4168 results about "Toxic gas" patented technology

An oral device for use with a person in which at least one non-toxic gas pulse is delivered to a predetermined location in the mouth via a device conduit. The oral device may be provided as a kit with at least one device for measuring the subject's responses and representing them as feedback to the subject / clinician. A method of creating a gas bolus pulse train, delivering it to a predetermined mouth area, and monitoring the subject's responses to it, is also shown. The oral device and method may be used as a diagnostic tool, or a therapeutic tool, in swallowing or speech rehabilitation of children and adults who have swallowing, speech, salivary, and / or oral sensorimotor impairments.

A combined filter, for removing solid particles and noxious gases from air to be delivered into the cabin of a vehicle, as part of a ventilating, heating and / or air conditioning system, comprises two layers of a non-woven tissue such as polypropylene, between which are deposited activated carbon granules. The two layers of non-woven tissue are interleaved at least partially, so as to trap the granules between them.

The invention discloses a bionic intelligent air purification robot, comprising a vehicle body. A robot head is arranged on the vehicle body; a camera and an illumination lamp are arranged at the front end of the head; an infrared sensor is arranged around the vehicle body; a toxic gas sensor, a particulate matter sensor, a temperature sensor and a humidity sensor are arranged at the two sides of the vehicle body; a universal arm is arranged at the front end of the vehicle body and a dust absorption head is connected with the front end of the universal arm; an air purification filter is arranged at the rear part of the vehicle body; and a nozzle is arranged at the rear end of the head which is internally provided with a control circuit and a language communication circuit board. The bionic intelligent air purification robot has the functions of dust absorption, dust removal, sweeping, sterilization, organic matter decomposition, temperature and humidity sensing and adjusting, toxic gas detection, toxic gas elimination, particulate matter sensing, illumination, free walking, mobile charging, infrared sensing, omnibearing photographing, digital storage, language communication and the like; an intelligent microcomputer is used for control, therefore, the bionic intelligent air purification robot has the advantages of good work effect, stable equipment performance, convenient operation, high efficiency, simple and compact structure, light weight and convenient transportation.

Disclosed is a gas detection system and method using a smart phone. The gas detection system includes a sensor module detachably mounted to the smart phone and configured to detect and measure a combustible gas or a toxic gas; and a gas detection APP installed inside the smart phone and configured to acquire measurement data by detecting the combustible gas or the toxic gas and measuring the detected combustible gas or toxic gas through the drive of the sensor module, after automatically recognizing user information and location information by reading a radio frequency identification (RFID) tag indicating a user or a location of gas detection, using a contact unit having built therein an RFID reader inside the smart phone, wherein the smart phone transmits the user information, the location information and the measurement data acquired from the gas detection APP to an operation server through a communication network.

This invention relates to a method, process and apparatus for disinfecting and sterilizing all types of surfaces contaminated with microorganisms and toxic substances to render both inactive. Furthermore, this invention relates to both a method and apparatus for disinfecting and / or sterilizing breathable air and then using this air to protect a confined space from external contamination. The apparatus consists of a new ultra-violet (NUV) source that is more effective than mercury based 254 nm light for destroying DNA of virus, bacteria, spores and cists. It is most effective in breaking chemical bonds in toxic gases and Biotoxins that are useful to terrorists. It is combined with other apparatus that remove particulates and byproducts sometimes produced by the NUV source and maintains positive pressure of the confined space so as to prevent the influx of air from outside the protected zone.

The present invention relates to an apparatus for effectively purifying and neutralizing toxic gases such as odors, fumes or various volatile organic compounds generated by research laboratories, chemical processing factories or hospitals where medicinal products are handled. The apparatus according to the present invention comprises: a main body having an intake, an exhaust and a control panel; a pre-filter, a first filter, first and second neutralizing pellet beds, and a second filter which are mounted in the apparatus main body and are placed from the intake to the exhaust in that order; and a blower and a driving device placed between the first and second neutralizing pellet beds. The apparatus effectively purifies and neutralizes toxic gases and collects fine particles or dust. Thus, the apparatus helps to maintain health of researchers, people who perform experiments, workers in chemical factories, or medical workers, since the filter and neutralizing pellet bed are configured in a cartridge form, the apparatus is low-maintenance. Also, additional connection of other facilities or pipes is not required. Therefore, the apparatus has high usability due to the independent compact form and function thereof, and can be driven with less noise.

An exhaust gas processing method comprises making exhaust gas, exhausted from a coal burning boiler or an LNG burning boiler, flow through coolant to cool it to such a first temperature as to liquefy or solidify nitrogen oxides or sulfur oxides without solidifying carbon dioxide, thereby liquefying or solidifying nitrogen oxides or sulfur oxides as toxic gas components contained in the exhaust gas to separate them from the exhaust gas; removing moisture contained in the exhaust gas; and cooling the exhaust gas to such a second temperature as to solidify carbon dioxide, thereby solidifying carbon dioxide contained in the exhaust gas to separate it from the exhaust gas.

A multi-layered tube composed of at least two layers, each formed from a different resin, e.g. resin (I) or resin (II). Resin (I) contains 5 to 40 mass % of a polypropylene resin and 95 to 60 mass % of at least one hydrogenated copolymer. Resin (II) contains 45 to 100 mass % of a polypropylene resin and 55 to 0 mass % of a hydrogenated copolymer. The multi-layered tubes may be used in the field of medicine and provide tubing which is excellent in transparency, flexibility and anti-kinking properties, and which is durable during sterilization procedures with high-pressure steam. The multilayer tubing may also be safely disposed of as it generates no toxic gases, such as dioxin, when incinerated. The multilayered tubing has excellent connectability and may be bonded to other tubing using hot solvent bonding or solvent adhesion. The multilayered tubing which is free from generation of any toxic gas when incinerated, and which is excellent in hot solvent bonding or solvent adhesion to other tube.

Systems, methods and devices are provided for collecting operational data at remote oil and natural gas sites, such as wells, and or processing and refinery plants. One such system comprises a remote transmitter and / or controller at the site and an unmanned aerial vehicle (UAV), such as a drone aircraft, configured for aerial dispatch to the remote site and wireless connection to the remote transmitter for subsequent relay or upload of data to an external processor. The UAV may include still or video cameras for collecting images around the well site that can be uploaded and transmitted to the external processor. The system may also include logic-based applications allowing for feedback control of the well site to change operational parameters based on the received data. The system may also include a variety of sophisticated sensor devices on the UAV or located at the remote site to collect additional operational data, such as airborne particulate and / or toxic gas concentrations, audio files of pumps or other equipment and levels and properties of produced water and other fluids.

The invention discloses a fire scene multi-parameter laser wavelength modulation spectrum detection method and a device thereof, wherein, fire smoke products are treated through a smoke pre-treatment device and then pumped into a white cell through an air extracting pump; a multi-channel laser controller scans and modulates the wavelengths of a plurality of DFB lasers according to the time-sharing and multiplexing working mode, and all waves of laser share an optical fiber and are outputted sequentially through a wave combiner, then are aligned by a fiber collimator and sent to the white cell to detect the fire smoke products; a photoelectric detector converts light intensity signals of laser repeatedly reflected and absorbed by the white cell into electrical signals which are sent to two phase-locking magnifier modules for frequency selecting magnification so as to obtain a fundamental frequency component and a second harmonic component; a multi-channel data acquisition card converts output voltage signals of the phase-locking magnifiers into digital signals which are sent to a micro-computer for real-time data processing, so that the fire scene multi-parameter information containing the oxygen concentration of the fire scene, concentrations of various toxic gases and smoke concentration is obtained. The detection method and device can realize real-time on-line monitoring to fire scene multi-parameters, and have the advantages of being real-time, multi-component and highly sensitive, good selectivity of gas, high reliability and strong environmental disturbance resistance ability.

Disclosed herein is a cooling system for vehicle battery packs, including a double filter device mounted at an air inlet part, through which air for cooling the battery pack is introduced from the outside and / or the inside of the vehicle. The double filter includes a pre-filter having relatively large air holes, the pre-filter having high frequency of replacement, and a medium filter having relatively small air holes, the medium filter having low frequency of replacement. The pre-filter is located before the medium filter in the direction in which the air is introduced. Consequently, dust is removed from air, and therefore, the cooling efficiency of the battery pack is increased. In a preferred structure, metal dust is also effectively removed by the magnetic force applied to the medium filter. Consequently, the malfunction or short circuits of the battery pack are prevented. Also, air surrounding the battery pack is directly introduced through the through-type intake ports without passing through any pipe-shaped intake duct. Consequently, generation of noise, which is a problem caused when air in the cabin is used, and backward flow of flames and toxic gas, which are generated during a fire, are prevented. Furthermore, the battery pack is constructed in a compact structure.

The invention discloses a method for preparing a graphene oxide. The method comprises the following steps of: a) adding concentrated inorganic acid into a sealed reactor, adding graphite powder with stirring, reducing the temperature to the temperature of between 0 and 4 DEG C, and adding potassium permanganate to react for 0.5 to 2 hours; b) heating the obtained reaction system to the temperature of between 60 and 70 DEG C, and standing for 12 to 24 hours; c) adding hydrogen peroxide into distilled water in a volume ratio of 1:10, freezing to obtain ice, transferring the graphite oxide to the distilled water containing the hydrogen peroxide until the ice is completely dissolved, uniformly stirring, performing suction filtration, washing and drying to obtain the graphene oxide. The graphite powder, the concentrated acid and the potassium permanganate serve as raw materials, and the raw materials are low in cost and readily available; NO, NO2 and other toxic gases are prevented from being produced; the reaction temperature is as low as 60-70 DEG C; and the product has high dye adsorption capacity and high industrial application value.

A safety system for connection to a toxic gas detector and a toxic gas producing engine, and its operating method, includes an interrupt device coupled to connections to the detector and the engine. The interrupt device includes a toxic gas signal detecting circuit and a circuit for permitting starting of the engine. The detecting circuit activates the permitting circuit if the toxic gas signal represents a toxic gas concentration below a predetermined level. In one embodiment, the permitting circuit is activated if the safety system is healthy and fully functional.Similarly, a safety system for connection to a toxic gas detector and a toxic gas supply, and its operating method, includes an interrupt device coupled to connections to the detector and the toxic gas supply. The interrupt device includes a toxic gas signal detecting circuit and a circuit for permitting of flow from the toxic gas supply. The detecting circuit activates the permitting circuit if the toxic gas signal represents a toxic gas concentration below a predetermined level.

An object of the present invention is to provide a honeycomb structural body for use in a filter, which can be provided with a large amount of catalyst, can suppress an increase in pressure loss upon collecting particulates, can have a high particulate collecting capability and can efficiently carry out a regenerating process and a toxic gas purifying process. The honeycomb structural body of the present invention is a pillar-shaped honeycomb structural body that is mainly composed of inorganic fibers and has a structure in that a large number of through holes are placed in parallel with one another in the length direction with a partition wall interposed therebetween. Herein, the inorganic fibers, which form the honeycomb structural body, are arranged in such a manner that more fibers are aligned along a face perpendicular to the forming direction of the through holes rather than aligned along a face in parallel with the forming direction of the through holes.

The invention discloses a production method for manganese sulfate by using low-grade manganese ores. According to the method, manganese sulfate with high purity can be produced by using waste low-grade manganese ores with manganese content of 10% to 20%, manganese tailing or manganese-containing solid waste residue. The method comprises the steps of preparation of raw materials, a slaking reaction, a leaching reaction, neutralization and purification of leachate, etc. According to the invention, production of manganese sulfate is not restricted by the grade of manganese ores, and low-grade manganese oxide ores with a grade greater than 10%, manganese tailing or manganese-containing solid waste residue can be fully utilized; produced manganese sulfate has high yield and high purity and is a very important industrial fundamental product; almost no external heat supply is needed, low energy consumption is achieved, production cost is low, it does not need to turn over and mix materials in the process of the reactions, the reactions are smooth, no toxic gas is generated, and no environmental pollution is produced; discharge of three wastes (waste gas, waste water and industrial residue) reaches national discharge standards for environmental protection, and there is no dust pollution in a workshop.

The present invention relates to an apparatus for detecting one or more analytes, for example analytes selected from the group comprising nucleic acids, metabolites, peptides, proteins, hormones, pesticides, neurotransmitters, ions in blood, electrolytes, toxic gases, pH and biological warfare agents, the apparatus comprising an insulating substrate, at least one first electrode on the substrate at least one elongate nanostructure extending from and electrically connected to the or each said electrode and extending over the surface of the wafer away from the respective electrode, a passivating layer covering the or each electrode, but not all of said at least one elongate nanostructure, a well crossing the at least one elongate nanostructure extending from the or each electrode and forming a static reservoir for a liquid being investigated for the presence of at least one analyte, a reference electrode provided on said substrate within said well or insertable into said well and respective readout pads electrically connected to the or each electrode and to the reference electrode if the latter is provided on the substrate, the at least one elongate nanostructure being capable of being functionalized for detecting one or more analytes.

The invention discloses a preparation method of a graphene oxide dispersion liquid, and the preparation method comprises the following steps: performing ultrasonic treatment so as to obtain a sulfate-intercalated graphite / sulfuric acid mixture; adding potassium permanganate into the obtained sulfate-intercalated graphite / sulfuric acid mixture for a medium-temperature oxidation reaction to obtain a preliminary graphite oxide; performing a high-temperature hydrolysis reaction to obtain a graphite oxide with a hydrophilic group; adding hydrogen peroxide and continuously performing an oxidation reaction to obtain luminous yellow graphite oxide turbid liquid; centrifuging or filtering to obtain claybank mud-like or cake-like object, and treating with a mixed solution of hydrogen peroxide and concentrated sulfuric acid to obtain graphite oxide with a great quantity of hydrophilic groups; washing and vacuum-drying to obtain pure graphite oxide, adding into a solvent and performing ultrasonic treatment to obtain graphene oxide dispersion liquid. The graphene oxide in the graphene oxide dispersion liquid has good dispersity, good stability and relatively large slice. By adopting the preparation method, the process steps are simplified, and the production cost and energy consumption are reduced; the emission of NO2 / N2O4 toxic gas is avoided in the reaction process, thereby being environment-friendly.

The invention discloses a halogen-free flame retardant thermoplastic engineering plastic composition prepared by in-situ modification, and a preparation method for the halogen-free flame retardant thermoplastic engineering plastic composition. According to the composition, polyester or polyamide is used as a base material, and reactive type halogen-free flame retardant, namely a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) composition is added, so that the halogen-free and flame retardant aims are fulfilled. The invention also discloses the preparation method for the halogen-free flame retardant engineering plastic composition. According to the method, the reactive type flame retardant and end groups or other functional groups of molecular chains of thermoplastic polymer are reacted in the melt blending process, so that the dispersibility and the compatibility between the flame retardant and a material are improved, the using amount of the flame retardant is reduced, the material is excellent in flame retardant property and high in heat resistance, and a large amount of toxic gas and fume can be prevented from being released in the combustion process.

A ventilation system that includes a fan for providing fresh air within an infant's sleeping area. The fan may be mounted to the infant's sleeping device and may include fan guards surrounding the fan for increased safety. The ventilation system may include a sensing device for monitoring the conditions within the infant's sleeping area. The sensing device may monitor the oxygen level, the carbon dioxide level, and the presence of smoke. The sensing device may monitor for additional toxic gasses or hazardous conditions within the infant's sleeping area. The ventilation system may further include a remote receiver that receives signals from the sensing device if a hazardous condition exists within the infant's sleeping area. The ventilation system may further include local and remote alarms configured to provide notification of a hazardous condition within the infant's sleeping area.

An apparatus and method for abating toxic and / or hazardous gas species in a diluent gas stream line deriving from a by-pass line of a semiconductor process tool, comprising contacting the diluent gas stream with a dry resin sorbent material having an affinity for the toxic and / or hazardous gas species to effect the removal of at least a portion of the toxic and / or hazardous gas species by a chemisorbent or physisorbent reaction between the sorbent bed and the toxic gas component effectively reduces the concentration of the toxic gas component in the process diluent stream to below TLV.

The automatic opening and closing window system is characterized by: including a wind detection module, a temperature detection module, a humidity detection module, a smoke detection module, a toxic gas detection module, a rain detection module, a microcontroller, a wireless communication module, a stepping motor drive module, an electromagnetic Valve module, liquid crystal display and key device, sound and light alarm device. It collects indoor and outdoor information, opens and closes the windows according to the conditions of the indoor environment and the outdoor environment, and comprehensively controls the state of the windows by detecting the ambient temperature, toxic gas, wind force and other information.

A method and apparatus for treating raw influent water to remove particles, algae and toxic chemicals from the water. Basically, air is dissolved in recirculated water under high pressure in an air contactor unit, the air saturated water is intimately mixed with the raw, particle bearing, water in a particle mixing system, and the water, particle and air mixture is passed through an air bubble separator wherein bubbles formed when the pressure on air saturated water is reduced carry away toxic gases and particulate material. If desired for further cleaning the water can be sent through a second series of air contactor, particle mixer and air bubble separation, but with a gas comprising ozone to further remove suspended particles and non-volatile dissolved organic matter. In order to improve mixing of the particles and the air saturated water passing through tubes, preferably a pattern of dimples is formed on at least part of the interior wall of the tubes. Upon completion of the process the water is ready for use or for further filtration in a conventional filtration plant.

The invention discloses an explosion-proof and fire fighting reconnaissance robot. The robot comprises two parts including a fire fighting robot body and a remote control box, wherein the fire fighting robot body is composed of a box body assembly, an independent suspension shock absorption system, a fire fighting water cannon, a data acquisition multimedia assembly and an auxiliary part; the box body assembly adopts an explosion-proof design and is provided with a sensor, a camera and the fire fighting water cannon, so that the robot can replace fire fighters to enter inflammable and explosive environments and environments with toxic gas to detect and reconnoiter and can also enter accident scenes with rick smoke, fire disasters and the like to carry out fire fighting; the explosion-proof and fire fighting reconnaissance robot has the characteristics of small size, flexibility of walking, far communication distance, long working time and convenience for operation.

The invention discloses halogen-free flame-retardant rigid polyurethane foamed plastic and a preparation method for the same. The polyurethane foamed plastic consists of the following raw materials in parts by weight: 100 parts of polyalcohol mixture, 105 to 180 parts of polyisocyanate, 20 to 80 parts of compound halogen-free flame retardant, 1 to 50 parts of foaming agent, 1 to 3 parts of composite catalyst, 2 to 4 parts of foam stabilizer and 1 to 2 parts of cross-linking agent. An obtained product is high in flame retardance and environment-friendly, the raw materials are free of halogen, and the production of toxic gas such as hydrogen halide during combustion is avoided; the raw materials are readily available and low in cost, so that the preparation cost of the polyurethane foamed plastic is greatly lowered; the polyurethane foamed plastic also has the characteristic of wide application range, and is applied to cold storage and heat-preservation industries of external wall heat-preservation of buildings, heat-preservation of pipelines, refrigerators, freezers and the like.

The invention provides a preparation method of phosphorous-containing phenol formaldehyde resin. The preparation method comprises the following steps: mixing mixture of two phenols with acidic catalysts and formaldehyde, and increasing the temperature of a reaction system to 50-120 DEG C and reacting for 3-8 hours; 2) adding alcohol for performing etherification reaction, and controlling the etherification temperature to be 100-150 DEG C; 3) adding organic phosphorus compounds, increasing the temperature of the reaction system, and reacting for 2-5 hours. The phosphorous is introduced in a phenol formaldehyde resin and modified to prepare the high-performance phenol formaldehyde resin, the phenol formaldehyde resin is matched with epoxy resin to be used for copper clad plates, and the flame retardation can achieve UL94V-0. The preparation method is simple, and the synthesis pollution is less. The copper clad plate manufactured by the phenol formaldehyde resin can not produce toxic gas in combustion, thereby being incapable of injuring a human body.

The invention discloses a low smoke non-halogen flame-retardant thermoplastic elastomer composite material and a preparation method thereof. The composite material comprises the following raw materials by weight percent: 20-35% of SEBS, 12-20% of paraffin oil, 10-20% of polypropylene, 30-46% of magnesium hydroxide, 3-8% of expansible graphite, 1.0-3.5% of flame-retardant synergist, 1.0-1.8% of lubricant and 0.2-0.4% of antioxidant. The preparation method comprises the following steps: mixing SEBS and paraffin oil, standing to ensure that SEBS is swelled; then placing the swelled SEBS and polypropylene in an open plasticator for mixing, after plasticizing evenly, adding antioxidant, magnesium hydroxide, expansible graphite, flame-retardant synergist and lubricant, mixing evenly to discharge strips, using a flat vulcanizing machine for hot-pressing and chill pressing at room temperature to obtain the finished product. When the composite material of the invention is burnt, low smoke is generated and no molten drop and no toxic gas are produced and the material has good flame resistance and mechanical properties.

The invention provides an flame-retardant and environmentally-friendly polyurethane cable material. The cable material is prepared from the following raw materials, by weight, 20-30 parts of chloroprene rubber, 60-80 parts of a polyurethane thermoplastic elastomer, 8-10 parts of acrylonitrile-butadiene rubber, 8-10 parts of chlorinated paraffin, 0.5-1.0 part of stearic acid, 1-3 parts of barium stearate, 4-6 parts of iron oxide, 0.5-1.0 part of ammonium trimolybdate, 30-50 parts of precipitated silica, 10-13 parts of modified argil, 0.5-1.0 part of capsaicin, 0.1-0.3 parts of an antioxidant AW, 0.5-1.5 parts of a promoter TMTD, 0.2-0.5 parts of sulfur, 8-10 parts of decabromodiphenyl oxide, 12-15 parts of antimony (III) oxide and 6-8 parts of zinc borate hydrate. The cable material has the advantages of excellent flame retardation, very less smoke in combustion, no generation of toxic gases or corrosive gases, good low temperature resistance, good oil resistance, and good abrasion resistance, and the cables processed through using the cable material can prevent the harms of mice and termites and simultaneously have the efficacies of low smoke, environmental protection and flame retardation.

The invention belongs to the field of chemical synthesis, particularly relates to a permanent reinforcement polyurethane material used in a coal mine and a preparation method thereof. The permanent reinforcement of polyurethane material comprises A component and B component, wherein A component contains polyol, a solvent, a catalyst and a fire retardant; and B component is methylene poly[methylene (polyphenyl isocyanate)]. The polyurethane material of the invention has the following advantages: (1) the material of the invention is designed using a formulation, reacts in room temperature, has adjustable curing speed and high induration strength, can bear pressure of over 60mpa, and can improve coal-rock holding power greatly; the raw material liquid has low viscosity, good permeability in coal-rock body and good cohesiveness between the induration and the coal-rock body; (2) the relevant raw materials of the invention are green, pollution-free and volatile solvent-free, does not produce any toxic gas, is harmless to human bodies, and fully meets the operating requirements and environmental requirements for coal-rock body reinforcement; and (3) the material of the invention is filled under pressure with a special double-liquid injection pump, so that the operation is simple and the use is convenient.

The present invention provides combined property, dual-action aqueous and dry compositions for application to a material, such as conventional Gypsum Wall Board, ceiling tiles, joint compounds, concrete and other interior building materials, prior to an exposure of the material to fire, or prior to, during or after exposure of the material to conditions favorable to the growth of microbes, and related methods. When compositions within the present invention are properly applied to a material prior to the material being exposed to fire, or prior to, during or after the material being exposed to conditions favorable to the growth of microbes, these compositions have the effect of reducing the amount of burning that occurs to the material, and / or reducing the amount or density of smoke and associated toxic gases produced by the material, when the material is exposed to fire. These compositions also have the effect of inhibiting or reducing the growth, build-up or deposit of microbes on the material when the material is exposed to conditions favorable to the growth of microbes.