496 results about "Contaminated air" patented technology

An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a drive chamber and surrounding annular space. A fan driven by a motor whose shaft extends downward from the drive chamber draws exhaust air from the plenum and blows it up through the annular space to a nozzle at the top of the fan assembly. The motor is pivotally mounted inside the assembly to provide access to the motor components when it is desired to perform inspection and maintenance.

Vacuum break vial assembly and method for reducing the incidence of nosocomial infections, comprising a vial stopper having a 2-part withdrawn-fluid volume compensation assembly having a barbed vent element that secures an apertured needle sheath, a bladder-retainer tube and an expandable/unfoldable bladder. The vial has an aluminum cap holding a plastic flip-off top that removes a central portion of the cap to permit access by hypodermic needle through the stopper into the needle sheath. No pre-pressurization of the vial by ambient contaminated air via the hypodermic can occur. Rather, the needle is inserted in the vial through the stopper and the medicinal fluid withdrawn. Air is inlet into the separate bladder which expands to permit withdrawal of fluid into the hypodermic without vacuum lock. No air having pathogen vectors is introduced into the vial medicinal fluid as the bladder isolates volume-compensating air from the medicinal fluid. Plural embodiments are shown.

A totally integrated ventilation system is contained in the outside air inlet stream. The system samples and controls ventilation airflow as it enters a structure. An air valve connecting the outside air inlet stream to the return plenum is controlled by a valve positioning device and a processor that monitors sensors located in the outside air inlet stream, air quality data provided by a telecommunications link and the HVAC system control signals. The air quality data includes locally broadcast air pollution data or air quality alert data related to accidents or terrorist attacks. The processor and valve positioning device simultaneously control a separate pressure relief valve that allows contaminated air to be exhausted from the structure. An alternate configuration uses a supplemental fan to introduce the outside air inlet stream directly into the structure where HVAC systems are not used. A status and control panel that provides an interface to the occupants or an automation system is provided along with a test box that can monitor the processor to determine the total volume of ventilation air introduced into the structure. This test data is used to program processor timing inputs to achieve desired ventilation results.

An exhaust fan assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a bearing chamber and surrounding annular space. A fan driven by a shaft extending downward from the bearing chamber draws exhaust air from the plenum and blows it up through the annular space to a nozzle at the top of the fan assembly.

At a milling machine to work ground surfaces, with a machine frame, a milling drum supported at the machine frame, at least one transport device arranged at the machine frame which accepts the milled material from the milling drum, as well as with a suction device for the air polluted with dusts and vapors, whereby the milled material on the at least one transport device is enclosed by a channel, the suction device is connected to a rear channel section of the channel in the direction of the material transport and sucks off the air polluted during milling at the milling drum and in the rear channel section essentially in the direction of the material transport, it is provided that the suction device consists of a suction ventilator, a separator device for solids and a suction channel which is connected to the rear channel section, that the suction ventilator is arranged downstream of the separator device, and that the suction device disposes of the separated solids onto the transport device in a forward channel section in the direction of the material transport or into a collecting device, and the suction ventilator blows off the cleaned air into the environment.

An air ventilation system, comprising an air inlet for admitting contaminated air into the ventilation system, an air outlet for discharging decontaminated air from the ventilation, and an ultra-violet light source disposed therebetween. The ventilation system has a filter disposed upstream of the ultra-violet light source. The filter has a grease particle separator with at least two layers of expanded metal associated therewith. Each has a predetermined number of apertures forming a reticulum. A cartridge filter may be provided for each grease particle separator and disposed upstream thereof. Each cartridge filter and associated grease particle separator preferably forms an integral filtering unit and may be placed at any location of the system.

A method of improve the removal of particulate matter, heavy metals, neutralizing acid, and kill microorganism pollutants, known to be in contaminated air volumes of occupied confined spaces, when exposed in close contact under pressure to a mixture of alkaline sorbent materials, having a known synergism between said pollutants using a self propelled fluidized bed reactor and packed bed filter apparatus system to optimize the contact collection efficiency of submicron particles and organic compounds.

A combustor assembly including an injector element able to inject and substantially mix a fuel with a vitiated air stream, so that the substantially all of the fuel injected into the vitiated air stream reaches an auto ignition temperature before it combusts. Generally, the injector element expels the fuel from the injector orifice at a rate, a velocity, a trajectory, or a flow geometry able to mix the fuel with the vitiated air. Generally, the fuel is able to mix with the vitiated air in such a manner that the fuel is substantially mixed and no substantially high or substantially low concentrations of fuel exist in the air stream at the time that the fuel reaches the auto ignition temperature.

An exhaust fan assembly is provided for expelling contaminated air from a building. The assembly includes fan housing connected to the building via a duct. The fan housing contains a fan the draws air from the building through the duct. An extension is mounted to the outlet end of the fan housing, and has a cylindrical upper end connected to a nozzle. A windband is connected to the upper end of the nozzle, and provides an air entrainment path that allows ambient air to mix with the exhaust air prior to exiting through an exhaust fan assembly outlet.

An air washer adsorbs outside contaminated air to disks, which have water films formed thereon, and settles contaminants in water in a water reservoir, thus purifying and humidifying air.

The Diffusive Plasma is for effective treatment of contaminated air and material processing. Air is purified and disinfected by passing through the diffusive plasma device which includes a reactor or a plurality of reactors arranged in parallel or series and is energized by a high voltage alternating current power supply. The diffuser, being electrically isolated, provides extra nucleation sites to initiate discharges. It serves to improve the generation of uniform and consistent plasma and to reduce the variation of discharge properties among the reactors. The addition of a diffuser, thereby, enhances the overall effectiveness of decomposing chemicals and destroying microbes to achieve high air treatment and material processing performance. The diffuser can be made of suitable filtering materials to additionally serve as a filter. By incorporating suitable catalytic materials with the diffuser, the reactor becomes a catalytic plasma reactor wherein the plasma environment provides enhanced catalytic functions. Effective plasma power deposition may be obtained by controlling the amplitude, waveform period and shape of the voltage applied to the electrodes of the reactor and hence the operation of the reactors with plasma discharged of selected conditions for optimizing the treatment and processing efficiency while minimizing the generation of unwanted bi-product gases. The present invention also relates to a method for effective air treatment and material processing.

An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner walls which define a drive chamber and surrounding annular space. A fan driven by a motor whose shaft extends downward from the drive chamber draws exhaust air from the plenum and blows it up through the annular space to a nozzle at the top of the fan assembly. The motor is pivotally mounted inside the assembly to provide access to the motor components when it is desired to perform inspection and maintenance.

A method for urging contact between contaminants in an air stream and the wet surfaces of an aqueous-froth, and additional means of limiting the froth to a predetermined volume are provided. A wide spectrum of solution micro-droplet sizes (0.001 to 1000 micron) is introduced into a contaminated air stream. Micro-droplets suspended in the air stream remove contaminants by contact, collide and coalesce in the dynamics of the air stream and are removed by inertia. Smaller micro-droplets remain suspended in the air stream. The smallest micro-droplets evaporate, increasing the solution vapor pressure of the air stream. The humidified or saturated, contaminated air stream continuously expands the surface area of the solution reservoir exponentially into an aqueous froth of tiny bubbles. Airflow velocity drops in the micro-atmosphere inside each bubble of the froth. Contaminants and solution micro-droplets suspended in the air, inside the bubbles, settle out by the acceleration of gravity into the wet surfaces inside of each bubble. The froth is dewatered by condensation of the bubble walls, solution vapor, and micro-droplets, with trapped contaminants, onto the cold air, adjacent cold surfaces, and cold refrigerant coils. The liquid solution and contaminants drain from the refrigerant coils into the solution reservoir. Solution micro-droplets remaining in the air stream are drawn through a centrifugal blower/droplet separator and are thrown onto the blower housing to drain back into the solution reservoir. The air stream is passed through condensing refrigerant coils to reheat the air stream and reduce relative humidity. Variations including scaling, alternative methods of fogging, and additional applications are described.

The present invention relates to a tunnel air-exchange device, and more specifically to one in which: the air inside normal tunnels including tunnels through which vehicles run is cleaned and polluted internal tunnel air is expelled to the outside, to which end cold air, supplied to water tanks of different sizes provided in line at set intervals in the floor inside the tunnel, is used to ensure that the heavy soot and gases in the polluted hot air generated by vehicles, are sucked into the water tanks while the lighter foul air is discharged through chimneys by convection, thereby creating a pleasant tunnel environment by always maintaining clean air inside the tunnel; and which also extinguishes fires by spraying fire-extinguishing water during tunnel fires. Accordingly, the present invention combines a chimney effect with natural convection provided by the water tanks to exchange the air inside the tunnel and naturally expel polluted air, which is in contrast to exhaust fans of the prior art because there is no generation of noise or heat, and expenses can be reduced since there is no electrical consumption.

There is no mask on the market or registered with the USPTO that uses ultraviolet light to kill air-borne viral and bacterial contaminants. The invention will ensure that if an individual must perforce be exposed to contaminated air as a result of natural or manmade events, then that individual will be able to use the Ultraviolet Light Assisted Protective Breathing Mask (the “ULAP Breathing Mask”) to kill whatever known or unknown viruses or bacteria may be in the vicinity. The ULAP Breathing Mask kills these contaminants before inhaled air ever reaches the filters. The prototype weighs approximately three pounds, and so is easily portable and is practical.