WO1991016125A1 - Dispositif d'aeration de liquides - Google Patents

Dispositif d'aeration de liquides Download PDF

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Publication number
WO1991016125A1
WO1991016125A1 PCT/EP1991/000740 EP9100740W WO9116125A1 WO 1991016125 A1 WO1991016125 A1 WO 1991016125A1 EP 9100740 W EP9100740 W EP 9100740W WO 9116125 A1 WO9116125 A1 WO 9116125A1
Authority
WO
WIPO (PCT)
Prior art keywords
bladder
gas
indicates
gas supply
outlet openings
Prior art date
Application number
PCT/EP1991/000740
Other languages
German (de)
English (en)
Inventor
Karl Heinz SCHÜSSLER
Original Assignee
Schuessler Karl Heinz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schuessler Karl Heinz filed Critical Schuessler Karl Heinz
Publication of WO1991016125A1 publication Critical patent/WO1991016125A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23124—Diffusers consisting of flexible porous or perforated material, e.g. fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids by bubbling
    • B01F23/23105—Arrangement or manipulation of the gas bubbling devices
    • B01F23/2312—Diffusers
    • B01F23/23124—Diffusers consisting of flexible porous or perforated material, e.g. fabric
    • B01F23/231244—Dissolving, hollow fiber membranes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a device for gassing liquids, in particular for aerating waste water, by means of a gas distributor to be arranged under the liquid level and connectable to a gas supply device, which has at least one membrane-like wall made of flexible material with a plurality of gas outlet openings.
  • Such a device for fine-bubble aeration of waste water is known from DE-OS 2 261 994.
  • An air hose consisting of elastic material, connected at one end to an air supply line and closed at the other end with an unperforated underside and with a plurality of air outlet openings is provided, the air hose being held at its longitudinal edges by a support member and in a membrane under the tension of an air cushion is arranged on the air hose, which membrane forms the air channel connected to the air supply line and delimits it.
  • the two hose Walls are connected to each other at the two longitudinal edges by a weld seam and each form a loop which encloses one of the two strand-shaped support members.
  • the membrane which is under the tension of an air cushion, is also welded to the two tube walls on its two side edges.
  • the air hose is also supported on its two side edges by a sheet steel profile which covers the weld seams and is intended to prevent their peeling.
  • the sheet steel profile is intended to increase the rigidity and weight of the air hose; it can also be provided on the underside of the air hose, the weight expediently being somewhat larger than the buoyancy of the hose filled with air.
  • This known ventilation device is structurally complex and therefore expensive.
  • a special support structure for the membrane is also considered necessary according to the proposal of DE-PS 34 10 267.
  • a basic body provided, which has at least one inlet for the gas.
  • the membrane covers the base body and is attached to it.
  • a device for limiting the stroke of the membrane is also attached to the base body.
  • the inlet for the gas is passed through the base body as a passage opening.
  • the limiting device consists of a connection which is attached to the membrane at one end in the area of overlap of the passage opening and which cooperates at its other end with a counterpart arranged in the area of the passage opening.
  • many parts to be assembled with one another are required, which make the gassing device more expensive in terms of time and material expenditure.
  • this object is essentially achieved in that the wall is designed as a support-free bubble which is held only by at least one gas supply nozzle and is closed except for at least one gas supply opening and the gas outlet openings.
  • the solution according to the invention therefore does not require any internal or external supporting structure.
  • the gas distributor only needs to consist of the bladder itself.
  • the bladder can be kept dimensionally stable even with a small amount of gas.
  • the gas outlet openings are essentially over the entire Surface of the bladder, preferably evenly, distributed to ensure a uniform gas supply in the liquid.
  • the bubble preferably assumes a predetermined shape under gas pressure, preferably essentially the shape of a sphere, a flattened sphere or a horizontally lying ring, as a result of which an even gas distribution in the liquid can be achieved.
  • a predetermined shape under gas pressure preferably essentially the shape of a sphere, a flattened sphere or a horizontally lying ring, as a result of which an even gas distribution in the liquid can be achieved.
  • the ring lying horizontally it is particularly advantageous that when the gas is acted upon, a downward flow of the liquid is achieved in the center of the ring, which effects a good gas exchange or a good gas enrichment.
  • the effective opening cross section of the gas outlet openings is different in size in adaptation to the liquid pressure to be overcome by the gas emerging through the gas outlet openings.
  • the opening cross section of the gas outlet openings in the bubble wall decreases from bottom to top to the extent that the liquid pressure decreases from bottom to top depending on the vertical height of the bubble.
  • a uniform gas outlet can also be promoted in that the bubble wall has different thicknesses in adaptation to the liquid pressure to be overcome by the gas escaping through the gas outlet openings.
  • the bladder wall in the lower area of the bladder has a smaller thickness than in the upper area, so that the gas passage through the gas outlet openings in the lower area of the bladder is opposed to a lower flow resistance than in the upper bladder area, so that the whole of it ⁇ escaping gas pressure to be overcome is approximately the same.
  • the bladder wall can consist of a stretchable, for example rubber-elastic material which assumes the desired shape and size under the pressurization required for the gassing.
  • the bladder wall may consist of a non-stretchable, for example textile material.
  • the size and shape of the bladder pressure is fixed independently of the pressure above a minimum pressure of the gas.
  • the textile material allows a certain stretch, i.e. to combine the properties of a stretchable material with those of a non-stretch material.
  • This can be achieved in particular in that the bladder wall consists of textile material or has a textile reinforcement insert or overlay.
  • the gas outlet openings are made of stretchable material in the prestressed bladder wall.
  • the gas outlet openings are closed without pressurization, while they only open when a minimum pressure of the gas is applied.
  • the opening cross section of the gas outlet openings is pressure-dependent and can be adjusted accordingly. If a pressure-independent opening cross section of the gas outlet openings is desired, these are preferably introduced into the non-prestressed bladder wall. You then have before and during the gas application regardless of the pressure in essentially the same opening cross-section.
  • gas outlet openings block one from the inside out, i.e. have a radially increasing opening cross-section, i.e. are conical. This has the advantage that when the gas exits the bladder, any dirt deposits are easily entrained from the gas outlet openings, thereby reducing the risk of blockages even of relatively small gas outlet openings.
  • gas outlet openings are introduced, for example, in the form of perforations from the outside into the bladder wall by needle pricks.
  • a particularly simple assembly is possible if the bladder with its gas supply nozzle is placed on a pipe socket of the gas supply device. Such a bladder can also be easily replaced if it is defective.
  • the gas supply connection can be fastened to the pipe connection by means of a clamp, so that even larger pressurizations can be handled.
  • the bladder has a gas supply nozzle with a bead which can be snapped into a gas supply opening of the gas supply device. This also allows a relatively easy assembly and disassembly of the bladder.
  • the gas supply nozzle with the bead can be formed in one piece with the bubble, which is also in one piece.
  • the bladder may consist of several parts, that is to say a plurality of wall sections which are vulcanized together, welded together and / or glued to one another, sewn together and / or by means of e.g. of an annular shaping element, zipper or the like are connected to one another.
  • the invention proposes that the bladder surrounds a ballast weight at a distance.
  • the ballast weight can be formed as a hollow body made of rigid or flexible material, the interior of which is in flow connection with the liquid surrounding the bladder and / or can be filled with a liquid such as water, concrete, lead or the like as a ballast weight.
  • the ballast weight can also be arranged outside the bladder.
  • a e.g. Check valve designed as a flap or ball valve, which prevents the liquid from penetrating into the pipe socket or the pipe system of the gas supply device when the pressure drops.
  • FIG. 1 shows a gassing device having the invention according to a first embodiment of the invention schematically in section
  • the device for gassing liquids shown in FIG. 1 consists of a gas distributor designed as a bladder 4, which is arranged below the liquid level and can be connected to a gas supply device 7.
  • the gas supply device 7 has a pipeline 15, from which one or more pipe sockets 6 branch off at a gas supply opening 9.
  • the bladder 4 has a diaphragm-like bladder wall 5 made of flexible material with a large number of gas outlet openings 1, which are distributed substantially uniformly over the entire membrane surface (only a section is shown).
  • the bladder 4 is, at least in the pressurized state, spherical and support-free only by way of its gas supply connection 2, which is placed over the pipe connection 6 and fixed by means of a clamp 12.
  • the pipe connection 6 is located in front of the gas supply opening 3 in the bubble wall 5, a check valve 14 designed as a ball valve, which opens when the gas pressure is applied and closes when the pressure drops, so that no liquid can get into the bubble 4 and the gas supply device 7 via the gas outlet openings 1.
  • the embodiment according to FIG. 2 differs from that shown in FIG. 1 essentially in that the gas supply connection 2 adjoining the gas supply opening 3 of the bladder wall 5 is designed as a bulge 8 which can be buttoned into the gas supply opening 9 of the pipeline 15.
  • the embodiment according to FIG. 3 differs from that shown in FIG. 2 essentially in that the bladder 4 is not manufactured in one piece, but consists of an upper and a lower half of the bladder, which are connected to one another via their ring flanges 13 facing each other are connected.
  • the connection can consist of vulcanizing, welding, gluing, sewing together or the like.
  • FIG. 4 has a bladder 4, which according to FIG. 3 consists of an upper half and a lower half.
  • the bladder wall 5 surrounds at a distance a ballast weight 11 which is designed as a hollow body, the interior of which is brought into flow connection with the liquid surrounding the bladder 4 or can be filled with a separate liquid, such as water, concrete, lead or the like.
  • the ballast weight 11 has been filled with a separate liquid via an angled filler neck 16 which is closed with a cap 17 made of plastic. If such ballast weights 11 are present, the gas distributor or the gas supply device 7 does not need to be attached to the bottom of the basin containing the liquid to be gassed.
  • the bladder 4 is ring-shaped and is fastened to the pipeline 15 in the region of two diametrically opposite gas supply openings 3 by means of the gas supply nozzle 2 designed as a bead 8 that can be buttoned into the gas supply openings 9.
  • the bladder 4 is also annular. However, its interior is in flow connection via a single branching gas supply connection 2, which is at its lower end lo
  • annular bladder 4 there is a second annular bladder as ballast weight 11, which has been filled with water via the filler neck 16.
  • the bladder 4 consists of two bladder halves which are held together gas-tight on their mutually facing edges by means of an annular shaping element 10.
  • a gas supply connection 2 designed as a bead 8 is connected, which is buttoned into the gas supply opening 9 with its lower end.
  • the bladder 4 is shown in a state in which it has not yet been fully inflated. When inflated, the shaping element 10 gradually rises from its lowest position in the direction of the arrow.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

Un dispositif d'aération de liquides, notamment d'aération d'eaux usées, au moyen d'un distributeur de gaz (7) agencé sous le niveau du liquide et raccordable à un dispositif d'amenée de gaz, comprend au moins une paroi membranaire (4) en un matériau flexible pourvue d'une pluralité d'orifices de sortie du gaz. Ce dispositif d'aération se caractérise par le fait que la paroi est formée par une vessie non soutenue fermée, sauf à l'endroit d'au moins un orifice d'amenée du gaz et des orifices de sortie du gaz, maintenue uniquement par l'intermédiaire d'une tubulure (2) d'amenée du gaz.
PCT/EP1991/000740 1990-04-20 1991-04-18 Dispositif d'aeration de liquides WO1991016125A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4012631.5 1990-04-20
DE19904012631 DE4012631A1 (de) 1990-04-20 1990-04-20 Vorrichtung zum begasen von fluessigkeiten

Publications (1)

Publication Number Publication Date
WO1991016125A1 true WO1991016125A1 (fr) 1991-10-31

Family

ID=6404746

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000740 WO1991016125A1 (fr) 1990-04-20 1991-04-18 Dispositif d'aeration de liquides

Country Status (3)

Country Link
AU (1) AU7745091A (fr)
DE (2) DE4012631A1 (fr)
WO (1) WO1991016125A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315733C2 (de) * 1993-05-11 2000-03-16 Linde Ag Perforierter Begasungsschlauch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9109713D0 (en) * 1991-05-03 1991-06-26 Todd John J Apparatus for the gasification of liquids
ES2085841T3 (es) 1994-09-29 1999-01-16 Schussler Karl Heinz Dispositivo de gasificacion.
DE29810677U1 (de) 1998-06-13 1998-10-08 Roediger Anlagenbau-GmbH, 63450 Hanau Flächenbelüfter
DE19952518A1 (de) * 1999-10-30 2001-05-17 Alfons Grooterhorst Vorrichtung zur kleinräumigen Zugabe und Entfernung von Gasen und Flüssigkeiten in technischen und natürlichen Systemen
DE20218719U1 (de) * 2002-12-02 2003-02-27 Gummi Jaeger Gmbh Vorrichtung zum Belüften von Wasser

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA949239A (en) * 1971-07-06 1974-06-11 Svetislav Bogdanovic-Baron Fluid aerating means
US3997634A (en) * 1973-10-09 1976-12-14 Downs Ernest W Diffuser assembly
DE8714502U1 (de) * 1987-10-31 1988-01-14 Felder Industrietechnik GmbH, 8501 Rückersdorf Vorrichtung zur feinblasigen Belüftung von Abwasser in biologischen Kläranlagen
DE3731998A1 (de) * 1987-09-23 1989-04-06 Jaeger Arnold Vorrichtung zur wasserbelueftung
DE3834317C1 (en) * 1988-10-08 1990-01-25 Envicon Luft- Und Wassertechnik Gmbh & Co Kg, 4220 Dinslaken, De Apparatus for introducing gas into a liquid
JPH0231825A (ja) * 1988-07-20 1990-02-01 Kanai Hiroyuki 気泡発生器
DE3921936A1 (de) * 1989-07-04 1991-01-17 Arnold Jaeger Vorrichtung zum belueften von wasser

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5927896U (ja) * 1982-08-13 1984-02-21 日本碍子株式会社 散気装置
DE8706219U1 (de) * 1987-04-30 1988-09-01 Tiefel, Johann, 86316 Friedberg Belüfter zum Anreichern einer Flüssigkeit mit Gas
CH493263A (de) * 2012-02-09 1970-07-15 Stenberg Flygt Ab Verfahren zur Belüftung einer Flüssigkeit sowie Vorrichtung zur Ausübung des Verfahrens

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA949239A (en) * 1971-07-06 1974-06-11 Svetislav Bogdanovic-Baron Fluid aerating means
US3997634A (en) * 1973-10-09 1976-12-14 Downs Ernest W Diffuser assembly
DE3731998A1 (de) * 1987-09-23 1989-04-06 Jaeger Arnold Vorrichtung zur wasserbelueftung
DE8714502U1 (de) * 1987-10-31 1988-01-14 Felder Industrietechnik GmbH, 8501 Rückersdorf Vorrichtung zur feinblasigen Belüftung von Abwasser in biologischen Kläranlagen
JPH0231825A (ja) * 1988-07-20 1990-02-01 Kanai Hiroyuki 気泡発生器
DE3834317C1 (en) * 1988-10-08 1990-01-25 Envicon Luft- Und Wassertechnik Gmbh & Co Kg, 4220 Dinslaken, De Apparatus for introducing gas into a liquid
DE3921936A1 (de) * 1989-07-04 1991-01-17 Arnold Jaeger Vorrichtung zum belueften von wasser

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 14, Nr 184 (C709)(4127), 13. April 1990; & JP,A,2,031 825 (HIROYAKI) 1. Februar 1990 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4315733C2 (de) * 1993-05-11 2000-03-16 Linde Ag Perforierter Begasungsschlauch

Also Published As

Publication number Publication date
AU7745091A (en) 1991-11-11
DE4012631A1 (de) 1991-10-24
DE9114013U1 (de) 1992-01-30

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