DE102018129749B3 - Ventilation system for aerating a liquid, in particular waste water, and liquid container - Google Patents

Abstract

The invention relates to a ventilation system (3) for venting a liquid (2) in a liquid container (1), with a perforated ventilation hose (4) for the discharge of air bubbles into the liquid (2), wherein the ventilation hose (4) via at least one connecting element in at least one guide element (5) is received, wherein the guide element (5) for attachment to a bottom (1 a) and / or a wall (1 b) of the liquid container (1) is suitable, so that the ventilation hose (4) on the ground ( 1a) and / or the wall (1b) of the liquid container (1). According to the invention, the at least one connecting element is accommodated in the at least one guide element (5) such that the ventilation tube (4) is in or against one can be moved by the course of the at least one guide element (5) defined guide direction (A) and a movement in the other directions is prevented is t, wherein the ventilation hose (4) is further connected in such a way with at least one traction means (6), that the ventilation hose (4) by a pulling force (F) on a pull point (8a, 8b) on the at least one traction means (6) or against the guide direction (A) can be moved.

Description

The invention relates to a ventilation system for aerating a liquid, in particular wastewater, according to the preamble of claim 1. The invention further relates to a liquid container with such a ventilation system.

Ventilation systems of this type are used to store in liquid containers, e.g. Clarifier or aeration tank to supply the wastewater contained therein with oxygen, so that there required degradation processes can occur, etc. For this purpose, air is e.g. Pressed through a compressor in ventilation hoses, which run within the wastewater below the surface. The ventilation hoses have a certain leakage rate, which ensures that, with sufficient pressure in the ventilation hoses, a desired amount of air escapes from the ventilation hose into the wastewater.

The ventilation hoses are usually made of rubber or rubber compounds or suitable plastics. In order to achieve the desired leak rate, the ventilation hoses are at least partially perforated, so that at sufficient pressure in the ventilation hose air can escape into the liquid.

So that the air-filled ventilation hoses do not float due to their buoyancy in the liquid or wastewater on the surface and thus lose their gassing function for the lower liquid layers, the ventilation hoses are fixed to the bottom of the liquid container via a holder or a guide element. In addition, the ventilation hoses are anchored in sections or over their entire length on the ground, as in DE 101 049 854 A1 . DE 102 03 780 A1 . DE 10 2012 005 472 A1 or DE 37 31 998 A1 described by way of example. Instead of a bracket of the ventilation hose but also about firmly connected to the ventilation hose elements, such as a chain, weighted and thereby kept close to the ground, as in DE 10 2017 104 457 A1 specified.

A disadvantage of such types of fastening the ventilation hoses that repair or maintenance or cleaning this is very expensive, since the ventilation hoses can not be removed without much effort from the liquid container and then positioned again in this. Cleaning may be e.g. be necessary if the perforation is at least partially closed due to incrustations, calcification or constipation. Furthermore, maintenance or replacement of a ventilation hose due to embrittlement of the material may be necessary.

To raise and lower a sewage treatment system for cleaning or maintenance, see DE 39 04 104 C2 a lifting device for surface ventilation systems shown. It is envisaged that the liquid container, a frame is attached, which has a rail on or in which a holder is movably arranged. The bracket is connected to the surface ventilation system so that it can be operated and lowered via a winch.

Also DE 10 2005 019 011 A1 shows a lifting device for ventilation systems, wherein it is provided to store a boom part slidably mounted on a guide on the liquid container. The area ventilation system is attached to the boom part, so that it can be raised and lowered during a displacement along the guide in the liquid container.

A disadvantage of these solutions is that the lifting devices are very complex and even to be maintained. In addition, these are only conditionally suitable for the aeration hoses described above as area ventilation system in the liquid container.

EP 0 559 857 B1 shows a further ventilation system for aerating a liquid with a perforated ventilation hose, wherein the ventilation hose is received via a plurality of connecting elements designed as brackets in at least one guide element (guide rail). The guide element is suitable for attachment to a bottom and / or a wall of the liquid container, so that the ventilation hose accommodated in the at least one guide element can be held on the bottom and / or the wall of the liquid container. The at least one connecting element is accommodated in the at least one guide element in such a manner that the ventilation hose can be displaced in or against a guide direction defined by the path of the at least one guide element via a traction means cooperating with the holders and movement in the other directions is prevented.

Object of the present invention is therefore to provide a simple and reliable mounting option for ventilation hoses for Flüssigkeitsegegasung in a liquid container with which a simple maintenance and cleaning and repair of the ventilation hoses can be ensured.

This object is achieved by a ventilation system according to claim 1 and a liquid container according to the further independent claim solved. The dependent claims indicate preferred developments.

According to the invention, it is accordingly provided that the at least one connecting element is accommodated on a ventilation hose in the at least one guide element such that the ventilation hose can be displaced in or against a guide direction defined by the profile of the at least one guide element and movement in the other directions is prevented , The ventilation hose is further connected to at least one pulling means such that the ventilation hose can be displaced in or against the guiding direction by a pulling force exerted on a pulling point on the at least one pulling means.

Advantageously, a type of rail system is thus formed in the liquid container, on which the ventilation hose can be easily moved over the traction means and thus moved out of the liquid. Thus, the ventilation hose can be removed with little effort and in a reliable manner in order to clean, repair or otherwise maintain it. An exchange of the ventilation hose due to damage is possible in a simple manner and without much effort. Subsequently, the ventilation hose can be guided by the traction means of the guide element also simply transported back in the direction of the ground, there again to provide for a liquid gassing.

According to the invention it is provided that the at least one connecting element is at least partially part of the ventilation hose, so that the ventilation hose is designed in one piece with the at least one connecting element, for example by extrusion. As a result, a simple and secure reception of the ventilation hose in the guide element can be achieved.

Preferably, it can be provided that the at least one connecting element is at least partially formed by a bead-like thickening of the ventilation tube, wherein the bead-like thickening in the guide element can be accommodated such that the ventilation tube can be moved only in or against the guide direction and a movement in the other directions is prevented. Thus, the ventilation hose can be held by the thickening in a simple manner on the guide element.

According to a further embodiment it can be provided that the ventilation hose at least partially has a reinforcing element with spaced-apart holes, wherein the at least one connecting element is firmly or movably received in at least one of the holes in the reinforcing element, wherein the at least one connecting element is preferably formed as a thickening segment, wherein the at least one thickening segment can be received in the guide element such that the ventilation tube can only be displaced in or against the guide direction and a movement in the other directions is prevented. Thus, as an alternative or in addition to the integral thickening of the ventilation hose, preferably in the lower region, such a segmented thickening may also be provided for a connection.

Preferably, it is further provided that the at least one traction means extends from a first end of the ventilation hose to a first traction point and from a second end of the ventilation hose to a second traction point, so that the ventilation hose by a tensile force on the first traction point in the guide direction and by a Traction can be moved to the second pull point against the guide direction. This is achieved in a simple manner that the ventilation hose in both directions, i. E. in and against the guide direction, can be moved and apply a tensile force to different tow points for each displacement.

According to a preferred embodiment it is provided that the at least one traction means is formed by two pieces of rope, each piece of rope connecting different ends of the ventilation hose with different points of pull. Thus, a piece of rope is provided for each direction, which is preferably made of a water-resistant material and can withstand the tensile loads.

According to a further development, it is provided that the two cable pieces are connected to one another by an intermediate piece extending along the ventilation hose, so that a continuous cable is formed as the only traction means which connects the tie points with one another. Thus, advantageously only one traction means is needed, which pulls the ventilation hose by a tensile force at one end in one direction and by a tensile force at the other end in the other direction. The connection of the one cable to the ventilation hose can preferably take place in that the intermediate piece is embedded in the ventilation hose, preferably in the connecting element. For this purpose, the connecting element can be tubular, for example, so that the cable can be pulled through the connecting element and, if necessary, connected to it by an adhesive and / or by clamping. The connection between the traction means and the Ventilation hose can thus be easily formed.

Alternatively, it can be provided that the cable pieces are fastened to respectively different ends of the ventilation hose, for example via eyelets screwed into the ventilation hose on both sides, preferably into the connecting element. In these eyelets, the respective rope pieces can be threaded and guided to the tow points. As a result, the ventilation hose can be made simpler, since a tube shape can be omitted. Furthermore, the shape or the diameter of the traction means can be chosen or adapted freely. In addition, a replacement is easier if, for example, threatens to tear one of the pieces of rope.

Preferably, it is further provided that the guide element has the shape of a round or square C-section in section and the at least one connecting element of the C-profile is embraced such that the ventilation hose can be moved only in or against the guide direction and a movement in which prevents other directions. Thus, an easy to be manufactured and mounted on the liquid container C-profile can be used to simultaneously ensure a secure hold of the ventilation hose and a displacement along the guide direction. Alternatively, other profile shapes are possible that allow such functionality, such as a double-T profile.

According to a preferred embodiment it is provided that the guide element in the mounted state over its entire length has a continuous course or is divided into a plurality of spaced-apart segments. Thus, material can be saved, since only a single segment is sufficient for a guide, which - depending on the density of the segments - then also can define a guide direction accordingly.

Preferably, it can be provided that the continuous guide element is made in one piece or has multiple areas that can be joined together later. As a result, the transport and assembly can be simplified.

Preferably, it is further provided that the at least one traction point is operatively connected to a pulling device for effecting a tensile force on the at least one traction point, wherein the traction device is operated manually, preferably with a crank, and / or automatically, preferably with a motor. Thus, different ways are conceivable to transport the ventilation hose from the liquid tank. Depending on the course of the traction means, the traction devices can be arranged on the same side or on different sides of the liquid container.

The invention further provides a liquid container, in particular for the purification of waste water, with a ventilation system according to the invention, wherein the guide element is at least partially fixed to the floor and / or at least partially on the wall of the liquid container, preferably via a screw, and the at least one pull point of the at least one traction means is arranged above a surface of the liquid in the liquid tank, so that the ventilation hose can be pulled by a tensile force at the at least one traction point of the at least one traction means at least partially from the liquid. Preferably, the traction point through which the ventilation hose is pulled out of the liquid or from the bottom upwards is arranged outside the liquid. The other pull-in pull-in point can in principle also be arranged in the liquid, wherein a tensile force on this pull-point is then preferably exerted by an automatic pulling device.

• 1 zeigt einen Flüssigkeitsbehälter mit einem über ein Zugmittel verschiebbaren Belüftungsschlauch;
• 2a, 2b Detailansichten des Belüftungssystems;
• 3a, b Möglichkeiten der Verbindung zwischen dem Belüftungsschlauch und dem Zugmittel; und
• 4a, b Möglichkeiten der Befestigung eines Führungselementes am Flüssigkeitsbehälter.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments, in which reference is made to the accompanying drawings.

• 1 shows a liquid container with a displaceable via a traction means ventilation hose;
• 2a . 2 B Detailed views of the ventilation system;
• 3a, b Possibilities of connection between the ventilation hose and the traction means; and
• 4a, b Possibilities of fastening a guide element on the liquid container.

In 1 is an aeration tank as a liquid container 1 presented a sewage treatment plant, in which a liquid 2 , preferably water, especially wastewater. In the liquid container 1 is a ventilation system 3 arranged, in particular a ventilation hose 4 , a guide element 5 , a traction device 6 and a supply hose 7 having. The ventilation system 3 is mostly below a surface 2a the liquid 2 arranged.

The ventilation hose 4 is at least partially perforated, ie provided with slots and / or holes, to form a certain leakage rate, so that on the Zuluftschlauch 7 in the ventilation hose 4 Pressed air at sufficiently high pressure in the liquid 2 can escape and there required degradation processes can occur. The ventilation hose 4 is according to this embodiment in the area of the soil 1a of the liquid container 1 arranged to allow a fumigation in the deep fluid layers. About the supply air hose 7 is a connection to a compressor, not shown, possible for a certain air pressure in the hoses 4 . 7 provides.

Held the ventilation hose 4 from a guide element 5 , For example, a guide rail, in which the ventilation hose 4 via a eg in 2a and 2 B shown connecting element 14 on the ventilation hose 4 is included. The guide element 5 is in accordance with the execution in 1 divided into three areas. A first area 5a is consistently on the ground 1a of the liquid container 1 attached. This first area 5a serves in particular to the air filled, inflating ventilation hose 4 during operation of the ventilation system 1 on the ground 1a of the liquid container 1 to keep. A second area 5b is bent and bridges the horizontally extending first area 5a with a vertically extending third area 5c standing at a wall 1b of the liquid container 1 is attached.

The guide element 5 can be made in one piece or the individual areas 5a . 5b . 5c can represent individual elements that are joined together during assembly, eg by plug and / or screw connections. Furthermore, the guide element 5 also be segmented, ie the individual areas 5a . 5b . 5c themselves do not run consistently, leaving the ventilation hose 4 is held only in places. The assembled guide element 5 defined by its course in the liquid container 1 one in 1 dash-dotted line direction indicated A passing through the bend in the second area 5b not straight.

The guide element 5 is designed such that the over the connecting element 14 in the guide element 5 recorded ventilation hose 4 in or against the direction of leadership A can be moved. This allows the ventilation hose 4 in a simple way and controlled from the ground 1a of the liquid container 1 along the three areas 5a . 5b . 5c to the surface 2a the liquid 2 be guided. Subsequently, the ventilation hose 4 with the connecting element 14 from the guide element 5 eg "unthreaded" and thus completely removed. Thereupon, a maintenance or a repair or a cleaning of the ventilation hose 4 be performed. Under certain circumstances, can also replace the ventilation hose 4 respectively.

Subsequently, the ventilation hose 4 with the connecting element 14 again in the guide element 5 (in the third area 5c) "Threaded" and from there against the leadership direction A to the first area 5a be moved so that the ventilation hose 4 again his gassing function on the ground 1a of the liquid container 1 can record.

To the ventilation hose 4 easy and comfortable along the guide element 5 in or against the direction of leadership A to be able to move, goes from the ventilation hose 4 a piece of rope on both sides 6a . 6b as traction means 6 off, with the pieces of rope 6a . 6b each with the ventilation hose 4 are firmly connected and thus can take this. Instead of the pieces of rope 6a . 6b but can also be a chain or any other elongated element as a traction device 6 be provided. A first piece of rope 6a runs from a first end 4a of the ventilation hose 4 guided by the guide element 5 to a first tow point 8a outside the liquid 2 , Starting from a second end 4b of the ventilation hose 4 leads a second piece of rope 6b via a pulley 9 to a second tow point 8b outside the liquid 2 ,

By applying a tensile force F at the first pull point 8a can the ventilation hose 4 along the guide element 5 to the surface 2a the liquid 2 be pulled to a controlled removal of the ventilation hose 4 to enable. By applying a tensile force F on the second tow point 8b can the ventilation hose 4 along the guide element 5 controls again in the first area 5a its and thus to the ground 1a of the liquid container 1 to be pulled. It can be a stop 10 in the first area 5a of the guide element 5 be provided to give a haptic feedback when the ventilation hose 4 is at its final position. The tensile force F to the respective tow point 8a . 8b can in this case by a pulling device 16 be applied manually, for example with a crank, and / or automatically, for. B. with a motor operated.

Basically, the tow points 8a . 8b by an appropriate choice of the course of the rope pieces 6a . 6b possibly further pulleys inside and / or outside the fluid 2 also on the same side of the liquid container 1 be arranged to simplify the operation. The second tow point 8b can, if for example motor driven, also in the liquid 2 lie.

Furthermore, the guide element 5 in 1 in addition to the left side of the liquid container 1 run out, in which case a curved second area 5b and one on the left wall 1b running third area 5c available. This can be a two-sided removal of the ventilation hose 4 be enabled if a traction F at the corresponding tow point 8a . 8b is applied.

2a shows an end 4a ; 4b in the guide element 5 guided ventilation hose 4 in a perspective detail view. Accordingly, it is provided that the ventilation hose 4 with an inserted perforation 4c in its lower part a continuous bead-like thickening 4d as a connecting element 14 having. This may be extruded or otherwise attached. The bead-like thickening 4d is in a guided as a C-profile guide element 5 recorded to the longitudinal movement in or against the guide direction A to ensure. The C-profile is on the underside of the floor 1a or on the wall 1b of the liquid container 1 attached. In the second area 5b of the guide element 5 is the C-profile bent accordingly.

The rope pieces 6a . 6b are according to 3a over an intermediate piece 6c connected together, so that as a traction device 6 a continuous one-piece rope is formed by the thickening 4d passed through, the thickening 4d then tubular. The intermediate piece 6c is solid with the thickening 4d connected so that the ventilation hose 4 by a tensile force F on one of the pieces of rope 6a . 6b can be taken.

According to 3b can the rope pieces 6a . 6b also at the end of the ventilation hose 4 in the area of thickening 4d be attached, with the thickening 4d then executed as a solid material and this solid material as a connecting element 14 recorded in the C-profile. For this example, an eyelet 11 laterally in the thickening 4d be screwed. In the eyelet 11 then becomes the respective rope piece 6a . 6b fastened in a suitable manner. Other types of attachment can be chosen. For example, the rope pieces 6a . 6b in a suitable way directly with the thickening 4d be connected at the end. In an end attachment by the two pieces of rope 6a . 6b two separate traction devices 6 provided between each end 4a . 4b of the ventilation hose 4 and the respective tow point 8a . 8b run.

According to 2 B can be provided in a further embodiment that no continuous bead-like thickening 4d is provided, but several thickening segments 4e on the ventilation hose 4 are attached, so that several fasteners 14 available. The several thickening segments 4e are in one down from the ventilation hose 4 protruding reinforcement area 12 arranged at intervals. The several thickening segments 4e are then also in the guide element 5 or in the C-profile added to the ventilation hose 4 to hold and guide as described. The thickening segments 4e can be part of the gain range 12 be yourself or attached to this fixed or movable, for example, over holes 15 , as in 2 B indicated.

Basically, instead of the thickenings 4d or the thickening segments 4e , which intervene in a C-profile, also be provided other types of connection that allow the ventilation hose 4 over the connecting element 14 in the guide element 5 is received and in it only longitudinally displaceable in or against the guide direction A can move. For example, the guide element 5 be designed as a double-T-profile, in the two sides of the aeration hose 4 connected clip-like connection element 14 engages and thus allows only a longitudinal displacement along the double-T profile.

According to the 4a and 4b is the designed as an angular or round C-profile guide element 5 via screw connections 13 on the ground 1a or the wall 1b of the liquid container 1 attached. But it can also be provided any other connection.

LIST OF REFERENCE NUMBERS

1

liquid container

1a

Bottom of the liquid container

1b

Wall of the liquid container

2

liquid

2a

Surface of the liquid

3

ventilation system

4

ventilation tube

4a

first end of the ventilation hose 4

4b

second end of the ventilation hose 4

4c

perforation

4d

thickening

4e

thickening segment

5

guide element

5a

first (horizontal) area of the guide element 5

5b

second (bent) region of the guide element 5

5c

third (vertical) area of the guide element 5

6

traction means

6a

first piece of rope

6b

second rope piece

6c

connecting piece

7

Air supply

8a

first train point

8b

second train point

9

idler pulley

10

attack

11

eyelet

12

gain range

13

screw

14

connecting element

15

hole

16

hitch

A

guide direction

F

traction

Claims (14)

Ventilation system (3) for aerating a liquid (2), in particular waste water, in a liquid container (1), with a perforated ventilation hose (4) for the discharge of air bubbles into the liquid (2), wherein the ventilation hose (4) via at least one connecting element (14) is received in at least one guide element (5), wherein the guide element (5) for attachment to a bottom (1 a) and / or a wall (1 b) of the liquid container (1) is suitable, so that in at least one guide element (5) accommodated aeration hose (4) on the bottom (1 a) and / or the wall (1 b) of the liquid container (1) can be held, wherein the at least one connecting element (14) in such a way in the at least one guide element (5) is accommodated, in that the ventilation hose (4) can be displaced into or against a guide direction (A) defined by the path of the at least one guide element (5) and can move into the and Heen directions is prevented, characterized in that the at least one connecting element (14) at least partially part of the ventilation hose (4), so that the ventilation hose (4) with the at least one connecting element (14) is made in one piece, and the ventilation hose (4 ) is further connected to at least one traction means (6) in such a way that the aerating hose (4) is moved in or against the guiding direction (A) by a tensile force (F) exerted on a traction point (8a, 8b) on the at least one traction means (6). can be moved. Ventilation system (3) after Claim 1 , characterized in that the ventilation hose (4) with the at least one connecting element (14) is made in one piece by extrusion. Ventilation system (3) after Claim 1 or 2 , characterized in that the at least one connecting element (14) at least partially by a bead-like thickening (4d) of the ventilation hose (4d) is formed, wherein the bead-like thickening (4d) in the guide element (5) can be accommodated such that the ventilation hose ( 4) only in or against the guide direction (A) can be moved and a movement in the other directions is prevented. Ventilation system (3) according to one of the preceding claims, characterized in that the ventilation hose (4) at least partially a reinforcing element (12) with spaced-apart holes (15), wherein the at least one connecting element (14) in at least one of the holes (15 ) is received in the reinforcing element (12) fixed or movable, wherein the at least one connecting element (14) preferably as a thickening segment (4e) is formed, wherein the at least one thickening segment (4e) in the guide element (5) can be accommodated such that the ventilation hose (4) can be moved only in or against the guide direction (A) and a movement in the other directions is prevented. Ventilation system (3) according to one of the preceding claims, characterized in that the at least one traction means (6) from a first end (4a) of the ventilation hose (4) to a first pull point (8a) and from a second end (4b) of the ventilation tube (4) to a second pull point (8b) runs, so that the ventilation hose (4) by a tensile force (F) on the first Zugpunkt (8a) in the guide direction (A) and by a tensile force (F) on the second Zugpunkt ( 8b) against the guide direction (A) can be moved. Ventilation system (3) according to any one of the preceding claims, characterized in that the at least one traction means (6) by two rope pieces (6a, 6b) is formed, each piece of rope (6a, 6b) has different ends (4a, 4b) of the ventilation tube ( 4) with different tow points (8a, 8b) connects. Ventilation system (3) after Claim 6 , characterized in that the two rope pieces (6a, 6b) are connected to one another by an intermediate piece (6c) running along the ventilation hose (4), so that a continuous cable is formed as the only pulling means (6) which connects the draw points (8a, 8b) to one another. Ventilation system (3) after Claim 7 , characterized in that the intermediate piece (6c) in the ventilation hose (4), preferably in the connecting element (14) is embedded. Ventilation system (3) after Claim 6 , characterized in that the cable pieces (6a, 6b) at each of different ends (4a, 4b) of the ventilation hose (4) are fixed, for example, on both sides in the ventilation hose (4) screwed eyelets (11) into which the respective piece of rope ( 6a, 6b) is threaded. Ventilation system (3) according to any one of the preceding claims, characterized in that the guide element (5) in section has the shape of a round or square C-profile and the at least one connecting element (14) is encompassed by the C-profile such that the Ventilation hose (4) only in or against the guide direction (A) can be moved and a movement in the other directions is prevented. Ventilation system (3) according to any one of the preceding claims, characterized in that the guide element (5) in the mounted state over its entire length has a continuous course or is divided into a plurality of spaced-apart segments. Ventilation system (3) after Claim 11 , characterized in that the continuously extending guide element (5) is made in one piece or has a plurality of areas (5a, 5b, 5c), which can be subsequently joined together. Ventilation system (3) according to one of the preceding claims, characterized in that the at least one traction point (8a, 8b) is in operative connection with a traction device (16) for effecting a traction force (F) on the at least one traction point (8a, 8b), wherein the traction device (16) is operated manually, preferably with a crank, and / or automatically, preferably with a motor. Liquid container (1), in particular for the purification of wastewater, with a ventilation system (3) according to one of the preceding claims, wherein the guide element (5) at least partially on the bottom (1a) and / or at least partially on the wall (1b) of the liquid container (1) is fastened, preferably via a screw connection (13), and the at least one pull point (8a, 8b) of the at least one pulling means (6) is arranged above a surface (2a) of the liquid (2) in the liquid basin (1), so that the ventilation hose (4) can be pulled at least partially out of the liquid (2) by a tensile force (F) at the at least one pull point (8a, 8b) of the at least one traction means (6).

Images