A dredger is an engineering vessel mainly used for dredging, channel dredging, land reclamation, sand extraction and other construction projects in rivers, lakes, seas and other water bodies. Dredgers can be divided into rake suction dredgers, cutter suction dredgers, chain bucket dredgers, grab bucket dredgers, etc. according to their working principles.

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 usually adopt a multi-layer flat bottomed ship design, which has good stability and load-bearing capacity and can cope with various complex water environments. Sand dredgers, on the other hand, are usually designed with single-layer or double-layer flat bottomed boats, which have a relatively simple hull structure and mainly meet the needs of sand mining in waterways and other water areas. Dredgers are mainly used in water areas with silt accumulation, such as rivers, lakes, etc., with the main purpose of maintaining smooth navigation channels or clearing floating debris. And sand dredgers are mainly used in large-scale construction and earthwork projects, to excavate sand or soil for construction purposes.

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.

In the vast ocean and vast rivers and lakes, there is an unknown yet crucial role - the dredger. It is not only a powerful assistant in water construction, but also a key force in river dredging, port expansion and other projects. This article will take you in depth to understand the working principle, types, and applications of dredgers in modern engineering.

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