Recently, the reporter learned in the China State Shipbuilding Group 2024 state-owned Enterprise Open Day activity that the construction of 35,000 square meters of domestic giant rake suction dredger has made stage progress: in terms of design, about 60% of the workload has been completed; In terms of construction, part of the sub-construction has been completed and is expected to be completed and delivered in the first half of 2026. At that time, the ship will become the largest rake suction dredger in Asia.

    The ship was invested by China Communications Construction Group Co., LTD., developed and designed by China State Shipbuilding Group Co., LTD. 708 Research Institute (hereinafter referred to as "708 Institute"), and Shanghai Zhenhua Heavy Industry Qidong Ocean Engineering Co., Ltd. officially started construction in January this year.

    According to the design, the length of the ship is about 195 meters, the width is 38.5 meters, the depth is 18.0 meters, the dredging draft is 13 meters, the maximum mud tank capacity is about 35,000 square meters, the maximum digging depth is 120 meters. The ship adopts spherical bow, double tail fin ship type and advanced "one tow two" compound drive mode, equipped with double conduit propeller, double rake, double underwater pump and cabin pump, with mud door discharge, single and double pump bow blowing and double bow spray bank discharge and other operation functions, as well as advanced intelligent dredging control system. The vessel is also reserved for methanol fuel use.

    "The ship has the technical characteristics of strong loading capacity, strong excavation capacity, green, efficient and intelligent, which is mainly suitable for dredging, blowing and filling as well as deep-water sand extraction projects in the Yangtze River estuary, Pearl River Estuary and other coastal ports and channels." Ship design master, 708 institute chief expert Feron said.

    According to the size, the suction dredger is divided into small, medium, large and giant. Giant rake suction dredger refers to more than 30,000 square rake suction dredger. Up to now, the largest rake suction dredger in China is 26,800 square meters and has not yet been delivered.

    Feron introduced that the 35,000 square giant scraper suction dredger side design and construction, the biggest challenge is to solve the power system, electric drive system, 5000 kilowatt underwater motor and other key equipment problems. "The development of the ship will make up for the equipment gap of China's 30,000-square-class giant rake suction dredger, and effectively promote the development of upstream and downstream industries of dredging equipment and ship construction and improve the technical level." "Feron said.

    708 Institute from the 1990s began to get involved in the dredging equipment development and design field, up to now, independent research and development design and delivery of more than 40 large, small, medium and large rake suction dredger, to achieve China's large, medium and small rake suction dredger type from the whole ship imported to independent research and development across.

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