DE1089368B - Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers - Google Patents

Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers

Info

Publication number
DE1089368B
DE1089368B DEA31510A DEA0031510A DE1089368B DE 1089368 B DE1089368 B DE 1089368B DE A31510 A DEA31510 A DE A31510A DE A0031510 A DEA0031510 A DE A0031510A DE 1089368 B DE1089368 B DE 1089368B
Authority
DE
Germany
Prior art keywords
gas
outlet openings
gas outlet
containing fibers
liquids containing
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.)
Pending
Application number
DEA31510A
Other languages
German (de)
Inventor
Dipl-Ing Werner Schwameis
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.)
Howden Turbo GmbH
Original Assignee
Kuehnle Kopp and Kausch AG
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 Kuehnle Kopp and Kausch AG filed Critical Kuehnle Kopp and Kausch AG
Priority to DEA31510A priority Critical patent/DE1089368B/en
Priority to NL249059A priority patent/NL108431C/en
Priority to CH246460A priority patent/CH380087A/en
Priority to FR820512A priority patent/FR1250266A/en
Publication of DE1089368B publication Critical patent/DE1089368B/en
Pending 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
    • 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
    • B01F23/2331—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
    • B01F23/23311—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 through a hollow stirrer 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
    • B01F23/233—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
    • B01F23/23314—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 through a hollow stirrer element
    • 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
    • B01F27/1133—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller the impeller being of airfoil or aerofoil type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0422—Numerical values of angles
    • 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
    • B01F27/1131—Propeller-shaped stirrers for producing an axial flow, e.g. shaped like a ship or aircraft propeller with holes in the propeller blade surface
    • 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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Description

Umlaufender, mit Gas austritts öffnungen versehener Feinstbegas er für faserstoffhaltige Flüssigkeiten Die Erfindung betrifft einen umlaufenden Feinstbegaser, d. h. ein Gerät, mit dem Luft oder andere Gase in feinsten Blasen einer Flüssigkeit zugeführt werden um in dieser Absorptions- oder Desorptionsvorgänge durchzuführen. Speziell ist sie auf einen Feinstbegaser für faserstoffhaltige Flüssigkeiten gerichtet.Circumferential fine gas provided with gas outlet openings for fibrous liquids The invention relates to a circulating fine gas aerator, d. H. a device with which air or other gases in the finest bubbles of a liquid are supplied in order to carry out absorption or desorption processes in this. It is specifically aimed at a very fine gas aerator for liquids containing fibers.

Die zu bearbeitenden Flüssigkeiten haben häufig die Zähigkeit von Schlamm oder nehmen diese Zähigkeit während der Bearbeitung an; insbesondere ist es aber störend, daß sie oft Faserstoffe enthalten. Demgemäß variieren die mechanischen Eigenschaften von Fall zu Fall und ändern sich im Laufe der Bearbeitung. Da außerdem die Umlaufgeschwindigkeit der umlaufenden Feinstbegaser je nach Bedarf verschieden gewählt wird, bereitet die zweckmäßige Gestaltung der Verteilerflügel besondere Schwierigkeiten. Es war bis jetzt keine Form bekannt, die unter verschiedenen Arbeitsbedingungen einen geringen Kraftbedarf sichert und gleichzeitig ein Festhaften von Fasern u. dgl. an der Vorderkante verhindert. The fluids to be processed often have the viscosity of Mud or take on this toughness during machining; in particular is but it is bothersome that they often contain fiber. Accordingly, the mechanical ones vary Properties from case to case and change in the course of processing. Since also the circulating speed of the circulating fine aerators varies as required is chosen, the appropriate design of the distributor blades prepares special Trouble. Up until now, no form was known that would work under different working conditions a low power requirement and at the same time a firm adherence of fibers u. Like. Prevented at the front edge.

Durch Vergleichsversuche unter den verschiedensten Betriebsbedingungen wurde nun - ausgehend von der bekannten S-Form eines Hohlflügelpaares -festgestellt, daß die erwähnten Forderungen von Hohlflügeln erfüllt werden, deren Vorderkanten entgegen der Umlaufrichtung nach einer solchen logarithmischen Spirale zurückgebogen sind, bei welcher die Tangente in jedem Punkt mit dem zugehörigen Leitstrahl einen Winkel von mehr als 40 bis vorzugsweise von etwa 450 bildet. Dabei ist es unerwartet, daß unabhängig von der Zähigkeit der Flüssigkeit, der Beschaffenheit der Fasern und der Umlaufgeschwindigkeit ein geringer Arbeitswiderstand und ein Herausschieben der Fasern nach außen erhalten werden, wenn bei allen Arbeitsbedingungen gleichgeformte Flügel benutzt werden, bei denen eine logarithmische Spirale der angegebenen mathematischen Eigenschaft die Vorderkante festlegt. Diese überraschende Erscheinung ist nach den Versuchen eine Folge des erfindungsgemäßen logarithmischen Kurvenverlaufes. Through comparative tests under a wide variety of operating conditions has now been established - based on the well-known S-shape of a pair of hollow wings - that the aforementioned requirements are met by hollow wings, the leading edges bent back against the direction of rotation after such a logarithmic spiral are, in which the tangent in each point with the associated guide ray one Forms angles of greater than 40 to preferably about 450. It is unexpected that regardless of the viscosity of the liquid, the nature of the fibers and the rotational speed, a low work resistance and a pushing out the fibers are preserved outwardly if uniformly shaped in all working conditions Wings are used in which a logarithmic spiral of the specified mathematical Property defines the leading edge. This surprising phenomenon is after the Try a sequence of the logarithmic curve according to the invention.

Im Rahmen der Erfindung bietet sich eine besonders günstige Möglichkeit für die Zuführung der Luft oder eines anderen Gases. Ein tragflügelartig gestaltetes Profil hat vor der Linie der größten Profildicke eine Zone höchster Relativgeschwindigkeit der Strömung und damit des geringsten Druckes. (Der Begriff eines tragflügelartig profilierten Hohlflügels bedeutet nicht, daß der Hohlflügel beim Umlauf einen Auftrieb erzeugen soll; vielmehr ist hiermit nur gesagt, daß das strömungsmäßig günstigste, einen möglichst kleinen Flüssigkeitswiderstand erzeugende Profil gewählt werden soll.) Dabei liegt die Strömungsrichtung innerhalb dieser Zone nicht parallel zur Vorderkante, sondern nähert sich stark der Umlaufrichtung. Bringt man also bei tragfiügelartig gestalteten Profilen in der genannten Zone Belüftungsöffnungen an, durch die Luft oder Gas aus dem Hohlflügel in die Flüssigkeit übertreten kann, so hat man den Vorteil einer hohen Relativgeschwindigkeit, eines niedrigen Flüssigkeitsdruckes, d. h. eines geringen Gasdruckbedarfes, und außerdem führt die Strömungsrichtung nicht von einer Öffnung zur anderen, obgleich die Zone parallel zur Vorderkante verläuft, d. h., die gesamte Flüssigkeitssäule wird gleichmäßig belüftet oder begast. In the context of the invention, there is a particularly favorable possibility for the supply of air or another gas. A wing-like designed The profile has a zone of the highest relative speed in front of the line with the greatest profile thickness the flow and thus the lowest pressure. (The notion of an airfoil profiled hollow wing does not mean that the hollow wing is buoyant during rotation should produce; rather, this only means that the most favorable in terms of flow, the smallest possible liquid resistance generating profile can be selected should.) The direction of flow within this zone is not parallel to the Leading edge, but rather approaches the direction of rotation. So if you bring it to the wing-like designed profiles in said zone ventilation openings through the air or gas from the hollow wing can pass into the liquid, then one has the advantage a high relative speed, a low fluid pressure, d. H. one low gas pressure requirement, and also the direction of flow does not lead from one Opening to the other, although the zone is parallel to the leading edge, i.e. H., the entire column of liquid is aerated or gassed evenly.

In der Zeichnung ist ein Ausführungsbeispiel für den Gegenstand der Erfindung schematisch dargestellt. In the drawing is an embodiment of the subject matter of Invention shown schematically.

Es zeigt Fig. 1 eine Draufsicht auf einen Feinstbegaser, Fig. 2 eine Seitenansicht des Gegenstandes der Fig. 1 und Fig. 3 einen Querschnitt rach der Linie III-III der Fig. 1.1 shows a plan view of an ultra-fine gas gasifier, and FIG. 2 shows a Side view of the object of Fig. 1 and Fig. 3 shows a cross section of the Line III-III of FIG. 1.

Mit der nicht dargestellten Hohlachse, welche gleichzeitig zur Zuführung des Gases oder der Luft dient, wird der Flansch 1 verbunden. Dieser trägt zwei tragflügelartig profilierte, symmetrisch zur Drehachse angeordnete Hohlflügel 2 und 3, welche in bezug auf die Achse des Flansches ausgewuchtet sind. Verwendet man nur einen oder mehr als zwei Hohlflügel, so ist ebenfalls für eine Auswuchtung Sorge zu tragen. With the hollow axle, not shown, which is used at the same time as the feed the gas or air is used, the flange 1 is connected. This carries two wing-like profiled hollow wings 2 and 3 arranged symmetrically to the axis of rotation, which in are balanced with respect to the axis of the flange. If you only use one or If there are more than two hollow wings, it is also necessary to ensure that they are balanced.

Der Feinstbegaser läuft in Fig. 1 im Uhrzeigersinn um, und die Vorderkanten 4 und 5 der Hohlflügel 2 bzw. 3 sind entgegengesetzt dem Uhrzeigersinn nach einer logarithmischen Spirale zurückgebogen. Diese logarithmische Spirale ist dadurch bestimmt, daß die Tangente x mit dem Leitstrahl r für jeden Punkt der Vorderkante einen Winkel von ß = 450 bildet. The Feinstbegaser runs in Fig. 1 clockwise, and the front edges 4 and 5 of the hollow wings 2 and 3, respectively, are counterclockwise after one logarithmic spiral bent back. This logarithmic spiral is through it determines that the tangent x with the guide ray r for each point of the leading edge forms an angle of ß = 450.

Parallel zu den Vorderkanten 4 und 5 verlaufen Lochreihen 6 und 7. Diese Lochreihen liegen vor den Linien 8 der größten Profil dicke im Bereich der höchsten Relativgeschwindigkeit der Strömung. Die Lochreihen können auf der Oberseite der Flügel, auf der Unterseite der Flügel oder - wie in Fig. 3 dargestellt - sowohl auf der Unterseite als auch auf der Oberseite vorgesehen sein. Bei der gewählten Gestaltung kommt man mit verhältnismäßig wenigen großen Öffnungen, z. B. mit zehn bis zwanzig Öffnungen von 5 bis 15 mm Durchmesser bei einem Flügel von 1000 mm Radius, aus. Dies bedeutet eine wensentliche Vereinfachung der Herstellung und der Pflege gegenüber bekannten Ausführungen mit einer großen Anzahl kleiner Öffnungen. Rows of holes 6 and 7 run parallel to the front edges 4 and 5. These rows of holes are in front of the Lines 8 of the greatest profile thickness in the area of the highest relative velocity of the flow. The rows of holes can on the top of the wings, on the underside of the wings or - as in Fig. 3 shown - be provided both on the bottom and on the top. With the chosen design one comes with relatively few large openings, z. B. with ten to twenty openings of 5 to 15 mm in diameter in a wing from a radius of 1000 mm. This means a considerable simplification of the production and the care compared to known designs with a large number of smaller ones Openings.

PATENTANSPROCHE: 1. Umlaufender, mit Gasaustrittsöffnungen versehener Feinstbegaser für faserstoffhaltige Flüssig- keiten mit wenigstens einem in Umlaufrichtung zurückgebogenen Hohlflügel, dadurch gekennzeichnet, daß die Hohlflügelvorderkante (4, 5) nach einer solchen logarithmischen Spirale zurückgebogen ist, bei welcher die Tangente (x) in jedem Punkt mit dem zugehörigen Leitstrahl (r) einen Winkel (4) von mehr als 40 bis vorzugsweise von etwa 45 bildet. PATENT CLAIM: 1. Circumferential, provided with gas outlet openings Fine gas aerators for fibrous liquid opportunities with at least one in the direction of rotation curved back hollow wing, characterized in that the hollow wing leading edge (4, 5) is bent back to such a logarithmic spiral, in which the tangent (x) at each point forms an angle with the associated guide ray (r) (4) from greater than 40 to preferably from about 45 forms.

Claims (1)

2. Feinstbegaser nach Anspruch 1, dadurch gekennzeichnet, daß wenigstens auf einer Seite jedes tragflügelartig profilierten Hohlflügels (2, 3) vor der Linie der größten Profildicke (8) wenigstens eine parallel zur Vorderkante verlaufende Reihe von Gasaustrittsöffnungen (6, 7) vorgesehen ist. 2. Feinstbegaser according to claim 1, characterized in that at least on one side of each airfoil-like profiled hollow wing (2, 3) in front of the line of the largest profile thickness (8) at least one running parallel to the front edge Row of gas outlet openings (6, 7) is provided. In Betracht gezogene Druckschriften: Österreichische Patentschrift Nr. 193 331. Publications considered: Austrian patent specification No. 193 331.
DEA31510A 1959-03-05 1959-03-05 Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers Pending DE1089368B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DEA31510A DE1089368B (en) 1959-03-05 1959-03-05 Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers
NL249059A NL108431C (en) 1959-03-05 1960-03-04 Rotatable device provided with at least one gas outlet opening for supplying gases into liquids in a finely divided state, which device has at least one hollow wing convexly curved in a radial plane against the direction of rotation.
CH246460A CH380087A (en) 1959-03-05 1960-03-04 Circumferential fine gas gasifier
FR820512A FR1250266A (en) 1959-03-05 1960-03-05 Device for distributing gas in a fluid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA31510A DE1089368B (en) 1959-03-05 1959-03-05 Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers

Publications (1)

Publication Number Publication Date
DE1089368B true DE1089368B (en) 1960-09-22

Family

ID=6927523

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA31510A Pending DE1089368B (en) 1959-03-05 1959-03-05 Circumferential fine gas aerator provided with gas outlet openings for liquids containing fibers

Country Status (4)

Country Link
CH (1) CH380087A (en)
DE (1) DE1089368B (en)
FR (1) FR1250266A (en)
NL (1) NL108431C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0954372A1 (en) * 1996-02-01 1999-11-10 Biomixer Corporation Gas and liquid mixing apparatus and methods
EP3342480A1 (en) * 2016-12-27 2018-07-04 Zeppelin Systems GmbH Mixing tool for a mixer and mixer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677528A (en) * 1970-12-31 1972-07-18 Shell Oil Co Fluid diffusion apparatus
US4231974A (en) * 1979-01-29 1980-11-04 General Signal Corporation Fluids mixing apparatus
US5300261A (en) * 1992-11-12 1994-04-05 Richard Von Berg Liquid aerating apparatus
US6808165B1 (en) 2003-04-30 2004-10-26 Smith & Loveless, Inc. Apparatus for mixing and introducing gas into a large body of liquid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT193331B (en) * 1953-02-24 1957-11-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT193331B (en) * 1953-02-24 1957-11-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0954372A1 (en) * 1996-02-01 1999-11-10 Biomixer Corporation Gas and liquid mixing apparatus and methods
EP0954372A4 (en) * 1996-02-01 2000-04-19 Biomixer Corp Gas and liquid mixing apparatus and methods
EP3342480A1 (en) * 2016-12-27 2018-07-04 Zeppelin Systems GmbH Mixing tool for a mixer and mixer

Also Published As

Publication number Publication date
NL108431C (en) 1964-05-15
FR1250266A (en) 1961-01-06
CH380087A (en) 1964-07-31

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