Showing papers on "Diffuser (sewage) published in 2012"

Reduced phosphor lighting devices

Abstract: A lighting device comprising a solid-state light source (62), and a diffuser (63) configured for color mixing of the light from the solid-state light source (62) and spatially separated therefrom, the diffuser (63) comprising at least one phosphor material (65). Methods of fabricating a lighting device having a reduced total amount of phosphor comprising combining an amount of phosphor (65, 69, 175, 252, 634, 642, 644, 652, 654, 662, 664, 672, 682, 684) with a diffuser structure (63, 182, 250, 630, 640, 650, 660, 670, 680).

Exhaust gas diffuser

Abstract: According to one aspect of the invention, an exhaust gas diffuser (200) includes an outer casing (202) disposed about a center line (205) of the exhaust gas diffuser (200), a hub (204) disposed about the center line (205), and an end portion (214) of the hub (204) comprises a recess (216) configured to cause a flow of exhaust gas toward the center line (205) as the exhaust gas flows in a downstream direction (207).

Percutaneous heart pump

Abstract: Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface.

Investigating primary marine aerosol properties: CCN activity of sea salt and mixed inorganic-organic particles

Abstract: Sea spray particles ejected as a result of bubbles bursting from artificial seawater containing salt and organic matter in a stainless steel tank were sampled for size distribution, morphology, and cloud condensation nucleus (CCN) activity. Bubbles were generated either by aeration through a diffuser or by water jet impingement on the seawater surface. Three objectives were addressed in this study. First, CCN activities of NaCl and two types of artificial sea salt containing only inorganic components were measured to establish a baseline for further measurements of mixed organic-inorganic particles. Second, the effect of varying bubble residence time in the bulk seawater solution on particle size and CCN activity was investigated and was found to be insignificant for the organic compounds studied. Finally, CCN activities of particles produced from jet impingement were compared with those produced from diffuser aeration. Analyses indicate a considerable amount of organic enrichment in the jet-produced particles relative to the bulk seawater composition when sodium laurate, an organic surfactant, is present in the seawater. In this case, the production of a thick foam layer during impingement may explain the difference in activation and supports hypotheses that particle production from the two methods of generating bubbles is not equal. © 2012 American Chemical Society.

Materials and coatings for a showerhead in a processing system

Abstract: Apparatus and systems are disclosed for providing a protective material for a showerhead of a processing system. In an embodiment, a processing system includes a processing chamber for processing substrates and a showerhead having a diffuser plate for distributing processing gases to the processing chamber. The diffuser plate may include a protective material to protect the showerhead from processing gases. The diffuser plate may be formed with tungsten or tungsten coated with a tantalum alloy and tantalum.

Low nitrogen oxide burner

Abstract: PURPOSE: A low nitrogen oxide burner is provided to improve an effect for reducing nitrogen oxides and to reduce wind pressure loss, thereby applying the same to boilers with various capacities and kinds. CONSTITUTION: A low nitrogen oxide burner includes a tube (1210), a plate diffuser (1220), a fuel feeding pipe (1230), a first fuel nozzle pipe (1240), and a second fuel nozzle pipe (1250). The tube is inserted into the burner mounting hole (110) of a combustion chamber (100), and protrudes inside the combustion chamber. The plate diffuser at the end portion of the tube is perpendicular to the longitudinal direction of the tube. Air forming an excess air combustion zone is diffused from an air diffusion hole (1221) at the center of the plate diffuser. The air is diffused through an air diffusion path (1211) between the end portion of the plate diffuser and the end portion of the tube. The protrusive end portion of the fuel feeding pipe is below the end portion of the tube so that the fuel feeding pipe is separated from the plate diffuser. The first fuel nozzle pipe firstly branches off from the fuel feeding pipe, and an end portion thereof is placed outside the circumference of the plate diffuser. The second fuel nozzle pipe secondly branches off from the fuel feeding pipe, and an end portion thereof is placed inside the circumference of the plate diffuser.

Diffuser Augmented Horizontal Axis Tidal Current Turbines

Abstract: The renewal energy technologies are increasingly popular to ensure future energy sustenance and address environmental issues. The tides are enormous and consistent untapped resource of renewable energy. The growing interest in exploring tidal energy has compelling reasons such as security and diversity of supply, intermittent but predictable and limited social and environmental impacts. The tidal energy industry is undergoing an increasing shift towards diffuser augmented turbines. The reason is the higher power output of diffuser augmented turbines compared to conventional open turbines. The purpose of this study is to present a comprehensive review of diffuser augmented horizontal axis tidal current turbines. The components, relative advantages, limitations and design parameters of diffuser augmented horizontal axis tidal current turbines are presented in detail. CFD simulation of NACA 0016 airfoil is carried out to explore its potential for designing a diffuser. The core issues associated with diffuser augmented horizontal axis tidal current turbines are also discussed.

Backlight device and liquid crystal display

Abstract: A backlight device includes a housing, a light source, a diffuse plate and a fixing member The housing has an open surface The light source is arranged in the housing The diffuser plate is arranged on the open surface of the housing and allows light emitted from the light source to pass therethrough while diffusing the light The fixing member prevents the diffuser plate from bending in a direction in which light passes through the diffuser plate A part of the fixing member has transmittance adjusted to substantially equalize luminance distribution of light passed through the diffuser plate

Optimization of oxygen transfer through venturi-based systems applied to the biological sweetening of biogas

Abstract: BACKGROUND: Dissolved oxygen is a key parameter in the biological removal of gaseous H2S since sulfide-oxidizing bacteria convertH2Sintoelementalsulfurinsteadofsulfateunderlimitingdissolvedoxygenconcentrations.Elementalsulfurisinsoluble in water and accumulates in the packing material in biotrickling filters, increasing the pressure drop and operating costs. A set ofmasstransfertestswasperformedinaversatilepilotplanttosupplythenecessaryoxygenforthebiologicaloxidationofH2S. The plant can be operated with three different commercial gas‐liquid contactor devices: a venturi ejector, a jet-venturi and a diffuser. The effects of different geometric and operating parameters have been tested for each device (including pressure rise and sulfate content to mimic real wastewater treatment plant conditions). RESULTS: Results showed that the bioreactor pressure has a strong influence on the mass transfer characteristics of the three oxygenation devices. In addition, the ionic strength of the solution has a low influence on the mass transfer process. The SOTE values obtained for the diffuser, jet-venturi and venturi ejector were 8.7%, 7.2% and 6.0%, respectively (pure water experiments), while SAE values were in the range 6.3‐5.5 × 10 −2 ,4 .1‐4.8 × 10 −1 and 3.1‐3.7 × 10 −1 kg O2 kW −1 h −1 , respectively. CONCLUSIONS: The jet-venturi offers the best oxygen transfer with lower power consumption compared with the diffuser and venturi ejector. The practical implementation of the most efficient aeration technology is possible from both technical and economical perspectives. c � 2012 Society of Chemical Industry Supporting information may be found in the online version of this article.

LED bulb with integrated thermal and optical diffuser

Abstract: A light emitting diode (LED) light bulb includes a thermally conductive base and at least one LED assembly disposed on and thermally coupled to a surface of the base The LED assembly includes at least one LED configured to generate light A thermal optical diffuser defines an interior volume and the LED is arranged to emit light into the interior volume and through the thermal optical diffuser The thermal optical diffuser is disposed on the surface of the base and extends from the base to a terminus on the light emitting side The thermal optical diffuser is configured to include one or more openings that allow convective air flow between the interior volume of the thermal optical diffuser and ambient environment

Diffuser element and lighting device comprised thereof

Abstract: This disclosure contemplates embodiments of a diffuser element for use with lighting devices that utilize directional light sources, e.g., light-emitting diode (LED) devices. The embodiments utilize a shell wall that forms a volume diffuser with a non-uniform material thickness. The variations in the thickness afford the diffuser with optical characteristics that can improve the distribution of light. In one example, lighting devices that deploy the diffuser element and LED devices distribute light with an optical intensity distribution similar to an incandescent bulb.

Water aeration system using renewable energy source

Abstract: The water aeration system using a renewable energy source is a self-contained unit having a float and a perforated diffuser plate positioned below the float. An electrically powered air pump is installed atop the structure, and a device for collecting renewable energy also extends above the structure. The renewable energy collection device may be one or more solar panels or a wind generator or wind turbine. The pump draws ambient air in through an inlet and pumps the air down through a supply tube to escape from a nozzle below the diffuser plate. The air then bubbles up through the water, the bubbles being broken up by the small perforations of the diffuser plate to provide efficient aeration of the water. An electrical storage battery and auxiliary power receptacle may be provided to power the pump motor during periods when solar or wind power is not available.

Wall socket aroma diffuser using aroma capsule

Abstract: A wall socket aroma diffuser using an aroma capsule is provided, including a wall socket aroma diffuser having a transparent receiving unit and an aroma capsule received in the wall socket aroma diffuser. The aroma capsule is heated to diffuse scent, and is disposable after the aroma thereof is diffused into an ambient environment completely. It is thus easy, safe for a user to replace the used aroma capsule with a new one because the aroma capsule will not be broken and the aroma thereof will not flow to a region outside of the aroma capsule. The user does not need to wash the aroma diffuser. The wall socket aroma diffuser further includes a light emitting diode that emits and projects light onto the transparent receiving unit. The light is guided and diffused by the receiving unit to generate color that pleases people's eyes.

Oil-containing wastewater treatment system

Abstract: In order to simplify devices by efficiently combining dissimilarities of respective steps used in an oil-containing wastewater treatment system, in a supply path of raw water produced from oil-containing wastewater, a separation tank for floating and separating an oil content, and downstream from the separation tank, a membrane filtration tank in which a membrane separation module produced from a hollow fiber membrane or a flat membrane is disposed therein and a diffuser for generating air bubbles is installed below the membrane separation module is disposed, and a supply pipe provided with a circulating pump in the middle thereof to supply the raw water from the separation tank to the membrane filtration tank, and a return pipe for returning unfiltered water containing the oil content and the air bubbles from the membrane filtration tank to the separation tank are provided.

Aeration efficiency influenced by venturi aerator arrangement, liquid flow rate and depth of diffusing pipes

Abstract: The effect of aerator module configuration, liquid flow rate and diffuser submergence on oxygen transfer efficiency was examined in a surface aeration system with venturi injectors using the clean ...

Diffuser augmented wind turbines

Abstract: An example wind turbine diffuser has an expanded outlet area where the diffuser outlet area is greater than it's cross sectional area. The diffuser may be formed of one or more diffuser rings, at least one of which may form a turbine cowling. Each diffuser ring may have an inlet area that is smaller than the outlet area of the directly upstream ring. The portion of an upstream ring outlet which is not occluded by the downstream ring may form a diffuser outlet such that the total outlet area of the diffuser is larger than the cross-sectional area. In another example, the diffuser may comprise at least one diffuser ring and one or more suction slots that are each connected to a vent, which allows air to be removed from the diffuser system.

Cartridge for scent diffuser, scent diffuser and corresponding system

Abstract: The invention concerns a cartridge to diffuse scents, comprising a hollow tubular body adapted to allow the internal circulation of air. In order to optimize the diffusion of the scent, the body comprises At least one primary internal part in contact with the flow of air, and impregnated with an odorizing substance in order that the flow of air absorbs the perfume, and At least one secondary internal part adjacent to the first part which allows the free circulation of the flow of air. The invention also concerns a scent diffuser comprising a cartridge associated to a blower as well as a system comprising several diffusers and a controller.

Fuel battery cell

Abstract: A fuel battery cell C includes a membrane electrode assembly 2 having a frame 1 in a periphery thereof; two separators 3A, 3B holding them therebetween; and gas seal members 11, 12 provided to peripheral portions of diffuser areas D1, D2 each formed between the frame 1 and one of the separators 3A, 3B A diffuser-area-D1-side edge position of the gas seal member 11 in the diffuser area D1 on the cathode side and a diffuser-area-D2-side edge position of the gas seal member 12 in the diffuser area D2 on the anode side are offset from each other in an inside-outside direction of the diffuser areas D1, D2

Cyclone-type Venturi jet aeration nozzle

Abstract: The utility model relates to a cyclone-type Venturi jet aeration nozzle which comprises a collapsible tube, a trunnion, a suction opening, a diffuser tube, a flow deflector and the like. According to processing condition, 3-10 flow deflectors are welded on the inner side of the diffuser tube and are uniformly distributed along the inner side. Pressure water (containing activated sludge and sewage) from an injection pump flows through the trunnion at a high speed and then negative pressure is formed. Air is absorbed into high speed steam through the suction opening and is violently mixed with sewage and activated sludge in the trunnion to form a solid (activated sludge)-gas (air)-liquid (sewage) three-phase homogeneous emulsion jet water course. Under the guidance of the flow deflector in the diffuser tube, the three-phase homogeneous emulsion jet water course is sprayed out in a spiral diffusion way. After being sprayed out from the diffuser tube, the homogeneous emulsion whirlingly flows forward in a turbulent water body in the aeration tank to continue the mass transfer effect so as to prolong retention period of tiny bubbles in sewage. Therefore, continuous high-efficiency aeration effect is realized. The cyclone-type Venturi jet aeration nozzle provided by the utility model is prepared from stainless steel, has a simple structure, and is convenient to use.

Turbine Blade Tip With Tip Shelf Diffuser Holes

Abstract: A turbine blade having a tip including a tip shelf through which pass one or more diffuser cooling holes, the diffuser cooling holes directing the flow of cooling gas along the tip shelf, spreading the flow of cooling gas more evenly along the tip shelf and enhancing the formation of a curtain of cooling air along the tip shelf, leading to lower blade tip temperatures, reduced diversion of cooling air, and greater turbine blade life.

A gas sensing system

Abstract: The present invention relates to a gas sensing system (100) for detecting a particular gas from an environment. The gas sensing system (100) comprises of a micropump device (110), a diffuser (120), a micro-channel (130), a gas sensor (140), and an exhaust micro-channel (150). The micropump device (110), the diffuser (120), the micro-channel (130), the gas sensor (140), and the exhaust micro-channel (150) are fabricated on different substrates and are stacked and bonded on top of each other.

Air drill diffuser

Abstract: A diffuser adapted to dissipate air from seed conveyed in a stream of air at a planter to an opener arm and seed boot. The diffuser provides a housing that pivotally supports a counter-weighted valve piece and a resilient valve piece. Admitted seeds are resiliently deflected between the valve pieces. Repeated deflections between the dual valve pieces and simultaneous venting of the conveying air through an associated fulcrum screen and relief ports at the housing dissipate the conveying air. Spent seed momentarily collects on a surface inside the housing and gravitationally falls from the housing and through a lower lying seed boot at a relatively uniform, singulated rate without scatter and damage to the seed.