Suction dredger ADST-400M

Self-produced suction dredger with APFT series submersible pump of company Habermann Aurum Pumpen GmbH with the capacity by pulp of 360 m3/h, at the head of up to 30 m.w.c.

ADST-400M is designed for:

• Excavation of 1-3 categories’ soils;
• Recovery of sand and other non-ferrous materials;
• Aggradation of dikes, roads, construction sites;
• Dredging operations.

Thanks to the application of a submersible pump as soil intake technology without suction pipeline, it is possible to extract and handle the pulp with the sand output up to 30% by volume of nominal capacity.

This suction dredger can recover 100 m3 of wet sand and discharge it to the dumpsite located at the distance of up to 500 m, while the dredger pump power consumption is 75 kW. The total installed power of the suction dredger is 135 kW.

The suction dredger electric power is supplied from diesel-electric station installed on the board of the suction dredger. The station power is 160 kW.

The diesel-electric generator is controlled from the suction dredger operator cabin. The station is located at the stern in a special ventilated protection shelter. The type of station, as well as its manufacturer, are to be agreed with the suction dredger customer.

The suction dredger electric system can be equipped with a changeover switch. Therefore, if the power cable is provided, the suction dredger can work with the shore power supply.

The system of the suction dredger electric equipment and automation ensures all electro-technic protection measures, as well as control of current consumption and input voltage.

The suction dredger is protected against possible heeling and water availability in bilges. The device detecting the availability of water in pontoons will inform the staff about its penetration.

The suction dredger is equipped with a water jet system comprising a centrifugal pump and a jet ring with nipples mounted directly on a dredge pump. The jet pump creates the pressure of minimum 8 bars which are sufficient to loosen compressed soils with clayish inclusions.

This technology makes it possible to continuously pump water-sand mixture with a high density. Thus, hydraulic excavation operations are carried out with high efficiency. The suction dredger construction is designed as trimaran with the installation of the dredge pump at the suspension at the forepart of pontoons. Lifting and submerging of the pump is carried out by means of winch through gantry with a block mechanism. To ensure smooth lifting and submerging, the pump winch drive is equipped with a frequency converter.

The suction dredger transportation and maneuvering within the water body are carried out using four mooring winches installed on side pontoons in the corners of a suction dredger. This suction dredger can reach the excavation depth of 30 m. The suction  dredger has got a modular design, thus, it can be transported by trucks. To assemble a suction dredger, 2 days are sufficient.

The suction dredger is easy in operation maintenance. The spare parts’ replacement is carried out directly on the suction dredger without the need to dismount the pump. The maintenance personnel for the suction dredger should include 2 employees including the servicing of the discharge site. If necessary, the suction dredger can be equipped with discharge pipelines from PE, power cable, and steel pontoon-type floaters.