DE19956022B4 - Rainwater basin with sewage overflow, in particular rain cyclone basin, and method for operating a rain basin - Google Patents

Abstract

rainwater tanks (1) with a rainwater inlet (2) and a sewage overflow (9, 10, 11, 15), characterized in that the rainwater supply line (2) after the basin interior (3) towards the rainwater inflow influencing Partition wall (4) and the sewage overflow from the basin interior guided by the partition wall (4) Pipes (9) is formed.

Description

The The present invention relates to a rainwater basin, in particular rain cyclone basin with a rainwater supply and a sewage overflow, as well as a procedure to operate a rain basin.

rainwater tanks are used to ensure proper rainwater treatment during rainfall events to enable. Usually is rainwater from settlement areas in a sewage treatment plant cleaned before it is fed to a receiving water. In precipitation events, particularly strong precipitation events, the capacity of the sewage treatment plant is sufficient not off to the on the road surfaces and / or Houses roofs collected Direct rainwater immediately to a proper clarification. It is therefore usually Rainwater collection basin provided to collect the rainwater and gradually to a sewage treatment plant derive. However, these buffer memory can not for reasons of cost trained so big they will to record any precipitation events, including those that are very strong and persistent, are dimensioned. As a rule, therefore, a multi-stage discharge intended. This under normal conditions and with low rainfall rainwater accumulating per unit of time will pass through the rainwater basin through a sewage treatment plant fed. For stronger ones Precipitation events, the level in the rain basin continues to rise on, and over a sewage overflow threshold the excessively rising water is discharged directly into a receiving water. By storing the rainwater in the rain basin is a partial deposition of contaminants in the rainwater basin. For the relief even stronger Precipitation events usually become a separation structure provided from which already in the supply area in front of the rainwater tank too big Drain water into the receiving water.

A rainwater basin according to the preamble of claim 1 is known from DE 195 11 008 A1 known. This shows a sieve arrangement for the removal of contaminants and possibly bulky goods in circular stormwater discharge basin, where functionally seen initially a treatment plant discharge takes place.

at This plant is overflowed very heavy precipitation through concentric around the middle of the tank arranged retention screens that of floating suspended matter by a rotating scraper must be freed. Of the Scraper is driven by paddling, by the incoming water be set in motion.

These Arrangement is not only structurally complicated because it is next to a comparatively expensive screen also moving and thus particularly prone to failure parts but the sedimentation effect of the basin on incoming water is also in need of improvement. This is because on the one hand water directly from the rainwater supply flow to the seven can, on the other hand, because the paddles move through the pelvis the actually desired Vortex formation around the middle of the pelvis disturb by many more smaller vortices are generated.

The The object of the present invention is to be more compact Construction a structurally simple, less prone to failure rain basin with good cleaning effect specify.

In addition, should a method for operating a rain basin can be specified.

The solution this task takes place in objective terms by the Rainwater basin with the features contained in claim 1, and in procedurally by the features in claim 13.

preferred embodiments can be found in the subclaims.

One The basic idea of the present invention is thus to be Rainwater tank with a rainwater inlet and a sewage overflow to propose, with the rainwater supply to the basin interior towards the rainwater inflow influencing partition includes and the sewage overflow from the tank interior guided by the partition wall Rohrlei lines is formed. The pipelines can in particular have a round, rectangular, have square or square cross-section.

By doing the rainwater supply to the pool interior provided with a partition wall it will be possible To build up the arrangement very compact and yet the inflow also defined to effect. At the same time no increased construction costs for the Klärüberlauf required, as the piping easily through the partition too to lead are without the Partition costly with rising slots or the like must be provided as in the generic state of the art. Also can be about the Arrangement of pipe ends and the number of planned pipes the desired hydraulic conditions in the pelvis slightly and possibly after pelvic completion still adjust problem-free, which, for example, with changing Settlement sizes in new housing areas he wishes can be.

In a preferred embodiment the pipelines will open in an area flowed by a basin overflow. Here, the effluent from the pipes water can be fed directly to a receiving water, as well as the flowing over the pool overflow water.

It is particularly preferred when compared to the basin overflow Partition to the outside arranged pool overflow wall is provided, whereby the rainwater supply in the pelvic area is designed as a feed trough. This way can through simple dimensioning of the wall opposite the partition wall as a lower basin overflow wall without additional Measures in a very compact way a pool overflow area can be realized, the same time a sewage overflow includes. The pool overflow can be curved in particular be and / or be taken to a trough, from which water is led into the receiving water.

Of the Supply trough itself is in a preferred embodiment go into a dry weather channel, which to a sump area or a drainage channel of the pelvis leads. In this way, even under low precipitation conditions, that this Basin is not affected by deposits and the like.

The Partition is poured in a preferred embodiment of a castable material, in particular made of concrete. The pipes can be fixed to the partition wall be connected. A first possibility the fixed connection is the piping inside the basin to anchor on the partition or otherwise fasten and then through openings to pass through the partition, which surround the tube fluid-tight. To a pollution However, by avoiding alluvial agents, it is preferred if the pipes at least partially poured into the partition are, and in particular almost exclusively projecting the opening area. at it is desirable to have pipelines poured into the dividing wall in a straight line through an opening in the top of the partition to get close to this, about for cleaning purposes. For this purpose, an access can be provided from above.

The Pipeline inlet openings are in a preferred embodiment pointing down, so that floating Contaminated cargo, including floating light liquids, etc. retained The rain basin is preferably designed as a rain cyclone basin.

It is further preferred, the pipelines, an inflow of the taken in the first quadrant assumed in the fourth To arrange quadrants. By adjusting itself in the pool filling Radialabströmung Floats and suspended solids are transported to the middle of the tank and reach not in the sewage overflow.

The Invention will be described below with reference to an embodiment with reference closer to the drawing explained. In this shows:

1 a rain cyclone basin according to the present invention from above

2 the rain cyclone basin of 1 in section along line AA.

To 1 includes a generally with 1 designated, designed as Regenzyklonbecken rainwater basin 1 a rainwater supply 2 , which is connected to the sewage network of a settlement area or the like and into the rainwater basin inside 3 leads. The supply line 2 points to the basin interior 3 one in the entry area 2a straight and following curved partition 4 on and through the latter and one on the partition wall 4 opposite side arranged pool overflow 5 educated.

The supply line 2 directs the rain cyclone basin 1 Water in the first quadrant to such that through the curved partition 4 and the concentrically arranged outside pool overflow 5 a tangential inflow channel 6 is formed. The tangential inflow channel 6 can in its bottom area in a dry weather chute 7 go over to the drain 3b leads into the center of the rainwater tank interior. The pool overflow 5 outside is a pool overflow trough 8th assigned, which via a derivative 15 is relieved in a receiving water. The pool overflow 5 , the basin overflow trough 8th and the rainwater basin 1 form a compact unit.

The rainwater tank inside 3 is a rain cyclone basin with sloping bottom surfaces 3a formed over which the water a drainage area or swamp 3b is fed, which leads to a sewage treatment plant (not shown). Downtown 3c of the rainwater tank interior 3 a shaft can be provided in which a drain throttle or a pumping station can be installed.

The partition 4 is made of concrete, in which according to the invention pipelines 9 are poured. The pipelines 9 lead in the partition 4 down, run under the inflow 6 and open to the ground in the basin overflow trough 8th , These are to the rainwater tank interior 3 open, with the openings facing down to An sets 10 are provided, which are pulled down by a certain distance. The approaches 10 are near the wall 4 arranged, and the highest point 13 every tube bottom 9 lies below the overflow edge 14 the basin overflow 5 , At the top are the inside of the partition 4 guided pipe sections via a ventilation opening 12 accessible.

The Rain cyclone basin of the present invention operates as follows.

In normal weather conditions get over the supply line 2 and the dry weather chute 7 comparatively small amounts of water in the sump 3b and are discharged from there to the sewage treatment plant.

With incipient short rainfall, the rainwater tank inside fills 3 then via the supply line 2 at. Thereafter, the precipitation gradually flow to the treatment plant, with the rainwater inside 3 has a storage or buffering effect.

For very heavy rainfall, which due to long duration and / or high intensity in the rainwater tank inside 3 can no longer be stored, the water in the rainwater tank interior rises 3 gradually until it crosses the threshold 13 the sewage overflow responds through the openings 11 , the approach 10 , the pipeline 9 and the process 15 is formed.

The downward facing opening 11 Prevents that floating lightweight materials such as low-volatile liquids, Styrofoam, etc. can get over the sewage overflow in the receiving water. This is at best for the very small amounts of light liquids, etc., conceivable during the initial rise of the water in the pipes 9 can occur.

The arrangement of the openings 11 near the partition 4 causes at the same time that the rainwater and / or wastewater contained in the transported dirt and suspended matter in any extent negligible extent in the approaches 10 the sewer overflow can occur, since the partition near the arrangement causes reduced flow velocities along the partition due to the boundary layer effect. The flow rate reduction is further enhanced by the arrangement of the pipelines 9 in the flow shadow of the straight-line introduction 2a , Moreover, since the suspended solids and the like on the way from the inlet-side first quadrant to the output-side fourth quadrant sink for the most part or are transported through the settling in the pool radial flow to the middle of the pool, an undesirable discharge of dirt load is largely excluded.

If the supply quantities continue to increase, then finally the overflow threshold is reached 14 of the basin overflow 5 overflowed and the incoming water passes directly into the basin overflow trough 8th and from there into the derivative 15 or directly into the receiving water. As soon as the quantities of water fed in decrease, the order of swell response will reverse, until eventually all the remaining water through the rainwater drainage area 3c flows to the treatment plant.

It be mentioned the existence Cymbal overflow trough not is imperative, especially if the rainwater basin can be arranged close to a receiving water and / or the overflowing water from the basin or the sewage overflow directly or can be supplied by a derivative in the receiving water. So can the Beck overflow trough omitted if the receiving water directly up to the area of the pool overflow threshold or the tube outlet openings of the sewage overflow guided becomes.

It be mentioned the existence Shaft is not mandatory.

It be mentioned that the Education as Regenzyklonbecken not absolutely necessary, but probably is advantageous.

Claims (13)

Rainwater tanks ( 1 ) with a rainwater supply line ( 2 ) and a sewage overflow ( 9 . 10 . 11 . 15 ), characterized in that the rainwater supply line ( 2 ) to the interior of the basin ( 3 ) towards a rainwater inflow affecting partition ( 4 ) and the sewage overflow with the inside of the basin through the partition wall ( 4 ) guided pipelines ( 9 ) is formed. Rainwater tanks ( 1 ) according to claim 1, characterized in that the partition wall ( 4 ) is designed for tangential rainwater supply. Rainwater tanks ( 1 ) according to claim 1 or 2, characterized in that the pipelines ( 9 ) in one of a basin overflow ( 5 ) flowed area ( 8th ). Rainwater tanks ( 1 ) according to claim 3, characterized in that as basin overflow ( 5 ) one opposite the partition ( 4 ) arranged to the outside basin overflow wall ( 5 . 14 ) is provided to form the rainwater supply in the pelvic area as Zuleitungstrog. Rainwater tanks ( 1 ) according to claim 4, characterized in that the feed trough is in a dry weather flume ( 7 ) opens. Rainwater tanks ( 1 ) according to one of the preceding claims, characterized in that at least the partition wall ( 4 ) of concrete or other material castable by molding, and the pipelines ( 9 ) are firmly connected to this. Rainwater tanks ( 1 ) according to claim 6, characterized in that the pipelines ( 9 ) at least partially into the partition wall ( 4 ) are poured. Rainwater tanks ( 1 ) according to claim 7, characterized in that the in the partition ( 4 ) cast-in pipes ( 9 ) accessible from above ( 10 ), in particular in a straight line. Rainwater tanks ( 1 ) according to one of claims 1 to 8, characterized in that the pipelines ( 9 ) Inlet openings ( 11 ) pointing downwards. Rain basin according to one of claims 1 to 9, characterized in that the pipelines ( 9 ) Inlet openings ( 11 ), which are arranged close to the partition wall. Rainwater tanks ( 1 ) according to any one of the preceding claims, characterized in that it is designed as a rain cyclone basin. Rain cyclone basin according to claim 11, characterized in that the pipelines ( 9 ), are arranged at inflow of the incoming water in the first quadrant, in the fourth quadrant. Method for operating a rain basin with a Rainwater supply and a sewage overflow, the rainwater supply after the pool inside a rainwater inflow influencing Partition has and the sewage overflow formed with the inside of the pool through the partition guided pipes is, with the following procedure steps: The rain water becomes the Basin interior by a demarcated by the partition area supplied and at least a part of the pool no longer to be stored Water is over the pipes routed through the partition derived.