Showing papers on "Diffuser (sewage) published in 1994"

Method for continuously mixing fluids

Abstract: Apparatus and method of hydrating a particulated polymer and producing a well treatment gel includes a mixer for spraying the polymer with water at a substantially constant water velocity and at a substantially constant water spray pattern at all flow rates of the water. A centrifugal diffuser is connected to the mixer for receiving the mixture, centrifugally diffusing the motive energy of the mixture, and hydrating the mixture into a gel. A centrifugal separator and constant velocity jet pump may be connected between the mixer and the centrifugal diffuser. A dilution valve is connected to the discharge of the centrifugal diffuser for mixing water with the gel at a substantially constant mixing energy at all flow rates of the gel and producing a diluted gel. A viscometer may be connected to the discharge of the dilution valve for measuring the viscosity of the diluted gel and regulating the flow of gel from the centrifugal diffuser to the dilution valve in order to control the viscosity of the diluted gel.

Diffusion vent for a rechargeable metal-air cell

Abstract: A vent system (10) for exhausting gas generated within a battery case (12) is provided The vent system exhausts gas from the battery case while maintaining the hermetic seal of the case The vent system provides a small gas exit hole (16) that is sufficiently small to prevent electrolyte leakage and also intake of excess carbon dioxide or excess water vapor from the atmosphere Also, various combinations of gas-permeable, hydrophobic membranes (40, 44) and diffuser material (42) may cover the gas exit hole (16) to provide humidity control for the battery while exhausting gases from the battery A recess (36) may be provided within the case such that the gas exit hole communicates between the atmosphere and the recess Also, various combinations of gas-permeable, hydrophobic membranes and diffuser material may cover the recess and gas exit hole to provide humidity control for the battery while exhausting gases from the battery case The present invention also provides a vent system in which gas-permeable, hydrophobic membranes and diffuser material may fill an opening so as to exhaust gas from the case The present invention also provides an electrode lead (33) which extends along the battery case and through the seam (34) of the battery case in a manner in which a hermetic seal is provided around the lead The manufacturing process for the seal around the lead is relatively simple

Light diffuser composition

Abstract: A light diffuser composition contains a) from 0.1 to 30 weight parts of inorganic particles having an average particle diameter of from 0.1 to 1 micrometer and a refractive index of from 1.9 to 3.2 and b) from 1 to 150 weight parts of polymeric particles having a core/shell morphology with a core of a rubbery vinyl polymer and one or more shells, which particles contain at least 15% of a polymerized alkyl acrylate or alkyl methacrylate, based on the total weight of the particles. The light diffuser composition is useful for preparing a polymer composition which contains a thermoplastic polymer and a) from 0.001 to 0.3% of the inorganic particles a) and b) from 0.01 to 1.5% of the polymeric particles b). Molded articles can be produced from the polymer composition which are particularly useful in lighting applications.

Gas diffuser plate assembly and rf electrode

Abstract: The apparatus includes a gas diffuser plate having an integral heat pipe for accurately controlling the temperature of the diffuser plate during CVD processing to prevent unwanted tungsten (or other material) deposition on the diffuser plate. The apparatus is also useful as an RF plasma cleaning device in which the diffuser plate acts as an RF electrode, the heat pipe tube acts as an RF input lead, and the apparatus further includes a connector to an RF power source. Additionally, in combination, the heat pipe-cooled gas diffuser plate and RF electrode may be used advantageously in plasma enhanced chemical vapor deposition (PECVD).

LOW NOx BURNER.

Abstract: A low NOx burner combustion system (10) which may be adjusted for optimum burn rates, temperature and oxygen levels The burner incorporates a plurality of gas nozzles (34, 36, 38) which individually inspirate a portion of the combustion air and a spin vane diffuser (20) to rotate and mix the gases within the primary combustion zone The diffuser (20) is axially adjustable in order to vary the distance between the vane (20) and the first combustion zone while the blades of the diffuser (20) can be angularly adjusted to optimize the rotation and mixing of the gases Air for combustion is supplied through a passage (16) to create distinct combustion zones for complete combustion The flow rate of the combustion air is controlled through a damper (14) in accordance with the burn characterisitics Further reductions in noxious emissions are accomplished by recirculating flue gases and mixing such gases directly with combustion fuel prior to introduction into the combustion chamber through eductor nozzles (34, 36, 38) Still further reductions are attained by mixing a secondary compound such as water or a chemical into the recirculated flue gases to optimize burn levels thereby reducing emissions

Clean room ventilation system

Abstract: A clean room ventilation system having a diffuser panel attached to a ceiling grid, with a filter element positioned well above the panel. The diffuser panel is perforated throughout its area with increased size and/or density of perforations in a peripheral region to provide increased airflow beneath the ceiling grid. The peripheral regions may further be angled to create a lateral airflow beneath the ceiling grid.

Fiber optic cylindrical diffuser

Abstract: A fiber optic, cylindrical, light diffuser (40) for medical use includes an unclad distal fiber end (45) where the exposed core end has a conical shape. The core end (45) is enclosed by a sleeve (48) which contacts the clad portion (42) of the fiber only and defines a closed chamber (51) with the distal end (45) of the fiber. The chamber (51) is filled with light diffusing material. The diffuser (40) exhibits highly uniform output light distribution and is capable of carrying relatively high power densities safely.

Passive fragrance dispenser

Abstract: A passive aromatic substance dispenser is described. A highly absorbent rod shaped wick, held within a hermetically sealed tube, serves as a fragrance dispensing reservoir in contact with an efficient fragrance diffuser, and also serves as a convenient means for suspending the diffuser in a selected area to be fragranced. When fragrancing an area is not desired, closing the housing for the diffuser seals the diffuser from ambient air currents, protecting the aromatic substance from evaporating from the diffuser. The vacuum that develops within the tube due to the absorption of aromatic substance from the rod and into the diffuser prevents draining of the fragrance material from the rod and into the diffuser when not required, thus providing self regulation of the fragrance material by the dispenser.

Gas turbine diffuser

Abstract: A diffuser for a turbojet engine is disclosed in which a plurality of diffuser inlets are arranged in a substantially circular array bounded by inner and outer diffuser walls and by a plurality of partitions extending generally radially from the axis of the annular diffuser. The plurality of diffuser inlets are located so as to receive air or oxidizer from the turbojet engine compressor and the radial partitions may be integrated into the compressor guide vanes. The diffuser has a plurality of sets of diffuser outlets, each set comprising a plurality of diffuser outlets arranged in a circular array about the central axis of the diffuser. The radius of each set of diffuser outlets is different from the radius of each of the other sets of diffuser outlets such that the entirety of diffuser outlets comprise a non-circular array. The diffuser may comprise three different sets of diffuser outlets, a first set directing air or oxidizer onto the baffle such that the air or oxidizer passes through openings in the baffle to feed the fuel injector heads. A second set of diffuser outlets may be curved outward at the outlet end so as to direct a portion of the air or oxidizer into the space defined between the outer combustion chamber wail and the outer casing. A third set of diffuser outlets may be curved inwardly at their downstream ends so as to direct a portion of the air or oxidizer into the space between the inner combustion and the inner casing.

Diffuser and diffusing method using dual surface tensions

Abstract: A diffuser for dispersing gas bubbles into a liquid is formed of gas permeable material having a high surface tension at an interface with the liquid and a low surface tension in a region inward from the interface. The upstream region with the low surface tension resists liquid backflow, and the high surface tension of the interface keeps the bubbles small as they depart from the diffuser and enter the liquid.

Process and apparatus for biological treatment of aqueous organic wastes

Abstract: A process for reducing the amount of excess sludge by aerobically treating an aqueous organic waste in an aeration tank in the presence of a biosludge containing aerobic microorganisms, subjecting the resulting mixed liquor to a solid/liquid separation, the so-separated liquid phase being discharged as treated liquor, and supplying at least a part of the separated biosludge, after having been treated with ozone, to the aeration tank, wherein the ozone treatment is realized by passing a mixed flow of a biosludge-containing liquor to be treated or a liquor containing the ozonized biosludge and of an ozone-containing gas through a flow-down pipe in a downward flow and introducing the flow into an ozone-treating vessel in a state in which the ozone-containing gas is dispersed as finely disintegrated bubbles, whereby the clogging of a gas diffuser due to the adhesion of the biosludge is avoided and ozone treatment is attained at a high ozone yield.

Conveyor oven exhaust system

Abstract: A hood is assembled of modules including a central make-up air plenum module directly over the heating stations of a conveyorized double-deck oven (11), an exhaust plenum module (36) atop the make-up air plenum (32) and downwardly-opening end modules (38) overhang the conveyor end portions (99) extending outside the sides (57) of the oven heating chambers. The end modules have make-up air directors (61) aiming make-up air upward along the undersides of removable panels (52) having slots (66, 67) therein to accelerate exhaust flow into a chamber below filters (47) to effectively remove fumes from the areas above the conveyor ends. The overhanging end modules also have partitions (56) therein cooperating with the walls of the overhang portions to provide ducts at the front of the overhang portions to capture fumes (67) from the area above the front of the conveyor ends. Air flow guides (101) around the extending portions of the conveyors assist. A make-up air diverter (82) and diffuser (81) are provided, discharging air from the front of the make-up air plenum (32) down the front of the ovens to cool the front exterior surfaces.

Diffuser with controlled diffused air discharge

Abstract: A gas turbine engine diffuser case construction is described that increases the amount of available discharge air for service applications compared to the prior art while reducing downstream component distortion and degradation. The diffuser case has passageways for diffused air that connect a diffused air region to a manifold. At least one orifice is located at the end of each of the passageways in the diffused air region. The size of the orifices controls the amount of air that is discharged from the diffused air region to the manifold. Diffused compressor air collects in the manifold and is then extracted from the manifold as needed for engine or service applications. The size and location of the orifices in the diffuser radially and circumferentially control the rate of discharge of the diffused air from the diffuser before the air enters the combustor region. The ability to influence the flow of air at particular locations around the combustor helps the designer to improve cooling uniformity.

Solid state laser with integral optical diffuser plate to homogenize optical pumping

Abstract: An optical diffuser plate (14) disposed between a flashlamp (13) and a solid state laser within a solid state laser (10) pump chamber (8). The optical diffuser plate acts as a homogenizer of the pump light to reduce pumping inhomogeneities inherent with specular reflectors, while at the same time providing an efficient energy transfer from the flashlamp to the solid state laser. The optical diffuser plate can also filter out pump light below critical wavelengths that can be detrimental to the solid state laser.

Split flame burner for reducing NOx formation

Abstract: An improved pulverized coal burner that reduces the formation of nitrogen oxides. The coal burner includes fuel splitters that separate a mixture of primary air and coal into a plurality of streams while the mixture is discharged through a diffuser having a plurality of partially open areas and a plurality of blocked areas. After passing through the diffuser, the plurality of streams are discharged into a furnace to be burned. The plurality of partially open areas and blocked areas are created by removing sections of the diffuser and replacing the removed sections with fuel spiders. Creation of these discrete streams delays mixing with secondary air. Because primary air is supplied in sub-stoichiometric quantities, the coal in these split streams will be burned under fuel-rich conditions for the first 100 to 200 milliseconds of combustion, until the delayed mixing of secondary air occurs. Combustion in a fuel-rich environment retards formation of nitrogen oxides in two ways. First, nitrogen that is part of the volatile matter that is evolved during the ears stages of combustion will tend to form molecular nitrogen rather than react with oxygen to form nitrogen oxides. Second, an oxygen deficiency will reduce formation of nitrogen oxides from atmospheric nitrogen. Two variations of bypass conduits are disclosed that allow a portion of the mixture of primary air and coal to bypass the diffuser and discharge into the furnace.

Diffuser for hair dryer

Abstract: A diffuser to diffuse the air blast of a hair dryer may be embodied as a removable accessory for existing hair dryers or an integral feature in a hair dryer. A tubular member includes a first end to receive the output of the hair dryer, and a diffuser plate is pivotally secured in the opposed, second end of the tubular member. The diffuser plate is rotatable from a fully open position in which the entire output of the dryer blower is delivered from the second end, to a fully closed position in which the second end is blocked by the diffuser plate. The diffuser plate includes a plurality of holes in a spaced array, permitting a fraction of the dryer output to be delivered from the second end of the tubular member at a reduced velocity. The tubular member includes a plurality of vent holes disposed upstream of the diffuser plate to exhaust a substantial portion of the air flow when the diffuser plate is closed to the attenuating position. The diffuser plate is mounted on a pivot shaft, in the fashion of a choke valve, and an actuating lever translates a link joined to a lug on the end of the pivot shaft. Alternatively, a gear is secured to the end of the pivot shaft, and an actuating slide engages the gear in rack and pinion fashion to rotates the shaft and diffusion plate from the fully open to fully closed position.

Device for mounting air diffusers and boxes to room partition orifices

Abstract: The invention is a bracket having a resilient flange. The bracket attaches to the periphery of a room partition defining an orifice. The bracket provides a secure mounting location for an air diffuser and holds the box associated with the diffuser firmly in place allowing one person to install the diffuser and the box within an orifice.

Exhaust gas turbocharger and method of operation

Abstract: An exhaust gas turbocharger for an internal combustion engine consists essentially of a turbine and a centrifugal compressor, which are both arranged on a common shaft. A vaned diffuser adjoins the compressor impeller driven by the turbine. An auxiliary air drive, which is fed from an external compressed air source, is provided in the compressor part. The auxiliary air drive has a plurality of ejectors by means of which the auxiliary air can be introduced into the region of the diffuser inlet, preferably in the flow direction.

Indicating element for elevators

Abstract: An indicating element for an elevator includes a cover plate having an opening formed therein through which a lens extends. Positioned behind the lens is a light diffuser having an area formed in the shape of a symbol to be displayed. A plurality of light emitting diodes are mounted on a front surface of a printed circuit board and the diodes extend into the diffuser. The front surface of the printed circuit board, as well as the side walls of the diffuser are white to achieve a better light reflection. The lens, the diffuser and the printed circuit board are mounted on studs extending from a rear surface of the cover plate and are retained by nuts. The light emitting diodes are connected together in separate groups with a first switch for connecting the groups in series to a higher voltage alternating current power supply and a second switch for connecting the groups in parallel to a lower voltage direct current power supply.

Aquarium with full-width planar bubble conduit

Abstract: An aquarium includes a water tank received in a picture-frame-shaped housing suitable for either mounting on a wall or being supported on a stand. The housing includes a hidden storage space for neatly storing an air pump. A vertical sheet or partition extending between the sides of the tank divides the tank into a full-width, but relatively thin and flat, bubble conduit behind the partition for carrying air bubbles, and a habitation compartment in from of it for keeping fish. The lower edge of the partition is spaced above the bottom of the tank to form a gap or water intake, and the upper edge of the partition is spaced below the water line to form a water return. An elongated air diffuser substantially extends between the side edges of the bubble conduit near its bottom. When supplied air by the pump, the diffuser emits a wide sheet of air bubbles that rise upwardly through the bubble conduit to aerate the water. The rapidly rising air bubbles also create an upwardly moving water current in the bubble conduit that circulates water from the habitation compartment, through an under-gravel filter positioned at the bottom thereof, through the intake under the partition, up the bubble conduit, and back into the habitation compartment.

Device for separating inorganic material polluted by organic material from a fluid

Abstract: A device for separating organic and inorganic material in a fluid has a round container (1) having in its upper region a centrically arranged feed device (19) with a spinning chamber (22), a gravity pipe (23) and a trumpet-shaped diffuser (24) to introduce the fluid into the container (1). In the lower region (7) of the container (1) there is an extractor device (32) for the inorganic material and a device (29) to discharge the organic material and the fluid. In the lower region (7) of the container (1) there is a fluidised sand bed (14) which is kept in motion by an upward flow distributed via a perforated base (8). In addition there is a by-pass (38) to transfer part of the sand in the sand bed (14) into the extractor (32) in the lower region of the container (1).

Device for ozonating biological sludge

Abstract: PURPOSE: To increase the contact efficiency between a biological sludge-contg liq and an ozone-contg gas, to increase the ozone concn difference by pressuriz ing a reaction tank to enhance ozone absorptivity, to make the waste gas harm less by removing the ozone in the waste gas, to efficiently ozonate the biological sludge and to convert the sludge to BOD CONSTITUTION: An ozone-contg gas 28 is blown into the liq-phase contact region 12 of a reaction tank 1 to decompose sludge by oxidation and to foam the liq, a bubble contact region 13 is formed above the liq-phase contact region 12, the waste gaseous ozone 29 discharged from the bubble contact region 13 is introduced into a liq-sealed device 2 and discharged into a liq sealant 32 from a diffuser 31, the reaction tank 1 is pressurized, and gas-liq contact is preformed

Arrangement for the conduction away of heat and a process for the production thereof

Abstract: A heat diffuser for conducting heat away from a heat generating assembly. The heat diffuser is composed of a heat-conducting polymeric material. The heat diffuser is formed by dispensing strips of the polymeric material directly onto a surface area of the assembly. A computer-controlled nozzle assembly is utilized to disperse the polymeric material. The heat diffuser may be composed of multiple layers wherein the polymeric material for different layers has different mechanical and/or heat conducting properties.

Apparatus and method for gel production

Abstract: A particulate polymer is hydrated, for example to produce a well treatment gel, by spraying the polymer with water in a mixer (22) at a substantially constant water velocity and at a substantially constant water spray pattern at all flow rates of the water. A centrifugal diffuser (24) is connected to the mixer (22) for receiving the mixture, centrifugally diffusing the motive energy of the mixture, and hydrating the mixture into a gel. A centrifugal separator (26) and constant velocity jet pump (28) may be connected between the mixer (22) and the centrifugal diffuser (24). A dilution valve is connected to the discharge of the centrifugal diffuser (24) for mixing water with the gel at a substantially constant mixing energy at all flow rates of the gel and producing a diluted gel. A viscometer may be connected to the discharge of the dilution valve for measuring the viscosity of the diluted gel and regulating the flow of gel from the centrifugal diffuser to the dilution valve in order to control the viscosity of the diluted gel.

Device for diffusing a first fluid into a second fluid

Abstract: A fluid diffuser includes an inner extruded tube and an outer extruded tube between which there is a woven fabric material tube. The diffuser includes pores formed by a non-ablative piercing process and being arranged to act as valves which are self-closing when fluid is not flowing through the diffuser. The woven fabric material is arranged to restrain diametral expansion of the inner and outer tubes and thereby restrain an increase in pore size as the pressure of fluid flowing through pores is increased. Thus, if the diffuser is used for diffusing air into water, the size of bubbles produced remains substantially constant as the pressure of air supplied to the diffuser is increased. Other diffusers are described which function in a similar manner, including a disc diffuser and tubular diffusers which are made of sheet material.

Biological aerated filter

Abstract: The invention relates to a biological aerated filter. A hollow upright cylindrical tube (1, 20, 40, 60, 80, 90) is provided with an internal packing of solid support media (5, 26, 94) which provides a large surface area for supporting microbial biomass. The tube is provided with an inlet (6, 21, 41, 61, 81, 91) and an outlet (7, 22, 42, 68, 82, 92) for passage of liquid waste to be treated inside the tube. An air diffuser (4, 67, 93) having a flexible multi-perforated membrane (36) is arranged at the base of the tube. In use, a stream of air bubbles is passed upwardly from the air diffuser through liquid in the tube. The membrane of the air diffuser is sealed to the lower part of the tube so as to prevent solids passing around and below the air diffuser.

Multistage diffuser equipment

Abstract: PURPOSE:To accurately set the diffuser elevation on the land by providing vertically arranged plural diffuser members, an air feed pipe for connecting an air suction source set on the ground and the diffuser members and a switching valve for selectively supplying the air from the air suction source to the air feed pipe set on the ground. CONSTITUTION:The main body 2 of a diffuser is supported by a member having a strut 9 to which a supporting leg 8 is fixed at the lower part, vertically arranged plural diffuser members 4 are fixed to the strut 9 in the water, an air source 5 consisting of a compressor is set on the ground, the source 5 and a switching valve 7 set on the ground are connected by a first air feed pipe 6 consisting of a pressure hose, and the valve 7 and the diffuser member 4 are connected by a second air feed pipe 11 consisting of a pressure hose. The main body 2 is fixed by the leg 8 of the member 3 on the bottom of a lake 1, and air is supplied to the diffuser member 4 from the source 5 through the first air feed pipe 6, switching valve 7 and second air feed pipe 11 and diffused into the water from the member 4.

Splitter vane diffuser for a jet engine with profiled struts which serve also as outlet guide vanes

Abstract: The invention relates to a multiflow diffuser/splitter for a turbojet, the latter comprising, in succession, along its longitudinal axis of symmetry, a compressor formed of impellers (moving) and fixed guide vanes, and an annular double head combustion chamber between which are interposed a diffuser (2), and an annular flow splitter (3) placed between the inner and outer shrouds (2i, 2e) of the diffuser and fixed to these by radial structural arms (4, 40). The last guide vane (54) leaving the compressor is incorporated into the structural arms (4, 40) of the diffuser/splitter (2, 3) shaped like guide vanes.