DE1191339B - Device for the finest distribution of gases in liquids - Google Patents
Device for the finest distribution of gases in liquidsInfo
- Publication number
- DE1191339B DE1191339B DEP31372A DEP0031372A DE1191339B DE 1191339 B DE1191339 B DE 1191339B DE P31372 A DEP31372 A DE P31372A DE P0031372 A DEP0031372 A DE P0031372A DE 1191339 B DE1191339 B DE 1191339B
- Authority
- DE
- Germany
- Prior art keywords
- liquid
- rotation
- channels
- gas
- gases
- 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
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
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
- B01F27/1125—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades with vanes or blades extending parallel or oblique to the stirrer axis
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- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Aviation & Aerospace Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
Vorrichtung zur feinsten Verteilung von Gasen in Flüssigkeiten Die Erfindung betrifft eine Vorrichtung zur feinsten Verteilung von Gasen in Flüssigkeiten. Unter »Gas« ist im folgenden sowohl jeder beliebige gasförmige Körper, sowohl rein als auch im Gemisch mit anderen, z. B. Sauerstoff, Kohlensäure, Wasserstoff, atmosphärischer Luft usw., als auch Dampf zu verstehen. Das »Gas« kann auch mit flüssigen oder festen feinsten Teilchen durchsetzt sein.Device for the finest distribution of gases in liquids The invention relates to a device for the finest distribution of gases in liquids. In the following, "gas" means any gaseous body, both pure as well as in a mixture with others, e.g. B. oxygen, carbonic acid, hydrogen, atmospheric To understand air, etc., as well as steam. The "gas" can also be mixed with liquid or solid be interspersed with the finest particles.
Bekannte Vorrichtungen zur Verteilung von Gasen in Flüssigkeiten bestehen aus einer zugleich zur Gaszufuhr dienenden Hohlwelle mit einer hohlen Nabe, an die sich Hohlkörper anschließen, welche mittels der Welle in dem die zu begasende Flüssigkeit enthaltenden Gefäß in Drehung versetzt werden. Known devices for the distribution of gases in liquids consist of a hollow shaft with a hollow hub, which is also used for gas supply, connected to the hollow body, which by means of the shaft in which the to be gassed Liquid containing vessel are set in rotation.
Diese rotierenden Hohlkörper haben meist die Form von langen Rohren oder Hohlflügeln, die an ihrer Oberfläche Öffnungen für den Durchtritt des Gases und für dessen Verteilung in der Flüssigkeit aufweisen. Besonders bewährt haben sich hierbei flügelartige Hohlkörper mit stromlinienförmigem Querschnitt.These rotating hollow bodies usually have the shape of long tubes or hollow wings, which have openings on their surface for the passage of the gas and for its distribution in the liquid. Have proven particularly effective here wing-like hollow body with a streamlined cross-section.
Bei einer anderen Ausführungsform solcher Verteiler wird der rotierende Hohlkörper zugleich als Pumpe für das Ansaugen des Gases durch seine Hohlwelle verwendet, und die Austrittsöffnungen im Hohlkörper sind dabei so angeordnet, daß von diesen Öffnungen ein Gas-Flüssigkeits-Gemisch radial nach außen gegen die Leitflächen eines das Gas verteilenden Stators geschleudert wird. In another embodiment of such a distributor, the rotating Hollow body also used as a pump for sucking in the gas through its hollow shaft, and the outlet openings in the hollow body are arranged so that of these Openings a gas-liquid mixture radially outwards against the baffles of a the gas distributing stator is thrown.
Es ist ferner schon vorgeschlagen worden, die Leitvorrichtungen im wesentlichen über ihre Gesamtlänge als einfache, rückseitig durchgehend offene Rinnen auszubilden und mit so hoher Geschwindigkeit in Rotation zu versetzen, daß hinter den Leitvorrichtungen in der Flüssigkeit langgestreckte Vakuolen entstehen, um so eine besonders wirksame Verteilung des Gases im Wirbelzopf der Vakuolen zu erzielen. It has also been proposed that the guiding devices in essentially as simple channels that are open at the rear over their entire length to train and to set in rotation at such a high speed that behind elongated vacuoles arise in the liquid in the guide devices, so as to do so to achieve a particularly effective distribution of the gas in the vortex braid of the vacuoles.
Es wurde nun gefunden, daß derartige rinnenartige Leitvorrichtungen für die Erzeugung der Vakuolen auf der Rückseite nicht offen sein müssen, weil sich die Vakuolen jedenfalls bei hinreichender Rotationsgeschwindigkeit der Rinnen, ausgehend von den äußersten Mantellinien der Rinnen, mit Stromlinienprofil ausbilden. Diese Tatsache wird erfindungsgemäß in nutzbringender Weise ausgewertet, um in derartigen rinnenartigen Leitvorrichtungen Flüssigkeitskanäle auszubilden, die vorteilhaft für die Ableitung von begaster Flüssigkeit herangezogen werden können. It has now been found that such channel-like guide devices for the creation of the vacuoles on the rear side do not have to be open, because the vacuoles, in any case, at a sufficient speed of rotation of the grooves from the outermost surface lines of the channels, form with a streamlined profile. These According to the invention, fact is exploited in a useful manner in order to obtain such Form channel-like guide devices liquid channels that are advantageous can be used for the drainage of fumigated liquid.
Zu diesem Zweck geht die Erfindung aus von einer Vorrichtung zur feinsten Verteilung von Gasen in Flüssigkeiten mit Hilfe von radial zu einer mindestens angenähert vertikalen Drehachse angeordneten rotierenden Leitvorrichtungen, an deren Rückseite das Gas unter Druck zugeführt wird und die mit einer derartigen Geschwindigkeit umlaufen, daß auf ihren Rückseiten Vakuolen in der Flüssigkeit entstehen. Die Erfindung besteht dabei darin, daß die Leitvorrichtungen als mit ihrer konvexen Vorderseite in die Drehrichtung weisende, rückseitig geschlossene Rinnen ausgebildet sind, die auf ihren konvexen Vorderseiten nahe dem Staupunkt der Flüssigkeit Öffnungen für den Eintritt der Flüssigkeit in von der geschlossenen Rinne gebildete, mit einer zentralen Ableitung verbundene Flüssigkeitskanäle aufweisen. For this purpose, the invention is based on a device for finest distribution of gases in liquids using radial to at least one approximately vertical axis of rotation arranged rotating guide devices, on their Back the gas is supplied under pressure and at such a rate circulate so that vacuoles arise in the liquid on their backsides. The invention consists in the fact that the guide devices as with their convex front Grooves which are closed at the rear and point in the direction of rotation are formed which on their convex fronts near the stagnation point of the liquid openings for the entry of the liquid into formed by the closed channel, with a have central discharge connected fluid channels.
Vorzugsweise sind die Öffnungen der Flüssigkeitskanäle mit zunehmendem Abstand von der Drehachse der Rinnen größer bemessen, so daß der freie Querschnitt dieser Öffnungen etwa proportional den von ihnen bestrichenen Flächen ist und daher der Flüssigkeitabzug an allen Stellen des Gefäßquerschnittes ungefähr gleichmäßig erfolgt. The openings of the liquid channels are preferably with increasing The distance from the axis of rotation of the channels should be larger, so that the free cross-section of these openings is approximately proportional to the areas covered by them and therefore the liquid is withdrawn approximately evenly at all points in the cross-section of the vessel he follows.
Die Erfindung ist besonders zweckmäßig in Fällen anwendbar, wo aus bestimmten, meist verfahrensbedingten Gründen eine kurze Verweilzeit des Gases in der zu begasenden Flüssigkeit erwünscht ist. Um hierbei eine möglichst weitgehende Ausnutzung der wirksamen Bestandteile des Gases zu erzielen, wird zweckmäßig die zu begasende (frische) Flüssigkeit auf der Oberfiächce des Gefäßes verrieselt; die Flüssigkeit sinkt dann abwärts, den aufsteigenden Gasblasen entgegen, wobei auf diesem Wege die Begasung im Gegenstrom stattfindet. Die begaste Flüssigkeit kann hierbei durch die erfindungsgemäß ausgestaltete Leitvorrichtung aufgenommen und über deren Flüssigkeitskanal und die zentrale Anschlußleitung nach außen abgeführt werden. The invention is particularly expediently applicable in cases where out certain, mostly process-related reasons, a short residence time of the gas in the liquid to be gassed is desired. To do this as far as possible To achieve utilization of the active constituents of the gas is expedient (fresh) liquid to be fumigated trickles onto the surface of the vessel; the Liquid then sinks downwards, counter to the rising gas bubbles, whereby up this way the fumigation takes place in countercurrent. The fumigated liquid can recorded by the guide device designed according to the invention and Discharged to the outside via the liquid channel and the central connecting line will.
In der Zeichnung ist schematisch ein Ausführungsbeispiel der Erfindung dargestellt, wobei aber alle nicht unmittelbar mit der Erfindung zusammenhängenden Einzelheiten, wie Antrieb sowie Zuleitung von Gas und Flüssigkeit zu dem zu begasenden Gefäß usw., fortgelassen worden sind. An exemplary embodiment of the invention is shown schematically in the drawing shown, but all not directly related to the invention Details such as drive and supply of gas and liquid to the gas to be fumigated Vessel, etc., have been omitted.
Fig. 1 und 2 stellen eine teilweise geschnittene Seitenansicht bzw. eine teilweise geschnittene Draufsicht einer Verteilvorrichtung gemäß der Erfindung dar; F i g. 3 und 4 zeigen Querschnitte durch die Leitvorrichtung nach den Linien 3-3 bzw. 44 in F i g. 2. Figs. 1 and 2 show a partially sectioned side view and a partially sectioned plan view of a distribution device according to the invention dar; F i g. 3 and 4 show cross sections through the guide device according to the lines 3-3 and 44 in FIG. 2.
Bei der dargestellten Verteilvorrichtung wird das zu verteilende Gas über eine Rohrleitung a1 einer hohlen Nabe a zugeführt, die entweder von unten her mittels einer zusätzlichen Welle oder aber von oben her mittels der in diesem Falle zugleich als Hohlwelle dienenden Rohrleitung a3 in Drehung versetzt wird. Mit der hohlen Nabe a bzw. mit einer hohlkörperartigen Verlängerung d derselben sind rinnenartige Leitvorrichtungen b verbunden, deren konvexe Seite in der Drehrichtung vorn liegt. Diese Leitvorrichtungen b verlaufen von der Drehachse aus zweckmäßig geradlinig bis in die Nähe der Gefäßwandung. Die dargestellte Vorrichtung ist mit zwei diametral gegenüberliegenden Leitvorrichtungen ausgestattet. Die Anzahl dieser Leitvorrichtungen kann natürlich erhöht werden, solange die von einer Leitvorrichtung erzeugte Vakuole nicht durch die nachfolgende Leitvorrichtung gestört wird. In the case of the distribution device shown, the Gas is fed via a pipe a1 to a hollow hub a, either from below by means of an additional shaft or from above by means of the one in this Case at the same time serving as a hollow shaft pipe a3 is set in rotation. With the hollow hub a or with a hollow body-like extension d of the same are connected trough-like guide devices b, the convex side of which in the direction of rotation is in front. These guide devices b expediently run from the axis of rotation straight up to the vicinity of the vessel wall. The device shown is with equipped with two diametrically opposed guiding devices. The number of these Guides can of course be increased as long as that of a guide created vacuole is not disturbed by the following guide device.
Jede rinnenartige Leitvorrichtung b, die an den Hohlkörperansatz a' der Nabe a anschließt, ist, wie die Querschnitte nach den F i g. 3 und 4 zeigen, auf der Rückseite durch ein Stegblech e verschlossen, so daß sie einen Flüssigkeitskanal h bildet. Dieser Ka- nal h mündet im Bereich der Nabe a in eine Ableitung i für die begaste Flüssigkeit. Each channel-like guide device b, which is attached to the hollow body approach a 'connects to the hub a, is how the cross-sections according to FIGS. 3 and 4 show closed on the back by a web plate e, so that it forms a fluid channel h forms. This ca nal h opens into a derivative i for the in the area of the hub a fumigated liquid.
Wenn diese Verteilvorrichtung im Sinne des in F i g. 2 eingezeichneten Pfeils in Drehung versetzt wird, so bilden sich hinter den Rinnen b Vakuolen aus, in deren Innerem sich das über die Hohlwelle at, die Nabe a und deren Verlängerung a' zuströmende Gas nach außen fortbewegt. Das Gas wird zum Teil bereits durch die die Vakuole umströmende Flüssigkeit in kleine Blasen aufgelöst, im wesentlichen aber erst im Wirbelzopf der Vakuole zu feinsten Blasen zerrieben. Die begaste Flüssigkeit dringt unter der Wirkung des Staudruckes durch die Öffnungen I in den Kanal h ein und wird über die Ableitung i dem Gefäß entnommen. If this distribution device in the sense of FIG. 2 drawn Is set in rotation, so vacuoles form behind the grooves b, inside the hollow shaft at, the hub a and its extension a 'inflowing gas is moved to the outside. The gas is partly already through the liquid flowing around the vacuole dissolved into small bubbles, essentially but it was only in the vortex braid of the vacuole that it was ground into the finest bubbles. The fumigated liquid penetrates through the openings I into the channel h under the effect of the dynamic pressure and is taken from the vessel via lead i.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1191339X | 1957-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1191339B true DE1191339B (en) | 1965-04-22 |
Family
ID=3686902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP31372A Pending DE1191339B (en) | 1957-04-20 | 1957-10-04 | Device for the finest distribution of gases in liquids |
Country Status (1)
Country | Link |
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DE (1) | DE1191339B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4818445A (en) * | 1986-05-12 | 1989-04-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Apparatus for treating a solution or a slurry solution |
EP0441505A1 (en) * | 1990-02-05 | 1991-08-14 | Imperial Chemical Industries Plc | Agitators |
-
1957
- 1957-10-04 DE DEP31372A patent/DE1191339B/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4818445A (en) * | 1986-05-12 | 1989-04-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Apparatus for treating a solution or a slurry solution |
EP0441505A1 (en) * | 1990-02-05 | 1991-08-14 | Imperial Chemical Industries Plc | Agitators |
US5246289A (en) * | 1990-02-05 | 1993-09-21 | Imperial Chemical Industries Plc | Agitator having streamlined blades for reduced cavitation |
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