Showing papers on "Diffuser (sewage) published in 1980"

Air diffuser for a hair dryer

Abstract: A diffuser for a hair dryer reduces the force of impact of air discharged from the hair dryer against the hair of a user. The diffuser includes a housing having an inlet port, an outlet port and a freely rotatable fan blade mounted within the housing. The inlet port is removably interconnected to the discharge nozzle of a hair dryer so that air discharged from the hair dryer enters the housing, strikes the fan, and causes it to rotate. The rotating fan disperses the discharged air into a plurality of diversely directed eddy currents which flow out of the outlet port. These less powerful eddy currents, which are applied to the hair of a user, will not upset the setting of hair. A screen can be interposed between the fan and the outlet port to prevent hair from becoming caught in the diffuser and to further disperse the eddy currents of air before they are discharged from the outlet port. Finger spacers can be mounted on the diffuser to keep the head of the user a predetermined distance away, and an adapter can be provided so that the size of the inlet port is adjustable to snugly receive different sized discharge nozzles of different hair dryers.

Variable geometry device for turbine compressor outlet

Abstract: A variable geometry device is provided for use with the compressor outlet of a turbine engine. The turbine engine includes a support housing, a compressor contained within the support housing and having a compressed air outlet and in which a pair of spaced walls define an annular and radially extending diffuser passageway. The inner end of the diffuser passageway is open to the compressed outlet while the outer end of the diffuser passageway is open to the combustion chamber for the turbine engine. A plurality of circumferentially spaced diffuser vanes are mounted to one of the diffuser walls and protrude across the diffuser passageway. An annular recessed channel is formed around the opposite diffuser wall and an annular ring is mounted within the channel. A motor is operatively connected to this ring and, upon actuation, displaces the ring transversely across the diffuser passageway to variably restrict the diffuser passageway. In addition, the ring includes a plurality of slots which register with the diffuser vanes so that the vane geometry remains the same despite axial displacement of the ring.

Compressor diffuser and method

Abstract: An improved diffuser for fluid flow compressors which utilizes alternately swept diffuser vanes.

Hair dryer diffuser

Abstract: A diffuser attachment which is telescopically assembled to the air outlet end of a hand-held hair dryer and which is characterized by a forwardly flared body portion and by a diffuser plate concentrically mounted within the flared body portion and having a convex surface facing the flow of heated air from the hair dryer.

Mixing device for viscous liquids

Abstract: An improved mixing device for viscous liquids includes an elongated body with an opening extending axially through the entire length of the body An elongated diffuser is located in the opening with pathways therein for forming a circuitous path for mixing viscous liquid flowing under pressure through the opening There are stops associated with both ends of the diffuser for holding it in place in the opening when liquid is flowing through the diffuser At least one of the stops is removable and includes female threads which cooperate with male threads on the outer surface of the body so that when the stop is removed the diffuser can be axially removed from the opening through at least one end thereof, an end of the diffuser being accessible through the other end of the opening and shaped so that an axial force can be applied to remove the diffuser, if necessary

Diffuser and exhaust gas collector arrangement

Abstract: In a gas turbine engine having a diffuser provided downstream of the power section and composed of inner and outer diffuser wall members forming therebetween a diffuser chamber which is open into an exhaust gas collector chamber, the outer diffuser wall member is provided with at least one flow guide member which extends on the generally frustoconical outer peripheral surface of the outer diffuser wall member and which is curved arcuately or circularly about the common center axis of the inner and outer diffuser wall members for thereby suppressing formation of vortices in the flow of the combustion gases being exhausted through the collector chamber.

Nucleation and evolution of slag droplets in coal combustion

Abstract: Nucleation and droplet growth were analyzed for the slag vapor and droplet ridden combustion gas stream in an MHD channel. Numerical solutions were obtained for environments representing the flows through the channel and diffuser. It was found that the partial differential equation governing the droplets is very unstable because of the precipitous manner in which the nucleation rate varies and the strong dependence of the droplet growth rate on the droplet size. This difficulty was circumvented by a logarithmic transformation of the independent variable, r. The numerical solutions showed that evolution of the droplet size distribution proceeds through a succession of rather delicate balances between the size-dependent condensation and evaporation rates and the nucleation rate. These balances are largely dictated by the supersaturation ratio. Growth at an early stage of the submicron size droplets and the subsequent nucleation of the extremely small droplets engender a bimodal size distribution at the end of the channel or at the beginning of the diffuser depending on the supersaturation ratio. This bimodal nature is preserved through the diffuser. Higher slag mass content of the gas stream was found to result in a more pronounced bimodal distribution at the end of the diffuser. Also, themore » higher slag content was found to accelerate the growth such that the entire spectrum is squeezed toward the larger-radius region of the size spectrum. Consequently, the average size of the droplets is larger at the end of the diffuser when the slag content is raised.« less

Bag-type filter apparatus with venturi-supported air diffuser

Abstract: The invention is directed to the more effective cleaning of filter bags in a filter apparatus of the type having tubular venturis extending into the outlet ends of tubular supporting cages for the respective filter bags. Generally, such filter bags are cleaned by a periodic reverse flow of a jet of air into each venturi and thus through the filter bag. To enhance the cleaning of each filter bag, the present invention provides a hollow, perforated air diffuser tube communicatively connected to, supported by and extending from each venturi and longitudinally within the respective tubular cage and its surrounding filter bag so that, when a reverse flow of a jet of air is directed into the filter bag via the venturi, the diffuser tube diffuses and distributes the air throughout the filter bag so as to dislodge filtered particles along the length of the filter bag.

Bag-type filter with air diffuser tubes of helical construction

Abstract: A bag-type filter apparatus, whose elongate tubular filter bags are supported by tubular cages therewithin, is provided with an air diffuser tube extending longitudinally within each tubular cage for diffusing and distributing a periodic reverse purge air flow throughout each filter bag to dislodge from the exterior surface of each filter bag particulate material which normally collects on the filter bags Each air diffuser tube is formed from a perforate strip of helically wound sheet metal, adjacent edges of which are interconnected by a seam in which such adjacent edges overlap each other in interlocking relationship so that the seam extends helically around the respective air diffuser tube

Gas diffuser, aerator, or sparger method

Abstract: Disclosed is novel apparatus and method for introducing various gasses into liquids. This as is commonly done in aerating or oxygenating liquids where growing aquatic life such as fish; instances concerning lagoon and pond treatment, absorption of oxygen in sewage or sewage-activated sludge mixture, introduction of chlorine or carbon dioxide gas into water for chemical treatment thereof. The method includes water treatment comprising the improved diffuser, aerator or sparger apparatus with the result of substantial enlargement in the known beneficial effects of such treatments; also, substantial and unexpected attendant benefit attributable to function of the diffuser apparatus. Principally the apparatus and method reduces the viscosity of water reducing the hydrogen bonding thereof at the time when presented for gas absorbtion. This when utilizing gas for aqueous liquid treatment or treatment of water with suspended pollutants.

Air diffuser assembly

Abstract: The apparatus of the present invention would relate to an air diffuser assembly which would comprise an aerator body having a plurality of side walls connected to form an enclosure and at least a pair of intersecting angularly oriented side walls forming an air container envelope for retaining an air volume therewithin. It would also have an air inlet adapted to convey air into said air body at the air container envelope, and a plurality of tear-shaped openings being provided in the body below the air container envelope allowing air to discharge air from the body through the tear-shaped openings, with each of the tear-shaped openings providing an upper pointed portion which would minimize the bubble size of air discharged through the openings. The apparatus would also comprise a baffle plate mounted within the enclosure at the air inlet, the baffle plate preventing the short circuit travel of air received by said enclosure to the tear-shaped openings placed on the body adjacent the air inlet. There would also be included an attachment means associated with the air inlet for attaching the aerator body to an air conveying conduit.

Sludge concentrating device

Abstract: PURPOSE: To suppress and prevent the floating and concentrating of sludge by charging the sludge after aeration into the concentrating vessel of a sludge concentrating device provided with the sludge concentrating vessel, an inflow means for the charging sludge, a concd. sludge withdrawing means, and a separated liquid discharge means. CONSTITUTION: The sludge flowing in through a sludge inflow pipe 2 is aerated in a sludge aerating section 16. More specifically, a gas such as air is supplied from a blower 13 through an air diffusion pipe 14, and the air from an air diffuser 15 forms bubbles, thereby aerating the sludge. The waste gas of the aeration is released into the atmosphere through a waste gas pipe 18, or is subjected to a certain deodorization treatment. Thus, the anaerobic gas is removed from the sludge by the aeration operation in the section 16. The sludge after the aeration treatment is supplied through a sludge transport pipe 19 by a sludge pump 29 into a sludge concentrating vessel 3, where it is subjected to solid- liquid separation to the settled and concd. sludge and the separated liquid. COPYRIGHT: (C)1982,JPO&Japio

Air diffuser of purifying tank

Abstract: PURPOSE:To obtain the air diffuser of less installation area and less blast resistance of a blower by disposing the blower to the manhole part of the purifying tank and leading the air diffusion pipe from the blower out to the bottom of the purifying tank. CONSTITUTION:The air diffuser is formed by providing a housing recess 10 provided with a base plate 11 in the recess of its bottom to the cover 7 of the manhole 8 of the purifying tank 1 buried in the ground, installing a blower (e.g., diaphragm pump) 2 to the above-mentioned substrate 11 and communicating the suction pipe 14 of the blower 2 to the suction side silencing tank 3a and the discharge pipe 15 to the air diffusion pipe 4 opened at the bottom of the purifying tank 1 by way of the discharge side silencing tank 3b.

Chemically fuelled laser and method for increasing the efficiency of such lasers

Abstract: The efficiency of a chemically fuelled laser with regenerative cooling of its combustion chamber is increased by using the fuels as coolant in the diffuser. The heat resulting from this cooling in the diffuser is supplied in a regenerative manner to the combustion chamber or rather to the laser gas.

Drilling system incorporating inverse mud circulation - comprises raising debris-laden mud to surface by depression created in upper part of train of rods by air injection

Abstract: A device for operating a drilling process, in which the drilling mud is raised to the surface inside the train or rods by means of a depression created in the upper part of the train or rods by injection of air into the mud, incorporates a head at the upper part of the train of rods, formed by an inner pipe for the passage of drilling mud loaded with debris and an annular part into which the air is injected. The lower part of the head is connected to a double tubing provided with an air diffuser. Communication of the annular space of the double tubing with the inner tube is effected by means of clack valves disposed on a pipe of the diffuser connected to the inner tube and giving passage to the air when the press. of injected air is greater than the press. of the mud in the diffuser pipe. The diffuser pipe is connected to the train of rods, to the lower end of which the drilling tool is fixed.

Treatment method of polluted water

Abstract: PURPOSE:To clarify polluted water effectively by the procedure in which polluted water to be treated is subjected to aeration treatment, part of coagulated flocs with a cogulant is sent back to the aeration tank, and the separated supernatant liquor is filtered, sterilized, and discharged. CONSTITUTION:Original polluted water supplied to the receiving tank 1 is homogenized with stirring 3 and then sent to the aeration tank 4 where it is mixed and aerated with fine bubbles of air coming out of the diffuser 6 and the treated polluted water is sent to the mixing tank 8. In the tank 8, a fixed concentration of a coagulant prepared by mixing a certain amount of water and a high-molecular coagulant in the attendant coagulant dissolution tank 9 is supplied and mixed with the treated polluted water to form coagulum. The coagulum-mixed polluted water formed in the mixing tank 8 is then overflowed into the precipitate separation tan 12 and allowed to stand, and the separated supernatant liquor is filtered by the filtering tank 13 consisting of the tanks 14 and 15 with different filter mediums. On the other hand, part of the coagulum formed is sent back to the aeration tank 4, and clarified water obtained in the filtering tank 13 is stored once in the clarified water storage 17 and then used as a concentration regulating water for the tank 4 and also is discharged after being passed through the sterilizer 19.

Clarification tank for night soil

Abstract: PURPOSE:To perform completely the biological treatment of high-concentration polluted water by the procedure in which the inside of outer tank is divided into a separation chamber, a mixing chamber, and a aeration chamber by partition plates, the aeration chamber is provided with a flow guide plate and also its bottom is provided with a sedimentation chamber, and sludge is flowed toward the upper and lower parts of a contact oxidation plate provided at the cental part. CONSTITUTION:The inside of the outer tank 1 is provided with the partition plates 2 and 3 at intervals to divide it into the separation chamber 4, the mixing chamber 5, and the aeration chamber 6. The aeratin chamber 6 is also provided with the flow guide plate 6 at right angle to the partition plate 3, inclined toward the outer tank 1 side, and concaved on the partition plate 3 side at the water surface portion, and also its bottom is provided with the sedimentation chamber 9 leading to the aeration chamber 6. And, the central part of the aeration chamber 6 is provided with the contact oxidation plate 10, the upper and lower parts of or before and after which polluted water is flowed by an air jet from the diffuser pipe 11 on the opposite side of the flow guide plate 7 in order to completely treat high-concentration polluted water biologically. Also, the partition plate 3 is given the through holes 12 and 13 to circulate the polluted water to the aeration chamber 6 and the mixing chamber 5, thus keeping the concentration of polluted water constant and also preventing troubles with blocking, etc.

The Hybrid Diffuser

Abstract: A vortex controlled diffuser has recently been reported (1), which attained high levels of pressure recovery within a short length. This diffuser has, however, achieved only a limited application because of its bleed-off requirements. The present work indicates a means by which this disadvantage can be overcome by using a hybrid arrangement of conventional and vortex controlled diffusers. The outcome was an efficient diffuser, half the length of the equivalent conical diffuser, and which would operate satisfactorily without either bleed-off or vanes projecting into the flow.Copyright © 1980 by ASME

Purification of polluted water

Abstract: PURPOSE:To purify polluted water by performing concurrently both activated sludge treatment and denitrification treatment by providing a denitrification chamber having holes on its outside surface in a slow and inactive oxidation zone at the central part of aeration tank CONSTITUTION:When a polluted water, eg, urban sewage, night soil, etc, is introduced from the inflow pipe 12 into the aeration tank 11 and then air is blown into the tank by the air diffuser 15, the polluted water makes a spiral movement along the inside wall surface of the aeration tank 11 and meets with activated sludge to undergo denitrification treatment And the spirally flowing polluted water and part of activated sludge enter through the water path opening 17 in the outside wall surface of the denitrification chamber 16 into the denitrification chamber 16 by means of the flowing water energy to undergo denitrification treatment by denitrifying bacteria Thus, polluted water can be purified by performing concurrently both activated sludge treatment using a vigorous spiral flow and denitrification treatment using a super slow flow in the same tank

Waste water purifier

Abstract: PURPOSE:To economically provide good quality water in a compact space, a rotary disk type purifier is connected with a natural purifier with aeration mechanism in which are immersed a number of frames fixed with a given number of string type contact material. CONSTITUTION:A number of small loop strings 9 are attached to frames 11 to form string type contact material 10 and extended to be fixed. A given number of these contact materials 10 are vertically placed in the treatment bath 12 to be immersed in waste water 5. The so constructed purifier is supplied with waste water 5 which has been treated by a rotary disk type purifier and contains SS component by microbe membrane removal, and the waste water 5 is subjected to aeration by use of diffuser tubes 13, whereby the contact material 10 quickly traps minute microbes in the waste water 5. Further, the contact material 10 vibrates in the water 5 to quickly treat base materials such as organic material due to the work of various microbes, digesting microbes excessively propagated and decayed microbes. Thus, the process provides a compact water treatment equipment.

Low nox mixture burner

Abstract: PURPOSE:To reduce the generation of NOX at both finely pulverized coal and oil burning times by burnign primary and secondary airs and finely pulverized coal so as to produce primary and secondary flames without strong swirl when exclusively burning the coal and blowing two stage combustion airs when exclusively burning the coil. CONSTITUTION:When exclusively burning finely pulverized coal, the coal is conveyed from an annular diffuser 1 via primary air and slowly swivelled and blown by swivel blades 2. On the other hand, secondary air is blown from an annular diffuser 3. Therfore, the coal and the primary and secondary airs are not abruptly mixed, and the flame is divided into primary and secondary flames 8 and 9 to take place combustion at relatively low temperature so as to reduce the production of NOX. In this case in order to prevent the fly of the flame, air is blown from an annular nozzle 7. When exclusively burning oil, oil is injected from a nozzle 5, and combustion air is injected from the nozzle 7 to stabilize the combustion. Since the two stage combustion air is blown from the diffuser 3, the oil is burnt at two stages to reduce the production of NOX.

Hot air heater

Abstract: PURPOSE:To prevent the hot air diffusing port from rising to an abnormally high temperature while heightening the humidifying efficiency by means of a water channel formed as a circulation passage in the section with a humidifying tray, a water tank and a pump. CONSTITUTION:The outer frame 3 of the hot air diffuser 2 forms a hollow water channel while the louvre of the hot air diffuser forms a water channel communicated to the outer frame 3. The louvre 4 and the outer frame are combined with a humidifying tray 5, a water tank 6 and a pump 7 to make a circulation passage. In such an arrangement, the pump 7 is energized during the hot air heating, which allows water in the water tank 6 to flow to the humidifying tray 5 through the pump 7, the outer frame 3 and the louvre 4 and then return to the water tank 6 after cooling the hot air diffuser section 2.

Clarification tank for excretion

Abstract: PURPOSE:To keep the treating performance of activated carbon treatment apparatus constant as well as promote the generation and growth of activated sludge is aeration chamber by introducing polluted water deprived of coloring matters and SS from the activated treatment apparatus, together with saturated activated carbon, into the aeration chamber. CONSTITUTION:The polluted water 12 is introduced into the separation chamber 9 tp separate it into liquid and solids, and then the liquid is sucked in the lower end of the vertical pipe 13 and flowed into the activated carbon treatment apparatus 1 through the inflow pipe 15. the polluted water treated in the apparatus 1 is flowed down, along with saturated activated carbon, to the aeration chamber 2 below the apparatus 1 for aeration with air from the diffuser 16, during which saturated activated carbon becomes the uncleus of activated sludge during aeration from the diffuser 16, whereby promoting the generation and growth of activated sludge. Furthermore, the activated sludge nucleus becomes so great specifically that its separability by sedimentation is raised. Then, aerated liquid introduced into the sedimentation chamber 8 is subjected to sedimentation and separation, sterilized in the sterilizing chamber 17, and then released from the discharge pipe 18.