DK141549B - Installations for surface aeration of water, especially wastewater in a basin, with at least one floating, moving and rotating surface air on the water surface. - Google Patents

Description

(® (11) PUBLICATION 1 4 1 549 DENMARK lnLCI · * c 02 F 3/14 '(21) Application No 1667/70 (22) Files'' on 2 Apr 1970 (23) Running day 2 Apr. 1970 (44) The application presented and, non

the petition published on April I yOU

DIRECTORATE OF THE 'PATENT AND TRADEMARKET (3 °) Worit' request 'from the

Apr 3 1969, 1917462, DE

May 21, 1969, 826601, US

(71) PASSAVANT WORKS, Michelbacher Huette, b / Michelbacher, Nassau, BE: BELOIT-PASSAVANT CORPORATION, 3939 Whithey Street, Janesville, Wisconsin, US.

(72) Inventor: Josef Maskat, Auf dem Langwehr, Mlchelbach, DE: Dieter Klump, Heidestrasse 7, Michelbach, DE: Juergen Sieekmann, Heidestrasse 9, Mi = = chelbach, DE: Edward J. Baumann, 755 Petunia Lane, Beloit, Wisconsin 5511, US.

(74) Plenipotentiary in the proceedings:

Hofman-Bang & Boutard Engineering Company.

(54) Installations for surface aeration of water, in particular wastewater in a basin, with at least one floating, moving and rotating surface * venting on the water surface.

The invention relates to an air system of the kind specified in the preamble of claim 1.

From German Patent Specification No. 1,214,203, such a plant is known whose surface air rotates about a vertical axis and is guided by a rod in such a way that it is moved on a circular path.

Such a vertical axis rotary fan produces in the water a flow which propagates uniformly on all sides and whose horizontal components are the same in all directions. However, since the reaction forces of the said horizontal components of the flow act with different lever arms for the point of pivot of the rod, a torque of the air circulating forcing is obtained. However, the circular or helical flow provided by the air branch in the water distributes at increasing distance from the air in all directions on an ever-increasing water surface, so that the intensity of the flow decreases rapidly. The flow is therefore not far-reaching, so that the oxygen-enriched flow from the rotor at all times affects only a relatively small water surface. Should such an arrangement allow large basins or ponds to be vented, the rotary air would have to be moved practically over any point on the water surface. This would require complicated controls and it would take a long time for the fan to reach a previously aerated point again.

The invention has for its object to provide an air system of the specified type, by means of which a more effective and far-reaching aeration can be obtained than by means of the known systems, so that, even if the air is circulated on only one lane, a effective aeration of distant areas at the water surface. This is achieved by the characterizing part of the main claim. The flow component emanating from the surface air in only one direction is more intense and far-reaching than a flow spreading in all directions, and since the flow provided by the air heater is not directed exactly opposite to the air flow direction, but forms an angle deviating from 180 °. with this, the air effect is not limited to the "wake" of the surface air, but also affects the areas of the airway path located. In this way, effective aeration of even large water surfaces is achieved.

The air flow component, which is generally rectilinear, the horizontal flow component can be provided in different ways. Particularly suitable is the use of a rotating surface air with a horizontal axis of rotation. Such a fan produces a rectilinear horizontal flow across said axis of rotation.

By using a fan of this type, the intended effect described above can be obtained by the properties specified in claims 2 or 3.

If a surface aerator with substantially vertical axis of rotation is used, the rectilinear flow can be provided by the means of claim k or claim 6. In the embodiment according to claim 5, the air travel speed is adjustable.

·. L

As set forth in claim 7, the residence of the water vesicles introduced into the water is prolonged, thereby improving the effect of the introduced oxygen.

The aforementioned claim 8 avoids any weakening or other detrimental effect of the horizontal flow component of the water falling on the water surface.

By the features of claim 10, the required reaction force is simply produced.

The anchorage location of claim 11 forms the center of a circular path of movement of the rotor. In the case of elongated basins or ponds, it is advantageous to guide the rotor along a straight line, e.g. ; a guide rope or guide rail in the same way as a ferry.

The embodiment of claim 12 is particularly intended for horizontal axis rotors. In the trade specified in claim 12, one can easily adjust the rotor according to the desired angle between the feed direction and the rotor axis.

The direction of rotation of the rotor should be reversible. In particular, this reversal can be effected at the two turning points of a straight line of motion at the means of claim 13. These bodies may e.g. such as impact switches, light barriers or means for wireless emission of control signals to receiving means.

When the rotor is driven along a closed path, e.g. a circular web is obtained by the means as claimed in claim 14, that the water surface area enclosed by the web is also aerated and that the control elements are only affected by features, so that ropes can be used as control elements.

Furthermore, the risk that widths near the path of the rotor, whether these widths are protected or unprotected, are reduced by the water flow generated by the rotor.

As stated in claim 15, the ventilation effect is intensified by extending the residence time of the ventilator within a specific water area.

4 urns

Finally, according to claims 16 and 17, the braking effect resulting from the baffle plate and the rotor or rotating in one direction, respectively, and thus the speed of delivery of the air, can be adjusted very accurately depending on varying operating conditions.

In the following, the invention is explained in more detail with reference to the drawing, in which fig. 1 is a top view of an embodiment of the plant according to the invention with two air rotors with a horizontal rotor axis in a cross-sectional air dam.

FIG. 2 is a top view of an air rotor with a horizontal axis in an oblong basin.

FIG. 3 is a vertical section through an oblong basin with a transverse axis rotor with horizontal axis; FIG. 4 shows a rotor driven on a circular path with inclined horizontal axis; FIG. 5 is a top view of a horizontal axis air rotor with a guide plate; FIG. 6 is a vertical section through an air rotor with a guide plate, also formed as a baffle surface and with a bottom clearance shield; FIG. 7 is a top view of a vertical axis air rotor; FIG. 8 shows a vertical-type air rotor whose rotor axis forms a pointed angle with vertical; FIG. 9 is a partial vertical section through a vertical axis air rotor with a partially covered inflow cross section; FIG. 10 is a top plan view, FIG. 11 is a side elevational view of a vertical axis air rotor with a partially covered outflow cross-section, FIG. 12 is a top view of a unit consisting of an air rotor and of a clarifier pool; FIG. 13 is a vertical sectional view of the one shown in FIG. 12; FIG. 14 is a side view of a horizontal axis air rotor with a baffle plate; and FIG. 15 is a surface air consisting of two horizontally rotating air rotors with horizontal axis.

In FIG. 1 shows an air basin or air dam 1 of circular horizontal cross-section. In the basin, two air rotors 2 and 2 'work with a horizontal rotor axis. The rotors are each supported by two swivel arms 3 and 3 ', respectively, located at the two ends of the rotors. Each rotor has a drive motor 4. The rotors are connected by means of control elements 5 in the form of rods or ropes to a stationary anchorage point 6 located in the center of the basin that they can be advanced on circular paths around it. The left rotor is attached to. the anchorage point 6 at two with each rotatingly connected guide elements 5 of such an unequal length that the angle between the axis of the rotor on one side and the connecting line between the center of said axis and the anchorage point 6 on the other, differs from 90 °. This rotor 2 is driven in such a direction of rotation that it produces a horizontal, water flow directed at the center of the basin, indicated by four arrows, which produces an opposite reaction force on the rotor. Since this reaction force, due to the inclination of the rotor, is not directed precisely radially outwards but has a tangential component, the rotor is advanced on a circular path around the anchorage point 6 in the direction indicated by arrow A.

The rotor 2 * to the right in FIG. 1 has its axis perpendicular to the connecting line between the center of this axis and the anchorage point 6. This rotor is driven in such a direction that the horizontal water flow produced by the rotor is directed outwards, i.e.. toward the outer wall of the basin. In this horizontal water flow region there is a guide plate 7 which is attached to the rotor by means of rod-shaped connecting means 8 and which has such a position that it, in the same way as a rudder, directs part of the flow in the tangential direction. The reaction force acting thereby on the control plate and thus also on the rotor 2 'propels the rotor 2' in the direction of the arrow B on a circular path around the anchorage point 6. By means of not shown, the angular position of the rotor 2 and the angular position of the control plate 7 can be changed.

FIG. 2 shows a rectangular, oblong air basin 9 with a horizontal axis air rotor 2 supported by swimmers 3. The rotor 2 can be moved back and forth along a rectilinear movement path 10 by means of a tensioned shaft. The axis of rotation of the rotor is parallel to the direction of motion, so that the horizontal water flow produced by the rotor driven by a drive motor 4 is directed perpendicular to the direction of movement of the rotor. On the discharge side of the rotor, there are three guide plates 7 which partially divert the water flowing from the rotor in the longitudinal direction of the rotor so that the rotor is advanced in the direction of the moving path 10 by the resulting reaction force. At the two ends of the path, there are activated switching elements 11 which, in cooperation with corresponding switching elements on the rotor itself, reverse the direction of movement of the rotor either by reversing the direction of rotation of the rotor or by changing the angular position of the control plates 7 *.

FIG. 3 shows a rectangular oblong basin 9 with a horizontal axis air rotor 2. The rotor is so guided by a guide pulley 10 that the rotor axis is perpendicular to the direction of rotation of the rotor so that a generated reaction force can be utilized directly to advance the rotor. Therefore, no guide plates are required. However, in this embodiment, it may be disadvantageous under certain conditions that the water surface areas of the rotor on the right and left of the rotor are at no time included in the flow produced by the rotor and thus not affected by the air power.

FIG. 4 shows in more detail the constructive design of the control means for an air rotor corresponding to the rotor 2 in FIG. 1. At the anchorage site corresponding to site 6 of FIG. 1, there is a rotatable flange or hub 14 connected by longitudinally adjustable rods 12 to the two swimmers 3a connected to each end of the rotor shaft for supporting the rotor. The selected lengths of the rods 12 * 7 are secured by screws 13, thereby defining the angular position of the rotor 2. The swimmers 3a have a favorable hydrodynamic shape relative to the circular feed path of the rotor.

Pig. 5 and 6 show, respectively, from above and from the side a rotor 2, which is connected to the hub 14 of the anchoring site 6 by two equally long guide elements 5, so that the axis of the rotor is perpendicular to the radius. On the discharge side of the rotor is placed a baffle plate 15 which deflects the horizontal water flow produced by the rotor downwards, thereby increasing the time during which the air bubbles introduced into the water remain in the water. The baffle plate 15 is fixed asymmetrically to the rotor in vertical projection, so that it also acts as a rudder that overflows the flowing water in a tangential direction, thereby producing a reaction force in the direction of movement of the rotor. The baffle plate 15 is via a rod system 16, fig. 6, connected to a bottom clearing shield 17, thus advanced by the rotor's reaction force and clearing the bottom sludge deposited on the bottom of the basin 18 into a slurry 20. The hub 14 is positioned on the upper end of a column 19 projecting upwardly from the bottom of the basin. located above the water surface 21 of the basin.

FIG. 7 is a top view of a vertical axis rotor 22. The rotor is connected by means of support rods 23 to a float 3b, which is in the form of an incomplete octagonal ring surrounding the rotor, which rotates in the direction of the arrow E. Under the action of the suction from the rotor, an upward flow towards the rotor is produced, and a flow of water passing through the aperture in the ring 3b approximately radially outwardly away from the rotor, indicated by the three arrows C in FIG. 7. By the resulting reaction force, the rotor, which is connected via rods 5 to the pivotal hub 14 at the anchorage point 6, is driven on a circular path in the direction of the arrow D.

FIG. 8 shows a rotor 22 with a drive motor 4, the axis of the rotor forming an acute angle with a vertical, so that the flow of water gets a rotor-feeding component. The swimmer 3 supporting the rotor is in the form of a closed ring. The float 3 thus has upwardly inwardly sloping inner faces 15 that these serve as baffles to deflect the horizontal water flow provided by the rotor downwards.

8 U1549

In the case of an exact vertical axis rotor, one can also produce a rotor feeding component in the water flow by covering a non-rotationally symmetrical portion of the inflow cross section and / or the outflow cross section. FIG. 9 and 10 show such an exact vertical rotor 24, one half of the circular inflow cross section being covered by a cover plate 25. Therefore, the rotor will only suck water onto the left half of the inflow cross section of FIG. 9 and 10 and will therefore be influenced by a unilaterally directed movement force.

FIG. 11 shows a rotor 24 in which one half of the flow-away cross-section is covered by a plate 26, so that the water sucked over the total flow cross-section of the rotor can only be ejected to the left. The shear force thus obtained on the rotor is directed to the right in FIG. 11th

FIG. 12 and 13 illustrate an embodiment in which the rotor 2 is secured by means of outriggers 5 and 5a to a top and bottom open vertical cylinder 27 carried by an annular swimmer 30. In the center of the cylinder is a stationary, rotatable column 19 to which upper end cylinder 27 is secured by clamping ropes. The rotor 2 is inclined with respect to the cylinder such that a line passing through the center of the rotor axis and perpendicular to the rotor axis does not pass through the point 6. Therefore, as the rotor rotates, a peripherally directed feed component rotating the assembly consisting of the air rotor and the cylinder 27 is produced. around point 6.

The cylinder 27 almost reaches the bottom 28 of the basin and encloses a flow-free clarification zone 29 in which sludge particles can be separated from the water by sedimentation. The upper face of the annular swimmer 3c * is in the form of a drain ring 30 through which the clear water is discharged. This water is conveyed through a conduit to the central column 19, which rotates together with the cylinder 27 and the rotor 2. From the column 19, this water is conveyed through a conduit to the edge of the basin. The latter wire is connected to the column by means of a swivel seal. Through the annular gap between the lower edge of the cylinder 27 and the bottom 28 of the basin, a quantity corresponding to the amount of drained water continuously flows into the clearing zone within the cylinder.

The rotor 2 is driven in the direction of the arrow in FIG. 13 indicates the direction in which the water flow exiting from the rotor is directed outwards and at which a suction zone appears on the inside of the rotor. This suction zone, by means of a plate 33 of suitable shape for controlling the flow, is extended downwards to the area at the annular gap between the lower edge of the cylinder 27 * and the bottom 28 of the hassin, so that sludge deposited at the annular space at this point is sucked upwards. This sludge is effectively re-mixed with the air rotor 2 with the water to be treated.

A bottom spade shield is attached at its outer end to the cylinder 27 and with its inner end pivotally mounted on the center column 19.

The shield is circulated by means of the reaction force of the rotor 2 together with it and with the cylinder 27, thereby transporting the deposited bottom sludge outwards. The shield is located immediately in front of the air rotor, calculated in the circumferential direction, so that during the rotation, the suction zone 22 will continuously suck up a quantity of mud accumulated by means of the clearing shield.

To compensate for the weight of the rotor placed on one side of the cylinder 27, additional swimmers can be found, in particular the outriggers 5 and 5a can be designed as swimmers. The said commercial | Of course, retention can also be achieved by placing an additional rotor on the other side of the cylinder 27 diametrically opposite the rotor 2.

The i'fig. 14, the horizontal axis air rotor 34 is carried by swimmers 35 and driven by a motor 37 so that it rotates in the direction of the arrow. The rotor is thereby advanced in the direction of the arrow 40. For braking this propulsion, there is in the region of water flowing from the rotor a baffle plate 36, which in part eliminates the reaction force produced. The baffle plate 36 also has the advantageous effect of directing the generated air-enriched water flow down to deeper water layers. The baffle plate 36 may be adjustable in height or adapted to be inclined relative to the vertical for varying the braking action.

141549 10

FIG. 15 shows a surface air vent with two horizontal axis air rotors 34 and 38 driven in opposite directions by the same drive motor 37 via drive belts or drive chains 39 · The generated water flows meet between the two rotors 34 and 38 and deflect one another downwardly so that with Oxygen-enriched water reaches into lower water layers. Therefore, one air rotor 34 is larger in diameter and, when both rotors are operated at the same orbital speed, will have a greater peripheral speed than the other rotor 38. Therefore, the reaction force of the rotor 34 will be overweight so that the surface air moves in the direction of arrow 40 at a feed rate. which is braked by the reaction force of the rotor 38. Instead of two rotors having the same orbit and odd diameter, of course, two rotors of the same diameter but of odd orbit can also be used. Furthermore, the surface air may have e.g. three horizontal axis air rotors, the same diameter and the same orbit, one rotor rotating opposite the other two rotors. Also in the latter two cases, a large air effect and a relatively small resultant propulsion force are obtained in one direction. The same effect can be obtained with two mutually opposite rotating rotors of the same diameter and the same circulation number, with the air elements on one rotor being located less close to each other in axial and / or peripheral direction than on the other rotor.

Furthermore, the speed of the surface air supply can be slowed down by the air being blinded by a rope with a fixed anchorage point, which rope is rolled from a braked drum. This option not shown in the drawing is particularly suitable for surface aerators to be moved forward along a straight line. The braked drum may be located either at the fixed anchorage site or at the surface aerator. The drum may also be provided with a drive means so that it can serve as a winch by means of which the rolled-up rope is rolled up so that the surface air is withdrawn to the exit point against the effect of the thrust provided by the reaction force itself. Such a fan can be moved back and forth without changing the direction of rotation of the fan rotor.

Claims (12)

1. Surface aeration systems of water, in particular wastewater, in a basin or pond (1) for treating the wastewater, with at least one floating surface rotating surface air (2 or 22) floating over the water surface on a particular course at the reaction force arising from a flow provided by the aerator in the water along said path and controlled on the path by means of control elements (5), characterized in that the surface ventilator is designed to produce a radially horizontal stream flowing from the aerator. and the fan is controlled in such a way that the angle between its direction of movement and the direction of said flow component in the water differs from 180 °. Air system according to claim 1, with a surface air in the form of a rotor with a horizontal axis of rotation, characterized in that the rotor (2) is controlled in such a way that the angle between the axis of rotation and the direction of movement of the rotor differs from 90 °. Air system according to claim 1, with a surface air in the form of a rotor with a horizontal axis of rotation, characterized by one or more control plates (7) arranged in the rotor distancing area of the rotor so as to deflect the flow produced in a direction forming an angle of 90 ° deviating from the rotor axis. Air system according to claim 1, with a surface air in the form of a rotor with approximately vertical axis of rotation, characterized in that said axis of the rotor forms a small angle with vertical and that the rotor axis containing vertical plane forms an angle deviating from 0 with that of the direction plates forced flow direction. Air system according to claim 4, characterized in that the angle of inclination of the rotor 12 is adjustable. Air system according to claim 1, with a surface air in the form of a rotor with a vertical axis of rotation, characterized in that cover plates (25, 26) are arranged in the inflow area or flow area of the rotor (22), so as to eliminate the flow cross section rotational symmetry in such a way as to provide the substantially rectilinear flow component. Air system according to claim 1, characterized in that baffle plates (15) are provided for deflecting part of the horizontal horizontal component produced. Air system according to claim 7, characterized in that the baffle plates (15) are arranged at such a distance from the surface air (2, 22) that they cover the area where the air swirled by the air falls again on the normal water surface. Air system according to claim 1, 3, 6 or 7, characterized in that the control plates (7), cover plates (25, 26) and / or baffle plates (15) are arranged or formed on one or more swimmers (3, 3b). ). Air system according to claims 6 and 9, characterized in that the float (3b) is designed as an annulus (22) surrounding ring with one or more openings for a horizontal flow passing through this or these passages. Air system according to any one of claims 1-10, characterized in that the control elements (5) consist of a tensile connection between the surface air and a stationary anchorage point (6) or between the air heater and a longitudinal guide (10). 11 141549 Air system according to claim 11, with a rotor with a horizontal rotor axis, characterized in that the ends of the rotor are connected to the anchoring site (6) or to the length guide (10) by means of odd long control elements (5), especially in the longitudinally adjustable rods (12). ).