DE1812478C3 - Device for clearing floating sludge in a clear pool - Google Patents

Description

35

The invention relates to a device for .Swimmschlammräumung in a clarifier with at least one collecting channel arranged at the height of the liquid level and movable over its surface, on the front side in the direction of movement one extends over almost the entire length the spillway extending overflow edge is arranged adjustable in height and with a collecting container connected is.

Such devices are found, for example, in sewage settling tanks to remove the water use of floating sludge accumulating in wastewater treatment.

In a known device according to German Patent I 014 486 is one over the whole Räumbreite continuous, rotatable about its longitudinal axis collecting gutter provided on her End is provided with a drainage opening. If sludge forms, the channel is tilted, whereby the The emptying opening is raised above the water level. The overflow edge of the device is, however continuously formed and can only be lowered or raised as a unit. When clearing can therefore Water can enter the collecting channel along the entire length of the overflow edge, although the channel to be cleared Floating sludge collects only in front of sections of the clearing device. This gets a lot Lots of water in the collecting channel and dilutes the floating debris to be removed. The broaching process will accordingly uneconomical.

The invention is based on the task of developing this known construction so that the concentration of the drained swimming mud increased and the broaching process is correspondingly more economical.

This hub is solved according to the invention by that the ^ overfall edge of the collecting gutter in independent is divided from each other raisable and lowerable sections.

This has the advantage that the floating sludge can be removed at any point at any time the width of the pelvis can take place, but that at any point in time only over a small part of the width of the pelvis Floating sludge and thus also water needs to be removed. This is desirable to the .Schwimmschlammräumung necessarily associated with the water extraction from the To keep the basin as small as possible.

In an embodiment of the invention which is preferred because of its particularly simple construction the gutter is divided into total channel sections, the ones in the front in the direction of movement Edges form the overflow edge and which can be tilted about a common horizontal axis. Through Tilting of the individual channel sections can be used as the overflow edge at the respectively desired point The edge of the channel can be raised and lowered relative to the water level. The one in the direction of movement rear edge of each channel section is advantageously c designed as a collecting wall protruding above the water level in every tilted position.

Around all channel sections by connecting pipes to be connected with each other and to be connected to a common outlet line, are the Channel sections connected by pipe sockets, which are used as trunnions for tiltable storage of the Gutter sections are formed on supports carried by a scraper bridge. Form this way the individual channel sections practically a continuous channel, which at a suitable Place is connected to the exhaust pipe.

An embodiment of the invention is explained below with reference to the drawings.

F i g. 1 shows a vertical partial section through a device provided with the clearing device according to the invention Round basins for wastewater treatment;

Fig. 2 shows a plan view of the clearing device;

FIG. 3 shows a section along the line IU-III of FIG. 1, on a larger scale;

Fig. 4 shows a detail of the clearing device in section along the line IV-IV of F i g. 3

F i g. 1 shows a round clarifier 10. The wastewater to be treated is fed through an inlet pipe 12 guided into the interior of an intake structure 14 and from there through with flow-damping baffles provided outlet openings 16. 18 introduced into the basin. Divorce when operating the pelvis the pollutants contained in the wastewater as bottom sludge and floating sludge from the water away. The bottom sludge is conveyed through a suitable scraper (not shown) into a central funnel-shaped sludge sump 20 and sucked off from there. The floating sludge collects on the water surface 21 and is means taken from the clearing device described below from the basin. The cleaned Wastewater can be channeled through channels 22 at the circumference of the pool.

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those from a level located between the scum zone and the bottom sludge zone Lead obliquely upwards into a clear water channel 24 surrounding the pool circumference, into this channel exit and is sucked off from there and fed to a receiving water.

The Sehwimmschlammräumvorrichtung is carried by a scraper bridge 26, which the basin spanned radially. It is rotatable on the inlet structure 14 in a pivot bearing 27 and on the basin io Hingen, the aul The crown is movably mounted on rollers 28. By means of Üherl'allkanten a (not shown) drive, the Räumerbrücke are rotated around the pool axis, so that the clearing device attached to it with each The entire pool surface is coated once around 15 times. The circulation always takes place in the same Direction, for example in Fig. 2 clockwise.

On the front side of the scraper bridge 26 in the direction of rotation are at the level of the water level open channel sections 30 attached. A section through a single groove cut is shown in FIG. 3. Each channel section has a leading edge serving as a fall-over edge '32 and is around the horizontal one Axis 34 rotatably mounted, so that by tilting the channel section 30 about this axis, the leading edge can be raised above the water level 21 or lowered below it.

The channel sections 30 are attached to supports 36 hanging down from the scraper bridge 26 by means of pivot bearings 38, one of which is shown in section in FIG. 4 is shown. As can be seen, the bearing journals are with which the channel sections 30 are mounted in the pivot bearing 38, designed as a pipe socket 40, which establish a connection between two adjacent channel sections.

For the optional tilting of each channel section 30, there is a lever arm 42 on each channel section 30 (F i g. 3) attached, the od by means of a rod 44 hinged at its end, a cable pull the Räumerbrückc 26 can be operated from. 4 "ofe To adjust the tiltable channel sections and length and to fix them in the desired position Individual handwheels 46 d <: rn, each actuating a lifting rod, can be tilted on the scraper bridge be provided. It goes without saying that there is also an indentation

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1 sheet of drawings

Claims (4)

Paienianpriidie: 1. Apparatus / for lamb removal in a clarifier with at least one in Height of the liquid level, disordered and movable collecting channel over its surface, mi whose front side in the direction of movement extends over almost the entire length of the collecting channel Ereckende overflow edge vertically j ° adjustable isi and which is connected to a collecting container. characterized, that the overflow edge (32) can be raised and lowered independently of one another Sections is divided. 2. Device according to claim I. characterized in that dal 'the collecting channel is divided into total channel sections (30), whose direction of movement edges lying in front form the overflow edge (32) and those around a common one horizontal axis (34) are tiltable. 3. Apparatus according to claim 1 or 2, characterized in that the in the direction of movement rear edge of each channel section (30) as one in each tilting pitch above the water level protruding collecting wall is formed. 4. Apparatus according to claim 2 or 3, characterized in that the channel sections (30) are connected by pipe stubs (40), which act as trunnions for tiltable storage of the channel sections (30) on support * η (36) carried by a scraper bridge (26).