Showing papers on "Diffuser (sewage) published in 1986"

Photographic light diffuser

Abstract: A photographic light diffuser is disclosed having a support rod and collapsible frame with a plurality of ribs and stretchers. The frame and support rod are covered by a translucent panel at one end and a reflective panel at the other end which together define an interior chamber for receiving a light source. Access to the interior is provided by one or more closeable openings in the cover.

Airfoil with diffused cooling holes and method and apparatus for making the same

Abstract: Air cooling of airfoils in a gas-turbine engine is effected through holes which terminate with a diffuser formation at the airfoil surface. The invention is directed to a two-step procedure whereby a laser beam drills the holes very quickly and cost-effectively and whereby an EDM step is relied upon only to form the diffuser shape. The EDM part of the procedure thus occupies but a fraction of the time previously required, and substantial overall economy is realized by integrating these two steps, which are preferably performed in the order stated but which, if desired, may alternatively be performed by laser driling after EDM formation of the diffuser shape.

Chemical vapor deposition reactor

Abstract: A reactor, suitable for CVD processes, which presents a high aspect ratio to reactant gasses, is described. Substrates are mounted on oppositely disposed susceptors in a vertical chimney-type reactor. Means are provided to rotate the susceptors about an axis perpendicular to gas flow. Side-loading or top-loading mechanisms are provided for loading and unloading the susceptors through a gate valve. A diffuser below the reaction zone adjusts the gas flow into the reaction zone.

Method of supplying air masses and producing jets of water

Abstract: A method is provided for use with an apparatus which produces jets of water through a vertical water diffuser tube by supplying individually formed air bubble masses at regular intervals, which are followed by the water being drawn under the action of the air bubble masses. The method improves the water processing efficiency and ability of the apparatus by defining the volumetric quantity of a formed air mass in relation to the diameter of the particular air diffuser tube and defining a certain relationship between the length L (m) of the tube through which the rises and the time interval T (sec) at which the individual air bubble masses are produced.

Diffused bubble aeration system

Abstract: A diffused bubble aeration system for small scale water supplies includes a plurality of water holding vessels having water inlet and water outlet couplings operatively coupled in series for series flow of water through the successive vessels. The inlet and outlet openings are located substantially below the normal water level in the vessels, for example, substantially at the mid section of the respective vessels for equalization of volume and water level in the vessels. The series coupled vessels, barrels or drums comprise a first vessel having a supply water inlet coupling for coupling to a water supply and a last vessel or drum with a treated supply water outlet coupling to treated water supply water pump and pressurized treated water storage tank. Each vessel or drum is assembled to constitute a diffused bubble aeration stage having a spiral coil air diffuser arranged near the bottom of the vessel but spaced from the bottom of the vessel or drum for delivering diffuse low pressure air bubbles for stripping and purging volatile contaminants from supply water in the vessel. Each vessel or drum is formed with air inlet and outlet couplings with air inlet and outlet couplings and lines operatively coupled in parallel for parallel flow of diffused air through the water in the vessels or drums. The air outlet coupling at the top of each vessel vents the contaminant laden air. The drums or vessels comprise multiple stages for staged bubble aeration and staged flow or plug flow of supply water passing through the stages. The volume capacity of the drums is selected for residence time of supply water in the multiple stages adequate for staged aeration stripping and removal of volatile contaminants to a selected limit without substantial mixing between stages during aeration and while meeting current demand for supply water.

Dimpled air distribution device

Abstract: An air distribution apparatus having a plurality of dimples, each having small openings. The dimples having small openings provide a simple structure for causing air to be discharged from the air diffuser unit parallel to the base of the unit.

Appearance fabric panel with in situ molded frame

Abstract: A relatively rigid, air permeable panel suitable, for example, as a diffuser on a hard box vacuum cleaner housing. The panel is a composite of fabric and a polymeric frame molded in situ on the fabric. The disclosed molded frame technique avoids the necessity of separate fastening means between the fabric and frame and obviates the need for edge finishing of the fabric.

Portable dust collector

Abstract: A portable dust collector which includes a housing having a dust-proof chamber, a motor and blower enclosed within the chamber, a centrifugal blower driven by the motor and exhausting through a diffuser into the housing, a filter bag enclosing the top of the housing, a collection bag enclosing the bottom of the housing, and a support extending downwardly from the housing to the base for providing clearance below the housing sufficient for the collection bag. By positioning the motor within a dust-proof chamber inside the housing, the dust collector has better balance and portability and requires less floor and storage space than prior art collectors with exterior motors. The collector also includes a diffuser which is attached to the blower outlet and is shaped to direct the effluent from the blower downwardly into the collection bag. The diffuser includes a bell-shaped passage having a flared exit opening, which is greater in area than the mouth of the diffuser attached to the blower, so that the blower effluent is reduced in noise velocity prior to entering the collection bag. The motor is oriented radially and horizontally within the housing and the blower inlet oriented horizontally so that an open space is provided for free air flow between the filter and collection bags through the housing.

Heating or air-conditioning ventilation unit for motor vehicles

Abstract: A ventilation unit for heating or air-conditioning in a motor vehicle. The unit includes a blower and a heat exchanger, with a diffuser positioned in the flow of air from the blower. The diffuser spreads the air flow so that it substantially covers the heat exchanger area. A grid positioned between the diffuser and the heat exchanger aids in spreading the flow of air to the peripheral portions of the heat exchanger.

Diffuser for volatile liquid fluids

Abstract: A diffuser for volatile liquids. The diffuser includes an absorbent carrier for accepting and diffusing a volatile liquid, a container for storing a volatile liquid, and a pointed element for piercing the perforable container to establish direct communication for flow of volatile liquid between the perforable container and the absorbent carrier.

Improvements in hollow-fibre oxygenators for blood

Abstract: In a hollow-fibre oxygenator consisting of a container (16) containing a plurality of fibres (17) joined into a bundle and open attheirendsto allow the passage into them of a first fluid (blood) and over the outside of which flows a second fluid (oxygen-carrying gas) which diffuse between them, a diffuser (1) for the second fluid is provided which consists of several arms disposed in an array and is introduced between the fibres (17) in positions close to the terminal zone of the fibres themseives.

Removing Trihalomethanes by Packed-Column and Diffused Aeration

Abstract: The performance of packed-column and diffused aeration for removing trihalomethanes from drinking water was related to water source, water temperature, contaminant concentration, and other process variables. Data obtained from this study were compared with theoretical predictions and with the results of previous feasibility studies. Based on efficiency and cost, packed-column aeration appears to be the more promising of the two technologies.

A diffuser device

Abstract: A diffuser device, suitable for receiving a flow of air and diffusing it as small bubbles into a liquid mass, comprises a porous tube (10) and a jacket (12) of hydrophobic porous plastics material surrounding the tube, the plastics material being in the form of a multi-layer winding of tape (11) each turn overlapping the preceding turn.

Demonstration of a Submerged Diffuser for Dredged Material Disposal

Abstract: The availability of upland sites for dredged material disposal has become increasingly limited. Open-water disposal is one option available to address this problem, but broader environmental questions frequently must be treated at open-water sites especially when handling contaminated sediments. The Water Resources Engineering Group of the US Army Engineer Waterways Experiment Station (WES) has been evaluating alternative methods and technologies to enhance the environmental acceptability of open-water disposal. This paper describes a field study of a submerged diffuser operated during a demonstration of innovative dredging and disposal technologies. Monitoring during the study included measurement of current velocities and suspended solids before and during the diffuser operation. Results indicate that the diffuser can be useful in limiting the initial dredged material movement, improving placement accuracy and reducing the extent of suspended solids at the discharge point.

Diffuser instrument for dental apparatus for polishing the teeth by spraying powdered particles and pressurised water

Abstract: This instrument comprises, on the one hand, a rigid tube 3 for conveying particles which projects from a handpiece 2, 5 and, on the other hand, a diffusion nozzle 6, of tubular form, one end of which is fixed to the handpiece and the other end of which is fitted with a central tube 10 which, intended to be engaged in a leak-tight manner on to the rigid tube 3 for conveying particles, delimits with the wall of the nozzle an annular passage for conveying pressurised water. Application to making a device for dental care.

Apparatus for washing packing member in catalytic oxidation tank

Abstract: PURPOSE:To enable rational washing by releasing the excessive biological membrane adhered to and grown on a packing member at stroke, by acting air bubbles diffused from a diffusion pipe on the entire bottom surface of the packing member and equally washing the perforations of the packing member over the entire region thereof by said air bubbles CONSTITUTION:A packing member 2 such as a honeycomb tube having a desired width, height and thickness is arranged in a catalytic oxidation tank and a single-side or both-side revolving system is employed to recirculate water to be treated in the tank from the part above the packing member 2 to a downward direction by an air diffusion member 3 such as a diffuser to purify sewage Further, a large number of air diffusion pipes 5 parallel to the surface of water are arranged along the stream of water to be treated at required intervals over the entire region between the packing member 2 and the tank bottom In this case, the relation between the total area S1 of the air diffusion orifices 6 provided to each air diffusion pipe 5 and the cross-sectional area S2 of the inner diameter of each air diffusion pipe 5 is at least set to S1<=S2 and, further, the distance between the adjacent air diffusion orifice 6 is set to a range of 20cm or less As a result, the excessive biological membrane adhered to and grown on the packing member is released at a stroke

Fuel gasification apparatus

Abstract: PURPOSE:An apparatus, equipped with the respective specific combustor part, diffuser part, reductor part and nozzle, and capable of providing adaptability responsive to many kinds of coal and gasifying even coal dust and slurry at the same time. CONSTITUTION:A fuel gasification apparatus equipped with a combustor part 3 for burning a fuel, diffuser part 4, positioned thereon, communicating thereto, and capable of dry distilling and thermally decomposing the fuel and mixing the fuel with a high-temperature gas fed from the combustor part 4, reductor part 5, positioned on the diffuser part 4 communicating thereto and capable of carrying out an endothermic gasification reaction and gasifying carbon particles fed from the diffuser part 4 and further a nozzle feeding coal dust, a slurry fuel and heavy oil solely and respectively to the combustor part 3 and diffuser part 4.

Apparatus for water oxygenation

Abstract: There is described a mobile device for enriching oxygen-deficient water of a watercourse with oxygen gas or with a gas containing oxygen The gas is contained in a tank (4) in compressed form The arrangement is located on a float (1) The gas is passed from the tank to a diffuser (6) via evaporators (5) The diffuser is arranged on a broad side of the float and can be shifted in the vertical direction in such a way that it is either above or below the water level The diffuser preferably has at least one Venturi tube

Studies on Performance and Internal Flow of Twisted S-Shaped Bend Diffuser—The So-Called Coiled Bend Diffuser: 1st Report

Abstract: This paper is the result of our research into the twisted S -shaped bend diffuser—the so-called coiled bend diffuser. It is a diffuser with a centerline in the shape of a twisted “S .” Our studies show that the performance characteristics of this bend diffuser are greatly improved when interaction by the bend elements generates an adequate secondary flow inside the diffuser. Full consideration was given to the influence of the divergent angle of the bend elements, consisting of the diffuser or curvature radius ratio of the bend, on these performance characteristics. The relation between diffuser performance and internal flow also was studied. Some guidelines for designing such a high performance diffuser is given.

Spray device for a domestic dishwasher

Abstract: To improve a spray device having a water inlet which is connected to the pressure nozzle of a circulation pump and bears a fixed tubular section which tapers to form a jet, having a diffuser tube which is arranged downstream of the jet and whose inlet aperture is arranged downstream of the jet outlet aperture in the direction of flow and approximately corresponds to said jet outlet aperture in cross-section, and having a spraying arm which is fixed to the widened outlet of the rotatable diffuser tube and can be set in rotation by the water pressure, it is proposed that adjacent flanges (5, 8), tube tapers or the like of the fixed tubular section (2) of the jet and of the rotatable diffuser tube (6) have bypass apertures (10) in addition to the central jet outlet aperture (4) and the central diffuser tube inlet aperture (7), and that the cross-section of the central jet outlet aperture (4) and of the central inlet aperture (7) of the diffuser tube (6) is designed to correspond to the flow volume required to drive the spraying arm (9).

Optical devices using optical fibres

Abstract: A low loss light diffuser is comprised by an optical fibre input (8) whose output end (9) is disposed within an assembly of small particles such as microspheres (12). An optical signal applied to the fibre is uniformally diffused by multiple fresnel reflections at the surfaces of the small particles.

Treatment of excessive sludge

Abstract: PURPOSE:To prevent the increase in stickiness, by mixing fresh water with sludge in an amount 2-10 times that of excessive sludge before or immediately after flowing sludge into a sludge aeration tank. CONSTITUTION:Org. waste water is supplied to an aeration tank 2 and air is blown in the aeration tank 2 by a blower B and an air diffuser 2a to purify activated sludge. Excessive sludge is supplied to a sludge aeration tank 8 from a flow line 7 and fresh water is mixed in excessive sludge immediately before or immediately after flowed in the sludge aeration tank 8 from a flow line 9 in an amount 2-10 times that of excessive sludge. Air is blown in the sludge aeration tank 8 by a blower B and an air diffuser 8a to reduce the amount of excessive sludge. The excessive sludge subjected to amount reduction treatment is supplied to a sedimentation tank 10 and supernatant water is sent to a flocculative sedimentation tank 4 through a flow line 11.

Diffuser for an arc discharge lamp

Abstract: A diffuser for an arc discharge lamp having a sealed envelope of light-transmitting vitreous material including at least two longitudinally extending leg members spaced a predetermined distance thereapart and joined together by a transversely extending envelope portion. The diffuser is formed for disposal adjacent the leg members in a predetermined alignment to provide an appearance of a substantially uniform light output from the entirety of the envelope during operation of the lamp. Preferably, the diffuser includes a longitudinally bifurcated member having two leg sections joined together by an intermediate section and can easily be attached to the arc discharge lamp and subsequently removed therefrom upon failure of the lamp.