37 results about "Chemical hazard" patented technology

A method and system for detecting chemical or biological hazards in items is provided. A plurality of incoming mail mailboxes each include a sampler to sample air from a letter that is tested using a first sensor. Source information corresponding to hazard flagged mail pieces is utilized to block mail from that source at other mailboxes.

A fluid-borne (e.g., water, air) biological and chemical hazard detection and treatment system can include sensors (e.g., flow rate, contaminant detectors), treatment using ultraviolet laser-emitted light, can be microprocessor controlled and can communicate and be controlled over data networks. Treatment and detection systems can be deployed at various stages along a fluid distribution system, allowing for protection coverage and redundancy. During treatment, fluid enters into and/or passes through a “treatment area” wherein the fluid is subjected to light emanating from a laser at wavelengths within the ultraviolet range. DNA for microorganisms contained within fluid (including blood) are reactive to laser light as they pass through treatment areas and are rendered un-infective. Treatment systems can be staged in close proximity, providing more than one treatment area and associated light sources to a fluid stream. Such staging can provide for concentrated redundancy prior to its delivery to the intended point of use.

The invention discloses a metal complex and its preparation method as well as its application. The metal complex comprises a metal complexant and metal ions. A composition, composed of the metal complex and used for eliminating chemical injuries and chemical hazards, comprises by weight: 0.2-20 parts of metal complex, 1-10 parts of amino acid, 0.1-5 parts of NaC1, 0.1-10 parts of organic acid calcium salt and 0.01-2 parts of bacterial depressant. Non-irritating, non-corrosive and non-allergic to the skin, the composition containing the metal complex is not only used for eliminating hazardous chemicals in the human body, but also used for neutralizing and eliminating leaked hazardous chemicals in the environment.

An exemplary method for the determination and classification of chemical hazards comprises the steps of: specifying physical data corresponding to a chemical material; optionally validating the physical data; and processing the physical data and/or validation data to produce a classification result. Various features and parameters of the present invention may be suitably adapted to optimize or otherwise improve the classification of chemical hazards. The present invention provides for improved response times to chemical spills as well as better management and control of information related to the characterization of hazards and the partitioning of chemical substances into various classification categories.

A first purpose of the present invention is to provide a fuzzy comprehensive evaluation method for safety risks of chemical hazards in a food. The method comprises the following steps: S1, detecting the content of each chemical hazardous substance in the food, determining the evaluation value of each chemical hazardous substance, and constructing an evaluation factor set; S2, establishing a comment set of fuzzy comprehensive evaluation: evaluating the food safety risk by taking the national limit standard MRL of food safety as an evaluation standard and adopting a zero/micro, low, medium, highand ultrahigh five-level scaling method; S3, taking the evaluation value of each chemical hazardous substance in step S1 as a calculation basis, and determining the weight of the multi-level risk factor by adopting an entropy algorithm, wherein the original detection data normalization method in the step S1 is revised by adopting a fixed coefficient method; and S4, calculating the safety risk comprehensive evaluation index FSI of the chemical hazard substances at all levels in the food by adopting a fuzzy comprehensive evaluation technology. The calculation method is objective and unified, and participation of subjective factors is effectively avoided.

An elastomeric matrix impregnated with at least 70% by weight of a high atomic number radiopaque substance, and cured with an organic peroxide, to form carbon-carbon links between elastomer molecular chains. The radiopaque elastomeric matrix may be used to create a flexible, lightweight, carbon-carbon linked, multilaminated protection material against ionizing radiation. The multilaminated protec tion material may include a mechanical reinforcement cloth layer to avoid material expansion or rupture; and additional external elastomeric layers for protection against aging, physical, biological and chemical hazards, as well as allowing mechanical memory of the material and easy cleaning, desinfection and sterilization. These layers are directly merged or incorporated into a single, fused sheet with the radiopaque elastomeric matrix, without the use of glues or adhesives, during a cure and pressure application wherein the elastomer molecules create reticulated carbon-carbon links between the internal and external elastomeric layers and through the pores of the reinforcement layer. The multilaminated material allows production of colored, flexible, lightweight, durable radiation protection articles for medical, dental, and industrial uses.

The invention has the design principle that prediction wind field and turbulence provide basic meteorological information for a prediction precaution system by a meteorology numerical value forecasting system; the prediction precaution system predicts chemical hazard by respectively aiming at a protected target or an accident source; according to the hazard prediction result and a hazard index system, the spatial and temporal distribution of the chemical hazard precaution information is determined; the prediction precaution system is integrated with GIS by a data conversion engine to build a prediction precaution optimal control application system based on the GIS platform; and the optimal control scheme can be determined according to the precaution information to effectively control chemical hazard. The system is suitable for the requirements on the complex environment of battlefields and emergency response fields, and can satisfy the requirements on timeliness, accuracy and intuitionism of chemical hazard prediction precaution and control.

The invention relates to an emergency operation method of a chemical accident, in particular to an emergency operation system of high-risk chemicals, belonging to the technical field of chemical defense. The system of the invention comprises a toxic and harmful substance monitoring analyzer, a weather observation instrument, a data transmission module, a GIS positioning navigation module, a source intensity mode module, a hazard forecast module, a diffusion mode module, a hazard early warning module, a hazard index system, a data conversion engine, a GIS analysis and exhibition module and an emergency command module. In the system of the invention, chemical hazard early warning levels are determined according to a hazard assessment result and the hazard index system; through the data conversion engine, the hazard assessment and GIS are integrated to build the emergency operation system based on a GIS platform; and according to early warning information, emergency control schemes are determined to achieve effective control on the chemical hazard.

To achieve the removal of a broad spectrum of chemical hazards, multiple layers of impregnated activated carbon and nanocrystalline materials are incorporated into the adsorbent bed. For optimum performance using the least amount of material, a two-layer configuration is used. The top layer consists of a homogeneous mixture of an MgO/CaO based nanocrystalline material (e.g., Mg/Ca) and Kureha or other petroleum pitch-based bead shaped activated carbon impregnated treated with phosphoric acid. The bottom layer is comprised of a single layer of Calgon URC carbon. The volume ratios of the components are 9:5:11 Mg/Ca, phosphoric acid treated Kureha carbon, and URC, respectively. The new configuration leads to a 30% reduction in size of the existing NIOSH CBRN CAP 1 cartridge. Other embodiments are disclosed and claimed.

The invention discloses a novel straw composite fuel which comprises the following raw materials in percentage by weight: 30-34 percent of sludge from a sewage treatment plant, 40-50 percent of crop straws, 10-30 percent of pulverized coal and 4-8 percent of coalification agents; and the preparation method of the novel straw composite fuel comprises the following steps of: uniformly smashing the four raw materials, i.e. the sludge from the sewage treatment plant, the crop straw, the pulverized coal and the coalification agent which are mixed, agitating and placing for 5-8 days to prepare formed fuel; and successively baking at a temperature of 100-150 DEG C, converting and air-drying for standby. The novel straw composite fuel has the beneficial effects commonly-used coal and other fuels can be replaced, and the combustion duration of the novel straw composite fuel is 1-2 hours; a heat value not only can be adjusted, but also can raise to 5000-6000 Joule; burnt ash can be degraded, directly taken as a raw material of a fast-acting organic fertilizer, returned to soil and is free from chemical poisoning; the chemical hazard of the sludge leaving the plant is effectively solved, the crop residues are treated, the secondary pollution of the sludge from the sewage treatment plant is solved; and the novel straw composite fuel has the advantages of environment friendliness, high efficiency and energy conservation, is suitable for industrial and civil use, and can be burnt and used in both an ordinary boiler or a heating stove.

The invention discloses a calculation method for simulating toxic and harmful gas diffusion concentration in a three-dimensional virtual training environment. The method comprises the following steps: S1, determining toxic gas diffusion effective influence factors; s2, constructing a physical model corresponding to a training environment, and exporting effective influence factors of gas diffusion; s3, dividing density grids according to the gas poison dose and the size of the shelter, and distinguishing the grid density; s4, constructing a CFD model, and calculating and simulating the harmful gas diffusion concentration; s5, establishing a concentration value time sequence situation result offline database for a period of time, and storing gas concentration situation results; and S6, during training, quickly displaying in the virtual environment. The method can consider the influence of terrain, buildings, weather and the like on gas concentration diffusion, can measure the gas diffusion concentration value at any point in the space in real time, and the diffusion concentration value is vivid and practical, so that the simulation effect of the harmful gas diffusion concentration value in the virtual reality chemical hazard simulation training environment is more real and credible, and the training effect is improved.

The invention relates to a chemical hazard information fusion demonstration system, which comprises 12 functional modules, namely a file management module, a parameter setting module, a scene management module, an equipment management module, a diffusion prediction module, a simulation control module, a data monitoring module, a detection fusion module, a data assimilation module, a situation display module, a source item inversion module and a help module. All the functional modules achieve interconnection and intercommunication through program codes and logic interfaces, and finally two-dimensional simulation demonstration and three-dimensional visual demonstration of chemical hazard information fusion are achieved.

There is described a fiber-optic sensor for measuring a light signal from a fluorescible sample comprising heavy metal ions, for example. The fiber-optic sensor comprises an optical fiber having a side surface by which the light signal from the fluorescible sample is inputted. The optical fiber is corrugated to form at least two gratings on the side surface of the optical fiber. Each grating comprises periodically longitudinally spaced-apart valleys on the surface of the optical fiber, and is longitudinally spaced apart from any other grating of the at least two gratings.

The invention relates to the field of trichosanthes kirilowii Maxim planting, in particular to a trichosanthes kirilowii Maxim earthnut propagation method. The method comprises the following specific steps of 1 earthnut selection, 2 germination, 3 land selection, 4 disinfection 5, shed building, 6 transplanting, 7 topdressing, 8 vine leading, 9 growth period, 10 flowering stage and 11 insect pest prevention. By adopting earthnut propagation, compared with seed propagation, the propagation time is shortened, and meanwhile the cost is lowered; different kinds of vermifuge are applied to different stages, and the pertinence is high; a large amount of organic fertilizer is applied, trichosanthes kirilowii Maxim grows to be fertile and big, and chemical hazards are reduced compared with compound fertilizer.

The invention relates to a method for constructing a liquid quality database for screening chemical harmful substances in milk powder. The method comprises the following steps of (1) pretreatment of base powder/milk powder; (2) detecting components of the milk powder by using liquid chromatography-tandem mass spectrometry (LC-MS), and collecting mass spectrum data; and (3) data acquisition and processing.

The invention relates to the field of biological medicines, in particular to a formula of a plant insecticidal and bactericidal agent. The plant insecticidal and bactericidal agent is prepared from the following components by weight: 5-30 parts of tobacco leaves, 50-75 parts of peach bark or peach leaves, 2-3 parts of an emulsifier, 2-4 parts of copper sulfate and 15-25 parts of auxiliary materials. A preparation method of the plant insecticidal and bactericidal agent comprises the following steps: S1, weighing; S2, cleaning of raw materials; S3, juicing of the tobacco leaves; S4, juicing of the peach bark or peach leaves; S5, extraction, S6, preparation, S7, uniform spraying of the plant insecticidal and bactericidal agent to surfaces of crops by a spraying device. The formula is simpler and more scientific and reasonable, can play a very good role in insect and bacteria killing, contains no chemical hazard ingredients, is harmless to humans and animals, can avoid chemical residues in crops, can be widely used in the insecticidal and bactericidal process of plants and has broad market prospect.

The invention discloses full-automatic intelligent biohazard-free breathing equipment for air disinfection. The equipment comprises a protective cap, an air supply pipe, an air suction pipe and a disinfection and sterilization air supply box, wherein the air supply pipe is fixedly connected to the protective cap; a first connecting pipe is installed on the air supply pipe, and one end of the first connecting pipe is fixedly connected with a first connecting plug; and a plurality of air outlets are formed in the air supply pipe. According to the full-automatic intelligent biohazard-free breathing equipment, air can be disinfected, sterilized and filtered, a safe air isolation layer is formed on the face of a wearer through the air supply pipe and the air suction pipe, the wearer can inhale safe air, air exhaled by the wearer can be inhaled to be disinfected, sterilized and filtered, and certain isolation can be formed between the face of the wearer and the external environment; and the biological harm, the physical harm or the chemical harm of the gas inhaled by a user can be substantially reduced or even eliminated, good protection can be provided for the personnel with poor immunity and resistance, the influence on the environment and the personnel in the environment cannot be caused, and the benefits are provided for people and the others.

The invention relates to a material preprocessing system during a Poly Vinyl Chloride (PVC) extrusion processing, and in particular to a measurement transportation system and a measurement transportation method of a PVC ingredient. The measurement transportation system of the PVC ingredient comprises an ingredient center, a material mixing production line, a storage silo and a conveying production line which are connected in sequence, wherein, the ingredient center, the storage silo and the conveying production line are communicated with a computer control center; the material mixing production line and a material mixing control center control the communication, the computer control center is communicated with the material mixing control center, the computer control center is provided with an alarm system; the invention solves the problems of complex artificial ingredients, material loss and chemical hazards to operators and the like. A high-efficient conveying system operates full-automatically without manpower, thereby, the production efficiency is improved.