WO1990005707A1 - Appareil d'aeration de bassins a liquides et procede correspondant - Google Patents

Appareil d'aeration de bassins a liquides et procede correspondant Download PDF

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Publication number
WO1990005707A1
WO1990005707A1 PCT/CH1989/000206 CH8900206W WO9005707A1 WO 1990005707 A1 WO1990005707 A1 WO 1990005707A1 CH 8900206 W CH8900206 W CH 8900206W WO 9005707 A1 WO9005707 A1 WO 9005707A1
Authority
WO
WIPO (PCT)
Prior art keywords
ventilation
rails
liquid
units
liquid pool
Prior art date
Application number
PCT/CH1989/000206
Other languages
German (de)
English (en)
Inventor
Roger Fux
Original Assignee
Roger Fux
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 Roger Fux filed Critical Roger Fux
Publication of WO1990005707A1 publication Critical patent/WO1990005707A1/fr

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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
    • 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
    • C02F3/203—Swing diffusers
    • 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 a method for operating an aeration device for introducing fine-bubble gas into a liquid basin to maintain a continuous process running therein, wherein ventilation units are arranged for areal aeration of the liquid, and a device for carrying out the method.
  • ventilation is used here for the sake of simplicity for the entry of various media, eg. B. Gases, liquids and the like used.
  • media eg. B. Gases, liquids and the like used.
  • the introduction of media into a liquid plays an important role in chemical engineering.
  • the introduction of air or oxygen into waste water has become particularly important, which process is used in many sewage treatment plants for the treatment and purification of domestic and industrial waste water.
  • oxygenation in the liquid different solutions are examples of oxygen in the liquid.
  • the suitability of the various entry systems in sewage treatment plants depends on the one hand on the energy consumption per kilogram of oxygen entered in the liquid and on the other hand on the Operational reliability, ie insensitivity to clogging of the air or oxygen inlet openings.
  • the surface aerators may be mentioned, in which rotating units arranged in the region of the surface of the liquid pool, e.g. B. Rotors, turbines or gyros are used.
  • Ventilation devices in which air or another medium via pipelines with subsequent slotted, perforated or porous ventilation pipes are known in various designs.
  • the ventilation pipes may be pivoted above the liquid level for maintenance thereof. Since they cannot be used for large immersion depths, their use is restricted to smaller systems.
  • Another known device for introducing air or oxygen are air distributors which are equipped with an air distributor film which are provided with a large number of air outlet openings by means of which fine-bubble aeration of the liquid to be cleaned is achieved, see EP Patent 28728 and EP patent application 171452.
  • These air distributors are mounted on the bottom of the liquid pool and connected to a pressure source, from which the necessary amounts of air or oxygen are supplied to the air distributor foils.
  • a pipeline system is installed at the bottom of the liquid basin, in which ventilation domes are arranged at certain intervals on the apex of the pipelines.
  • the domes are closed by cover plates made of ceramic-plastic material, in which air outlet openings are arranged in large numbers.
  • the two last-mentioned known aeration devices are used in large numbers in different sewage treatment plants and achieve a fine-bubble aeration of the liquid with relatively little energy expenditure, for. B. 2--kg of oxygen per kilowatt hour.
  • Ventilation units to achieve any Ventilation distribution in the liquid pool can be designed and moved, moved, positioned and replaced without having to interrupt the process in the liquid pool.
  • the invention also includes a device with which the object is achieved to enable the method according to the invention in an optimal manner.
  • This object is achieved according to the invention in that the ventilation system is composed of ventilation units which are connected to one another in rows and can be moved and positioned in the rails, the rails extending in one direction over the liquid basin and on a wall of the liquid basin as far as the Liquid level of the same are guided.
  • Fig. 1 shows a schematic, spatial representation of a device for the continuous introduction of gaseous substances into a liquid basin with a row-shaped arrangement of ventilation units at the bottom of the liquid basin as well as the maintenance position of this row of units outside the level of the liquid basin,
  • Fig. 2 shows a partial section of a liquid basin with aeration units arranged therein
  • Fig. 3 shows a top view of the device according to FIG. 1 or 2 .
  • Fig. 4 is an enlarged view of the connection of ventilation units
  • Fig. 5 shows a view from the direction V in FIG. 4
  • Fig. 6 is a side view, partly in section from the direction VI in FIG. 4 and
  • Fig. 7 a section along the line VI! VI in FIG. 3, the left half of the figure showing a ventilation unit with a gas distributor plate and the right side of the figure showing a ventilation unit with a dome aerator.
  • the device 1 shown in FIG. 1 for ventilating a liquid basin 2 has a flat bottom 3 and vertical side walls 4.
  • the shape of the liquid keitsbeckens 2 can also be chosen differently; inclined floor and wall parts can be used.
  • Ventilation units 5 are arranged in a row above the floor 3, next to which one or more rows of such units can be arranged depending on the size of the liquid pool 2.
  • the rows can be arranged adjacent to one another or at a distance from one another.
  • the ventilation units 5 are via supply lines (not shown), for. B. Hoses, with gas, e.g. B. Air or oxygen.
  • this row of ventilation units 5 is shown outside the liquid pool 2.
  • the units 5 are guided in two rails 6 and transported from the liquid basin 2 to the maintenance position 8 with the aid of a chain drive 7.
  • the rails 6 extend beyond the liquid level 9 of the liquid basin 2 and are designed such that they can be connected to rails 6 'of a maintenance device 10, into which the units 5 can be moved into the maintenance position 8.
  • the necessary maintenance work can be carried out there, for example inspecting their condition and cleaning them, but also replacing entire units. are the maintenance work is completed, the row of these units 5 is moved back into the operating position with the aid of the chain drive 7, which can be manually operated, for example, by a wall winch 11. It is important here that the rows next to it remain in operation and thus the process taking place in the liquid pool - e.g. B. for a biological treatment of waste water, does not have to be interrupted. ⁇
  • the rail 6 is shown, which extends over the bottom 3 of the liquid basin 2 and on a side wall 4 to above the liquid level 9, the ventilation units 5 being connected to one another by couplings 12.
  • the rails 6 1 of the maintenance device 10 can then be inserted at the upper end 13 of the rails 6.
  • the rails 6 can also be arranged at different heights of the basin 2.
  • part of the chain drive 7 is also arranged in the liquid pool 2.
  • a deflection roller 15 is arranged on the bottom 3 of the liquid pool 2, around which the chain 16 of the chain drive 7 is guided.
  • the two ends of the chain 16 are held in a clamping device 17 and can be connected to the chain 16 ′ of the maintenance device 10.
  • the chain 16 is connected to the ventilation units 5 via a pivotable drawbar 14.
  • FIG. 3 It can be seen from FIG. 3 that the ventilation units 5 are connected to one another in an articulated manner by means of brackets 18, 19, as will be explained in detail with reference to FIG. 4.
  • brackets 18, 19, As will be explained in detail with reference to FIG. 4.
  • ventilation units 5 of adjacent rows are partially shown.
  • FIG. 4 shows the tabs 18, 19 connecting the ventilation units 5 to one another. You are going through a
  • the cardan shaft 20 is connected to one another in an articulated manner, the cardan shaft 20 also carrying a guide element 22, for example a guide roller or a guide body 23 designed as a sliding body, see FIG. 6.
  • the guide element 22 has a guide disk 24 for lateral guidance in the rail 6.
  • the rails 6 are designed as a U-profile, in the open side of which the guide elements 22 protrude. Instead of a U-profile, a T-profile can also be used as the rail 6.
  • the guide body 23 is then in two parts and encompasses the T-profile from above and below.
  • the rails 6 are supported on the floor 3 and on the side wall 4 by means of supports 25.
  • the supports 25 are designed as threaded bolts on which two nuts 26 are unscrewed, between which the rail profiles 6 are clamped with the aid of washers 27.
  • the supports 25 are in mounting rails 28, e.g. Dovetail profiles attached, which are embedded in the bottom 3 and in the side walls 4. This simplifies the laying of the rails 6. It would of course also be possible to anchor the supports directly in the floor 3 and in the side walls 4. It should be noted here when fastening the rails 6 that the anchoring of the fastening rails 28 or the anchoring of the supports 25 must withstand the considerable stresses arising from the buoyancy of the ventilation units 5.
  • the fastening rails 28 are particularly suitable for this purpose, which also facilitate the laying of the rails 6.
  • a ventilation unit 5 is shown in section in FIG. It consists of a support body 5 ′ designed as a hollow profile 21, the side 29 directed towards the bottom 3 of which is designed as a fixed wall, to which side walls 30 adjoin, which end in a groove 31 directed towards one another.
  • the bottom side Wall 29 can be stiffened by ribs 32.
  • the ventilation unit 5 can also be made narrower, as shown by two dash-dotted lines parallel to the wall 29. The resulting buoyancy forces must be taken into account when dimensioning.
  • a ventilation element 5 ′′ formed as a gas distributor plate 33 is inserted into the opposing tauts 31 of the supporting body 5 ′, which is stiffened by a support plate 34 underneath.
  • the gas distributor plate 33 and the support plate 34 are by means of of an inside and an outside sealing strip 35, 36. This ensures that in the maintenance position 8 the gas distributor plates 33, together with the support plate 34 and the seals 35, 36, are pulled out of the supporting body 5 'like a drawer, cleaned or cleaned by a new ventilation element 5 "can be replaced.
  • dome aerators 37 are used, a plate-shaped carrier element 40, see the right side of FIG. 7, is inserted into the grooves 31 and sealed by the seals 35, 36.
  • the dome aerators 37 are fastened on the support element 40 in a single row or distributed over several rows.
  • the dome aerators 37 can also be easily checked, cleaned or replaced in the maintenance position 8.
  • the transfer of the gassing elements 5 into the maintenance position 8 facilitates the maintenance of the gassing elements 5 without the process carried out in the liquid pool 2 having to be interrupted.
  • the ventilation units 5 are designed so that the ventilation part, i.e. H . the gas distributor plate 33 or the dome aerator 37, easily can be replaced without the entire ventilation unit 5 having to be replaced.
  • the ventilation units 5 can expediently from light metal l, z. B. Aluminum, or made of plastic, so that considerable weight savings are possible.
  • the maintenance device 10 only needs to be purchased once. It can be attached to each upper end 13 of the rails 6, so that all rows of ventilation units 5 can be serviced. It is not necessary here for the maintenance device 10 to extend horizontally. If a plurality of liquid pools 2 are arranged next to one another and the space in between is not sufficient for a horizontal arrangement of the maintenance device 10, this can also be arranged obliquely or vertically without this making maintenance more difficult. Another advantage is that the device can be used not only in new systems, but also in existing systems. Special advantages are achieved in existing plants, which tend to clog due to the composition of the wastewater. In such systems, the replacement of the old ventilation device with the ventilation device described brings a substantial saving in energy and cleaning effort.
  • the ventilation device described also enables the ventilation distribution to be optimally adapted to the prevailing conditions.
  • the rows of ventilation units can be varied in that the ventilation units 5 are at different distances, e.g. B. be arranged by different lengths of tabs 18, 19, intermediate tabs or by using blind elements or by completely or partially omitting individual ventilation elements.
  • the ventilation along the direction of the rails 6 can be optimally achieved horizontally and vertically Adjust operating conditions.
  • an adjustment in the direction perpendicular to the horizontal direction is also possible in that the ventilation elements 5 "of the ventilation units 5 extending perpendicular to the direction of movement can also be changed as desired in their ventilation distribution.
  • the ventilation elements 5" can be easily removed from the support body 5 'urTd can be replaced by another element with a different distribution of the ventilation openings. This great mobility in adapting the ventilation device to the respective conditions enables optimal ventilation of the liquid pool 2 with the least energy expenditure.
  • the rails 6 and thus the rows of ventilation units 5 can be arranged at a distance above one another, which can be used, for example, in large liquid pools of great depth.
  • the use of the aeration device is not limited to liquid pools.
  • the device can also be used, for example, in ponds and lakes, the ventilation units having to be provided with an appropriate balancing weight.
  • the ventilation units 5 can be made of light metal or plastic. In the latter case, substantial weight savings are achieved, which favors the installation of such systems and also the export of the same.

Landscapes

  • 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)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

Des unités d'aération (5) sont agencées par rangées sur des rails (6) à l'intérieur d'un bassin à liquides (2) et sont conduites vers une position d'entretien (8), où elles sont contrôlées, nettoyées et, le cas échéant, remplacées. A cet effet, les rails (6) se prolongent jusqu'en dessus du niveau (9) du liquide dans le bassin (2), les rails (6') pouvant en leurs extrémités supérieures (13) être joints à un dispositif d'entretien (10). Un entraînement par chaîne (7) sert alors à mener la rangée correspondante d'unités d'aération (5) vers la position d'entretien (8) puis à la ramener vers la position opérationnelle. Comme l'entretien des unités d'aération (5) se fait rangée par rangée, il n'est pas nécessaire d'interrompre le processus en cours dans le bassin (2). Le fait que les unités d'aération (5) soient mobiles permet d'adapter la répartition de l'aération aux conditions de fonctionnement.
PCT/CH1989/000206 1988-11-24 1989-11-21 Appareil d'aeration de bassins a liquides et procede correspondant WO1990005707A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4386/88-8 1988-11-24
CH4386/88A CH680195A5 (fr) 1988-11-24 1988-11-24

Publications (1)

Publication Number Publication Date
WO1990005707A1 true WO1990005707A1 (fr) 1990-05-31

Family

ID=4275152

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1989/000206 WO1990005707A1 (fr) 1988-11-24 1989-11-21 Appareil d'aeration de bassins a liquides et procede correspondant

Country Status (2)

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CH (1) CH680195A5 (fr)
WO (1) WO1990005707A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006576A1 (de) * 2009-01-29 2010-08-05 Nordenskjöld, Reinhart von, Dr.-Ing. Belüfter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150609A1 (de) * 1981-12-21 1983-07-14 Didier-Werke Ag, 6200 Wiesbaden Einrichtung zum ausheben von beluefterbloecken aus einem klaerbecken
DE3332074A1 (de) * 1983-09-06 1985-05-15 Schreiber, Berthold, Dipl.-Ing., 3000 Hannover Schwimmbeluefter fuer abwasserteiche

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150609A1 (de) * 1981-12-21 1983-07-14 Didier-Werke Ag, 6200 Wiesbaden Einrichtung zum ausheben von beluefterbloecken aus einem klaerbecken
DE3332074A1 (de) * 1983-09-06 1985-05-15 Schreiber, Berthold, Dipl.-Ing., 3000 Hannover Schwimmbeluefter fuer abwasserteiche

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009006576A1 (de) * 2009-01-29 2010-08-05 Nordenskjöld, Reinhart von, Dr.-Ing. Belüfter

Also Published As

Publication number Publication date
CH680195A5 (fr) 1992-07-15

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