EP0734288B1 - Begasungseinrichtung - Google Patents

Begasungseinrichtung Download PDF

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Publication number
EP0734288B1
EP0734288B1 EP95902062A EP95902062A EP0734288B1 EP 0734288 B1 EP0734288 B1 EP 0734288B1 EP 95902062 A EP95902062 A EP 95902062A EP 95902062 A EP95902062 A EP 95902062A EP 0734288 B1 EP0734288 B1 EP 0734288B1
Authority
EP
European Patent Office
Prior art keywords
gas supply
gas
supply distributor
gasifying device
central body
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP95902062A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0734288A1 (de
Inventor
Wilfried Ott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ott Rita
Original Assignee
Ott Rita
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
Priority claimed from DE4342376A external-priority patent/DE4342376C2/de
Application filed by Ott Rita filed Critical Ott Rita
Publication of EP0734288A1 publication Critical patent/EP0734288A1/de
Application granted granted Critical
Publication of EP0734288B1 publication Critical patent/EP0734288B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B01F23/2311—Mounting the bubbling devices or the diffusers
    • 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
    • B01F23/2311—Mounting the bubbling devices or the diffusers
    • B01F23/23114—Mounting the bubbling devices or the diffusers characterised by the way in which the different elements of the bubbling installation are mounted
    • B01F23/231143—Mounting the bubbling elements or diffusors, e.g. on conduits, using connecting elements; Connections therefor
    • 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
    • B01F23/23126—Diffusers characterised by the shape of the diffuser element
    • B01F23/231265—Diffusers characterised by the shape of the diffuser element being tubes, tubular elements, cylindrical elements or set of tubes

Definitions

  • the invention relates to a gassing device according to the preamble of claim 1.
  • Fumigation devices of this type are preferably used to introduce air into the wastewater in the treatment of wastewater in order to enable aerobic degradation processes of the wastewater present in the wastewater. Since the gas is always lighter than the liquid, it must be introduced into the liquid from the bottom of the container or basin. The introduction must be as extensive as possible so that the gas bubbles do not pass undissolved through the liquid and emerge on the surface. In this case the required saturation of the liquid would not be achievable.
  • a gassing device known from EP 0 345 207 B1 comprises one or more gas supply distributors, from which a plurality of inlet bodies branch off to the side in order to distribute the gas to be introduced over a large area.
  • inlet bodies were screwed to the gas supply distributor by means of fastening sockets. Separate introductory bodies are therefore required for each side. Because of the large number of introductory bodies to be screwed together, assembly is complex.
  • a fumigation device is known from DE 36 36 882 C1, in which in each case one-piece introduction bodies with carrier bodies extending from a central body are fastened to a gas supply distributor. Fastening is carried out by means of clamping elements which jointly encompass the central body and lateral recesses on the gas supply distributor.
  • Each carrier body is surrounded by a perforated tubular membrane which is attached to the carrier body by means of hose clips at both ends of the membrane.
  • the inner hose clamps simultaneously form the tensioning elements for fastening the central body to the receiving troughs of the gas supply distributor.
  • the central body is fluidly connected to the gas supply distributor via a bore and is closed to the outside by cap-shaped inserts approximately in the middle of the carrier body. Gas through openings lead from the interior lying between the cap-shaped inserts into the areas of the membrane.
  • the invention has for its object to provide a gassing device of the type described in the preamble of claim 1, which over the length of the membrane even gas entry into the liquid to be gassed with little buoyancy of the inlet body and thereby enables a simple overall assembly of the gassing device and a less heavily loaded and therefore more secure attachment of the inlet body to the gas supply distributor.
  • the embodiment according to the invention achieves uniform gas entry over the length of the membrane through the gas passage openings designed as longitudinally groove-shaped gas supply channels.
  • the arrangement of a central channel and two branch channels extending from it limits the gas volume in the inlet body and thereby reduces the buoyancy.
  • the wall thickness of the carrier body decreases from the central body to the free ends. Since the bending moment load on the carrier bodies due to mechanical movements of the liquid, caused by agitators, decreases with increasing distance from the gas supply distributor, this measure saves material without risking damage to the carrier bodies.
  • the carrier bodies preferably have outlet openings in the region of the central body, which are arranged in the upper region in the operating position. Through these outlet openings, liquid coming from the free open ends can flow through the interior of the carrier bodies and exit again. The otherwise possible deposit of anoxic sludge in the interior and the associated formation of toxins is excluded.
  • the introduction body is expediently fastened to the gas supply distributor by means of a screw which axially extends through the central channel and carries a lock nut which braces the wall of the gas supply distributor against the flange area of the central body.
  • the lock nut is designed as a narrow web, the width of which is smaller and the length of which is greater than the bore in the gas supply distributor. This type of fastening enables quick and easy installation of the inlet body on the gas supply distributor, since the lock nut is automatically fixed.
  • the lock nut carries a centering collar which engages in the bore of the gas supply distributor.
  • This centering collar can be conical. Through the centering collar, the inlet body is aligned during assembly via the screw so that the central channel in the central body is exactly aligned with the bore in the gas supply distributor to form the flow connection.
  • a particularly twist-proof attachment can be achieved if the lock nut carries claws that penetrate into the material of the gas supply distributor when tightened.
  • a seal preferably in the form of an O-ring, and between the head of the screw can be placed between the gas supply distributor and the flange of the central body and a sealing washer can be arranged on the surface of the inlet body.
  • the flange formed on the central body can carry lateral centering. This allows the central body to be correctly positioned when it is put on.
  • a nose with two axial slots on the inlet body can at the same time form an anti-rotation device for the counter nut by accommodating the counter nut in the slots.
  • the nose is preferably beveled. This makes assembly easier when the introduction body is slanted onto the gas supply distributor for the purpose of inserting the lock nut placed on the screw into the bore of the gas supply distributor.
  • the gassing device shown in Fig. 1 comprises a gas supply manifold 10 on which an introduction body 12 is attached.
  • the inlet body 12 in turn comprises a central body 24 with two lateral support bodies 46 and 48.
  • the inlet body 12 is clamped to the gas supply distributor 10 by means of a flange which is formed in the region of the central body 24 and which supports lateral centerings 42.
  • the bracing is carried out by means of a screw 30 and a lock nut 32 which have a bore 34 in the gas supply distributor 10 overlaps.
  • the gas is supplied from the hollow gas supply distributor 10 via a bore 34 in the gas supply distributor 10, via a central duct 26 in the central body 24 to branch ducts 28, which are likewise arranged in the central body 24.
  • the branch channels 28 open into longitudinal groove-shaped gas supply channels 16 of the carrier bodies 46 and 48.
  • the carrier bodies 46 and 48 are surrounded by perforated membranes 14 which completely cover the gas supply channels 16 and are fastened axially next to the gas supply channels 16 by means of clips 40.
  • the lock nut 32 is designed as a flat web, the width of which is narrower but the length of which is greater than the diameter of the central channel 26 and the bore 34.
  • the lock nut 32 enables fastening on the one hand by means of the tabs projecting in the longitudinal direction, but gaps remain on the side of the narrow web, through which gas can pass into the central channel.
  • a seal in the form of an O-ring 38 is arranged in the area of the flange formed on the central body 24 and the head of the screw 30 by means of a sealing washer 36 sealed against the surface of the inlet body 12.
  • a centering collar 44 creates on the lock nut 32 a centering of this lock nut 32 with respect to the bore 34 in the gas supply distributor 10.
  • the centering collar 44 can be conical, so that at the same time an anti-rotation is achieved when the lock nut 32 penetrates axially into the bore 34 and wedges there.
  • the protruding tabs of the lock nut could also be designed as claws that penetrate into the surface of the gas supply distributor 10.
  • the interior 18 of the carrier bodies 46 and 48 of the inlet body 12 communicates with the waste water at the free ends 20.
  • the wastewater can therefore penetrate this area.
  • the inlet body 12 has outlet openings 22 which are located at the top in the operating position. Waste water coming from the free ends can flow through the interior openings 18 through these outlet openings and through the outlet openings 22 exit again.
  • the flow is caused by the fact that, due to the gases emerging from the perforated membranes, an upward movement of the waste water is caused, which also includes the surrounding areas and entrains the waste water in the interior 18 via the outlet openings 22.
  • the outlet openings 22 thus have the effect that the interior spaces 18 are also flowed through and the formation of anoxic sludge is thereby effectively prevented.
  • FIG. 3 shows a cross section through the introduction body 12 along the section line CD from FIG. 1.
  • the procedure is such that holes are first made in the gas supply distributor and then the inlet body 12 with the lock nut 32 screwed onto the outer end of the screw 30 are placed obliquely on the gas supply distributor 10 so that the lock nut 32 inclined can penetrate into the bore 34.
  • the screw 30 is now raised so that the counter nut 32 penetrates with its centering collar 44 into the bore 34 and is jammed there.
  • the screw 30 is then tightened.
  • the lock nut 32 remaining in the bore 34 can be reused, since it remains jammed in the bore 34 even after the screw 30 has been loosened.
  • Fig. 4 shows another alternative of the longitudinal sectional drawing shown in Fig. 1.
  • the central body 24 is provided with a centering ring which engages in the bore 34 and an additional centering causes.
  • the lock nut 32 has L-shaped angled ends which abut the surface of the gas supply distributor.
  • FIG. 5 instead of a gas supply distributor 10 with a rectangular cross section, there is one with a circular cross section.
  • FIG. 6 shows an advantageous embodiment of the invention with a gas supply distributor 10 in cross-section, onto which an introduction body 12 with a nose 50 is placed
  • FIG. 7 shows an introduction body 12 with a nose 50 fastened on a gas supply distributor 10.
  • the nose 50 is chamfered to facilitate the insertion of the introduction body 12 prepared with screw 30 and lock nut 32. Due to the inclination of the inlet body 12 in relation to the gas supply distributor 10 when the nose 50 with the lock nut 32 is inserted into the bore 34, the lock nut 32 passes through the bore 34 despite the larger diameter compared to the bore 34 and can then be aligned when the inlet body 12 is subsequently aligned overlap the bore 34 to the gas supply distributor 10. By chamfering the nose 50 it is achieved that the nose 50 can penetrate into the bore 34 even in the inclined state of the inlet body 12.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Accessories For Mixers (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP95902062A 1993-12-13 1994-12-10 Begasungseinrichtung Expired - Lifetime EP0734288B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4342376 1993-12-13
DE4342376A DE4342376C2 (de) 1993-12-13 1993-12-13 Begasungseinrichtung
DE4435600 1994-10-05
DE4435600 1994-10-05
PCT/DE1994/001466 WO1995016514A1 (de) 1993-12-13 1994-12-10 Begasungseinrichtung

Publications (2)

Publication Number Publication Date
EP0734288A1 EP0734288A1 (de) 1996-10-02
EP0734288B1 true EP0734288B1 (de) 1997-08-13

Family

ID=25932008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95902062A Expired - Lifetime EP0734288B1 (de) 1993-12-13 1994-12-10 Begasungseinrichtung

Country Status (10)

Country Link
US (1) US5676890A (ja)
EP (1) EP0734288B1 (ja)
JP (1) JP3634369B2 (ja)
CN (1) CN1063676C (ja)
AU (1) AU684325B2 (ja)
DE (1) DE59403754D1 (ja)
ES (1) ES2107903T3 (ja)
GR (1) GR3025353T3 (ja)
RU (1) RU2132722C1 (ja)
WO (1) WO1995016514A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010015813U1 (de) 2010-11-24 2011-02-10 Rehau Ag + Co Vorrichtung zur lösbaren fluiddichten Verbindung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645781C1 (de) * 1996-11-07 1998-05-28 Ott Rita Befestigungsvorrichtung für eine Begasungseinrichtung
US6497402B2 (en) * 2001-03-30 2002-12-24 Environmental Dynamics, Inc. Diffuser mounting system for aeration of liquids
DE102004036634B4 (de) * 2004-07-05 2006-04-20 Invent Umwelt-Und Verfahrenstechnik Ag Vorrichtung zum Begasen von Flüssigkeiten und Verfahren zur Montage der Vorrichtung
US7311299B2 (en) * 2004-10-26 2007-12-25 Daicen Membrane-Systems, Ltd. Aeration device and aeration system
JP2007014899A (ja) * 2005-07-08 2007-01-25 Daicen Membrane Systems Ltd 散気装置
JP2007289891A (ja) * 2006-04-26 2007-11-08 Sumitomo Heavy Industries Environment Co Ltd 排水処理装置及び排水処理方法
US8657268B2 (en) * 2007-02-28 2014-02-25 Gregory P. Smiltneek Methods and apparatus for wastewater treatment
JP4781302B2 (ja) * 2007-03-14 2011-09-28 ダイセン・メンブレン・システムズ株式会社 散気方法及び水処理運転方法
SE536982C2 (sv) * 2013-03-18 2014-11-25 Xylem Ip Man S R L Luftarsammansättning för spridning av en gas i en vätska
US9498756B2 (en) * 2014-12-24 2016-11-22 Thomas E. Frankel Assembly for wastewater treatment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3317917A1 (de) * 1983-05-17 1984-11-22 Reinhart von Dr.-Ing. 8011 Solalinden Nordenskjöld Belueftungskoerper fuer abwasserreinigungsanlagen
DE3418548A1 (de) * 1984-05-18 1985-11-21 Norbert 5657 Haan Schneider Begasungseinrichtung
DE3514028A1 (de) * 1985-04-18 1986-10-23 Arnold 3167 Burgdorf Jäger Wasserbelueftungsrohr
DE3624580A1 (de) * 1986-07-21 1988-02-04 Menzel Klaeranlagenbau Gmbh Feinblasiger, wasserdurchstroembarer kunststoffbeluefter
DE3636882C1 (de) * 1986-10-30 1988-05-19 Schreiber Berthold Vorrichtung zur feinblasigen Einleitung eines Gases in eine Fluessigkeit
DE3819305A1 (de) * 1988-06-03 1989-12-07 Ott Rita Begasungseinrichtung
DE4033384A1 (de) * 1990-10-20 1992-04-23 Herle Alexander Peter Begasungseinrichtung zum eintragen von luft oder anderen gasen in eine fluessigkeit
DE4038504C2 (de) * 1990-10-24 2000-03-30 Schreiber Berthold Vorrichtung zur Injektion von Druckluft in eine Flüssigkeit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010015813U1 (de) 2010-11-24 2011-02-10 Rehau Ag + Co Vorrichtung zur lösbaren fluiddichten Verbindung

Also Published As

Publication number Publication date
EP0734288A1 (de) 1996-10-02
WO1995016514A1 (de) 1995-06-22
DE59403754D1 (de) 1997-09-18
CN1063676C (zh) 2001-03-28
RU2132722C1 (ru) 1999-07-10
CN1136284A (zh) 1996-11-20
ES2107903T3 (es) 1997-12-01
US5676890A (en) 1997-10-14
AU1105995A (en) 1995-07-03
JP3634369B2 (ja) 2005-03-30
JPH09508849A (ja) 1997-09-09
GR3025353T3 (en) 1998-02-27
AU684325B2 (en) 1997-12-11

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