EP2480308A1

EP2480308A1 - Device for removing and condensing floating sludge

Info

Publication number: EP2480308A1
Application number: EP10765369A
Authority: EP
Inventors: Bernd Glaser
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-24
Filing date: 2010-09-17
Publication date: 2012-08-01
Also published as: WO2011035871A1; DE202009012996U1

Abstract

The invention relates to a device for removing and condensing and disposing of floating substances from the surface of waste water in a clarifier (1), comprising a condensing channel (3), means for gently feeding floating substances (6) from the clarifier (1) into the condensing channel (3), means for removing floating sludge (12) at or before an end of the condensing channel (3), and means for producing a fluid flow (11) in the condensing channel directed toward the means for removing floating sludge in the longitudinal direction of the condensing channel.

Description

DEVICE FOR PULLING AND LUBRICATING SWIMMING MUD

The invention relates to a device for removing and thickening of floating matter.

From DE 196 27 161 Al a clearing device for floating or scum is known, in which the floating substances located on the wastewater surface are conveyed by means of a screw conveyor in an intermediate container. The intermediate container has a bottom valve, which allows water to pass either from the inside to the outside or from the outside inwards. The conveyed material is pumped out of the intermediate container discontinuously.

In the other known Schwimmschlammentnahmesystemen a high water content is pumped together with the removed scum. Furthermore, the scum can be drained only limited.

The invention has for its object to provide a device that reduces by simple means the scum removed from the water content from a clarifier.

The object is achieved by a device for thickening of floating matter with the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The device according to the invention for drawing off and thickening and removing floating matter from the surface of a wastewater in a clarifier has a thickening channel, Means for gentle feeding of floating matter from the clarifier into the thickening channel,

Means for removing scum at or before one end of the thickening channel and

Means for generating a directed in the longitudinal direction of the thickening channel on the means for removing fluid flow in the thickening channel.

The device removes by means of gentle feeding floating matter from the clarifier and leads them to the thickening channel gently. In the process, a proportion of water is taken with the floating matter. This is especially the case when only a few floating substances float on the water surface in the clarifier. The scum from the means for gentle feeding the thickening channel is thus a mixture of scum and water with a high water content. Since the means for gently feeding the floating matter gently to the thickening channel, the floating substances are not crushed during feeding. If, on the other hand, the floating sludge were conveyed out of the settling tank into the thickening channel by means of a high-speed centrifugal pump, the floating sludge would be crushed and small sludge floes would remain, which no longer show pronounced Aufschwimmoder settling, so that they are difficult separable from the water. The gently supplied to the thickening channel floating settles in the thickening channel from the water and floats on the water surface. By the means for generating a fluid flow, a flow is generated in the thickening channel, which transports the scum to the means for removal at or before the end of the thickening channel. Due to the flow, the scum is increasingly thickened as it approaches the extraction means. The thickening is dynamic, ie in the horizontal passage through the thickening channel. The thickened scum is from the means for removing from the Deducted water surface. All known sampling systems can be used as a means for removal at the end of the thickening channel. The thickening channel can be open or closed at the top. It can be an open-topped channel, for example, with a U-shaped cross-section or a closed channel or a pipe, for example, with box cross section or circular cross section. It may be partially open laterally or completely or partially below.

The means for gentle feeding of floating matter from the clarifier in the thickening channel can be designed differently. According to one embodiment, they have at least one at least partially height-adjustable and / or provided with at least one opening with an open and closable closure side wall of the thickening channel arranged in the clarifier. This side wall basically separates the thickening channel from the water in the clarifier. By adjusting at least a portion of the side wall, however, it is possible to establish a connection between clarifier and an open-top thickening channel, can be fed through the gently scum the thickening channel. After the scum has entered the thickening channel, the side wall can be returned to its original position, so that the thickening channel is separated from the clarifier. Alternatively, by opening a closure, an opening in the open-top or closed-up thickening channel can be cleared, through which floating material enters the thickening channel. After the thickening channel is sufficiently filled with floating substances, the opening can be closed by closing the closure. Thereafter, the above-mentioned separation process can take place in the thickening channel.

Preferably, the fluid flow is turned off in the thickening channel during the connection of the thickening channel with the clarifier. In principle, however, it is also possible for the fluid flow during the feeding of the scum in the Unchanged or reduced thickening channel, wherein the fluid flow due to a suction effect may help to convey scum into the thickening channel.

According to a further embodiment, at least one side wall of the thickening channel is displaceable upwardly and / or downwardly and / or outwardly and / or inwardly at least in sections with respect to the remaining parts of the thickening channel in order to release the inflow cross section for scum. According to a further embodiment, for this purpose, the side wall is at least partially pivotable about a horizontal and / or vertical joint and / or adjustable in the vertical direction. For this purpose, the upper edge of the side wall can be pivoted by means of a hinge device down and / or to the side or the upper edge for displacing the side wall or a portion thereof in a guide are moved vertically. Also, pulling up the side wall or a portion thereof is an option. In particular, the thickening channel can have one or more subdivided sidewalls, which can be folded away from the thickening channel in a horizontal plane.

According to another embodiment, the means for gently feeding the scum on means for displacing the entire thickening channel. According to one embodiment, these are means for vertically displacing the thickening channel and / or pivoting the thickening channel about a horizontal axis. Preferably, the side wall of the thickening channel on the side through which the scum is withdrawn, lower, than the opposite side wall.

According to another embodiment, the entire feed and thickening channel can be arranged so that the ground in the raised state partially or completely above the water surface. A sliding plate on the outlet side prevents the water-sludge mixture from running off to the side in an uncontrolled manner. At the other end of the movable channel can be closed with a front plate. Preferably, the raised channel (channel) is still provided with a slope to the Schwimmschlanimentnahmevorrichtung. The amount of motive water can be significantly reduced or eliminated altogether. As a transitional construction to the Schwimmschlamungnahme are on the link plate two dipping into the water feed plates between which he pre-thickened floating mud, for example, then a ski gutter tapers. If the means for Schwimmschlammentnahme eg. a suction pot (a pot with a submersible pump at the lower end, which is adjusted so that the scum flows out over the upper edge of the suction cup), the feed plates are still closed with a front plate (baffle) at the end, so that the scum does not sink into the basin can flow back. Further, if a soil is used and this construction is thus expanded into a box and there is a drainage device on this box, which drains off the excess water, only a scum pump is sufficient to pump out the remaining scum. It is advantageous here to use a drainage device, which only allows the water through in one direction (eg non-return flap). If the collection box is moved along with the channel, the link plate can be omitted. Instead of a drain valve, the box can also be designed so that there is a baffle wall in front of the rear wall and the rear wall is designed so high that the water can flow back into the basin beyond. The scum is retained by the baffle wall and thus thickens in the box. All above-mentioned transitional constructions can be used analogously for all other means for gentle feeding from the clarifier (also with propulsion jet devices). If several supply and Eindickrinnen are assembled in a circle, the Schwimmschlammwassergemisch is not lifted by a pendulum motion, but by rotation over the raid edge of the link plate.

According to a further embodiment, an upstream, pivotable channel or a preceding scooping device can serve a lateral supply and thickening channel. In this case, the feed unit also lifts the scum mixture over the water surface. The thickening channel can here also be provided with a gradient to the SchwimmscUammenmahmevorrichtung. Again, the bottom of the thickening channel can be arranged partially or completely over the water surface. The amount of motive water can be significantly reduced or eliminated altogether. Again, the means for removing scum may be merely a pump or a skimmer.

In the embodiments in which at least a portion of a side wall of an open-top thickening channel is height adjustable, the device can be operated as follows:

The upper edge of a side wall of the thickening channel is displaced by means of a manual and / or motor drive under the water surface. As a result, the water surface is connected in the thickening channel with the water surface in the clarifier, so that scum, which is located on the water surface in the clarifier, can flow through the upper edge of the side wall in the thickening channel. If enough scum has been washed into the thickening channel, the upper edge is raised again. The water surface in the thickening channel is now separated from the water surface in the clarifier. In the thickening channel is now water, floating on the scum. If now by means of generating a fluid flow in the thickening channel a flow is generated, the scum also flows in this direction. By means of the removal of the alluvial scum can be easily removed. The longer the fluid flow acts on the scum, the more the scum is pushed together and its water content is reduced. If the floating sludge is largely removed inside the thickening channel, the upper edge of the side wall is moved back below the water surface in the clarifier and carried out the entire process again.

According to one embodiment, the thickening channel has at least one outlet opening in the side wall, which faces the side wall which is height-adjustable at least in sections or provided with at least one revealable opening. This may be an outlet opening, which is associated with means for closing the outlet opening. Further, this may be an outlet opening which is formed at a distance from the upper edge of the respective side wall, so that this side wall functions as a submersible wall. When supplying scum in the thickening channel can flow through the at least one outlet opening liquid and reduces the dynamic pressure and the filling of the thickening channel are facilitated with scum. An outlet opening closable with a closure can be closed after filling the thickening channel. This may be omitted if the outlet opening is formed in a baffle, which prevents the scum floating out through the thickening channel. With an openable and closable outlet opening, it is cost-effective if the closure of the outlet opening is moved with the same drive with which the other side wall is at least partially height-adjustable. The clear water is preferably returned from the thickening channel in the clarifier. For this purpose, according to one embodiment, the thickening channel communicates with the clarifier. The communicating connection is preferably designed so that no scum from the thickening channel can get back into the clarifier by the communicating compound. For this purpose, the communicating connection is preferably located at a distance from the upper boundary of the thickening channel, so that the thickening channel above the communicating connection laterally encloses the water surface with the floating sludge thereon. For this purpose, the communicating connection can open, for example, in a side wall and / or in the bottom of the thickening channel. The communicating connection may be in the bottom of a U or box thickening channel. A U-shaped thickening channel can consist exclusively of the two side walls. So that a forced flow arises in such a thickening channel, it may be advantageous if it has at least partially a bottom.

However, it is also possible to arrange the communicating connection at the level of the water surface in the thickening channel or to extend over the entire height of the thickening channel, if the communicating connection is designed so that scum can not or only slightly flow through it. This is the case, for example, if the communicating connection is formed by a gap that runs outward against the flow direction of the scum in the thickening channel. The gap may be formed by two overlapping portions of the thickening channel having different sized cross-sections. The scum is fed to the thus formed thickening channel in a region with a smaller cross-section and passes due to the effect of the fluid flow past the laterally covered gap in the region of the thickening channel, which has the larger cross-section, without the floating sludge flowing through the gap in the overlapping region of the two cross sections. Also, a thickening channel such as a wall or a part of a wall limiting sieve is a possible embodiment.

Alternatively, the clear water from the thickening channel can be returned to the clarifier by hydraulically connecting the thickening channel to the clarifier by adjusting the height of the top of a side wall or opening a side wall sideways. Another possibility is that the pure water runs back into the clarifier via an overflow edge of the thickening channel. This embodiment is particularly suitable when the means for gentle feed lift the scum in the thickening channel, so that the water level is located in the thickening above the water level in the clarifier. If the overflow edge is arranged behind the means for removal, in particular behind an over the entire width of the thickening channel extending gutter, the clear water behind the means for removal via the overflow edge can flow into the clarifier, without returning scum in the clarifier.

According to another embodiment, the means for gently feeding the scum on a gently pumping pump. This is, for example, a slow-running circular pump or a screw conveyor or a diaphragm pump or a piston pump or an eccentric screw pump or a peristaltic pump or a piston pump or a rotary pump or other suitable rotary positive displacement pump or paddling or a pumping station.

According to one embodiment, the means for gentle feeders on a paddle work, in addition to the upper edge of a side wall to the top edge is arranged parallel axis of rotation, wherein the paddles of the paddler dive in the course of a revolution in the settling tank and are moved past the upper edge of the side wall. In this embodiment, the upper edge of the side wall is preferably arranged approximately at the level of the water surface or just below. The paddling plant gently moves the scum from the settling tank over the upper edge of the side wall into the thickening channel. The paddling system prevents scum from returning to the clarifier, blocking access to the clarifier and encouraging scum to enter the thickening channel. Furthermore, a backflow of the scum from the thickening channel into the clarifier can be prevented by the side wall, since this can extend to the water surface.

According to a further embodiment, the paddle mechanism with the axis of rotation is laterally offset with respect to the adjacent side wall and on the adjacent side wall projecting into the settling tank guide which at least partially bounds the rotation area of the paddling in settling tank. The guide introduces the scum into the thickening channel and contributes to the gentle feeding of the scum.

The paddling machine can form the entire thickening channel together with an only partially formed thickening channel.

According to another embodiment, the paddle mechanism is integrated into a side wall or replaces it. The paddling system gently guides scum to the thickening channel and at the same time prevents scum from leaking out of the thickening channel. According to another embodiment, the paddle mill is arranged so that it forms a thickening channel between two paddles in a rotational position of the paddling. The paddle work is then arranged with its axis below the water surface and two adjacent paddles extend in at least one specific rotational position to slightly beyond the water surface, so that between the two paddles a thickening channel is formed. By turning the paddling of a paddle, which eventually limits the thickening channel, the scum is taken in this thickening channel. For example, with four paddles, the paddling plant, after rotation through 90 °, separates an area of the surface in the clarifier from the rest of the clarifier and thus forms a thickening channel. At the same time the paddle works promotes the rotation of the scum in the thickening channel formed by himself at the end of the rotation.

According to another embodiment, the means for gentle feeding a pumping station, which promotes water from the clarifier in the thickening channel. In this embodiment, the thickening channel can also be arranged outside the clarifier. Preferably, however, it is arranged inside the clarifier. Since the pump raises the water from the clarifier to a higher level, the adjacent side wall of the thickening channel can be designed so high that it separates the water level in Eindickkanal of the water level in the clarifier and scum from the thickening channel can not get back into the clarifier.

The water raised by means of paddling or scooping or other means for gentle feeding into the thickening channel can cause a flow in the thickening channel which transports the scum to the means for removal. Thus, the paddler or scoop can also form the means for generating a fluid flow. Devices with a paddler or scoop have the advantage that they can be operated continuously to deliver scum to the thickening channel. But they can also be operated discontinuously.

Preferably, the means for gently feeding scum in the thickening channel at the end remote from the end with the means for removal lead to. In this embodiment, the entire length of the thickening channel is used for the thickening of the scum.

The thickening channel can be designed as a channel with parallel walls as a conical or otherwise tapered channel. A curved thickening channel is also an option. Furthermore, the thickening channel can be designed so that it expands in front of the means for removing floating sludge. The extension of the thickening channel can be used as a collecting zone for scum.

Furthermore, the bottom of the thickening channel or of the immersed paddling forming the thickening channel may be inclined, i.e., inclined. be arranged with a slope. The bottom of the gutter or of the paddling plant can also preferably look out of the water level on one side, preferably on the driving water inlet side. In this case, the amount of motive water can be reduced or eliminated altogether.

In a further embodiment chicanes, advantageously raid plates can be used in the Eindickrinne. These raid plates can be made differently high, sometimes higher than the outer water level. If the thickening channel is arranged in the clarifier, it can only consist of the two side walls. For a forced flow, however, it may be advantageous if the thickening channel has a bottom at least in sections.

The means for removing floating scum can be designed differently. In particular, they may comprise a pump, a suction cup, a skimmer, a broaching screw, a paddle mill or a slotted rotary tube provided with at least one other radial opening. The ski gutter is preferably a ski gutter with a pump. This can be in a known manner an automatic ski gutter, a ski gutter with motor drive, a Skimrinne paddling, a hand-adjustable or preferred, since the water level in the clarifier and thus in the thickening channel can fluctuate around several centrimeters, adjusting itself to the water level and thus self-adjusting Be a ski gutter. Skimming gutters, in particular, can be used as removal means, as is known from DE 296 01 068 U1 or DE 43 15 110 A1 or DE 31 37 216 C2 or EP 0 748 248 B1 or in conjunction with a screw from EP 0 964 734 Bl are known.

As a means for generating a fluid flow, in particular, a blower can be used, which generates an air flow over the water surface in the thickening channel, which drives the floating matter to the means for removal. Preferably, the means for generating a fluid flow comprises a pump, the output of which has a connection to the thickening channel, the outlet of this connection being directed in the longitudinal direction of the thickening channel towards the means for removing floating sludge. By means of the pump, a liquid or driving fluid is pumped in the longitudinal direction of the thickening channel, which generates a flow in the thickening channel, which transports the floating sludge. The propellant is preferably removed from the clarifier. Further preferred is the pump fed with a liquid which is free or substantially free of floating mud, so that it does not smash any scum. For this purpose, the input of the pump preferably has a connection with the clear water in the wastewater basin. The pump removes the wastewater at a distance from the water surface in the clarifier, so that no or as little as possible scum is entrained, and at a distance from the ground, so that no or as little ground sludge is entrained.

According to one embodiment, the means for generating a fluid flow generate the fluid flow starting from the end of the thickening channel remote from the end with the removal means. In this way, a fluid flow over the entire length of the thickening channel can be generated, which transports the scum on the means for removal.

According to a further embodiment, the thickening channel, the means for gentle feeding, the means for removal and the means for generating a fluid flow are arranged on a clearing bridge of a clarifier. The clarifier may in particular be a round clarifier or a rectangular tank. The movement of the Räumerbrücke can support the gentle supply of floating matter from the clarifier into the thickening channel. This is particularly the case when the thickening channel has a height-adjustable or apparent side wall. When the side wall is lowered or opened, the floating sludge is displaced into the thickening channel by the movement of the scraper bridge. However, the movement of the Räumerbrücke also supports the supply of floating material to a paddler or a pumping station, if this is located on the Räumerbrücke. According to another embodiment, the means for gentle feeding and all or part of the thickening channel, the means for removing and the means for generating a fluid flow to the wall of a rectangular basin are arranged, which a sweeping device for moving SchwirnmscWamm in the clarifier to the means for gently feeding towards. In this embodiment, only the means for gentle feeding must be arranged in the settling tank or remove the scum from the clarifier. The thickening channel, the means for removal and the means for generating a fluid flow may be wholly or partly disposed inside or outside the clarifier.

According to a further embodiment, the thickening channel is arranged in the clarifier and has on the side facing the clearing device no side wall or a side wall whose height is less than the height of the opposite side wall, wherein the clearing device has a dozer blade at the end of the displacement movement for moving floating matter towards the thickening channel closes off the thickening channel on the side on which it has no side wall or has a side wall with a lower height than the opposite side wall, which is thus arranged below the water level. In this embodiment, the dozer blade pushes the buoyant material into the thickening channel and closes it at the same time, so that when the buoyant sludge thickens, no buoyant material returns to the septic tank.

According to a further embodiment of the thickening channel is disposed within the clarifier and communicating connected with a arranged outside the clarifier basin, in which the means for removing floating scum are arranged. The means for removing floating scum may, for example, be arranged in a shaft arranged on the outside of a clarifier. The invention will be explained in more detail with reference to the accompanying drawings of exemplary embodiments. In the drawings show:

Figure 1 is a device for thickening and clearing of floating matter on the Räumerbrücke a Rundklärbeckens in plan view.

Fig. 2 shows the same device in a front view;

Fig. 3 is a Eindickkanal with a height-adjustable side wall in one

Vertical section;

4 shows a thickening channel with two height-adjustable side walls in one

Vertical section;

Fig. 5 device for thickening and clearing of floating matter with a paddle in vertical section;

Fig. 6 the same device in plan view;

Fig. 7 shows a device with a Paddelwerk, the between two paddles a

Thickening channel forms in vertical section;

8 shows the same device in side view; a device with a Paddelwerk, which forms a U-shaped Eindickkanal together with an L-shaped thickening channel in vertical section; 10a shows a device for thickening and clearing floating matter with a scoop in a vertical section;

Fig. 10b shows a device for thickening and clearing of floating matter with a scooping plant which dips periodically into the sewage and transfers the scum mixture to a collecting and egg thickening channel;

Fig. 10c shows a device with a channel which dips periodically into the wastewater and at the same time forms the collection and discharge channel at the same time;

Fig. 10d side view of Fig. 10c, with an outlet box and an outlet, here combined with a non-return member;

Fig. 10e side view as lOd, but instead of an outlet with a

Reverse organ, here with a baffle wall and a raiding wall behind it;

FIG. 10f shows a device which combines a plurality of feed and thickening channels on a shaft; FIG.

10g shows a device similar to FIG. 10f with an axis of rotation below the

Water table;

11 shows a device for thickening and clearing floating matter in a rectangular basin in plan view; Fig. 12 raid plates in a paddling and in a gutter.

According to FIGS. 1 and 2, a trough-shaped thickening channel 3 is installed in a (round) clarifier 1.1 on a reamer bridge 2. The thickening channel 3.1 has side walls 4, 5, wherein the upper edge 6 of the side wall 4 can be lowered. For this purpose, for example, the side wall 4 can be folded around a hinge 7, which connects the side wall 5 with a bottom 8 of the thickening channel 3.1.

Thus, the upper edge 6 is temporarily pivotable below the water level 9 and thus under the scum in the clarifier 1.1 to accommodate S ch mud in the thickening 3.1. This happens during rotary movement of the Räumerbrücke 2 in a clockwise direction, so that the scum is flushed into the thickening channel 3.1.

At the wall 10 of the clarifier 1.1 adjacent to the outer end of the thickening channel 3.1, the output of a pump 11 is connected, the input of which opens below the water level 9 in the clarifier 1. The pump thus takes the clarifier 1.1 pure water and pumping it in the longitudinal direction in the thickening channel 3.1 into it. As a result, scum is transported in the longitudinal direction of the thickening channel 3.1 to the inner end thereof and compressed, so that its water content decreases.

At the inner end of the thickening channel 3.1 is an automatic ski gutter 12, which takes the Eindickkanal 3.1 thickened scum.

The bottom 8 ends at a distance in front of the ski gutter 12. The existing there opening 13 of the thickening 3.1 is communicating with the clarifier 1.1 connected. There, pure water can escape from the thickening 3.1 into the clarifier 1.1.

The pump 11 is located between the thickening 3.1 and wall 10 of the clarifier 1.1 for the sake of simplicity. Preferably, it is transported closer to the center of the clarifier 1.1 so that it does not interfere with the settling process in the clarifier 1.1. The connection from the pump 11 to the front wall of the thickening channel 3.1 can be made via a hose or a pipe.

At the Räumerbrücke 2 is mounted between a central shaft structure 14 and the Eindickkanal 3.1 Einweisschild 15 which directs the scum for thickening 3.1.

Fig. 3 shows a thickening channel 3.2 with a side wall 4, which has a height-adjustable section 4.1 with an upper edge 6, which is pivotable below the water surface 9 in the clarifier 1.

According to FIG. 4, a thickening channel 3.3 has two mutually opposite side walls 4, 5, which each have a pivotable upper section 4.1, 5.1. When applying scum both sections 4.1, 5.1 are opened to avoid an increased back pressure.

Shown in Fig. 4 is also a variant in which the side wall 5 is formed as a baffle 5.2 with a permanent opening 15 which is disposed below the water surface 9. The baffle 5.2 prevents the scum from leaking on this side when compacting. It allows the arranged below the water surface 9 opening water, so that a back pressure can be avoided. The baffle 5.2 may be present in addition to the movable wall 5.1 or instead of the movable wall 5.1.

FIGS. 5 and 6 show an exemplary embodiment with a paddle mechanism 16. The paddle mechanism 16 is associated with the side wall 4 of the thickening channel 3.4 with an upper edge 6. Paddlerwerk 16 and / or Eindickkanal 3.4 may have a fixed altitude or be adjustable in height. The axis 17 of the paddle 16 is aligned parallel to the upper edge 6 of the side wall. The side wall 4 has a guide 18 on which the paddle 19 pushes the scum into the thickening channel 3.4.

The paddler 16 transports scum over the top edge 6 into the thickening channel 3.4. The thickening channel 3.4 is preferably operated with a pump 11 (not shown) for producing a fluid flow in the longitudinal direction of the thickening channel 3.4. In principle, however, it also works without such a pump 11.

According to Fig. 7, the paddle factory 16 is arranged with the axis 17 of its shaft below the water surface 9. The paddle mechanism 16 is positioned so that in the illustrated rotational position, the two upper paddles 19 together with the axis 17 form a thickening channel 3.5. The paddle mechanism 16 is drivable by means of a rotary drive, not shown, which comprises, for example, sprockets and a chain made of plastic, from a motor arranged above the water surface 9.

The paddle mill 16 is held, for example, on a Räumerbrücke, not shown, which moves in the situation of Fig. 7 to the right. At the same time, the axis 17 rotates with the paddles 19 in the counterclockwise direction and scum accumulates in front of a surfaced paddle 19, wherein the paddles 19, for example, at low Floating sludge attack preferably at a speed along the water surface are moved, which falls below the speed of the moving in the opposite direction Räumerbrücke. The paddle 16 can also be temporarily stopped when only a paddle 19 protrudes from the water, so that scum accumulates in front of this paddle 19. Finally, the paddler 16 comes into the rotational position, which is shown in Fig. 7. In this rotational position, in which the paddle 19 limit the thickening channel 3.5, the paddle 16 stops temporarily.

Then the propellant can be switched on. It can be supplied directly via a cover plate 20 or a slide plate, which extends on one end side of the paddle 16 at preferably short distance from the paddles 19 between the two upper paddles in the rotational position of Fig. 7 on both sides of the water surface. The fluid flow may be pumped directly through a hole, not shown, in the end plate 20, to which the outlet of the pump is optionally connected via a pipe or hose. However, the fluid flow can also be fed through a larger opening 21 of the end plate 20, which is surrounded on the side remote from the paddle 16 side by an open-topped box 22, is fed into the top of propellant. These embodiments are shown in Figs. 7 and 8.

In Fig. 8, a possible embodiment is indicated, according to which the fluid flow is introduced in the direction of arrow 23 between the two paddles 19. In this embodiment, the paddle 16 may be provided on the adjacent end face with a cover plate which is firmly and sealingly connected to the paddles 19 and co-rotates. The paddle work 16 of Fig. 7 can also be operated without a pump or with a pump of reduced power, if the axis 17 is inclined at an angle to the water level and / or the paddles 19 have bends at the ends.

In the aforementioned embodiments, a Skimrinne can be arranged on the other end face of the paddle 16, the 19 bridged the rotational position shown in FIG. 7 and subtracts the stranded by the propulsion jet compacted scum there the distance between the paddles. The skim trough may be positioned directly at the end of paddling 16. But it can also ensure a Überleitkonstruktion between Paddelwerk 16 and the ski gutter that no scum can flow out laterally on the way the scum from paddling 16 to Skimrinne.

According to FIG. 9, a paddle 19 of a paddling unit 16 together with a cross-sectionally L-shaped arrangement of a base 8 and a side wall 5 forms a U-shaped thickening channel 3.6. Here, the paddle 19 replaces the sidewall 4. The paddler rotates clockwise in the situation of Fig. 8, so that a paddle 19 dipping into the water pushes scum to the left into the L-shaped area between the floor 8 and the sidewall 5. In the illustrated position, in which the paddle 19 dips approximately perpendicular to the water surface and optionally touches the bottom 8, the paddling is advantageously stopped and turned on the fluid flow, which moves the scum in the thickening channel 3.6 perpendicular to the drawing direction and compacted. Here, the scum is transported to a means not shown for removing scum, for example to a ski gutter, which subtracts the scum from the thickening channel 3.6. According to FIG. 10a, a pumping station 3.7 is associated with a pumping station 24, which gently lifts wastewater from a clarifier 1.1 into the thickening channel 3.7. The mixture of scum and water is taken up by Schöpfrinnen 25.1 of the scoop 24.1 and transferred parallel to the axis of the pumping station 24.1 in the thickening channel 3.7. If the scoops 25.1 are closed only at one end face of the pumping station 24.1, the mixture of scum and water can also be passed over the open end face of the scooping 25.1 in the thickening channel 3.7. The device can optionally be operated with or without a pump 11 for generating a fluid flow in the thickening channel 3.7.

According to FIG. 10b, a thickening channel 3.8 is assigned a periodically operating pumping station 24.2. The scoop 24.2 has a single scoop 25.2, which is hinged to the upper edge of a side wall 4 of the thickening channel 8. The thickening channel 3.8 or the bottom 8 of the thickening channel 3.8 can also be arranged in places so high (possibly above the water level) that a pump 11 for generating a fluid flow in the thickening channel 3.8 can be dispensed with.

FIG. 10c shows, in cross-section, a channel 26 which dives in periodically on one side and simultaneously assumes the function of a feed channel 25.3 and a thickening channel 3.9. The pivot point for the channel 26 can be chosen arbitrarily. However, only parts of the channel 26 (e.g., floor 8 and front side wall 4) may be moved. The channel 26 can also be moved vertically. In this case, it is recommended to make the rear side wall 5 of the channel 26 higher. The bottom 8 is preferably provided with a slope towards the outlet.

Furthermore, an outlet-side end plate 20.1 and a link plate is shown, to which the groove 26 preferably with frontal rubber sealing strips slides. After passing through the end plate 20.1, the floating sludge is conveyed between guide plates 27, 28 (see Fig. 10d) which are perpendicular to the plane of the drawing, to the means for removal. 10d shows the periodically submerged groove 26 in side view. The lateral guide plates 27, 28 are extended by a bottom 29 and a rear back wall 30, so that together with the end plate 20.1, a box 31 is formed. An outlet, here provided with a backflow preventer 32 (advantageously in the back wall 30) ensures that excess water can drain off. Thus, only one pump can be used here as Schwimmschlammenmahmeeinrichtung. The device can also be operated here, depending on the height arrangement either with or without a pump 11 for generating a fluid flow in the thickening channel 3.9.

10e shows the same situation as 10d, but a baffle 32 is used here for the restraint of the floating matter. The excess water can flow back into the basin via the rear wall, which forms a raid wall 30 here.

10f shows a summary of a plurality of grooves 26.1, which respectively form feed channels 25.4 and thickening channels 9.10, in an arrangement rotatable about an axis of rotation 33, so that here the floating sludge removal takes place by turning the system. Each trough 26.1 is formed by a paddle with an edge at the outer end of the paddle, each trough 26.1 at the inner end of the paddle being bounded by the paddle of the adjacent trough 26.1. In Fig. 10f the axis of rotation 33 is above the water surface. But it can also be below the water level, as shown for example in Fig. 10g. The grooves 26.1 are shown in a first rotational position in dash-dotted lines and in a further rotational position in solid lines. In the first rotary position, all four channels 26.1 are shown and in the second rotational position only two of the four grooves 26.1, one of which is assigned to the raid edge of the link plate 20.1.

According to Fig. 11 shows a (rectangle) clarifier 1.2 with an arrangement of a thickening Schwimmstoffentnahme in rectangular tanks. At one end of the clarifier 1.2, a thickening channel 3.9 is arranged in the form of a ski gutter or a skim tube, which extends substantially over the entire width of the clarifier 1.2.

The mixture of scum and water is pushed by a not shown clearing element to the thickening 3.9 out and flows into the thickening 3.9 when it is open to the clarifier 1 out. When the scum is thrown into the thickening channel 3.9, the water surface in the thickening channel 3.9 is separated from the water surface in the clarifier 1.2.

A pump 11 now effects a flow in the longitudinal direction of the thickening channel 3.9, which transports the scum to means for removing scum in the form of a Sldmrinne 12, which are arranged outside of the clarifier 1.2 in a mounting bay 34. The attachment bay 34 and the clarifier 1.2 are communicating with each other below the water surface.

The longer the pump 11 is in operation, the more the floating sludge in the thickening channel 3.9, which flows towards the skim channel 12, becomes more compact. The water can get back through the at the end of an opening 13 in the bottom 8 of the thickening 3.9 in the clarifier 1.2. Additionally or instead, the pure water can be returned by the communicating connection between cultivation bay 34 and clarifier 1.2. As a result, the bottom 8 of the thickening channel 3.9 can also be completely closed. In principle, the Schwimmstoffentnahrne or Skimrinne 12 can also be arranged within the clarifier 1.2. The ski gutter can be arranged in particular in the thickening channel 3.9.

If several clarifiers are arranged side by side, which are connected to each other with their Eindickkanälen 3, it may be sufficient if the Eindickkanäle 3 cooperate with a single means for removing Schwimmschlamrn to which the scum from all thickening channels 3 is supplied.

12 shows baffles 35 (here raid plates) on the left in a gutter 3.10 and in the middle and on the right in a paddle mill 16.1 similar to FIG. 7 (drawn here with a square tube as a central shaft), which cause the cross section for the flow, which is generated by a propulsion jet pump, downsized and thus the pump power can be reduced. The raid plates 35 can be made different and arbitrarily high. The motive water can be supplied to the front side and / or along the channel 3.10 or 3.5. It also baffles conceivable that narrow the cross-sectional width to get a higher propellant water velocity.

Claims

1. Device for removing and thickening and clearing of floating matter from the surface of a wastewater in a clarifier (1) with

a thickening channel (3),

Means for gentle feeding (4, 16, 20) of floating matter from the clarifier (1) in the thickening channel (3),

Means for removing scum at or before one end of the thickening channel (3) and

- Means for generating (11) in the longitudinal direction of the thickening channel (3) on the means for removal (12) directed to fluid flow in the thickening channel.

2. Device according to claim 1, wherein the means for gentle feeding (4) at least one at least partially height-adjustable side wall and / or at least one provided with at least one opening with an open and closable closure side wall of the settling tank (1) arranged thickening channel ,

3. Apparatus according to claim 2, wherein at least one side wall (4) of the thickening channel at least partially with respect to the remaining parts of the thickening channel (3) upwards and / or downwards and / or outwardly and / or inwardly displaceable.

4. Apparatus according to claim 3, wherein the side wall (4) at least in sections about a horizontal and / or vertical joint (7) is pivotable and / or in the vertical direction is adjustable.

5. The apparatus of claim 2, wherein the means for gentle feed (4) means for vertically displacing and / or pivoting about a horizontal axis of the thickening channel (3).

6. Device according to one of claims 2 to 5, wherein the thickening channel (3) in the side wall, which faces the at least partially height-adjustable side wall, at least one outlet opening (15) and / or an additional baffle (5.2) include.

7. Device according to one of claims 1 to 6, wherein the thickening channel (3) communicating with the clarifier (1) is connected.

8. Apparatus according to claim 7, wherein the thickening channel (3) is communicatively connected to the clarifier (1) at a distance from its upper limit.

9. Device according to one of claims 1 to 8, wherein the means for gently feeding a scooping device (24.1, 24.2).

10. Device according to one of claims 1 to 9, wherein the means for gentle feeding (25.3, 25.4) at the same time the thickening channel (3.9, 3.10).

11. Device according to one of claims 1 to 10, wherein the means for gentle feeding a paddle work (16).

12. The apparatus of claim 11, wherein the paddle (16) next to the upper edge (6) of a side wall (4) is arranged parallel to the upper edge of rotation axis (17), wherein the paddles (19) of the paddle (16) in course one turn into the clarifier (1) and move past the upper edge (6) of the side wall (4).

13. The apparatus of claim 12, wherein the paddler (16) with the axis of rotation (17) laterally with respect to the adjacent side wall (4) is offset and on the adjacent side wall projecting into the settling tank guide (18) is present, the rotation area of paddling (16) in the clarifier (1) at least partially bounded.

14. The apparatus of claim 11, wherein the paddle work (16) in a side wall (4) is integrated or replaced.

15. The apparatus of claim 11, wherein a paddle (16) is arranged with its axis of rotation below the water surface and in at least one rotational position with two adjacent paddles (19), which protrude partially from the water surface, a thickening channel (3) laterally, wherein the paddling (16) at the same time forms the means for gently feeding scum into the thickening channel (3).

16. Device according to one of claims 1 to 15, wherein the means for gentle feeding a pumping station (20), which promotes water from the clarifier (1) in the thickening channel (3).

17. Device according to one of claims 9 to 16, which has no means for generating a fluid flow with a pump.

18. The apparatus of claim 9, 10 and 16, which have a box (31) downstream, in which the excess water can drain and which has a backflow preventer (32), which prevents a backflow into the box (31), or a raid wall (30) with a previously arranged in the box baffle (32).

19. The apparatus of claim 16, wherein the box (31) with the groove (26) is moved.

20. Device according to one of claims 1 to 19, wherein the means for gentle feeding (20) supply the scum the thickening channel (3) starting from the end with the means for removal (12) remote end.

21. Device according to one of claims 1 to 20, wherein the means for removing floating scum have a Skimrinne (12) or other Abskimvorrichtung.

22. The apparatus of claim 21, wherein the Skimrinne (12) is a self-adjusting Skimrinne.

23. Device according to one of claims 1 to 22, wherein the means for removing floating scum have a de-worm, a paddle mill or a rotary tube or a suction device.

24. Device according to one of claims 1 to 23, wherein the means for generating a fluid flow having a pump (11) having a connection with the Eindickkanal (3), which is directed in the longitudinal direction of the thickening channel (3) to the means for removing (12) from scum to.

25. The apparatus of claim 24, wherein the input of the pump (11) has a connection with the pure water in the clarifier (1).

Device according to any one of Claims 1 to 25, in which the means for generating a fluid flow (11) produce the fluid flow starting from the end of the thickening channel (3) remote from the end with the means for removal.

27. Device according to one of claims 1 to 26, wherein the Eindickkanal (3), the means for gentle feeding (4, 16, 20), the removal means (12) and the means for generating a fluid flow (11) moves at a Räumerbrücke (2) of a clarifier (1) are arranged.

28. Device according to one of claims 1 to 27, wherein the means for gentle feeding (4, 16, 20) and all or part of the thickening channel (3), the means for removal (12) and the means for generating a fluid flow ( 11) in the rectangular tank (1.2) are arranged, that a clearing device for displacing floating in the clarifier (1.2) to the means for gentle feeding (4, 16, 20) has out.

29. The apparatus of claim 28, wherein the thickening channel (3) in the clarifier (1.2) is arranged and on the side facing the clearing device has no side wall or a side wall (4) whose height is less than the height of the opposite side wall (5), wherein the clearing device has a plow blade, which at the end of the displacement movement to Moving of floating material to the thickening channel (3) closes off the thickening channel (3) on the side on which it has no side wall or a side wall (4) with a lower height than the opposite side wall (5).

30. The apparatus of claim 28 or 29, wherein the thickening channel (3) within the clarifier (1.2) is arranged and communicating with a arranged outside the clarifier basin (22) is connected, in which the means for removing (12) of scum are arranged.

31. Device according to one of claims 1 to 30, wherein in the thickening channel (3) harassment (35) and / or raid plates are located.