Showing papers on "Diffuser (sewage) published in 2010"

Semiconductor processing reactor and components thereof

Abstract: A reactor having a housing that encloses a gas delivery system operatively connected to a reaction chamber and an exhaust assembly. The gas delivery system includes a plurality of gas lines for providing at least one process gas to the reaction chamber. The gas delivery system further includes a mixer for receiving the at least one process gas. The mixer is operatively connected to a diffuser that is configured to diffuse process gases. The diffuser is attached directly to an upper surface of the reaction chamber, thereby forming a diffuser volume therebetween. The diffuser includes at least one distribution surface that is configured to provide a flow restriction to the process gases as they pass through the diffuser volume before being introduced into the reaction chamber.

Syngas fermentation to biofuel: evaluation of carbon monoxide mass transfer coefficient (kLa) in different reactor configurations

Abstract: Lignocellulosic biomass such as agri-residues, agri-processing by-products, and energy crops do not compete with food and feed, and is considered to be the ideal renewable feedstocks for biofuel production. Gasification of biomass produces synthesis gas (syngas), a mixture primarily consisting of CO and H(2). The produced syngas can be converted to ethanol by anaerobic microbial catalysts especially acetogenic bacteria such as various clostridia species.One of the major drawbacks associated with syngas fermentation is the mass transfer limitation of these sparingly soluble gases in the aqueous phase. One way of addressing this issue is the improvement in reactor design to achieve a higher volumetric mass transfer coefficient (k(L)a). In this study, different reactor configurations such as a column diffuser, a 20-μm bulb diffuser, gas sparger, gas sparger with mechanical mixing, air-lift reactor combined with a 20-μm bulb diffuser, air-lift reactor combined with a single gas entry point, and a submerged composite hollow fiber membrane (CHFM) module were employed to examine the k(L) a values. The k(L) a values reported in this study ranged from 0.4 to 91.08 h(-1). The highest k(L) a of 91.08 h(-1) was obtained in the air-lift reactor combined with a 20-μm bulb diffuser, whereas the reactor with the CHFM showed the lowest k(L) a of 0.4 h(-1). By considering both the k(L) a value and the statistical significance of each configuration, the air-lift reactor combined with a 20-μm bulb diffuser was found to be the ideal reactor configuration for carbon monoxide mass transfer in an aqueous phase.

Apparatus for cooling overheated gas in engine room

Abstract: An apparatus for cooling overheated gas generated from a diesel particulate filter which is connected between a diesel engine and an exhaust pipe of the diesel engine is disclosed. The apparatus includes a tail pipe for discharging outwardly the overheated gas discharged from the diesel particulate filter, a cooling fan, provided at one side of an engine room, for generating an air stream by sucking ambient air, and a diffuser enclosing an outer circumference of the tail pipe in such a way a space is formed between the diffuser and the tail pipe to prevent the diffuser from directly contacting the tail pipe. The engine room is provided with a through-hole penetrating one side of the engine room, and the tail pipe has one end connected to the diesel particulate filter, and the other end extended outwardly from the engine room through the through-hole.

Diffuser using detachable vanes

Abstract: A system, in certain embodiments, includes a plurality of detachable, three-dimensional diffuser vanes attached to a diffuser plate of a centrifugal compressor. In certain embodiments, the detachable, three-dimensional diffuser vanes may be attached to the diffuser plate using threaded fasteners. In addition, dowel pins may be used to align the detachable, three-dimensional diffuser vanes with respect to the diffuser plate. However, in other embodiments, the detachable, three-dimensional diffuser vanes may include a tab configured to fit securely within a groove in the diffuser plate. In addition, the tabs of the detachable, three-dimensional diffuser vanes may include indentions that mate with extensions extending from the diffuser plate, wherein the tabs may slide into slots between the extensions and the grooves of the diffuser plate.

A Newly Designed Supply Diffuser for Industrial Premises

Abstract: The results of this investigation revealed the airflow distribution from a new design of supply diffuser under non-isothermal conditions. To illustrate the indoor climate parameters in the occupied ...

Device for cleaning a component of a dryer and dryer having such a device

Abstract: The invention relates to a device for cleaning a component (4) of a dryer (1) having a liquid rinsing medium, comprising a diffuser (9) for distributing the rinsing medium disposed over the component (4), wherein the diffuser (9) comprises a distribution channel (12) extending over the width thereof for distributing the rinsing medium introduced into the diffuser (9) and a transition region (13) fluidically connected to the distribution channel (12), by means of which the rinsing medium can be fed downward in the vertical flow direction P4 to the component (4). The invention further relates to a dryer having such a device.

Separation control in a conical diffuser with an annular inlet

Abstract: In many practical applications of conical diffusers, the flow is fed by an annular flow passage formed by a center body. Flow separation, which occurs if the center body ends abruptly, is undesirable because it degrades the diffuser performance. The present experiment utilizes magnetic resonance velocimetry to acquire three-component mean velocity measurements for a set of conical diffusers with an annular inlet. The results show strong coupling between the diffuser wall boundary layer development and the wake of the center body. Coanda blowing is used to mitigate the center body wake separation. The diffuser wall boundary layer is thick in the absence of the central separation bubble and separates when Coanda blowing is too strong.

Foam generator for dedusting coal mine

Abstract: The invention relates to a foam generator used for coal mine underground dust removal, mainly comprising a cylinder body, a Venturi tube, a spoiler, baffle plates and so on, wherein, the cylinder body is a cylinder; the Venturi tube is arranged inside the cylinder body; a diffuser of the Venturi tube is uniformly provided with a certain number of air inlet pores; the spoiler is a hollow cone and is horizontally arranged inside the space of the diffuser of the Venturi tube and fixed on the cylinder body by a support; a plurality of pores are arranged on the surface of the spoiler; the baffle plates are arranged on the rear of the foam generator. Gas enters from the side face of the cylinder body of the foam generator; foam liquid flows into the foam generator through a pipe on the front end of the foam generator; the flow velocity of the foam liquid is increased when the foam liquid passes through the throat section of the Venturi tube, and jets are formed; gas uniformly enters from the pores of the diffuser of the Venturi tube, and the gas and the liquid are fully mixed after passing through the spoiler and a plurality of baffle plates, consequently two-phase foams are generated. The foam generator used for coal mine underground dust removal has the advantages of stable structure, convenient use, light weight, small volume, no blockage and good foaming effect.

Radial diffuser vane for centrifugal compressors

Abstract: Devices, systems and methods according to exemplary embodiments provide diffusers, e.g., as part of a turbo machine 300, with diffuser vanes having S-shaped camber lines 408. Such S-shaped camber lines 408 are defined by functions having an inflection point. Using diffuser vanes 400 having such shapes results in, among other things, an operation characteristic wherein a portion of the diffuser vanes 400 disposed near a leading edge 402 is substantially unloaded when operating at design conditions and wherein the load gradually increases to a maximum loading value towards a middle portion of the diffuser vanes.

Sewage treatment apparatus and operation method of sewage treatment apparatus

Abstract: PROBLEM TO BE SOLVED: To provide a sewage treatment apparatus which keeps DO of a membrane separation tank a suitable value, controls generation of a causative agent of membrane fouling, and further maintains denitrification reaction in an anaerobic tank and phosphorous release reaction in an aerobic tank a good state SOLUTION: The sewage treatment apparatus includes an aerobic tank 3 which has an air diffuser 5 and aerobically treats a water to be treated by a microorganism, a membrane separation tank 4 which is arranged in the latter step of the aerobic tank 3 and has a membrane separation apparatus 6 for solid-liquid separating the water to be treated, and a first circulation passage 8 for making the water to be treated in the membrane separation tank 4 circulate to the aerobic tank 3, wherein the sewage treatment apparatus includes a first measuring apparatus 20 for measuring an indicator of the aerobic treatment in the membrane separation tank 4, and a first control apparatus 21 which adjusts a circulation amount of the water to be treated through the first circulation passage 8 based on a measured value by the first measuring apparatus 20 COPYRIGHT: (C)2010,JPO&INPIT

Aerated bathroom fixture

Abstract: Disclosed herein is a novel feature of a toilet for reducing the density of the fluid in the bottom portion of a bathroom fixture to eliminate spray when desired. When not desired, for example, when a user is seated upon the bathroom fixture, this feature may be deactivated. In one form, when the anti-spray feature is turned off, the bubbles will have substantially disappeared in less than a few seconds. The bathroom fixture (toilet) is provided with an air source, such as an air pump, compressed air cylinder, or compressor, coupled by way of an air line or hose to an air diffuser chamber. When the air source is activated, a substantial portion of the water in the air diffuser chamber will be displaced by the air provided by the air source. The vertical region of bubbles within the standing water reduces the density of the water in that region, such that splash is virtually eliminated.

Furnace burner box

Abstract: An HVAC burner box includes a burner bank, a manifold and an air director located within an enclosure. The burner bank is oriented such that an outlet end of the burner bank is directed toward a first end of the enclosure. The manifold is located within the enclosure and adjacent an inlet end of the burner bank. The air director has a diffuser that is coupled to a side of the enclosure. The diffuser includes a plurality of openings located therethrough. The diffuser is configured to direct a first portion of a received airstream through the opening and toward the burner bank. The diffuser is further configured to send a second portion of the received airstream toward the manifold.

Method and apparatus for a bwr jet pump support system

Abstract: A method and apparatus for applying a lateral restraining force to a diffuser or an inlet mixer of a Boiling Water Reactor (BWR) jet pump restrainer assembly, to pull the diffuser or inlet mixer toward a centerline of a riser pipe. The lateral restraining force may be applied to just a diffuser, or just an inlet mixer, or both. Clamps are attached to the diffuser or inlet mixer, and alternatively to the riser pipe, and draw bolts are connected to the clamps to provide the necessary restraining force. The lateral restraining force either mitigates damage and repair to a conventional jet pump restrainer assembly, or alternatively is used in lieu of a jet pump restrainer assembly.

Electric blower and electric vacuum cleaner

Abstract: PROBLEM TO BE SOLVED: To reduce the loss of an air flow passing from a rotary fan through a diffuser part when changing its direction to the side of a motor (to the inside) to cool the motor. SOLUTION: A commutator 6 is arranged between the rotary fan 9 and a rotor 4 (a stator 5). Thus, a distance between the rotary fan 9 and the rotor 4 (the stator 5) is increased to moderate the curve of an air trunk (a return air trunk 14) ranging from a diffuser part 12 to the motor 2. COPYRIGHT: (C)2010,JPO&INPIT

Energy saving in activated sludge plants by the use of more efficient fine bubble diffusers.

Abstract: Many activated sludge plants (ASP) use fine bubble diffused air as their source of oxygen. Blowers are attached to air pipework, which distributes air to a network of diffusers installed on the floor of the ASP tank. Modern diffusers are made from a rubber membrane which flexes to allow fine bubbles of air to pass through holes in the diffusers which then pass into the mixed liquors in the tank. The diffusers come as circular discs, tubes and more recently mats or panels. Yorkshire Water is in the process of building new ASP at some of their biggest sewage treatment works to meet new final effluent consent standards associated with the freshwater fisheries directive (FFD). These new works will treat sewage from a combined population of over two million people in the Yorkshire area. Black & Veatch is involved in some of the first works to have a new type of fine bubble diffuser installed in the ASP basins. These diffusers resemble a mat or panel and are fixed to the floor of the tank as opposed to circular and tubular diffusers which as fixed above the floor. Oxygen transfer testing has been carried out to show the efficiency of these aeration systems, which may offer significant savings in operating costs to water operators. This paper examines the results from the tests and compares them with other tests carried out in the United States and tests that have been carried out on other types of diffusers. The paper will discuss the results of the oxygen transfer tests and present capital and net present costs (NPC) for various diffuser installations.

Lighting Arrangement Using LEDs

Abstract: A lighting arrangement using LEDs that has an elongated translucent diffuser having a flat upper surface along the length of the diffuser. The transverse cross-section of the elongate translucent diffuser may have various shapes, all having substantially flat tops, including but not limited to quadrangular, rectangular, trapezoidal, and non-isosceles variations of these shapes. The elongated translucent diffuser is mounted on an elongated housing of substantially the same length to support the diffuser. The elongated housing may be solid or hollow and may contain the LEDs and circuit board, or the LEDs and circuit board may be contained within the elongated translucent diffuser. The LEDs are configured to transmit light through the diffuser so that the emitted light simulates light from a traditional neon tube.

Gas turbine and method for cooling gas turbine

Abstract: PROBLEM TO BE SOLVED: To provide a gas turbine which suppresses increase in the amount of cooling air used to control a clearance because the high temperature components of the gas turbine are cooled by air extracted from a compressor and air supplied by a blower separately placed whereas power is needed to supply the air extracted from the compressor and the cooling air supplied by the blower and the increase in the number of components to be cooled increases the consumption of the cooling air, resulting in the reduced performance of the gas turbine.SOLUTION: In the gas turbine which comprises a turbine casing cooling path provided to the casing of the gas turbine and an exhaust diffuser cooling path provided to the exhaust diffuser, there is formed at least one path through which a coolant flows from the turbine casing cooling path into the exhaust diffuser cooling path.

Liquid aroma injector

Abstract: A liquid aroma injector for a spa having a reservoir comprising an upper chamber, a lower chamber, and a subchamber, a plunger assembly comprising a plunger button, a shaft, and an annular flanged gasket. The shaft extends through said upper and lower chamber of the reservoir. The liquid aroma injector further comprises a hose through which liquid aroma travels to the liquid aroma diffuser that releases liquid aroma into the water of a spa.

Blade excitation reduction method and arrangement

Abstract: An impeller shroud is configured to receive an impeller. The impeller shroud establishes a plurality of air-bleed holes configured to communicate air with an impeller. The air-bleed holes are circumferentially distributed about the impeller shroud. The circumferential spacing between some adjacent air-bleed holes within the plurality of air-bleed holes is different than the circumferential spacing between other adjacent air-bleed holes within the plurality of air-bleed holes. A diffuser vane is configured to direct pressurized air to the combustor, the diffuser vanes are circumferentially distributed about the blade exducer. The circumferential spacing between some adjacent diffuser vanes within the plurality of diffuser vanes is different than the circumferential spacing between other adjacent diffuser vanes within the plurality of diffuser vanes.

Advanced airborne fire fighting system

Abstract: A system for dispersing liquid over a desired location, the system comprising a pressurized tank having a main body, an inlet in fluid communication with the main body for introducing liquid to the main body, an outlet in fluid communication with the main body for dispersing the liquid, and an air inlet for charging air under pressure into the main body, where the improvement comprises providing a diffuser for slowing down pressurized air entering the main body from the inlet.

Air conditioning device for kitchen

Abstract: The utility model relates to an air conditioning device, in particular to an air conditioning device for a kitchen The traditional in-kitchen air conditioner is inconvenient to use and short in service life The air conditioning device provided by the utility model comprises an outdoor unit and an indoor unit connected with the outdoor unit, wherein, an air outlet end and an air return end are formed on the indoor unit The utility model is characterized in that the air conditioning device further comprises oil fume filters matched with the air return end on the indoor unit, air outlet pipes matched with the air outlet end on the indoor unit, air outlet devices matched with the air outlet pipes and a plurality of keels, wherein, the indoor unit, the oil fume filters and the air outlet devices are all fixed on the keels, ends of the air outlet pipes are connected to the air outlet end on the indoor unit, the other ends of the air outlet pipes are connected to the air outlet devices, each oil fume filter comprises a filter panel, an inlet air diffuser fixed on the filter panel and a filter screen fixed on the inlet air diffuser, and the filter screen is positioned above the inlet air diffuser The utility model has the advantages of reasonable structure and design, long service life and convenient installation and disassembly