Trailing Suction Hopper Dredger

Aiming at the pain points of traditional dredging equipment such as "relying on tugboats, small single dredging volume, and weak ocean-going operation capacity", HAIDING SHIPYARD Trailing Suction Hopper Dredger realizes the full-process independent operation of "dredging-transporting-discharging" through self-propelled, self-dredging and self-loading integration (speed 12-15km/h, single dredging volume 2000-5000m³), CCSB steel wind-wave resistant structure (yield strength ≥235MPa), and multi-geology rake head adaptation (sludge/sand layer/weathered rock layer). The daily dredging volume reaches 15000-25000m³, 60% more efficient than non-self-propelled dredgers, providing a "high-efficiency, wide-adaptation, long-endurance" dredging solution for large-scale marine engineering.

Core Advantages

Integration of Self-propulsion, Self-dredging and Self-loading, Strong Operational Autonomy

Full-process Independent Operation: HAIDING SHIPYARD Trailing Suction Hopper Dredger equipped with 2 sets of 1200kW main propellers (speed 12-15km/h), it can realize ocean-going navigation without tugboat assistance; dual rake heads (1 set on port/starboard) are lowered to the seabed via hydraulic system, completing sediment excavation and suction simultaneously; mud is directly transported to the mud hold (capacity 2000-5000m³) through pipelines; after the hold is full, it sails independently to the mud discharge area, and completes mud discharge by opening the bottom of the mud hold or using the fill pump, with no need for external equipment in the full process;

Long Endurance Capacity: HAIDING SHIPYARD Trailing Suction Hopper Dredger equipped with 300m³ fuel tank and 50m³ fresh water tank, with a cruising range ≥3000 nautical miles, it can operate continuously in ocean-going waters for 7-10 days, adapting to the long-term dredging needs of offshore waterways (such as waterways in the South China Sea islands, ocean-going port connecting lines).

High-efficiency Dredging Design, Outstanding Operational Efficiency

Dual Rake Head Collaborative Dredging: Rake heads adopt wear-resistant alloy teeth (hardness ≥60HRC) and hydraulic angle adjustment design (depression angle 0-30°); single rake head excavation width is 3-5m, excavation force 450kN; daily dredging width can reach 80-120m when dual rake heads operate simultaneously; equipped with 250m³/h high-flow suction pump (working pressure ≥1.5MPa), mud suction concentration ≥35%, and mud hold filling time ≤2-3 hours (2000m³ hold capacity condition);

Intelligent Overflow Control System: The top of the mud hold is equipped with an automatic overflow valve and concentration sensor; when the mud concentration is lower than 20%, the overflow is automatically turned on to discharge excess seawater and improve the effective loading capacity of the mud hold (full load rate ≥90%); during the mud discharge stage, the combination of "bottom door + fill pump" at the bottom of the mud hold is used, with a mud discharge speed ≥500m³/h, adapting to the efficient cycle of "rapid mud discharge-return dredging".

Wind-Wave Resistance & Corrosion Resistance, Adapting to Ocean-Going Environment

CCSB Steel Rigid Structure: Hull, mud hold, and rake head bracket are all welded with CCSB marine steel plates; the inner wall of the mud hold is equipped with NM450 wear-resistant lining plate (thickness 10mm); key parts (propeller shaft, rake head hydraulic arm) are quenched and tempered with CCSB steel plates (hardness ≥220HB); wind-wave resistance grade ≤Grade 8 (wind speed ≤20.7m/s), which can operate stably in the South China Sea monsoon period and East China Sea offshore wind-wave environment;

Full-Ship Anti-Corrosion Treatment: The outer hull of HAIDING SHIPYARD Trailing Suction Hopper Dredger adopts fluorocarbon heavy anti-corrosion coating (dry film thickness ≥300μm) + sacrificial anode cathodic protection, with anti-corrosion life of underwater parts ≥15 years; the inner walls of rake heads and suction pipes adopt ceramic composite coating (wear resistance increased by 3 times), adapting to dredging in complex sea areas containing sand and shells, and reducing component wear.

Modular Design, Convenient Operation & Maintenance with Low Cost

Core Component Modularization: Rake head devices (including hydraulic arms and rake teeth), suction pumps, and overflow valves adopt modular assembly; they can be disassembled and replaced as a whole in case of failure, with port maintenance time ≤12 hours and ocean-going emergency maintenance ≤24 hours; the mud hold door adopts a hydraulic drive module, and vulnerable parts (sealing strips, bearings) can be quickly replaced without disassembling the overall structure;

Detailed Technical Parameters

Core Application Scenarios

Ocean-Going Waterway Dredging

Deep Waterway Widening: In the South China Sea international waterway (water depth 10-20m) and Malacca Strait connecting line (including sand and shell layers), dual rake heads are used for simultaneous dredging, with a single dredging volume of 2000-5000m³, widening the waterway from 150m to 250m to meet the two-way navigation of 300,000-ton oil tankers; intelligent overflow control ensures mud concentration and avoids secondary siltation of the waterway;

Waterway Depth Maintenance: For the outer waterway of the Yangtze River Estuary (water depth 8-15m, including fluid mud layer), regular dredging operations are carried out; the rake head depression angle is adjusted to 15° to efficiently remove fluid mud and sediment, maintaining the waterway depth above 12m to ensure year-round navigation of 100,000-ton container ships.

Port & Berth Expansion

Container Port Berth Dredging: In Shanghai Yangshan Port and Shenzhen Yantian Port (water depth 12-18m), dredging is carried out for the new 100,000-ton container berth; the dual rake heads have an excavation width of 8-10m, completing 15,000m³ of sediment cleaning at the berth bottom per day, with a dredging flatness error ≤0.5m, meeting the docking draft requirements of container ships;

Bulk Cargo Port Turning Area Expansion: In Tianjin Port Bulk Cargo Terminal (water depth 10-15m, including weathered rock layer), the turning area is dredged after replacing wear-resistant rake teeth, with an excavation depth of 8m, expanding the turning area diameter from 300m to 500m, HAIDING SHIPYARD Trailing Suction Hopper Dredger adapts to the turning operation of 200,000-ton bulk cargo ships.

Reclamation Fill

Coastal New Area Reclamation: In the Bohai Bay Coastal New Area (water depth 2-8m, soft soil layer), "dredging-fill" integrated operation is adopted; after the rake head suctions soft soil mud, the fill pump transports the mud to the reclamation area (conveying distance ≤1000m), with a daily fill reclamation area ≥10,000㎡; the foundation bearing capacity after mud consolidation is ≥120kPa, meeting the needs of industrial land construction;

Island Expansion Project: On an island in the South China Sea (water depth 5-12m), ocean-going operations are realized through self-propulsion capacity; sediment in the surrounding sea area is dredged and filled around the island, with a single fill volume of 5000m³, gradually expanding the island's land area, HAIDING SHIPYARD Trailing Suction Hopper Dredger adapts to the construction of dual-use military and civilian facilities.

Estuary & Harbor Dredging

Estuary Sediment Dredging: In the Pearl River Estuary and Yellow River Estuary (water depth 3-10m, high sediment content), the overflow system is turned on to discharge excess seawater, increasing the mud hold sediment loading rate to over 90%, with a daily dredging volume of 20,000m³, reducing the impact of estuary sedimentation on waterway navigation;

Harbor Polluted Sediment Cleaning: In Hangzhou Bay and Xiamen Port (water depth 5-12m, containing polluted sediment), closed suction pipes and mud holds are used to avoid secondary pollution caused by sediment diffusion; the cleaned sediment is transferred to the disposal area via a dedicated transport ship, realizing environmentally friendly dredging.

Service Guarantee

Customization Services

Parameter & Function Customization: Adjust the mud hold capacity (maximum expansion to 8000m³) and rake head type (hard rock-specific rake head/fine sand-specific suction rake head) according to engineering needs; for polar sea areas, add a hull heating system (cabin temperature ≥5℃) and ice-resistant rake teeth; for tropical sea areas, upgrade the power system heat dissipation device and mud hold ventilation system to prevent mud fermentation;

Value-Added Services: Assist in providing CCSB steel plate material certification (complying with CCS marine steel specifications), ship classification certification (CCSB/ABS/DNV) and ocean-going dredging operation permits; provide dredging plan design (such as waterway widening path planning, fill flow calculation); deploy a professional operation and maintenance team to provide ocean-going on-board technical support, ensuring the continuous operation stability of the equipment.