DE20022637U1 - Cleaning device for oil and petrol separators for cleaning during operation - Google Patents

Description

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2 Description

2.1 State of the art

Conventional oil and petrol separators in wastewater treatment separate floating matter (oils, fats, petrol, etc.) and sediment (sludge) from the incoming wastewater. The filtered water is discharged into the normal sewage system via a special outlet (siphon). The pollutant components are collected in the separator and must be disposed of when they reach a certain level. To do this, the contents of the separator are emptied and the container is cleaned. Depending on the size and function of the company, the TÜV specifies certain container sizes of several cubic meters.

As the accumulation of pollutants in the separator increases, the quality of the filtered water decreases. This water quality is measured by taking samples at the outlet of the separator. The thickness of the oil and sludge layer is measured and a cleaning interval is set accordingly. The respective cleaning intervals are specified by the TÜV and range from 6 to a maximum of 60 months.

2.2 Problems

This conventional procedure has two major problems. Firstly, the quality of the discharged, filtered water decreases steadily as the amount of pollutants stored in the separator increases. In extreme cases, an oil spill occurs in a company precisely when the storage capacity of the separator is almost reached. The amount of oil that accumulates can no longer be completely absorbed by the separator and an overflow occurs.

On the other hand, cleaning a separator and disposing of the container contents causes considerable costs, since the entire contents of a separator are disposed of in each case.

2.3 Solution

The separator for oil, petrol and sludge with the integrated cleaning devices according to claims 1 and 2 serves to solve these problems. These additional cleaning devices ensure a constant cleaning of a separator during operation.

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Cleaning device for oil and petrol separators

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the operation. The pollutants are discharged into separate, drainless disposal containers. This ensures that only the actual pollutants are filtered out, with minimal water content.

At the same time, the discharge of pollutants due to over-sludge or excessive oil density is practically impossible, since these wastewater components are continuously drained away, in contrast to the previous procedure. This ensures consistently good wastewater values, so that in principle cleaning would only be necessary at intervals of 60 months.

In the event of a failure of the integrated cleaning devices according to protection claims 1 and 2, it is also ensured that the system still fulfils the function of a conventional oil and petrol separator.

2.3.1 Function of the additional cleaning device

The cleaning device (see Figures 1-5) is driven by an E-motor via a reducer using a V-belt device. The duration and time of the cleaning process is controlled by an electronic switch relay. The E-motor simultaneously drives the slow circular movements of the scraper and the screws. The screws are connected to each other via gears.

The protection claims include two device expansion levels:

• Protection claim 1

In this stage of development, a combined removal of pollutants such as oil, petrol and
Sludge (see Figures 1 and 2). It is used where even small amounts of oil
and petrol separators with small amounts of oil or petrol.

• Protection claim 2

The device parts listed in claim 2 are optional expansion components to
the components of protection claim 2. This optionally extended device expansion stage
ensures separate removal of oils/petrols and sludge (see Figures 3 and 4). It is used where large quantities of oil and petrol are produced.

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Cleaning device for oil and petrol separators

2.3.2 Protection claim 1

For a combined cleaning of oil sludge, only a simplified cleaning device is required. The necessary system components are described in Figures 1 and 2.

Figure 1 (view 1) illustrates the sludge disposal. The sludge slides through the sloped bottom of the separator tank to the receiving opening of screw I and is transported upwards into the compression chamber. Here, the water is squeezed out and the sludge is taken over by screw II and led to the drainless collection tank.

Figure 2 (top view of method 1) and Figure 5 (special drawings) illustrate the oil and petrol disposal. The oil layer is guided to the guide plate with the help of the scraper. The rubber mat of the scraper slides over the guide plate. The water flows off the rubber mat. The oil in turn is scraped off the scraper plate. The oil runs through the intake opening into screw II and mixes with the sludge taken over by screw I to form an oil sludge mixture. This is transported away to the pollutant collection container without a drain.

23.3 Protection claim 2

When cleaning oils and sludge separately, an inlet cover with oil drainage channel and another conveyor screw &Igr;&Pgr; are required as additional system elements. These components are provided as optional upgrade kits. The necessary system components for this process are described in Figures 3 and 4.

Figure 3 (view of process 2) illustrates the use of the additional screw I. The sludge is collected by screw I in the procedure already described and is led via screw II to a drainless sludge collection container. The additional screw III is used independently of this disposal system exclusively for the separation of oil and petrol.

Figure 4 (top view of method 2) and Figure 5 (special drawings) illustrate the oil and petrol disposal. In this method, cleaning takes place via the two screws II and III. The oil intake opening of screw II is closed with a special inlet cover (see Figure 5, special drawing I). On this cover

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Cleaning device for oil and petrol separators

There is also an oil drainage channel which leads into the oil intake opening of screw III.

At screw II, the oil is scraped off at the scraper plate. In this case, however, the oil does not flow into the oil intake opening of screw II, but is guided via the oil channel to the intake opening of screw Π.

In a similar way, another oil cleaning process takes place on screw III. Here, however, the oil flows directly into the oil intake opening and is transported from there into a drainless oil collection container

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Cleaning device for oil and petrol separators

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List of reference symbols for utility model protection application 200 22 637.1

Fig. 1: View of protection claim 1 Fig. 2: Top view of protection claim 1

(D Snail I (1) Snail!! (2) Snail Il (2) Inlet with overflow barrier (3) Compression chamber (3) Outlet with , (4) Scraper plate Flood barrier device (5) Baffle (4) Coalition filter (6) Scraper (rubber mat) (5) Scraper plate (7) Counterweight (6) Baffle (8th) &Egr;-motor with reducer (7) Scraper (rubber mat) (9) Gear drive (8) Counterweight (10) Mud intake opening (9) &Egr;-engine with reducer (11) Oil intake opening (10) Gear drive (12) Oil sludge discharge (11) Oil intake opening (13) partition wall (12) Oil sludge discharge (13) Partition wall Fig . 3: View of protection claim 2 Fig. 4: Top view of protection claim 2 (D Snail I (1) Snail II (2) Snail Il (2) snails; (3) Snail III (3) Inlet with overflow barrier (4) Compression chamber (4) Outlet with (5) Scraper plate Flood barrier device (6) Baffle (5) Coalistence filter (7) Scraper (rubber mat) (6) Scraper plate (8th) Counterweight (7) Baffle (9) &Egr;-motor with reducer (8) Inlet cover with oil drain channel (10) Gear drive (9) Scraper (rubber mat) (11) Mud intake opening (10) Counterweight (12) Oil intake opening (11) E-motor with reducer (13) Inlet cover, (12) Gear drive (14) oil drain channel (13) Partition wall (15) Outlet mud (14) Oil intake opening (16) Oil leak (15) Oil outlet (17) partition wall (16) Sludge outlet

Fig. 5: Special drawing

Special drawing I: Oil drain device

(1) Snail I

(2) Scraper plate

(3) Baffle

(4) Inlet cover with oil drain channel

Fig. 5: Special drawings II

Special drawing II: Scraper

(1) Counterweight

(2) Rubber mat

Claims (2)

1. Oil and petrol separator for waste water treatment, characterized in that it is equipped with an additional cleaning device ( Fig. 1, 2 and 5) for oil sludge disposal during operation, consisting of: - Vertical conveyor screw ( Fig. 1 ( 1 )) with sludge intake opening ( Fig. 1 ( 10 )). - Horizontal conveyor screw ( Fig. 1 ( 2 ), Fig. 2 ( 2 )) with guide plate ( Fig. 1 ( 5 ), Fig. 2 ( 6 )), stiffening plate ( Fig. 1 ( 4 ), Fig. 2, ( 5 )), oil intake opening ( Fig. 1 ( 11 ), Fig. 2 ( 11 )) and oil sludge outlet ( Fig. 1 ( 12 ), Fig. 2 ( 12 )). - Compression chamber ( Fig. 1 ( 3 )) connecting the vertical conveyor screw ( Fig. 1 ( 1 )) and the horizontal conveyor screw ( Fig. 1 ( 2 ), Fig. 2 ( 2 )). - Scraper ( Fig. 1 ( 6 ), Fig. 2 ( 7 )) with rubber mat ( Fig. 5 II ( 2 )) and counterweights ( Fig. 1 ( 3 ), Fig. 2 ( 8 ), Fig. 5 II ( 1 )) - Electric motor with reducer ( Fig. 1 ( 8 ), Fig. 2 ( 9 )) - Gear drive ( Fig. 1 ( 9 ), Fig. 2 ( 10 )) 2. Oil and petrol separator for waste water treatment according to claim 1, characterized in that it is equipped with additional extension components ( Fig. 3, 4 and 5) for oil sludge disposal during operation, consisting of: - Horizontal conveyor screw ( Fig. 3 ( 3 ), Fig. 4 ( 2 )) with guide plate ( Fig. 3 ( 6 ), Fig. 4 ( 7 )), scraper plate ( Fig. 3 ( 5 ), Fig. 4 ( 6 )), oil intake opening ( Fig. 3 ( 12 ), Fig. 4 ( 14 )) and oil outlet ( Fig. 3 ( 16 ), Fig. 24 ( 15 )). - Inlet cover with oil drain channel ( Fig. 3 ( 13 ), Fig. 4 ( 8 ), Fig. 5 ( 4 ))