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WO2005077840A1 - Appareil d'aeration mecanique destine au traitement des eaux usees - Google Patents

Appareil d'aeration mecanique destine au traitement des eaux usees Download PDF

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Publication number
WO2005077840A1
WO2005077840A1 PCT/CZ2005/000017 CZ2005000017W WO2005077840A1 WO 2005077840 A1 WO2005077840 A1 WO 2005077840A1 CZ 2005000017 W CZ2005000017 W CZ 2005000017W WO 2005077840 A1 WO2005077840 A1 WO 2005077840A1
Authority
WO
WIPO (PCT)
Prior art keywords
centre shaft
free end
wing
wings
fastened
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.)
Ceased
Application number
PCT/CZ2005/000017
Other languages
English (en)
Inventor
Zdenek Sosna
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.)
Sbh Water Spol S Ro
Original Assignee
Sbh Water Spol S Ro
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 Sbh Water Spol S Ro filed Critical Sbh Water Spol S Ro
Publication of WO2005077840A1 publication Critical patent/WO2005077840A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • C02F3/205—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
    • C02F3/207—Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors with axial thrust propellers
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2331—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
    • 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
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2336—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer
    • B01F23/23366—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements characterised by the location of the place of introduction of the gas relative to the stirrer the gas being introduced in front of the stirrer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/113—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller
    • 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 concerns a mechanical aeration gear for treatment of sewage producing fine air bubbles.
  • the mechanical aeration gear for treatment of sewage is dealt in the CZ Pat. 276137 called Deep chamber aerator.
  • the gear consists of a centric cylindrical tube which are three sides connected to. The sides are arched or fully cylindrically bent against the rotation direction.
  • the centric cylindrical tube is connected to a shaft which is joined through Hooke ' s universal joint to a driving motor. There is made a float space in the upper part of the cylindrical tube. This alleviates the gear, the most part of which is placed under water surface in an aeration tank containing the sewage determined for treatment. There are vertical flat hindrances in the aeration tank and they prevent the liquid rotation in the tank.
  • a mechanical aeration gear for treatment of sewage made of a hollow centre shaft to which are fastened wings in the shape of a half of a cylindrical surface.
  • the invention centre lies in the fact that every of the two wings is fastened on the centre shaft on the opposite side of its diameter. A free end of every wing is at a distance of one half of the centre shaft diameter from its surface.
  • a free end of every wing bears on and is fixed in the corner between a horizontal and vertical part of every supporting rib.
  • the shorter horizontal part of a supporting rib exceeds the outside free end wing surface which is fastened on the opposite part of the centre shaft diameter.
  • a front part of the shorter rib part which exceeds the outside wing surface is pointed.
  • the stirring blades and the horizontal surface form an angle ⁇ which is from 20° to 30°.
  • the stirring blades are in the shape of flat plates.
  • the distance between outside end edges of the stirring blades is bigger than is the biggest distance between outside surfaces of free end parts of both wings.
  • Fig. 1 - shows a gear with a centre shaft, with two arched wings, with two stirring blades a supporting ribs in an axonometric view
  • Fig. 2 - shows the same gear in a front view
  • Fig. 3 - shows a profile the plane of which runs under a flange
  • Fig. 4 - shows stirring blades in a bottom view
  • Fig. 5 - shows one part of the gear with the first stirring blade in a side-view.
  • a centre shaft is a cylindrical tube. On the centre shaft are fastened two bent wings l, 22. Every wing 2 _, 22 has in a cross section the shape of one half of a thin-walled cylindrical tube cut in the plain going through its longitudinal axis. The diameter of both wings 2J_, Z2 is the same and equals to the double of centre shaft diameter.
  • the joining of each wing 2 _, 22 with the centre shaft 1 is made on the opposite parts of its diameter by for example welding along the whole length of the adjacent part of every wing 2 ⁇ _, 22. Thus the inner part of every wing 2 . , 22 gradually recedes from the outside centre shaft 1 surface.
  • a free end of every wing 2.1 , 2.2 is on the opposite diameter part.
  • the distance of the free end of every wing 2.1 , 2.2 from the centre shaft 1 surface equals to one half of the centre shaft diameter.
  • the length of every wing 2 _, 22 in a vertical direction corresponds to approx. Two thirds of the centre shaft 1 height.
  • All supporting ribs 4 are the same. They are in the shape of a capital letter "L”.
  • a free end of a longer vertical supporting rib 4 part is fixed on the shaft 1
  • a free end of every wing 2 ⁇ _, 22 bears on the corner between a horizontal and vertical part of every supporting rib 4 and is fixed there.
  • a shorter horizontal part of a supporting rib 4 exceeds the outside surface of that wing Zl, 22 which is fastened on the opposite diameter part of the centre shaft 1 .
  • a front part of the shorter supporting rib 4 part exceeding the outside wing 2 . , 22 surface is pointed.
  • the number of supporting ribs 4 at every wing 2.1 , 2.2 depends on its length. In this version example (Fig. 1 and Fig. 2) there are 7 supporting ribs 4_. Their number can be according to the wing 2 ⁇ _, 22 length bigger or smaller.
  • the stirring blades 3J., 32 are in the shape of flat plates.
  • the distance between outside end edges of the stirring blades 3J . , 3,2 is bigger than the distance between outside surfaces of the free end parts of both wings Zl, ZZ
  • the most gear part, which has wings Zl, Z2 is dipped into the aeration tank with sewage meant for treatment.
  • the max surface level of sewage is mark by a triangle (Fig. 2).
  • the supporting ribs 4 and both stirring blades 3.1 , 3.2 well influence the air flow mixing during which very fine air bubbles are made. The smaller part of these air bubbles gradually bubble through to the water surface. Most of the fine air bubble flow continue towards the stirring blades 3 . , 32.
  • Stirring blades 3J_, 3.2 rotation contributes to intensive turbulence of the air flow towards the down levels of the aeration tank and to the aeration tank bottom and to the very fine air bubbles creation.
  • stirring blades 3 _, 3 ⁇ 2 put the water and bacteria mixture in the aeration tank into rotation hydraulic movement. By this movement the way of the fine air bubbles to the water surface is prolonged.
  • This space is filled by water.
  • the stirring blades 3 _, 32 put the water and bacteria mixture in the aeration tank to calm rotation movement.
  • the water in the aeration tank is not oxidized, it is only being stirred. Denitrification proceeds in the aeration tank during this process. Nitrides and phosphates are degraded..
  • the invention will be used to aeration and stirring of aeration tanks in biological sewage water treatment plants and to sludge regeneration in tanks and ponds.

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)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

La présente invention concerne un dispositif d'aération mécanique destiné au traitement des eaux usées qui est constitué d'un axe central creux (1) auquel sont fixées des ailettes (2.1, 2.2) se présentant sous forme d'une demi-surface cylindrique. Chacune des ailettes (2.1, 2.2) est fixée sur l'axe central (1) sur le côté opposé de son diamètre. Un bord d'extrémité libre de chaque ailette (2.1, 2.2) se situe à une certaine distance d'une moitié du diamètre de l'axe central (1) depuis sa propre surface. Des lames de brassage (3.1, 3.2) sont attachées sur l'axe central (1) sous les ailettes (2.1, 2.2). Des nervures de support (4) se présentant sous forme d'une lettre capitale 'L'' se situent entre l'extrémité libre de chaque ailette (2.1, 2.2) et l'axe central (1). Une extrémité libre de la partie la plus longue de chaque nervure (4) est fixée sur l'axe central (1). Une extrémité libre de chaque ailette (2.1, 2.2) repose sur le coin situé entre la partie la plus courte et la partie la plus longue de chaque nervure de support (4) et se trouve fixée sur ce même coin. La partie la plus courte de chaque nervure de support (4) dépasse de l'extrémité libre de l'ailette (2.1, 2.2) qui est fixée sur la partie opposée du diamètre de l'axe central (1).
PCT/CZ2005/000017 2004-02-12 2005-02-11 Appareil d'aeration mecanique destine au traitement des eaux usees Ceased WO2005077840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV2004-230 2004-02-12
CZ2004230A CZ295006B6 (cs) 2004-02-12 2004-02-12 Mechanické provzdušňovací zařízení pro čištění odpadních vod

Publications (1)

Publication Number Publication Date
WO2005077840A1 true WO2005077840A1 (fr) 2005-08-25

Family

ID=34529464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2005/000017 Ceased WO2005077840A1 (fr) 2004-02-12 2005-02-11 Appareil d'aeration mecanique destine au traitement des eaux usees

Country Status (2)

Country Link
CZ (1) CZ295006B6 (fr)
WO (1) WO2005077840A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111170462A (zh) * 2020-03-16 2020-05-19 南京大学 交替饥饿微氧厌氧耦合填料污泥侧流原位减量强化工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH608723A5 (en) * 1975-03-05 1979-01-31 Loosli Alfred Aeration propeller
DE3230637A1 (de) * 1982-08-18 1984-02-23 Hubert 5440 Mayen Fuchs Schutzvorrichtung
US5993158A (en) * 1997-10-17 1999-11-30 Dbs Manufacturing, Inc. Method and apparatus for aeration using flexible blade impeller
EP1151786A1 (fr) * 1999-01-14 2001-11-07 Kenichi Imako Dispositif melangeur de gaz/liquide

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH608723A5 (en) * 1975-03-05 1979-01-31 Loosli Alfred Aeration propeller
DE3230637A1 (de) * 1982-08-18 1984-02-23 Hubert 5440 Mayen Fuchs Schutzvorrichtung
US5993158A (en) * 1997-10-17 1999-11-30 Dbs Manufacturing, Inc. Method and apparatus for aeration using flexible blade impeller
EP1151786A1 (fr) * 1999-01-14 2001-11-07 Kenichi Imako Dispositif melangeur de gaz/liquide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111170462A (zh) * 2020-03-16 2020-05-19 南京大学 交替饥饿微氧厌氧耦合填料污泥侧流原位减量强化工艺

Also Published As

Publication number Publication date
CZ2004230A3 (cs) 2005-05-18
CZ295006B6 (cs) 2005-05-18

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