48 results about "Chemical risk" patented technology

The invention provides a temperature and humidity adjusting device for a chemical fire explosion safety test chamber system. The device provided by the invention comprises a temperature adjusting device and a humidity adjusting device. According to the chemical fire explosion safety test chamber system with the temperature and humidity adjusting device, harms of a runaway reaction, combustion explosion, decomposable explosion and the like which are generated during the process of large-scale chemical risk assessment test are eliminated, and simultaneously, effluents, exhaust gas and waste residues that are generated during collection test process undergo centralized processing. Inherent safety of the fire explosion risk test process is raised, and the effect of reducing environmental pollution is also achieved.

The invention discloses an ecological risk evaluating method of an urban system. The method comprises the following steps of: (S1) acquiring year-by-year data information of an urban area to be researched and determining a pollutant used as a chemical risk source; (S2) establishing a class III multi-media fugacity / equivalent concentration model; (S3) estimating according to the year-by-year data information to obtain a model parameter and substituting the model parameter into the model to obtain a calculating value of pollutant concentration; (S4) obtaining a predicted value of the model parameter in a researched time segment according to the obtained year-by-year model parameter; (S5) substituting the model parameter predicted value into the model to obtain a pollutant concentration predicted value; and (S6) acquiring a predicted value of urban ecological risks brought by chemical pollutions. The ecological risk evaluating method of an urban system obtains the predicted values of time sequences and space distribution based on past and current ecological risk change conditions, serves for an implementation process of urban ecological planning and is helpful to formulating and implementing more scientific and reasonable urban ecological planning.

The technical scheme of the invention discloses a forecasting, early warning and emergency controlling method for a plurality of fixed chemical risk sources. The method adopts a calculation system and a display system, wherein the display system is constructed on a GIS platform; and the calculation system comprises a meteorological field numerical forecasting system, a toxicant database and a risk source database. The invention adopts the technical scheme that: real-time observation data of a meteorological observation network in the area of a protected target and a meteorological numerical forecasting result are subjected to data assimilation, and are output to a diffusion adjoint mode to solve the spatial and temporal distribution of an adjoint variable and calculate a risk function so as to acquire the risk degree of a plurality of chemical risk sources on the position of the protected target and determine the early warning levels of the plurality of fixed chemical risk sources and issue the levels through the display system. The technical scheme can acquire the risk degree distribution of all chemical risk sources by only calculation once, and provides the forecasting and early warning data of the risk sources in real time, so that a decision maker can adopt corresponding control measures, organize and prepare emergency forces to carry out emergency control.

The technical scheme discloses an optimized layout method of multiple chemical risk sources, which comprises the following steps of: computing the potential hazard, i.e. the risk level of the chemical risk sources by utilizing a poisonous gas diffusion mode, computing the gradient of controlled variables comprising chemical risk source position coordinates related to a site selection cost function containing land price cost, traffic cost and a penalty function through an accompanied mode, and computing the optimized layout of the chemical risk sources by applying gradient information iteration, i.e. adjusting the positions of the chemical risk sources by utilizing gradient information, and gradually iterating until the cost function is decreased to a minimal value, thereby not only avoiding that a protected object is seriously threatened by the chemical risk sources, but also enabling the economic cost of the chemical risk source layout to be minimal.

The invention discloses a novel method for combined usage of Corbicula fluminea and Limnodrilus hoffmeisteri in inhibition of release of endogenous phosphorus in a closed water body. The method comprises the following steps: 1) adding Limnodrilus hoffmeisteri into sediment; 2) adding Corbicula fluminea in 2 to 3 days; and 3) detecting the concentration of phosphorus in water in each ten days until the concentration of phosphorus is stable. According to the invention, resources are saved, new chemical risks are prevented from being introduced into the water body, the purpose of control of release of endogenous phosphorus is realized, and the landscape function of the water body is prevented from being destroyed in the process of restoration of the water body.

The invention provides a chemical fire explosion safety test chamber system. The chemical fire explosion safety test chamber system comprises a test chamber body, a fire extinguishing and fighting device, a temperature and humidity regulating device, a gas replacement device, a test monitoring and controlling device and a main control device. The chemical fire explosion safety test chamber system eliminates harm on runaway reaction, combustion explosion, decomposition explosion and the like which are generated in the large-scale chemical risk assessment test process, meanwhile treats waste liquids, waste gases and waste residues which are generated in the collection test process in a centralized manner, and plays a role of alleviating environmental pollution as well as improving the intrinsic safety of the fire disaster explosion risk testing process.

The invention relates to an optimization control method specific to hazardous accidents of chemical risk source, which belongs to the control field of the chemical risk source. The invention providesa quantitative analysis control method for the hazardous accidents of chemical risk source through the following steps: designating an evacuation region and a guarding region, determining the time ofprotection implementation and protection clear, optimizing evacuation routes, developing an emergency decontamination plan, making a casualty forecast, formulating a medical treatment program, and thelike. When an accident occurs, the harmful level of the accidents can be restricted to the minimum through the optimization control method.

The invention discloses a chemical dangerous process risk intelligent monitoring method, comprising the following steps of grouping and purifying the historical data under all chemical dangerous processes to serve as a historical process data sequence; extracting a historical risk level under a chemical risk process, carrying out feature coding on the historical risk level, training a model of a corresponding relation between a historical process data sequence and historical risk level feature coding, listing a modeling formula, and calculating a risk assessment formula; obtaining the data ofthe chemical dangerous process parameters in the actual production of the chemical industry again, and calculating the feature codes of the corresponding risk levels according to a risk assessment formula; and establishing a risk level query module, inputting the calculated feature codes into the query module, and calculating the risk level in actual chemical production. According to the invention, various risk measures are monitored in real time, the risk can be monitored in real time, the risk level can be intelligently analyzed, and the appropriate supplementary suggestion measures and thewarning information are given, so that the implementation risk of the whole project is reduced.

The invention discloses a high-throughput screening method for 200 chemical risk substances in a toy. The method comprises the following steps of (1) establishing an accurate quality database and a mass spectrometer library of 200 chemical risk substances to be tested; and (2) adopting an ultra-high performance liquid chromatography-quadrupole-time-of-flight mass spectrometry detection method to carry out screening of an actual sample, carrying out comparative analysis on a result and the accurate quality database and the mass spectrometer library of an established compound to be tested, comprehensively computing a comparison result, and when the comprehensive score is greater than 70%, determining that the compound to be tested is screened and detected in the actual sample. The method issimple, rapid and feasible, and can be used for high-throughput screening of the chemical risk substances in toy products.

The invention discloses a method for screening chemical risk substances such as chloramphenicol antibiotics in toiletries. The method comprises (1) establishing an accurate mass database and a mass spectral database of compounds to be detected, (2) pre-treating a toiletry sample through extraction, centrifugation, purification and filtration, and carrying out high-pressure liquid chromatography-quadrupole-electrostatic field orbitrap high resolution mass spectrometry analysis detection on the sample solution, and (3) comparing and analyzing the test result in the step (2) and the built accurate mass database and mass spectral database in the step (1) and carrying out chemical risk substance screening. The method has high accuracy, strong specificity and high sensitivity and can be appliedto daily detection and quality control of the toiletries.

The invention relates to a transportation route optimizing method of a moving chemical risk source aiming at a protected object, which belongs to the field of control of risk sources. The method can optimize a transportation route of a moving chemical risk source based on a genetic algorithm according to the risk degree of the moving risk chemical source on the protected object and effectively improve the transportation efficiency when effectively reducing a chemical risk.

The invention provides a safety test chamber for a chemical fire explosion safety test chamber system. The wall of the safety test chamber comprises five layers which comprise an inner sacrificial layer, an inner buffer layer, a test chamber wall, a thermal insulating layer and an outer cladding layer from the interior to exterior. According to the chemical fire explosion safety test chamber system with the safety test chamber, the hazards in the aspects such as uncontrolled reaction, combustion explosion and explosive decomposition in the large-scale chemical risk assessment test process are eliminated, liquid waste, waste gases and waste residues produced in the test process are collected to be treated in a centralized manner, the intrinsic safety in the fire explosion risk test process is improved, and the effect of reducing the environmental pollution is achieved.

The invention provides a temperature and humidity regulating device for a chemical fire explosion safety test cabin system. The temperature and humidity regulating device comprises a temperature regulating device and a humidity regulating device. According to the chemical fire explosion safety test cabin system provided with the temperature and humidity regulating device, harm of the aspects such as uncontrolled reaction, combustion explosions and decomposable explosions generated in the process of a large-scale chemical risk assessment test can be eliminated, waste liquid, waste gas and waste residues produced in the test process are collected to be processed in a centralized mode, and the temperature and humidity regulating device improves the intrinsic safety of the fire explosion dangerousness test process, and also plays a role in reducing environmental pollution.

The invention provides a device for quickly opening a door in a chemical fire explosion safety test chamber, wherein the device for quickly opening the door is formed by two half hoop structures; a chemical fire explosion safety test chamber system using the device for quickly opening the door is capable of removing damage due to runaway reaction, combustion explosion and decomposable explosion in a large-scale chemical risk assessing and testing process, collecting waste liquid, waste gas and waste residue generated in the testing process and intensively treating the waste liquid, the waste gas and the waste residue, thus improving the essential safety in the fire explosion risk testing process and playing a role of reducing the environmental pollution.

The invention relates to a terahertz self-feedback system for detecting hazardous chemicals in atmosphere. The system comprises a detection device, a mechanical adjusting device, a processor and a movable carrying device; the detection device is used for detecting kind and concentration information of hazardous chemicals in atmosphere; the mechanical adjusting device is used for adjusting positionof the detection device; the processer is used for processing kind and concentration information of the hazardous chemicals in atmosphere which are detected by the detection device, and controlling the mechanical adjusting device and the movable carrying device, and the movable carrying device is used for carrying movement of the hazardous chemicals in atmosphere of the system for detecting hazardous chemicals in atmosphere in a space; one end of the mechanical adjusting device is connected to the carrying device, and the other end is connected to the detection device. The self-feedback system has the advantages of high adjustability of detection positions, high intentionality of detection space coordinates, and low repetition rate.

The invention relates to the field of public health, in particular to chemical risk assessment, and particularly relates to a physiological poison metabolism kinetic model for adults orally exposed toDEHP. The construction method of the model comprises the following steps: S1, determining a kinetic process of absorption, distribution, metabolism and excretion of DEHP ingested orally in a human body; S2, determining a physiological poison metabolism kinetic model structure of an adult orally exposed to DEHP; S3, establishing a mathematical model, and compiling a differential equation; S4, acquiring human physiological parameters, DEHP biochemical parameters and DEHP toxicokinetic parameters; S5, simulating a physiological poison metabolism kinetic model of DEHP and optimizing parameters. The model and the method disclosed by the invention are helpful to establish DEHP internal and external exposure association of a human body, simulate the content level of DEHP in a target organ, and further clarify an effect mechanism and a dose-reaction relation of DEHP in combination with an effect index of DEHP; therefore, the health risk that people are orally exposed to DEHP can be evaluatedmore accurately, and important scientific basic data are provided for making and correcting DEHP limit values.

The invention relates to the field of public health, particularly relates to chemical risk assessment, and especially relates to a physiological poison metabolism kinetic model for adults exposed to bisphenol A through mouths. The construction method of the model comprises the following steps: S1, determining a kinetic process of absorption, distribution, metabolism and excretion of the bisphenolA orally taken in a human body; S2, determining a physiological poison metabolism kinetic model structure of the adults exposed to bisphenol A through the mouths; S3, establishing a mathematical model, and compiling a differential equation; S4, acquiring human physiological parameters, bisphenol A biochemical parameters and bisphenol A toxicokinetic parameters; and S5, carrying out simulation andparameter optimization on the physiological poison metabolism kinetic model of the bisphenol A. The model and the method disclosed by the invention are helpful to establish bisphenol A internal and external exposure association of the human body, simulate the content level of bisphenol A in a target organ, and further clarify an effect mechanism and a dose-reaction relationship of the bisphenol Ain combination with an effect index of the bisphenol A, so that the health risk that people are exposed to bisphenol A through the mouths can be evaluated more accurately, and important scientific basic data are provided for making and correcting bisphenol A limit values.

The invention discloses a chemical estrogen receptor activation activity prediction model and a screening method. The establishment method of the chemical estrogen receptor activation activity prediction model comprises the steps of obtaining chemical data of known estrogen receptor activation activity, and the chemical data comprises SMILES codes of chemicals; converting the SMILES code to obtain an M * N digital matrix; dividing the obtained data of the known chemicals into a training set and a verification set, and constructing a convolutional neural network model taking an SMILES digital matrix as input; and training the convolutional neural network model by using the training set, and determining an optimal hyper-parameter of the convolutional neural network model by using the verification set to obtain an optimal convolutional neural network model. The method is suitable for screening the estrogen activation activity of large-scale chemicals, is simple, rapid and efficient, and has a wide application prospect in the fields of chemical risk evaluation, environmental safety evaluation and the like.

The invention discloses a chemical device risk assessment method based on OWA operator empowerment, and the method comprises: obtaining a first-stage risk factor index and a second-stage risk factor index of a process device evaluation risk factor according to the analysis of a chemical risk factor; evaluating the influence degree of the first-level risk factor indexes, and correspondingly giving a first-level decision data set of each first-level risk factor index; sorting and numbering each primary decision data set, and calculating each weighted vector, absolute weight value and relative weight value in each primary decision data set; evaluating the secondary risk factor index influence degree of the risk factor index subdivision, and correspondingly giving each secondary decision data set of the secondary risk factor index; sorting and numbering each secondary decision data set, and calculating each weighted vector, absolute weight value and relative weight value in each secondary decision data set; and calculating the weight value of the second-level risk factor index by using the relative weight value of each first-level risk factor index and the relative weight value of the corresponding second-level risk factor index.

The invention discloses a material for rapidly eliminating black and odor of a water body and a preparation method of the material. The preparation method comprises the following steps: step 1, filtering water purification sludge by using an iron screen, carrying out drying, grinding and sieving to obtain water purification sludge, and firing the water purification sludge to obtained fired water purification sludge; and step 2, mixing calcium peroxide powder, the fired water purification sludge and ferrous sulfate heptahydrate to prepare the mixed material. A dry feeding mode is adopted; whenthe concentration of suspended solids is less than or equal to 200 mg / L, the feeding amount is 10-15 g / m<3>; when the concentration of suspended solids is greater than 200 mg / L and less than or equalto 500 mg / L, the feeding amount is 20-25 g / m<3>; and when the concentration of suspended solids is larger than 500 mg / L, the feeding amount is 40-50 g / m<3>. The material has the characteristics of relatively strong oxygen supply capacity, high sedimentation speed and high oxidation capacity, has capability of improving the microenvironment of bottom mud, and is beneficial to promoting recovery ofmicroorganisms in the bottom mud. After the material is immersed into the bottom mud, no new chemical risk is introduced.

The invention provides an interlocking logic control system which is arranged on a main control device and used for controlling operation of devices in a safety test cabin, and therefore a whole fire explosion safety test process is achieved. According to a chemical fire explosion safety test cabin system with the interlocking logic control system, out-of-control reaction, combustion explosion, decomposition explosion and other dangers generated in a large-scale chemical risk assessment test process are eliminated, waste liquid, waste gas and waste residues generated in the test process are collected at the same time for centralized processing, intrinsic safety of the fire explosion risk test process is improved, and environment pollution is lowered.

The invention provides a method for evaluating fire risk classification management of chemicals in a storage process, relates to the technical field of chemical risk measurement, and solves the technical problems that fire risk classification of chemical storage is not clear and a classification inspection method is lacked. The method comprises the following specific steps: screening dangerousness, judging the explosiveness, oxidability and self-reactivity of chemicals, and determining the water-encountering characteristics of the chemicals; determining the danger degree of the chemicals through an identification test; classifying according to the combustibility, explosiveness and oxidability of the chemicals, and determining the category and level of dangers; and storing and managing the chemicals according to the danger categories and levels. According to the method, the fire risk classification of various chemicals is defined, the classification accuracy is guaranteed through tests, the chemicals can be inspected, the fire risk classification process of chemical storage is supplemented, and the method has practical guiding significance on fire risk classification of chemical storage.

The invention belongs to the technical field of data analysis, and particularly relates to a chemical risk evaluation method based on semi-quantitative calculation, which comprises the following steps: step 1, making a grade according to three factors influencing the chemical risk; step 2, endowing quantity values on the basis of a system method and enterprise experience according to the three factors; step 3, analyzing risk to acquire main risk events of chemical risks; step 4, calculating a risk value; and step 5, evaluating the grade of the risk according to the risk value. In the file of the invention, a semi-quantitative calculation method is adopted to calculate and evaluate the chemical risk, so that compared with calculation by adopting big data in the prior art, the calculation steps are reduced, and the risk evaluation purpose can be realized only by setting the grade according to the risk; and authenticity of data is improved.

The invention relates to the field of food safety, in particular to chemical risk assessment and extraction of internal and external exposure association, and particularly relates to a physiological poison metabolism kinetic model construction method for rat oral exposure to 3-MCPD. The invention discloses a method for constructing a physiological toxicokinetic model of 3-MCPD of a rat. The method comprises the following steps: determining a kinetic process of absorption, distribution, metabolism and excretion of 3-MCPD ingested orally in the rat; the method comprises the following steps: determining a physiological toxicokinetic model of the rat exposed to 3-MCPD through the mouth, and determining an atrioventricular composition structure of the model; establishing a mathematical model, and compiling a differential equation; the method comprises the following steps: collecting physiological parameters of a rat, biochemical parameters of 3-MCPD and toxicokinetic parameters of 3-MCPD; obtaining rat 3-MCPD physiological toxicokinetic model simulation and parameter optimization; and a 3-MCPD daily exposure response relation model is established.

The technical scheme discloses an optimized layout method of multiple chemical risk sources, which comprises the following steps of: computing the potential hazard, i.e. the risk level of the chemical risk sources by utilizing a poisonous gas diffusion mode, computing the gradient of controlled variables comprising chemical risk source position coordinates related to a site selection cost function containing land price cost, traffic cost and a penalty function through an accompanied mode, and computing the optimized layout of the chemical risk sources by applying gradient information iteration, i.e. adjusting the positions of the chemical risk sources by utilizing gradient information, and gradually iterating until the cost function is decreased to a minimal value, thereby not only avoiding that a protected object is seriously threatened by the chemical risk sources, but also enabling the economic cost of the chemical risk source layout to be minimal.

The invention discloses a method for screening chemical risk substances of glucocorticoids in toiletries, comprising the following steps: (1) establishing an accurate mass database and a mass spectrum library of compounds to be tested; (2) pretreatment and detection of actual samples : After pretreatment steps such as extraction, centrifugation, purification, and filtration, the sample solution of the personal care products is subjected to ultra-high pressure liquid chromatography-quadrupole-electrostatic field orbitrap high-resolution mass spectrometry analysis and detection; (3) the step (2 ) The test results obtained are compared with the accurate mass database and mass spectrum library established in step (1), and the screening of glucocorticoid chemical risk substances is carried out. The screening method for glucocorticoid chemical risk substances in the toiletries established by the present invention has high accuracy, strong specificity and high sensitivity, and is applicable to daily detection and quality control of the toiletries.

A chemical risk assessment method for a wood preservative in a wooden toy comprises the following steps of (1) collecting a large number of wooden toy samples, detecting and screening the existence level of the wood preservative in the samples, and comparing and analyzing the content of the wood preservative in the samples according to different sample categories; (2) selecting a sample with relatively high wood preservative content for migration quantity determination; (3) determining an oral contact exposure mode of chemical substances according to the use characteristics of the wooden toy sample, and calculating the exposure amount by applying an exposure model; and (4) evaluating carcinogenic risks and non-carcinogenic risks according to the chemical harmfulness of the substances.

The invention provides an exit-entry chemical risk assessment method and system and a readable storage medium. The method comprises the following steps: acquiring document information of a to-be-assessed target article; obtaining enterprise information, type information, quality information, packaging information, transportation environment information and transportation time information of the target article according to the document information; calculating an environmental hazard assessment score, a health hazard assessment score and a physical hazard assessment score according to the enterprise information, the type information and the quality information; calculating a transportation hazard assessment score according to the type information, the packaging information, the transportation environment information and the transportation time information; and calculating a total risk assessment score of the target cargo according to the environmental hazard assessment score, the health hazard assessment score, the physical hazard assessment score and the transportation hazard assessment score.

The invention relates to a flying and wall-climbing fly-eradicating device by simulating geckoes, spiders and frogs. A series of fly-trapping and fly-killing activities is finished by simulating geckoes, spiders and frogs. The flying and wall-climbing fly-eradicating device comprises an induction system, a flying system, a disinfection system and a discharge system. Flies can be automatically caught only by pressing down a switch. The method for catching flies comprises following basic steps of: designing the induction system through infrared rays generated by flies and vibration of waves around caused during flying, inducting targets; flying or climbing to positions near targets; simulating frogs to catch insects; giving priority to simulating spider's threads; absorbing flies and killing flies and setting free when an accumulated number of flies automatically fly to a designated place; and finally carrying out disinfection. The flying and wall-climbing fly-eradicating device by simulating geckoes, spiders and frogs has following beneficial effects: a fully-automated control system is high in efficiency without manual operation; physical and chemical risks are little; and when a certain amount of flies are killed, comprehensive disinfection is carried out so that safety and sanitation quality is greatly improved.