Dredgers mainly handle soft materials such as silt and silt, which usually contain high moisture and viscosity. The sand dredger mainly deals with hard substances such as sand and soil, which are relatively dry and loose. There are significant differences between sand dredgers and dredgers in terms of ship type design, working principles, applicable scenarios, and operating objects. These differences make them play irreplaceable roles in specific engineering fields.

Dredgers mainly use various types of dredging machinery for operations, such as grab buckets, suction pipes, etc. Through excavation, vertical lifting, and horizontal transportation, they excavate silt or sediment underwater and transport it to the designated destination. The sand dredger drives the excavator bucket to load materials through a power device, and cooperates with screening devices, lifting devices, and conveying devices to screen and clean the excavated sand for continued use or sale.

Dredgers play a crucial role in modern water construction. In the port expansion project, dredgers can quickly remove silt and obstacles from the waterway and harbor, providing safety guarantees for the passage of ships. In river dredging projects, dredgers can effectively remove sediment and sediment from the riverbed, restore the navigation and flood discharge capacity of the river. In addition, dredgers are widely used in fields such as marine engineering, coastal protection engineering, and reservoir construction.

The working principle of a dredger is relatively simple and efficient. It mainly utilizes its own excavation equipment, such as grab buckets, suction pipes, etc., to conduct excavation operations underwater. The excavated sediment is transported through pipelines to designated locations, such as the shore, barges, or other treatment facilities. The dredger is also equipped with a powerful power system and positioning system to ensure stable and accurate operation in complex water environments.