DE102007033483A1 - aerators - Google Patents

Abstract

Submersible aerator, comprising at least one aerating device (1) arranged on a support (3, 43), which is characterized in that the submersible aerator comprises at least one floodable hollow body (2, 42), the support (3, 43) being a floatable hollow body ( 2, 42) is formed.

Description

The The present invention relates to a submersible aerator with at least one ventilation device arranged on a carrier.

From the DE 196 21 116 C2 (Invent) is a floor distributor for gas, to which at least one elastic perforated hose can be connected and acted upon with the gas, known with a hollow body, which communicates with a ventilation device. This hollow body is provided as a floor distributor for the supply of the ventilation device. In order to hold and operate such a device when used in water purification plants near the ground, appropriate weights must be provided in order to compensate for the buoyancy caused by the cavities of the floor distributor.

From the DE 40 01 201 C1 (Nordenskjöld) is a Schwimmbelüfter for the introduction of air into a body of water, which supplies via connecting lines so-called Tauchbelüfter used aerators with air for the ventilation of a body of water.

aerators have a limited lifespan and are beyond regularly at certain cleaning intervals to clean, or to check. To do this the floor aerators, usually during operation a cleaning or treatment plant to be taken out of the tank. As the floor aerators compensate for buoyancy during operation These are regular weights complained. Retrieving a floor aerator is one difficult matter. A Bodenbelüfter is for example from an activated sludge tank of a sewage treatment plant to bring to the water surface, to treat there (cleaning, Inspection, possibly repair) and then lower again. This action is extremely time-consuming and cost-intensive and also for the executing persons dangerous. Besides be the relevant parts of the Schwimmbelüfter or Floor aerator or submersible aerator heavily loaded and claimed. Especially with aerators equipped with membranes Damage to the sensitive membranes is not to avoid.

From the US 5,906,774 (Parkson) is a Schwimmbelüfter with a connected via a rod Tauchbelüfter known, in the area of the Tauchbelüfters of which separate additional so-called inflatable buoyancy bodies are arranged, which should help alleviate the problem just described when raising a Tauchbelüfters. The device functions to inflate additionally arranged buoyancy bodies to bring up the submersible aerators and help bring the submersible aerator to the water surface. This greatly facilitates the handling of the submersible aerators in service. A very particular drawback, however, is associated with this device in that the inflatable buoyancy bodies constitute additional components arranged in the environment of the submersible aerator, which are vulnerable to injury beyond their uninflated shape, as in the inflated state, and if perforated by any objects become completely out of order and unable to fulfill their function.

At the Operation of sewage treatment plants becomes Schwimmbelüfter, these are swimmers, in which in the water of the sewage treatment plant Attach immersed submersible aerator for blowing in used by air or gases in the water. Especially in sewage treatment plants Such facilities are used to aerate activated sludge basins used. Another use is for oxygenation of waters. In the manner known in principle Here is operated a pressure ventilation system in which atmospheric air sucked in by compressors and over a distribution line system to the so-called submersible aerators distributed, whose property is usually the blown Add air in fine bubbles, which from the Tauchbelüfter aspire to the water surface and oxygen on their way deliver to the water. In anaerobic processes are mentioned Devices also as gas injection according to the same principle, used in particular for circulation. Across from attached to the pelvic floor in classical sewage treatment plants Aerator elements, has a floating ventilation special advantages. Because of this, the floating ventilation has become in the recent past very strong enforced.

With the increase in the size of individual plants is increasing also the number of aerator elements per system. One speaks here very fast of several thousand aerator elements within a plant. Devices are known in which individual so-called aerator candles to aerators be summarized and over interconnectors, for example Hose or piping on a floating air distribution pipe attached and operated under water near the ground become. As aerator candles are so-called pipe aerators made of polyester or ceramic and perforated membrane materials known which are usually mounted on support body are. Aerators with perforated membranes have become in enforced in the market in recent years, as opposed to them all other aerator materials the highest Allow oxygen utilization. Furthermore come so-called plate or plate fans for use.

The Increased plant sizes require ever larger Single basins and ever greater water depths, today up to six meters. For reasons of economy will be therefore more and more aerator candles in a ventilation device summarized. An essential feature of a functional "floating" Tauchbelüfters, or a floating Ventilation is that used underwater Components work stably at operating height during operation and do not have too high a buoyancy, leading to a swim and thus the inoperability of the submersible aerator would lead. For example, is the buoyancy too high, so the ventilators come in normal operation in an unstable situation, which can cause them partially floating, interlocking each other and the effective Endangering the operation of an entire aeration device, or even bring it to a standstill. Furthermore is easy to understand that in such a situation the devices that perform uncontrolled movements, damage each other. The optimally constructed Submersible aerator just has so much weight that on the one hand the resulting force this in operation in a stable position holds. On the other hand, the dead weight should still in one Magnitude, which is a handling for the assembly and operating personnel allows.

The ventilators described are due to their Use exposed to a special wear. you are to clean at certain intervals or after a limited period Lifespan of the membrane are to be replaced. You have to the ventilation equipment, or the submersible aerators, on which they sit, out of the water to the water surface bring. This usually happens at full operation of the system, because the system can not be switched off. The taking out of Aerating the water is a costly, difficult process and hurtful matter. Usually are this requires several people. A special difficulty results from the fact that all submerged surfaces very slippery due to a slime-like "biological" growth are. This complicates the handling of the Schwimmbelüfter additionally. In addition, the aerators and the Ancillary devices frequently pulled out during extraction that material damage such as kinking of hoses, Breakage of hose connections and damage the aerator membrane can result. A special adverse consequence can be caused by too long handling of a single Schwimmbelüfters, or dive aerators, namely by that otherwise worked by this Tauchbelüfter Water zone with activated sludge added, with the risk that this Activated sludge is damaged and thereby the entire biological Process is affected.

It it is an object of the invention to propose a submersible aerator avoided with the known from the prior art disadvantages or at least greatly reduced.

The Task is solved with a submersible aerator at least one aeration device arranged on a carrier, wherein the submersible aerator is characterized in that he has at least one floodable hollow body, wherein the carrier is designed as floatable hollow body is. The device according to the invention offers a Set of advantages. The trained as floodable hollow body Support for the ventilation device helps decisively, the buoyancy of the Tauchbelüfters when it is filled with water during operation. As a result, it is sometimes possible additional Weights for the Tauchbelüfter, which the buoyancy compensate for it so that it works equally well in its working height hovering, letting go, or minimizing, so its dead weight the submersible does not get too big.

In An advantageous embodiment of the invention is the floatable hollow body designed as an elongated tube. This gives the advantage that inexpensive standard parts for the production of the invention Submersible aerators can be used.

A advantageous embodiment of the invention is also that of designed as floodable hollow body carrier of Dive aerators as rectangular, round or elliptical Pipe is formed. This can be advantageously an individual adaptation of the Tauchbelüfters preferred Reach ventilation facilities.

In An advantageous embodiment of the invention is the floatable hollow body with a compressed air supply for filling the hollow body equipped with gas or air. With this device can be the device according to the invention particularly simple bring to the surface of the water. The flooded hollow body is supplied for this purpose with compressed air and the therein Water removed, due to the now no longer flooded hollow body to cause the appearance of the submersible aerator. The compressed air supply alternatively, from a compressed air source on a maintenance boat, from a specially furnished supply in the plant or via appropriate use of the for ventilation the air used in the water.

In an advantageous embodiment of the invention, the carrier of the Tauchbelüfters invention is at least partially with one, this order closing perforated, membrane and a gas supply of gas between the support and the membrane equipped. Hereby advantageously already known from the prior art ventilation devices, in particular combined with the present invention realize much easier. Trained as an elongated tube carrier forms with its outer wall as it were a wall of the air duct of the ventilation device, the other wall by a porous membrane, which is opposite to the carrier, apart from the pores, sealed gas-tight.

In an advantageous embodiment of the invention, the Hollow body of the Tauchbelüfters at least one in an end portion of the hollow body arranged end part with a first channel for supplying the ventilation device and with a second channel for supplying compressed air for filling the Hollow body with gas or air. This embodiment allows the device according to the invention a low-part and easy-to-assemble construction. This brings enormous cost advantages and also time advantages during assembly as well with the service of the Tauchbelüfters with itself.

In An advantageous embodiment of the invention is the first channel the end part provided with check valves, which a Liquid flow, such as the flow of the waste water through the first channel, out of the hollow body prevent it from happening. Thus, the security is in such an advantageous manner increased that in the air supply to the aeration device can not get any unwanted materials.

In an advantageous embodiment of the invention is the Tauchbelüfter characterized by an additional weight. This allows an individual Adaptation of the device according to the invention the respectively required conditions or boundary conditions, which from the sewage and also from the respective application situation of the submersible aerator out.

In an advantageous embodiment of the invention is the Tauchbelüfter by a hollow cylinder designed as a flat cylinder characterized in the cylinder peripheral wall surface star-shaped arranged, outwardly projecting ventilation devices, for example in the form of aerator candles and the like are arranged. This training according to the invention of the submersible aerator allows the use of the inventive principle, even in figurative differently designed dive aerators, especially those which are used decentralized as a single aerator.

In an advantageous embodiment of the invention Dive aerator is this one as a flat cylinder trained hollow body, at the cylinder roof surface Ventilation devices are attached. Here is how in the embodiment described above an individual Adaptation of the device according to the invention predetermined, possibly already existing systems possible, but here are the outstanding advantages the device according to the invention, namely the trouble-free lifting out of a dive aerator especially come to fruition.

In An advantageous embodiment of the invention is a submersible aerator characterized in that the floodable hollow body as elongated tube is formed on the outer wall Essentially perpendicular to this wegerstreckende ventilation devices are attached. Here is also the beneficial effect the two examples described above, namely the adaptation and Integration of the device according to the invention or in existing systems, or the combination of the invention Device with possibly other advantages of the described Arrangement variants, hollow bodies and ventilation devices.

Further Features and advantages of the invention are the subclaims refer to.

To the A better understanding of the invention will be hereafter with the aid of a drawing using a few examples described.

1 shows a highly schematic embodiment of a Tauchbelüfters invention in partial section.

2 shows the submersible aerator 1 in perspective view.

3 shows a further embodiment of a Tauchbelüfters highly schematic in perspective view.

4 shows in a perspective view also very schematically a further example of a Tauchbelüfters invention.

5 shows in a schematic exemplary representation of the submersible aerator 4 in a sectional view.

6 shows a further embodiment of a Tauchbelüfters invention.

7 shows a further embodiment of a Tauchbelüfters invention.

1 shows very schematically a dive aerators 4 with a carrier 3 at which a ventilation device 1 is appropriate. The carrier 3 is as floodable hollow body 2 formed, for a better understanding of the cavity 10 flooded hollow body 2 this is illustrated here and in the further course of this description rautiert. Via a gas supply 6 For example, air is conveyed in the direction of arrow L in the Tauchbelüfter and the carrier 3 the ventilation device 1 fed. In the area of the ventilation device 1 Symbolically indicated arrows B are intended to clear the way out of the aeration device 1 indicate air bubbles rising to the water surface. The floodable hollow body 2 trained porters 3 is like in the 1 and 2 shown here as an elongated cuboid. The rautiert hatched area in the hollow body 2 can be filled with liquid or flooded during operation of the submersible aerator. This reduces the buoyancy of the Tauchbelüfters invention to the extent that the flooding of the hollow body 2 is made. The aim is a stable position, preferably in the vicinity of the bottom shown schematically 7 ,

3 shows a further embodiment of the invention. Here is a carrier 13 to recognize which with a flat-cylindrical hollow body as floodable hollow body 12 is integrated. At a traverse 18 , which like in 3 is shown on the carrier 13 is air-carrying, are ventilation devices 11 with schematically illustrated commercial aerator candles 15 fitted. The particular advantage of this arrangement is that a floodable hollow body 12 for a whole battery of aerator candles 15 serves. In principle, the air flow in the ventilation equipment 11 analogous to the gas supply according to the embodiment of the 1 and 2 thought. So are the aeration devices 11 each again via a gas supply 16 supplied in the direction of the arrow L with air, which in the direction of arrows B from the ventilation device 11 emerging air bubbles, or their way to symbolize the water surface.

4 shows a further embodiment of a Tauchbelüfters 24 which is a central carrier 23 , or central hollow body 22 has, at the star-shaped ventilation devices 21 are arranged. Via a gas supply line 26 become the aeration devices 21 supplied in star shape with aeration gas. For a better understanding of this in 4 perspective indicated embodiment of the invention is in 5 a schematic sectional view of the Tauchbelüfters according to 4 shown. About the gas supply 26 air flows through an air duct 29 into the ventilation device 21 to get back to the water surface in the direction of arrows B.

6 shows a further embodiment of the invention in the form of a star-shaped Tauchbelüfters 36 , In principle, the function of the individual components is analogous to the examples described above from the 3 and 4 understand. Also is the to 3 mentioned special advantage of this construction in the form of a variety of aeration devices combined with a single floatable hollow body 32 to recognize.

7 shows a further embodiment of a Tauchbelüfters invention 44 with a carrier 43 , which at the same time the function of a floodable hollow body 42 Has. A gas supply 46 opens via an unspecified coupling here in an end part 401 which the in 7 left side of the submersible aerator 41 in the interior of the carrier 43 which also includes the hollow body 42 forms, tightly closes. The end part 401 has a gas supply channel 49 over which air through holes 402 in the carrier 43 between the outer wall 413 of the carrier 43 and one the outer wall 413 surrounding membrane 403 is passed through which the air passes through pores 404 escape and in the direction of arrows B can get up to the water surface. Ring 405 fasten by clamping the membrane 403 on the outer jacket of the exemplary cylindrical carrier 43 , or hollow body 42 , Internally 410 of the hollow body 42 the floodable area is shown hatched with a hatch. A compressed air supply 406 also ends in the end part 401 into a canal 409 over which the cavity 410 of the hollow body 42 can be filled with compressed air. Which is in the cavity 410 liquid is through a channel 411 , which is on the right side of the in 7 illustrated Tauchbelüfters 41 in an end part 412 is arranged, expelled. Passing mm according to the arrow DL on the channel 406 as well as the channel 409 in the end part 401 Compressed air in the interior 410 of the submersible aerator 41 , so will be in the room 410 liquid through a channel 411 expelled and the cavity 410 evacuated. This increases the buoyancy of the submersible aerator 41 such that it rises to the water surface.

by virtue of the construction of the Tauchbelüfters invention this can be done by "inflating" or emptying the floodable Bring hollow body to the water surface with compressed air and wait. After completion of the maintenance, the submersible aerator becomes put back into the water, and the hollow body flooded by itself: The diving fan sinks back into its operating position from.

Schematically is in 7 still the pelvic floor 47 indicated, in the vicinity of the site of the Tauchbelüfters 41 is provided during operation. Depending on the thickness 414 and the weight of the wall of the hollow body 42 , or the material of the hollow body 42 and the volume of the cavity 410 can be the desired buoyancy of the immersion body 41 to adjust.

To simplify the presentation is extremely oversubscribed on the bottom of the submersible aerator 41 the position of the membrane 403 ' "in the aeration mode", which occurs when the compressed air supply with pressurized air in this situation due to the between the outer surface 413 of the hollow body 42 and the membrane 403 adjusting overpressure. The pores 404 the elastic membrane 403 open and release arrows of air B from the submersible aerator 41 ,

At the gas supply channels 409 and 49 of the end part 401 can optionally check valves 407 and or 408 be attached to a backflow of liquid from the cavity 410 into the channels 409 , respectively. 49 and thus also contamination of the corresponding air ducts 406 and 46 to prevent.

8th shows essential features of the submersible aerator 41 to 7 in perspective view.

Of course, the principle according to the invention can also be used in the form of plate fans, which correspond to the detail of the embodiment according to 7 explained design features are realized. The possibility of using the principle of the Tauchbelüfters invention allows countless variations. It is to be understood that the invention and scope of the claims associated with this description are not limited to the embodiments shown herein by way of example.

1, 11, 21, 31

aerator

2, 12, 22, 32, 42

floodable hollow body

3, 13, 23, 33

carrier

4, 14, 24, 34, 41, 44

aerators

5, 15, 25, 35

aerator or membrane aerator

6 16, 26, 36, 46

gas supply

7, 47

ground

9 29

air duct

10

cavity

18

traverse

401

end

402

channel

403 403 '

membrane

404

pore

405

clamp

406

Compressed air supply

407

check valve

408

check valve

409

channel

410

cavity

411

second channel

412

end

413

cylindrical outer wall

414

wall thickness

B

arrow Bubble moving direction

L

arrow Air supply direction

DL

arrow Compressed air supply direction

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19621116 C2 [0002]
• - DE 4001201 C1 [0003]
• - US 5906774 [0005]

Claims (11)

Submersible aerator, with at least one on a support ( 3 . 43 ) arranged ventilation device ( 1 ), characterized in that the submersible aerator at least one floodable hollow body ( 2 . 42 ), wherein the carrier ( 3 . 43 ) as floodable hollow body ( 2 . 42 ) is trained. Submersible aerator according to claim 1, characterized in that the floatable hollow body ( 2 . 42 ) is designed as an elongated tube. Submersible aerator according to claim 2, characterized in that the floodable hollow body ( 2 ) is formed as a rectangular, round or elliptical tube. Submersible aerator according to one of the preceding claims, characterized in that the floodable hollow body ( 2 ) with a compressed air supply for filling the hollow body ( 2 ) is equipped with gas or air. Submersible aerator according to one of the preceding claims, characterized by a support ( 3 . 43 ) at least partially enclosing perforated membrane ( 403 ) and a gas supply ( 402 ) for supplying gas between carriers ( 42 ) and membrane ( 403 ). Submersible aerator according to claim 5, characterized in that at least one in an end region of the hollow body ( 2 ) arranged end part ( 401 ) a first channel ( 49 ) Supply the ventilation device ( 1 ) and a second channel ( 409 ) to the compressed air supply for filling the hollow body ( 2 . 42 ) with gas or air. Submersible aerator according to claim 6, characterized in that the first channel ( 49 ) and / or the second channel ( 409 ) with non-return valves ( 407 . 408 ), which permits liquid flow through the first or second channel ( 409 ) from the hollow body ( 2 ). Submersible aerator after one of the previous ones Claims, characterized by an additional weight. Submersible aerator according to one of the preceding claims, characterized by a hollow cylinder designed as a flat cylinder ( 2 ), on whose Zylinderumfangswandfläche arranged in a star shape outwardly projecting ventilation devices ( 21 . 31 ) are mounted. Submersible aerator according to one of Claims 1 to 8, characterized by a hollow body designed as a flat cylinder ( 2 ), are mounted on the cylinder roof surface ventilation devices. Submersible aerator according to one of claims 2 to 8, characterized in that the floodable hollow body is formed as an elongated tube, on its outer wall, substantially perpendicular thereto extending away therefrom ventilation devices ( 11 ) are mounted.