GB1441502A - Low speed mechanical aerator impeller - Google Patents

Low speed mechanical aerator impeller

Info

Publication number
GB1441502A
GB1441502A GB3802874A GB3802874A GB1441502A GB 1441502 A GB1441502 A GB 1441502A GB 3802874 A GB3802874 A GB 3802874A GB 3802874 A GB3802874 A GB 3802874A GB 1441502 A GB1441502 A GB 1441502A
Authority
GB
United Kingdom
Prior art keywords
edge
aerator
impeller
outlet
low speed
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
Application number
GB3802874A
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.)
Siemens Water Technologies Holding Corp
Original Assignee
Envirex Inc
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 Envirex Inc filed Critical Envirex Inc
Publication of GB1441502A publication Critical patent/GB1441502A/en
Expired 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
    • C02F3/14—Activated sludge processes using surface aeration
    • C02F3/16—Activated sludge processes using surface aeration the aerator having a vertical axis
    • 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
    • B01F23/234—Surface aerating
    • B01F23/2342—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force
    • B01F23/23421—Surface aerating with stirrers near to the liquid surface, e.g. partially immersed, for spraying the liquid in the gas or for sucking gas into the liquid, e.g. using stirrers rotating around a horizontal axis or using centrifugal force the stirrers rotating about a vertical axis
    • B01F23/234211—Stirrers thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/181—Axial flow rotors
    • F04D29/183—Semi axial flow rotors
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

1441502 Aerating liquids ENVIREX INC 30 Aug 1974 [26 Sept 1973] 38028/74 Heading B1C A rotatable surface aerator has an inverted conical or frusto-conical body 22 having a radius and depth to apex of R with three, four or five blades 23. Each blade lies in a plane inclined at 30‹ to the impeller axis at the upper end of the impeller, and has a leading edge 25, and inlet edge 26a, b, and an outlet edge 27; the outlet edge extends from the upper outer edge of the body member and has a length of between R and 1.5R and the inner portion 26a of the inlet edge is 0.3R below the lower end of the body member. The blades may have inner and outer extensions (31, 32 Fig. 6, not shown). In operation the aerator is disposed at a fixed level in a tank having an outlet weir of such a length that at predetermined maximum and minimum flow rates it maintains the liquid level between the top of the aerator and 0.5R below, and at normal flow rates 0.25-0.2R below the top.
GB3802874A 1973-09-26 1974-08-30 Low speed mechanical aerator impeller Expired GB1441502A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40110073 US3904714A (en) 1973-09-26 1973-09-26 Low-speed mechanical aerator impeller

Publications (1)

Publication Number Publication Date
GB1441502A true GB1441502A (en) 1976-07-07

Family

ID=23586299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3802874A Expired GB1441502A (en) 1973-09-26 1974-08-30 Low speed mechanical aerator impeller

Country Status (8)

Country Link
US (1) US3904714A (en)
JP (1) JPS5852686B2 (en)
BE (1) BE819964A (en)
FR (1) FR2257799A1 (en)
GB (1) GB1441502A (en)
IT (1) IT1030060B (en)
NL (1) NL7412642A (en)
SE (1) SE7412092L (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313114A1 (en) * 1975-06-04 1976-12-31 Procedes Sem NEW IMPROVEMENTS TO PROPELLERS FOR MIXERS
JPS6031537B2 (en) * 1981-11-20 1985-07-23 聡 砂田 Gas-liquid contact device
ES8407163A1 (en) * 1982-10-28 1984-09-01 Goodwin R Int Ltd Agitating particulate solids.
US4652382A (en) * 1984-10-19 1987-03-24 International Waste Water Reclamation Technologies, Inc. Process and apparatus for continuously treating sewage wastewater by chemical oxidation
US5040900A (en) * 1989-06-16 1991-08-20 United States Pollution Control Company, Inc. Sludge stabilizing method and apparatus
US4943165A (en) * 1989-06-16 1990-07-24 United States Pollution Control Company, Inc. Sludge stabilizing method and apparatus
US20040188334A1 (en) * 1998-09-28 2004-09-30 Mcwhirter John R. Novel biochemical oxidation system
US6224041B1 (en) 1999-05-28 2001-05-01 Smith & Loveless, Inc. Splash plate structure for aerators
JP2010042411A (en) * 2009-09-25 2010-02-25 Penn State Research Foundation Surface aeration blade wheel
US9962665B2 (en) 2012-06-20 2018-05-08 Philadelphia Mixing Solutions, Ltd. High efficiency, non-ragging, formed axial impeller
US10173184B2 (en) * 2015-03-25 2019-01-08 Schlumberger Technology Corporation Blender for mixing and pumping solids and fluids and method of use thereof
NO344723B1 (en) * 2018-05-16 2020-03-23 Tore Hystad Centrifugal pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072944A (en) * 1934-12-21 1937-03-09 Chicago Pump Co Aerator
US2354653A (en) * 1940-06-11 1944-08-01 Gen Electric Impeller
US2346366A (en) * 1941-12-29 1944-04-11 Lewis H Durdin Mechanical aerator
FR88774E (en) * 1962-05-07 1967-06-07
US3470092A (en) * 1967-05-08 1969-09-30 Degremont Sa System for the purification of waste waters

Also Published As

Publication number Publication date
FR2257799A1 (en) 1975-08-08
US3904714A (en) 1975-09-09
IT1030060B (en) 1979-03-30
JPS5852686B2 (en) 1983-11-24
JPS5059858A (en) 1975-05-23
SE7412092L (en) 1975-03-27
BE819964A (en) 1975-01-16
NL7412642A (en) 1975-04-01
AU7349074A (en) 1976-03-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee