WO2003011442A1 - Aerator plate for water aeration - Google Patents

Aerator plate for water aeration Download PDF

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Publication number
WO2003011442A1
WO2003011442A1 PCT/CH2002/000398 CH0200398W WO03011442A1 WO 2003011442 A1 WO2003011442 A1 WO 2003011442A1 CH 0200398 W CH0200398 W CH 0200398W WO 03011442 A1 WO03011442 A1 WO 03011442A1
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WO
WIPO (PCT)
Prior art keywords
membrane
aerator
profiles
base plate
plate according
Prior art date
Application number
PCT/CH2002/000398
Other languages
German (de)
French (fr)
Inventor
Urs Heck
Original Assignee
Bontec 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 Bontec Ag filed Critical Bontec Ag
Publication of WO2003011442A1 publication Critical patent/WO2003011442A1/en

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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
    • C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0692—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining flexible sheets to other sheets or plates or to strips or bars
    • 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 relates to an aerator plate for water ventilation according to the preamble of the first claim.
  • Aerator plates of this type are used in particular for water purification in waste water collection basins, and are used to supply air, oxygen or other gases for converting waste water into drinking water.
  • Aerator plates of this type are already known and i.a. in (A) EP-A-0 586 329.
  • the version (A) described therein has proven to be very useful, but is associated with properties that can be improved. It is among other things to the execution of the recess for receiving the fastening device for holding the perforated membrane, through the holes of which oxygen is supplied. Furthermore, the shape of the cross member for the top grate has not proven to be optimal.
  • version (B) has the disadvantage that there is too little scope for air circulation between the holding-down elements and the plate-shaped basic element.
  • the object of the invention is therefore to provide an aerator plate for water aeration, which does not have the disadvantages of the existing designs.
  • the aerator plate sought is intended to facilitate both manufacture and maintenance or repair, or to reduce the associated costs in comparison to previous versions.
  • the aerator plate thus created has, among other things, the following advantages:
  • Fig. 1 is an oblique representation of an aerator plate with base plate
  • FIG. 2 shows a cross section through FIG. 1 in the operating state
  • FIG. 3 shows a detail from FIG. 2 on a larger scale
  • FIG. 5 shows a variant of FIG. 3,
  • FIG. 7 shows a cross section through the aerator plate in FIG. 6,
  • Fig. 8 is a longitudinal section through the aerator plate in Fig. 7, and
  • Fig. 9 is a partial plan view of the aerator plate.
  • an aerator plate 1 is shown with a base plate 2 and an attached membrane 3 with a pipe connection 4 for the supply of fresh air, oxygen or other gases.
  • the base plate 2 is advantageously made of Made of plastic, but can also consist of wood, wood fibers or the like.
  • the membrane 3 is preferably a rubber-elastic gas or air distribution film provided with openings 16. The gas or air supply through the pipe connection 4 to the space between the base plate 2 and the membrane 3 is dimensioned in relation to the openings 16 in the membrane 3 such that it bulges under an internal pressure, as shown in FIG. 2.
  • a preferably endless fastening device 5 is shown on each side of the aerator plate 1, which connects the membrane 3 to the base plate 2.
  • This device 5 consists of two L-shaped profiles 6 and 7, the back flanges of which face each other, and between the two profiles 6, 7, a rod profile 8 is arranged, which with a slight pressure in the slot between the two L-profiles 6, 7 is pressed.
  • the two horizontal L-profiles 6, 7 thus engage in the aerator plate 1 like a hook.
  • the rod profile 8 is slightly wedge-shaped at the bottom on the two edges 9, 9 'so that it can be introduced more easily into the gap (FIGS. 3-5).
  • the fastening device 5 further comprises a clamping profile 10, which above all presses the clamping rod 8 down and holds it there, which is done by means of a screw 11 and a washer 12.
  • This screw 11 is shown as a clamping screw, but can also be any other type, which in turn depends on the material from which the base plate is made.
  • the membrane 3 in Fig. 3 is not clamped between the base plate 2 and the clamping profile 10, but ends in a gap 13.
  • the membrane 3 in FIG. 5 is additionally held between the clamping profile 10 and the base plate 2 by clamping action.
  • the individual profiles 6 to 8 can be flexible rods or rings that run around the aerator plate 1.
  • the cross sections of the clamping profiles 6,7 and 8 are designed in such a way that they can be bent easily and therefore no special measures have to be taken in the corner areas.
  • the membrane is anchored much better in the present version, which among other things. the reason for this is that it is bent eight times instead of only three times.
  • a bead 15 (gluing FIG. 3) is applied under the clamping profile 6. With the gluing, it is also possible to dispense with the clamping profile 10
  • Another advantage of the present invention is the fact that there is no corrugation in the fastening area. Such corrugation can cause injury to the membrane when inserting the clamping profiles.
  • FIGS. 2, 3 and 5 show a section of the aerator plate 1 with two side members and three cross members 23 and with the pipe connection 4. Furthermore, four pipes 24 are shown, which serve to hold down the membrane 3. Between the tubes 24, the membrane 3 bulges upwards, as is most clearly shown in FIGS. 2, 3 and 5.
  • the cross members 23 and the tubes 24 are not connected to the base plate 2, but are guided in the two longitudinal members 21.
  • Fig. 9 shows a partial plan view of one end of the aerator plate 1 with the rounded corners.
  • the base plate 2 covers the underlying cross bars 23.
  • the present embodiment has a number of advantages over existing designs. For example, the use of tubes 24 instead of previous strips is a significant advance because the annoying accumulation of contaminants practically no longer occurs. And if this accumulation should occur anyway, it can be easily removed.
  • Another advantage is the safe and harmless mounting of the membrane (3) in the T-shaped recess in the base plate, in which the previous corrugation is completely eliminated.
  • the elimination of corrugation is also associated with cost savings. While the production of the corrugation is a complex process, the milling of the T-shaped recess is very simple and inexpensive.
  • the profiles 6 to 8 can either be ring-shaped or consist of two or more parts.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to an aerator plate (1) comprising a base plate (2) and a membrane (3), in addition to a fixing device (5) enclosing two angle profiles (6, 7), a rod profile (8) being placed between said angle profiles. These three profiles (6-8) are retained by a clamping profile (10) that is held in press-in position by a screw (11) with a washer (12). Said three profiles (6-8) are located in a T-shaped recess, are clamped in the base plate (2) and cannot break away from said grip. This is also made possible by the fact that the membrane (3) is bent eight times. The grip also has no ribbings, thereby practically precluding any damage to the membrane (3). In order to hold down the membrane (3), tubes (24) with a circular cylindrical cross section are used as opposed to ordinary strips, thereby practically precluding any accumulation of sand and other impurities. As a result, the present embodiment provides important advantages in comparison with conventional embodiments.

Description

Belüfterplatte zur Wasserbelüftunq Aerator plate for water aeration
Die Erfindung betrifft eine Belüfterplatte zur Wasserbelüftung gemäs dem Oberbegriff des ersten Patentanspruches.The invention relates to an aerator plate for water ventilation according to the preamble of the first claim.
Derartige Belüfterplatten werden insbesondere zur Wasserreinigung in Abwassersammelbecken eingesetzt, und dienen der Zufuhr von Luft, Sauerstoff oder anderen Gasen zur Umwandlung von Abwasser in Trinkwasser.Aerator plates of this type are used in particular for water purification in waste water collection basins, and are used to supply air, oxygen or other gases for converting waste water into drinking water.
Belüfterplatten dieser Art sind bereits bekannt und u.a. in (A) EP-A-0 586 329 beschrieben. Die darin beschriebene Ausführung (A) hat sich als sehr zweckmässig erwiesen, ist jedoch mit verbesserungswürdigen Eigenschaften verbunden. Es geht dabei u.a. um die Ausführung der Ausnehmung zur Aufnahme der Befestigungsvorrichtung für die Halterung der gelochten Membrane, durch deren Löcher die Sauerstoffzufuhr erfolgt. Ferner hat sich die Form der Querträger für den Rostoberteil nicht als optimal erwiesen.Aerator plates of this type are already known and i.a. in (A) EP-A-0 586 329. The version (A) described therein has proven to be very useful, but is associated with properties that can be improved. It is among other things to the execution of the recess for receiving the fastening device for holding the perforated membrane, through the holes of which oxygen is supplied. Furthermore, the shape of the cross member for the top grate has not proven to be optimal.
Eine weitere Ausführung dieser Belüfterplatten ist z.B. in (B) EP-A-0 359 698 beschrieben. Diese Ausführung ist sehr aufwändig, wobei jede Längs- und Querseite der Platte jeweils mit einem separaten Anschluss versehen ist, so dass insgesamt vier Anschlüsse pro Platte erforderlich sind. Das führt zu Problemen an den vier Ecken zwischen den verschiedenen Profilabschnitten, weil die Membrane an diesen Stellen undicht ist und leicht zerreisst, was ferner auf die verwendete Art von Riffelungen zurückzuführen ist. Die gezeigten Winkelprofile sind lediglich für gerade und nicht für bogenförmige Strecken geeignet. Das Einschieben des Profils in Fig. 11 führt praktisch zwangsläufig zu einer Verletzung der Membrane.Another version of these aerator plates is e.g. in (B) EP-A-0 359 698. This design is very complex, with each longitudinal and transverse side of the plate being provided with a separate connection, so that a total of four connections are required per plate. This leads to problems at the four corners between the different profile sections, because the membrane is leaky at these points and tears easily, which is also due to the type of corrugation used. The angle profiles shown are only suitable for straight and not for curved sections. Pushing the profile in Fig. 11 practically leads to an injury to the membrane.
Zudem ist Ausführung (B) mit dem Nachteil behaftet, dass zwischen den niederhaltenden Elementen und dem plattenförmigen Grundelement zu wenig Spielraum für die Luftzirkulation zur Verfügung steht.In addition, version (B) has the disadvantage that there is too little scope for air circulation between the holding-down elements and the plate-shaped basic element.
Aufgabe der Erfindung ist somit die Schaffung einer Belüfterplatte zur Wasserbelüftung, welcher die Nachteile der bestehenden Ausführungen nicht aufweist. Die gesuchte Belüfterplatte soll sowohl die Herstellung als auch den Unterhalt bzw. die Reparatur erleichtern bzw. die damit verbundenen Kosten im Vergleich zu bisherigen Ausführungen senken.The object of the invention is therefore to provide an aerator plate for water aeration, which does not have the disadvantages of the existing designs. The aerator plate sought is intended to facilitate both manufacture and maintenance or repair, or to reduce the associated costs in comparison to previous versions.
Diese Aufgabe ist erfindungsgemäss durch die Merkmale im Kennzeichnungsteil des ersten Patentanspruches gelöst.This object is achieved according to the invention by the features in the characterizing part of the first claim.
Ausführungsformen sind in den abhängigen Ansprüchen offenbart.Embodiments are disclosed in the dependent claims.
Die so geschaffene Belüfterplatte hat gegenüber herkömmlichen Ausführungen u.a. die folgenden Vorteile:The aerator plate thus created has, among other things, the following advantages:
- eine sicherere Halterung der Membrane längs der Kanten- A more secure retention of the membrane along the edges
- eine verbesserte Abdichtung in der Längs- und Querrichtung der Membrane- An improved seal in the longitudinal and transverse directions of the membrane
- keine Durchlöcherung der Membrane- no perforation of the membrane
- eine wiederholte Wiederverwendung der Membranen ist möglich- Repeated reuse of the membranes is possible
Nachfolgend werden Ausführungsbeispiele der erfindungsgemässen Belüfterplatte anhand der Zeichnung näher erläutert. Es zeigen:Exemplary embodiments of the aerator plate according to the invention are explained in more detail below with reference to the drawing. Show it:
Fig. 1 eine schrägbildliche Darstellung einer Belüfterplatte mit Grundplatte undFig. 1 is an oblique representation of an aerator plate with base plate and
Eingeklemmter Membrane,Pinched membrane,
Fig. 2 einen Querschnitt durch Fig. 1 im Betriebszustand,2 shows a cross section through FIG. 1 in the operating state,
Fig. 3 einen Ausschnitt aus Fig. 2 in grösserem Massstab,3 shows a detail from FIG. 2 on a larger scale,
Fig. 4 eine Darstellung zur Erläuterung der Halterung der Membrane,4 is an illustration for explaining the mounting of the membrane,
Fig. 5 eine Variante zu Fig. 3,5 shows a variant of FIG. 3,
Fig. 6 eine schrägbildliche Darstellung der Belüfterplatte,6 is an oblique view of the aerator plate,
Fig. 7 einen Querschnitt durch die Belüfterplatte in Fig. 6,7 shows a cross section through the aerator plate in FIG. 6,
Fig. 8 einen Längsschnitt durch die Belüfterplatte in Fig. 7, undFig. 8 is a longitudinal section through the aerator plate in Fig. 7, and
Fig. 9 eine Teildraufsicht der Belüfterplatte.Fig. 9 is a partial plan view of the aerator plate.
In Fig. 1 und 2 ist eine Belüfterplatte 1 mit einer Grundplatte 2 und einer daran befestigten Membrane 3 mit einem Rohranschluss 4 für für die Zufuhr von Frischluft, Sauerstoff oder sonstigen Gasen dargestellt. Die Grundplatte 2 wird vorteilhaft aus Kunststoff hergestellt, kann aber auch aus Holz, Holzfasern oder dgl bestehen. Die Membrane 3 ist vorzugsweise eine gummielastische, mit Öffnungen 16 versehene Gas- oder Luftverteilerfolie. Die Gas- oder Luftzufuhr durch den Rohranschluss 4 zum Raum zwischen der Grundplatte 2 und der Membrane 3 ist im Verhältnis zu den Öffnungen 16 in der Membrane 3 derart bemessen, dass sie sich unter einem Innendruck aufwölbt, wie dies in Fig. 2 gezeigt ist.1 and 2, an aerator plate 1 is shown with a base plate 2 and an attached membrane 3 with a pipe connection 4 for the supply of fresh air, oxygen or other gases. The base plate 2 is advantageously made of Made of plastic, but can also consist of wood, wood fibers or the like. The membrane 3 is preferably a rubber-elastic gas or air distribution film provided with openings 16. The gas or air supply through the pipe connection 4 to the space between the base plate 2 and the membrane 3 is dimensioned in relation to the openings 16 in the membrane 3 such that it bulges under an internal pressure, as shown in FIG. 2.
Die Menge der durch die Öffnungen 16 fliessende Gase wird auf Grund der Ausbildung der Membrane 3 festgelegt. Beidseits der Belüfterplatte 1 ist jeweils eine vorzugsweise endlose Befestigungsvorrichtung 5 gezeigt, welche die Membrane 3 mit der Grundplatte 2 verbindet. Diese Vorrichtung 5 besteht aus zwei L-förmigen Profilen 6 und 7, deren Rückenflanschen einander zugekehrt sind, und zwischen den beiden Profilen 6,7 ist ein Stabprofil 8 angeordnet, das mit einem leichten Druck in den Schlitz zwischen den beiden L-Profilen 6,7 eingedrückt wird. Die beiden horizontalen L-Profile 6,7 greifen somit hakenartig in die Belüfterplatte 1 ein. Das Stabprofil 8 ist unten an den beiden Kanten 9,9' leicht keilförmig ausgebildet, damit es sich leichter in den Spalt einführen lässt (Fig. 3-5).The amount of the gases flowing through the openings 16 is determined on the basis of the design of the membrane 3. A preferably endless fastening device 5 is shown on each side of the aerator plate 1, which connects the membrane 3 to the base plate 2. This device 5 consists of two L-shaped profiles 6 and 7, the back flanges of which face each other, and between the two profiles 6, 7, a rod profile 8 is arranged, which with a slight pressure in the slot between the two L-profiles 6, 7 is pressed. The two horizontal L-profiles 6, 7 thus engage in the aerator plate 1 like a hook. The rod profile 8 is slightly wedge-shaped at the bottom on the two edges 9, 9 'so that it can be introduced more easily into the gap (FIGS. 3-5).
Die Befestigungsvorrichtung 5 umfasst ferner ein Klemmprofil 10, welches vor allem den Klemmstab 8 nach unten drückt und ihn dort hält, was mittels einer Schraube 11 und einer Scheibe 12 erfolgt. Diese Schraube 11 ist als Klemmschraube gezeigt, kann aber auch jede andere Art sein, was wiederum davon abhängt, aus welchem Material die Grundplatte hergestellt ist..The fastening device 5 further comprises a clamping profile 10, which above all presses the clamping rod 8 down and holds it there, which is done by means of a screw 11 and a washer 12. This screw 11 is shown as a clamping screw, but can also be any other type, which in turn depends on the material from which the base plate is made.
Aus den Fig. 3 und 5 geht hervor, dass zwei verschiedene Ausführungen vorhanden sind, wobei u.a. die Membrane 3 in Fig. 3 nicht zwischen der Grundplatte 2 und dem Klemmprofil 10 festgeklemmt ist, sondern in einem Spalt 13 endet. Dagegen wird die Membrane 3 in Fig. 5 zusätzlich zwischen dem Klemmprofil 10 und der Grundplatte 2 durch Klemmwirkung gehalten. Bei der Ausführung nach Fig. 5 ist kein eigentlicher Spalt 13 vorhanden, sondern ledigich eine Ausnehmung 14 vorhanden, die als Anschlagskante oder Führung für das Profil 6 dient.3 and 5 that there are two different designs, among other things. the membrane 3 in Fig. 3 is not clamped between the base plate 2 and the clamping profile 10, but ends in a gap 13. In contrast, the membrane 3 in FIG. 5 is additionally held between the clamping profile 10 and the base plate 2 by clamping action. In the embodiment according to FIG. 5, there is no actual gap 13, but only a recess 14, which serves as a stop edge or guide for the profile 6.
Die einzelnen Profile 6 bis 8 können biegsame Stäbe oder auch Ringe sein, die rund um die Belüfterplatte 1 laufen. Die Querschnitte der Klemmprofile 6,7 un 8 sind so gestaltet, dass sie sich leicht biegen lassen und somit in den Eckbereichen keine besonderen Massnahmen getroffen werden müssen.The individual profiles 6 to 8 can be flexible rods or rings that run around the aerator plate 1. The cross sections of the clamping profiles 6,7 and 8 are designed in such a way that they can be bent easily and therefore no special measures have to be taken in the corner areas.
Verglichen mit den herkömmlichen Ausführungen ist die Membrane bei der vorliegenden Ausführung viel besser verankert, was u.a. darauf zurückzuführen ist, dass sie achtmal anstatt nur dreimal umgebogen wird. Um bei der Ausführung nach Fig. 3 ein herausziehen der Membrane 3 aus den Klemmprofilen 6,7 sicher zu vermeiden, wird unter dem Klemmprofil 6 eine Raupe 15 (Verleimung Fig. 3) aufgebracht. Mit der Verleimung ist es auch möglich auf das Klemmprofil 10 zu verzichtenCompared to the conventional versions, the membrane is anchored much better in the present version, which among other things. the reason for this is that it is bent eight times instead of only three times. In order to reliably prevent the membrane 3 from being pulled out of the clamping profiles 6, 7 in the embodiment according to FIG. 3, a bead 15 (gluing FIG. 3) is applied under the clamping profile 6. With the gluing, it is also possible to dispense with the clamping profile 10
Ein weiterer Vorteil der vorliegenden Erfindung ist die Tatsache, dass keine Riffelung im Befestigungsbereich vorhanden ist. Eine solche Riffelung kann bei der Einbringung der Klemmprofile unter Umständen eine Verletzung der Membrane verursachen.Another advantage of the present invention is the fact that there is no corrugation in the fastening area. Such corrugation can cause injury to the membrane when inserting the clamping profiles.
Fig. 6 bis 8 zeigen einen Ausschnitt der Belüfterplatte 1 mit zwei Längsträgern und drei Querträger 23 sowie mit dem Rohranschluss 4. Ferner sind vier Rohre 24 gezeigt, die dazu dienen, die Membrane 3 niederzuhalten. Zwischen den Rohren 24 wölbt sich die Membrane 3 nach oben, wie dies am deutlichsten in den Fig. 2, 3 und 5 gezeigt ist. Die Querträger 23 sowie die Rohre 24 sind nicht mit der Grundplatte 2 verbunden, sondern in den zwei Längsträgern 21 geführt.6 to 8 show a section of the aerator plate 1 with two side members and three cross members 23 and with the pipe connection 4. Furthermore, four pipes 24 are shown, which serve to hold down the membrane 3. Between the tubes 24, the membrane 3 bulges upwards, as is most clearly shown in FIGS. 2, 3 and 5. The cross members 23 and the tubes 24 are not connected to the base plate 2, but are guided in the two longitudinal members 21.
Fig. 9 zeigt eine Teildraufsicht eines Endes der Belüfterplatte 1 mit den abgerundeten Ecken. Die Grundplatte 2 überdeckt die darunterliegenden Querstäbe 23.Fig. 9 shows a partial plan view of one end of the aerator plate 1 with the rounded corners. The base plate 2 covers the underlying cross bars 23.
Die vorliegende Ausführung weist gegnüber bestehenden Ausführungen eine Reihe von Vorteilen auf. So ist z.B. die Verwendung von Rohren 24 anstelle bisheriger Leisten ein bedeutenden Fortschritt, weil die lästige Ansammlung von Verunreinigungen praktisch nicht mehr vorkommt. Und wenn diese Ansammlung trotzdem auftreten sollte, kann sie leicht entfernt werden.The present embodiment has a number of advantages over existing designs. For example, the use of tubes 24 instead of previous strips is a significant advance because the annoying accumulation of contaminants practically no longer occurs. And if this accumulation should occur anyway, it can be easily removed.
Ein weiterer Vorteil ist die sichere und unschädliche Halterung der Membrane (3) in der T-förmigen Ausnehmung in der Grundplatte, bei welcher die bisherige Riffelung gänzlich wegfällt. Der Wegfall der Riffelung ist ferner mit Kosteneinsparungen verbunden. Während die Herstellung der Riffelung ein aufwendiger Arbeitsvorgang ist, ist das Fräsen der T-förmigen Ausnehmung sehr einfach und kostengünstig.Another advantage is the safe and harmless mounting of the membrane (3) in the T-shaped recess in the base plate, in which the previous corrugation is completely eliminated. The elimination of corrugation is also associated with cost savings. While the production of the corrugation is a complex process, the milling of the T-shaped recess is very simple and inexpensive.
Bei der vorliegenden Ausführung können die Profile 6 bis 8 entweder ringförmig sein oder aus zwei oder mehreren Teilen bestehen. In the present embodiment, the profiles 6 to 8 can either be ring-shaped or consist of two or more parts.

Claims

Patentansprüche claims
1. Belüfterplatte zum feinblasigen Belüften von Wasser, mit einer Grundplatte (2) und einer darüber angeordneten, gelochten Membrane (3), welche beide im Randbereich mittels einer Befestigungsvorrichtung (5) derart miteinander verbunden sind, dass die Membrane bei fehlender oder geringer Gaszufuhr auf der Gundplatte (2) aufliegt, wogegen sie bei Gaszufuhr sich von dieser abhebt, dadurch gekennzeichnet dass die Befestigungsvorrichtung (5) zwei Winkelprofile (6,7) und ein Stabprofil (8) einschlliesst, das die beiden Winkelprofile (6,7) in eine T-förmige Ausnehmung in der Grundplatte (2) einpresst, und dass die Profile (6-8) von einem Klemmprofil (10) in der eingedrückten Position gehalten sind.1. Aerator plate for fine-bubble aeration of water, with a base plate (2) and a perforated membrane (3) arranged above it, both of which are connected to one another in the edge area by means of a fastening device (5) in such a way that the membrane is open when there is no or little gas supply the base plate (2) rests, against which it stands out when the gas is supplied, characterized in that the fastening device (5) includes two angle profiles (6, 7) and a rod profile (8) which encloses the two angle profiles (6, 7) in one T-shaped recess pressed into the base plate (2) and that the profiles (6-8) are held in the pressed-in position by a clamping profile (10).
2. Belüfterplatte nach Anspruch 1 , dadurch gekennzeichnet dass das Klemmprofil (10) zur Halterung der Profile (6-8) in der richtigen Position mittels Schrauben mit Unterlagsscheiben in die Grundplatte (2) eingeschraubt ist.2. Aerator plate according to claim 1, characterized in that the clamping profile (10) for holding the profiles (6-8) in the correct position by means of screws with washers is screwed into the base plate (2).
3. Belüfterplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Membrane (3) mittels einer aufgeleimten Raupe (15) am Herausziehen gehindert ist.3. Aerator plate according to claim 1 or 2, characterized in that the membrane (3) is prevented from being pulled out by means of a glued-on bead (15).
4. Belüfterplatte nach Anspruch 2 oder 3, dadurch gekennzeichnet dass die Schrauben (11) durch die Membrane (3) geht, um sie zusätzlich zu halten.4. aerator plate according to claim 2 or 3, characterized in that the screws (11) passes through the membrane (3) to hold them additionally.
5. Belüfterplatte nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Stabprofil (8) am unteren Ende leicht zugespitzt ist, damit es das Einführen zwischen den beiden Winkelprofilen (6,7) erleichtert.5. aerator plate according to one of claims 1 to 4, characterized in that the rod profile (8) is slightly tapered at the lower end so that it facilitates insertion between the two angle profiles (6,7).
6. Belüfterplatte nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Profile (6 ,7, 8, 10) ringförmig ausgebildet sind, damit ein ununterbrochener Druck längs des gesamten Umfanges entsteht.6. aerator plate according to one of claims 1 to 5, characterized in that the profiles (6, 7, 8, 10) are annular, so that an uninterrupted pressure arises along the entire circumference.
7. Belüfterplatte nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet dass zur Niederhaltung der Membrane (3) gegen die Grundplatte (2) Rohre (24) eingesetzt sind.7. aerator plate according to one of claims 1 to 6, characterized in that to hold down the membrane (3) against the base plate (2) tubes (24) are used.
8. Belüfterplatte nach Anspruch 7, dadurch gekennzeichnet dass die Rohre (24) und die Querstäbe (23) nur eingelegt sind und der auf sie lastende Druck von den Längsträgern (21) aufgenommen ist. 8. aerator plate according to claim 7, characterized in that the tubes (24) and the cross bars (23) are only inserted and the pressure on them from the side members (21) is absorbed.
PCT/CH2002/000398 2001-07-21 2002-07-19 Aerator plate for water aeration WO2003011442A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01356/01A CH695187A5 (en) 2001-07-21 2001-07-21 Belufterplatte to Wasserbeluftung.
CH1356/01 2001-07-21

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EP1545753B1 (en) * 2002-08-13 2009-08-12 Itt Manufacturing Enterprises, Inc. Membrane strip diffuser for wastewater treatment
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