Kovako units can be delivered for a wide range of capacities.
Smaller units have nominal capacities below 100 tph.
Units up to 800 tph have been delivered.
The capacity Kovako specifies for its unloaders is the Nominal Capacity. This is the capacity that the unloader can achieve continuously until the clean-up phase starts.
When calculating the total unloading time of a ship, it has to be considered that the capacity of the unloader drops during the clean-up phase. The actual clean-up capacity depends on the efficiency of the clean-up operation.
High capacity unloader: 800 tph
Ship Size
Kovako unloaders can be made for all sizes of ships, ranging from small river barges up to 40.000dwt ships.
The length of the suction arm and the section lengths are sized for the maximum size of ships that have to be unloaded, taking into account quay heights, tidal levels, etc.
Most suction arms have 3 arm sections. Road mobiles and units with special requirements (e.g. restrictions regarding transport dimensions) have 4 section arms.
If required, the suction arms are fitted with a rotary nozzle. This depends on factors like the material that has to be unloaded, required unloading capacity and ship size.
Suction arm in 40.000 dwt ship
Discharge system
A typical Kovako shipunloader has a pneumatic discharge system. The unloaded material is discharged pneumatically through a conveying pipeline all the way to the storage facility.
Kovako can also deliver units with a mechanical outloading system.
The outloading system can load the material directly into trucks or to a mechanical conveying system such as a belt conveyor.
CSP-unit with mechanical outloading direct into bulktrucks
Support structure
Kovako units can be delivered with various support structures:
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Road mobile trailer
The overall dimensions of a road mobile units allow road transport of the unloader. The maximum ship size and capacity are restricted however.
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Road capable trailer
Road capable units can be transported over the road, but special permits are required. Some parts of the unit may have to be transported on a separate trailer. Maximum ship size and capacity are somewhat restricted.
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Mobile platform
Units that are designed for transport within the port area.
A mobile platform can be self-propelling. If not, it is moved by a pulling vehicle (truck or front-end loader).
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Railmounted gantry
These units travel on rails on the dock or jetty. Typically, they are fitted with electrically driven bogie sets.
The gantry can be made high if vehicles have to pass underneath the gantry.
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Skid(s)
Skid mounted units can be mounted on the quay or on a barge.
All conveying equipment is built on one or more skids. The number of skids and the size of the skids depend on the unloading capacity, ship size and discharge length.
Skid mounted, electrically driven, unit on barge
For unloading of open top barges and fluidized barges
Diesel driven or electrically driven
Kovako shipunloaders can be delivered diesel driven or electrically driven.
Diesel driven units do not require any outside power source. The electrical power for the unit is delivered by an on-board generator.
Electrically driven units can be made for either LV or HV power supply.
If required, they are fitted with a cable reel and/or transformer.
An electrically driven, rail mounted
unloader for 40.000 dwt ships