DE19715619C1 - Water treatment assembly removes oil and sedimentary impurities from street - Google Patents

Abstract

An assembly treats water runoff from esp. street surfaces or areas of hard standing. The novelty is that: (a) the assembly has a sub-surface e.g. multi-chambered shaft (1) let into the ground (16) and incorporating a sludge trap (2) with a water inlet (5); discharging to through an overflow (7) to (b) an oil separator chamber (3) and a drainage pit (4); (c) the pit (4) linked is on one side to the oil separator chamber (3) and a self-operated closure (9), and on the other with a soakaway shaft (3) discharging to the soil (16).

Description

The present invention relates to a device for cleaning fixed Roads or squares of surface water, especially rainwater.

Mainly due to the increasing sealing of floor areas and the result associated drainage of surface water into the sewage system is increasingly decreasing the groundwater level with the resulting ecological very negative consequences with regard to the effects on the vegeta tion etc.

On the other hand, the surface water is drained directly into the ground So far not advisable, because of the contaminants that are washed away, especially from Leaking oil from motor vehicles, too much pollution of the earth ches and especially the groundwater would occur.

From DE 296 01 181 U1 a device is known which has a settling device for oil or petrol. However, this is not an absolutely safe cleaning of the collected surface water guaranteed.  

Devices for cleaning surface water are also known, however mainly used in the commercial sector, i.e. where the surface water is highly contaminated with oils or other substances, for example in the area of petrol stations, car washes or the like

However, these devices are very expensive, especially since both Sludge trap and an oil separator are designed as separate components, which are in Series are connected to each other and for their installation separate construction pits are required.

For cost reasons, such systems are therefore not suitable for the stated purpose net.

The present invention is therefore based on the object of a device create a safe with little design effort and therefore inexpensive Cleaning of surface water ensures that this is immediate without hesitation can be drained into the ground.

This object is achieved by a device which has the features of the claim 1 has.

Such a device is first of all very inexpensive to manufacture and too instal lieren, because the functionally relevant parts in a relatively small dimension unit, for example, a concrete shaft are summarized.

Basically, preparation for excavation is sufficient for installation in the ground to provide the seepage layer on site, preferably consisting of sand and gravel is.

For reasons of stability, the seepage layer can be surrounded by concrete rings on the then the mentioned shaft is put on.

The size of the shaft depends on the expected amount of waste water and is variable in both height and diameter.

The oil separation chamber can also be adapted to local requirements.

According to an advantageous embodiment of the invention, the oil separation chamber is included a coalescence separator, in which the fine oil flows through add drops to a coalescence filter made of technical fabric and unite into a larger unit, which then drifts to the surface. When reached  of a maximum oil storage quantity, the separator automatically closes the overflow to the septic chamber.

By regularly measuring the oil layer thickness and / or by installing a Optical or acoustic oil warning device must be properly carried out leading disposal of the oil separation chamber a continuous uninterrupted function guaranteed on the entire device.

According to a further idea of the invention it is provided that in the mud catch chamber in the area of the water inlet, a baffle is arranged through which the flow calms and reduces and a swirling of the water-mud Mixture is prevented. The separation is done by gravity.

According to a further idea of the invention it is provided that the oil separator Chamber closed on the top by a preferably screwable cover is, so that a backwater of the groundwater in the septic chamber is not for ver contamination of groundwater with oil can result.

In addition, the entire device works through the integrated oil separation chamber with the coalescence separator automatically as a dirt barrier in front of the Groundwater z. B. with oil spills from vehicles.

Further advantageous embodiments of the invention are set out in the subclaims indicates.

An embodiment of the invention is described below with reference to the accompanying Described drawings.

Show it:

Fig. 1 shows a longitudinal section through an inventive device,

FIG. 2 shows a cross section through the device according to line II-II in FIG. 1.

In the figures, an apparatus for cleaning surface roads from abge is shown, which has a shaft 1 , which is divided into three chambers, namely a sludge trap chamber 2 , an oil separation chamber 3 and a septic chamber 4th

The surface water, primarily rainwater, is fed via a water inlet 5 to the sludge trap chamber 2 , the water inlet 5 being assigned a baffle 6 in the flow direction, which is attached to the inside of the sludge trap chamber 2 and by which the flow is calmed and reduced. The solid components of the surface water sink and collect at the bottom of the sludge trap chamber 2 .

Via an overflow 7 between the sludge trap chamber 2 and the oil separating chamber 3 , the surface water cleaned of solids enters the oil separating chamber 3 , the water passing a baffle 8 connected to the overflow 7 , which is closed laterally and at the top.

In the oil separation chamber 3 , an automatic closure 9 is installed, which has a coalescence filter 10 .

While coarse oil constituents collect into an oil layer on the water surface in the oil separation chamber 3 , finely dispersed oil droplets are retained by the coalescence filter 10 and also rise into the oil layer.

Via a float 12 , which is provided in the automatic closure 9 , an outlet 11 , which forms the transition from the oil separation chamber 3 to the seepage chamber 4 , can be closed when a maximum oil storage volume is reached, so that no oil can penetrate into the seepage chamber 4 .

On the underside, the percolation chamber 4 opens into a percolation layer 13 , which consists of an upper sand layer 14 and a gravel bed 15 underneath. The flowing into the percolation chamber 4 , cleaned surface water can thus penetrate unhindered into the soil 16 via the percolation layer 13 and be supplied to the groundwater by percolation.

Instead of a complete passage of the Sickerschachtes 4 for the drainage layer 13 and a partly open, for example, a grid-shaped floor can the Sic kerschacht towards complete downward.

The oil separation chamber 3 is closed on the top by a removable cover 18 , so that uncontrolled no backwater groundwater leads to a flooding of the oil separation chamber 3 with the result of contamination of the groundwater with oil.

The top of the shaft 1 is provided with an entry opening 17 which extends approximately at the same chemical level as the surface 19 of a road surface and which enables the shaft chambers 2 , 3 , 4 to be cleaned.

Reference list

1

Shaft

2nd

Sludge trap

3rd

Oil separation chamber

4th

Septic chamber

5

Water inlet

6

Baffle plate

7

Overflow

8th

chicane

9

automatic closure

10th

Coalescence filter

11

procedure

12th

swimmer

13

Seeping layer

14

Layer of sand

15

Gravel bed

16

soil

17th

Manhole

18th

cover

19th

surface

Claims (12)

1. Device for cleaning of paved roads or squares of surface water, especially rainwater, with a shaft ( 1 ), for example a multi-chamber pit, let into the ground, which has a sludge trap chamber ( 2 ) into which a water inlet ( 5 ) opens a chamber via an overflow (7) oil separating chamber connected thereto (3) and a leachate (4), on the one hand via an outlet (11) with the Ölabschei Appeal (3) and on the other hand, to a over the soil (16) open seepage ( 13 ) communicates. 2. Device according to claim 1, characterized in that the oil separation chamber ( 3 ) has a coalescence filter ( 10 ). 3. Apparatus according to claim 1, characterized in that the oil separation chamber ( 3 ) has an automatic closure ( 9 ) with which the outlet ( 11 ) can be closed at a maximum of separated oil volume. 4. The device according to claim 1, characterized in that the oil separation chamber ( 3 ) is closed on the top. 5. The device according to claim 4, characterized in that the oil separation chamber ( 3 ) is closed at the top with a cover ( 18 ). 6. The device according to claim 5, characterized in that the cover ( 18 ) is screwed to the wall of the oil separating chamber ( 3 ). 7. The device according to claim 1, characterized in that an acoustic and / or optical alarm device is provided which when reached or Exceeding a predetermined oil level can be triggered. 8. The device according to claim 1, characterized in that the shaft ( 1 ) in the transition region with the street or square surface has a closable entry opening ( 17 ) by means of a cover. 9. The device according to claim 1, characterized in that the Sickerkam mer ( 4 ) is open at the bottom. 10. The device according to claim 1, characterized in that the Sickerkam mer ( 4 ) has a bottom provided with through openings. 11. The device according to claim 1, characterized in that a baffle ( 6 ) is arranged in the sludge trap chamber ( 2 ) in the region of the water inlet ( 5 ). 12. The apparatus according to claim 1, characterized in that a baffle ( 8 ) is installed in the oil separating chamber ( 3 ) in the region of the overflow ( 7 ), which is immersed in the incoming water and is closed on the side and on the head side.