Differences between Dredgers and Sand Dredgers

While both are waterborne operations, dredgers and sand dredgers differ significantly in several aspects. First, in terms of application, sand dredgers focus on collecting sand and gravel from rivers or shallow seas, suitable for construction and roadbed projects; while dredgers are primarily used for dredging river channels and ports to ensure unobstructed navigation, and are also suitable for the maintenance of lakes and reservoirs. Second, in terms of operation, sand dredgers use suction pumps to extract sand and soil, which is then separated and screened to obtain the desired sand and gravel; dredgers use excavation devices to directly dredge riverbed sediment and separate the mud from the water. In terms of structural design, sand dredgers are large and heavy, with a strong sand storage capacity, but limited excavation power; dredgers have a complex structure, equipped with booms, cutters, and other devices, resulting in strong excavation and transport capabilities. Finally, in terms of operation, sand dredgers rely on manual operation and management, and must navigate according to the distribution of sand and gravel; dredgers can perform fixed-point excavation and have a higher degree of automation.