A vessel fitted with a MacGregor cargo scooper system has all the necessary equipment to undertake fast and efficient autonomous unloading operations. The cargo scooper is a surface-scraping discharge system that unloads cargo from the top of the cargo pile, working downwards. The principal elements are a hoistable scraper system fitted in each cargo hold, bucket elevators, deck conveyors and a boom conveyor.
The scrapers gently shave off layers from the surface of the cargo and direct the material to a bucket elevator. Each elevator serves two holds.
The elevator lifts the cargo above deck level and transfers it to a customised conveyor system. The final stage, transfer to the shore, is achieved via a slewing and hoistable shuttle boom or a pneumatic discharge system.
Animation: MacGregor cargo scooper system
As the cargo scooper system operates with closed hatch covers, it ensures virtually dust-free operations. The boom conveyor feeding the material from the vessel to the shore can also be fully enclosed, minimising spillage and dust in this phase of the discharge. Dust collectors can be installed on the boom, further reducing dust emissions.
In addition, the new MacGregor enclosed boom reduces spillage and dust emissions to an absolute minimum.
This enclosed discharge system ensures a clean ship and a clean quay with minimal environmental impact on the surrounding areas. It also has a beneficial effect on the working conditions of the crew and stevedores.
In addition, the conveyor technology ensures the lowest possible power consumption, saving money and minimising emissions as a result of the reduced electrical generation requirements. The conveyors are powered by electric drives, with or without variable frequency control.