DE102009009986A1 - Grey water utilization plant comprises a supply container, a filter container, a device for conveying grey water from the supply container into the filter container, and compressed air siphon having inlet arranged below in the container - Google Patents

Abstract

The grey water utilization plant comprises a supply container (1), a filter container (7) and/or a device for conveying grey water from the supply container into the filter container. The device for conveying grey water is a pumping device (5) that communicates over an inlet with a check valve (9) with the supply container. The pumping system is arranged with an air connection (13) for subjecting with compressed air. A compressed air siphon has an inlet arranged below in the supply container with the check valve and an uptake. The check valve is a standard component from sanitary area. The grey water utilization plant comprises a supply container (1), a filter container (7) and/or a device for conveying grey water from the supply container into the filter container. The device for conveying grey water is a pumping device (5) that communicates over an inlet with a check valve (9) with the supply container. The pumping system is arranged with an air connection (13) for subjecting with compressed air. A compressed air siphon has an inlet arranged below in the supply container with the check valve and an uptake. The check valve is a standard component from sanitary area. The compressed air is delivered by an air pump that is used for the ventilation of the contents of the supply container. An electrically controllable pressure relief valve is arranged in a compressed air direction between the air pump and the pumping device.

Description

The The present invention relates to a greywater utilization plant with a compressed air lift.

at Greywater treatment plants are usually provided two gray water tank, namely once a greywater tank as buffer storage and furthermore a filter tank, in which the membrane filter is used. The water level in the Filter tank should not sink below the top edge of the membrane filter. For fluctuations in gray water, therefore, the gray water tank is provided as a storage tank.

Around keep the water level in the filter tank approximately constant must greywater is repeatedly pumped from the storage tank into the filter tank. After the well-known state of the art this is an electrical Submersible pump provided. This pump requires electrical energy, additional electrical connections and Above all, it is an unwanted one Noise source.

to promotion of filtrate from the filter container It is known in the field of greywater plants, a compressed air lift to be used according to the construction principle of the mammoth pumps. These air lifters work with the for the ventilation the membrane filter set anyway required compressed air. They work though only satisfactory if the water level in the filtrate not too low. Such a pump is therefore for reservoir with strongly fluctuating water level not suitable.

It is therefore an object of the present invention, a greywater treatment plant to improve that the storage tank a simple, quiet and without electrical installation in the tank working lift which conveys gray water from this tank into the filter tank. These Task is a compressed air lift with the features of the claim 1 solved.

Because the airlift over one down in the reservoir arranged inlet with a backflow prevention device, in particular with a non-return valve, and over has a riser, can by pressure buildup the check valve be closed and the gray water are transported through the riser from the reservoir. Further features of the present invention are described in the dependent claims and set forth in the following description of the figures.

following is an embodiment of Present invention described in more detail with reference to the drawing. Show it:

1 : a greywater treatment plant with a reservoir and a filter tank in a schematic representation;

2 : the lifting device of the reservoir out 1 in a side view; such as

3 : the lifting system off 2 in a front view.

In the 1 a greywater treatment plant is illustrated in a schematic representation. The system includes a reservoir 1 , in which the resulting gray water from the shower and the washing machine arrives. The storage tank 1 is with an aerator 2 provided for the maintenance of aerobic conditions with compressed air from an air pump 3 via a distribution valve 4 is charged. A lifting system 5 is in the reservoir 1 arranged to gray water if necessary via a riser 6 in a filter container 7 to transport. In the filter container 7 is the known membrane filter with other ancillary units arranged, which will not be described here.

The lifting system 5 includes an enema 8th , the one flap 9 having. The flap 9 opens for the inlet of gray water from the reservoir 1 in the lifting system 5 , It closes when a flow occurs in the opposite direction, for example, a pressure increase within the lifting system 5 , Next is the lifting system 5 with an inlet tank 10 provided, which represents a ground-level volume. A jacket pipe 11 goes from the bottom of the lift 5 up to two connections. A connection 12 is for the connection of the lifting system 5 with the pipe 6 provided while a second connection 13 for the connection of the lifting system 5 with a compressed air line 14 is provided. The compressed air line 14 is at the other end on the valve 4 connected and with an electromagnetic venting valve 15 connected as a pressure relief valve. In the lower third of the jacket tube 11 is still an additional volume 16 arranged, which is the inner volume of the lifting system 5 increased.

The 2 shows the lifting system 5 in a separate presentation. Same components bear the same reference numbers. Inside the jacket tube is a riser 17 placed close to the bottom of the lift 5 enough. The riser 17 is about the connection 12 for connection to the line 6 out 1 set up.

3 shows the lifting system 2 in an end view, opposite to the 2 rotated by 90 °.

The enema 8th with the flap 9 is as a substantially cylindrical member to the inlet 10 stated. Such flaps are available as check valves in the sanitary area in standard diameters.

During operation, the system works as follows:
Gray water from the connected building runs into the storage tank 1 and is collected there. Through the enema 8th and the flap open in that direction 9 the water also runs into the lifting system 5 until the level in the reservoir is equal to the level in the elevator 5 is. The air pump 3 is in operation and delivers via the distribution valve 4 (here a 3/2-way valve) air into the aerator 2 , This air is required to prevent the occurrence of anaerobic conditions in the reservoir 1 to avoid.

In the filter container 7 a membrane filter set is arranged which operates solely on the basis of the pressure difference between the pending greywater and the filtrate. It is therefore necessary to gray water in the filter tank 7 to a height that allows the filtering process. This height is optionally above the gray water level in the reservoir 1 ,

To gray water from the reservoir 1 to promote the valve 4 placed in a switching position in which the air pump 3 into the pipe 14 promotes. The ventilation valve 15 is closed. It will therefore air over the connection 13 in the jacket tube 11 pumped. Due to the pressure increase in the jacket tube 11 this flows inside the lifting system 5 greywater against the flap 9 closing and sealing in that direction. The further increase in pressure causes the gray water in the lifting system 5 in the riser 17 and then over the connection 12 into the pipe 6 climbs and finally into the filter container 7 is encouraged. This process is maintained until the filter container 7 a sufficient water level has been achieved or until the water level in the lifting station 5 to the bottom of the riser 17 enough. Then the valve 4 brought back into the switching position in which the pump 3 with the aerator 2 connected is. The lifting system 5 is still pressurized. Opening the ventilation valve 15 ensures a pressure relief within the lifting system 5 , causing gray water from the reservoir 1 over the flap 9 again in the lifting system 5 can flow until a leveling is achieved. Is still missing water in the filter tank 7 , the process is restarted.

By the filtering process in the filter container 7 Also decreases after removal of the filtrate, the water level in the container 7 , so that a refilling by pressurizing the lifting system 5 is regularly required.

The lifting operation is, as described above, solely by pressurizing the air pump 3 causes. The air pump 3 is to supply the aerator 2 anyway required. The additional installations are limited to the valve 4 , The administration 14 and the valve 15 , There are no electrical fittings in the reservoir 1 required, in particular no submersible pump. The lifting system 5 can work relatively slowly, which reduces noise.

1

reservoir

2

aerator

3

air pump

4

distribution valve

5

lifting unit

6

riser

7

filter container

8th

enema

9

flap

10

fill tank

11

casing pipe

12

connection

13

connection

14

Compressed air line

15

vent valve

16

additional volume

17

riser

Claims (5)

Greywater utilization plant with a storage tank ( 1 ) and a filter container ( 7 ) and with a device for conveying gray water from the reservoir ( 1 ) in the filter container ( 7 ), characterized in that the device comprises a lifting device ( 5 ), which is over an enema ( 8th ) with a backflow prevention device, in particular with a non-return valve ( 9 ) with the reservoir ( 1 ) and that the lifting system ( 5 ) with an air connection ( 13 ) is set up for admission with compressed air. Greywater utilization plant according to claim 1, characterized in that the compressed air lifter one in the bottom of the reservoir ( 1 ) arranged inlet ( 8th ) with a non-return valve ( 9 ) and a riser ( 17 ) having. Greywater utilization plant according to one of the preceding claims, characterized in that the non-return flap ( 9 ) is a standard component from the sanitary sector. Greywater utilization plant after one of the preceding claims, characterized in that the compressed air from an air pump ( 3 ), which is also used for the ventilation of the contents of the storage tank ( 1 ) is being used. Greywater utilization plant according to one of the preceding claims, characterized in that in a compressed air line ( 14 ) between the air pump ( 3 ) and the lifting device ( 5 ) a preferably electrically controllable pressure relief valve ( 15 ) is arranged.