the application can meet the periodic operation requirements of convenient adsorption-photothermal regeneration, widen the application range of light-controlled desorption VOCs adsorbent, and the regeneration adsorption efficiency can reach more than 80%.

The utility model provides a kind of fine-grained high-temperature molybdenum copper-based composite material heat treatment temperature control furnace, it is related to temperature control furnace technical field, including furnace body and furnace door, the outside surface of furnace body is fixedly installed air inlet pipe and exhaust pipe, solenoid valve one and solenoid valve two are set on air inlet pipe and air outlet pipe;In the utility model, by fixedly installing filter box at the end of exhaust pipe away from furnace body, filter box cooperates with bearing filter frame and activated carbon layer to filter and handle waste gas generated during heat treatment process, which contains particulate matter, volatile organic compounds and possibly harmful metal compounds and other components, avoid waste gas directly discharging to pollute surrounding environment, also prevent waste gas from affecting air quality in workshop, protect the health of operating personnel and the normal operation of other equipment, help to maintain good production environment, and also convenient to disassemble bearing filter frame by screw rod, clamping block and fixed block and other structures, convenient to replace activated carbon layer in later period.

This application relates to the field of tail gas absorption technology, specifically disclosing a tail gas absorption device for phenothiazine production. The pretreatment mechanism in this application can induce sublimation of phenothiazine microcrystals in the tail gas through multiple stages, allowing the microcrystals to grow sufficiently to a collectable size before entering the collection zone. Then, a multi-stage blade collection mechanism progressively adheres and collects the grown microcrystals, achieving efficient recovery of the phenothiazine microcrystals. Simultaneously, an absorption tower is set up to absorb hydrogen sulfide from the collected tail gas with alkaline solution, and an activated carbon adsorption tower is set up to deeply purify residual hydrogen sulfide and volatile organic compounds. This forms a complete treatment chain with graded treatment and each stage performing its specific function, effectively solving the problem of blockage caused by microcrystals directly entering the absorption tower in existing technologies, while also achieving the recycling of high-value products.

The application belongs to the technical field of volatile organic compounds (VOCs) treatment, and particularly relates to a cerium-based VOCs purification catalyst and a preparation method thereof. The application provides a preparation method of a cerium-based VOCs purification catalyst, which comprises the following steps: (1) dispersing an organic ligand and a precursor of cerium in N,N-dimethylformamide respectively to obtain a ligand solution and a cerium solution; (2) adding the ligand solution obtained in the step (1) into the cerium solution to perform a hydrothermal reaction, and obtaining a solid product after solid-liquid separation; and (3) performing washing and drying on the solid product obtained in the step (2), and performing calcination to obtain catalyst particles. The preparation method has simple process, reduces energy consumption in the preparation process, saves cost, and the prepared catalyst has high catalytic activity and stability.

A coating composition comprising at least one film forming component including a water-based carrier, a resin and at least one additive where the coating composition does not contain a high volatile organic compound (VOC) content and the resin is present in an amount sufficient and configured to form a conformal film when applied to a substrate at room temperature is disclosed. A conformal coating, a method of making the coating composition, a method of using the coating composition to protect substrates such as electronic devices including printed circuit board assemblies (PCBAs), from unwanted contaminants. Substrates coated with such conformal coatings are also disclosed.

This invention discloses a volatile organic compound (VOC) waste gas treatment device, comprising a reactor (1), which contains, from top to bottom, a demister (5), a spray layer (6), a waste gas injection frame (7), and an ozone microbubble membrane catalytic reaction unit (8). The reactor (1) has a solution zone (1a) at the bottom and a tail gas outlet (1b) at the top. The waste gas injection frame (7) and the ozone microbubble membrane catalytic reaction unit (8) are both located in the solution zone (1a). The inlet of the dissolved gas pump (2) is connected to the ozone gas source and communicates with the solution zone (1a), and the outlet is connected to the ozone microbubble membrane catalytic reaction unit (8). The inlet of the gas pump (3) is connected to the waste gas source, and the outlet is connected to the waste gas injection frame (7). The inlet of the delivery pump (4) is connected to the solution zone (1a), and the outlet is connected to the spray layer (6). The advantages of this invention are improved waste gas purification effect, higher ozone utilization rate, and reduced risk of secondary pollution caused by ozone.

The present application aims to provide an effect pigment preparation which does not require heating when mixing raw materials, is compatible with a thermoplastic resin, a thermoplastic resin composition containing the effect pigment preparation, and a method for producing a paint or ink containing the effect pigment preparation. According to the present application, there is provided a method for producing an effect pigment preparation, a thermoplastic resin composition containing the effect pigment preparation, and a paint or ink containing the effect pigment preparation, the effect pigment preparation being characterized by containing, in total, 99 mass% or more of an effect pigment and a polyalphaolefin (PAO), the PAO being liquid at 40°C, and, with respect to the effect pigment preparation, the effect pigment being 75 mass% or more and 95 mass% or less, the PAO being 5 mass% or more and 25 mass% or less, and a volatile organic compound being 1 mass% or less.

The application relates to a preparation method of a rare earth high-entropy catalyst for photocatalytic degradation of VOCs, and relates to a catalyst preparation method for catalytic degradation of VOCs. The method has important research necessity for catalytic degradation of VOCs by introducing a multi-element synergistic regulation strategy. The application is applied to promoting catalytic oxidation and decomposition of volatile organic compounds (VOCs). A series of xMnHEOs-K catalysts are prepared by a co-precipitation one-step synthesis method, KMnO4 is doped into rare earth oxides, and the xMnHEOs-K catalysts are obtained through filtration, washing, drying and calcination. The xMnHEOs-K catalysts can realize photocatalytic oxidation and decomposition of VOCs at a low temperature, and have excellent stability and water resistance in toluene, acetone and multi-component VOCs.

The disclosure provides for coalescent agents having low VOC formed using alcohol initiators with ethylene oxide groups in an alkoxylation process. The coalescent agents are used in an aqueous coating composition that includes a binder; water and the coalescent agent represented by Formula (I). For the coalescent agent of Formula I, R1 is a linear C6-C16 alkyl or a branched C6-C16 alkyl, R2 is independently a methyl or an ethyl; x has an average value of 0 to 10; y has an average value of 0.25 to 5;z has an average value of 3 to 20; a ratio of y / z is from 0.01 to 0.5.

The application discloses a kind of organic silicon waste gas multistage collaborative management method and system, the method includes: S1: the organic silicon production waste gas is guided into balance bin and carries out airflow balance and pressure stability control;S2: after dust removal, waste gas is sequentially introduced into first-stage cooling heat exchanger, second-stage condenser and third-stage deep freezer, and high-boiling siloxane, chloromethane and condensable volatile organic compounds are recovered by fractional condensation;S3: after deep cooling, non-condensable gas is introduced into pressure swing adsorption unit, and residual chloromethane is adsorbed and enriched, S4: after pressure swing adsorption, gas is introduced into acid removal and resource utilization unit;S5: after demisting and dewatering, gas enters hydrophobic zeolite rotary wheel for adsorption and concentration, and the obtained high-concentration desorption gas enters regenerative catalytic combustion reactor for catalytic oxidation treatment.The application improves the segmented treatment and resource recovery effect of chlorine-containing components in organic silicon waste gas through the synergistic cooperation of steady flow dust removal, fractional condensation, adsorption reflux, acid removal and resource utilization, adsorption concentration and catalytic oxidation.

Nanocomposites comprising nanoparticles, small molecules, and block copolymer (BCP)-based supramolecules are provided. The nanoparticles, small molecules, and BCP-based supramolecules self-assemble into a plurality of nanosheets that form a multilayer nanocomposite. The nanoparticles, small molecules, and BCP-based supramolecules can be Zr02, 3-pentadecylphenol (PDP), polystyrene-b-poly(4-vinylpyridine) block copolymer (PDP) 1, respectively. b A method of producing a nanocomposite by contacting nanoparticles, small molecules, and BCP-based supramolecules with a solvent and drying to remove the solvent to allow self-assembly is also provided. The nanocomposites provided herein can be used as a barrier material against volatile organic compounds, water, oxygen, or electrons, and can be used as a coating on various substrates and as a packaging material, or as an optical material.

The present application relates to the field of environmental science and air pollution control technology, and discloses a method and device for dynamically estimating and quantifying the emission of volatile organic compounds of gas stations, which is based on the data of volatile organic compound emissions of gas stations and multi-source environmental data to construct data sets, input each data set into the corresponding initial prediction model to train the target prediction model, and calculate the single station emission prediction value through the target model; then, based on all single station prediction values, the input data error and model structure uncertainty are integrated and quantified, and finally the total emission of all gas stations and the corresponding uncertainty interval are calculated to realize the accurate prediction of the emission and the systematic quantification of the uncertainty, wherein through the multi-model training and uncertainty quantification, the present application not only realizes the accurate prediction of the emission of volatile organic compounds of gas stations and the calculation of the total emission, but also outputs the total emission uncertainty interval with reliable confidence level and quantifies the fluctuation risk of the prediction result.

The application discloses an array material and a method for detecting VOCs components in gas, and the array material is obtained through the following steps: step 1: each dye is respectively dissolved in an ethanol solution to obtain a dye reagent; the concentration of the ethanol solution is 50%; step 2: polyvinylidene fluoride film is selected as a substrate, the dye reagent obtained in step 1 is separately and individually added on the polyvinylidene fluoride film to form a plurality of dye detection points and form a detection array; then a sealing film is covered above and below the polyvinylidene fluoride film, the polyvinylidene fluoride film is sealed, and an air inlet hole and an air outlet hole are respectively formed above and below the sealing film and correspond to the positions of each dye detection point; nitrogen is slowly blown to the polyvinylidene fluoride film to obtain the array material. According to the method, the array material constructed in the application can clearly distinguish a plurality of volatile organic compounds through visual results or pattern recognition, and the recognition accuracy is high.

The application relates to the technical field of building, and discloses indoor sound insulation and antibacterial coating, which is applied to the surface of a building wall base layer and comprises, from inside to outside, a high-permeability alkali-resistant sealing primer layer, a porous composite sound-absorbing middle layer for gap friction attenuation of sound waves, an antibacterial agent slow-release depot layer for providing long-acting antibacterial active substances, and a photocatalytic sterilization and purification layer. The composite coating system of the application resolves the technical problems of easy agglomeration of sound-absorbing fillers and nanometer antibacterial agents in direct blending in traditional processes and mutual hindering of the effects by scientifically constructing a multi-dimensional functional layered system. The system not only realizes excellent broadband sound insulation and noise reduction effects by virtue of the composite acoustic structure of quality reflection, porous dissipation and damping heat conversion, but also combines the double-effect biochemical mechanisms of deep ion slow release and surface photocatalysis to ensure long-acting broad-spectrum sterilization and decomposition of volatile organic compounds.

This invention discloses a device and method for controlling the source of breathing gas from solvent storage tanks, belonging to the field of volatile organic compound (VOC) pollution control technology. The device includes at least two solvent storage tanks, an automatic foam ball dosing system, a gas phase connection pipeline, and a variable-volume airbag. The automatic foam ball dosing system adds foam balls to the liquid surface of each solvent storage tank, forming a liquid surface covering layer. The gas phase spaces of each solvent storage tank are interconnected through the gas phase connection pipeline, forming a gas phase balance system. The variable-volume airbag is connected to the gas phase connection pipeline or the gas phase space of one of the solvent storage tanks to collect and store breathing gas. The method of this invention reduces the liquid phase evaporation area by covering the liquid surface with foam balls, combines multi-tank series gas phase connection to balance the breathing gas between tanks, reduces gas phase emissions, and uses a variable-volume airbag to buffer and reuse the breathing gas, achieving full-process source control and near-zero emissions of breathing gas. It features low investment and operating costs and significant pollution control effects.

This invention relates to the field of industrial safety monitoring technology, and discloses a detection method and system for predicting volatile organic compound (VOC) leaks. The method includes acquiring gas response voltage signals and wind field data; performing preprocessing, error compensation, and spatial interpolation calculations on the gas response voltage signals to obtain a gas concentration distribution map; performing inverse deduction based on the wind field data and the gas concentration distribution map to obtain potential leak coordinates; performing forward deduction based on the potential leak coordinates and meteorological data to obtain the leak path, and mapping and extracting sensitive target entities to obtain a control sequence; and performing runaway diagnosis based on the control sequence and operating condition data to generate alarm commands. This method can achieve high-precision source tracing and location, and proactive early warning and control of VOC leaks.

The utility model discloses a volatile organic compound waste gas catalytic oxidation reaction device of low resistance belongs to waste gas treatment technical field, and it includes: the installation bottom plate, the top fixed mounting of installation bottom plate has the fixed shell, the lower inner wall fixed mounting of fixed shell has the absorption box, the top of absorption box is opened and is connected the mouth, the lateral wall of absorption box and the top fixed mounting of installation bottom plate all have the gas duct, reaction device, including the fixed frame of fixed connection in the inner wall of fixed shell, the inner wall of fixed frame is slidably installed with catalytic board, and the fixed mouth is opened to catalytic board, and the inner wall of fixed frame is slidably connected with fixed scraper. The utility model can clean the water on catalytic board through the scraper, and cooperate the up and down vibration of catalytic board, thereby just love that catalytic board surface water is cleaned thoroughly, avoids catalytic board to be covered with water, leads to the takeoff and cannot fully contact with catalytic class, and the speed of waste gas decomposition is accelerated.

The application belongs to the technical field of sampling devices and discloses a waste gas volatile organic compound sampling device, which comprises a mobile trolley, a collection box is fixed on the mobile trolley, a collection hose fixed with the collection box is arranged through the collection box, the upper end of the collection hose penetrates through the top of the collection box and is slidably connected, a plurality of sliding grooves are formed in the inner wall of the collection box, a sliding block is slidably connected in the sliding groove, a limiting column is rotatably connected to the sliding block, a spring is fixed between the sliding block and the sliding groove, the number of the sliding grooves, the number of the sliding blocks, the number of the limiting columns and the number of the springs are equal and one-to-one corresponding, the collection hose passes through the sidewalls of the plurality of limiting columns in sequence, the upper end of the collection hose is rotatably connected with a collection head, and a collection mechanism is arranged on the collection box. The arrangement of the sliding block, the limiting column and the spring avoids the situation that the collection hose falls off when the device moves, and facilitates the use of the device.

The present invention relates to a pretreatment method for detecting volatile organic compounds in a biological sample. When a biological sample is pretreated using the method according to one aspect and volatile organic compounds in the pretreated sample are analyzed, it is possible to achieve sensitivity increase and uniformity of a matrix effect by only a simple step without the need to perform a complicated pretreatment step that is conventionally performed to increase analysis sensitivity. That is, the concentration of volatile organic compounds in a biological sample can be accurately measured with greater simplicity, thus reducing time, effort, and cost, and being very economical. In addition, the pretreatment method according to one aspect involves a simple process and enables accurate detection of the compounds thereafter, and thus can be used for monitoring research on in vivo exposure to volatile organic compounds.

The utility model provides a volatile organic compound waste gas integrated type processing equipment, including the square section tower body, its inside is divided into at least two stage absorption units along the length direction, is communicated in series through the built -in air duct between adjacent absorption units, is equipped with the waste gas import with the waste gas import opposite side wall upper portion is equipped with the waste gas export every absorption unit's side wall lower part, the bottom end of air duct communicates the waste gas import of downstream absorption unit, its top end communicates the waste gas export of upstream absorption unit, the lower end of every absorption unit is horizontally provided with the air distribution plate, is set up a plurality of regular arrangement's air hole on the air distribution plate, and the air hole porosity of air distribution plate increases along the waste gas import to the opposite side direction gradient. The utility model designs the square section structure to the traditional cylindrical tower body, through the height intensive design of function unit, not only can significantly reduce equipment overall floor space, but also can realize integral factory prefabrication and standardization production, effectively avoids the installation error on site.

A mechanism for monitoring cannabis and predicting or determining a harvesting time. A sensing arrangement generates a temporal sequence of VOC values, each representing a measured amount of a first set of one or more volatile organic compounds (VOCs) in the air surrounding some cannabis. This temporal sequence is then processed to determine a harvesting time, at which the cannabis is ready for harvesting (e.g., meets some predetermined criteria for achieving a harvesting goal).

The application relates to the field of soil pollution detection, and discloses a detection system and a detection method for volatile organic compounds in soil. The first detection rod and the second detection rod are arranged to detect the gas in the soil on the spot, which has very high timeliness compared with the prior art, that is, the detection result can be quickly obtained, which provides a reference for the removal of the volatile organic compounds in the soil. The first detection rod performs preliminary detection to preliminarily determine whether the volatile organic compound gas exists at the sampling position, and the outer pipe is used to introduce the carrier gas into the inner pipe, which plays a role in dredging the inner pipe and also assists in blowing the volatile organic compound gas carried in the sampling soil, improves the sensitivity of detection, promotes continuous operation, quickly determines the depth of secondary detection, and combines the arrangement of the second detection rod to blow the carrier gas into the second detection rod, promotes the volatile organic compound gas to flow to the second detection rod, improves the accuracy of gas concentration detection, and reduces the generation of the plugging problem.

The application discloses a volatile organic compound real-time tracing method and system for an industrial park, which comprises the following steps: acquiring VOCs component spectrum and three-dimensional meteorological field data in real time by using proton transfer time-of-flight mass spectrometry and Doppler laser radar, and aligning and fusing the VOCs component spectrum and three-dimensional meteorological field data with enterprise process data through a space-time alignment algorithm; constructing a time convolution network and embedding a chemical mechanism module for constraint to obtain a TCN-MCM hybrid model, and training data loss and mechanism loss jointly through the TCN-MCM hybrid model; deploying an INT8 quantization model on a Jetson AGX Xavier platform, and performing efficient inference and uncertainty quantization through dynamic scheduling of computing power and a Monte Carlo method; establishing a transfer learning parameter library, aligning source domain and target domain feature distributions based on a maximum mean difference loss, and establishing a parameter sharing mechanism to realize rapid deployment across parks; and the scheme can significantly improve tracing accuracy and real-time performance, reduce cross-scene deployment costs, and is suitable for precise pollution control in complex industrial environments.