DE29911313U1 - Arrangement for sludge dewatering - Google Patents

Description

[Utility model application]

PA Dipl.-Ing. KHVoß
Kruseshofer Str. 20
17 036 Neubrandenburg
Tel. 0395-7077271 Fax 7077272 AZ PlO-99

[Name of the invention]

Arrangement for sludge dewatering

G10-99Sludge treatment / 30720 Byte / 25.06.99 16:47:40

[Description]

The innovation concerns an arrangement for draining sludge that accrues during the desilting of bodies of water. Many ponds and lakes have become silted up due to years of high nutrient pollution. This affects the water quality and leads to the biological death of the body of water. Rivers and ports often have to be desilted in order to maintain the required water depth.
Desludging is very costly due to the large quantities involved and their disposal.

[State of the art]

The usual method of desludging consists in the construction of flushing fields/polders into which the sludge is pumped from the bottom of the watercourse. There, drainage takes place through natural settling.

The dried sludge is then dredged and transported away. This process is time-consuming and expensive. Problems also arise from the space required and the disposal of the treated water.
It is known that devices such as belt filter presses can be used in the polders to accelerate drainage.

In order to reduce the costs, DE GM 8303030 proposed installing appropriate separation and drainage devices on a ship. This can save some of the land area.
However, this process is technically very complex.

The processed sludge must be transferred to another transport vehicle
be transshipped for removal.

[Task of the invention]

The object of the invention is therefore to further reduce the effort involved in desludging by combining the transport unit and sludge dewatering.

This object is achieved in that a transport vehicle is designed with at least one additional inner wall for a sludge collection container, the inner wall has a water-permeable structure and a water collection chamber with a pump is arranged under the sludge collection container.

G10-99Sludge treatment / 30720 Byte / 25.06.99 16:47:40

The innovation makes use of the knowledge that the sludge from bodies of water partially drains itself under its own weight, so that it can be transported. By installing appropriate draining sludge collection containers in transport vehicles, land space and handling work are saved. In a further development of the innovation, the floor of the loading area of the transport vehicle forms the water collection space, or a water collection space is formed in it using additional fittings. The fittings can be fixed or removable. The separated water with suspended particles is continuously pumped out. It can be returned to the body of water or rained on land. The drained sludge remains in the transport vehicle and is transported to its destination. The travel time can be used for further drainage. An additional dosing device is also intended to dose lime or similar substances into the sludge collection container. This improves drainage and prepares the sludge for use, e.g. for soil improvement.

[Examples]

The invention will be explained in more detail below using an exemplary embodiment.

Figure 1 shows the cross-section of a barge with sludge collection tank, Fig. 2 shows the arrangement of several sludge collection tanks in plan view.
A sludge collection tank is built into the body of a barge 1 using elements made of perforated sheet metal 2. This rests on the floor so that there is space for the escaping water. An additional floor forms a pump sump. The water can be continuously pumped out through a pipe (3). Depending on the quality of the sludge, the wall 2 can be supplemented with a water-permeable material, e.g. fleece. Once the dewatered sludge almost fills the holds, it can be transported away without any further handling.

/ 30720 bytes / 06/25/99 4:47:40 p.m

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[List of reference symbols]

Gl0-99SCHIaItUtIeIItWa / 30720 Bytes / 06/25/99 4:47:40 p.m

Claims (8)

1. Arrangement for sludge dewatering on a vehicle, characterized in that a transport vehicle ( 1 ) is designed with at least one additional inner wall ( 2 ) for a sludge collecting container, the inner wall has a water-permeable fine structure and a water collecting space with a water drain ( 3 ) is arranged under the sludge collecting container. 2. Arrangement according to claim 1, characterized in that the transport vehicle is a barge ( 1 ), in the loading space of which additional, water-permeable inner walls ( 2 ) and floors for a sludge collecting container and additional floors for a water collecting space are arranged under the sludge collecting container, the water collecting space being connected to a pump via a pipeline ( 3 ). 3. Arrangement according to claim 1 and 2, characterized in that in the hold of a barge ( 1 ) several sludge collecting containers and water collecting chambers are arranged one behind the other in the form of installation kits. 4. Arrangement according to claim 1, characterized in that the transport vehicle is a railway wagon in whose loading space several sludge collecting containers are arranged longitudinally one behind the other. 5. Arrangement according to claims 1 to 4, characterized in that the inner wall ( 2 ) consists of perforated sheet metal with a hole diameter of 1 to 5 mm. 6. Arrangement according to claims 1 to 4, characterized in that the inner wall ( 2 ) consists of a grid which is covered with a water-permeable material. 7. Arrangement according to claims 1 to 6, characterized in that the floor of the loading space of the transport vehicle ( 1 ) forms the water collection space. 8. Arrangement according to claims 1 to 7, characterized in that a dosing device for lime and similar substances is arranged at the opening of the sludge collecting container.