Showing papers on "Diffuser (sewage) published in 1987"

The market maven: A diffuser of marketplace information.

Abstract: The research focus is individuals who have information about many kinds of products, places to shop, and other facets of the market, and initiate discussions with and respond to information request...

Aroma diffuser assembly

Abstract: An aroma diffuser assembly is provided with an electrical wire heating element for effecting the release of an aroma from a contained aroma producing material. Power is supplied to the heating element by a power supply assembly which has a first portion for electrical connection to an external power source and a second portion for supplying power from the external power source to other than the heating element. The power supply assembly is rotational within the aroma diffuser assembly to accommodate both vertical and horizontal orientations of a conventional household outlet as a source of power.

Improvements in Performance Characteristics of Single-Stage and Multistage Centrifugal Compressors by Simultaneous Adjustments of Inlet Guide Vanes and Diffuser Vanes

Abstract: Amelioration des performances de compresseurs centrifuges a un ou plusieurs etages par un reglage simultane des aubages du distributeur d'entree et du diffuseur

Gas induction and hold-up characteristics of liquid jet loop reactors

Abstract: Gas induction and hold-up characteristics of liquid jet loop reactors (LJLR) have been studied. From the results of these investigations with various diffuser geometries the effect of various parts of the diffuser on the rate of induction, QG , and the gas hold-up, EG , have been discerned. Two different diffuser designs yield highest EG and QG , respectively. The use of draft tube has been found to increase the gas hold-up by 25-60% over those in its absence. Correlations for QG and EG involving the main geometrical parameters of the nozzle-diffuser combinations and the liquid jet power input have been developed.

Laser machining method

Abstract: Air diffuser openings are machined in hollow gas turbine blades. The blade is supported in alignment with a laser machining beam and rotatable around several perpendicular axes. It is simultaneously rotated about both axes whereby a substantially hourglass shape is machined out of the blade. The root of the hourglass shape may thereafter be enlarged.

Centrifugal pump stage with abrasion resistant elements

Abstract: A centrifugal submersible pump has wear resistant features to resist erosion due to sand laden fluid from a well The pump has a plurality of stages, each having a diffuser and an impeller located within a housing The diffuser has a sleeve in its inner portion that has a flange on its upper end The sleeve is a separate component from the remaining portions of the diffuser and harder The impeller has a vane section and a hub The hub is carried inside the sleeve The hub has a flange that bears against the flange of the diffuser sleeve The impeller hub is a separate component from the vane section of the impeller and is of a harder material

Apparatus for introducing a gas into a fluid

Abstract: An apparatus for introducing gases in the form of fine bubbles into a fluid is described, in which a diffuser pipe for a perforated distributor hose is mounted on a gas supply pipe. The diffuser pipe is constructed in one piece, extends transversely across the gas supply pipe, and is attached to the same by means of clamping elements. An opening for the passage of the gas is provided between the diffuser pipe and gas supply pipe. A pair of plugs positioned in the diffuser pipe define a flooding chamber at each end of the pipe and a gas-carrying chamber positioned medially therebetween. The apparatus is particularly suitable for the aeration of activation tanks for waste water.

Method of stable combustion for a fluidized bed incinerator

Abstract: A method of stable combustion in a fluidized bed incinerator for burning and decomposing refuse such as municipal wastes while fluidizing them is disclosed. A number of air diffuser tubes are provided inside the incinerator body for fluidizing the refuse and the fluidizing medium. The fluidizing air from the air diffuser tubes is supplied at high speed or low speed from each of the tubes respectively. By alternately forming more and less fluidized areas inside the fluidized bed, the refuse is stably burned. Because of the stable combustion of the refuse, the combustion air ratio can be reduced and the combustion chamber temperature inside the incinerator can be maintained at a high level.

Centrifugal pump stage with abrasion resistant impeller hub

Abstract: A centrifugal submersible pump has wear resistant features to resist erosion due to sand laden fluid from a well. The pump has diffusers and impellers located within the housing. Each diffuser has a diffuser sleeve with a coaxial bore. The diffuser sleeve is of a material harder than the remaining portions of the sleeve. A hardened lower hub locates slidingly within each diffuser sleeve. The lower hub rotates with the shaft. Each impeller has an upper hub that locates above the lower hub and is also carried by the shaft for rotation with the shaft. The upper hub extends into the bore of the next upward diffuser sleeve. The lower hub is of a material harder than the upper hub and the vane section of the impeller.

Apparatus for gas transfer and flotation for treating water to be purified

Abstract: Apparatus for treating water by gaseous diffusion and flotation comprising a single reactor which is separated into at least two compartments. One compartment is used for gas transfer with a pressurized gas diffuser flushed by a liquid current wherein water to be treated is introduced downwardly. The other compartment is in communication with the first compartment by means of an orifice whose opening diameter and orientation are controlled.

Compressor with supercritical diffuser

Abstract: Losses in a diffuser 26 for a radial discharge compressor including an impeller 10 with impeller blades 16 terminating in radially outer discharge ends 18 are minimized by means of first and second stages of diffuser vanes 30 and 32, which vanes 30 and 32 have cross sectional shapes configured as supercritical airfoils.

Aerobic composting apparatus

Abstract: The invention concerns an apparatus including an air diffuser device and process useful in the domestic scale aerobic composting of organic wastes. The air diffuser has within its air admitting opening means to exclude insects, small animal pests and to also exclude waste from entering the air diffuser. Containers may be employed which have only a single opening admitting access to the contents of the container and the side walls of the container need not have apertures. The air diffuser device may be used with a variety of types of containers and particularly with plastic bags. By using containers which do not have openings to the exterior, except for the opening in which the air diffuser is located and possible small liquid drainage openings, composting may be undertaken with control of pests and flies in regions near residences and without excessive drying of the edges of the compost mass, in a way not previously known.

Sun visor with mirror lighting and pivoted cover

Abstract: The present invention relates to a vehicle sun visor comprising a lighted mirror and at least one pivoted cover which in its closed position covers at least a portion of the mirror. According to the invention, the cover is pivotally supported by the diffuser plates, which are included in the mirror lighting. This makes it possible to easily remove the diffuser plates by using the cover as a handle to snap the diffuser plates out of engagement with the walls of the cavities in which the diffuser plates are held.

High yield air diffuser for tanks used in the aerobic treatment of waste waters.

Abstract: Diffuser (10) comprising a cylindrical body (11) inside which a helical section (12, 12a) is provided. At the base and at the top, a sparger (13) and a distributor (14) respectively are foreseen. Preferably a second sparger is foreseen at the top, around the distributor (14). Each sparger (13, 13a) consists of a hopper (15) having the major base provided with tongues (16) that radially depart from its periphery. Distributor (14) comprises a truncated-cone portion (24) having the minor base made up of a conical element (25), openings (26, 27) being provided both in the conical element and in the lateral surface of the hopper (15). The diffuser (10) is fixed to a suitable support (22) by means of tie rods (21) held on the protruding edge (18) of the upper sparger (13a).

Connecting moulded ceramic and metallic components

Abstract: In a gas turbine, the metallic casing and ceramic components, such as the combustion chamber or diffuser, are connected by means of thick-walled, sintered intermediate layers, so that a ductile and thermally insulating suspension can be achieved.

Reaction tube for vapor growth device

Abstract: PURPOSE:To grow a highly uniform crystal by introducing two groups of raw gases which react with each other in a vapor phase respectively from two inlets provided before and after a diffuser and controlling the formation of an intermediate product. CONSTITUTION:A GaAs substrate 4 for growth is placed on a carbon susceptor 5 supported by a quartz tube 6 in a vapor-growth reaction tube 10. (CH3)3In and (CH3)Ga are introduced from a raw gas inlet 1 respectively at 500 and 800sccm flow velocities by using H2 as a carrier gas and diffused by a diffuser 3 to form a uniform flow in the reaction tube 1. Meanwhile, PH3 which reacts with one of the above-mentioned raw gases in a vapor phase is introduced at 100sccm flaw velocity from a raw gas inlet 2 having its blow-off port after the diffuser, and a GaInP crystal is grown under the condition of 4l/min total flow rate, 100Torr pressure, and 650 deg.C.

Anaerobic biological reaction device

Abstract: PURPOSE:To improve the contact rate between waste water and living things and to prevent clogging and drift by providing a gas diffuser for blowing a metabolyzing gas to the inside of an upward current type reaction device which uses biological membrane sticking thereto and contains sticking carriers to the bottom of said reaction device. CONSTITUTION:The upward current type reaction device 1 which uses the biological membrane sticking thereto is packed with the sticking carriers 2 and is provided with a gas separating mechanism 3 in the upper part. A flow regulator 4 for introducing the waste water and the diffuser 5 for introducing the circulating gas are provided in the lower part of the carriers 2. The regulator 4 communicates with a circulation pump 6 and a waste water pump 7. The diffuser 5 communicates with a gas blower 9. The mechanism 3 is divided to a gas lift tube 11 and a gravity settling part 12 by a partition plate 10 and is formed with a gas reservoir 13. As a result, the contact between the waste water and the living things is improved by the stirring effect of the gas and the clogging and drift by the inflow of suspended matter are prevented.

Gas turbine provided with heat exchanger

Abstract: PURPOSE:To aim at miniaturization of a heat exchanger as well as eliminating the need of power by providing a heat pipe as a heat exchanger, for which both ends are inserted into a diffuser and an exhaust pipe respectively, and then locating its radiation part at a position higher than its endothermic part. CONSTITUTION:In a gas turbine, the compressed air A is introduced into a combustor 3 after it is decelerated by a diffuser 2, and then, it is heated by the combustion of fuel to be a high-temperature and high-pressure gas, which causes a turbine to rotate, and subsequently, it is discharged from an exhaust pipe. In this case, a heat exchanger 7 is composed of a heat pipe 8 and a vast number of fins 9 which are fixed to both ends of the heat pipe 8. In addition, both ends of the heat pipe 8 are inserted into a diffuser 2, which is provided on the upstream side from a combustor 3 and on the downstream side from a compressor 1, and an exhaust pipe 6, which is provided on the downstream side from the outlet 5 of a turbine 4 respectively. And further, the diffuser 2 side in the heat pipe 8 is made to be a radiation part 7a, and the radiation part 7a is located at a position higher than an endothermic part 7b on the exhaust pie 6 side.

Process for microaquaculture and pollution control

Abstract: Method for producing and removing dissolved and particulate matter from natural bodies of water and wastewater in situ for the production of organic biomass such as feedstocks, for the removal of pollutants, nutrients, toxins and other substances, and for other purposes. A gas is introduced through a diffuser into a body of water to form bubbles. The bubbles rise within a lifting tube, gathering dissolved and particulate matter on their surfaces. The bubbles produce a foam at the surface of the body of water, the foam being collected in a reservoir, concentrated and drawn off.

Treatment of low-concentration organic waste water

Abstract: PURPOSE:To treat waste water without decreasing the quality of treated water in high-BOD volumetric load by allowing microorganisms to stick of itself on the calcined cristobalite of an insoluble carrier and allowing the microorganism-stuck carrier to flow in an aeration tank. CONSTITUTION:The insoluble carrier 2 of the calcined granular cristobalite is loaded into the aeration tank 1 consisting of a flowing part 1a and a setting and separating part 1b above said part. Activated sludge is added as seed sludge thereto. The synthetic org. waste water is pumped 5 from a waste water tank 4 to the bottom of the aeration tank 1. Air is supplied through an air diffuser 6 to the aeration tank 1, by which the insoluble carrier 2 is raised in a draft pipe 7 and is lowered on the outside of the draft pipe 7 so as to flow in the aeration tank 1. As a result, the TOC value in the treated water is maintained constant even in the high BOD volumetric load. The possibility of decreasing the sludge concn. by the wear of the carrier is eliminated.

Engine air diffuser

Abstract: An air diffuser (50; 100) for an internal combustion engine, fitted within a housing (32), remote from an air cleaner (34) for causing a more distribution of air to flow to the cylinders of the engine.

Bulk Mixing Using Diffused Air in Circular and Rectangular Vessels

Abstract: The use of compressed air for bulk mixing in circular and rectangular vessels has been investigated. A definition for “100% uniformity” has been postulated and correlations between the mixing time, shear gradient, and dimensionless diffuser submergence have been presented. It has been found that the mixing time in a vessel is primarily dependent on the shear gradient, G. A secondary dependence on the diffuser submergence is noted. Mixing times were measured using dye concentration versus time plots of salt and Rhodamine‐B dyes in batch experiments. Salt dye was found to produce longer mixing times for similar operating conditions. The product of the mixing time and the shear gradient has been calculated and compared to the values recommended in the literature for standard water and wastewater treatment operations. The writers' data fall below those recommended values, as expected, since only the time required for bulk uniformity and not chemical reaction, biological activity, floe formation, or gas transf...

Single tank tertiary treatment apparatus

Abstract: PURPOSE:To reduce installation area and to decrease running cost, by arranging an aeration apparatus to the intermediate part of one tank to simultaneously perform denitrification reaction and nitration reaction. CONSTITUTION:Sewage A, a recirculation liqiud D and return sludge E flowing in a nitration-denitrification tank 1 from a water inflow port 2 undergo oxygen diffusion on the aeration of inert gas J by a diffuser 12. The inert gas J and the diffused oxygen impinge against the diffusion wall 4 arranged to the upper part of the diffuser 12 and is issued to the outside of the nitration-denitrification tank 1 through a diffusion pipe 13. The diffusion wall 4 is partially inclined so as to prevent the inert gas J from entering a denitrification process part and the diffused treated liquid is brought to an anaerobic state to enter the denitrification process part where nitration-denitrification reaction is performed. By this method, a site is reduced to a large extent and energy can be saved.

Ionizer diffuser air purifier

Abstract: An ion diffuser has a frusto-conical surface made of thin metal in which surface are a plurality of emitter orifices. Around the perimeter of each orifice are a plurality of raised points that are angled toward a stream of dirty gases flowing through each emitter port. Submicron particles are ionized as they pass through the orifices when the metal is energized positively from a high voltage powerpack. A fan, to which are connected filaments, rotates above the frusto-conical surface and the submicron particles are collected by the filaments.