Dredging Depth Comparison: Cutter suction dredgers have a dredging depth of 25-30 meters; trailing suction hopper dredgers have a dredging depth exceeding 35 meters.
Working Area Differences: Cutter suction dredgers are suitable for dredging in inland rivers, lakes, and coastal ports with low wind and current speeds; trailing suction hopper dredgers have strong resistance to wind and waves, making them ideal for operation in coastal ports, waterways, wide river surfaces, and ship anchorages.
Suction Head Structure Comparison: Cutter suction dredgers consist of a suction pipe with a rotating cutter device surrounding the front end; trailing suction hopper dredgers consist of a suction pipe with a rake-like device at the front, similar to a plow.
Cost Comparison: Cutter suction dredgers are economical and practical; trailing suction hopper dredgers are relatively more expensive, with the cost of domestically produced trailing suction hopper dredgers being approximately 20,000 RMB per cubic meter (per cubic meter of hopper capacity).
Offshore Distance Comparison: Cutter suction dredgers need to continuously transport the dredged material, with a discharge distance generally around 1000 meters, thus limiting their working range; trailing suction hopper dredgers integrate all dredging equipment, working independently and having a wider working range.
Construction Requirements Comparison: Cutter suction dredgers require anchoring and mooring lines for mud discharge, which can affect other vessels and usually necessitates port closure; trailing suction hopper dredgers work independently without requiring port closure, and port operations are virtually unaffected.
Dredging Material Comparison: Cutter suction dredgers are basically suitable for excavating various types of soil; trailing suction hopper dredgers are suitable for excavating silt, clay, and sandy riverbeds.
